JP2019189054A - Electric tricycle vehicle - Google Patents

Abstract

To provide an electric tricycle vehicle capable of reducing a load applied to a rocking mechanism part.SOLUTION: An electric tricycle vehicle 1 comprises a single front wheel, a pair of left-right rear wheels 3, a front vehicle body 10 for supporting the front wheel, a power unit 51 having a motor for driving the rear wheels 3, arranged between the pair of rear wheels 3 and supporting the pair of rear wheels 3 and a rocking mechanism part 53 for rockably connecting the front vehicle body 10 and the power unit 51 around the rolling axis R extending in the orthogonal direction to the vehicle width direction, vertically rockably provided to the front vehicle body 10, having an energization mechanism 92 for energizing the front vehicle body 10 in standing direction to the power unit 51 and overlapping at least a part with the rear wheels 3 when viewed from the vehicle width direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an electric three-wheeled vehicle.

  In the electric three-wheeled vehicle, the front vehicle body that supports the front wheels and the power unit that has a motor that drives the rear wheels and supports the rear wheels are separated from each other and connected to the power unit and the rear wheels by connecting with a swing shaft. Some have a front body that can be rolled. For example, Patent Document 1 discloses a swing shaft that extends in the front-rear direction through a substantially center of a vehicle body, and includes a swinging vehicle body that supports a seat and a rear vehicle body that supports a pair of left and right rear wheels via a rear wheel support member. An oscillating vehicle is disclosed that is connected so as to be relatively rotatable around the axis thereof. In this swing type vehicle, a movable bracket is supported by a fixed bracket that is supported by a rear portion of the swing vehicle body so as to be vertically slidable through a swing shaft, and a rear wheel is supported by the movable bracket. The power unit is supported.

Japanese Patent No. 3189777

  By the way, in the conventional electric three-wheeled vehicle, when the power unit and the rear wheel swing up and down with respect to the front vehicle body, a force in the bending direction acts on the swing mechanism unit that connects the front vehicle body and the power unit so as to be able to roll. Load. For this reason, the conventional electric three-wheeled vehicle has a problem of reducing the load applied to the swing mechanism.

  Therefore, the present invention provides an electric three-wheeled vehicle that can reduce the load applied to the swing mechanism portion.

  The electric three-wheeled vehicle according to the first aspect of the present invention includes a single front wheel (2), a pair of left and right rear wheels (3), a front vehicle body (10) that supports the front wheel (2), and the rear Power units (51, 251) having motors (61, 261A, 261B) for driving the wheels (3) and disposed between the pair of rear wheels (3) and supporting the pair of rear wheels (3) And the front vehicle body (10) and the power unit (51, 251) are swingably connected around a rolling axis (R) extending in a direction orthogonal to the vehicle width direction, and with respect to the front vehicle body (10) And an urging mechanism (92) for urging the front vehicle body (10) in the upright direction with respect to the power unit (51, 251), and at least a part of the urging mechanism (92) in the vehicle width direction. Swing mechanism (53, overlapping with the rear wheel (3) when viewed from the side And 53,353), characterized in that it comprises a.

  In the electric three-wheeled vehicle according to the second aspect of the present invention, the swing mechanism (53, 253, 353) is provided so as not to rotate about the rolling axis (R) with respect to the power unit (51, 251). First members (91, 291 and 391) and second members (90, 290 and 291) provided to be rotatable around the rolling axis (R) with respect to the first members (91, 291 and 391). 390), and the biasing mechanism (92) is interposed between the first member (91, 291 and 391) and the second member (90, 290 and 390), and the biasing mechanism At least a part of (92) overlaps with the rear wheel (3) when viewed from the vehicle width direction.

  In the electric three-wheeled vehicle according to the third aspect of the invention, the power unit (251) drives the first motor (261A) for driving the left rear wheel (3) and the right rear wheel (3). A second motor (261B), and the swing mechanism (253, 353) is disposed between the first motor (261A) and the second motor (261B). Features.

  In the electric three-wheeled vehicle according to the invention described in claim 4, the power unit (51) includes a differential mechanism (71) that distributes the driving force of the motor (61) to the pair of rear wheels (3). The pair of rear wheels (3) are provided coaxially with each other, and the motor (61) and the differential mechanism (71) are provided coaxially with the axle (78) of the pair of rear wheels (3). It is characterized by that.

  The electric three-wheeled vehicle according to a fifth aspect of the invention is characterized in that the swinging mechanism portion (53) overlaps the power unit (51) when viewed in the vertical direction.

  The electric three-wheeled vehicle according to the sixth aspect of the present invention further includes a cushion (4) connected to the front vehicle body (10) and the swing mechanism portion (53, 253, 353), and the swing mechanism portion ( 53, 253, 353) and the cushion (4) are connected to each other (98, 298) by overlapping the rear wheel (3) when viewed from the vehicle width direction.

  The electric three-wheeled vehicle according to the invention described in claim 7 is characterized in that the connecting portion (298) is provided vertically above the axle (267) of the pair of rear wheels (3).

  The electric three-wheeled vehicle according to an eighth aspect of the present invention further includes a battery holding portion (102) that holds a battery (105) that is a power source of the motor (61, 261A, 261B), and the battery holding portion (102 ) Is arranged in front of the rocking mechanism (53, 253, 353).

  The electric three-wheeled vehicle according to the invention described in claim 9 is characterized in that the battery holding part (102) is formed so that the battery (105) can be taken out from below the seat (12).

  In the electric three-wheeled vehicle according to the invention described in claim 10, the battery holding portion (102) is disposed below the seat (12), and the longitudinal direction of the battery (105) is along the horizontal direction. The battery (105) is held.

