WO2019044119A1

WO2019044119A1 - Vehicle

Info

Publication number: WO2019044119A1
Application number: PCT/JP2018/022792
Authority: WO
Inventors: 武藤裕輔; 喜多深; 植田真悟; 荒木真; 森▲崎▼陽平
Original assignee: 本田技研工業株式会社
Priority date: 2017-08-31
Filing date: 2018-06-14
Publication date: 2019-03-07
Also published as: CN111051190B; DE112018004828T5; CN111051190A; JPWO2019044119A1; JP6823728B2; DE112018004828B4

Abstract

This vehicle (10) having rear wheels (26, 28) arranged on both left and right sides of the vehicle (10) has: a vehicle body frame (66) capable of pivoting about an axis extending in the front-rear direction of the vehicle; a pivot shaft (72) disposed on the vehicle body frame (66) and extending in the width direction of the vehicle (10); a first swing arm (74) supported at one end of the pivot shaft (72) so as to be capable of pivoting; a second swing arm (76) supported at the other end of the pivot shaft (72) so as to be capable of being pivoting; a first rear wheel (26) disposed on the first swing arm (74) behind the pivot shaft (72) in the front-rear direction of the vehicle; and a second rear wheel (28) disposed on the second swing arm (76) behind the pivot shaft (72) in the front-rear direction of the vehicle.

Description

vehicle

The present invention relates to a vehicle in which rear wheels are disposed on both left and right sides.

For example, JP-A-3-109190 discloses a vehicle in which rear wheels are disposed on the left and right sides. In this vehicle, pivot shafts extending in the longitudinal direction of the vehicle are respectively provided on the left and right sides of a rear frame extending in the longitudinal direction of the vehicle, and an arm portion pivotally supported by the pivot shaft A ring is supported. These rear wheels are direct drive type motor driven wheels in which a motor as a driving power source is incorporated between the shaft portion and the disk portion. That is, a so-called in-wheel motor is provided as a drive of the electric vehicle.

As described above, in a vehicle in which a pivot shaft is provided between the left and right rear wheels, a cushion that can be compressed and deformed according to the pivoting of the rear frame, the arm portion, and the arm portion between the left and right rear wheels Since a spring etc. are arrange | positioned, it is difficult to form the space which arrange | positions another structure. Therefore, it is difficult to provide a drive other than the in-wheel motor, and the degree of freedom in design of the vehicle is reduced.

The main object of the present invention is to provide a vehicle capable of increasing the degree of freedom in design.

According to one embodiment of the present invention, a vehicle having the following features is provided.

First feature: A vehicle having rear wheels disposed on both left and right sides, wherein the vehicle body frame is pivotable about the longitudinal direction of the vehicle, and the vehicle width direction of the vehicle disposed on the vehicle body frame A first swing arm pivotally supported by one of the pivot shafts, and a second swing arm pivotally supported by the other of the pivot shafts. A first rear wheel disposed on the first swing arm and disposed rearward of the pivot shaft in the vehicle longitudinal direction, and a second swing arm disposed on the second swing arm, the vehicle longitudinal direction from the pivot shaft And a second rear wheel disposed at the rear of the vehicle.

Second feature: between the first rear wheel and the second rear wheel, a first drive portion, and a first transmission portion for transmitting the driving force of the first drive portion to the first rear wheel A second drive unit and a second transmission unit for transmitting the driving force of the second drive unit to the second rear wheel are disposed.

Third feature: The rotation shafts of the first drive unit and the second drive unit are disposed above the rotation shafts of the first rear wheel and the second rear wheel.

Fourth feature; the vehicle body frame has an extending portion extending upward at the rear of the pivot shaft, and the extending portion is located in front of the first drive portion and the second drive portion Yes, they do not overlap in the vehicle side view.

A fifth feature; having a common pivot shaft disposed along the pivot axis and pivotally supporting the first swing arm and the second swing arm.

Sixth feature: the first rear wheel and the second rear wheel are flat tires.

Seventh feature: the first drive unit and the second drive unit are motors.

