EP4522877A1 - A method and an apparatus to reduce shaft deformation - Google Patents

A method and an apparatus to reduce shaft deformation

Info

Publication number
EP4522877A1
EP4522877A1 EP22709561.9A EP22709561A EP4522877A1 EP 4522877 A1 EP4522877 A1 EP 4522877A1 EP 22709561 A EP22709561 A EP 22709561A EP 4522877 A1 EP4522877 A1 EP 4522877A1
Authority
EP
European Patent Office
Prior art keywords
shaft
auxiliary
working
working shaft
auxiliary shaft
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.)
Pending
Application number
EP22709561.9A
Other languages
German (de)
English (en)
French (fr)
Inventor
Karel Novotny
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.)
Czech Technical University In Prague
Original Assignee
Czech Technical University In Prague
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
Application filed by Czech Technical University In Prague filed Critical Czech Technical University In Prague
Publication of EP4522877A1 publication Critical patent/EP4522877A1/en
Pending legal-status Critical Current

Links

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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles
    • F16C3/023—Shafts; Axles made of several parts, e.g. by welding
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • 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
    • B23Q1/72—Auxiliary arrangements; Interconnections between auxiliary tables and movable machine elements
    • B23Q1/76—Steadies; Rests
    • 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
    • B23Q1/72—Auxiliary arrangements; Interconnections between auxiliary tables and movable machine elements
    • B23Q1/76—Steadies; Rests
    • B23Q1/763—Rotating steadies or rests
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/02—Bearings
    • F16C13/022—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/02—Bearings
    • F16C13/022—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle
    • F16C13/024—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle adjustable for positioning, e.g. radial movable bearings for controlling the deflection along the length of the roll mantle
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/02—Bearings
    • F16C13/022—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle
    • F16C13/024—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle adjustable for positioning, e.g. radial movable bearings for controlling the deflection along the length of the roll mantle
    • F16C13/026—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle adjustable for positioning, e.g. radial movable bearings for controlling the deflection along the length of the roll mantle by fluid pressure
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/02—Bearings
    • F16C13/022—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle
    • F16C13/024—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle adjustable for positioning, e.g. radial movable bearings for controlling the deflection along the length of the roll mantle
    • F16C13/026—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle adjustable for positioning, e.g. radial movable bearings for controlling the deflection along the length of the roll mantle by fluid pressure
    • F16C13/028—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle adjustable for positioning, e.g. radial movable bearings for controlling the deflection along the length of the roll mantle by fluid pressure with a plurality of supports along the length of the roll mantle, e.g. hydraulic jacks
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C39/00—Relieving load on bearings
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C39/00—Relieving load on bearings
    • F16C39/02—Relieving load on bearings using mechanical means
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C39/00—Relieving load on bearings
    • F16C39/04—Relieving load on bearings using hydraulic or pneumatic means
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C39/00—Relieving load on bearings
    • F16C39/06—Relieving load on bearings using magnetic means
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/20—Suppression of vibrations of rotating systems by favourable grouping or relative arrangements of the moving members of the system or systems
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D15/00—Control of mechanical force or stress; Control of mechanical pressure
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/22—Internal combustion engines
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/23—Gas turbine engines
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/42—Pumps with cylinders or pistons
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/43—Screw compressors