  According to the first aspect of the present invention, the swing mechanism portion and the ground contact point of the rear wheel can be brought closer to each other as compared with the configuration in which the swing mechanism portion does not overlap the rear wheel when viewed from the vehicle width direction. Thereby, when the rear wheel swings up and down with respect to the front vehicle body together with the power unit, the force in the bending direction acting on the swinging mechanism portion can be reduced. Therefore, it is possible to reduce the load applied to the swing mechanism part.

  According to the second aspect of the present invention, the urging mechanism can be brought closer to the ground contact point of the rear wheel as compared with a configuration in which the urging mechanism does not overlap the rear wheel when viewed from the vehicle width direction. For this reason, when the rear wheel swings up and down with respect to the front vehicle body together with the power unit, the force in the bending direction acting on the biasing mechanism via the first member can be reduced. Therefore, the load applied to the urging mechanism can be reduced.

  According to the third aspect of the present invention, the swing mechanism portion and the grounding point of the rear wheel can be brought closer to each other compared to a configuration in which the swing mechanism portion is not disposed between the first motor and the second motor. it can. Thereby, when the rear wheel swings up and down with respect to the front vehicle body together with the power unit, the force in the bending direction acting on the swinging mechanism portion can be reduced. Therefore, it is possible to reduce the load applied to the swing mechanism part.

  According to the invention described in claim 4, the outer shape of the power unit when viewed from the axial direction of the axle of the rear wheel, as compared with the configuration in which the motor and the differential mechanism are provided on a shaft different from the axle of the rear wheel. Can be reduced. For this reason, when the swing mechanism is moved closer to the power unit, when the rear wheel swings up and down with respect to the front vehicle body together with the power unit, the force in the bending direction acting on the swing mechanism can be reduced. Therefore, it is possible to reduce the load applied to the swing mechanism part.

  According to the invention described in claim 5, it is possible to bring the swing mechanism portion closer to the power unit. Therefore, when the rear wheel swings up and down with respect to the front vehicle body together with the power unit, the force in the bending direction acting on the swinging mechanism portion can be reduced. Therefore, it is possible to reduce the load applied to the swing mechanism part.

  According to the invention described in claim 6, the load of the front vehicle body is applied at a position near the ground contact point of the rear wheel in the swinging mechanism portion as compared with the configuration in which the connection portion does not overlap the rear wheel when viewed from the vehicle width direction. Can receive. Therefore, the shared load of the front and rear wheels can be optimized.

  According to the seventh aspect of the present invention, it is possible to receive the load of the front vehicle body at a portion of the swinging mechanism portion immediately above the ground contact point of the rear wheel. Therefore, the shared load of the front and rear wheels can be optimized.

  According to the eighth aspect of the present invention, the space generated in front of the swinging mechanism unit by effectively arranging the swinging mechanism unit so as to overlap the rear wheel when viewed from the vehicle width direction can be effectively used. Can do.

  According to the invention described in claim 9, the battery can be easily taken out to a low position in a state where an occupant or the like stands on the side of the vehicle. In addition, when a loading platform is provided behind the seat, the battery can be taken out without taking down articles mounted on the loading platform. Therefore, the usability of the electric three-wheel vehicle can be improved.

  According to the invention described in claim 10, it is possible to suppress the increase in the vertical dimension of the battery holding portion and to provide a space between the battery holding portion and the seat. As a result, it is possible to provide a storage space for storing articles under the seat and improve the usability of the electric three-wheeled vehicle.

It is a left view of the electric three-wheeled vehicle of 1st Embodiment. It is a left view which shows the rear part of the electric three-wheeled vehicle of 1st Embodiment. It is a bottom view which shows the rear part of the electric three-wheeled vehicle of 1st Embodiment. It is a figure which shows schematic structure of the power unit of 1st Embodiment. It is sectional drawing in the VV line | wire of FIG. It is a left view which shows the rear part of the electric three-wheeled vehicle of 2nd Embodiment. It is a bottom view which shows the rear part of the electric three-wheeled vehicle of 2nd Embodiment. It is sectional drawing in the VIII-VIII line of FIG. It is a bottom view which shows the rear part of the electric three-wheeled vehicle of the modification of 2nd Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the front-back, up-down, left-right directions are the same as the front-back, up-down, left-right directions. That is, the up-down direction matches the vertical direction, and the left-right direction matches the vehicle width direction. In the drawings used for the following description, the arrow UP indicates the upper side, the arrow FR indicates the front side, and the arrow LH indicates the left side. Moreover, in the following description, the same code | symbol is attached | subjected to the structure which has the same or similar function. And the description which overlaps those structures may be abbreviate | omitted.

[First Embodiment]
FIG. 1 is a left side view of the electric three-wheeled vehicle according to the first embodiment.
As shown in FIG. 1, the electric three-wheel vehicle 1 of the first embodiment includes a single front wheel 2, a pair of left and right rear wheels 3, a front vehicle body 10 that supports the front wheels 2 so as to be steerable, and a front vehicle body 10. The front vehicle body cover 30 that covers the vehicle body, the swing unit 50 that supports the pair of rear wheels 3 and that is connected to the front vehicle body 10 so as to swing up and down, and the motor 61 (see FIG. 4) that is the drive source And a rear cushion 4 (cushion) interposed between the front vehicle body 10 and the swing unit 50. The electric three-wheeled vehicle 1 can swing the front vehicle body 10 on which the occupant gets in the left-right direction (rolling motion) in a state where the pair of rear wheels 3 are grounded.

  The front vehicle body 10 includes a front wheel steering bar handle 11, an occupant seat 12, a low floor 13, a vehicle body frame 14 that forms the skeleton of the front vehicle body 10, and a front wheel suspension device 15 that suspends the front wheel 2. And comprising. A space 16 is formed between the bar handle 11 and the seat 12. The low floor 13 is disposed below the straddling space 16.

