JP6671219B2 - Saddle-type electric vehicle - Google Patents

Description

  The present invention relates to a saddle-ride type electric vehicle in which a drive device is arranged below a main frame and behind a down frame.

  2. Description of the Related Art Conventionally, as a saddle-ride type electric vehicle, a vehicle having a breather chamber as a gas-liquid separation mechanism in a drive side case in which a reduction mechanism of a drive device is housed is known (for example, see Patent Document 1).

  In the saddle-ride type electric vehicle disclosed in Patent Literature 1, the drive device is disposed near the rear end of the swing arm that supports the rear wheels. In this drive device, the motor room and the speed reducer room are adjacent to each other with a partition wall therebetween, and a water drain hole communicating from the lower portion of the motor room to the outside is provided in a lower portion of the case of the drive device. A communication hole is provided in the partition wall between the speed reducer room and the motor room.

  The pressure in the reduction gear chamber is guided to the motor chamber from the communication hole through first to fifth breather chambers provided from the rear to the upper part of the reduction gear chamber, and is released to the atmosphere from the drain hole. The lubricating oil liquefied and separated in the first to fifth breather chambers is returned to the reduction gear chamber via the lowermost first breather chamber.

WO 2013/077724

  According to the saddle-ride type electric vehicle described in Patent Literature 1, since the driving device is disposed at the rear end of the swing arm that supports the rear wheels, the first to fifth breather chambers are provided as described above. It can be arranged from the rear to the upper part of the driving room without any trouble.

  However, in the case of a saddle-ride type electric vehicle in which the driving device is disposed below the main frame and behind the down frame, a swing arm is disposed behind the driving device, and a mechanism such as a chain for transmitting the power of the driving device is driven. It is provided from the rear to the rear.

  In this case, if the arrangement of the breather chamber in the driving device of Patent Document 1 described above is adopted, inconvenience will occur in the layout of each part, so it is necessary to reconsider the arrangement of the breather chamber and the like. When the driving device is arranged below the main frame and behind the down frame, it is desirable that the driving device is more compact.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a breather capable of achieving compactness while maintaining good functions in a saddle-ride type electric vehicle in which a driving device is disposed below a main frame and behind a down frame in view of the problems of the related art. To configure the room.

The saddle-ride type electric vehicle according to the first invention includes:
A steering wheel for steering the front wheels,
A head pipe supporting the handle,
A main frame extending rearward from the head pipe,
A down frame extending rearward and downward from the head pipe;
In a saddle-ride type electric vehicle in which a drive device is disposed below the main frame and behind the down frame,
The drive device,
A motor-side case having an electric motor;
A drive-side case having a drive mechanism for transmitting power from the electric motor,
A plurality of support portions supported by the main frame,
In the drive side case, a breather chamber is arranged along the vertical wall portion ,
The drive mechanism includes a driven shaft that outputs the transmitted power,
It is characterized in that the plurality of support portions are provided at positions sandwiching the driven shaft in the vertical direction .

  According to the first invention, since the breather chamber is arranged along the vertical wall of the drive-side case, the vaporized oil in the drive mechanism is efficiently separated into gas and liquid, and the liquefied oil is removed from the drive-side case. Can be returned to the drive mechanism side.

In addition , a large load is applied to the driven shaft for transmitting the driving force to the rear wheels, but since a plurality of supporting portions supported by the main frame are provided at positions sandwiching the driven shaft in the vertical direction, the main shaft is provided. The driving device can be more stably supported by the frame by the plurality of supporting portions.

  In addition, since the drive unit is supported at multiple points by the main frame, when the lower frame connected to the down frame supports the front part of the drive unit, the drive unit is stabilized by the main frame when the lower frame is removed. It can be removed while holding it. Therefore, workability when removing the lower frame can be improved.

