JP7216129B2 - straddle-type vehicle - Google Patents

Description

The present invention relates to a straddle-type vehicle.

Conventionally, there has been known a straddle-type vehicle provided with a breather tube for discharging breather gas to the outside when the gas in the reduction gear chamber thermally expands due to the temperature rise of the oil stored in the reduction gear chamber (for example, patent References 1-3).
One end of the breather tube of Patent Document 1 is connected to a through hole in the ceiling of the reduction gear chamber. The breather tube extends upward from the through hole in the ceiling. An upper end opening of the breather tube is protected by a grommet.
The breather tube of Patent Document 2 extends upward from the wet chamber of the rear gear mechanism housing. The upper end of the breather tube is supported by a plurality of fins provided inside the inner peripheral surface of the cylindrical breather body.
One end of the breather tube of Patent Document 3 is connected to a lead-out pipe portion that leads to the upper part of the reduction gear chamber. The breather tube extends forward along the upper portion of the transmission case while being inclined upward. The other end of the breather tube rises upward at a portion corresponding to the air cleaner and opens upward.

JP-A-2-204191 Japanese Utility Model Laid-Open No. 7-25360 JP 2007-132413 A

In the case of Patent Document 1, the entrance portion of the grommet into which the breather tube enters is arranged above the ceiling of the speed reducer chamber.
In the case of Patent Document 2, the inlet portion of the breather body into which the breather tube enters is arranged above the rear gear mechanism housing.
In the case of Patent Document 3, a portion of the breather tube between the portion corresponding to the air cleaner and the lead-out pipe portion is exposed outward in the vehicle width direction.
In Patent Documents 1 to 3, the breather tube is exposed in the vehicle width direction, so there is a high possibility that the breather tube will come off due to disturbance in the vehicle width direction. Therefore, there is a demand for a technique that reduces the possibility that the breather tube will come off due to disturbance.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to reduce the possibility that an atmosphere opening portion will come off due to disturbance.

As means for solving the above problems, aspects of the present invention have the following configurations.
(1) A straddle-type vehicle according to an aspect of the present invention includes a transmission unit (39) that transmits power to drive wheels (4), one end of which communicates with the interior of the transmission unit (39), and the other end of which communicates with the atmosphere. a cover (70) having an open atmosphere opening part (60) and an opening entrance (72h) for receiving the atmosphere opening part (60) and covering the other end of the atmosphere opening part (60); The open portion entrance (72h) overlaps at least a portion of the transmission unit (39) when viewed from the side of the vehicle, and the cover (70) protects the electrical components (80) from the electrical component protection portion (71). ) .

(2) In the straddle-type vehicle described in (1) above, the transmission unit (39) accommodates a transmission device (40) for transmitting power to the driving wheels (4) and the transmission device (40). a transmission case (50), wherein the transmission (40) comprises a transmission (41) and a gear reduction mechanism (42), the transmission case (50) includes the gear reduction mechanism (42) A gear case (53) is provided for housing, one end of the atmosphere release portion (60) is connected to the gear case (53), and the cover (70) covers the other end of the atmosphere release portion (60). , The opening inlet (72h) may overlap at least a portion of the transmission case (50) when viewed from the side of the vehicle.

(3) In the straddle-type vehicle described in (2) above, the atmosphere release portion (60) includes a first pipe (61) having one end connected to the gear case (53) and the first pipe ( 61) a second tube (62) having one end detachably attached to the other end, and the cover (70) may cover the other end of the second tube (62). .

( 4 ) In the saddle-ride type vehicle according to any one of (1) to (3) above, the opening entrance (72h) is positioned further in the vehicle width direction than at least a portion of the electrical protection portion (71). It may be provided inside.

( 5 ) In the straddle-type vehicle according to any one of (1) to (4) above, the electrical component protection portion (71) includes a body protection portion (73) that protects an electrical component body (81); a wiring protection portion (74) that protects the wiring (82) extending from the electrical equipment main body (81), and the length (W1) of the main body protection portion (73) in the vehicle width direction 74) in the vehicle width direction (W2).

( 6 ) In the straddle-type vehicle described in ( 5 ) above, the cover (70) includes an opening protection portion ( 72), and the opening protection portion (72) may be provided at the boundary between the main body protection portion (73) and the wiring protection portion (74).

( 7 ) In the straddle-type vehicle described in ( 6 ) above, the upper end of the opening protection portion (72) is arranged above the main body protection portion (73) and the wiring protection portion (74). good too.

( 8 ) In the straddle-type vehicle described in ( 7 ) above, the cover (70) has an arcuate shape that curves upward when viewed from the side of the vehicle, and the opening (72h) is the cover ( 70) may be arranged above the center (HC) in the vertical direction.

( 9 ) In the straddle-type vehicle according to any one of (1) to (8) above, the electrical component (80) includes a speed detection sensor (81) for detecting the rotation speed of the drive wheel (4). ) may be included.

According to the straddle-type vehicle described in the above (1) of the present invention, the transmission unit for transmitting power to the drive wheels and the atmosphere opening portion having one end communicating with the interior of the transmission unit and the other end open to the atmosphere. and a cover that has an opening entrance into which the atmosphere opening part enters and covers the other end of the atmosphere opening part, and the opening entrance overlaps at least a part of the transmission unit when viewed from the side of the vehicle, so that the following Effective.
For example, if the inlet of the open part does not overlap the transmission unit when viewed from the side of the vehicle, the part of the open part that enters the inlet of the open part is exposed in the vehicle width direction, so the air open part will come off due to disturbance in the vehicle width direction. Probability is high. On the other hand, according to this configuration, since the entrance of the opening overlaps with at least part of the transmission unit when viewed from the side of the vehicle, the entrance of the opening is covered from the vehicle width direction by at least part of the transmission unit. , the portion entering the opening of the opening can be protected from disturbance in the vehicle width direction. Therefore, it is possible to reduce the possibility that the atmosphere opening portion will come off due to disturbance.

