FR2590636A3 - Matching key coupling between a drive shaft and a hub, especially for driving rotary cutters of a motorized lawnmower - Google Patents

Matching key coupling between a drive shaft and a hub, especially for driving rotary cutters of a motorized lawnmower Download PDF

Info

Publication number
FR2590636A3
FR2590636A3 FR8609786A FR8609786A FR2590636A3 FR 2590636 A3 FR2590636 A3 FR 2590636A3 FR 8609786 A FR8609786 A FR 8609786A FR 8609786 A FR8609786 A FR 8609786A FR 2590636 A3 FR2590636 A3 FR 2590636A3
Authority
FR
France
Prior art keywords
hub
groove
key
drive shaft
motorized
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.)
Granted
Application number
FR8609786A
Other languages
French (fr)
Other versions
FR2590636B3 (en
Inventor
Manfred Klever
Karl-Heinz Rott
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.)
Gutbrod Werke GmbH
Original Assignee
Gutbrod Werke GmbH
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 Gutbrod Werke GmbH filed Critical Gutbrod Werke GmbH
Publication of FR2590636A3 publication Critical patent/FR2590636A3/en
Application granted granted Critical
Publication of FR2590636B3 publication Critical patent/FR2590636B3/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/67—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis hand-guided by a walking operator
    • A01D34/68—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis hand-guided by a walking operator with motor driven cutters or wheels
    • A01D34/6806—Driving mechanisms
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/73—Cutting apparatus
    • A01D34/733—Cutting-blade mounting 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
    • F16D1/0876—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with axial keys and no other radial clamping
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/67—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis hand-guided by a walking operator
    • A01D34/68—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis hand-guided by a walking operator with motor driven cutters or wheels
    • A01D34/6806—Driving mechanisms
    • A01D2034/6837—Drive connections
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D2101/00—Lawn-mowers

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Harvester Elements (AREA)

Abstract

Coupling comprising, in the drive shaft, a groove of predetermined standardized dimensions in which the matching key is inserted. According to the invention, the hub 5 is made from plastic and the depth of the groove 4 as well as the width of the matching key are increased relative to the standardized dimensions. The invention is particularly applicable to motorized lawnmowers.

Description

Accouplement à clavette ajustée entre un arbre d'entraînement et un moyeu, notamment pour l'entratnement des couteaux rotatifs d'une faucheuse à gazon à moteur.Adjusted key coupling between a drive shaft and a hub, in particular for driving the rotary knives of a motorized lawn mower.

La présente invention concerne un accouplement à clavette ajustée entre un arbre d'entraînement et un moyeu, notamment pour l'entrainement des couteaux rotatifs d'une faucheuse à gazon à moteur, comportant dans l'arbre d'entraînement une rainure de dimensions normalisées prédéterminées dans laquelle est insérée la clavette ajustée. I1 faut toujours tenir compte de ces conditions prédéterminées lorsque l'on doit commander à l'extérieur le moteur d'entraînement d'un appareil déterminé, ce qui est le cas général pour la fabrication d'appareils de jardinage entraînés par un moteur. La rainure côté arbre et la clavette ajustée livrées en même temps, généralement une clavette disque, plus rarement une clavette encastrée, qui sont établies, dans leurs dimensions normalisées, en sorte que le moyeu soit constitué par de l'acier. The present invention relates to a keyed coupling fitted between a drive shaft and a hub, in particular for driving the rotary knives of a powered lawn mower, comprising in the drive shaft a groove of predetermined standardized dimensions. in which the adjusted key is inserted. These predetermined conditions must always be taken into account when the drive motor of a given device has to be controlled from outside, which is the general case for the manufacture of gardening devices driven by a motor. The shaft side groove and the adjusted key delivered at the same time, generally a disc key, more rarely a recessed key, which are established, in their standardized dimensions, so that the hub is made of steel.