  The vehicle body frame 14 includes a head pipe 20 that is provided at a front end portion and tilts backward with respect to the vertical direction, a single front frame 21 that curves obliquely backward and downward from the rear side of the head pipe 20, and then curves backward. A pair of left and right lower frames 22 branching left and right from both sides of the curved portion of the front frame 21 and extending rearward, and a pair of left and right rear frames 23 curved and extended obliquely rearward and upward from the rear ends of the left and right lower frames 22 respectively. And a pair of left and right cargo bed frames 24 that extend from the rear end of the left and right rear frames 23 to bend backward. A front wheel suspension device 15 is pivotally supported on the head pipe 20 so as to be steerable. The bar handle 11 is fixed to the upper end portion of the stem pipe 25 that penetrates the head pipe 20 in the front wheel suspension device 15. The rear end portion of the front frame 21 is coupled to an intermediate portion of the lower cross pipe 27 that extends between the left and right lower frames 22.

  Pivot plates 28 are provided at the rear portions of the left and right lower frames 22. The pair of left and right pivot plates 28 respectively extend rearward from the rear portion of the lower frame 22. A swing unit 50 is connected to the pair of pivot plates 28 so as to be swingable up and down (details will be described later).

  The bar handle 11 is provided with a brake lever 45 adjacent to each of the pair of left and right grips. A rear brake cable (not shown) connected to the pair of left and right rear brakes 5 (see FIG. 3) is connected to the left brake lever 45 at the terminal portion. By operating the left brake lever 45, the rear brake cable is pulled and the pair of left and right rear brakes 5 are operated. The right brake lever 45 is connected to a front brake cable (both not shown) connected to the front brake at the end portion. By operating the right brake lever 45, the front brake cable is pulled to operate the front brake. A parking lock lever 46 is disposed near the bar handle 11. A parking lock cable (not shown) is connected to the parking lock lever 46. The end of the parking lock cable is connected to the rear brake 5. By operating the parking lock lever 46, the parking lock cable is pulled and the rear brake 5 is operated.

  The front body cover 30 includes a front cover 31 that covers the periphery of the head pipe 20 and the front frame 21 from the front, an inner cover 32 that covers the periphery of the head pipe 20 and the front frame 21 from the rear, and a rear of the lower end portion of the inner cover 32. The floorboard 33 is connected to the floorboard 33, the left and right floorside covers 34 are connected below the left and right edges of the floorboard 33, the left and right rear floors 35 are connected to the left and right rear of the floorboard 33, and the left and right rear floors 35 are raised. The lower seat cover 36, the left and right rear side covers 37 that extend diagonally upward and rearward of the rear ends of the left and right floor side covers 34 and cover the sides of the rear frame 23 and the loading frame 24, and the rear frames 23 of the left and right rear side covers 37. The battery box 102 (Fig. A battery box cover 38 which covers the reference) from the side, a.

  The front cover 31 and the inner cover 32 constitute a leg shield that covers the legs of the occupant from the front. The floor board 33 constitutes the low floor 13 together with the left and right lower frames 22. Between the left and right rear side covers 37, a loading platform 39 on which the article storage box 6 is mounted is provided. From the front end portion of the loading platform 39, a loading platform front wall portion 40 stands. A pair of left and right support columns 41 stands up above the loading platform front wall 40. A wind screen 42 stands from the upper end portion of the front cover 31. A roof 43 is installed between the upper end portion of the wind screen 42 and the upper end portions of the left and right support columns 41.

  The lower seat cover 36 is formed so that the battery 105 can be taken out from the battery box 102 arranged below the seat 12. For example, the lower seat cover 36 is formed so as to be able to be flipped up as indicated by a two-dot chain line in the drawing. Accordingly, the front vehicle body cover 30 can open the space below the seat 12 by flipping up the lower seat cover 36.

FIG. 2 is a left side view showing a rear portion of the electric three-wheeled vehicle according to the first embodiment. FIG. 3 is a bottom view showing a rear portion of the electric three-wheeled vehicle according to the first embodiment. 2 shows a state in which a part of the front vehicle body cover 30, the left rear wheel 3 and the like are removed.
As shown in FIGS. 2 and 3, the swing unit 50 includes a power unit 51 provided between a pair of rear wheels 3, a swing arm 52 supported by a pair of left and right pivot plates 28 so as to swing up and down, And a swinging mechanism portion 53 interposed between the power unit 51 and the swing arm 52.

FIG. 4 is a diagram illustrating a schematic configuration of the power unit according to the first embodiment.
As shown in FIG. 4, the power unit 51 supports a pair of rear wheels 3. The power unit 51 includes a unit case 60, a motor 61, a speed reduction mechanism 66, a differential mechanism 71, and a pair of left and right axles 78. The power unit 51 transmits the output of the motor 61 to the pair of axles 78 via the speed reduction mechanism 66 and the differential mechanism 71. The pair of axles 78 is the axle of the rear wheel 3. The left axle 78 is coupled to the left rear wheel 3. The right axle 78 is coupled to the right rear wheel 3. The pair of axles 78 are provided coaxially with each other. The pair of axles 78 extends in the left-right direction and is disposed with the shaft ends facing each other.

  The unit case 60 houses a motor 61, a speed reduction mechanism 66, and a differential mechanism 71. The unit case 60 is provided so as to project the axle 78 to the left and right sides. The unit case 60 supports a pair of axles 78 in a rotatable manner. In the following description, the case where the motor 61 is arranged in the left space inside the unit case 60 and the differential mechanism 71 is arranged in the right space from the motor 61 will be described as an example.

  The motor 61 drives the pair of rear wheels 3. The motor 61 is driven at a variable speed by, for example, VVVF (Variable Voltage Variable Frequency) control. The motor 61 is provided coaxially with the axle 78. The motor 61 includes a cylindrical stator 62 fixed to the unit case 60, a cylindrical rotor 63 coaxial with the stator 62 and disposed inside the stator 62, and a cylindrical shaft 64 coupled to the rotor 63. Prepare. The cylindrical shaft 64 is disposed coaxially with the axle 78 and is extrapolated to the left axle 78 so as to be relatively rotatable.