According to the straddle-type vehicle described in (2) above of the present invention, the transmission unit includes a transmission that transmits power to the driving wheels, and a transmission case that houses the transmission, and the transmission is configured to transmit power to the drive wheels. a gear and a gear reduction mechanism, the transmission case has a gear case containing the gear reduction mechanism, one end of the atmosphere opening part is connected to the gear case, the cover covers the other end of the atmosphere opening part, and the opening part The inlet overlaps at least a portion of the transmission case when viewed from the side of the vehicle, thereby providing the following effects.
At least a portion of the transmission case covers the entrance of the opening in the vehicle width direction, so that the portion of the air vent that enters the opening can be protected from disturbance in the vehicle width direction. Therefore, it is possible to reduce the possibility that the atmospheric release portion will come off from the gear case due to disturbance.

According to the straddle-type vehicle described in (3) above of the present invention, the atmosphere opening portion includes a first pipe having one end connected to the gear case, and one end detachably attached to the other end of the first pipe. and the attached second tube, and the cover covers the other end of the second tube, thereby providing the following effects.
Since the portion of the second pipe that enters the opening of the open portion can be protected from disturbance in the vehicle width direction, it is possible to reduce the possibility that the second pipe will come off from the first pipe due to disturbance. In addition, one end of the second tube is detachably attached to the other end of the first tube, so that the second tube can be changed according to required specifications. For example, when the first tube molded with a mold is integrally connected to the gear case, only the second tube needs to be changed according to the required specifications, and the mold for the first tube can be used. Because it can be done, versatility increases.

According to the straddle-type vehicle described in ( 1 ) above of the present invention, the cover has the electrical component protection portion that protects the electrical components, thereby providing the following effects.
Since the cover serves both to protect the electrical components and to protect the portion open to the atmosphere, the number of parts can be reduced compared to the case where the electrical component protection portion is provided separately from the cover.

According to the saddle-ride type vehicle described in ( 4 ) of the present invention, the opening entrance is provided on the inner side in the vehicle width direction of at least a portion of the electrical equipment protection portion, thereby providing the following effects.
Compared to the case where the opening portion entrance is provided outside the electrical equipment protection portion in the vehicle width direction, it is possible to prevent external disturbance in the vehicle width direction from reaching the portion of the atmosphere opening portion entering the opening portion entrance. can. Therefore, it is possible to further reduce the possibility that the atmosphere opening portion will come off due to disturbance.

According to the saddle-ride type vehicle according to the above ( 5 ) of the present invention, the electrical component protection portion includes a body protection portion that protects the electrical component main body, and a wiring protection portion that protects the wiring extending from the electrical component main body. Since the length of the protection portion in the vehicle width direction is larger than the length of the wiring protection portion in the vehicle width direction, the following effects can be obtained.
The size of the cover can be made suitable for the size of the electrical equipment main body and the size of the wiring.

According to the straddle-type vehicle described in ( 6 ) of the present invention, the cover includes an opening protection portion that protects a portion of the atmosphere opening portion that enters the opening entrance, and the opening protection portion is a main body protection portion. and the wiring protection portion, the following effects are obtained.
By the way, when the length of the main body protection portion in the vehicle width direction is larger than the length of the wiring protection portion in the vehicle width direction, the boundary between the main body protection portion and the wiring protection portion tends to have lower rigidity than other portions. On the other hand, according to this configuration, since the open protection portion is provided at the boundary between the main body protection portion and the wiring protection portion, the open protection portion increases the rigidity of the boundary between the main body protection portion and the wiring protection portion. can be done.

According to the straddle-type vehicle described in ( 7 ) above of the present invention, the upper end of the opening protection portion is arranged above the main body protection portion and the wiring protection portion, thereby exhibiting the following effects.
Since the atmosphere opening part can be inserted deep into the open protection part, it is possible to further reduce the possibility that the atmosphere opening part will come off due to disturbance.

According to the straddle-type vehicle described in ( 8 ) of the present invention, the cover has an arcuate shape that curves upward when viewed from the side of the vehicle, and the entrance to the opening is located above the center of the cover in the vertical direction. By being arranged, the following effects are produced.
For example, if the inlet of the opening is arranged below the center of the cover in the vertical direction (if the position of the inlet of the opening is too low), the opening to the atmosphere bends when the opening to the atmosphere is inserted into the inlet of the opening, There is a high possibility that oil will accumulate inside the air release portion. On the other hand, according to this configuration, since the opening portion entrance is arranged above the center of the cover in the vertical direction, it is possible to suppress the deflection of the atmosphere opening portion when inserting the atmosphere opening portion into the opening portion entrance. Therefore, there is a low possibility that oil will accumulate inside the air opening portion. In addition, compared to the case where the opening portion entrance is located below the center of the cover in the vertical direction, it is easier to insert the air release portion into the opening portion entrance, thereby improving workability.

