FR2634841A1 - Transmission for an agricultural implement of the rotary type - Google Patents

Transmission for an agricultural implement of the rotary type Download PDF

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Publication number
FR2634841A1
FR2634841A1 FR8910103A FR8910103A FR2634841A1 FR 2634841 A1 FR2634841 A1 FR 2634841A1 FR 8910103 A FR8910103 A FR 8910103A FR 8910103 A FR8910103 A FR 8910103A FR 2634841 A1 FR2634841 A1 FR 2634841A1
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FR
France
Prior art keywords
transmission
rotary
casing
shafts
cavities
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
FR8910103A
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French (fr)
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FR2634841B1 (en
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.)
Kubota Corp
Original Assignee
Kubota Corp
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 Kubota Corp filed Critical Kubota Corp
Publication of FR2634841A1 publication Critical patent/FR2634841A1/en
Application granted granted Critical
Publication of FR2634841B1 publication Critical patent/FR2634841B1/fr
Granted 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
    • F16H13/00—Gearing for conveying rotary motion with constant gear ratio by friction between rotary members
    • F16H13/06—Gearing for conveying rotary motion with constant gear ratio by friction between rotary members with members having orbital motion
    • F16H13/08—Gearing for conveying rotary motion with constant gear ratio by friction between rotary members with members having orbital motion with balls or with rollers acting in a similar manner
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B33/00—Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs
    • A01B33/08—Tools; Details, e.g. adaptations of transmissions or gearings
    • A01B33/082—Transmissions; Gearings; Power distribution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D51/00—Motor vehicles characterised by the driver not being seated
    • B62D51/004—Motor vehicles characterised by the driver not being seated characterised by the transmission
    • 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
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/221—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being located in sockets in one of the coupling parts

Abstract

The invention relates to a transmission for an agricultural implement of the rotary type. It relates to a transmission comprising a casing from which there extend two shafts 3 which carry coulters 5. The shafts 3 are inclined outwards and downwards. According to the invention, the shafts are driven by a common gear 7 which has hubs 7a which include cavities in which there are housed balls 12 which also penetrate into cavities 11 in the end of each rotary shaft 3. This transmission is very simple to mount. Application to motorised cultivators.

Description

La présente invention concerne une transmission pour instrument aratoire de type rotatif, et plus précisément une transmission ayant des arbres rotatifs inclinés. The present invention relates to a transmission for a rotary type rotary implement, and more specifically a transmission having inclined rotary shafts.

Le modèle d'utilité japonais ne 37-3350 décrit un exemple de transmission connue. Cette transmission comporte un arbre transversal ayant une position basse dans un carter rotatif et portant un pignon mené qui lui est fixé. The Japanese utility model no 37-3350 describes an example of known transmission. This transmission comprises a transverse shaft having a low position in a rotary casing and carrying a driven pinion which is fixed to it.

L'arbre transversal porte aussi des pignons coniques placés
ses extrémités opposées et qui sont en prise avec des pignons coniques montés aux extrémités internes d'arbres rotatifs inclinés.The transverse shaft also carries bevel gears placed
its opposite ends and which are engaged with bevel gears mounted at the internal ends of inclined rotary shafts.

La transmission précitée est destinée å éviter que de la terre reste sans être émiettée au-dessous du carter rotatif. Cependant, cpmme les arbres rotatifs sont entrainés aux extrémités opposées de l'arbre transversal, la transmission a des dimensions transversales importantes, â la partie inférieure du carter rotatif. En conséquence, pour qu'il ne reste pas de terre non émiettée, il faut utiliser des coutres de grande longueur, qui conduisent à la réalisation d'un appareil encombrant. En outre, les pignons coniques doivent être placés en prise avec une grande précision si bien que le travail de montage est délicat. The aforementioned transmission is intended to prevent soil from remaining without being crumbled below the rotary casing. However, as the rotary shafts are driven at the opposite ends of the transverse shaft, the transmission has large transverse dimensions, at the bottom of the rotary casing. Consequently, so that no uncrumbled earth remains, long coulters must be used, which lead to the production of a bulky device. In addition, the bevel gears must be precisely engaged so that the assembly work is delicate.

