JP6120328B2 - V belt type continuously variable transmission - Google Patents

Description

  The present invention relates to a fixed sheave that is fixed to a drive shaft, a movable sheave that is supported by the drive shaft so as to be able to approach and leave the fixed sheave in a direction along the axis of the drive shaft, and a rolling bearing to the movable sheave. And a V-belt that is wound between the fixed sheave and the movable sheave is housed in a transmission case, and an output member that can engage with the connection arm is driven by power from an actuator. An actuator unit adapted to move in a direction parallel to the axis of the drive shaft is attached to the transmission case so as to transmit the movement of the output member to the movable sheave via the connection arm and the rolling bearing; The connecting arm can be engaged with the first member attached to the rolling bearing and the output member. Only about the V-belt type continuously variable transmission which is to be constituted by a second member mounted in member.

  Such a V-belt type continuously variable transmission is known from Japanese Patent Application Laid-Open No. H10-228707. In this, an output member engaged and connected to a connecting arm supported by a movable sheave via a rolling bearing is connected to a drive shaft. The movable sheave is driven in the axial direction by moving it in a direction parallel to the axis of the shaft, and the connecting arm can be engaged with the first member attached to the rolling bearing and the output member. The second member is attached to the first member by an attachment member.

JP 2012-184788 A

  By the way, although the connecting arm is composed of two members, the first and second members are made of mutually different materials so as to obtain both rigidity, durability and weight reduction. In what was disclosed by patent document 1, since the attachment member which attaches a 2nd member to a 1st member is arrange | positioned so that it may align with an output member in the direction along the axis line of a drive shaft, it is easy to enlarge in an axial direction, In particular, if the stroke amount of the output member is sufficiently secured, the increase in the axial direction becomes more remarkable. Moreover, in what was disclosed by the said patent document 1, since the attachment member exists in the position away from the output member with respect to the drive shaft, the load added to a 1st and 2nd member becomes large in the site | part in which an attachment member is arrange | positioned. It is easy to increase the force in the direction of tilting the movable sheave. For this reason, in the one disclosed in the above-mentioned Patent Document 1, the structure for distributing the load to the portion closer to the drive shaft than the portion of the mounting member is provided on the movable sheave side and the output member side, and thus the connecting arm is also provided. The subject that it will enlarge will arise.

  This invention is made | formed in view of this situation, the load added to the 1st and 2nd member is made small in the site | part in which an attachment member is arrange | positioned, the enlargement of a connection arm is suppressed, and the axial direction of a drive shaft It is an object of the present invention to provide a V-belt type continuously variable transmission that can suppress the engagement of the output member and the connecting arm and the increase in size around the connecting portion.

To achieve the above object, the present invention provides a fixed sheave fixed to a drive shaft, and a movable sheave supported by the drive shaft so as to be able to approach and separate from the fixed sheave in a direction along the axis of the drive shaft. And a connecting arm supported by the movable sheave via a rolling bearing and a V-belt wound between the fixed sheave and the movable sheave are accommodated in a transmission case and can be engaged with the connecting arm. An actuator unit configured to move the member in a direction parallel to the axis of the drive shaft by power from the actuator transmits the movement of the output member to the movable sheave via the connecting arm and the rolling bearing. The connection arm is engaged with the output member and a first member attached to the rolling bearing. In the V-belt type continuously variable transmission which is to be constituted by a second member mounted in the mounting member to the first member as possible to, the transmission case extending in its longitudinal direction to the body frame of the saddle type vehicle is supported The drive shaft has an axis extending in the vehicle width direction and is supported by the transmission case, and the attachment member is located between the output member and the drive shaft in a direction perpendicular to the axis of the drive shaft. The second member, which is disposed at a position overlapping with at least a part of the output member in the radial direction of the drive shaft and is aligned with the first member at a mating surface along a plane orthogonal to the axis of the drive shaft, attached to the first member in the mounting operation from the outside in the vehicle width direction of the mounting member having an axis parallel to the axis of the shaft to the first aspect of Rukoto.

