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
  • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
  • F16H55/02—Toothed members; Worms
  • F16H55/08—Profiling
• • 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
  • F16H35/00—Gearings or mechanisms with other special functional features
• • 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
  • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
  • F16H55/02—Toothed members; Worms
  • F16H55/08—Profiling
  • F16H55/084—Non-circular rigid toothed member, e.g. elliptic gear
• • 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
  • Y10T74/00—Machine element or mechanism
  • Y10T74/15—Intermittent grip type mechanical movement
  • Y10T74/1503—Rotary to intermittent unidirectional motion
  • Y10T74/1508—Rotary crank or eccentric drive
  • Y10T74/1515—Rack and pinion transmitter
• • 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
  • Y10T74/00—Machine element or mechanism
  • Y10T74/18—Mechanical movements
  • Y10T74/18568—Reciprocating or oscillating to or from alternating rotary
  • Y10T74/1876—Reciprocating or oscillating to or from alternating rotary including inertia device
  • Y10T74/18768—Reciprocating or oscillating to or from alternating rotary including inertia device with rack and pinion
  • Y10T74/18776—Rectilinear rack
• • 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
  • Y10T74/00—Machine element or mechanism
  • Y10T74/18—Mechanical movements
  • Y10T74/18568—Reciprocating or oscillating to or from alternating rotary
  • Y10T74/188—Reciprocating or oscillating to or from alternating rotary including spur gear
  • Y10T74/18808—Reciprocating or oscillating to or from alternating rotary including spur gear with rack
• • 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
  • Y10T74/00—Machine element or mechanism
  • Y10T74/18—Mechanical movements
  • Y10T74/18568—Reciprocating or oscillating to or from alternating rotary
  • Y10T74/188—Reciprocating or oscillating to or from alternating rotary including spur gear
  • Y10T74/18808—Reciprocating or oscillating to or from alternating rotary including spur gear with rack
  • Y10T74/18816—Curvilinear rack
• • 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
  • Y10T74/00—Machine element or mechanism
  • Y10T74/18—Mechanical movements
  • Y10T74/18888—Reciprocating to or from oscillating
  • Y10T74/18976—Rack and pinion

