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Planetary gear

A planetary gear box, gear box technology, applied in the direction of gear transmission, gear lubrication/cooling, belt/chain/gear, etc., can solve the problems of friction corrosion, lack of lubrication of thrust bearing, unable to reach the sun gear all the way, to prevent The effect of frictional corrosion

Inactive Publication Date: 2006-11-29
ZF FRIEDRICHSHAFEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this is impossible for planetary gearboxes, because at high speeds due to the strong ventilation of the ring gear, the oil mist cannot reach the ring gear, that is, it cannot reach the sun gear all the way
Therefore lack of lubrication on the thrust bearing and also fretting corrosion

Method used

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  • Planetary gear

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Embodiment Construction

[0014] Since two-stage planetary gearboxes for machine tools are known to those skilled in the art, only the parts necessary for understanding the invention will be described below.

[0015] Use 1 to mark the transmission shaft 1 of the planetary gearbox, use 2 to mark the sun gear connected to it, use 3 to mark the driven shaft and use 4 to mark the planet carrier connected to it. 13 marks the oil inlet, which in the exemplary embodiment shown is located near the connection 19 of the sliding sleeve 11 in the bearing housing or in the gearbox housing. The oil inlet is connected to an oil pump (not shown) arranged outside the gearbox and is connected to the first outer bearing 5 of the driven shaft 3 via a pipeline 16 formed on the casing wall of the gearbox. The first outer bearing 5 is separated from the second inner bearing 6 by a piston ring 8 , wherein the piston ring 8 has channels. The channel can either be a small hole 15 formed parallel to the axis of the driven shaft...

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Abstract

The invention relates to a planetary gear, particularly for machine tools. Said planetary gear comprises a drive shaft, a driven shaft, which is mounted in the housing by means of a first external bearing and a second internal bearing, an axial bearing, an internal geared wheel, an axially displaceable sliding sleeve and a lubricating circuit. Said housing also comprises an oil inlet (13) which interacts with the first external bearing (5) of the drive shaft via the oil pipe (16). Said first external bearing is connected to the axial bearing (9) of the drive shaft by means of an oil feed circuit. The axial bearing (9) is connected to the internal geared wheel bearing by means of a cavity (17). Said cavity (17) is encapsulated by a wall part (18). An oil outlet (14) is connected to an oil pump, which is arranged outside of the planetary gear. Said oil pump is also connected to the oil inlet (13).

Description

technical field [0001] The invention relates to a planetary gearbox according to the preamble of claim 1 , in particular for machine tools. Background technique [0002] These planetary gearboxes, which are mostly designed as single-stage or multi-stage planetary gearboxes, are mainly used in machine tool drives as well as in turning, milling and machining centres. The connectable planetary gearbox increases the power bandwidth of the spindle motor to increase the flexibility of the machine tool through high torques or high speeds when machining different materials. For example, two transmission stages are formed by connecting the transmission shaft connected to the sun gear on the one hand to the ring gear and on the other hand the ring gear to the housing. The planet carrier is connected with the driven shaft. [0003] DE A 199 17 673 of the applicant discloses such a two-stage planetary gearbox with a drive shaft and a driven shaft supported in a housing by rolling bear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H57/04F16H3/54
CPCF16H57/0486F16H57/0471F16H3/54F16H57/043
Inventor 哈拉尔德·埃克特
Owner ZF FRIEDRICHSHAFEN AG
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