US20070142160A1 - Machine tool gear mechanism - Google Patents

Machine tool gear mechanism Download PDF

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Publication number
US20070142160A1
US20070142160A1 US10/576,444 US57644404A US2007142160A1 US 20070142160 A1 US20070142160 A1 US 20070142160A1 US 57644404 A US57644404 A US 57644404A US 2007142160 A1 US2007142160 A1 US 2007142160A1
Authority
US
United States
Prior art keywords
spindle
transmission
pinion shaft
machine tool
bearings
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/576,444
Inventor
Harald Eckert
Ulrich Kuchelmeister
Eckhard Forster
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE2003148757 external-priority patent/DE10348757A1/en
Priority claimed from DE2003148755 external-priority patent/DE10348755A1/en
Priority claimed from DE200410003685 external-priority patent/DE102004003685A1/en
Priority claimed from DE200410003684 external-priority patent/DE102004003684A1/en
Application filed by ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Assigned to ZF FRIEDRICHSHAFEN AG reassignment ZF FRIEDRICHSHAFEN AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ECKERT, HARALD, FORSTER, ECKHARD, KUCHELMEISTER, ULRICH
Publication of US20070142160A1 publication Critical patent/US20070142160A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
    • F16H3/46—Gearings having only two central gears, connected by orbital gears
    • F16H3/48—Gearings having only two central gears, connected by orbital gears with single orbital gears or pairs of rigidly-connected orbital gears
    • F16H3/52—Gearings having only two central gears, connected by orbital gears with single orbital gears or pairs of rigidly-connected orbital gears comprising orbital spur gears
    • F16H3/54—Gearings having only two central gears, connected by orbital gears with single orbital gears or pairs of rigidly-connected orbital gears comprising orbital spur gears one of the central gears being internally toothed and the other externally toothed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/0009—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts
    • B23Q1/0018—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means
    • B23Q1/0027—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means between moving parts between which an uninterrupted energy-transfer connection is maintained
    • B23Q1/0036—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means between moving parts between which an uninterrupted energy-transfer connection is maintained one of those parts being a tool
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/003—Transmissions for multiple ratios characterised by the number of forward speeds
    • F16H2200/0034—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising two forward speeds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/44—Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product
    • Y10T408/45—Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product including Tool with duct
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/91—Machine frame
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/309352—Cutter spindle or spindle support
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/309352—Cutter spindle or spindle support
    • Y10T409/309408—Cutter spindle or spindle support with cutter holder
    • Y10T409/309464—Cutter spindle or spindle support with cutter holder and draw bar

Definitions

  • the present invention tackles this problem in a machine tool transmission, in particular in a specific spindle transmission with which the mentioned state of the art disadvantage is avoided.
  • the noise level of the transmission will be reduced by applying the invention; also any undesired vibration will be largely avoided.
  • the need for a belt or toothed gear drive for the spindle is avoided, so that the vibration and noise caused, the temperature increase caused by the belt friction, and the construction dependent rotational speed limitation, may be avoided.
  • a significant cost reduction may be further obtained through eliminating the belts, the belt pulleys or gears; for example, no additional gear lubrication or cooling is necessary in the drive.

Abstract

The machine tool transmission, in particular a spindle transmission, in which the force and torque transfer takes place directly from the pinion shaft (3) of the transmission (1) to the spindle, where the spindle is conveniently arranged in a coaxial configuration with the pinion shaft (3).