According to the saddle-ride type vehicle described in ( 9 ) of the present invention, the electrical component includes the speed detection sensor that detects the rotational speed of the drive wheels, thereby exhibiting the following effects.
Since the cover serves both to protect the speed detection sensor and to protect the part open to the atmosphere, compared to the case where the protection member for the speed detection sensor is provided separately from the cover, it is possible to reduce the number of parts while maintaining an efficient layout. .

1 is a left side view of the motorcycle of the embodiment; FIG. It is the perspective view which looked at the periphery including the transmission unit of embodiment from the front upper part. It is a top view of the periphery containing the transmission unit of embodiment. 4 is a right side view including the IV-IV section of FIG. 3; FIG. FIG. 5 is a perspective view including a VV section of FIG. 4; It is the perspective view which looked at the cover of embodiment from the upper right. It is a top view of the cover of embodiment. It is a right view of the cover of embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, a scooter-type motorcycle will be described as an example of a straddle-type vehicle. Hereinafter, the motorcycle may be simply referred to as a "vehicle". Note that directions such as front, rear, left, and right in the following description are the same as directions in the vehicle described below unless otherwise specified. An arrow FR indicating the front of the vehicle, an arrow LH indicating the left of the vehicle, and an arrow UP indicating the upper side of the vehicle are shown at appropriate locations in the drawings used in the following description.

<Whole vehicle>
As shown in FIG. 1, a motorcycle 1 (straddle-type vehicle) includes front wheels 3 (steering wheels) steered by a handlebar 2 and rear wheels 4 (driving wheels) driven by a power unit 10 including a power source. ) and a vehicle body frame 20 that supports the power unit 10 .

The vehicle body frame 20 includes a head pipe 21 that steerably supports the steering wheel 2, a down frame 22 that extends downward and rearward from the head pipe 21, a lower frame 23 that extends rearward from the lower end of the down frame 22, and a lower frame 23. and a rear frame 24 extending rearward and upward from the rear end of the frame.

The vehicle body frame 20 is covered with a vehicle body cover 30. - 特許庁A seat 6 having front and rear seating surfaces for seating an occupant is supported above the rear portion of the vehicle body cover 30 . The vehicle body cover 30 includes a step floor 31 on which a driver seated on a seat 6 puts his feet, a front body 32 connected to the front of the step floor 31, and a rear body 33 connected to the rear of the step floor 31. - 特許庁Above the step floor 31 and between the seat 6 and the steering wheel 2, a straddle space 35 is formed so that the occupant can easily straddle the vehicle body. On the lower left side of the step floor 31, a foldable side stand 36 capable of supporting the vehicle body in an upright state with the vehicle body tilted to the left side is provided.

<Power unit>
The power unit 10 is a swing-type power unit in which an engine 11 (internal combustion engine), which is a prime mover of the motorcycle 1, and a rear wheel 4, which is a driving wheel, swing integrally with respect to a vehicle body frame 20 (body body). The power unit 10 is an integrated unit in which the engine 11 is arranged in the front part and the transmission 41 for changing the output of the engine 11 is arranged in the rear left part. An air cleaner 15 is provided above the power unit 10 .

A rear portion of the power unit 10 (rear portion of the transmission) supports an axle 4a (rear wheel axle 4a) of the rear wheel 4 which is a drive wheel. A lower front portion of the power unit 10 is supported by, for example, a lower support portion of the vehicle body frame 20 via a suspension link or the like so as to be vertically swingable. A rear end portion of the power unit 10 is supported by a rear end portion of a vehicle body frame 20 via a rear cushion 7 which is a shock absorber.

The power unit 10 includes an engine 11 that is an internal combustion engine that burns a combustible air-fuel mixture to obtain output, an ACG starter motor (not shown) that functions as a starter and a generator, and a crankshaft 12 that is connected to the engine 11. and a transmission unit 39 for transmitting power from the rear wheels 4, which are driving wheels.

<Transmission unit>
The transmission unit 39 includes a transmission device 40 that transmits power to the rear wheels 4 that are driving wheels, and a transmission case 50 that houses the transmission device 40 .
The transmission device 40 includes a transmission 41 and a gear reduction mechanism 42 (see FIG. 4). For example, the transmission 41 is a V-belt type continuously variable transmission. The transmission 41 includes a driving pulley 43 attached to one end of the crankshaft 12, a driven pulley 45 attached to a driven shaft 44 provided behind the driving pulley 43 via a centrifugal clutch, the driving pulley 43 and and an endless V-belt 46 wound around a driven pulley 45 .

The transmission case 50 extends from the left side of the crankcase 13 toward the left side of the rear wheel. As shown in FIG. 2, the transmission case 50 includes an inner case 51 integrally provided on the left side of the crankcase 13, an outer case 52 connected to the inner case 51 from the left side, and a right rear portion of the inner case 51. and a coupled gear case 53 .

As shown in FIG. 4, the transmission case 50 has a transmission chamber 54 that houses the transmission 41 (see FIG. 1) and a reduction gear chamber 55 that houses the gear reduction mechanism 42 . A transmission chamber 54 is a dry space formed between the inner case 51 and the outer case 52 . The speed reducer chamber 55 is a wet space formed between the inner case 51 and the gear case 53 . The reduction gear chamber 55 is provided isolated from the transmission chamber 54 . Oil is stored in the reduction gear chamber 55 . The rear wheel axle 4a is rotatably supported by the rear portion of the inner case 51 and the gear case 53 of the transmission case 50. As shown in FIG.