  According to the present invention, in addition to the configuration of the first feature, a boss portion for attaching the attachment member is formed on the first member, and the output member is moved in a direction to be pushed out from the actuator unit. A second feature is that the moving end is restricted by contact of the boss portion with the transmission case.

  In the present invention, in addition to the configuration of the first or second feature, a moving end when the output member moves in a direction in which the output member is pulled back into the actuator unit is provided on the outer surface of the actuator unit. A third feature is that a stopper is formed which is regulated by contact.

According to the present invention, in addition to any of the configurations of the first to third features, a driven shaft that is rotationally driven by power transmitted from the V-belt is disposed at the rear of the drive shaft and is disposed in the transmission case. A fourth feature is that the attachment member is accommodated and arranged on a straight line connecting the axis of the drive shaft and the driven shaft.

According to the present invention, in addition to any one of the first to fourth features, the actuator unit in a state in which the output member is disengaged from and connected to the connection arm is arranged on the rear side of the attachment member. The actuator unit is supported by the transmission case so as to be able to slide in a direction perpendicular to the axis of the drive shaft so as to move forward, and the output member is engaged with the connecting arm at a forward position of the actuator unit. The fifth feature is that they are connected.

In the present invention , in addition to the configuration of the fifth feature, an engaged portion for engaging an engaging portion provided in the output member is provided in the second member, and the driven shaft is provided in the engaged portion. A sixth feature is that a guide portion that is inclined so as to be in an upper position as it is separated from is formed so as to guide the engaging portion.

According to the present invention, in addition to the configuration of the sixth feature, the arm support portion that contacts the connection arm from below and supports the connection arm in a state where the engagement portion is detached from the engaged portion. A seventh feature is that the transmission case is provided.

According to the present invention, in addition to the configuration of the seventh feature, the arm support portion is disposed so as to be separated from the connection arm in a state where the engagement portion is engaged with the engaged portion. The eighth feature.

According to the present invention, in addition to the configuration of the eighth feature, an arm portion that contacts at least the output member from above in an engaged state of the engaging portion with the engaged portion is the output member of the arm portion. as the connecting arm is spaced apart from the arm supporting part by the contact to, that provided in the connecting arm shall be the ninth feature of the.

According to the first aspect of the present invention, the second member that can be engaged with the output member is attached to the first member in order to constitute the connecting arm supported by the movable sheave via the rolling bearing. Since the mounting member is located between the output member and the driving shaft in a direction perpendicular to the axis of the driving shaft, the mounting member can be disposed close to the driving shaft and is added to the connecting arm at the portion where the mounting member is disposed. The load can be reduced to reduce the size of the connecting arm. Moreover, since the mounting member is disposed at a position overlapping at least a part of the output member in the radial direction of the drive shaft, the connecting arm can be reduced in size in the axial direction of the drive shaft, and the drive shaft extends to the transmission case extending in the front-rear direction. Is mounted with an axis extending in the vehicle width direction, and the second member is fitted to the first member at a mating surface along a plane orthogonal to the axis of the drive shaft and has an axis parallel to the axis of the drive shaft Since the member is attached to the first member from the outside in the vehicle width direction, access to the attachment member from the outside is easy, and the attachment workability of the attachment member is improved.

  According to the second feature of the present invention, the boss formed on the first member for attaching the attachment member comes into contact with the transmission case, so that the output member moves in the direction pushed out from the actuator unit. Since the moving end is restricted, the number of parts can be reduced by making the boss part also function as a stopper. Moreover, since the boss portion is disposed closer to the drive shaft than the output member, even if a pressing force is applied from the output member to the connecting arm with an excessive force, the force in the direction of tilting the movable sheave is reduced. be able to.

According to the third feature of the present invention, the stopper formed on the second member abuts against the outer surface of the actuator unit, so that the moving end when the output member moves in the direction of being pulled back into the actuator unit is restricted. Therefore, the number of parts can be reduced by using the outer surface of the actuator unit. Moreover, since the stopper is disposed closer to the drive shaft than the output member, even if a pressing force is applied from the output member to the connecting arm with an excessive force, the force in the direction of tilting the movable sheave can be reduced. It is Ru can.

