ITVR20120124A1 - DEVICE TO MAINTAIN TRACTION ON BOTH FRONT AND REAR AXLES OF A TRACTOR IN THE DOUBLE CONFIGURATION ASSIGNED RESPECTIVELY WITH WHEELS OR ITS TRACKS ON THE REAR AXLE. - Google Patents
DEVICE TO MAINTAIN TRACTION ON BOTH FRONT AND REAR AXLES OF A TRACTOR IN THE DOUBLE CONFIGURATION ASSIGNED RESPECTIVELY WITH WHEELS OR ITS TRACKS ON THE REAR AXLE. Download PDFInfo
- Publication number
- ITVR20120124A1 ITVR20120124A1 IT000124A ITVR20120124A ITVR20120124A1 IT VR20120124 A1 ITVR20120124 A1 IT VR20120124A1 IT 000124 A IT000124 A IT 000124A IT VR20120124 A ITVR20120124 A IT VR20120124A IT VR20120124 A1 ITVR20120124 A1 IT VR20120124A1
- Authority
- IT
- Italy
- Prior art keywords
- wheels
- shaft
- rear axle
- tracks
- axle
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 claims description 17
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 230000013011 mating Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
- B60K17/08—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing of mechanical type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D55/00—Endless track vehicles
- B62D55/04—Endless track vehicles with tracks and alternative ground wheels, e.g. changeable from endless track vehicle into wheeled vehicle and vice versa
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- 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
- F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
- F16H3/08—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
- F16H3/087—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears
- F16H3/091—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears including a single countershaft
- F16H3/0915—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears including a single countershaft with coaxial input and output shafts
Description
DISPOSITIVO ATTO A MANTENERE LA TRAZIONE SU ENTRAMBI GLI ASSI ANTERIORE E POSTERIORE DI UN TRATTORE NELLA DOPPIA CONFIGURAZIONE ASSUNTA RISPETTIVAMENTE CON RUOTE OVVERO CINGOLI SULL'ASSE POSTERIORE. DEVICE TO MAINTAIN TRACTION ON BOTH FRONT AND REAR AXLE OF A TRACTOR IN THE DOUBLE CONFIGURATION ASSUMED RESPECTIVELY WITH WHEELS OR TRACKS ON THE REAR AXLE.
DESCRIZIONE DESCRIPTION
Il trovato si riferisce ad un dispositivo atto a mantenere la trazione su entrambi gli assi anteriore e posteriore di un trattore nella doppia configurazione assunta rispettivamente con ruote ovvero cingoli sull'asse posteriore. The invention relates to a device adapted to maintain traction on both the front and rear axles of a tractor in the double configuration assumed respectively with wheels or tracks on the rear axle.
E' noto che i trattori che presentano due ruote sull'asse anteriore e due ruote sull'asse posteriore possono cambiare configurazione con la sostituzione delle ruote sull'asse posteriore con cingoli. It is known that tractors which have two wheels on the front axle and two wheels on the rear axle can change configuration by replacing the wheels on the rear axle with tracks.
La trasmissione del moto dal motore ai detti assi à ̈ conformata in modo da non subire alcuna modifica nel cambio di configurazione, e così la velocità angolare degli alberi in uscita dalla trasmissione rispettivamente verso l'asse posteriore e verso l'asse anteriore non subisce variazioni durante il detto cambio. The transmission of the motion from the engine to the said axles is shaped so as not to undergo any change in the configuration change, and thus the angular speed of the shafts leaving the transmission respectively towards the rear axle and towards the front axle does not suffer variations during the said exchange.