The driven shaft 44 has an axis parallel to the crankshaft 12 . The driven shaft 44 is rotatably supported by the transmission case 50 . The driven shaft 44 penetrates the inner case 51 in a liquid-tight and rotatable manner. For example, one end of the driven shaft 44 is rotatably supported by the outer case 52 via a bearing. For example, the other end of the driven shaft 44 is rotatably supported by the gear case 53 via a bearing. For example, the intermediate portion of the driven shaft 44 is rotatably supported by the inner case 51 via bearings.

The gear reduction mechanism 42 includes a first gear 47a provided on the driven shaft 44, an intermediate shaft 48 having an axis parallel to the driven shaft 44 and the rear wheel axle 4a, and a The meshing second gear 47b, the third gear 47c provided on the intermediate shaft 48 and arranged on the outer side (left side) in the vehicle width direction of the second gear 47b, and the third gear 47c provided on the rear wheel axle 4a. and a fourth gear 47d that meshes with it. The intermediate shaft 48 is rotatably supported by the inner case 51 and the gear case 53 . Although not shown, oil is stored in the lower portion of the speed reducer chamber 55 to lubricate the gears 47a to 47d by immersing them.

<Open to atmosphere>
At the top of the gear case 53, an atmosphere release portion 60 is provided for discharging the breather gas to the outside when the gas in the speed reducer chamber 55 thermally expands as the oil temperature rises. The atmosphere opening portion 60 extends outward from the transmission unit 39 to open the inside of the gear case 53 to the atmosphere. One end of the atmosphere opening portion 60 communicates with the inside of the transmission unit 39 . The other end of the atmosphere opening portion 60 is open to the atmosphere. The atmosphere opening portion 60 includes a first tube 61 having one end connected to the gear case 53 and a second tube 62 having one end detachably attached to the other end of the first tube 61 .

For example, the first pipe 61 is made of metal. As shown in FIG. 2 , the first tube 61 extends upward (specifically, front-upward) from the upper end of the gear case 53 , and then curves to the left (specifically, left-front). extended. The first pipe 61 has an L shape when viewed from the vehicle width direction and the vehicle front-rear direction. A lower end of the first tube 61 is fixedly connected to the gear case 53 .

For example, the second tube 62 is made of an elastic member such as rubber. The second tube 62 is a breather tube. The second pipe 62 extends leftward (specifically, left front) from the left end of the first pipe 61, and then curves and extends upward. As shown in FIG. 5, the upper end of the second pipe 62 is open upward.

<Cover>
As shown in FIG. 2 , the transmission case 50 is provided with a cover 70 that covers the atmosphere release portion 60 . The cover 70 is detachably attached to the transmission case 50 . The cover 70 is fixed to the upper right portion of the inner case 51 with fastening members such as bolts. As shown in FIG. 4, the cover 70 has an opening inlet 72h into which the atmosphere opening portion 60 enters. The open portion entrance 72h overlaps the rear upper portion of the transmission case 50 in a side view (vehicle side view) of FIG. The opening inlet 72h is arranged below the upper end of the transmission case 50 when viewed from the side in FIG. The cover 70 covers the upper end of the second pipe 62 in the atmosphere opening portion 60 .

The cover 70 has an arcuate shape that curves upward when viewed from the side in FIG. The cover 70 includes an electrical component protection portion 71 that protects the electrical component 80, and an open protection portion 72 that protects the upper portion of the second pipe 62 (the portion of the open portion 60 that enters the open portion inlet 72h). In the side view of FIG. 8, the electrical component protection portion 71 and the cover rear attachment portion 76 (the portion attached to the transmission case 50 at the rear of the cover 70) are formed to curve upward.

The electrical equipment 80 includes a speed detection sensor 81 (see FIG. 4) that detects the rotational speed of the rear wheels 4 (see FIG. 1) that are driving wheels. As shown in FIG. 2 , the electrical component 80 includes a speed detection sensor 81 (electric component main body) and wiring 82 extending from the speed detection sensor 81 .

As shown in FIG. 4, the speed detection sensor 81 has a detection tip 81a that extends into the speed reducer chamber 55. As shown in FIG. The detection tip 81a is arranged to face the fourth gear 47d provided on the rear wheel axle 4a. The speed detection sensor 81 detects the rotation speed of the rear wheel axle 4a with a detection tip 81a.
As shown in FIG. 2, the wiring 82 extends from the speed detection sensor 81 while curving forward. For example, the detection signal of the speed detection sensor 81 is sent to an electronic control unit (ECU) (not shown) through wiring 82 .

The electrical protection section 71 includes a body protection section 73 that protects the speed detection sensor 81 and a wiring protection section 74 that protects the wiring 82 extending from the speed detection sensor 81 .
As shown in FIG. 4 , the body protection portion 73 is arranged above the gear case 53 . The main body protection portion 73 overlaps the rear portion of the inner case 51 in a side view of FIG. 4 . The main body protection portion 73 extends while curving forward from the rear upper end of the gear case 53 in a side view of FIG. 4 .

As shown in FIG. 3 , the body protection portion 73 is formed so as to avoid the mounting portion 56 of the transmission case 50 . The main body protection portion 73 has a V shape that opens outward in the vehicle width direction when viewed from above in FIG. The main body protection portion 73 overlaps the rear portion of the gear case 53 when viewed from above in FIG. The main body protection portion 73 is provided within a range in the vehicle width direction of the gear case 53 when viewed from above in FIG. 3 .