The saddle-ride type electric vehicle according to the second invention is
A steering wheel for steering the front wheels,
A head pipe supporting the handle,
A main frame extending rearward from the head pipe,
A down frame extending rearward and downward from the head pipe;
In a saddle-ride type electric vehicle in which a drive device is disposed below the main frame and behind the down frame,
The drive device,
A motor-side case having an electric motor;
A drive-side case having a drive mechanism for transmitting power from the electric motor,
In the drive side case, a breather chamber is arranged along the vertical wall portion,
The drive mechanism is
A driven shaft for outputting the transmitted power,
A main shaft that rotates integrally with the rotor of the electric motor,
A power transmission of the main shaft, and a counter shaft for transmitting the power to the driven shaft;
The main shaft, the counter shaft and the driven shaft are arranged in this order from the front,
The main shaft and the counter shaft are disposed below the driven shaft,
The breather chamber is arranged in front of the driven shaft.

According to the second aspect , since the driven shaft is disposed on the rear side of the drive side case and above the main shaft and the counter shaft, it is possible to secure a space for providing a breather chamber on the front side of the drive side case. it can. Therefore, the breather chamber can be provided in this space without increasing the size of the driving device.

Saddle type electric vehicle according to the third invention, in the second invention, the breather chamber is characterized in that when viewed in the lateral direction is arranged at a position overlapping with the electric motor.

According to the third aspect , the breather chamber is disposed at a position overlapping the electric motor when viewed in the left-right direction, so that the drive device can be downsized.

The saddle-ride type electric vehicle according to the fourth invention is
A steering wheel for steering the front wheels,
A head pipe supporting the handle,
A main frame extending rearward from the head pipe,
A down frame extending rearward and downward from the head pipe;
In a saddle-ride type electric vehicle in which a drive device is disposed below the main frame and behind the down frame,
The drive device,
A motor-side case having an electric motor;
A drive-side case having a drive mechanism for transmitting power from the electric motor,
And a battery for supplying electric power to the electric motor,
In the drive side case, a breather chamber is arranged along the vertical wall portion,
The breather chamber is disposed behind the battery,
A discharge pipe for discharging evaporated oil in the breather chamber is provided between the driving device and the battery.

According to the fourth aspect, since the discharge pipe is disposed at a position surrounded by the battery and the driving device, the discharge pipe can be prevented from being noticeable in appearance.
A saddle-ride type electric vehicle according to a fifth invention is the electric vehicle according to the first to third inventions, further comprising a battery for supplying electric power to the electric motor, wherein the breather chamber is disposed behind the battery, A discharge pipe for discharging oil is provided between the driving device and the battery. According to this, since the discharge pipe is disposed at a position surrounded by the battery and the driving device, the discharge pipe can be prevented from being noticeable in appearance.

1 is a front view of a saddle-ride type electric vehicle according to an embodiment of the present invention. It is a perspective view which shows the principal part of the saddle riding type electric vehicle of FIG. It is a front view which shows the principal part of the saddle type electric vehicle of FIG. FIG. 2 is a perspective view illustrating a drive mechanism portion of a drive device in the saddle-ride type electric vehicle in FIG. 1. FIG. 2 is a diagram illustrating a state near a breather chamber in the saddle-ride type electric vehicle in FIG. 1.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, a saddle-ride type electric vehicle 1 of the embodiment has a handle 3 for steering a front wheel 2, a head pipe 4 for rotatably supporting the handle 3, and a main pipe extending rearward from the head pipe 4. A frame 5 and a down frame 6 extending rearward and downward from the head pipe 4 are provided.

  As shown in FIGS. 2 and 3, the main frame 5 is configured by using a left main pipe 7 and a right main pipe 8 formed by processing a pipe material. Fixed to 1). The left main pipe 7 and the right main pipe 8 have a shape that is bent slightly downward at an intermediate portion, and further, the lower ends thereof are bent forward. 2 and 3, members such as a chain cover or a part thereof are omitted.