La tecnica nota prevede che la trasmissione nel suo complesso realizzi la condizione per cui, nella configurazione che prevede la presenza di ruote sua sull'asse anteriore che sull'asse posteriore del trattore, la velocità periferica al suolo delle quattro ruote sia uguale con conseguente ottenimento di quattro ruote motrici. Quando si passa alla configurazione che prevede la presenza di cingoli sull'asse posteriore, con le velocità angolari degli alberi in uscita dalla trasmissione rispettivamente verso l'asse anteriore e verso l'asse posteriore che mantengono i valori assunti nella configurazione precedente, si verifica che, mentre la velocità periferica al suolo delle ruote anteriori mantiene il valore precedentemente assunto, la detta velocità relativa ai cingoli muta perché mutano le dimensioni delle ruote motrici dei cingoli stessi, e così si perde la possibilità di realizzare la contemporanea trazione sui due assi. The known technique provides that the transmission as a whole realizes the condition for which, in the configuration that provides for the presence of its wheels on the front axle and on the rear axle of the tractor, the peripheral speed on the ground of the four wheels is the same with consequent achievement of four-wheel drive. When switching to the configuration that provides for the presence of tracks on the rear axle, with the angular speeds of the shafts coming out of the transmission respectively towards the front axle and towards the rear axle which maintain the values assumed in the previous configuration, it is verified that , while the peripheral ground speed of the front wheels maintains the value previously assumed, the said speed relative to the tracks changes because the dimensions of the drive wheels of the tracks themselves change, and thus the possibility of achieving simultaneous traction on the two axes is lost .
Compito del presente trovato à ̈ allora quello di realizzare un dispositivo che rende possibile mantenere la trazione su entrambi gli assi di un trattore nelle due possibili configurazioni con ruote ovvero cingoli sull'asse posteriore. The aim of the present invention is therefore to provide a device which makes it possible to maintain traction on both axles of a tractor in the two possible configurations with wheels or tracks on the rear axle.
Il compito proposto viene raggiunto da un dispositivo atto a mantenere la trazione su entrambi gli assi anteriore e posteriore di un trattore nella doppia configurazione assunta rispettivamente con ruote ovvero cingoli sull'asse posteriore, secondo il trovato, caratterizzato dal fatto di comprendere le caratteristiche di cui alle rivendicazioni seguenti. The proposed aim is achieved by a device adapted to maintain traction on both the front and rear axles of a tractor in the double configuration assumed respectively with wheels or tracks on the rear axle, according to the invention, characterized by the fact that it includes the characteristics referred to to the following claims.
Ulteriori caratteristiche e vantaggi risulteranno maggiormente dalla descrizione di una forma di esecuzione preferita ma non esclusiva del trovato, illustrata a titolo indicativo e non limitativo negli ultimi disegni di cui: Further characteristics and advantages will become clearer from the description of a preferred but not exclusive embodiment of the invention, illustrated by way of non-limiting example in the latest drawings of which:
- le figure 1 e 2 rappresentano le due possibili configurazioni di un trattore secondo la tecnica nota; Figures 1 and 2 show the two possible configurations of a tractor according to the known art;
- le figure 3 e 4 rappresentano le due possibili configurazioni di un trattore dotato del dispositivo secondo il trovato; Figures 3 and 4 show the two possible configurations of a tractor equipped with the device according to the invention;
- le figure 5 e 6 rappresentano il dispositivo secondo il trovato nelle due possibili condizioni operative. Figures 5 and 6 show the device according to the invention in the two possible operating conditions.
Le figure da 1 a 4 rendono evidente il compito del dispositivo secondo il trovato che trova alloggiamento nella scatola indicata con 1 nelle figure 3 e 4 e nelle figure 5 e 6. Figures 1 to 4 show the task of the device according to the invention which is housed in the box indicated with 1 in Figures 3 and 4 and in Figures 5 and 6.
La figura 1 mostra la configurazione con due ruote associate all'asse anteriore 2a, e ruote 3 associate all'asse posteriore 3a; la figura 2 mostra invece la configurazione nella quale, ferma restando la presenza di ruote 2 anteriori, le ruote posteriori sono sostituite da cingoli 4. Figure 1 shows the configuration with two wheels associated with the front axle 2a, and wheels 3 associated with the rear axle 3a; figure 2 instead shows the configuration in which, without prejudice to the presence of front wheels 2, the rear wheels are replaced by tracks 4.
