Vehicle traction device and vehicle incorporating same

Abstract

Vehicle traction device, mainly for land vehicles, of the type comprising a motor and a transmission wherein the motor preferably has an axial rotation, such as an electric motor, wherein the motor rotation is coplanar and concurrent with the primary shaft of the transmission, and wherein the primary shaft is in turn coaxial to the output shaft, such that the output shaft crosses the primary shaft and extends beyond the ends thereof.

Claims

1. A vehicle traction device characterized in that it comprises: at least one motor located symmetrically between side vertical tubes of a vehicle frame; a transmission element comprising: a. a primary shaft coplanar and concurrent to a motor rotation shaft; b. engaging elements between the primary shaft and the motor rotation shaft wherein the two said shafts engage one another in a center zone of an axial extension of the primary shaft, c. an output shaft coaxial to the primary shaft; d. means for temporarily or permanently linking the rotation of the primary shaft and the output shaft; e. means for transmitting the rotation of the output shaft to the drive element of the vehicle.

2. The vehicle traction device to claim 1 characterized in that: the output shaft is independent of the primary shaft, wherein the output shaft crosses the primary shaft and extends beyond the ends thereof; and in that the vehicle traction device further comprises: at least one secondary shaft engaged to the primary shaft; means for engaging the primary shaft and the output shaft; means for engaging the secondary shaft and the output shaft.

3. The vehicle traction device according to claim 1 or 2, characterized in that it further comprises a swingarm shaft which is coaxial to the primary shaft and the output shaft.

4. The vehicle traction device according to claim 1 or 2, characterized in that the motor occupies a position above the transmission element.

5. The vehicle traction device according to claim 1 or 2, characterized in that the motor is electric.

6. The vehicle traction device according to claim 1 or 2, characterized in that it comprises a series of cooling fins arranged transversally to the rotation shaft of the motor.

7. A vehicle incorporating the traction device described in claim 1.

Description

BRIEF DESCRIPTION OF THE FIGURES

(1) FIG. 1 shows a perspective view of the traction system, which comprises a motor (1) and a transmission (9), wherein the rotation shaft (2) of the motor engages through engaging means (5) to the central zone of an axial extension of a primary shaft (3) which is coaxial to an output shaft (4), which transmits the force from the motor to the drive wheel or wheels through a pinion gear (6). It also shows a secondary shaft (7) permanently engaged to the primary shaft, as well as the cooling fins (13) transverse to the motor rotation shaft.

(2) FIG. 2 shows an elevation cross-section of the traction system, which comprises a motor (1) and a transmission (9), wherein the rotation shaft (2) of the motor engages through engaging means (5) to the central zone of an axial extension of a primary shaft (3) that is coaxial to an output shaft (4) which transmits the force of the motor to the drive wheel or wheels through a pinion gear (6). It also shows a secondary shaft (7) permanently engaged to the primary shaft.

(3) FIG. 3 shows the traction device installed in a two-wheel vehicle (8), enabling to see that the device allows an arrangement such that the motor (1) is housed above the transmission (9), leaving ample space for placing the batteries (10). The side vertical tubes (14) of the frame are also shown

(4) FIG. 4 shows an enlarged view of the device installed in a two-wheel vehicle where the batteries have been removed, revealing the motor (1) located symmetrically between the side tubes of the vehicle frame, with the cooling fins (13), the transmission (9) and the swingarm (11), which is coaxial to the primary shaft and the output shaft, not shown, showing the chain (12) that transmits the force from the pinion gear (6) of the output shaft, shown covered, to the drive wheel. The side vertical tubes (14) of the frame are also shown

(5) FIG. 5 shows an example of an embodiment of the device

(6) FIG. 6 shows an example of an embodiment of the device

(7) FIG. 7 shows an example of an embodiment of the device

(8) In FIGS. 5, 6 and 7 the cooling fins cover both the transmission and the motor itself.

DESCRIPTION OF AN EMBODIMENT OF THE INVENTION

(9) An embodiment of the invention is described below for purposes of illustration only and in a non-limiting sense.

(10) The vehicle traction device according to the embodiment proposed herein comprises: 1. An electric motor (1) symmetrically located between the vertical tubes of the frame of the vehicle, A transmission element (9) comprising a two-speed gearbox, which in turn comprises: A primary shaft (3) that is coplanar and concurrent with the rotation shaft (2) of the motor, wherein the motor (1) is arranged above the transmission element (9); An output shaft (4) coaxial to the aforementioned primary shaft (3), wherein the primary shaft (3) partially surrounds the output shaft (4); Both the primary (3) and output (4) shafts are in turn coaxial to the shaft of the swingarm (11) of the vehicle (11), which in this case is a two-wheel vehicle; Engaging elements to link, when applicable, the motion of the primary shaft to the output shaft; A secondary shaft (7) permanently engaged to the primary shaft (3); Elements for engaging, when applicable, the secondary shaft (7) to the output shaft (4); Elements, in this case a chain (12), for transmitting the movement of the output shaft (4), which incorporates a pinion gear (6), to the drive wheel, in this case the rear wheel.

(11) As stated above, the motor (1) is placed above the transmission element (9), freeing sufficient space in front to place the batteries.

(12) Making the output shaft (4) coaxial to the shaft of the swingarm (11) reduces load son the transmission elements, such as the chain (12), as the distance between the output shaft (4) and the axle of the drive wheel remains constant.

(13) With regard to gears, the gearbox operates as follows:

(14) In second gear, the primary shaft (3) and the output shaft (4) are engaged and turn together, while the secondary shaft (7) is engaged permanently to the primary shaft (3) and also turns but does not transmit its motion to any other shaft.

(15) In first gear the secondary shaft (7) engages the output shaft (4) which, before engaging the secondary shaft (7), is disengaged from the primary shaft (3).

(16) The differences in rotation speed between the shafts are achieved by a cascade of pinion gears and gearwheels.

(17) The shafts can be engaged and disengaged either automatically or manually; if it is done manually, it can be assisted by servomotor or by a mechanical shift.

(18) There are numerous other possible embodiments in addition to the one described. An example of one with regard to the arrangement of the motor is shown in FIGS. 5 to 7, and there are also many options regarding the type of vehicle incorporating it.

(19) To assist the cooling of the motor and the transmission, cooling fins (13) have been incorporated arranged transversally to the rotation shaft of the motor, such that the air passes easily through them aided by the motion of the vehicle.