According to the fourth aspect of the present invention, the mounting member is arranged on a straight line connecting the driven shaft and the axis of the drive shaft arranged behind the drive shaft so as to be rotationally driven by the power transmitted from the V-belt. Therefore, it is possible to effectively prevent the V belt that swings up and down from interfering with the mounting member.

According to the fifth aspect of the present invention, the actuator unit is supported by the transmission case so as to be able to slide in a direction perpendicular to the axis of the drive shaft so as to advance from the rear side of the mounting member, Since the output member is engaged with and connected to the connecting arm at the forward movement position, the mounting member does not become an obstacle in the sliding movement direction when the actuator unit slides.

According to the sixth aspect of the present invention, the guide portion that guides the engaging portion is formed in the engaged portion provided in the second member so as to engage the engaging portion of the output member. Engagement of the engaging portion with the engaged portion can be facilitated.

According to the seventh aspect of the present invention, the transmission case that extends in the front-rear direction and is supported by the vehicle body frame abuts on the connection arm from below in a state where the engagement portion is detached from the engaged portion. Since the arm support portion for supporting the arm is provided, it is possible to support the connection arm from below with the arm support portion in a state where the engagement portion is detached from the engaged portion and to support the connection arm at a predetermined position. In addition, when the actuator unit is slid from the disengagement position to the engagement position, the engagement portion can be easily engaged with the engaged portion, and the attachment of the actuator unit is improved.

According to the eighth feature of the present invention, since the arm support part is separated from the connecting arm in a state where the engaging part is engaged with the engaged part, the movable sheave is driven in the axial direction by the movement of the output member. In this case, it is possible to prevent the connecting arm from sliding and coming into contact with the arm support portion to cause wear or noise.

Furthermore, according to the ninth feature of the present invention, the arm portion provided on the connecting arm abuts the output member at least from above in an engaged state of the engaging portion with the engaged portion, and the output member of this arm portion. Since the connecting arm is separated from the arm support portion by the contact with the arm, when the output member is connected to the connecting arm by engaging the engaging portion with the engaged portion, the connecting arm is lifted and separated from the output member. Thus, it is possible to prevent the connecting arm from sliding and coming into contact with the arm support portion to cause wear or abnormal noise.

1 is a side view of a motorcycle. It is a side view of a power unit. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. FIG. 4 is an enlarged view showing the vicinity of a drive pulley in FIG. 3. It is the figure which looked at the engagement of a connection arm and an output rod, and the connection state from the 5-5 line arrow direction of FIG. It is a perspective view of the to-be-engaged part of a connection arm. It is a figure which shows the principal part of FIG. 3 for demonstrating the assembly | attachment process of an actuator unit. It is the figure which looked at the case cover from the inner surface side.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. In the following description, front and rear, left and right, and top and bottom refer to directions viewed from a passenger who rides a motorcycle.

  First, in FIG. 1, this saddle-ride type vehicle is a scooter type motorcycle, and its body frame F operates a front fork 11 that pivotally supports a front wheel WF and a steering handle 12 connected to the front fork 11. A head pipe 13 that is supported in a forward direction is provided at the front end, and a power unit P that exerts power for driving the rear wheel WR is supported at a middle part in the front-rear direction of the body frame F so as to be swingable up and down.

  The power unit P includes an engine E disposed in front of the rear wheel WR, and a transmission M that transmits the output of the engine E to the rear wheel WR. The transmission M is connected to the engine body 14 of the engine E. The rear cushion unit 16 is provided between the rear portion of the transmission case 15 and the rear portion of the vehicle body frame F.

  The vehicle body frame F and a part of the power unit P are a vehicle body cover 17 having a pair of left and right footrests 18 on which occupants' feet are placed, and a floor tunnel portion 19 protruding upward between the footrests 18. The vehicle body cover 17 is covered and attached to the vehicle body frame F. Also, an occupant seat 20 disposed behind the floor tunnel portion 19 and a passenger seat 21 disposed behind the occupant seat 20 are disposed on the vehicle body cover 17.