The wire protection portion 74 extends forward from the front end of the main body protection portion 73 . The wire protection portion 74 has an arc shape that curves upward in a side view of FIG. 4 . The wire protection portion 74 extends forward and upward from the front end of the left side portion of the main body protection portion 73 in a side view of FIG. 4, and then curves and extends forward (slightly forward and downward). The wire protection portion 74 extends along the upper edge of the inner case 51 in a side view of FIG. 4 . The wire protection portion 74 extends forward (slightly forward left) from the front end of the left side portion of the body protection portion 73 when viewed from above in FIG. 3 . 3 and 4, illustration of the wiring 82 extending from the speed detection sensor 81 is omitted.

As shown in FIG. 3, the length W1 of the body protection portion 73 in the vehicle width direction is greater than the length W2 of the wiring protection portion 74 in the vehicle width direction. Here, the length in the vehicle width direction means the maximum length in the vehicle width direction. The length W1 of the main body protection portion 73 in the vehicle width direction corresponds to the length of the main body protection portion 73 in the vicinity of the rear end of the mounting portion 56 of the transmission case 50 in the top view of FIG. A length W2 of the wiring protection portion 74 in the vehicle width direction corresponds to a length in a direction intersecting with the extending direction of the wiring protection portion 74 when viewed from above in FIG.

As shown in FIG. 5, the opening protection portion 72 has a tubular shape extending in the vertical direction. The upper end of the open protection part 72 is closed. The lower end of the open protector 72 has an open inlet 72h (see FIG. 4) into which the second pipe 62 is inserted. The upper portion of the second pipe 62 enters the open protection portion 72 from the open portion inlet 72h. A plurality of protrusions 72a are provided on the inner surface of the upper end portion of the opening protection portion 72, and are arranged at intervals in the circumferential direction. For example, the upper end of the second tube 62 is elastically held by the projection 72a in the state of being inside the opening protection portion 72. As shown in FIG.

As shown in FIG. 4 , the open protection portion 72 is provided at the boundary between the main body protection portion 73 and the wiring protection portion 74 . The open protection portion 72 is connected to the right end of the front end portion of the main body protection portion 73 and the right end of the rear end portion of the wire protection portion 74 as viewed from above in FIG. 3 . As shown in FIG. 4 , the lower portion of the open protection portion 72 is connected to the front end portion of the main body protection portion 73 and the rear end portion (root portion) of the wiring protection portion 74 . As viewed from above in FIG. 3 , the opening entrance 72h is provided inside the wiring protection portion 74 in the vehicle width direction.

As shown in FIG. 4 , the upper end of the open protection portion 72 is arranged above the main body protection portion 73 and the wire protection portion 74 . The upper end of the opening protection portion 72 is arranged above the transmission case 50 in a side view of FIG. 4 . The upper end of the open protector 72 is provided at the uppermost end of the cover 70 .

The opening 72h is arranged above the center HC of the cover 70 in the vertical direction. Here, the center of the cover 70 in the vertical direction means the center between the upper end of the opening protection portion 72 and the lower end of the cover rear mounting portion 76 in the side view of FIG. Note that the cover rear mounting portion 76 extends rearward and downward from the rear end portion of the main body protection portion 73 in a side view of FIG. 4 . The cover rear attachment portion 76 extends rearward from the left end portion of the rear end portion of the main body protection portion 73 in top view of FIG. 7 .

As shown in FIG. 6, the cover 70 has a plurality of (eg, three in this embodiment) mounting holes 75a to 75c for mounting the cover 70 on the transmission case 50 (see FIG. 2). The plurality of mounting holes 75a to 75c are a first mounting hole 75a provided in the front end portion of the wiring protection portion 74, a second mounting hole 75b provided in the cover rear mounting portion 76, and a rear wall of the body protection portion 73. and a third mounting hole 75c provided in the portion.

The first attachment hole 75a opens in the front portion of the right side wall of the wire protection portion 74 in the vehicle width direction. The second attachment hole 75b opens the rear portion of the cover rear attachment portion 76 in the vehicle width direction. The third attachment hole 75c opens the rear wall portion of the body protection portion 73 in the front-rear direction. For example, the cover 70 is attached to the transmission case 50 (see FIG. 2) by fastening members such as bolts through the attachment holes 75a to 75c.

For example, the front end portion of the wire protection portion 74 is attached to the front upper portion of the inner case 51 by a bolt 77a (see FIG. 4) passing through the first attachment hole 75a. For example, the cover rear attachment portion 76 is attached to the rear end portion of the inner case 51 by bolts 77b (see FIG. 4) passing through the second attachment holes 75b. For example, the rear wall portion of the main body protection portion 73 is attached to the rear end portion of the gear case 53 by bolts 77c (see FIG. 4) passing through the third attachment holes 75c.

As shown in FIG. 6, the wire protection portion 74 has an opening 74h that opens vertically in the vicinity of the open protection portion 72. As shown in FIG. The wire protection portion 74 includes a locking portion 74a extending leftward from the lower edge of the opening 74h at the rear portion of the right side wall of the wire protection portion 74. As shown in FIG. For example, the engaging portion 74a abuts on the upper edge of the front-rear direction intermediate portion of the inner case 51 when the cover 70 is attached to the transmission case 50 (see FIG. 2). A wire 82 (see FIG. 2) extending from the speed detection sensor 81 extends forward between the upper wall portion of the wire protection portion 74 and the engaging portion 74a in the vertical direction.

