Universal joint bearings and universal joint cross

Abstract

The invention relates to a universal joint bearing (10) comprising a journal (12), a cup (14), rolling elements (16) that support the cup rotatably relative to the journal, and at least one seal (18) that seals a space (20) between the journal and the cup. The cup has an at least substantially cylindrical surface (22) that is part of a radially outer surface (24) of the universal joint bearing, with all rolling elements of the universal joint bearing being arranged in a specific number of rows (26) of rolling elements. It is proposed that a sum of the maximum axial lengths (28) of all rolling element rows divided by the sum (30) of the maximum axial length of the at least substantially cylindrical surface and the maximum axial length of the entire radially outer surface (32) of the at least one seal, which is part of the radially outer surface of the universal joint bearing, be between 0.6 and 0.75.

Claims

[1] Universal joint bearing (10) comprising a journal (12), a cup (14), rolling elements (16) which support the cup rotatably relative to the journal, and at least one seal (18) which seals a space (20) between the journal and the cup, wherein the cup has an at least substantially cylindrical surface (22) which is part of a radially outer surface (24) of the universal joint bearing, wherein all rolling elements of the universal joint bearing are arranged in a certain number of rows (26) of rolling elements, characterized by that a sum of the maximum axial lengths (28) of all rolling element rows divided by the sum (30) of the maximum axial length of the at least substantially cylindrical surface and the maximum axial length of the entire radially outer surface (32) of the at least one seal, which is part of the radially outer surface of the universal joint bearing, is between 0.6 and 0.

75. [2] Universal joint bearing (10) according to claim 1, characterized by in that a first rigid part (34) of the seal (18) comprises, in an axial section, a first arm (36) and at least one second arm (38) which are connected by an intermediate part (40) of the first rigid part, the first arm and the second arm extending from the intermediate part in the direction of the rolling elements (16). [3] Universal joint bearing (10) according to claim 2, characterized by that a sealing lip (42) of the seal (18) bears against a radial outer surface (44) of the second arm (38). [4] Universal joint bearing (10) according to at least one of the preceding claims, characterized byin that the pot (14) comprises a base (46) with a recess (48) and the journal (12) extends into the recess, wherein the universal joint bearing comprises a first row (26) of the rolling elements (16) which is directly adjacent to the base, wherein the first row of rolling elements comprises at least one rolling element with a running surface (50) which is in contact with the journal along its entire axial extent. [5] Universal joint bearing (10) according to at least one of the preceding claims, characterized by in that the pot (14) comprises a base (46) with a first elevation (52) and at least one second elevation (54), and the universal joint bearing comprises a row (26) of the rolling elements (16) which is immediately adjacent to the base, this row of rolling elements comprising rolling elements which directly contact the first and the second elevation. [6] Universal joint bearing (10) according to at least one of the preceding claims, characterized bythat the pin (12) in an axial region (56) of the seal (18) comprises at most two surface regions (58, 60) which have the shape of a circular cylindrical tube. [7] Universal joint bearing (10) according to at least one of the preceding claims, characterized by a disc (62) arranged between the pin (12) and at least a part of the bottom (46) of the pot (14) and comprising grooves (64, 66) on two opposite sides (68, 70). [8] Universal joint cross (72) with a universal joint bearing (10) according to at least one of the preceding claims. [9] Universal joint cross (72) according to claim 8, characterized bythat the universal joint cross comprises a cross-shaped component (74) which surrounds the journal (12), and twice the distance between the center of mass (76) of all rolling elements (16) of the universal joint bearing (10) and the center of mass (78) of the cross-shaped component divided by the maximum outer diameter (80) of the pot is less than 2.23 and greater than 1.

8. [10] Universal joint cross (72) according to at least one of claims 8 or 9, characterized by that the universal joint cross comprises a cross-shaped component (74) which comprises the journal (12), and the dynamic load capacity of the universal joint bearing (10) divided by twice the distance between the center of mass (76) of all rolling elements (16) of the universal joint bearing and the center of mass (78) of the cross-shaped component is greater than 0.6 kN / mm and less than 0.9 kN / mm.

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