  2 and 3 together, the engine body 14 of the engine E includes a crankcase 25 that rotatably supports a crankshaft 24 having an axis extending in the vehicle width direction, and a piston 29 that is slidable. A cylinder block 26 having a cylinder bore 30 to be fitted and coupled to the crankcase 25, a cylinder head 27 coupled to the cylinder block 26, and a head cover 28 coupled to the cylinder head 27 are provided. The cylinder axis C of the engine main body 14, that is, the axis of the cylinder bore 30 is slightly inclined forward and the piston 29 is connected to the crankshaft 24.

  An intake device 32 for supplying air to a combustion chamber 31 formed between the cylinder block 26 and the cylinder head 27 so as to face the top of the piston 29 is above the transmission case 15 on the left side of the rear wheel WR. And an air cleaner 33 supported by the transmission case 15 and a throttle body 34 disposed between the air cleaner 33 and the cylinder head 27, and a fuel injection valve 35 is provided on the upper side wall of the cylinder head 27. Mounted.

  As shown in FIG. 1, an exhaust device 36 for discharging exhaust gas from the combustion chamber 31 is connected to the lower side wall of the cylinder head 27, and the exhaust device 36 is connected to the lower side wall of the cylinder head 27. An exhaust pipe 37 extending rearward from the engine main body 14 to the rear, and an exhaust muffler (not shown) disposed on the right side of the rear wheel WR so as to be connected to the downstream end of the exhaust pipe 37 Is provided.

  The crankcase 25 is composed of a first case half 38 on the right side and a second case half 39 on the left side coupled to each other, and at the right end portion of the crankshaft 24 rotatably passing through the first case half 38. The outer rotor 40 is fixed, and the inner stator 41 surrounded by the outer rotor 40 so as to form the generator 42 together with the outer rotor 40 is fixed to the support plate 43 fastened to the first case half 38. .

  A cylindrical generator cover 44 surrounding the generator 42 is coupled to the first case half 38, and a radiator 45 is disposed on the right side of the generator cover 44. A cooling fan 46 for allowing cooling air to flow through the radiator 45 is fixed to the crankshaft 24 so as to be disposed between the generator 42 and the radiator 45.

  The transmission M accommodated in the transmission case 15 so as to transmit the rotational power of the crankshaft 24 to the rear wheel WR side is a V-belt that continuously changes the rotational power transmitted from the crankshaft 24. A continuously variable transmission 48 and a reduction gear mechanism 49 that reduces the rotational power of the V-belt continuously variable transmission 48 and transmits it to the axle 50 of the rear wheel WR. The rear wheel WR is disposed so as to be sandwiched between the transmission case 15 and a support arm 51 that is connected to the first case half 38 of the crankcase 25 and extends to the right side of the rear wheel WR. The both ends of the axle 50 are pivotally supported at the rear ends of the transmission case 15 and the support arm 51.

  The transmission case 15 is formed by fastening a plurality of case members that can be divided. In this embodiment, the transmission case 15 has a second case half 39 integrally therewith and a rear wheel from the left side wall of the crankcase 25. A case main body 52 as a first case member that extends rearward to the side of the WR and a transmission chamber 55 that accommodates the V-belt continuously variable transmission 48 are formed between the case main body 52 and the case main body 52. A case cover 53 as a second case member fastened to the case main body 52 and a gear chamber 56 for housing the reduction gear mechanism 49 are formed between the case main body 52 and the case main body 52. It is comprised with the gear cover 54 as a 3rd case member fastened by a rear part.

  The V-belt type continuously variable transmission 48 is housed in the transmission case 15 by being disposed behind the crankshaft 24 and a drive pulley 57 provided with a variable belt winding diameter on the crankshaft 24 as a drive shaft. A driven pulley 58 provided on the driven shaft 60, and an endless V-belt 59 wound around the drive pulley 57 and the driven pulley 58.

  In FIG. 4, the drive pulley 57 is supported on the crankshaft 24 so that the stationary sheave 61 fixed to the crankshaft 24 can be moved toward and away from the fixed sheave 61 in the direction along the axis of the crankshaft 24. The movable sheave 62 is disposed closer to the crankcase 25 than the fixed sheave 61.