  The left main pipe 7 and the right main pipe 8 are connected to each other at appropriate locations in the left-right direction. For example, the left main pipe 7 and the right main pipe 8 are connected to each other by welding both ends of the first cross pipe 9 to the inside thereof before the lower ends thereof. The lower ends of the left main pipe 7 and the right main pipe 8 are similarly connected by the second cross pipe 10.

  The down frame 6 is formed using one pipe material, and the upper end thereof is fixed to the head pipe 4. As shown in FIG. 1, the gusset plate 11 is welded from the upper portion of the down frame 6 to the lower end portion of the head pipe 4, and a sufficient coupling force between the head pipe 4 and the down frame 6 is secured.

  A patch plate 12 welded between the head pipe 4, the main frame 5, and the down frame 6 is provided near the portion where the head pipe 4, the main frame 5, and the down frame 6 are joined, and a sufficient joining force is secured therebetween. .

  As shown in FIGS. 2 and 3, the front end of the lower frame 13 extending rearward from the lower end of the down frame 6 is connected to the lower end of the down frame 6. The lower frame 13 is configured using a left lower pipe 14 and a right lower pipe 15 formed by processing a pipe material, and is bent rearward at an intermediate portion, and a portion rearward of the intermediate portion is located forward of the intermediate portion. It extends rearward at a gentler slope than the part.

  The upper ends of the left lower pipe 14 and the right lower pipe 15 are fastened to the left and right sides of the lower end of the down frame 6 at two locations spaced apart in the longitudinal direction of the down frame 6 using bolts. This fastening is performed via mounting bosses 16 that project right and left at two upper ends of the left lower pipe 14 and the right lower pipe 15 spaced from each other in the longitudinal direction and have bolt holes that penetrate in the horizontal direction.

  Below the main frame 5 and behind the down frame 6, a battery 18 configured to house a lithium ion secondary battery or the like in a battery case 17 is arranged. The battery case 17 is fixed to the lower portion of the down frame 6, the patch plate 12, and the lower frame 13 using bolts or the like.

  At the lower part of the down frame 6, a frame-side fitting portion 19 protruding left and right in a cylindrical shape is provided so that this fixing can be performed. The battery case 17 is provided with left and right case side fitting portions 20 that fit into the left and right frame side fitting portions 19.

  In order to fix the battery case 17 to the patch plate 12, left and right brackets 21 each having one end fastened to the left and right side surfaces of the patch plate 12 by bolts and the other end fastened to the battery case 17 by bolts are used.

  Further, in order to fix the battery case 17 to the lower frame 13, a left mounting portion 22 and a right mounting portion 23 having bolt holes are provided at lower ends of the left lower pipe 14 and the right lower pipe 15 of the lower frame 13, respectively. It is erected rearward. Correspondingly, left and right protruding portions 24 having a bolt hole and protruding toward the lower frame 13 are provided at the lower end portion of the battery case 17.

  Between the left and right protrusions 24, a reinforcing pipe 25 that is bolted together between the left and right protrusions 24 when the battery case 17 and the lower frame 13 are fastened is arranged. The reinforcing pipe 25 has left and right bolt holes for the fastening. A driving device 26 that generates a driving force for driving the saddle-ride type electric vehicle 1 is supported by a rear portion of the main frame 5 and a rear end of the lower frame 13.

  As shown in FIG. 4, the driving device 26 decelerates the power of the main shaft 27 rotated by the prime mover via the counter shaft 28 and outputs the power from the driven shaft 29. In FIG. 4, a portion of the drive mechanism including the shaft and the reduction gear is shown in a state where a cover of the case is removed, and a joint surface with the cover is hatched. ing.

  The main shaft 27 is disposed in front of and below the driven shaft 29. Here, an electric motor driven by electric power supplied from the battery 18 is used as the prime mover. The rotation shaft of the electric motor is directly connected to the main shaft 27.