  The speed reduction mechanism 66 decelerates the drive rotation of the motor 61. The speed reduction mechanism 66 includes a gear 67 formed at the right end of the cylindrical shaft 64, and a large diameter gear 68 and a small diameter gear 69 supported by the unit case 60. The gear 67 and the large diameter gear 68 mesh with each other. The small diameter gear 69 is formed with a smaller diameter than the large diameter gear 68 and rotates integrally with the large diameter gear 68. In the reduction mechanism 66, the rotation of the cylindrical shaft 64 of the motor 61 is reduced by being transmitted to the small diameter gear 69 via the gear 67 and the large diameter gear 68.

  The differential mechanism 71 distributes the driving force of the motor 61 output via the speed reduction mechanism 66 to the left and right axles 78. The differential mechanism 71 is provided coaxially with the axle 78. The differential mechanism 71 includes a differential carrier 72, a pair of side gears 73, a shaft 74, and a pair of pinion gears 75. The differential carrier 72 is disposed so as to surround the shaft ends of the pair of axles 78 facing each other. The differential carrier 72 is externally attached to the axle 78 so as to be rotatable around the axis of the axle 78 with respect to the unit case 60. The differential carrier 72 is formed with a gear 76 that meshes with the small-diameter gear 69 of the speed reduction mechanism 66. As a result, the differential carrier 72 rotates in response to the output of the speed reduction mechanism 66.

  The pair of side gears 73 are bevel gears. The pair of side gears 73 are accommodated in the differential carrier 72. The pair of side gears 73 are fixed to shaft ends of the pair of axles 78 facing each other. The shaft 74 has an axis orthogonal to the axis of the axle 78. The shaft 74 is disposed between the pair of side gears 73, and both ends are supported by the differential carrier 72. The pair of pinion gears 75 are bevel gears that mesh with the pair of side gears 73, respectively. The pair of pinion gears 75 is sandwiched between the pair of side gears 73 and is rotatably supported by the shaft 74.

  In the differential mechanism 71, when the differential carrier 72 rotates in response to the output of the speed reduction mechanism 66, the shaft 74 rotates around the axis line of the axle 78. At this time, the pair of pinion gears 75 revolve around the axis of the axle 78. Here, when the resistance applied to the left and right axles 78 is equal, the pair of side gears 73 and the pair of axles 78 rotate at the same speed without the pair of pinion gears 75 revolving together with the shaft 74 rotating. When there is a difference in resistance applied to the left and right axles 78, the pair of pinion gears 75 rotate as appropriate to cause a difference in rotational speed between the pair of side gears 73 and the pair of axles 78. As described above, the differential mechanism 71 distributes the driving force of the motor 61 to the pair of rear wheels 3 via the axle 78.

  As shown in FIG. 3, a rear brake 5 is disposed between the power unit 51 and each rear wheel 3. For example, the rear brake 5 includes a brake drum formed integrally with the wheel of the rear wheel 3 and a brake shoe supported by the unit case 60 of the power unit 51. The brake shoe is configured to be in sliding contact with the brake drum by pulling at least one of a rear brake cable and a parking lock cable (both not shown).

  The swing arm 52 is disposed in front of the power unit 51. The swing arm 52 is supported by a pair of left and right pivot plates 28 so as to be rotatable about a pivot axis P extending in the left-right direction. The swing arm 52 includes a pair of left and right side arms 80 and a battery support portion 81 that is installed between the pair of side arms 80. The pair of side arms 80 are respectively supported by the pivot plate 28. The side arm 80 extends from a position in front of the pivot axis P to a position in the rear of the pivot axis P. For example, the side arm 80 extends horizontally from the pivot axis P toward the front, and extends slightly inclined downward from the pivot axis P toward the rear (see FIG. 2). For example, the pair of side arms 80 are bent or curved so that the distance between the side arms 80 is narrowed at the rear end portion. The battery support part 81 has an upper surface that extends horizontally, and supports the power supply part 100 from below. The battery support unit 81 covers at least a part of the power supply unit 100 from below.

  The swing mechanism 53 is fixed to the swing arm 52 at the front and is fixed to the power unit 51 at the rear. As a result, the swing mechanism 53, together with the power unit 51 and the swing arm 52, is provided so as to be swingable up and down with respect to the front vehicle body 10 (see FIG. 1). The swing mechanism 53 connects the front vehicle body 10 and the power unit 51 via a swing arm 52 so as to be swingable about a rolling axis R. The rolling axis R extends in a direction orthogonal to the left-right direction at the center of the vehicle body in the left-right direction. For example, the rolling axis R is orthogonal to the pivot axis P. The swing mechanism 53 includes a joint case 90 (second member) fixed to the swing arm 52, a joint shaft 91 (first member) fixed to the power unit 51 and rotatably supported by the joint case 90. And an urging mechanism 92 that imparts a damper effect to the relative rotation of the joint case 90 and the joint shaft 91, and a lock mechanism 93 that can restrain the relative rotation of the joint case 90 and the joint shaft 91. Here, the urging mechanism specifically refers to a Knighthard rubber spring, a torsion coil spring, a torsion bar, and the like, and various means can be used as long as the oscillating mechanism is urged in the standing direction. I can do it. Moreover, in this embodiment, the case where a knight hart rubber spring is used is illustrated, and is hereinafter referred to as knight hart for simplification.

  As shown in FIG. 2, at least a part of the swing mechanism 53 overlaps the rear wheel 3 when viewed from the left-right direction. Specifically, at least a part of the portion of the swinging mechanism portion 53 where the joint case 90 and the joint shaft 91 overlap when viewed from the direction orthogonal to the rolling axis R overlaps with the rear wheel 3 when viewed from the left-right direction. Yes.