Eighth feature: A vehicle front frame rotatably connected to the vehicle body frame is provided in front of the vehicle body frame, and a battery for supplying power to the motor is fixed to the vehicle front frame.

According to the first feature of the vehicle according to the present invention, the first rear wheel and the second rear wheel are disposed rearward of the pivoting axis for supporting the first swing arm and the second swing arm in the vehicle longitudinal direction. Because of this, a space can be easily formed between the first rear wheel and the second rear wheel. As a result, the space between the first rear wheel and the second rear wheel can be effectively utilized, and the degree of freedom in vehicle design can be increased.

In addition, since the rotation axis extends in the vehicle width direction, unlike the case where the rotation axis extends in the front-rear direction of the vehicle, etc., the first swing arm and the second swing arm rotate in response to the first rear. It is possible to prevent the camber angle of the wheel and the second rear wheel from changing. This can improve the stability of the vehicle. Further, as described above, since it is possible to relieve the restriction on the curvature of the tread surface of the first rear wheel and the second rear wheel by the extent that the change of the camber angle can be avoided, the degree of freedom in vehicle design is further enhanced. It can be enhanced.

According to a second feature of the vehicle pertaining to the present invention, the first drive part, the first transmission part, the second drive part, and the like, effectively utilizing the space between the first rear wheel and the second rear wheel. A second transmission can be arranged. As described above, by arranging the first drive unit, the second drive unit, etc., which are relatively heavy, between the first rear wheel and the second rear wheel, the weight ratio at the center of the vehicle can be increased, Stability can be improved.

According to a third feature of the vehicle relating to the present invention, the rotational axes of the first rear wheel and the second rear wheel, and the rotational axes of the first drive portion and the second drive portion are vertically displaced. It becomes possible to make more efficient use of the space between the rear wheel and the second rear wheel.

According to the fourth feature of the vehicle according to the present invention, since the entire vehicle body frame including the extending part and the drive part do not overlap in a side view of the vehicle, it is easy to miniaturize the vehicle in the vehicle width direction.

According to the fifth aspect of the vehicle according to the present invention, since the first swing arm and the second swing arm are pivotally supported by one common pivot shaft, it is possible to reduce the number of parts.

According to the sixth aspect of the vehicle relating to the present invention, the ratio of the contact area of the tire can be increased, so that the stability of the vehicle can be improved.

According to the seventh aspect of the vehicle relating to the present invention, space saving can be achieved by using the first drive unit and the second drive unit as the motor.

According to the eighth aspect of the vehicle related to the present invention, by fixing the battery to the fixed vehicle front frame, the stability of the vehicle can be improved as compared to the case of fixing the battery to the rocking vehicle frame. It can be improved.

It is a principal part left view of a vehicle concerning this embodiment. It is a front view of the vehicle of FIG. It is a rear view of the vehicle of FIG. It is a top view of the vehicle of FIG. It is a bottom view of the vehicle of FIG. FIG. 2 is a left side perspective view of the vehicle of FIG. 1; It is a right side perspective view of the vehicle of FIG. It is a bottom side perspective view of the vehicle of FIG. It is a principal part perspective view explaining the battery holding | maintenance part of the vehicle of FIG. It is a principal part rear view of the vehicle of the vehicle of FIG. It is a disassembled perspective view of FIG. It is a front view of the 1st transmission part and the 2nd transmission part which were respectively accommodated in the 1st drive part and the 2nd drive part which were accommodated in the motor case on either side of the vehicle of FIG. 1, respectively, and the reduction gear case on either side. It is the figure which abbreviate | omitted illustration of the motor case of FIG. 12, and a reduction gear case.

A vehicle according to the present invention will be described in detail below with reference to preferred embodiments and with reference to the attached drawings.