  A drive gear 27a is fixed to the main shaft 27, a large gear 28a and a small gear that mesh with the drive gear 27a are fixed to the counter shaft 28, and a driven gear 29b that meshes with the small gear is fixed to the driven shaft 29. You. The small gear is located behind the large gear 28a and is not shown. The driving force of the main shaft 27 is reduced and transmitted to the driven shaft 29 via these gears.

  As shown in FIG. 3, the driving device 26 includes an upper support 30 and a lower support 31 supported by the main frame 5. The upper support 30 and the lower support 31 have bolt holes penetrating in the left-right direction. Left and right upper support brackets 9 a having bolt holes are welded to the first cross pipe 9 (FIG. 2) of the main frame 5 corresponding to the upper support portions 30. Further, left and right lower support brackets 10 a having bolt holes are welded to the second cross pipe 10 (FIG. 2) of the main frame 5, corresponding to the lower support portions 31.

  The upper support 30 and the lower support 31 are located above and below the driven shaft 29 of the driving device 26, respectively. That is, the upper support part 30 and the lower support part 31 are installed at positions that sandwich the driven shaft 29 in the vertical direction.

  As shown in FIGS. 2 and 3, the lower frame 13 is provided with a side frame 32 extending from the upper end portion and passing through the side of the battery 18. The side frame 32 includes a left side pipe 33 and a right side pipe 34 formed using a pipe material.

  The left side pipe 33 is integrally formed with the left lower pipe 14 so that a front end thereof is connected to a middle left side of the two mounting bosses 16 of the left lower pipe 14, and extends leftward from the front end slightly and then bends backward. , To the rear lower end of the driving device 26. This integral formation is performed, for example, by welding the front end of the left side pipe 33 to the left lower pipe 14.

  At the rear end of the left side pipe 33, a side mounting portion 35 having a bolt hole penetrating left and right and fixed to the drive device 26 by a bolt is provided. The right side pipe 34 is symmetrical to the left side pipe 33 and has a similar configuration.

  At the upper end of the driving device 26, a first support portion 36 having a bolt hole penetrating left and right for fixing the upper end portion between the left and right side mounting portions 35 is provided.

  At the rear ends of the left lower pipe 14 and the right lower pipe 15 of the lower frame 13, a left lower end mounting portion 37 and a right lower end mounting portion 38 having long bolt holes on the left and right are welded. At the front end of the lower part of the driving device 26, a second support portion 39 having a bolt hole penetrating to the left and right for fixing the front end between the lower left mounting portion 37 and the lower right mounting portion 38 is provided.

  That is, the driving device 26 is disposed close to the battery 18, and the lower frame 13 supports both the battery 18 and the driving device 26. Further, the first support portion 36 is located behind the second support portion 39.

  As shown in FIG. 1, the rear wheels 40 of the saddle-ride type electric vehicle 1 are supported at the rear ends of left and right swing arms 41 extending rearward from the left and right rear ends of the drive device 26. The front end of the left swing arm 41 is rotatably supported by a pivot plate 42 provided inside a curved portion of the lower end of the left main pipe 7.

  Left and right rear cushion units 45 for supporting a seat 44 of the saddle-ride type electric vehicle 1 are provided between a portion of the swing arm 41 that supports the rear wheel 40 and a seat frame 43 that extends from an intermediate portion of the main frame 5. Can be

  As shown in FIG. 3, a sprocket 46 is provided on the driven shaft 29 of the driving device 26. The driving force of the driven shaft 29 is transmitted to the rear wheel 40 via a chain 47 hung on a sprocket 46.

  As shown in FIG. 4, the driving device 26 includes a motor-side case 48 having an electric motor, and a driving-side case 49 having the above-described driving mechanism. The right side of the motor side case 48 is covered and closed by a motor cover 50. FIG. 4 shows a state in which the drive-side cover 51 (FIG. 3), which is the cover of the drive-side case 49, has been removed, and the joint surface with the drive-side cover 51 is hatched.

  A breather chamber 53 is arranged in the drive-side case 49 along a front vertical wall 52 as a vertical wall portion thereof. The front side of the breather chamber 53 is defined by the vertical wall 52, and the rear side is defined by an inner wall 54 separating the space where the driving mechanism such as the driven shaft 29 exists.