  At the left end of the transmission case 15 on the case cover 53 side of the crankshaft 24, a nut 64 that sandwiches a washer 63 that abuts against the inner periphery of the fixed sheave 61 with the fixed sheave 61 is screwed. The On the other hand, an annular step portion 24a facing the fixed sheave 61 is formed on the outer periphery of the crankshaft 24 in the axial direction of the crankshaft 24 in the transmission chamber 55, and the inner peripheral portion is applied to the annular step portion 24a. A cylindrical sleeve 65 surrounding the crankshaft 24 is interposed between the weight holding plate 74 to be contacted and the fixed sheave 61, and the fixed sheave 61 is fixed to the crankshaft 24 by tightening the nut 64. The weight holding plate 74 is fixed.

  The fixed sheave 61 is integrally provided with a fan 66 for circulating cooling air into the transmission chamber 55, and the case cover 53 of the transmission case 15 is disposed at a position corresponding to the fixed sheave 61. In addition, an opening 67 is provided, and a suction cylinder portion 53a that surrounds the opening 67 and protrudes outward is integrally provided. A lid member 68 that closes the outer end of the suction cylinder portion 53 a is fastened to the suction cylinder portion 53 a by a plurality of first bolts 70, and the opening 67 is provided between the lid member 68 and the case cover 53. A cylindrical cleaner element 69 connected in an endless manner so as to surround is sandwiched and disposed in the suction cylinder portion 53a. A suction port 71 is provided on the rear side wall of the suction cylinder portion 53a.

  The movable sheave 62 is made of a light alloy such as aluminum, and is arranged coaxially with the crankshaft 24 while being axially movable and supported by the crankshaft 24 via the sleeve 65. The V-belt 59 is held between the cylindrical boss portion 62a and the fixed sheave 61 so as to project radially outward from one end portion of the boss portion 62a and on the opposite side of the fixed sheave 61. And a flange portion 62b formed in the shape of a flange that is open to the bottom. A cylindrical oil-impregnated bush 73 is interposed between the boss portion 62a and the sleeve 65.

  The movable sheave 62 is driven to the side closer to the fixed sheave 61 as the rotational speed of the crankshaft 24 increases due to the action of the centrifugal shift mechanism 72, and the centrifugal shift mechanism 72. The movable sheave 62 includes a cam surface 76 that is formed on the opposite side of the flange portion 62b to the fixed sheave 61, and a cam surface 76 that is fixed to the crankshaft 24 and that is opposite to the movable sheave 62. An opposing weight holding plate 74 and a weight 75 held between the cam surface 76 and the weight holding plate 74 are provided.

  Protrusions 77 protruding inward in the radial direction are integrally formed at a plurality of locations in the circumferential direction on the opposite side to the fixed sheave 61 of the flange portion 62 b of the movable sheave 62. Further, clamping members 78 that clamp the projections 77 are attached to a plurality of circumferential positions on the outer periphery of the weight holding plate 74, and the weight holding plate 74 and the movable sheave 62 rotate together with the crankshaft 24. .

  In such a centrifugal shift mechanism 72, the weight 75 that is in rolling contact with the cam surface 76 moves outward in the radial direction of the crankshaft 24 due to an increase in centrifugal force that acts as the crankshaft 24 rotates. As a result, the movable sheave 62 moves to the fixed sheave 61 side.

  The movable sheave 62 is driven in the axial direction of the crankshaft 24 by the power of the electric motor 80 as an actuator in addition to the centrifugal shift mechanism 72, and is output by the power from the electric motor 80. An actuator unit 82 that moves the output rod 81 as a member in a direction parallel to the axis of the crankshaft 24 is attached to the outer surface of the case cover 53 in the transmission case 15.

The movable sheave 62 is communicated Yuia over arm 91 via a ball bearing 86 is a rolling bearing is supported, this connecting arm 91 is capable of engaging the output rod 81, connected With the output rod 81 engaged and connected to the arm 91, the axial movement of the output rod 81 is transmitted to the movable sheave 62.