Definitions

• the invention relates to a toothing arrangement with a fixed mink toothing and a gear wheel rolling on the fixed mink toothing with two toothed strips, the toothed wheel passing from one toothed strip to the other toothed strip during its rolling movement.
• the problem arises of moving the axis of a toothed wheel rolling off a toothed rack or an associated construction element along a trajectory with one or more break points.
• the trajectory is constant at the break points, but a tangent jump occurs.
• An example of such a trajectory is a triangle formed by two arcs that are curved in opposite directions.
• a rotary piston machine as described in DE 199 20 289 CI.
• a rotary piston is movable, the cross section of which is an oval of the second order.
• An output shaft extending centrally through the chamber serves to tap the movement of the rotary piston.
• the output shaft protrudes through an oval opening in the rotary piston and carries a pinion.
• the pinion engages with a mink tooth on the inside of the opening. The axis of the output shaft and thus the pinion runs through when the
• Rotary piston relative to the rotary piston a trajectory in the form of a Biangle.
• the invention has for its object to provide a toothing arrangement of the present type, in which the axis of a gear wheel rolling on the toothed strips can traverse a trajectory with an inflection point without jamming.
• this object is achieved in that, in order to produce a trajectory of the axis of the rolling gearwheel having a tangent jump at a break point, a transition toothing is provided between the toothed bars, which does not run smoothly to the toothed bars.
• the gear then rolls on one toothed rack. Its axis moves along an arm of the trajectory up to the break point. From here, the gear wheel would have to roll on the other toothed strip in such a way that the axis of the gear wheel is moved over the break point along another arm of the trajectory. On the one hand, the transition from one toothed rack to the other must happen at the moment. On the other hand, no clamping may occur. Such clamping occurs when the teeth in The area of the break point runs smoothly throughout. Then the toothing between the two toothed strips would have to be adapted to the circumference of the toothed wheel.
• the invention therefore provides a non-smooth transition between the toothed strips and the transition toothing. Then it can be achieved that the gear comes back into engagement with the other toothed strip immediately after leaving one toothed strip.
• the transitional toothing which is not smoothly connected and preferably arranged to form gaps, ensures that an engagement between rolling gearwheel and fixed toothing is always guaranteed.
• the gearwheel engages with one toothed rack and the transition toothing. In the next moment the gear wheel is in engagement with the transition toothing and the other toothed strip. There is thus a momentary transition from one toothed rack to another while the intervention is maintained.
• the trajectory has an inflection point.
• a recess is formed between the two toothed strips, which precludes the simultaneous contact of the gearwheel with both toothed strips.
• the transmission toothing can be formed by a tooth arch that is convex to the rolling gear.
• the gear wheel advantageously has a pitch circle that has a common tangent with the partial curves of the two toothed strips when the axis of the gear wheel is at the kink point of the trajectory, and the convex tooth arch has a pitch circle that matches the pitch circle of the gear wheel has a common tangent.
• the transfer teeth can also be a linear toothed rack.
• a linear rack can be viewed as a convex rack with an infinite radius of curvature.
• the gear disengages from the Ubertechnischsiereung the engagement with one rack immediately before it engages in the other rack.
• the partial curves of the two toothed strips can be concave-arc-shaped.
• Fig.l shows a gear wheel in the transition from engagement with a first arcuate toothed bar to engagement with a second arcuate toothed bar, the gear wheel being in engagement with a transition toothing and no longer engaged with the first toothed bar and just not yet engaged with the second toothed bar is.
• Fig.2 shows the toothing arrangement of Fig.l after the gear to
• Fig. 4 shows a convex transition toothing in a similar representation as
• FIG. 5 shows a toothing arrangement with a convex transition toothing and the trajectory through the axis of the gearwheel with an inflection point.
• Fig. 6 is a vector diagram for the speed of the axis of the gearwheel when passing the break point of the trajectory.
• 10 denotes a gear wheel.
• the gearwheel 10 is to roll on a toothing, which is generally designated 12, in such a way that its axis A passes through a singular trajectory 14.
• the trajectory 14 consists of two arcs 16 and 18 which form an inflection point 20.
• the circular arc 16 is curved around a center of curvature 22.
• the circular arc 18 is curved around a center of curvature 24.
• the toothing 12 has two concave toothed strips 26 and
• the toothed rack 26 is curved around the center of curvature 22. Its pitch circle radius is greater than the radius of curvature of the circular arc 16 by the pitch circle radius of the gear wheel 10.
• the toothed strip 28 is curved around the center of curvature 24. Its pitch circle radius is greater than the radius of curvature of the circular arc 18 by the pitch circle radius of the gearwheel 10. If the gearwheel
• the problem is the transition from the rack 26 to the rack 28.
• Toothed strip or transition toothing 30 corresponds to the tangent to the pitch circle 40 of the gearwheel 10.
• Transition toothing 30 is linear, ie not "bent" around the gear 10, there is no clamping.
• 3 is an enlarged view and shows the deviation of the partial line a - a of the transition toothing 30 from the pitch circle of the gear 10 more clearly.
• the toothing arrangement described thus allows a jamming-free and instantaneous transition of the gearwheel 10 from one toothed strip 26 to the other toothed strip 28, so that the axis A traverses a trajectory 14 with an inflection point 20. In this case, however, a drive connection between gear 10 and toothing and the transmission of torques is ensured at any moment via a tooth engagement.
• Fig. 4 shows a toothing arrangement similar to Fig.l to 3. Corresponding parts are provided with the same reference numerals as there. 4 is a convex instead of a linear transition toothing
• Transition toothing 42 is provided.
• the transition toothing 42 has a pitch circle 44.
• the pitch circle 40 of the gear 10 in its "kink point position has with the Pitch circle 44 a common tangent a - a.
• the tangent a - a is preferably parallel to the connection of the centers of curvature 22 and 24.
• the transfer teeth consist of a single tooth. It may be also possible that the transition toothing is concave if it has a sufficiently large radius of curvature.
• the physics of the axis guidance of a rolling gear around the break point 20 of the trajectory is essentially determined by the fact that the path of the axis or the center of gravity of the gear wheel in the break point 20 remains constant while its
• the speed of the axis A jumps immediately before the break point 20, namely V TR] , to the speed of the axis immediately after the break point V TR2 .
• the component of the speed before the jump V TM parallel to the line a - a is equal to the corresponding component after the jump V R1 .
• the component of the speed before the jump V TM perpendicular to the line a - a changes abruptly to the opposite component immediately after the break point V TM 2 . It is

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Transmission Devices (AREA)
• Gears, Cams (AREA)
• Gear Transmission (AREA)
• Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
• Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
• Connector Housings Or Holding Contact Members (AREA)
• Mechanical Operated Clutches (AREA)
• Lock And Its Accessories (AREA)
• Flexible Shafts (AREA)
• Valve-Gear Or Valve Arrangements (AREA)

Priority Applications (9)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

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Cited By (2)

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Citations (3)

Family Cites Families (10)

• 2001
  • 2001-08-09 DE DE10139285A patent/DE10139285A1/de not_active Withdrawn
• 2002
  • 2002-08-08 JP JP2003519290A patent/JP4208713B2/ja not_active Expired - Fee Related
  • 2002-08-08 WO PCT/EP2002/008897 patent/WO2003014598A1/de not_active Ceased
  • 2002-08-08 RU RU2004106791/11A patent/RU2289046C2/ru not_active IP Right Cessation
  • 2002-08-08 CN CNA028156552A patent/CN1541311A/zh active Pending
  • 2002-08-08 CA CA002455811A patent/CA2455811A1/en not_active Abandoned
  • 2002-08-08 IL IL16027602A patent/IL160276A0/xx unknown
  • 2002-08-08 KR KR1020047001754A patent/KR100876340B1/ko not_active Expired - Fee Related
  • 2002-08-08 DE DE50202791T patent/DE50202791D1/de not_active Expired - Lifetime
  • 2002-08-08 EP EP02767349A patent/EP1417428B8/de not_active Expired - Lifetime
  • 2002-08-08 AT AT02767349T patent/ATE293221T1/de active
  • 2002-08-08 MX MXPA04001236A patent/MXPA04001236A/es unknown
• 2004
  • 2004-02-05 US US10/773,086 patent/US6910397B2/en not_active Expired - Fee Related

Patent Citations (3)

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