  The breather chamber 53 is located in front of the driven shaft 29, has a vertically long shape, and exists in a range from the counter shaft 28 to slightly above the driven shaft 29 in the vertical direction. The main shaft 27 is located below the vicinity of the lower end of the breather chamber 53. That is, the breather chamber 53 is located above the main shaft 27.

  In a plane perpendicular to the driven shaft 29, the driven shaft 29, the counter shaft 28, and the main shaft 27 are arranged in an approximately L shape, the driven shaft 29 at the upper end of the L shape, the counter shaft 28 at the corner, and the other end. , A main shaft 27 is disposed.

  Accordingly, the breather chamber 53 extends from the other end to a position slightly above the level of the driven shaft 29 above the other end, and complements the above-mentioned L-shape to form a substantially U-shape or a vertically long rectangular shape. . That is, the breather chamber 53 is disposed substantially parallel to a line connecting the driven shaft 29 and the counter shaft 28.

  The breather chamber 53 is vertically divided into a plurality of small chambers 56a to 56d by some partition walls 55. Each of the small chambers 56a to 56d is connected by a channel having a sufficiently small cross-sectional area provided as a notch or an opening in each partition 55. The flow paths of the partition walls 55 are provided in a zigzag shape so as to be shifted in the vertical direction so as not to overlap.

  The lowermost chamber 56d is largely open to the opposite side to the drive mechanism with respect to the space on the drive mechanism side. A discharge pipe 57 for discharging the evaporated oil in the breather chamber 53 is connected to the uppermost small chamber 56a, and further has a small space 58 thereon.

  Therefore, the breather chamber 53 effectively utilizes the space occupied in front of the space occupied by the driven shaft 29, the counter shaft 28, and the main shaft 27 substantially in an L shape, and unnecessarily bulges the drive-side case 49 rearward. It is configured in the drive-side case 49 so as to effectively exert the gas-liquid separation function without having the same.

  FIG. 5 shows a state near the breather chamber when the saddle-ride type electric vehicle 1 is viewed from the left. FIG. 5 shows the positional relationship between the driving case 49, the battery 18, and the discharge pipe 57 extending from the driving case 49. The drive-side case 49 is shown with its cover, main shaft 27 and the like removed.

  As shown in FIG. 5, the breather chamber 53 is located behind the battery 18. Therefore, the discharge pipe 57 connected to the breather chamber 53 is provided between the drive device 26 and the battery case 17. The breather chamber 53 is located at a position overlapping the electric motor 59 of the drive device 26 in the left-right direction.

  In this configuration, when assembling the drive device 26, the motor cover 50, the motor-side case 48 in which the electric motor 59 is incorporated, and the drive-side case 49 are fastened with bolts, and the drive mechanism such as the driven shaft 29 is incorporated. It is. Further, the drive side cover 51 is fastened to the drive side case 49 with bolts.

  At this time, the joint surfaces of the motor-side case 48 and the drive-side cover 51 are joined to form walls of the small chambers 56a to 56d of the breather chamber 53 on the drive-side cover 51 side. Thereby, the breather chamber 53 is formed at a position in front of the driven shaft, above the main shaft 27, and overlapping with the electric motor 59 when viewed in the left-right direction.

  When attaching the assembled driving device 26 to the main frame 5, the upper support portion 30 of the driving device 26 is arranged between the left and right upper support brackets 9 a provided on the first cross pipe 9 of the main frame 5. , These are fastened to each other by bolts.

  Further, the lower support portion 31 of the driving device 26 is disposed between the left and right lower support brackets 10a provided on the second cross pipe 10 of the main frame 5, and these are fastened to each other by bolts. Thereby, the rear part of the driving device 26 is attached to the main frame 5.