Come detto in precedenza, la trasmissione del moto dal motore 5 ai detti assi, comprendente un cambio indicato schematicamente con 6, à ̈ conformata in modo da non subire modifiche nel cambio di configurazione, e così la velocità angolare degli alberi in uscita dalla trasmissione rispettivamente verso l'asse posteriore, indicato con 7, e verso l'asse anteriore, indicato con 8, non subisce variazioni durante il detto cambio. As previously said, the transmission of motion from the engine 5 to the said axles, comprising a gearbox indicated schematically by 6, is shaped in such a way as not to undergo changes in the change of configuration, and thus the angular speed of the shafts leaving the transmission respectively towards the rear axle, indicated with 7, and towards the front axle, indicated with 8, it does not undergo variations during said gearbox.
La tecnica nota rappresentata nelle figure 1 e 2 prevede che si realizzi la condizione per cui la velocità periferica al suolo di tutte le ruote anteriori e posteriori sia pari a V, come mostrato nella figura 1, ottenendosi in tal modo la presenza di quattro ruote motrici. The known technique represented in Figures 1 and 2 provides for the condition that the peripheral speed on the ground of all the front and rear wheels is equal to V, as shown in Figure 1, thus obtaining the presence of four-wheel drive .
Quando però si passa alla configurazione di figura 2, mentre le ruote anteriori conservano velocità periferica al suolo pari ancora a V, la detta velocità del cingolo assume un valore V1 diverso da V come indicato nella detta figura 2 e come detto in precedenza, e conseguentemente si perde la possibilità di realizzare contemporanea trazione su due assi. However, when one passes to the configuration of figure 2, while the front wheels maintain a peripheral speed on the ground still equal to V, the said track speed assumes a value V1 different from V as indicated in said figure 2 and as previously mentioned, and consequently the possibility of achieving simultaneous traction on two axes is lost.
La situazione muta radicalmente con l'introduzione del dispositivo secondo il trovato, comprendente mezzi meccanici, contenuto, opportunamente, nella scatola 1, inserito sull'albero 8 di uscita della trasmissione dal motore 5 verso l'asse anteriore, grazie al quale si realizzano selettivamente a seguito di comando da parte dell'operatore due situazioni: una prima situazione, mostrata nella figura 3, nella quale si realizza una velocità periferica al suolo delle ruote anteriori 2 pari alla stessa velocità V di ruote posteriori 3, ed una seconda situazione, mostrata nella figura 4, nella quale la velocità periferica al suolo delle dette ruote anteriori 2 à ̈ pari alla stessa velocità V1 dei cingoli 4. The situation changes radically with the introduction of the device according to the invention, comprising mechanical means, suitably contained in the box 1, inserted on the output shaft 8 of the transmission from the engine 5 towards the front axle, thanks to which following a command by the operator two situations: a first situation, shown in figure 3, in which a peripheral ground speed of the front wheels 2 is achieved equal to the same speed V of the rear wheels 3, and a second situation, shown in figure 4, in which the peripheral ground speed of the said front wheels 2 is equal to the same speed V1 of the tracks 4.
Una forma di realizzazione del dispositivo contenuto nella scatola 1 Ã ̈ mostrata nella figura Detta forma di realizzazione comprende primi mezzi meccanici comprendenti i due semialberi 8a, 8b, inseriti coassiali in corrispondenza di una interruzione dell'albero 8 di uscita della trasmissione del moto dal motore all'asse anteriore, che potrebbe comprendere un albero dotato di giunti cardanici, e solidali con esso grazie ai giunti 8c, 8d. An embodiment of the device contained in the box 1 is shown in the figure Said embodiment comprises first mechanical means comprising the two half-shafts 8a, 8b, inserted coaxially in correspondence with an interruption of the output shaft 8 of the transmission of motion from the engine to the front axle, which could include a shaft equipped with cardan joints, and integral with it thanks to the joints 8c, 8d.
