DE8230552U1 - BOTTOM BEARING UNIT FOR BICYCLES OD. DGL. - Google Patents

Description

PEDAL UNIT FOR BICYCLES OD. DGL.

The innovation relates to a bottom bracket unit according to the preamble of claim 1 claimed Art.

A bottom bracket unit for bicycles is already known in which the two roller bearings are inserted in one into the bicycle frame Sleeve are arranged, the outer ring of one bearing axially fixed and that of the other mounted axially displaceable and in which the axis itself is directly provided with the inner bearing ** raceways. - In this known embodiment it is especially proportionate with regard to the effort involved it is unfavorable that the roller bearings each have a separate outer ring.

The innovation now shows a structurally different design of a Bottom bracket unit, which is characterized by the features of the main claim. - With this configuration, a total Achieved inexpensively manufacturable bottom bracket unit.

Advantageous configurations of the bottom bracket unit according to the innovation are the subject of the subclaims.

The innovation is explained in more detail below with reference to two embodiments shown schematically in the drawing. It shows;

1 shows a pedal unit with a one-piece socket; Fig. 2 "* a pedal bearing unit with a multi-part socket,

In Fig. _K 1, 1 denotes a bushing for a bottom bracket unit, which surrounds the elements of the bottom bracket. The bottom bracket penetrating axis 2 has axially on one side a raceway for a Kugelrsihe 8> the bearing shell is directly molded into the sleeve 1 ,, Xn this area ttftgt the shaft 2 axially outside a Staübdeckel 5> softer in the Ettdbereicbv the bush 1 snapped and calibrate against a shoulder on axis 2. In this area, the axle 2 d £ H carries a chainring, not shown here. The second axial mounting of the axle 2 takes place by means of a screwed-on inner bearing cone 3 for a ball race 7 *, the outer bearing shell of which is provided in one piece in the socket 1. After adjustment, the bearing cone 3 is secured by a lock nut 4 on the threaded area of the axle 2.

The bushing 1 enclosing the above-mentioned elements has on the side of the chainring, that is, in the area of the bearing 8, an external thread I ¹ with a collar which can be screwed into the - not shown here - bottom bracket sleeve of the. Pgihr radrahme ns serves .. The axially other side of the socket 1 with the * Letgerung 7 is overlapped by a threaded bushing 6 after installation in the frame socket, which is screwed into the frame socket by means of an external thread 6 ¹ and in this way the socket 1 in the Frame sleeve fixes radially, - It can be very useful to design the end of the bushing 1 as a cone and correspondingly to design the overlapping threaded bushing 6 also conical in its inner diameter. With such a configuration, the bushing 1 and thus the bottom bracket unit as a whole: is clamped into the frame sleeve.

In Fig. 2, a partially differently designed bottom bracket unit is shown. In the case of an identically designed axis 2 with bearing 8 and axially right-hand dust cap 5 and left-hand bearing cone 3 with lock nut 4 to form a bearing 7, the enclosing bush 1 consists of individual elements.In the drawing, there is a metallic bearing shell la with an external thread I ^{1 on the} chainring side, and one on the left as well metallic bearing shell Ib can be seen, with both bearing shells la and Ib Mittelc of an axial

tubular intermediate piece lc connected to one another at a fixed distance are. The bearing shells la and Ib are expediently called cold ^ formed parts or as deep-drawn parts, while the Intermediate piece Ic made of light metal or similar stable • Can be made of plastic.

f - »Also in this embodiment of the sleeve 1 zütf Tretiäger @ unit
there is an overlapping threaded bushing 6, which is provided with an external thread 6 ¹ , is used for the bottom bracket unit
after screwing it into the side of the chainring
Now fix the frame sleeve radially from the other side. Here, too, it can be useful to provide the axial end of the bearing shell with an outer cone 9, with which

} 'l ■ n diameter correspondingly designed threaded bushing 6 a particularly safe radial tension of the bottom bracket unit in the frame * meninuffe is achieved.

22.10.1982
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Claims (1)

FICHTEL & si'CHS "Vg" - '' sCHWETNFURT -ANR 1 001 485 Reg.No. 12th »■ COMMERCIAL MASTER REGISTRATION UNO BOTTOM BRACKET FOR BICYCLES OD. DGL. PROTECTION CLAIMS 1. Bottom bracket unit for bicycles or the like with two bearings »the one that can be inserted into the socket of the bicycle frame are arranged and an axle provided with at least one bearing surface, characterized by the following in part per se known features: a) The Xugelreihen C7, 8) are in an O-arrangement; b) the bushing Cl. · contains at least one of the outer ball ₊ raceways; c) the socket (1) is formed at least in one piece; d) the bushing Cl) is on the chainring side in the one provided in the frame Sleeve screwed in such that both an axial and a radial fixing is achieved; e) the socket CD is axially overlapped on one side by a threaded socket C6), which accommodates the socket without play CD secures in the frame sleeve; f) the threaded bushing which can be connected on one side to the CD socket C6) also forms a seal for the bottom bracket unit . in the built-in area opposite the frame sleeves, tec * • · in the . -, 2 λ ββ »· Bottom bracket unit according to claim 1, dad, k. _S that the bush (1) is constructed in several parts, in such a way that the intermediate piece (Ic) enclosed by the running surfaces of the ball races (7, 8) is an unprocessed plastic, etc. Light metal molding is formed. 3. Trctlageinheit according to claim 1, dad. gek. that the socket (1) has an outer cone (9) axially on one side and the threaded bushing provided with a corresponding inner cone (6) Assault is. 22.10.1982
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