  When attaching the drive device 26 to the side frame 32, the first support portion 36 of the drive device 26 is disposed between the side attachment portion 35 of the right side pipe 34 and the side attachment portion 35 of the left side pipe 33, These are fastened to each other through bolts. Thereby, the upper end of the driving device 26 is attached to the side frame 32.

  When the drive device 26 is attached to the lower frame 13, the second support portion of the drive device 26 is located between the lower left attachment portion 37 of the left lower pipe 14 of the lower frame 13 and the lower right attachment portion 38 of the right lower pipe 15. 39 are arranged and bolted through them to fasten them together. As a result, the front end of the lower portion of the driving device 26 is attached to the rear end of the lower frame 13.

  When mounting the battery 18, the left and right case side fitting portions 20 of the battery case 17 are fitted to the left and right frame side fitting portions 19 of the down frame 6. The reinforcing pipe 25 is disposed between the left and right protrusions 24 at the lower end of the battery case 17, and the left and right protrusions 24 are disposed between the left mounting part 22 and the right mounting part 23 of the lower frame 13. Then, a bolt is passed between them, and these are fastened to each other with the bolt.

  The left and right brackets 21 are fastened to the patch plate 12 and the battery case 17 with bolts, and the patch plate 12 and the battery case 17 are connected. Thereby, the attachment of the battery 18 is completed.

  The attached battery 18 is located at a position close to the drive device 26 and in front of the breather chamber 53 in the drive side case 49. Therefore, when the discharge pipe 57 for discharging the evaporated oil in the breather chamber 53 is provided, the discharge pipe 57 passes between the driving device 26 and the battery 18 so as to be inconspicuous in appearance. 53.

  When the driving device 26 is driven, the lubricating oil evaporates due to friction of the gears 27a, 28a, 29b and the shafts 27, 28, 29 in the driving mechanism in the driving side case 49.

  The evaporated oil is liquefied in each of the small chambers 56a to 56d of the breather chamber 53 in a process of going outside through the breather chamber 53 and the discharge pipe 57. The liquefied oil flows downward sequentially through the flow path of the partition wall 55 between the small chambers 56a to 56d due to gravity, and returns to the space on the drive mechanism side.

  During this time, the flow path of each partition 55 is in a zigzag shape, so that the oil splashed from the drive mechanism side does not scatter to the upper small chamber 56a. Further, since the breather chamber 53 is formed with the vertical wall 52 on the front side of the drive device 26 as one side wall, the breather chamber 53 is relatively well cooled by an airflow received from the front during traveling. Therefore, the evaporating oil is relatively efficiently liquefied to exhibit a good gas-liquid separation function.

  As described above, according to the present embodiment, since the breather chamber 53 is arranged along the vertical wall 52 of the drive side case 49, the oil evaporated in the drive mechanism is efficiently gas-liquid separated and liquefied. The oil can be returned to the drive mechanism side space in the drive side case 49.

  Although a large load is applied to the driven shaft 29 that outputs the driving force, the upper support 30 and the lower support 31 are provided at positions sandwiching the driven shaft 29 in the vertical direction. 5 enables stable support.

  Further, since the driving device 26 is supported by the main frame 5 via the two supporting portions of the upper supporting portion 30 and the lower supporting portion 31, when removing the lower frame 13, the driving device 26 is connected to the main frame 5. It can be removed in a state where it is stably supported. Therefore, the workability of removing the lower frame 13 can be improved.

  Further, since the driven shaft 29 is disposed on the rear side of the drive-side case 49 and above the main shaft 27 and the counter shaft 28, it is necessary to secure a space for providing the breather chamber 53 on the front side of the drive-side case 49. Can be. Therefore, the breather chamber 53 can be provided in this space without increasing the size of the driving device 26.

  In addition, since the breather chamber 53 is disposed at a position overlapping the electric motor 59 when viewed in the left-right direction, the size of the driving device 26 can be reduced.