<Effect>
As described above, the motorcycle 1 of the above-described embodiment includes the transmission unit 39 that transmits power to the rear wheel 4, and an atmosphere release portion that communicates with the inside of the transmission unit 39 at one end and is open to the atmosphere at the other end. 60, and a cover 70 having an opening entrance 72h into which the atmosphere opening portion 60 enters and covering the other end of the atmosphere opening portion 60. The opening entrance 72h is at least a part of the transmission unit 39 when viewed from the side of the vehicle. overlaps with
For example, if the opening portion entrance 72h does not overlap the transmission unit 39 when viewed from the side of the vehicle, the portion of the atmosphere opening portion 60 that enters the opening portion entrance 72h is exposed in the vehicle width direction. 60 is likely to fall out. In contrast, according to this configuration, the opening inlet 72h overlaps at least a portion of the transmission unit 39 when viewed from the side of the vehicle, so that the opening inlet 72h is covered with at least a portion of the transmission unit 39 from the vehicle width direction. , the portion of the atmosphere opening portion 60 that enters the opening portion inlet 72h can be protected from disturbance in the vehicle width direction. Therefore, it is possible to reduce the possibility that the atmospheric release portion 60 will come off due to disturbance.

In the above embodiment, the transmission unit 39 includes the transmission 40 that transmits power to the rear wheels 4 and the transmission case 50 that houses the transmission 40. The transmission 40 includes the transmission 41 and the gear reduction mechanism 42. , the transmission case 50 includes a gear case 53 that houses the gear reduction mechanism 42, one end of the atmosphere opening portion 60 is connected to the gear case 53, the cover 70 covers the other end of the atmosphere opening portion 60, The opening portion inlet 72h overlaps at least a portion of the transmission case 50 when viewed from the side of the vehicle, thereby providing the following effects.
Since the opening inlet 72h is covered from the vehicle width direction by at least a portion of the transmission case 50, the portion of the atmosphere release portion 60 that enters the opening inlet 72h can be protected from disturbance in the vehicle width direction. Therefore, it is possible to reduce the possibility that the atmospheric release portion 60 will come off from the gear case 53 due to disturbance.

In the above embodiment, the atmosphere opening portion 60 includes the first pipe 61 having one end connected to the gear case 53, the second pipe 62 having one end detachably attached to the other end of the first pipe 61, , and the cover 70 covers the other end of the second tube 62, thereby providing the following effects.
Since the portion of the second pipe 62 that enters the opening inlet 72h can be protected from disturbance in the vehicle width direction, the possibility that the second pipe 62 will come off from the first pipe 61 due to disturbance can be reduced. In addition, one end of the second pipe 62 is detachably attached to the other end of the first pipe 61, so that the second pipe 62 can be changed according to required specifications. For example, when the first tube 61 molded by a mold is integrally connected to the gear case 53, only the second tube 62 needs to be changed according to the required specifications, and the mold for the first tube 61 is changed. Since it can be diverted, versatility increases.

In the above-described embodiment, the cover 70 has the electrical component protection portion 71 that protects the electrical component 80, thereby providing the following effects.
Since the cover 70 serves both to protect the electrical equipment 80 and to protect the air release portion 60, the number of parts can be reduced compared to the case where the electrical equipment protection portion 71 is provided separately from the cover 70.

In the above-described embodiment, the opening entrance 72h is provided on the inner side of at least a part of the electrical protection portion 71 in the vehicle width direction, thereby providing the following effects.
Compared to the case where the opening portion entrance 72h is provided outside the electrical component protection portion 71 in the vehicle width direction, the portion of the atmosphere opening portion 60 that enters the opening portion entrance 72h receives external disturbance in the vehicle width direction. can be made difficult. Therefore, it is possible to further reduce the possibility that the atmosphere opening portion 60 will come off due to disturbance.

In the above embodiment, the electrical component protection portion 71 includes the main body protection portion 73 that protects the electrical component main body 81 and the wiring protection portion 74 that protects the wiring 82 extending from the electrical component main body 81. Since the length W1 of is greater than the length W2 of the wire protection portion 74 in the vehicle width direction, the following effects can be obtained.
The size of the cover 70 can be made suitable for the size of the electrical equipment main body 81 and the size of the wiring 82 .

In the above-described embodiment, the cover 70 includes the opening protection portion 72 that protects the portion of the atmosphere opening portion 60 that enters the opening entrance 72h. By being provided in the boundary, the following effects are produced.
By the way, when the length W1 of the main body protection portion 73 in the vehicle width direction is larger than the length W2 of the wiring protection portion 74 in the vehicle width direction, the boundary between the main body protection portion 73 and the wiring protection portion 74 is wider than other portions. Rigidity tends to be low. On the other hand, according to this configuration, since the opening protection portion 72 is provided at the boundary between the main body protection portion 73 and the wiring protection portion 74, the opening protection portion 72 prevents the main body protection portion 73 and the wiring protection portion 74 from being separated from each other. It is possible to increase the rigidity of the boundary.

In the above-described embodiment, the upper end of the opening protection portion 72 is arranged above the main body protection portion 73 and the wiring protection portion 74, thereby providing the following effects.
Since the atmosphere opening part 60 can be inserted deep into the opening protection part 72, the possibility that the atmosphere opening part 60 will come off due to disturbance can be further reduced.