FIG. 1 is a left side view of an essential part of a vehicle 10 according to the present embodiment. FIG. 2 is a front view of the vehicle 10. FIG. 3 is a rear view of the vehicle 10. FIG. 4 is a plan view of the vehicle 10. FIG. 5 is a bottom view of the vehicle 10. FIG. 6 is a left side perspective view of the vehicle 10. FIG. 7 is a right side perspective view of the vehicle 10. FIG. 8 is a bottom perspective view of the vehicle 10. FIG. 9 is a perspective view of an essential part for explaining the battery holding portion 12 of the vehicle 10. FIG. 10 is a perspective view of an essential part behind the vehicle 10, and FIG. 11 is an exploded perspective view of FIG.

FIG. 12 shows the first drive unit 16 and the second drive unit 18 accommodated in the left and

right motor cases

14L and 14R of the vehicle 10, and the first transmission unit 22 and the first transmission unit 22 accommodated in the left and right

reduction gear cases

20L and 20R, respectively. 10 is a front view of a second transmission unit 24. FIG. FIG. 13 is a view omitting illustration of the

motor cases

14L and 14R and the

reduction gear cases

20L and 20R of FIG. In addition, unless it demonstrates in particular, the direction of front and rear, right and left, and the up-and-down is explained on the basis of the direction seen from the driver who sat on vehicles 10. Moreover, in the vehicle 10, illustration of exterior parts, such as a front cowl and a seat cowl, is omitted.

As shown in FIGS. 1 to 8, the vehicle 10 includes a first drive unit 16 and a second drive unit 18, which are motors for the first rear wheel 26 and the second rear wheel 28 independently suspended on the left and right sides of the vehicle 10. This is a three-wheeled straddle-type vehicle that is driven to travel according to (see FIGS. 12 and 13).

In the vehicle 10, a head pipe 36 for pivotally supporting a steering stem 34 is attached to a front end portion of a main frame 32 constituting the vehicle front frame 30. A steering handle 38 is attached to the upper portion of the steering stem 34, and a front fork 42 for rotatably supporting the front wheel 40 is attached to the lower portion.

At the lower end portion of the main frame 32, a pair of left and right side frames 44L, 44R extending rearward while being separated from the main frame 32 on both the left and right sides in the vehicle width direction are connected. The rear end sides of the side frames 44L and 44R are curved toward the upper side of the vehicle and connected by a connecting pipe 46 extending in the vehicle width direction. The battery holder 12 is connected to the connection pipe 46.

As shown in FIG. 9, the battery holding unit 12 includes a front support 48, a lower support 50, a side support 52, and a pressing unit 54. In the front support portion 48, a pair of left and right extending portions 48aL and 48aR extending upward from the left and right end sides of the connection pipe 46 is provided at the center in the vehicle width direction via a curved portion 48b provided on the upper end side. It is connected integrally. In the lower support portion 50, a pair of left and right extending portions 50aL and 50aR extending rearward from the left and right end sides of the connection pipe 46 respectively is a center in the vehicle width direction via a curved portion 50b provided on the rear end side. Connected together.

The side support portions 52 are connected such that rear end (upper end) sides of a pair of left and right extending portions 52aL and 52aR that extend obliquely upward and rearward from both left and right end sides of the connecting pipe 46 extend in the vehicle width direction It is integrally connected via the part 52b. The pressing portion 54 extends in the horizontal direction between the front support portion 48 and the side support portion 52. A battery 56 for supplying power to the first drive unit 16 and the second drive unit 18 in a space surrounded by the front support portion 48, the lower support portion 50, the side support portions 52, and the pressing portion 54. Is held. In addition, a seat 58 (see FIG. 1 and the like) is disposed between the upper end portion of the front support portion 48 and the upper end portion of the side support portion 52. That is, the battery 56 is located below the seat 58.

Further, as shown in FIGS. 4 to 6, between the front end side and the rear end side of the side frames 44L, 44R, the front end portion of the rear vehicle support unit 62 is provided by a shaft member 60 extending in the vehicle width direction. It is supported. The rear body support unit 62 is suspended from the connection pipe 46 by a rigid bar 64 (see FIG. 1) located at the center in the vehicle width direction. As shown in FIGS. 10 and 11, a front end portion of a vehicle body frame 66 is pivotally supported around the axial direction of the vehicle body frame 66 at a rear end portion of the rear vehicle body support unit 62. Inside the rear body support unit 62, a knight-halt type damper (not shown) for providing a damper effect to the rotational movement of the front end portion of the body frame 66 is accommodated.