  Further, since the breather chamber 53 is disposed behind the battery 18 and the discharge pipe 57 from the breather chamber 53 is provided between the driving device 26 and the battery 18, the discharge pipe 57 is connected by the battery 18 and the driving device 26. The surrounding discharge pipe 57 can be prevented from being noticeable in appearance.

  As described above, the embodiment of the present invention has been described, but the present invention is not limited to this. For example, the down frame 6 and the lower frame 13 may be formed integrally with each other to reduce the number of parts and the number of assembly steps. Although the breather chamber is formed along the vertical wall, the vertical wall forming the vertical wall may be a wall on the rear side of the drive-side case.

  Either one or both of the upper support portion 30 and the lower support portion 31 of the driving device 26 supported by the main frame 5 may be provided at two or more places.

  DESCRIPTION OF SYMBOLS 1 ... Saddle riding type electric vehicle, 3 ... Handle, 4 ... Head pipe, 5 ... Main frame, 6 ... Down frame, 18 ... Battery, 26 ... Drive device, 27 ... Main shaft, 28 ... Counter shaft, 29 ... Driven shaft Numeral 30, 30 upper support part, 31 lower support part, 48 motor case, 49 drive side case, 52 vertical wall (vertical wall part), 53 breather chamber, 57 discharge pipe, 59 electric motor .

Claims (5)

A steering wheel for steering the front wheels,
A head pipe supporting the handle,
A main frame extending rearward from the head pipe,
A down frame extending rearward and downward from the head pipe;
In a saddle-ride type electric vehicle in which a drive device is disposed below the main frame and behind the down frame,
The drive device,
A motor-side case having an electric motor;
A drive-side case having a drive mechanism for transmitting power from the electric motor,
A plurality of support portions supported by the main frame,
In the drive side case, a breather chamber is arranged along the vertical wall portion ,
The drive mechanism includes a driven shaft that outputs the transmitted power,
The saddle-ride type electric vehicle, wherein the plurality of support portions are installed at positions sandwiching the driven shaft in a vertical direction . A steering wheel for steering the front wheels,
A head pipe supporting the handle,
A main frame extending rearward from the head pipe,
A down frame extending rearward and downward from the head pipe;
In a saddle-ride type electric vehicle in which a drive device is disposed below the main frame and behind the down frame,
The drive device,
A motor-side case having an electric motor;
A drive-side case having a drive mechanism for transmitting power from the electric motor,
In the drive side case, a breather chamber is arranged along the vertical wall portion ,
The drive mechanism is
A driven shaft for outputting the transmitted power,
A main shaft that rotates integrally with the rotor of the electric motor,
A power transmission of the main shaft, and a counter shaft for transmitting the power to the driven shaft;
The main shaft, the counter shaft and the driven shaft are arranged in this order from the front,
The main shaft and the counter shaft are disposed below the driven shaft,
The saddle-ride type electric vehicle , wherein the breather chamber is disposed in front of the driven shaft . The saddle-ride type electric vehicle according to claim 2 , wherein the breather chamber is arranged at a position overlapping the electric motor when viewed in the left-right direction. A steering wheel for steering the front wheels,
A head pipe supporting the handle,
A main frame extending rearward from the head pipe,
A down frame extending rearward and downward from the head pipe;
In a saddle-ride type electric vehicle in which a drive device is disposed below the main frame and behind the down frame,
The drive device,
A motor-side case having an electric motor;
A drive-side case having a drive mechanism for transmitting power from the electric motor,
A battery that supplies power to the electric motor,
In the drive side case, a breather chamber is arranged along the vertical wall portion ,
The breather chamber is disposed behind the battery,
A saddle-ride type electric vehicle , wherein a discharge pipe for discharging the evaporated oil in the breather chamber is provided between the driving device and the battery . A battery that supplies power to the electric motor,
The breather chamber is disposed behind the battery,
The saddle-ride type according to any one of claims 1 to 3 , wherein a discharge pipe for discharging evaporated oil in the breather chamber is provided between the driving device and the battery. Electric vehicle.