  The joint case 90 constitutes the front part of the swing mechanism part 53. The front end portion of the joint case 90 is disposed between the rear end portions of the pair of side arms 80 of the swing arm 52, and is fastened to each side arm 80 (see FIG. 3). A cushion connection part 98 (connection part) to which the rear cushion 4 is connected is provided on the upper part of the joint case 90. The cushion connection portion 98 overlaps the rear wheel 3 when viewed from the left-right direction.

  The joint shaft 91 is formed in a cylindrical shape having the rolling axis R as the central axis. The front part of the joint shaft 91 is inserted into the joint case 90. The joint shaft 91 is supported by the joint case 90 so as to be rotatable around the rolling axis R through a bearing that is appropriately arranged. The rear end portion of the joint shaft 91 is coupled to the unit case 60 of the power unit 51. Accordingly, the joint shaft 91 is provided so as not to rotate around the rolling axis R with respect to the power unit 51. For example, the rear end portion of the joint shaft 91 is coupled to the lower surface of the unit case 60.

  Knighthard 92 is interposed between joint case 90 and the front end of joint shaft 91. The nighthard 92 overlaps with the rear wheel 3 when viewed from the left-right direction.

5 is a cross-sectional view taken along line VV in FIG.
As shown in FIG. 5, the knight hart 92 includes a knight hart cam 95 fixed to the joint shaft 91, and a knight hull rubber 96 interposed between the knight hart cam 95 and the inner surface of the joint case 90. A plurality of night hull rubbers 96 are provided and are engaged with the inner surface of the joint case 90, respectively. The knight hull cam 95 has a cam surface 95a facing the knight hull rubber 96 from both sides in the circumferential direction around the rolling axis R. When the knight hull cam 95 tries to rotate around the rolling axis R with respect to the joint case 90, the knight hull rubber 96 presses the knight hull rubber 96 engaged with the inner surface of the joint case 90 to elastically deform the knight hull rubber 96. The knight hull rubber 96 urges the knight hull cam 95 toward the initial position by a restoring force when elastically deforming. As a result, the Knighthard 92 biases the front vehicle body 10 in the upright direction via the swing arm 52 fixed to the joint case 90 with respect to the power unit 51 coupled to the joint shaft 91 (see FIG. 2).

  As shown in FIG. 2, the lock mechanism 93 stops the rotation of the joint shaft 91 with respect to the joint case 90 according to the operation of the parking lock lever 46 (see FIG. 1). The lock mechanism 93 is provided in the joint case 90. An intermediate portion of a parking lock cable (not shown) is linked to the lock mechanism 93. Accordingly, the lock mechanism 93 operates together with the rear brake 5 when the parking lock lever 46 is operated. The lock mechanism 93 stops the relative rotation of the joint case 90 and the joint shaft 91, thereby stabilizing the parking posture of the front vehicle body 10 via the swing arm 52 fixed to the joint case 90.

  The power supply unit 100 is provided between the front vehicle body 10 and the swing unit 50. The power supply unit 100 includes a PCU (Power Control Unit) 101, a battery box 102 (battery holding unit), a junction box 103, and a down regulator 104.

  The PCU 101 is a control unit including a PDU (Power Drive Unit) that is a motor driver, an ECU (Electric Control Unit) that controls the PDU, and the like. The PCU 101 is disposed in front of the swing mechanism unit 53. The PCU 101 is supported from below by a swing arm 52. The PCU 101 is mounted on the battery support portion 81 of the swing arm 52 and fixed to the battery support portion 81. Thereby, the PCU 101 is covered from below by the battery support portion 81.

  The battery box 102 accommodates and holds a battery 105 that is a power source of the motor 61 (see FIG. 4). Further, the battery box 102 includes a BMU (Battery Managing Unit) (not shown) that manages charging / discharging of the battery 105 and the like. A pair of battery boxes 102 are provided and are arranged side by side on the lower side of the seat 12. The pair of battery boxes 102 is placed on the PCU 101 and is disposed in front of the swing mechanism unit 53. The pair of battery boxes 102 are supported from below by the swing arm 52 via the PCU 101. The battery box 102 is covered from the front and side by a lower seat cover 36, a rear side cover 37, and a battery box cover 38.

  The battery box 102 has a rectangular parallelepiped shape, and houses the rectangular parallelepiped battery 105 therein. The battery box 102 holds the battery 105 such that the longitudinal direction of the battery 105 is along the front-rear direction. The battery box 102 has a battery insertion / removal opening that opens forward. The battery box 102 is arranged so that the battery 105 is moved in the front-rear direction (horizontal direction) to be inserted and removed. The battery 105 accommodated in the battery box 102 can be taken out from below the seat 12 by, for example, flipping up the lower seat cover 36.

  The junction box 103 collects wiring extending from the battery box 102. A wiring connected to the PCU 101, the down regulator 104, and the like extends from the junction box 103. The junction box 103 is attached to the rear part of the battery box 102.

  The down regulator 104 steps down the voltage of the direct current supplied from the battery 105. The down regulator 104 is attached to the rear part of the junction box 103. A plurality of heat radiating fins are erected at the rear portion of the down regulator 104.

  The rear cushion 4 connects the front vehicle body 10 and the swing mechanism 53. The rear cushion 4 is integrally provided with a shock absorber having a compression coil spring and a damper. A lower end portion of the rear cushion 4 is coupled to a cushion connection portion 98 of the joint case 90 in the swing mechanism portion 53. The upper end portion of the rear cushion 4 is connected to the loading frame 24 of the front vehicle body 10.