L'invention remédie aux inconvénients précités, et elle concerne une transmission pour instrument aratoire rotatif, qui est simple et dont le montage est facile. The invention overcomes the aforementioned drawbacks, and it relates to a transmission for rotary rotary instrument, which is simple and whose assembly is easy.

A cet effet, une transmission pour instrument aratoire rotatif selon l'invention comporte un carter, une roue de transmission supportée dans le carter par des pa liers, et des arbres rotatifs droit et gauche dépassant latéraiement et vers le bas, à partir des extrémités droites et gauches du carter, caractérisé en ce que chaque arbre rotatif a une extrémité qui dépasse dans un moyeu de le roue de transmission, un mécanisme à rotule étant disposé entre le moyeu et l'extrémité de chaque arbre rotatif afin que la force d'entraînement soit transmise de la roue de transmission à chaque arbre rotatif.  To this end, a transmission for a rotary tillage implement according to the invention comprises a housing, a transmission wheel supported in the housing by bearings, and right and left rotary shafts projecting laterally and downward from the right ends. and left side of the housing, characterized in that each rotary shaft has one end which protrudes into a hub of the transmission wheel, a ball joint mechanism being arranged between the hub and the end of each rotary shaft so that the driving force either transmitted from the transmission wheel to each rotating shaft.

Dans la construction précédente, chacun des arbres rotatifs est raccorde au moyeu de la roue de transmission, qui est par exemple un pignon, directement par le mécanisme à rotule, avec un recouvrement vertical dans une région de connexion. Cette transmission a donc des dimensions globalement réduites, en particulier dans la partie inférieure du carter. En conséquence, il ne reste pas de terre non émiettée sous le carter, même lorsque les coutres ont des longueurs réduites. In the previous construction, each of the rotary shafts is connected to the hub of the transmission wheel, which is for example a pinion, directly by the ball joint mechanism, with a vertical overlap in a connection region. This transmission therefore has overall reduced dimensions, in particular in the lower part of the casing. Consequently, no crumbled soil remains under the casing, even when the coulters have reduced lengths.

Dans un mode de réalisation préféré de l'invention, le mécanisme à rotule comporte des cavités de coopération délimitées dans le moyeu de la roue de transmission, des cavités de coopération délimitées à l'extrémité de chaque arbre rotatif, et des billes de transmission, de préférence formées d'acier, placées dans ces cavités. In a preferred embodiment of the invention, the ball-and-socket mechanism comprises cooperation cavities delimited in the hub of the transmission wheel, cooperation cavities delimited at the end of each rotary shaft, and transmission balls, preferably made of steel, placed in these cavities.

Ce mode de réalisation peut être monté simplement par glissement des billes d'acier dans les cavités du pignon et des arbres. Le montage est réalisé facilement en l'absence du mise en prise de pignons avec une précision élevée. This embodiment can be mounted simply by sliding the steel balls into the cavities of the pinion and the shafts. Assembly is easily accomplished in the absence of pinion engagement with high precision.

D'autres caractéristiques et avantages de l'invention seront mieux compris à la lecture de la description qui va suivre d'un exemple de réalisation, faite en référence aux dessins annexés sur lesquels
la figure l est une élévation latérale d'un cultivateur autopropulsé pour opérateur à pied, ayant une transmission d'instrument aratoire rotatif selon l'invention
la figure 2 est une élévation frontale de la transmission, en coupe partielle par un plan verticale ; et
la figure 3 est une coupe en élévation latérale d'un joint à rotule.Other characteristics and advantages of the invention will be better understood on reading the description which follows of an embodiment, made with reference to the accompanying drawings in which
FIG. 1 is a side elevation of a self-propelled cultivator for a walking operator, having a transmission of a rotary tillage implement according to the invention
Figure 2 is a front elevation of the transmission, in partial section through a vertical plane; and
Figure 3 is a sectional side view of a ball joint.