L'invention a pour objet de créer, en dépit de dimensions de clavette et de rainure côté arbre prédéterminées, certains degrés de liberté pour le choix du matériau du moyeu. Pour un moyeu constitué par une matière plastique, lequel offre des avantages de réduction de prix et de poids par rapport à une réalisation en acier, il est prévu selon l'invention d'augmenter par rapport aux dimensions normalisées la profondeur de la rainure côté moyeu ainsi que la largeur de la clavette ajustée. I1 en résulte la possibilité de s'en tenir, lors de la transmission de la force motrice, à la compression superficielle admissible du matériau que constitue la matiere plastique.Une augmentation de la longueur d'une clavette ajustée, par laquelle on pourrait également diminuer la compression superficielle spécifique, conduirait à l'obligation de placer à un écartement mutuel accru les parties d'appareil à accoupler entre elles. The object of the invention is to create, despite predetermined key and groove dimensions on the shaft side, certain degrees of freedom for the choice of the material of the hub. For a hub made of a plastic material, which offers advantages in terms of price and weight reduction compared to a steel construction, it is planned according to the invention to increase the depth of the groove on the hub side compared to the standardized dimensions. as well as the width of the adjusted key. This results in the possibility of adhering, during the transmission of the motive force, to the permissible surface compression of the material which constitutes the plastic material. An increase in the length of an adjusted key, by which one could also decrease the specific surface compression, would lead to the obligation to place at an increased mutual spacing the parts of apparatus to be coupled together.

Les moteurs à essence du commerce destinés à entraider des faucheuses à gazon à moteur sont livrés pour la plupart avec une rainure d'arbre creusée en arc de cercle pour accueillir une clavette disque. Dans le cadre de l'invention, cette clavette disque ajustée à la rainure côté arbre est établie en saillie d'une clavette encastrée d'une largeur correspondant à la profondeur de rainure du moyeu, c'est-à-dire qu'elle est formée de moulage sur une clavette ajustée qui remplit la rainure côté moyeu. Commercial gasoline engines intended to support motorized lawn mowers are delivered for the most part with a shaft groove hollowed out in an arc to accommodate a disc key. In the context of the invention, this key disc adjusted to the groove on the shaft side is projecting from a recessed key with a width corresponding to the groove depth of the hub, that is to say it is formed by molding on an adjusted key which fills the groove on the hub side.

Le moyeu en matiere plastique peut en principe être réalisé avec paroi pleine, mais il est bon pour des raisons d'économie de poids que le moyeu soit moulé par injection avec deux enveloppes cylindriques, l'une extérieure, l'autre intérieure, qui sont reliées entre elles par des entretoises radiales, deux entretoises parallèles formant entre elles la rainure côté moyeu. The plastic hub can in principle be made with a solid wall, but it is good for reasons of weight savings that the hub is injection molded with two cylindrical envelopes, one exterior and the other interior, which are connected together by radial spacers, two parallel spacers forming between them the hub side groove.

L'invention sera mieux comprise à l'aide de la description détaillée d'un mode de réalisation pris comme exemple non limitatif et illustré schématiquement par le dessin annexé, sur lequel
la figure 1 est une vue en perspective de l'extrémité d'un arbre d'entraînement de moteur avec une rainure d'arbre normalisée pour une clavette disque;
la figure 2 est une vue en pespective d'une clavette disque selon l'invention;
la figure 3 est une vue en perspective partielle d'un moyeu correspondant.The invention will be better understood using the detailed description of an embodiment taken as a nonlimiting example and illustrated schematically by the appended drawing, in which
Figure 1 is a perspective view of the end of a motor drive shaft with a standardized shaft groove for a disk key;
Figure 2 is a perspective view of a disk key according to the invention;
Figure 3 is a partial perspective view of a corresponding hub.