  As described in detail above, the electric three-wheeled vehicle 1 of the present embodiment has the motor 61 that drives the rear wheel 3 and is disposed between the pair of rear wheels 3 to support the pair of rear wheels 3. 51 is connected to the front vehicle body 10 and the power unit 51 so as to be swingable about a rolling axis R extending in a direction orthogonal to the left-right direction, and is provided so as to be swingable up and down with respect to the front vehicle body 10. And a rocking mechanism 53 that has a night hull 92 that urges the front vehicle body 10 in the upright direction, and at least a portion thereof overlaps with the rear wheel 3 when viewed from the left and right.

Here, when the rear wheel 3 connected to the front vehicle body 10 by the swing mechanism unit 53 swings up and down with respect to the front vehicle body 10, the swing mechanism unit 53 that connects the front vehicle body 10 and the rear wheel 3 includes: A force in the bending direction acts. The force in the bending direction acting on the swing mechanism 53 increases as the swing mechanism 53 approaches the pivot axis P from the rear wheel 3.
According to the present embodiment, the swing mechanism 53 and the ground contact point of the rear wheel 3 can be brought closer as compared with a configuration in which the swing mechanism is not overlapped with the rear wheel when viewed from the left-right direction. Thereby, when the rear wheel 3 swings up and down with respect to the front vehicle body 10 together with the power unit 51, the force in the bending direction acting on the swinging mechanism portion 53 can be reduced. Therefore, the load applied to the swinging mechanism unit 53 can be reduced.

Further, the nighthard 92 is interposed between the joint case 90 and the joint shaft 91 and overlaps with the rear wheel 3 when viewed from the left-right direction. Here, when a force in the bending direction is applied to the swinging mechanism portion 53, the joint case 90 and the joint shaft 91 are in direct contact with each other, and another member is interposed between the joint case 90 and the joint shaft 91. Power is applied to the points. That is, when a force in the bending direction acts on the swinging mechanism portion 53, a force is applied to the Knighthard 92 interposed between the joint case 90 and the joint shaft 91. The force applied to Knighthard 92 increases as it approaches the pivot axis P from the rear wheel 3 that applies a force in the bending direction to the swing mechanism 53.
According to the present embodiment, it is possible to bring the Knighthard 92 closer to the ground contact point of the rear wheel 3 as compared with a configuration in which the Knighthard does not overlap the rear wheel when viewed from the left-right direction. For this reason, when the rear wheel 3 swings up and down with respect to the front vehicle body 10 together with the power unit 51, it is possible to reduce the force in the bending direction acting on the Knighthard 92 via the joint shaft 91. Therefore, the load applied to Knighthard 92 can be reduced.

  The power unit 51 includes a differential mechanism 71 that distributes the driving force of the motor 61 to the pair of rear wheels 3. The motor 61 and the differential mechanism 71 are provided coaxially with the axle 78 of the pair of rear wheels 3. According to this configuration, the outer shape of the power unit 51 when viewed from the axial direction of the axle 78 of the rear wheel 3 is made smaller compared to a configuration in which the motor and the differential mechanism are provided on a shaft different from the axle of the rear wheel. can do. For this reason, the swing mechanism 53 is moved closer to the power unit 51, and when the rear wheel 3 swings up and down with respect to the front vehicle body 10 together with the power unit 51, the force in the bending direction acting on the swing mechanism 53 is reduced. be able to. Accordingly, it is possible to reduce the load applied to the swing mechanism portion 53 and the Knighthard 92.

  The swing mechanism 53 overlaps with the power unit 51 when viewed from the top and bottom. According to this configuration, the swing mechanism 53 can be brought closer to the power unit 51. Therefore, when the rear wheel 3 swings up and down with respect to the front vehicle body 10 together with the power unit 51, the force in the bending direction acting on the swinging mechanism portion 53 can be reduced. Accordingly, it is possible to reduce the load applied to the swing mechanism portion 53 and the Knighthard 92.

  Further, the cushion connection portion 98 in the swing mechanism portion 53 overlaps with the rear wheel 3 when viewed from the left-right direction. According to this configuration, the load of the front vehicle body 10 is received at a position near the ground contact point of the rear wheel 3 in the swing mechanism 53 as compared with a configuration in which the cushion connecting portion does not overlap the rear wheel when viewed from the left-right direction. Can do. Therefore, the shared load of the front and rear wheels can be optimized.

  Further, the battery box 102 is disposed in front of the swinging mechanism portion 53. According to this configuration, it is possible to effectively use the space generated in front of the swinging mechanism unit 53 by arranging the swinging mechanism unit 53 so as to overlap the rear wheel 3 when viewed from the left-right direction.

  The battery box 102 is formed such that the battery 105 can be taken out from below the seat 12. According to this configuration, the battery 105 can be easily taken out to a low position while an occupant or the like stands on the side of the vehicle. Further, the battery 105 can be taken out without lowering the article storage box 6 mounted on the loading platform 39 from the loading platform 39. Therefore, the usability of the electric three-wheel vehicle 1 can be improved.

  The battery box 102 is disposed below the seat 12 and holds the battery 105 so that the longitudinal direction of the battery 105 is along the horizontal direction. According to this configuration, a space can be provided between the battery box 102 and the seat 12 while suppressing an increase in the vertical dimension of the battery box 102. As a result, a storage space for storing articles can be provided under the seat 12, and the usability of the electric three-wheel vehicle 1 can be improved.

  The PCU 101 is covered from below by the battery support portion 81. For this reason, the battery support portion 81 can prevent a road surface step or the like from contacting the PCU 101. Therefore, the PCU 101 can be protected and damage to the PCU 101 can be suppressed.

  In the first embodiment, the rear end portion of the joint shaft 91 is coupled to the lower surface of the unit case 60. However, the present invention is not limited to this. For example, the joint shaft 91 may be coupled to the upper surface or the front surface of the unit case 60. .