Description

  • This application is a national stage completion of PCT/EP2004/010886 filed Sep. 29, 2004 which claims priority from German Patent Application Serial No. 103 48 755.7 filed Oct. 21, 2003.
    • FIELD OF THE INVENTION
  • The present invention refers to a machine tool transmission, in particular to a spindle transmission.
    • BACKGROUND OF THE INVENTION
  • The current state of the art is transmissions that usually include a two level planetary transmission and corresponding switchgear arranged in a parallel axle to the spindle, whereby the power transfer to the spindle takes place through bands or gears. The use of gears for power transfer requires a high drive torque that endures the tensile strength and pretensed bands as well as a wide bearings foundation for the wide dimensioned belt pulleys. These will be further needed in the transmission drive cylinder roller bearings or similar ball bearings in which the belt force is high. However, larger ball bearings are used in unfavorable ways in limited applications of high rotational speeds. The ball bearings naturally show a radial slackness which results in an unbalanced and vibrating behavior in the planet carrier of the transmission. When a gear wheel transmission is used, additional axial forces exist in those gear wheels with beveled gearing in the transmission drive, which must also be absorbed. This solution shows the further disadvantage that as a result of the force transfer between the transmission and the spindle, the general noise level is too high.
    • SUMMARY OF THE INVENTION
  • The present invention tackles this problem in a machine tool transmission, in particular in a specific spindle transmission with which the mentioned state of the art disadvantage is avoided. In particular, the noise level of the transmission will be reduced by applying the invention; also any undesired vibration will be largely avoided.
  • In addition, the production costs will be reduced and the required space will be optimized.
  • According to this, a spindle transmission will be proposed in which the force and torque transfer from the transmission drive shaft to the spindle takes place directly, whereby the spindle is preferably arranged coaxially with the drive shaft.
  • Hereby the transmission drive shaft is directly connected with the spindle; the torque proof connection between the spindle and the drive shaft can take place from-closing or spring actuated. A connecting element can also be used between the spindle and the drive shaft.
  • According to a particularly beneficial embodiment of the invention, a drive shaft mounted over a short bearings housing, which the spindle drives. This results in the benefit that the entire length of the transmission is noticeably reduced.
  • The invention is suitable for mounting drive shafts over almost slack-free bearings, like for example beveled ball bearings, with which the torque may be transferred without vibrations to the spindle.
  • Through an invention-based conception, the need for a belt or toothed gear drive for the spindle is avoided, so that the vibration and noise caused, the temperature increase caused by the belt friction, and the construction dependent rotational speed limitation, may be avoided. A significant cost reduction may be further obtained through eliminating the belts, the belt pulleys or gears; for example, no additional gear lubrication or cooling is necessary in the drive.
  • Another benefit of the invention that can be mentioned is the significant oil loss reduction between the bearings, as a minimal oil quantity is required in this area.
  • In a convenient way, the drive requires no maintenance; in the current state of the art, transmissions require that the belts are either tensed or replaced. Furthermore, direct torque transfer eliminates false belts pretension force adjustments that may lead to damage the spindle bearings and to cause belt slippage as well. The spindle bearings useful life will be increased, as no shearing force will be effected over the spindle bearings by the belts, gears tangential and axial forces.
  • According to the invention, all the transmission components will be placed in a housing which makes the operation independent from any external influence. (For example, cooling fluid mist from the belts drive may cause belt slipping). Placing the components inside a housing increases the work safety, and there will be no free-spinning components in hand.
    • BRIEF DESCRIPTION OF THE DRAWING
  • The invention will be explained in further detail by means of the attached FIGURE, which consists of a schematic sectional view of a convenient embodiment of a transmission designed according to the present invention.
    • DETAILED DESCRIPTION OF THE INVENTION
  • It shows the planetary gear of a machine tool transmission, specifically in a spindle transmission with which the operator is familiar with, like the EP 1 169 582 B1 model of the applicant. A wide range of types of transmissions may be implemented.
  • The FIGURE shows a spindle transmission 1, which includes a drive shaft 2, a pinion shaft 3 and a two-level planetary gear located in the force flow between the drive shaft and the pinion shaft. The planetary gear shows a sun gear 4 connected with the drive shaft, a hollow gear 5 mounted on bearings 6 and a planetary carrier 7 with planet 8, which form the output of the planetary gear.
  • The sliding sleeve 9, selector fork 10 and braking disc 11 are intended for shifting the transmission; the shifting unit includes solenoid 12, which actuates gearshift 13 that is connected the selector fork 10. Hereby the sliding sleeve can be taken to a neutral position, to a first position in which the hollow gear 5 is coupled with the transmission housing 14 and a second position can be selected, in which the hollow gear 5 is connected with the sun gear 4.
  • The pinion shaft 3 will be mounted in the bearings housing 15 over the beveled ball bearings 16 and 17; therefore the torque may be transferred free of vibrations from the pinion shaft 3 to the spindle, making possible a direct connection of the pinion shaft 3 with the spindle and in consequence a coaxial and space-saving arrangement.
  • It is evident in each constructive development, in particular in each spatial configuration of the transmission components, that the shifting system and the shifting unit are technically significant to each other, under the scope of protection of the present claims without the transmission functions, as it is quoted in the claims, to influence also when these developments may not be explicit enough in the FIGURE or in the above given description.
    • REFERENCE SIGNS
    • 1 Machine tool transmission
    • 2 Drive shaft
    • 3 Pinion shaft
    • 4 Sun gear
    • 5 Hollow gear
    • 6 Hollow gear bearings
    • 7 Planetary gear
    • 8 Planet
    • 9 Sliding sleeve
    • 10 Selector fork
    • 11 Braking disc
    • 12 Solenoid
    • 13 Shifting level
    • 14 Transmission housing
    • 15 Bearings housing
    • 16 Beveled ball bearing
    • 17 Beveled ball bearing

Claims (6)