At the rear end side of the vehicle body frame 66, an extending portion 68 extending upward is provided. A rear frame 70 extending rearward is connected to the upper end of the extending portion 68. Further, between the front end portion of the vehicle body frame 66 and the extension portion 68, a pivot shaft 72 (see FIGS. 5, 10 and 11) extending in the vehicle width direction is disposed. The first swing arm 74 and the second swing arm 76 are pivotally supported by a single pivot shaft 78 disposed along the pivot shaft 72. That is, the first swing arm 74 is pivotally supported by one side (left side) of the pivot shaft 72, and the second swing arm 76 is pivotally supported by the other side (right side) of the pivot shaft 72. There is.

The first swing arm 74 obliquely extends upward and backward while being separated from the vehicle body frame 66 to the left in the vehicle width direction, and has an upper branch 74a and a lower branch 74b branched in the vertical direction at the rear end. It is provided. At the lower end of the lower branch portion 74b of the first swing arm 74, a first projecting shaft portion 80 projecting toward the center in the vehicle width direction is provided.

The second swing arm 76 obliquely extends upward and backward while being separated from the vehicle body frame 66 to the right in the vehicle width direction, and has an upper branch portion 76a and a lower branch portion 76b branched in the vertical direction at the rear end portion. It is provided. At the lower end of the lower branch portion 76b of the second swing arm 76, a second projecting shaft portion 82 projecting toward the center in the vehicle width direction is provided.

Each of the first projecting shaft portion 80 and the second projecting shaft portion 82 is attached to the lower end of a pair of left and right rear shock units 84. The upper end of the rear shock unit 84 is attached below the rear frame 70 of the vehicle body frame 66. Thus, the first swing arm 74 and the second swing arm 76 are suspended from the vehicle body frame 66 via the rear shock unit 84, respectively.

Further, on the rear end sides of the

upper branch portions

74a and 76a and the

lower branch portions

74b and 76b of the first swing arm 74 and the second swing arm 76, front end portions of left and right

reduction gear cases

20L and 20R, respectively. It is attached. The left reduction gear case 20L decelerates the output of the first drive portion 16 (see FIGS. 12 and 13) and accommodates a first transmission portion 22 that is a reduction gear that transmits the output to the first rear wheel 26. The right reduction gear case 20R decelerates the output of the second drive unit 18 and accommodates a second transmission unit 24 that is a reduction gear that transmits the output to the second rear wheel 28.

The center sides of the left and right

reduction gear cases

20L and 20R in the vehicle width direction are respectively connected to the outer sides in the vehicle width direction of the left and

right motor cases

14L and 14R accommodating the first drive unit 16 and the second drive unit 18 respectively. . The extension portion 68 of the vehicle body frame 66 is located in front of the first drive portion 16 and the second drive portion 18 and is disposed so as not to overlap in a vehicle side view.

As shown in FIG. 13, the first drive unit 16 includes a stator 86 having a stator coil disposed annularly, and a rotor (not shown) fixed to the output shaft 88 inside the stator 86. Thus, the rotational drive force of the first drive unit 16 can be transmitted to the output shaft 88.

The second drive unit 18 is also configured substantially the same as the first drive unit 16. That is, the second drive unit 18 includes a stator 90 and a rotor (not shown) fixed to the output shaft 92, and the rotational drive force of the second drive unit 18 can be transmitted to the output shaft 92. .

The first transmission portion 22 includes a first reduction gear 96 disposed below the output shaft 88 and a first reduction gear 96 disposed to mesh with a reduction gear 94 formed on the outer side of the output shaft 88 in the vehicle width direction. A second reduction gear that is disposed below the reduction shaft 98 so as to mesh with the reduction shaft 98 that is a rotation shaft and the reduction gear 100 formed on the reduction shaft 98 and that uses the axle 102 of the first rear wheel 26 as a rotation axis And a gear 104. The wheel 106 of the first rear wheel 26 is fixed to the outside of the axle 102 in the vehicle width direction so as to protrude from the reduction gear case 20L (see FIG. 12) (see FIG. 1 etc.).