La figure 1 représente un cultivateur autopropulsé qui peut être dirigé par un opérateur à pied. L'appareil comporte un carter 101 de transmission dont dépasse un châssis avant 102 destiné à supporter un moteur 103 ayant un arbre transversal de sortie. Un mécanisme 104 de transmission à courroie est placé entre le moteur 103 et le carter 101 de transmission. Ce carter 101 loge une transmission de propulsion et une transmission de prise de force. Figure 1 shows a self-propelled cultivator which can be steered by a foot operator. The device comprises a transmission casing 101 of which projects beyond a front chassis 102 intended to support a motor 103 having a transverse output shaft. A belt transmission mechanism 104 is placed between the motor 103 and the transmission casing 101. This casing 101 houses a propulsion transmission and a PTO transmission.

Un carter 106 est fixé au carter 101 de transmission et loge une chaine de propulsion destinée à transmettre une force motrice à des roues 105 placées au contact du sol, au-dessous du carter 101 de transmission. Un instrument aratoire 1 de type rotatif est placé en arrière des roues 105 qui sont au contact du sol, et un carter rotatif 2 dépasse sous une carrosserie de véhicule. A housing 106 is fixed to the transmission housing 101 and houses a propulsion chain intended to transmit a driving force to wheels 105 placed in contact with the ground, below the transmission housing 101. A rotary type agricultural implement 1 is placed behind the wheels 105 which are in contact with the ground, and a rotary casing 2 protrudes under a vehicle body.

La figure 2 représente une transmission destinée à l'instrument aratoire de type rotatif 1. Comme représenté, les arbres rotatifs 3 dépassent à droite et à gauche d'un emplacement inférieur du carter 2. Chaque arbre rotatif 3 est raccordé à un arbre 4 qui porte plusieurs coutres 5 qui sont fixées à sa périphérie externe. FIG. 2 represents a transmission intended for the rotary type rotary implement 1. As shown, the rotary shafts 3 protrude to the right and left of a lower location of the casing 2. Each rotary shaft 3 is connected to a shaft 4 which carries several coulters 5 which are fixed to its external periphery.

Le carter 2 loge une chaîne 6 de transmission qui est entraînée à partir de la carrosserie du véhicule et qui transmet la force motrice à un pignon 7 placé à la partie inférieure du carter 2. Le pignon 7 est raccordé aux arbres rotatifs droit et gauche 3 par des joints à rotule respectifs 8. Les arbres rotatifs 3 et les arbres 4 de support des coutres sont inclinés afin qu'ils dépassent vers l'ex- térieur et vers le bas et ne laissent pas de sol non émietté. The casing 2 houses a transmission chain 6 which is driven from the vehicle body and which transmits the driving force to a pinion 7 placed at the bottom of the casing 2. The pinion 7 is connected to the right and left rotary shafts 3 by respective ball joints 8. The rotary shafts 3 and the coulter support shafts 4 are inclined so that they protrude outwards and downwards and do not leave any crumbled soil.

Les coutres 5 sont disposés de manière que les coutres internes soient les plus éloignées de l'axe de rotation afin qu'ils compensent l'irrégularité de profondeur de pénétration due à l'inclinaison des arbres 4. The coulters 5 are arranged so that the internal coulters are furthest from the axis of rotation so that they compensate for the irregularity of penetration depth due to the inclination of the shafts 4.