Definitions

  • the axis of the auxiliary shaft is coaxial or parallel or intersecting or skew to the axis of the working shaft.
  • the auxiliary shaft and the working shaft are optionally provided with mating gear wheels.
  • the auxiliary shaft is possibly counter-rotating to the working shaft.
  • FIG. 2 to 15 show an alternative shaft support according to the invention
  • Fig. 16 shows an example of the application of the invention
  • the actuator 3 removes or reduces the bending deformation of the working shaft 1 according to the deformation measurement, otherwise the inner bearing 10 would suffice located in the area of action of the external force load 12.
  • the use of the actuator 3 is primarily necessary due to the flexibility of the auxiliary shaft 2, the deformation of which must be measured and compensated by the actuator 3.
  • the actuator 3 is also used to improve the dynamic response of the working shaft 1 to a variable force load 12, e.g. damping the oscillation of the working shaft 1.
  • the inner bearing 10 connected to the actuator 3 can advantageously be replaced by a magnetic bearing which contains control of forces acting from the bearing on the shaft.
  • the deformation and damping of the vibration of the working shaft 1 is improved only by the use of internal bearings 10 located in the area of external force load 12. Bringing the auxiliary shaft 2 into the area of external force load 12 substantially replaces the needed support of the working shaft 1 with the frame 5, which, however, is inaccessible in this area of action of the external force load 12.
  • the actuator 3 connected to the inner bearing 10 makes it possible to increase the dynamic rigidity of the inner bearing 10.
  • the actuators 3 can be controlled drives, but also passive dampers or dampers connected to springs.
  • Drives can be electric, hydraulic, pneumatic, electromagnetic, magnetic, piezoelectric and others.
  • the fixed (immobile attached) hollow auxiliary shaft 2, inside which the working shaft 1 is located has the advantages that, without increasing the moment of inertia and increasing the requirements on balancing of the working shaft 1, the equivalent of good balance, high rigidity and little or no deformation of the working shaft 1 can be achieved.
  • the position sensors 6 and 7 of the shafts 1 and 2 can be laser beam sources and a CCD or PSD element.
  • the relative position sensors 8 of the working and auxiliary shafts 1 and 2 can be capacitive, eddy currents, magnetic, laser interferometers.
  • the movement sensors 9i of movement of working and auxiliary shafts 1 and 2 can be accelerometers.
  • Fig. 7 shows a solution by means by means of an auxiliary shaft 2 which is not coaxial but parallel to the working shaft 1.
  • the auxiliary shaft 2 acts on the working shaft 1 through co-engaging gears 13.
  • the actuator 3 acts on the outer bearing 4 on the auxiliary shaft 2, and thus acts on the auxiliary shaft 2, which acts on the working shaft 1 via the gears 13 and reduces its deformation and/or dampens its vibrations.
  • the external force load 12 acts outside the outer bearings 4 between the gear support 13 and the outer bearings 4.
  • the shafts 1 and 2 can be intersecting or skew with a suitable choice of the gear teeth of gears 13.
  • Fig. 11 shows a hollow auxiliary shaft 2 led out of the frame 5 into the area of action of an external force load 12, caused for example by an unbalanced rotor formed, maybe, by an aircraft propeller. From the hollow auxiliary shaft 2, the actuator 3 acts on the working shaft 1 by means of the inner bearing 10.
  • the auxiliary shaft 2 acts on the working shaft 1 through the gears 13 with a torsional torque from the drive 17, thus reducing the torsional deformation and/or vibration of the working shaft 1.
  • a position sensor 7 of the auxiliary shaft 2 relative to the frame 5 and a relative position sensor 8 of the working shaft 1 and the auxiliary shaft 2 are used.
  • the position sensors 7 and 8 measure the angular positions of the shafts about the axis 11 of rotation.
  • the drive 17 is controlled, which acts on the working shaft 1 via the auxiliary shaft 2 and the gears 13 and compensates by the torsional moment the torsional deformation of the working shaft 1 caused by the external torsion moment 12.
  • This solution can also be implemented in a manner similar to Fig. 2 with a hollow working shaft 1.
  • an inner bearing 10 with an actuator 3 is used here to reduce the bending deformation and/or vibration of the working shaft 1.
  • the working shaft 1 is subjected to an external force load 12 consisting of both a torsional moment and a bending force.
  • This solution can also be implemented in a manner similar to Fig. 2 with a hollow working shaft 1.
  • Fig. 14 shows an alternative to the solution of Fig. 11 in that the auxiliary shaft 2 is not coaxial but parallel to the working shaft 1.
  • the auxiliary shaft 2 can also be skew or intersecting to the working shaft 1.
  • a position sensor 6 of the working shaft 1 and a position sensor 7 of the auxiliary shaft 2 relative to the frame 5 are used.
  • the sensors measure the angular positions of the shafts about the axis 11 of rotation.
  • the auxiliary shaft 2 is also used to compensate for bending deformations and/or vibrations of the working shaft 1 by an outer bearing 4 with an actuator 3.
  • the position sensors 6 and 7 also measure the bending deformation of the shafts.
  • the drives 17 can be electric, hydraulic, pneumatic, electromagnetic, magnetic, piezoelectric and others.
  • Fig. 16 shows an aircraft 18 moving in a turn 19 about another axis of rotation 20 and the working shaft 1 of its propeller motors is equipped with the solution according to Fig. 9, which compensates for the gyroscopic effects acting on the working shaft L
  • the working shafts 1 and the auxiliary shafts 2 can be with full cross-section or hollow, movable or stationary (immovable), coaxial, parallel, intersecting, skew and there may be more auxiliary shafts.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Ocean & Marine Engineering (AREA)
  • Vibration Prevention Devices (AREA)
  • Support Of The Bearing (AREA)
EP22709561.9A 2022-01-13 2022-01-27 A method and an apparatus to reduce shaft deformation Pending EP4522877A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ2022-15A CZ309850B6 (cs) 2022-01-13 2022-01-13 Způsob snížení deformace pracovního hřídele a sestava pro jeho provádění
PCT/CZ2022/000003 WO2023134801A1 (en) 2022-01-13 2022-01-27 A method and an apparatus to reduce shaft deformation