Vantaggiosamente, i detti semialberi 8a, 8b sono collegati mediante secondi mezzi meccanici atti a realizzare selettivamente una situazione in cui la velocità periferica al suolo delle ruote anteriori 2 à ̈ pari a quelle di ruote montate sull'asse posteriore, ed una situazione in cui la detta velocità delle ruote anteriori 2 à ̈ pari a quella di cingoli 4 montati sul detto asse posteriore. Advantageously, said half-shafts 8a, 8b are connected by second mechanical means capable of selectively achieving a situation in which the peripheral speed on the ground of the front wheels 2 is equal to those of wheels mounted on the rear axle, and a situation in which the said speed of the front wheels 2 is equal to that of tracks 4 mounted on said rear axle.
Opportunamente, il primo semialbero 8a, situato dalla parte della trasmissione, Ã ̈ dotato dell'ingranaggio 9 ad esso solidale, ed il secondo semialbero 8b, situato dalla parte dell'asse anteriore, Ã ̈ dotato dell'ingranaggio 10, folle per la presenza di rullini 8e, coniugati rispettivamente con gli ingranaggi 9a, 10a associati solidali all'alberino 11. Conveniently, the first half-shaft 8a, located on the transmission side, is equipped with the gear 9 integral with it, and the second half-shaft 8b, located on the front axle side, is equipped with the gear 10, idle due to the presence of rollers 8e, respectively mating with the associated gears 9a, 10a integral with the shaft 11.
Alle estremità affacciate dei due semialberi 8a, 8b sono presenti i due profili scanalati rispettivamente 12a, 12b coniugati con il manicotto mobile 13 che à ̈ dotato di mezzi, ad esempio costituiti da denti 14, 15, atti a renderlo solidale, penetrando in sedi 14a, 15a, con l'ingranaggio folle 10. At the facing ends of the two half-shafts 8a, 8b there are the two grooved profiles 12a, 12b respectively conjugated with the mobile sleeve 13 which is equipped with means, for example consisting of teeth 14, 15, suitable for making it integral, penetrating into the seats 14a , 15a, with the idler gear 10.
Il detto manicotto 13 Ã ̈ mobile assialmente, grazie ad azionamento da parte di un operatore sul codolo 13a, tra le due posizioni visibili rispettivamente nelle figure 5 e 6. Said sleeve 13 is axially movable, thanks to actuation by an operator on the shank 13a, between the two positions visible respectively in figures 5 and 6.
Nella posizione di figura 5 il manicotto 13 Ã ̈ impegnato in parte con il profilo scanalato 12a ed in parte con il profilo scanalato 12b; in tal modo i due semialberi 8a, 8b sono resi solidali, ed il moto viene trasmesso secondo le frecce della figura mentre l'ingranaggio folle 10 Ã ̈ trascinato in rotazione senza alcun effetto dagli ingranaggi 9, 9a, 10a. In the position of figure 5, the sleeve 13 is engaged in part with the grooved profile 12a and in part with the grooved profile 12b; in this way the two half-shafts 8a, 8b are made integral, and the motion is transmitted according to the arrows of the figure while the idle gear 10 is driven into rotation without any effect by the gears 9, 9a, 10a.
Nella posizione di figura 6 il manicotto 13 à ̈ impegnato integralmente con il profilo scanalato 12b ed à ̈ reso solidale con l'ingranaggio folle 10; in tal modo il moto entrato attraverso il semialbero 8a si trasmette, secondo le frecce in figura, fino all'ingranaggio 10 e da questi al manicotto 13 ed infine al profilo scanalato 12b sul semialbero 8b. In the position of figure 6, the sleeve 13 is integrally engaged with the grooved profile 12b and is made integral with the idle gear 10; in this way the motion entered through the half shaft 8a is transmitted, according to the arrows in the figure, to the gear 10 and from these to the sleeve 13 and finally to the grooved profile 12b on the half shaft 8b.