In the above embodiment, the cover 70 has an arcuate shape that curves upward when viewed from the side of the vehicle, and the opening 72h is arranged above the center HC of the cover 70 in the vertical direction. Effective.
For example, if the opening entrance 72h is arranged below the vertical center HC of the cover 70 (if the position of the opening entrance 72h is too low), when the atmosphere opening portion 60 is inserted into the opening entrance 72h, There is a high possibility that the atmosphere opening portion 60 will bend and oil will accumulate inside the atmosphere opening portion 60 . On the other hand, according to the present configuration, the opening portion inlet 72h is arranged above the vertical center HC of the cover 70, so that the atmosphere opening portion 60 is inserted into the opening portion inlet 72h. Since the deflection can be suppressed, the possibility of oil accumulating inside the atmosphere opening portion 60 is low. In addition, compared to the case where the opening inlet 72h is arranged below the vertical center HC of the cover 70, it is easier to insert the atmosphere opening 60 into the opening inlet 72h, thereby improving workability.

In the above-described embodiment, the electrical component 80 includes the speed detection sensor 81 that detects the rotational speed of the rear wheel 4, thereby providing the following effects.
Since the cover 70 serves both to protect the speed detection sensor 81 and to protect the atmosphere opening portion 60, compared to the case where the protection member for the speed detection sensor 81 is provided separately from the cover 70, the number of parts can be reduced while achieving an efficient layout. can be reduced.

<Modification>
In the above embodiment, an example in which the entrance of the open portion overlaps with the rear upper portion of the transmission case when viewed from the side of the vehicle has been described, but the present invention is not limited to this. For example, the opening entrance may overlap the gear case when viewed from the side of the vehicle. For example, the opening entrance may overlap at least a portion of the transmission case when viewed from the side of the vehicle. For example, the opening entrance may overlap at least a portion of the transmission unit when viewed from the side of the vehicle. For example, the layout of the opening inlets can be changed according to the required specifications.

In the above embodiment, an example in which the driving wheels are the rear wheels has been described, but the present invention is not limited to this. For example, the drive wheels may be the front wheels. For example, the aspect of the drive wheels can be changed according to the required specifications.

In the above embodiments, the transmission unit includes a transmission that transmits power to the drive wheels and a transmission case that houses the transmission, the transmission includes a transmission and a gear reduction mechanism, and the transmission case includes gears. Although the example provided with the gear case which accommodates a speed reduction mechanism was mentioned and demonstrated, it does not restrict to this. For example, the transmission unit houses a swing arm extending in the front-rear direction, a joint shaft provided at one end of the swing arm in the front-rear direction, a motor provided in the drive wheel and connected to the joint shaft, and the motor. and a motor housing. For example, the motor may be an in-wheel motor provided within the wheel of the drive wheel. For example, the aspect of the transmission unit can be changed according to the required specifications.

In the above embodiment, one end of the atmosphere opening portion is connected to the gear case, the cover covers the other end of the atmosphere opening portion, and the opening portion inlet overlaps at least a portion of the transmission case when viewed from the side of the vehicle. However, it is not limited to this. For example, in the case of an in-wheel motor, one end of the atmosphere opening portion may be connected to the motor housing. For example, the opening entrance may overlap at least a portion of the drive wheels and the motor housing when viewed from the side of the vehicle. For example, the layout of the opening entrances can be changed according to the required specifications.

In the above embodiment, the atmosphere opening portion includes the first tube having one end connected to the gear case, and the second tube having one end detachably attached to the other end of the first tube, and the cover is , the other end of the second tube has been described, but the present invention is not limited to this. For example, one end of the second tube may be non-removably (fixedly) attached to the other end of the first tube. For example, the atmosphere opening part may be formed by a single pipe (atmosphere opening pipe). For example, one end of the air release tube may be integrally connected to the gear case. For example, the cover may cover the other end of the open-to-air tube. For example, the aspect of the atmosphere opening part can be changed according to the required specifications.

In the above-described embodiment, the cover includes an electrical protection portion that protects electrical components, but the present invention is not limited to this. For example, the cover may not have an electrical protection part. For example, the electrical protection part may be provided separately from the cover. For example, the aspect of the cover can be changed according to required specifications.

In the above-described embodiment, an example in which the opening entrance is provided on the inner side in the vehicle width direction of at least a part of the electrical protection portion has been described, but the present invention is not limited to this. For example, the opening entrance may be provided on the outer side in the vehicle width direction of the electrical protection portion. For example, the arrangement of the opening entrance in the vehicle width direction with respect to the electrical protection portion can be changed according to the required specifications.

In the above-described embodiment, the electrical component protection portion includes the main body protection portion that protects the electrical component main body and the wiring protection portion that protects the wiring extending from the electrical component main body, and the length of the main body protection portion in the vehicle width direction is the wiring protection portion. Although an example having a length larger than the length of the portion in the vehicle width direction has been described, the present invention is not limited to this. For example, the length of the body protection portion in the vehicle width direction may be less than or equal to the length of the wiring protection portion in the vehicle width direction. For example, the length in the vehicle width direction of the constituent elements of the electrical protection portion can be changed according to the required specifications.

In the above-described embodiment, the cover includes the open protection portion that protects the portion of the open portion that enters the opening of the open portion, and the open protection portion is provided at the boundary between the main body protection portion and the wiring protection portion. has been described above, but the present invention is not limited to this. For example, the open protection portion may be provided at a location other than the boundary between the main body protection portion and the wiring protection portion. For example, the open protection portion may be provided at the end of the wire protection portion opposite to the main body protection portion. For example, the installation mode of the open protector can be changed according to the required specifications.