Publications (1)

Publication Number Publication Date
EP4522877A1 true EP4522877A1 (en) 2025-03-19

Family

ID=80735547

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22709561.9A Pending EP4522877A1 (en) 2022-01-13 2022-01-27 A method and an apparatus to reduce shaft deformation

Country Status (3)

Country Link
EP (1) EP4522877A1 (cs)
CZ (1) CZ309850B6 (cs)
WO (1) WO2023134801A1 (cs)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025181814A1 (en) * 2024-02-27 2025-09-04 Tvs Motor Company Limited A drive assembly of a vehicle and a shaft member thereof

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3389450A (en) * 1966-05-20 1968-06-25 Mount Hope Machine Company Inc Non-deflecting roll
US5785636A (en) * 1995-10-12 1998-07-28 Beloit Technologies, Inc. Composite roll shell
US6361483B1 (en) * 1999-10-22 2002-03-26 Morrison Berkshire, Inc. System for controlling vibration of a dynamic surface
DE10290731D2 (de) * 2001-02-23 2004-05-06 Saurer Gmbh & Co Kg Walze zum Führen von zumindest einem Faden
DE10122648A1 (de) * 2001-05-10 2002-11-28 Voith Paper Patent Gmbh Biegeausgleichswalze
FI20012081A7 (fi) * 2001-10-26 2003-04-27 Metso Paper Inc Säädettävä rainamaisen materiaalin valmistuslaitteisto
DE102005035138A1 (de) * 2005-07-22 2007-01-25 Bielomatik Leuze Gmbh + Co.Kg Querschneider mit Schwingungsdämpfung
JP5708791B2 (ja) * 2011-03-29 2015-04-30 トヨタ自動車株式会社 車両の噛合歯車
US10800254B2 (en) * 2017-10-16 2020-10-13 Neapco Intellectual Property Holdings, Llc Driveline assembly for an electric vehicle
JP2020147174A (ja) * 2019-03-13 2020-09-17 トヨタ自動車株式会社 ハイブリッド車両の制振装置
CN213585310U (zh) * 2020-08-11 2021-06-29 揭阳市恒嘉达微型电机有限公司 一种高效防护的电机转子杆用辅助限位装置
CN112478148B (zh) * 2020-12-08 2022-07-22 苏州维格纳信息科技有限公司 风沙环境使用的带有旋翼导流耐磨结构的无人机

Also Published As

Publication number Publication date
CZ309850B6 (cs) 2023-12-13
WO2023134801A1 (en) 2023-07-20
CZ202215A3 (cs) 2023-07-26

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