The second transmission unit 24 is also configured substantially the same as the first transmission unit 22. That is, the second transmission unit 24 meshes with the first reduction gear 110 meshing with the reduction gear 108 formed on the output shaft 92 and the reduction gear 114 formed on the reduction shaft 112 of the first reduction gear 110 and And a second reduction gear 118 whose axis of rotation is the axle 116 of the rear wheel 28. The wheel 120 of the second rear wheel 28 is fixed to the vehicle width direction outer side of the axle 116 (see FIG. 7).

That is, the first drive portion 16 and the first transmission portion 22 are disposed between the first rear wheel 26 and the second rear wheel 28 which are disposed rearward of the pivot shaft 72 (pivot shaft 78) in the vehicle longitudinal direction. , The second drive unit 18, and the second transmission unit 24 are disposed. In addition, output shafts 88 and 92, which are rotation shafts of the first drive unit 16 and the second drive unit 18, are disposed above the

axles

102 and 116, which are rotation shafts of the first rear wheel 26 and the second rear wheel 28, respectively. It is done.

In the vehicle 10 basically configured as described above, the rotational drive forces of the first drive unit 16 and the second drive unit 18 obtained by the supply of power from the battery 56 are the output shafts 88 and 92, and It is transmitted to the

axles

102, 116 via the first reduction gears 96, 110, the reduction shafts 98, 112, and the second reduction gears 104, 118, respectively. By this, each of the first rear wheel 26 and the second rear wheel 28 can be driven to travel.

Next, the effects of the vehicle 10 according to the present embodiment will be described. In the vehicle 10, as described above, the first rear wheel 26 and the second rear wheel 28 are disposed rearward of the pivoting shaft 72 supporting the first swing arm 74 and the second swing arm 76 in the vehicle longitudinal direction. Because of this, a space can be easily formed between the first rear wheel 26 and the second rear wheel 28. As a result, the space between the first rear wheel 26 and the second rear wheel 28 can be effectively utilized, and the design freedom of the vehicle 10 can be enhanced.

In the vehicle 10, as described above, since the pivot shaft 72 extends in the vehicle width direction, unlike the case where the pivot shaft 72 extends in the front-rear direction of the vehicle 10, the first swing arm 74 and the second swing arm It is possible to avoid that the camber angles of the first rear wheel 26 and the second rear wheel 28 change in response to the rotation of 76. Thereby, the stability of the vehicle 10 can be improved. Further, since it is possible to alleviate the restriction on the curvature of the tread surface of the first rear wheel 26 and the second rear wheel 28 by the amount that can avoid the change of the camber angle, the design freedom of the vehicle 10 is further enhanced. be able to. For example, by using a flat tire as the first rear wheel 26 and the second rear wheel 28, the ratio of the contact area can be increased, so that the stability of the vehicle 10 can be improved.

In the vehicle 10, as described above, the space between the first rear wheel 26 and the second rear wheel 28 is effectively used to form the first drive unit 16, the first transmission unit 22, the second drive unit 18, the The 2 transmission part 24 can be arrange | positioned. Thus, by arranging the relatively large first drive unit 16 and the second drive unit 18 between the first rear wheel 26 and the second rear wheel 28, the weight ratio of the center of the vehicle 10 can be calculated. By increasing the size, the stability of the vehicle 10 can be improved.

In the vehicle 10, as described above, the output shaft that is the rotation shaft of the first drive unit 16 and the second drive unit 18 above the

axles

102 and 116 that are the rotation shafts of the first rear wheel 26 and the second rear wheel 28 88, 92 are arranged. As described above, the first rear wheel 26 and the second rear wheel 28 are vertically displaced from the rotational axes of the first drive unit 16 and the second drive unit 18 by vertically shifting the rotational axes of the first rear wheel 26 and the second rear wheel 28. The space between the two rear wheels 28 can be used more effectively.