In the above embodiment, an example in which the upper end of the open protection portion is arranged above the main body protection portion and the wiring protection portion has been described, but the present invention is not limited to this. For example, the upper end of the open protection portion may be arranged below the main body protection portion and the wiring protection portion. For example, the arrangement of the upper end of the open protector can be changed according to the required specifications.

In the above embodiment, the cover has an arcuate shape that curves upward when viewed from the side of the vehicle, and the entrance to the opening is arranged above the center of the cover in the vertical direction. is not limited to For example, the opening entrance may be arranged below the vertical center of the cover. For example, the vertical arrangement of the opening inlets can be changed according to the required specifications.

In the above-described embodiment, the electrical component has been described as an example including a speed detection sensor that detects the rotational speed of the drive wheels, but the present invention is not limited to this. For example, the electrical equipment may not include a speed detection sensor. For example, the electrical equipment may include a sensor other than the speed detection sensor, such as a temperature sensor. For example, the aspect of the electrical equipment can be changed according to the required specifications.

In the above embodiment, a unit-swing type motorcycle has been described as an example of a straddle-type vehicle, but the present invention is not limited to this. For example, the straddle-type vehicle may be a motorcycle having an engine mounted on the vehicle body side. For example, the aspect of the straddle-type vehicle can be changed according to the required specifications.

The present invention is not limited to the above embodiments. For example, straddle-type vehicles include general vehicles in which a driver straddles the vehicle body, motorcycles (electric motorcycles (EV), motorized vehicles, etc.). bicycles and scooter-type vehicles), but also three-wheeled vehicles (including vehicles with one front wheel and two rear wheels, as well as vehicles with two front wheels and one rear wheel). Moreover, the present invention is applicable not only to motorcycles but also to four-wheeled vehicles such as automobiles.
The configuration in the above embodiment is an example of the present invention, and various modifications, such as replacing the constituent elements of the embodiment with known constituent elements, are possible without departing from the gist of the present invention.

1 Motorcycles (straddle-type vehicles)
4 rear wheels (drive wheels)
39 Transmission Unit 40 Transmission Device 41 Transmission 42 Gear Reduction Mechanism 50 Transmission Case 53 Gear Case 60 Atmosphere Release Portion 61 First Pipe 62 Second Pipe 70 Cover 71 Electrical Equipment Protection Section 72 Opening Protection Section 72h Opening Portion Inlet 73 Body Protection Section 74 Wiring protection part 80 Electrical equipment 81 Speed detection sensor (Electrical equipment body)
82 Wiring HC Center of cover in vertical direction W1 Length of body protection part in vehicle width direction W2 Length of wiring protection part in vehicle width direction

Claims (9)

a transmission unit (39) for transmitting power to the drive wheels (4);
an atmosphere opening portion (60), one end of which communicates with the inside of the transmission unit (39) and the other end of which is open to the atmosphere;
a cover (70) having an opening entrance (72h) for receiving the atmospheric opening (60) and covering the other end of the atmospheric opening (60);
the opening portion entrance (72h) overlaps at least a portion of the transmission unit (39) when viewed from the side of the vehicle;
A straddle-type vehicle , wherein the cover (70) includes an electrical equipment protection portion (71) for protecting an electrical component (80) . The transmission unit (39) is
a transmission (40) for transmitting power to the drive wheels (4);
A transmission case (50) that houses the transmission device (40),
The transmission (40) comprises a transmission (41) and a gear reduction mechanism (42),
The transmission case (50) includes a gear case (53) that houses the gear reduction mechanism (42),
One end of the atmospheric release portion (60) is connected to the gear case (53),
The cover (70) covers the other end of the atmosphere opening part (60),
The straddle-type vehicle according to claim 1, wherein the opening (72h) overlaps at least a portion of the transmission case (50) when viewed from the side of the vehicle. The atmosphere opening part (60)
a first tube (61) having one end connected to the gear case (53);
a second tube (62) having one end detachably attached to the other end of the first tube (61),
The straddle-type vehicle according to claim 2, wherein the cover (70) covers the other end of the second pipe (62). 4. The saddle according to any one of claims 1 to 3, wherein the opening (72h) is provided inside in the vehicle width direction of at least a portion of the electrical protection portion (71). riding vehicle. The electrical protection part (71) is
a body protection portion (73) for protecting the electrical equipment body (81);
a wiring protection part (74) for protecting the wiring (82) extending from the electrical equipment main body (81);
5. The method according to claim 1 , wherein the length (W1) of the body protection portion (73) in the vehicle width direction is greater than the length (W2) of the wiring protection portion (74) in the vehicle width direction. A straddle-type vehicle according to any one of the preceding items . The cover (70) has an opening protection part (72) that protects a part of the atmosphere opening part (60) entering the opening entrance (72h),
The straddle-type vehicle according to claim 5 , wherein the opening protection portion (72) is provided at a boundary between the main body protection portion (73) and the wiring protection portion (74). The saddle-ride type vehicle according to claim 6 , wherein the upper end of the opening protection portion (72) is located above the main body protection portion (73) and the wiring protection portion (74). The cover (70) has an arcuate shape that curves upward when viewed from the side of the vehicle,
The straddle-type vehicle according to claim 7 , wherein the opening (72h) is located above the vertical center (HC) of the cover (70). The straddle-type vehicle according to any one of claims 1 to 8 , wherein the electrical equipment (80) includes a speed detection sensor (81) that detects the rotational speed of the drive wheels (4). .

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