1-4. (canceled)
5. A machine tool transmission, for a spindle transmission, the transmission (1) comprising a pinion shaft (3) for transferring force and torque directly to a spindle, and the spindle is coaxial with the pinion shaft (3)
6. The machine tool transmission according to claim 5, wherein the transmission pinion shaft (3) is connected with the spindle, and the connection being a slip free connection which is formed by one of positively locking the pinion shaft (3) to the spindle, and by frictionally connecting the pinion shaft (3) to the spindle.
7. The machine tool transmission according to claim 5, wherein the pinion shaft (3) is mounted over a bearing housing (15) in order to reduce an overall length of the transmission (1).
8. The machine tool transmission according to claim 5, wherein the pinion shaft (3) is mounted on beveled ball bearings (16, 17).
9. A machine tool transmission, for a spindle transmission, the transmission (1) comprising a pinion shaft (3) for transferring force and torque directly to a spindle, the spindle being coaxial with the pinion shaft (3), the pinion shaft (3) communicating with the spindle by one of a slip free positive locking connection and a frictional connection, the pinion shaft (3) being mounted over a bearing housing (15) in order to reduce an overall length of the transmission (1) and the pinion shaft (3) being mounted on beveled ball bearings (16, 17).
US10/576,444 2003-10-21 2004-09-29 Machine tool gear mechanism Abandoned US20070142160A1 (en)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
DE2003148757 DE10348757A1 (en) 2003-10-21 2003-10-21 Planetary gear drive mechanism for machine tool has fixed housing with oil inlet connected to oil pump and supplying oil to output shaft bearings and planet- and ring-gear bearings
DE2003148755 DE10348755A1 (en) 2003-10-21 2003-10-21 Machine tool gear mechanism for transferring power and/or torque from a driven shaft of the gear mechanism to a spindle comprises an integrated rotary transmission leadthrough that serves as a supply device for coolants, oil or air
DE10348757.3 2003-10-21
DE10348755.7 2003-10-21
DE102004003684.5 2004-01-24
DE102004003685.3 2004-01-24
DE200410003685 DE102004003685A1 (en) 2004-01-24 2004-01-24 Machine tool gear mechanism for transferring power and/or torque from a driven shaft of the gear mechanism to a spindle comprises an integrated rotary transmission leadthrough that serves as a supply device for coolants, oil or air
DE200410003684 DE102004003684A1 (en) 2004-01-24 2004-01-24 Machine tool gear mechanism for transferring power and/or torque from a driven shaft directly onto a spindle comprises a spindle arranged coaxially to a driven shaft
PCT/EP2004/010886 WO2005049266A1 (en) 2003-10-21 2004-09-29 Machine tool gear mechanism

Publications (1)

Publication Number Publication Date
US20070142160A1 true US20070142160A1 (en) 2007-06-21

Family

ID=34623834

Family Applications (4)

Application Number Title Priority Date Filing Date
US10/576,444 Abandoned US20070142160A1 (en) 2003-10-21 2004-09-29 Machine tool gear mechanism
US10/573,668 Expired - Fee Related US7360977B2 (en) 2003-10-21 2004-09-29 Machine tool gear mechanism
US10/576,482 Active 2025-08-07 US7404779B2 (en) 2003-10-21 2004-09-29 Planetary gear
US10/576,443 Active US7445576B2 (en) 2003-10-21 2004-09-29 Planetary gear

Family Applications After (3)

Application Number Title Priority Date Filing Date
US10/573,668 Expired - Fee Related US7360977B2 (en) 2003-10-21 2004-09-29 Machine tool gear mechanism
US10/576,482 Active 2025-08-07 US7404779B2 (en) 2003-10-21 2004-09-29 Planetary gear
US10/576,443 Active US7445576B2 (en) 2003-10-21 2004-09-29 Planetary gear

Country Status (7)

Country Link
US (4) US20070142160A1 (en)
EP (4) EP1675704A1 (en)
JP (4) JP4772685B2 (en)
KR (1) KR101098617B1 (en)
DE (3) DE502004007084D1 (en)
ES (3) ES2307046T3 (en)
WO (4) WO2005050061A1 (en)

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WO2005050061A1 (en) 2005-06-02
JP2007509293A (en) 2007-04-12
EP1675703A1 (en) 2006-07-05
DE502004007086D1 (en) 2008-06-19
ES2307046T3 (en) 2008-11-16
WO2005049266A1 (en) 2005-06-02
DE502004007084D1 (en) 2008-06-19
EP1675704A1 (en) 2006-07-05
US20060270518A1 (en) 2006-11-30
US20070099744A1 (en) 2007-05-03
US20070032336A1 (en) 2007-02-08
JP2007508949A (en) 2007-04-12
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KR101098617B1 (en) 2011-12-23
JP4918362B2 (en) 2012-04-18
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JP2007508950A (en) 2007-04-12
US7360977B2 (en) 2008-04-22
DE502004006794D1 (en) 2008-05-21
US7404779B2 (en) 2008-07-29
WO2005050066A1 (en) 2005-06-02
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JP4772685B2 (en) 2011-09-14
JP2007508951A (en) 2007-04-12

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