L'arbre d'entraînement 1 présente une rainure d'arbre normalisée 2 en forme d'arc de cercle pour accueillir une clavette disque 3a qui est enfoncée à la presse dans la rainure 2 avant que le moyeu soit emmanché. Afin d'augmenter les surfaces transmettant le couple de rotation du moteur, la clavette disque 3a est établie en saillie d'une clavette encastrée 3, laquelle saillie pénètre dans la rainure 4 de profondeur correspondante d'un moyeu 5 réalisé en tant que pièce moulée par injection de matière plastique. Le moyeu 5 constitue le moyeu à couteaux d'une faucheuse à gazon à moteur et présente une enveloppe cylindrique extérieure 6 et une enveloppe cylindrique extérieure 7 qui sont reliées entre elles par des entretoises radiales 8, 9, 10, 11 et 12. Les deux entretoises parallèles 11 et 12 forment entre elles la rainure approfondie 4 côté moyeu qui interrompt l'enveloppe cylindrique intérieure 7. Tandis que les surfaces transmettant la force entre la clavette disque saillante 3a en acier et la rainure 2 de l'arbre d'entraînement 1 également en acier sont calculées de façon suffisante quant à la compression superficielle admissible, la compression superficielle spécifique admissible plus basse de la matière plastique est respectée par les dimensions de largeur et de hauteur de la clavette encastrée 3 en liaison avec la rainure coté moyeu 4 dont la profondeur et la longueur sont établies en conséquence;  The drive shaft 1 has a standardized shaft groove 2 in the form of an arc of a circle to receive a disk key 3a which is pressed in the groove 2 before the hub is fitted. In order to increase the surfaces transmitting the torque of the motor, the disk key 3a is projecting from a recessed key 3, which projection penetrates into the groove 4 of corresponding depth of a hub 5 produced as a molded part. by plastic injection. The hub 5 constitutes the knife hub of a motorized lawn mower and has an outer cylindrical casing 6 and an outer cylindrical casing 7 which are connected together by radial spacers 8, 9, 10, 11 and 12. The two parallel spacers 11 and 12 form between them the deep groove 4 on the hub side which interrupts the inner cylindrical casing 7. While the force-transmitting surfaces between the protruding disk key 3a of steel and the groove 2 of the drive shaft 1 also in steel are sufficiently calculated as to the permissible surface compression, the lower specific permissible surface compression of the plastic material is respected by the width and height dimensions of the recessed key 3 in connection with the groove on the hub side 4 of which depth and length are established accordingly;

Claims (3)

REVENDICATIONS 1. Accouplement à clavette ajustée entre un arbre d'entraînement et un moyeu, notamment pour l'entraînement des couteaux rotatifs d'une faucheuse à gazon à moteur, comportant dans l'arbre d'entrat- nement une rainure de dimensions normalisées prédéterminées dans laquelle est insérée la clavette ajustée et caractérisé par le fait que le moyeu 5 est constitué par une matiere plastique et la profondeur de la rainure 4 ainsi que la largeur de la clavette ajustée 3, 3a sont augmentées par rapport aux dimensions normalisées. 1. Fitted key coupling between a drive shaft and a hub, in particular for driving the rotary knives of a powered lawn mower, comprising in the drive shaft a groove of predetermined standard dimensions in which is inserted the adjusted key and characterized in that the hub 5 is constituted by a plastic material and the depth of the groove 4 and the width of the adjusted key 3, 3a are increased compared to the standardized dimensions. 2. Accouplement selon la revendication 1, avec une rainure d'arbre creusée en arc de cercle pour accueillir une clavette disque, caractérisé par le fait que la clavette disque 3a est établie en saillie d'une clavette encastrée 3 d'une largeur correspondant à la profondeur de rainure du moyeu 5. 2. Coupling according to claim 1, with a shaft groove hollowed out in an arc of a circle to receive a disc key, characterized in that the disc key 3a is established projecting from a recessed key 3 with a width corresponding to the groove depth of the hub 5. 3. Accouplement selon la revendication 1 caractérisé par le fait que le moyeu 5 est réalisé en piece moulée par injection avec deux enveloppes cylindriques, l'une extérieure 6, l'autre intérieure 7, qui sont reliées entre elles par des entretoises radiales 8-12, deux entretoises parallèles 11, 12 formant entre elles la rainure 4 coté moyeu.  3. Coupling according to claim 1 characterized in that the hub 5 is produced as an injection molded part with two cylindrical envelopes, one exterior 6, the other interior 7, which are connected together by radial spacers 8- 12, two parallel spacers 11, 12 forming between them the groove 4 on the hub side.
FR8609786A 1985-11-23 1986-07-04 ADJUSTED KEY COUPLING BETWEEN A DRIVE SHAFT AND A HUB, ESPECIALLY FOR DRIVING THE ROTARY KNIVES OF A MOTOR LAWN MOWER Expired FR2590636B3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE8533015U DE8533015U1 (en) 1985-11-23 1985-11-23 Key connection between a drive shaft and a hub, especially for driving the rotating blades of a motorized lawnmower