Nelle due posizioni delle figure 5 e 6 descritte del manicotto si realizzano valori del rapporto di trasmissione globale del moto dal motore all'asse anteriore tali da determinare rispettivamente le due situazioni di figura 3 e di figura 4. In the two positions of figures 5 and 6 described of the sleeve, values of the overall transmission ratio of the motion from the engine to the front axle are obtained such as to determine respectively the two situations of figure 3 and figure 4.
Il trovato descritto à ̈ suscettibile di numerose modifiche e varianti, tutte rientranti nell'ambito del concetto inventivo, e così ad esempio i semialberi 8a, 8b potranno essere collegati in modo qualsiasi. The described invention is susceptible of numerous modifications and variations, all of which are within the scope of the inventive concept, and thus for example the half-shafts 8a, 8b can be connected in any way.
Nella pratica realizzazione del trovato tutti i particolari potranno essere sostituiti con altri elementi tecnicamente equivalenti. In the practical embodiment of the invention, all the details can be replaced with other technically equivalent elements.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT000124A ITVR20120124A1 (en) | 2012-06-21 | 2012-06-21 | DEVICE TO MAINTAIN TRACTION ON BOTH FRONT AND REAR AXLES OF A TRACTOR IN THE DOUBLE CONFIGURATION ASSIGNED RESPECTIVELY WITH WHEELS OR ITS TRACKS ON THE REAR AXLE. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT000124A ITVR20120124A1 (en) | 2012-06-21 | 2012-06-21 | DEVICE TO MAINTAIN TRACTION ON BOTH FRONT AND REAR AXLES OF A TRACTOR IN THE DOUBLE CONFIGURATION ASSIGNED RESPECTIVELY WITH WHEELS OR ITS TRACKS ON THE REAR AXLE. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ITVR20120124A1 true ITVR20120124A1 (en) | 2013-12-22 |
Family
ID=46727494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT000124A ITVR20120124A1 (en) | 2012-06-21 | 2012-06-21 | DEVICE TO MAINTAIN TRACTION ON BOTH FRONT AND REAR AXLES OF A TRACTOR IN THE DOUBLE CONFIGURATION ASSIGNED RESPECTIVELY WITH WHEELS OR ITS TRACKS ON THE REAR AXLE. |
Country Status (1)
| Country | Link |
|---|---|
| IT (1) | ITVR20120124A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2019073A (en) * | 1931-12-30 | 1935-10-29 | White Motor Co | Clutch mechanism |
| US4019400A (en) * | 1974-12-16 | 1977-04-26 | Stump James M | Auxiliary two-speed transmission |
| JP2002316675A (en) * | 2001-04-20 | 2002-10-29 | Iseki & Co Ltd | Working vehicle |
| EP2036802A1 (en) * | 2007-09-11 | 2009-03-18 | CNH Italia S.p.A. | Vehicle, in particular a farm tractor, and relative assembly method |
| EP2360085A1 (en) * | 2010-02-24 | 2011-08-24 | Tidue S.R.L. | Tracked unit for a ground work vehicle |
-
2012
- 2012-06-21 IT IT000124A patent/ITVR20120124A1/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2019073A (en) * | 1931-12-30 | 1935-10-29 | White Motor Co | Clutch mechanism |
| US4019400A (en) * | 1974-12-16 | 1977-04-26 | Stump James M | Auxiliary two-speed transmission |
| JP2002316675A (en) * | 2001-04-20 | 2002-10-29 | Iseki & Co Ltd | Working vehicle |
| EP2036802A1 (en) * | 2007-09-11 | 2009-03-18 | CNH Italia S.p.A. | Vehicle, in particular a farm tractor, and relative assembly method |
| EP2360085A1 (en) * | 2010-02-24 | 2011-08-24 | Tidue S.R.L. | Tracked unit for a ground work vehicle |
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