In the vehicle 10, as described above, the entire vehicle body frame 66 including the extending portion 68, and the first drive portion 16 and the second drive portion 18 do not overlap in a side view of the vehicle, so the vehicle 10 is miniaturized in the vehicle width direction. Becomes easier.

In the vehicle 10, as described above, the first swing arm 74 and the second swing arm 76 are pivotally supported by one common pivot shaft 78, so the number of parts can be reduced.

In the vehicle 10, as described above, by using the first drive unit 16 and the second drive unit 18 as motors, it is possible to save space.

In the vehicle 10, as described above, by fixing the battery 56 to the fixed vehicle front frame 30, the stability of the vehicle 10 is improved as compared to the case where the battery 56 is fixed to the rocking vehicle body frame 66. It can be done.

As mentioned above, although the present invention was explained using a suitable embodiment, a technical scope of the present invention is not limited to a statement range of an above-mentioned embodiment. It is apparent to those skilled in the art that various changes or modifications can be added to the above-described embodiment. It is also apparent from the scope of the claims that the embodiments added with such alterations or improvements can be included in the technical scope of the present invention. Further, reference numerals in parentheses in the appended claims are added in accordance with the reference numerals in the attached drawings for the purpose of facilitating the understanding of the present invention, and the present invention relates to the elements attached with the reference numerals. It should not be interpreted as limited.

Claims

A vehicle (10) in which rear wheels (26, 28) are disposed on both left and right sides,
A vehicle body frame (66) rotatable about a longitudinal direction of the vehicle (10);
A pivot shaft (72) disposed on the body frame (66) and extending in the vehicle width direction of the vehicle (10);
A first swing arm (74) pivotally supported by one of the pivot shafts (72);
A second swing arm (76) pivotally supported by the other of the pivot shaft (72);
A first rear wheel (26) disposed on the first swing arm (74) and disposed rearward of the pivot shaft (72) in the vehicle front-rear direction;
A second rear wheel (28) disposed on the second swing arm (76) and disposed rearward of the pivot shaft (72) in the vehicle front-rear direction;
A vehicle (10) characterized by having:
In the vehicle (10) according to claim 1,
Between the first rear wheel (26) and the second rear wheel (28), the driving force of the first drive portion (16) and the first drive portion (16) 26) a second transmission unit for transmitting the driving force of the first transmission unit (22), the second drive unit (18), and the second drive unit (18) to the second rear wheel (28) A vehicle (10) characterized in that (24) is disposed.
In the vehicle (10) according to claim 2,
Respective rotations of the first drive unit (16) and the second drive unit (18) above the rotation shafts (102, 116) of the first rear wheel (26) and the second rear wheel (28) Vehicle (10) characterized in that the axes (88, 92) are arranged.
In the vehicle (10) according to claim 2 or 3,
The body frame (66) has an extending portion (68) extending upward at the rear of the pivot shaft (72), and the extending portion (68) corresponds to the first drive portion (16). And the second drive unit (18) in front of the vehicle, characterized in that they do not overlap in a vehicle side view.
In the vehicle (10) according to any one of claims 1 to 4,
Having a common pivot shaft (78) disposed along the pivot shaft (72) and pivotally supporting the first swing arm (74) and the second swing arm (76); Vehicles characterized by (10).
In the vehicle (10) according to any one of claims 1 to 5,
A vehicle (10) characterized in that the first rear wheel (26) and the second rear wheel (28) are flat tires.
In the vehicle (10) according to any one of claims 2 to 4,
A vehicle (10) characterized in that the first drive unit (16) and the second drive unit (18) are motors.
In the vehicle (10) according to claim 7,
A battery front frame (30) connected to the vehicle body frame (66) so as to be rotatable relative to the vehicle body frame (66) in front of the vehicle body frame (66) A vehicle (10) characterized in that (56) is fixed.