The connection arm 91 includes a first member 93 attached to the ball bearing 86 and a second member attached to the first member 93 by a second bolt 95 which can be engaged with the output rod 81. 94.

An inner ring 86 a of the ball bearing 86 is supported by a bearing holder 90 that is attached to the outer periphery of the flange portion 62 b of the movable sheave 62 by a plurality of third bolts 96. The bearing holder 90 is fitted between the inner ring 86a and a cylindrical tube part 90a that supports the inner ring 86a by being fitted to the inner periphery of the inner ring 86a, and an annular step part 62c provided on the flange part 62b. Is integrally formed with a flange portion 90b projecting radially outward from an end portion of the cylindrical portion 90a opposite to the annular stepped portion 62c.

  Referring also to FIG. 5, the first member 93 is made of, for example, an aluminum alloy, and includes an annular portion 93a surrounding the ball bearing 86, and an extending portion extending rearward from the rear portion of the annular portion 93a. 93b integrally.

  An outer ring 86b of the ball bearing 86 is fitted into the annular portion 93a of the first member 93, and an annular step portion 93c formed on the inner periphery of the annular portion 93a and an inner portion of the annular portion 93a. It is sandwiched between the inner peripheral portion of an annular presser plate 98 in which a part of the outer periphery is engaged with engagement grooves 97 provided in two circumferential directions.

  The second member 94 is formed of, for example, an iron-based material, and the second bolt 95 extends the second presser plate 98 such that a part of the presser plate 98 is sandwiched between the extended portion 93 b of the first member 93. Fastened to portion 93b.

  A mating surface 93 d of the first member 93 toward the second member 94 side of the extending portion 93 b and a mating surface 94 a of the second member 94 to the extending portion 93 b are orthogonal to the axis of the crankshaft 24. A second bolt 95 is formed along the plane, and the second member 94 has an axis parallel to the axis of the crankshaft 24 in a state where a part of the pressing plate 98 is sandwiched between the mating surfaces 93d and 94a. Is attached to the first member 93 by an attachment operation from the outside in the vehicle width direction.

  In addition, as clearly shown in FIG. 4, the second bolt 95 is located between the output rod 81 and the crankshaft 24 in a direction orthogonal to the axis of the crankshaft 24 and the output in the radial direction of the crankshaft 24. It arrange | positions in the position which overlaps with at least one part (part on the front end side of the output rod 81 in this Embodiment) of the rod 81. FIG.

  As shown in FIG. 2, the second bolt 95 is disposed on a straight line L that connects the axis of the crankshaft 24 and the axis of the driven shaft 60 disposed behind the crankshaft 24.

  Further, a boss portion 93e for attaching the second bolt 95 is formed on the extending portion 93b of the first member 93, and movement when the output rod 81 moves in the direction in which it is pushed out from the actuator unit 82. As shown in FIG. 4, the end is regulated by the boss portion 93e coming into contact with the case main body 52 of the transmission case 15, and the case main body 52 is in contact with the boss portion 93e. The control protrusion 52a which can be made to project integrally.

By the way, the second member 94 is attached to the first member 93 with a single second bolt 95, and in order to prevent the second member 94 from rotating around the axis of the second bolt 95, between two members 94 and the first member 93, a knock pin 132 that penetrates the presser plate 98 is disposed at a position offset from the axis of the second bolt 95 is provided. The first member 93 and the presser plate 98, the are formed symmetrically with respect to straight line L, so be inverted 180 degrees is available, the first member 93 and the presser plate 98, the knock pin 132 Are formed so as to be disposed on both sides of the second bolt 95.

  Referring also to FIG. 6, the engaged member 92 is integrally provided on the second member 94 of the connecting arm 91 so as to be located on the rear side in the vehicle front-rear direction with respect to the second bolt 95. The engaged portion 92 is formed in a substantially U shape, and is vertically branched from the rear end portion of the second member 94 so as to sandwich the output rod 81 from above and below, and is disposed in a substantially U shape. The pair of upper and lower arms 99 and 100 are provided with locking recesses 101 and 102 opened rearward.