Le pignon 7 est supporté par le carter 2 par l'in termédiaire de deux paliers droit et gauche 9. Le pignon 7 a des moyeux tubulaires 7a qui délimitent chacun, comme représenté sur la figure 3, six cavités de coopération 10 équidistantes en direction circonférentielle. Chacun des arbres rotatifs 3 a une extrémité tubulaire interne 3a placée dans le carter 3, et cette extrémité a une configuration telle qu'elle délimite une surface périphérique sphérique avec six trous axiaux 11 de coopération régulie- rement espacés en direction circonférentielle. Six billes d'acier 12 de transmission de la force motrice sont logées dans les espaces délimités par les cavités 10 du pignon 7 et les trous 11 de coopération de chaque arbre 3, constituant un mécanisme 8 de joint à rotule. The pinion 7 is supported by the casing 2 by means of two right and left bearings 9. The pinion 7 has tubular hubs 7a which each delimit, as shown in FIG. 3, six cooperation cavities 10 equidistant in circumferential direction . Each of the rotary shafts 3 has an internal tubular end 3a placed in the casing 3, and this end has a configuration such that it delimits a spherical peripheral surface with six axial holes 11 of cooperation regularly spaced in circumferential direction. Six steel balls 12 for transmitting the driving force are housed in the spaces delimited by the cavities 10 of the pinion 7 and the holes 11 of cooperation of each shaft 3, constituting a ball joint mechanism 8.

Les billes d'acier 12 sont maintenues en position par contact avec un organe 13 de retenue en forme de disque placé à l'intérieur de l'extrémité tubulaire 3a de chaque arbre 3, et par contact avec chaque palier 9. De cette manière, une transmission efficace de la force motrice est assurée entre le pignon 7 et l'arbre rotatif 3. The steel balls 12 are held in position by contact with a disc-shaped retaining member 13 placed inside the tubular end 3a of each shaft 3, and by contact with each bearing 9. In this way, efficient transmission of the driving force is ensured between the pinion 7 and the rotary shaft 3.

Dans la construction précédente, les moyeux 7a du pignon 7 et les arbres rotatifs 3 sont montés de manière qu'ils se recouvrent. En conséquence, la transmission assurant le raccordement et la transmission de la force motrice entre le carter 2 et les arbres 3 peut avoir des dimensions transversales réduites. In the previous construction, the hubs 7a of the pinion 7 and the rotary shafts 3 are mounted so that they overlap. Consequently, the transmission ensuring the connection and the transmission of the driving force between the casing 2 and the shafts 3 may have reduced transverse dimensions.

En conséquence, cette construction ne laisse pas de terre non émiettée au-dessous du carter rotatif 2, même lorsque les coutres 5 ont des longueurs réduites. En conséquence, l'instrument aratoire de type rotatif a une configuration externe de dimension réduite et une construction simple. Consequently, this construction does not leave crumbled earth below the rotary casing 2, even when the coulters 5 have reduced lengths. As a result, the rotary type tillage implement has a reduced external configuration and simple construction.

Le montage peut etre réalisé facilement par glissement des billes d'acier 12 en position de coopération, avec introduction des arbres 3 dans les moyeux 7a du pignon 7. The assembly can be carried out easily by sliding the steel balls 12 into the cooperation position, with the introduction of the shafts 3 into the hubs 7a of the pinion 7.

Le nombre de billes d'acier 12 n'est pas limité à six mais peut être quelconque. The number of steel balls 12 is not limited to six but can be arbitrary.

Bien entendu, diverses modifications peuvent être apportées par l'homme de l'art aux transmissions qui viennent d'être décrites uniquement à titre d'exemples non limitatifs sans sortir du cadre de l'invention.  Of course, various modifications can be made by those skilled in the art to the transmissions which have just been described only by way of nonlimiting examples without departing from the scope of the invention.

Claims (4)