Publications (2)

Publication Number Publication Date
FR2590636A3 true FR2590636A3 (en) 1987-05-29
FR2590636B3 FR2590636B3 (en) 1987-12-11

Family

ID=6787524

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8609786A Expired FR2590636B3 (en) 1985-11-23 1986-07-04 ADJUSTED KEY COUPLING BETWEEN A DRIVE SHAFT AND A HUB, ESPECIALLY FOR DRIVING THE ROTARY KNIVES OF A MOTOR LAWN MOWER

Country Status (2)

Country Link
DE (1) DE8533015U1 (en)
FR (1) FR2590636B3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4105557A1 (en) * 1991-02-22 1992-09-03 Wolf Geraete Gmbh Vertrieb KNIFE FASTENING FOR ELECTRIC LAWN MOWERS
DE202004021519U1 (en) * 2004-11-26 2009-02-19 Emre, Mehmet Key for non-rotatable connection of a shaft to a hub

Also Published As

Publication number Publication date
FR2590636B3 (en) 1987-12-11
DE8533015U1 (en) 1986-03-13

Similar Documents

Publication Publication Date Title
EP1350428A1 (en) Portable, motor-powered shears
US6679036B2 (en) Drive gear shaft structure of a self-moving type mower
FR2512495A1 (en) VIBRATION DAMPING DEVICE FOR GRASS MOWER AND THE LIKE
EP0784445A1 (en) Domestic appliance with a rotary cutting blade such as a mincer
FR2987298A1 (en) OSCILLATING ROTATING ELECTRIC TOOL
FR2590636A3 (en) Matching key coupling between a drive shaft and a hub, especially for driving rotary cutters of a motorized lawnmower
FR2822916A1 (en) TRANSMISSION MECHANISM HOUSING
FR2485127A1 (en) COUPLING SYSTEM FOR HOUSEHOLD APPLIANCES DRIVEN BY AN ELECTRIC MOTOR
FR2512897A1 (en) COUPLING DEVICE FOR TRANSMITTING TORQUE
FR2522753A1 (en) MOTOR WITH REDUCER WITH OUTPUT SHAFT WITH FEMALE PROFILE AND ASSOCIATED INSERTION PART
FR2499018A1 (en) ANTAGONIST TORQUE ROTOR FOR HELICOPTER
EP0920634B1 (en) Electromagnetic control motor device, particularly a ratio metre
WO2022018337A1 (en) Transmission housing, gearbox and wheeled vehicle provided with such a gearbox
FR2520466A1 (en) Plastics toothed pinion for belt drive - has retaining wings on opposing ends of adjacent grooves to guide belt
FR2666123A1 (en) ELECTRIC FUEL PUMP.
FR2558310A1 (en) BRUSH HOLDER FOR ELECTROMECHANICAL TRANSDUCER WITH FLAT COLLECTOR
FR2635152A3 (en) Plug-in connection for two shafts
FR2778215A1 (en) Shaft and hub arrangement for shaft drive to rotary grass cutter
JPS5855067Y2 (en) Front PTO extraction device for power agricultural machinery
FR2709795A1 (en) Non-permanent drive device for transmission reduction mechanism
FR2552723A1 (en) Gearing for windscreen wiper drive
CH310875A (en) Electric watch with motor balance.
FR2833674A1 (en) Shaft transmission system, especially for lawn mower, has reduction gear mechanism and clutch with hubs on reduction gear and output shaft
EP1227746B1 (en) Cable holder for electrical household food processor
FR2568966A1 (en) SYSTEM FOR CONSTRUCTING PULLEYS COMPOSED IN STAMPED SHEET COMPRISING SEVERAL MODULAR PULLEYS AND PULLEY OBTAINED

Legal Events

Date Code Title Description
ST Notification of lapse