Patent DE-19836168-A1 (DE)
Title: Motor-powered spinning spindle has a lower bearing housing at a base plate with the motor and a damper and electronic component group linked to a central control through a communication bus system
Inventor: MALINA LUDEK
IPC: D01H7/20
Filed: 1998-08-10
Abstract: Spindles (10) at a spinning machine each have their own motor (40). The motor rotor (34) is on a shaft (18) of the spindle, between an upper section (11) of the spindle and a bearing (46). The bearing unit has an upper (50) and lower (52) bearing, at the bottom of the shaft. The bearing assembly is supported on the spindle rail (74) through a damper (70) and an electronic component group (68).  The spindles (10) at a spinning machine each have their own motor (40). The motor rotor (34) in on a shaft (18) of the spindle, between an upper section (11) of the spindle and a bearing (46). The bearings (50,52) are centered by a bearing housing (48) on a base plate (54). The spindle has a lubricating system (55) with a wick at an oil sump, where a wick (60) is located between the sump (58) and an oil-absorbent store (62), passing between the spindle bearings (50,52). The oil store has an upper dispenser (64) and a lower dispenser (66) towards the bearings, where both dispensers are permeable to oil. The spindle rests on a damper (70,72) under the bearing housing. A head section (12) is at the upper section of the spindle, and a lower foot section (14) of the spindle takes the drive. The gap between the head and foot sections is taken up by a sleeve (13) round the spindle, to be wound with yarn. The sleeve is pushed over the spindle tube (16), concentric to the shaft. A tube (88) is at the ring frame (84), which passes round the spindle. The dimensions of the shaft and the components fitted to it are set so that, when the spindle is rotating at normal working speeds, it runs over the initial critic bending rotary speed.. The spindle motor is supplied with direct current (DC), with electronic commutation. The motor has a detector to register load shedding or under loading, a motor stop system, and a link to transmit a fault report to the central control through a communication bus. Each spindle motor has an address, to be accessed by the central control through the bus to register its operating condition. The bearings are preferably roller bearings as ball bearings, where the roller balls lie directly at the shaft. The base plate, under the bearing housing, acts as a housing for the oil sump (58). An under winding crown is at the foot section (14), with a lower sliding clamping sleeve (24) to clamp a yarn laid at the foot section. The clamping sleeve is moved against the force of a spring (26) in an axial direction on the spindle. The damper (72), as a rubber-elastic component, is below the motor housing (42) or base plate (54) for the bearing housing (48), or it is below the electronic component group (68) which is fitted under the bearing housing (48). The spindle is upright at a spindle rail (74) with two legs (76,78). One leg (76) is across the shaft (18) axis, and a second leg (78) is across the first leg, and at the level of the electronic component group (68). The second leg has a cover (80) to form a cable channel (82), with cable connections to the electronic component group (68). The electronic component group, for one or more spindles, has a frequency setter and switches to operate the spindle motors (40). A contactless switch, to operate the motor, is activated by remote control. The units which are coaxial to the shaft (18) are of deep-drawn plate or are castings. The tube (88) at the under side of the ring frame (84), to work with the spindle, has an inner diameter which is larger than the outer diameter of the motor. An upper end (11) of the shaft (18) is formed on the side of the rotor (34) away from the bearing housing (48), to hold a winding sleeve (13).