  Moreover, in the said 1st Embodiment, although the termination | terminus of the parking lock cable is connected to the rear brake 5, it is not limited to this. The terminal end of the parking lock cable may be connected to a mechanism that locks the gear in the power unit to stop the rotation of the rear wheel 3, for example.

  In the first embodiment, the entire night hull 92 overlaps with the rear wheel 3 when viewed from the left-right direction. However, if at least a part of the night hart 92 overlaps with the rear wheel 3 when viewed from the left-right direction, It is possible to achieve the effects obtained.

[Second Embodiment]
Next, a second embodiment will be described with reference to FIGS. The second embodiment is different from the first embodiment in that it includes a pair of motors 261A and 261B that drive the pair of rear wheels 3 separately. The configurations other than those described below are the same as those in the first embodiment.

FIG. 6 is a left side view showing the rear part of the electric three-wheeled vehicle of the second embodiment. FIG. 7 is a bottom view showing the rear part of the electric three-wheeled vehicle of the second embodiment.
As shown in FIGS. 6 and 7, the electric three-wheeled vehicle 201 of the second embodiment includes a swing unit 250 that supports the pair of rear wheels 3 and is connected to the front vehicle body 10 so as to be swingable up and down. The swing unit 250 includes a power unit 251 provided between the pair of rear wheels 3, a swing arm 52, and a swing mechanism 253 that is interposed between the power unit 251 and the swing arm 52.

  As shown in FIG. 7, the power unit 251 supports a pair of rear wheels 3. The power unit 251 includes a first motor 261A that supports the left rear wheel 3 and drives the left rear wheel 3, a second motor 262B that supports the right rear wheel 3 and drives the right rear wheel 3, Is provided.

  The first motor 261A and the second motor 261B are in-wheel type motors provided in the wheel of the rear wheel 3, respectively. The first motor 261A and the second motor 261B are variable speed driven by, for example, VVVF control. The first motor 261A and the second motor 261B include a motor housing 263, a stator and a rotor (not shown) disposed in the motor housing 263, an output shaft (not shown) coupled to the rotor, and a rear And an axle 267 of the rear wheel 3 that is coupled to the wheel 3 and rotates in response to the rotation of the output shaft. For example, a reduction gear is interposed between the output shaft and the axle 267, and the driving rotation output from the rotor to the output shaft is decelerated and transmitted to the axle 267. Rear brakes 5 are disposed between the first motor 261A and the left rear wheel 3 and between the second motor 261B and the right rear wheel 3, respectively.

  As shown in FIGS. 6 and 7, the swing mechanism 253 is fixed to the swing arm 52 at the front and fixed to the power unit 251 at the rear. Accordingly, the swing mechanism 253 is provided so as to be able to swing up and down with respect to the front vehicle body 10 together with the power unit 251 and the swing arm 52. The swing mechanism 253 connects the front vehicle body 10 and the power unit 251 via the swing arm 52 so as to be swingable about the rolling axis R.

  The swing mechanism 253 includes a joint case 290 (second member) fixed to the swing arm 52, a joint shaft 291 (first member) fixed to the power unit 251 and rotatably supported by the joint case 290. , And a lock mechanism 93 that can restrain the relative rotation of the joint case 290 and the joint shaft 291. At least a part of the swing mechanism 253 is disposed between the first motor 261A and the second motor 261B and overlaps the rear wheel 3 when viewed from the left-right direction. Specifically, at least a part of a portion of the swing mechanism 253 where the joint case 290 and the joint shaft 291 overlap when viewed from the direction orthogonal to the rolling axis R is between the first motor 261A and the second motor 261B. It is arrange | positioned between and it overlaps with the rear-wheel 3 seeing from the left-right direction.

  The joint case 290 constitutes the front part of the swinging mechanism part 253. The front end portion of the joint case 290 is disposed between the rear end portions of the pair of side arms 80 of the swing arm 52 and is fastened to the swing arm 52. A cushion connection part 298 (connection part) to which the rear cushion 4 is connected is provided on the upper part of the joint case 290. The cushion connecting portion 298 overlaps the rear wheel 3 vertically above the axle 267 when viewed from the left-right direction.

8 is a cross-sectional view taken along line VIII-VIII in FIG.
As shown in FIGS. 6 to 8, an insertion portion 290 a into which a later-described second shaft 291 b of the joint shaft 291 is inserted is formed at the rear portion of the joint case 290. The insertion portion 290a is formed so as to avoid the second shaft 291b that swings around the rolling axis R.

  As shown in FIG. 7, the joint shaft 291 includes a first shaft 291 a formed in a columnar shape having the rolling axis R as a central axis, a second shaft 291 b extending from the middle portion of the first shaft 291 a to the left and right sides, Have The first shaft 291a is supported by the joint case 290 so as to be rotatable about the rolling axis R through a bearing that is appropriately disposed. In the illustrated example, the first shaft 291a is supported by the joint case 290 on both front and rear sides across the connecting portion between the first shaft 291a and the second shaft 291b. A Knighthard 92 is interposed between the front end portion of the first shaft 291a and the joint case 290.

  The second shaft 291b protrudes from the joint case 290 to the left and right sides through the insertion portion 290a of the joint case 290. The left end of the second shaft 291b is fixed to the motor housing 263 of the first motor 261A. The right end of the second shaft 291b is fixed to the motor housing 263 of the second motor 261B.

  As described in detail above, in this embodiment, the swing mechanism 253 is between the first motor 261A that drives the left rear wheel 3 and the second motor 261B that drives the right rear wheel 3. Is arranged. According to this configuration, the swinging mechanism portion 253 and the ground point of the rear wheel 3 can be brought closer to each other as compared with a configuration in which the swinging mechanism portion is not disposed between the first motor and the second motor. Thereby, when the rear wheel 3 swings up and down with respect to the front vehicle body 10 together with the power unit 251, the force in the bending direction acting on the swinging mechanism portion 253 can be reduced. Therefore, the load applied to the swinging mechanism portion 253 can be reduced.

