Planetary gear

A planetary gearbox and sun gear technology, applied in gear transmission, gear lubrication/cooling, belt/chain/gear, etc., can solve problems such as imbalance

Active Publication Date: 2010-01-13
ZF FRIEDRICHSHAFEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gap also causes non-concentric operation, resulting in imbalance
For example, if a sliding sleeve with a typical weight of 1.6kg is moved only 0.1mm from the neutral position, the resulting imbalance would already amount to 160gmm, resulting in a severe imbalance

Method used

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  • Planetary gear

Examples

Experimental program
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Embodiment Construction

[0017] The single figure shows a partial sectional view of a planetary gearbox designed according to the invention, which is designed as a two-stage planetary gearbox and used on a machine tool.

[0018] The planetary gearbox has a drive shaft 1 connected to the sun gear 2 and a driven shaft 3 connected to the planet carrier 10 , wherein one of the planet gears is marked with 11 . The driven shaft also has an internal ring gear 4 , which is connected in a first connection position to the housing 12 of the planetary gearbox and in a second connection position with the sleeve 6 to the sun gear 2 . The sleeve 6 surrounds the transmission shaft 1 concentrically. The sliding sleeve, marked 5, produces a switching action between two connection positions. The sliding sleeve 5 is in this case mounted displaceably axially on the ring gear 4 .

[0019] In the upper half of the single figure is the sliding sleeve 5 which engages with the brake disc 14 , wherein this connecting position...

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PUM

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Abstract

The invention relates to a planetary gear, especially for machine tools, comprising a drive shaft which is connected to a sun wheel, a driven shaft which is connected to a planetary gear, and a hollow wheel which is connected to the housing in a first shift position, and to the sun wheel in a second shift position, also comprising a hub which surrounds the drive shaft in a concentric manner, and a sliding sleeve which also surrounds the hub in a concentric manner and is in contact with the hub when in a shift position. The sliding sleeve (5) has a centering diameter which is arranged in a concentric manner on the hub (6) on the end thereof oriented away from the hollow wheel (4). Said centering diameter overlaps with a centering band (8) which is embodied in a concentric manner on the axis of the hub when the sliding sleeve (5) comprising the hub (6) is in an engaged position.

Description

technical field [0001] The invention relates to a planetary gearbox, 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 A19917673 of the applicant discloses such a two-stage planetary gearbox with a drive shaft and a driven shaft supported in a housing by rolling bearings. The transmission shaft is connecte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H3/54F16D23/04F16H3/78F16H57/04F16H63/30
CPCF16H63/30F16H2200/0034F16H57/04B23Q5/142F16H3/54
Inventor 哈拉尔德·埃克特乌尔里希·路德维希·库切尔迈斯特埃克哈德·福斯特
Owner ZF FRIEDRICHSHAFEN AG
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