REVENDICATIONS caractérisée en ce que chaque arbre rotatif (3) a une extrémité qui pénètre dans un moyeu (7a) de la roue de transmission (7), un mécanisme (8) de joint à rotule étant placé entre le moyeu (7a) et l'extrémité de l'arbre rotatif (3) afin qu'il transmette une force motrice de la roue de transmission (7) à chaque arbre rotatif (3). characterized in that each rotary shaft (3) has one end which penetrates into a hub (7a) of the transmission wheel (7), a ball joint mechanism (8) being placed between the hub (7a) and the end of the rotary shaft (3) so that it transmits a driving force from the transmission wheel (7) to each rotary shaft (3). des arbres rotatifs droit et gauche (3) dépassant latéralement et vers le bas à partir des extrémités droite et gauche du carter (2), right and left rotary shafts (3) projecting laterally and downward from the right and left ends of the casing (2), une roue de transmission (7) supportée dans le carter (2) par des paliers (9), et a transmission wheel (7) supported in the casing (2) by bearings (9), and un carter (2), a housing (2), l. Transmission pour instrument aratoire de type rotatif, du type qui comprend l. Transmission for rotary type rotary implement, of the type which includes 2. Transmission selon la revendication 1, caractérisée en ce que le mécanisme (8) à joint à rotule comporte des cavités (10) de coopération délimitées dans le moyeu (7a) de la roue de transmission, des cavités (11) de coopération délimitées à l'extrémité de chaque arbre rotatif (3), et des billes (12) de transmission placées dans les cavités de coopération (10, 11). 2. Transmission according to claim 1, characterized in that the mechanism (8) with ball joint comprises cavities (10) defined cooperation in the hub (7a) of the transmission wheel, cavities (11) defined cooperation at the end of each rotary shaft (3), and transmission balls (12) placed in the cooperation cavities (10, 11). 3. Transmission selon l'une des revendications 1 et 2, caractérisée en ce que ladite extrémité de chaque arbre rotatif (3) a une forme tubulaire et comporte un organe de retenue (13) monté à l'intérieur et destiné à maintenir les billes (12) en position. 3. Transmission according to one of claims 1 and 2, characterized in that said end of each rotary shaft (3) has a tubular shape and comprises a retaining member (13) mounted inside and intended to hold the balls (12) in position. 4. Transmission selon l'une quelconque des revendications 1 à 3, caractérisée en ce que la roue de transmission (7) est un pignon.  4. Transmission according to any one of claims 1 to 3, characterized in that the transmission wheel (7) is a pinion.
FR8910103A 1988-07-26 1989-07-26 Transmission for an agricultural implement of the rotary type Granted FR2634841A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988099646U JPH076722Y2 (en) 1988-07-26 1988-07-26 Transmission structure of rotary tiller

Publications (2)

Publication Number Publication Date
FR2634841A1 true FR2634841A1 (en) 1990-02-02
FR2634841B1 FR2634841B1 (en) 1995-06-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR8910103A Granted FR2634841A1 (en) 1988-07-26 1989-07-26 Transmission for an agricultural implement of the rotary type

Country Status (3)

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JP (1) JPH076722Y2 (en)
KR (1) KR940004914B1 (en)
FR (1) FR2634841A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105850380A (en) * 2016-05-11 2016-08-17 广西五丰机械有限公司 Cutter set

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1830565A (en) * 1928-01-30 1931-11-03 Schaeffers Joseph Rotary plow
DE865223C (en) * 1944-07-01 1953-02-02 Porsche Kg Tiller driven by a tractor with a divided milling drum arranged symmetrically to the longitudinal axis of the tractor
FR1130095A (en) * 1954-05-10 1957-01-30 Rotary Hoes Ltd Cultivating machine with mechanical actuation
US4832657A (en) * 1987-09-08 1989-05-23 Gkn Automotive Inc. Constant velocity universal joint for transmitting a torque at various angles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1830565A (en) * 1928-01-30 1931-11-03 Schaeffers Joseph Rotary plow
DE865223C (en) * 1944-07-01 1953-02-02 Porsche Kg Tiller driven by a tractor with a divided milling drum arranged symmetrically to the longitudinal axis of the tractor
FR1130095A (en) * 1954-05-10 1957-01-30 Rotary Hoes Ltd Cultivating machine with mechanical actuation
US4832657A (en) * 1987-09-08 1989-05-23 Gkn Automotive Inc. Constant velocity universal joint for transmitting a torque at various angles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105850380A (en) * 2016-05-11 2016-08-17 广西五丰机械有限公司 Cutter set

Also Published As

Publication number Publication date
JPH076722Y2 (en) 1995-02-22
FR2634841B1 (en) 1995-06-23
JPH0220402U (en) 1990-02-09
KR900002009A (en) 1990-02-28
KR940004914B1 (en) 1994-06-04

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