  Further, the cushion connecting portion 298 in the swing mechanism portion 253 is provided vertically above the axle 267. According to this configuration, the load of the front vehicle body 10 can be received at a portion of the swinging mechanism portion 253 immediately above the ground contact point of the rear wheel 3. Therefore, the shared load of the front and rear wheels can be optimized.

  In the second embodiment, the second shaft 291b of the joint shaft 291 extends from the intermediate portion of the first shaft 291a. However, the present invention is not limited to this. For example, as shown in FIG. 9, in the swing mechanism 353, the second shaft 391b of the joint shaft 391 avoids the joint case 390 from the rear end portion of the first shaft 391a extending along the rolling axis R. The first motor 261 </ b> A and the second motor 261 </ b> B may be fixed to the motor housing 263.

The present invention is not limited to the above-described embodiment described with reference to the drawings, and various modifications can be considered within the technical scope thereof.
For example, in the above-described embodiment, the joint cases 90, 290, 390 of the swing mechanism parts 53, 253, 353 are fixed to the swing arm 52, and the joint shafts 91, 291, 391 are fixed to the power units 51, 251. However, the present invention is not limited to this. That is, the joint shaft may be fixed to the swing arm, and the joint case may be fixed to the power unit.

  Moreover, in the said embodiment, although PCU101 is mounted on the swing arm 52, it is not limited to this, PCU may be provided integrally with the power unit. In this case, it is desirable to directly support the battery box from below by the swing arm 52.

  In addition, it is possible to appropriately replace the constituent elements in the above-described embodiments with well-known constituent elements without departing from the spirit of the present invention, and the above-described embodiments and modifications may be appropriately combined. Good.

  DESCRIPTION OF SYMBOLS 1,201 ... Electric three-wheel vehicle 2 ... Front wheel 3 ... Rear wheel 4 ... Rear cushion (cushion) 10 ... Front vehicle body 12 ... Seat 51, 251 ... Power unit 53, 253, 353 ... Swing mechanism part 61, 261A, 261B ... Motor 71 ... Differential mechanism 90, 290, 390 ... Joint case (second member) 91, 291, 391 ... Joint shaft (first member) 92 ... Knighthard (biasing mechanism) 98, 298 ... Cushion connection (connection) 102 ... Battery box (battery holding part) 105 ... Battery R ... Rolling axis

Claims (10)

A single front wheel (2);
A pair of left and right rear wheels (3);
A front vehicle body (10) supporting the front wheel (2);
A power unit (51, 261) having motors (61, 261A, 261B) for driving the rear wheels (3) and disposed between the pair of rear wheels (3) to support the pair of rear wheels (3); 251),
The front vehicle body (10) and the power unit (51, 251) are swingably connected around a rolling axis (R) extending in a direction orthogonal to the vehicle width direction, and are vertically moved with respect to the front vehicle body (10). An urging mechanism (92) is provided so as to be able to swing and urges the front vehicle body (10) in an upright direction with respect to the power unit (51, 251), at least a part of which is viewed from the vehicle width direction. Swing mechanism (53, 253, 353) overlapping the rear wheel (3),
An electric three-wheeled vehicle comprising: The swing mechanism (53, 253, 353)
A first member (91, 291 and 391) provided non-rotatable around the rolling axis (R) with respect to the power unit (51, 251);
A second member (90, 290, 390) provided to be rotatable about the rolling axis (R) with respect to the first member (91, 291 and 391);
With
The biasing mechanism (92) is interposed between the first member (91, 291 and 391) and the second member (90, 290 and 390),
At least a part of the urging mechanism (92) overlaps the rear wheel (3) when viewed from the vehicle width direction.
The electric three-wheeled vehicle according to claim 1. The power unit (251)
A first motor (261A) for driving the left rear wheel (3);
A second motor (261B) for driving the right rear wheel (3);
With
The swing mechanism (253, 353) is disposed between the first motor (261A) and the second motor (261B).
The electric three-wheeled vehicle according to claim 1 or 2, characterized in that. The power unit (51) includes a differential mechanism (71) that distributes the driving force of the motor (61) to the pair of rear wheels (3).
The pair of rear wheels (3) are provided coaxially with each other,
The motor (61) and the differential mechanism (71) are provided coaxially with the axle (78) of the pair of rear wheels (3).
The electric three-wheeled vehicle according to claim 1 or 2, characterized in that. The swing mechanism (53) overlaps with the power unit (51) when viewed from above and below.
The electric three-wheeled vehicle according to any one of claims 1 to 4, wherein A cushion (4) connected to the front vehicle body (10) and the swing mechanism (53, 253, 353);
Connection portions (98, 298) between the swing mechanism (53, 253, 353) and the cushion (4) overlap the rear wheel (3) when viewed from the vehicle width direction.
The electric three-wheeled vehicle according to any one of claims 1 to 5, wherein The connecting portion (298) is provided vertically above the axle (267) of the pair of rear wheels (3).
The electric three-wheeled vehicle according to claim 6. A battery holding part (102) for holding a battery (105) as a power source of the motor (61, 261A, 261B);
The battery holding portion (102) is disposed in front of the swing mechanism portion (53, 253, 353).
The electric three-wheeled vehicle according to any one of claims 1 to 7, wherein The battery holding part (102) is formed so that the battery (105) can be taken out from below the seat (12).
The electric three-wheeled vehicle according to claim 8. The battery holding portion (102) is disposed below the seat (12) and holds the battery (105) so that the longitudinal direction of the battery (105) is along the horizontal direction.
The electric three-wheeled vehicle according to claim 8 or 9, characterized by the above.

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