  On the other hand, the output rod 81 has an engaging portion 103 that can be engaged with the engaging recesses 101 and 102 of the engaged portion 92 from the rear along the vehicle front-rear direction in a bar shape vertically from the output rod 81. It is provided so as to protrude.

  A guide portion 99 a that is inclined so as to be in an upper position as it is separated from the crankshaft 24 is formed on the lower surface of the distal end portion of the upper arm portion 99 of the arm portions 99, 100. On the top surface of the part, a guide part 100a is formed which is inclined so as to become a lower position as the distance from the crankshaft 24 increases. That is, the guide rods 99a and 100a which are inclined so as to be separated from each other toward the rear while facing each other at the front end portions (rear end portions along the vehicle longitudinal direction) of the both arm portions 99 and 110 are the output rod 81 In order to guide the engaging portion 103 to the side that engages with the locking recesses 101 and 102, the insertion of the output rod 81 between the arm portions 99 and 100 from behind along the vehicle front-rear direction is guided. Formed.

  The case main body 52 of the transmission case 15 is in contact with the extended portion 93b of the first member 93 of the connecting arm 91 from below with the engaging portion 103 detached from the engaged portion 92. An arm support portion 104 that supports the connecting arm 91 is provided so as to extend in the axial direction of the crankshaft 24.

  Moreover, the arm support portion 104 is disposed so as to be separated from the connection arm 91 in a state where the engaging portion 103 is engaged with the engaged portion 92, and the engaged portion 92 is Of the pair of upper and lower arm portions 99, 100 provided, the guide portion 99a of the lower surface of the upper arm portion 99 is located above the output rod 81 in the process of engaging the engaging portion 103 with the engaged portion 92. The connection arm 91 is separated from the arm support portion 104 by abutting from the arm support portion 104. That is, in the process of engaging the engaging portion 103 with the engaged portion 92, the upper arm portion 99 abuts on the output rod 81 from above, so that the connecting arm 91 raises the engaged portion 92. So that the connecting arm 91 is separated from the arm support portion 104, and the arm portion 99 is brought into contact with the output rod 81 by the arm portion 99. Is provided on the connecting arm 91 so as to be separated from the arm support portion 104.

  By the way, the case main body 52 of the transmission case 15 is provided with an arm support portion 105 that can come into contact with the connecting arm 91 from above so as to make a pair with the arm support portion 104 in the vertical direction. When the actuator unit 82 is assembled to the transmission case 15 in a posture in which the axis of the crankshaft 24 is vertically aligned at the production factory, the connecting arm 91 rotates around the axis of the crankshaft 24. The function of preventing the occurrence of this problem is achieved in cooperation with the arm support portion 104 below the connecting arm 91.

  The arm support portions 104 and 105 may be provided integrally with the case main body 52, or a rod-like member is implanted in the case main body 52 to constitute the arm support portions 104 and 105. Also good.

  Referring also to FIG. 7, the actuator unit 82 has a unit case 106 attached to the outer surface of the case cover 53 in the transmission case 15, and the electric motor 80 is attached to the unit case 106. Into the case cover 53. The output rod 81 is inserted into the case cover 53 while being supported by the unit case 106 so as to be capable of axial movement in a direction parallel to the crankshaft 24, and into the unit case 106. A transmission mechanism 107 that converts the rotational motion of the electric motor 80 into the axial movement of the output rod 81 is accommodated.

  The second member 94 of the connecting arm 91 has a moving end when the output rod 81 is moved back in the actuator unit 82 with the moving end of the actuator unit 82 attached to the case cover 53. Stoppers 99b and 100b that are regulated by contacting the outer surface are formed. In this embodiment, the stoppers 99 b and 100 b are integrally projected on a pair of upper and lower arms 99 and 100 provided integrally with the second member 94, and the output rod 81 is attached to the unit case 106 of the actuator unit 82. An enclosing annular regulating surface 106b is formed so that the stoppers 99b and 100b can be brought into contact with each other.

  By the way, the moving end when the output rod 81 moves in the direction pushed out from the actuator unit 82 is regulated by the boss portion 93e coming into contact with the regulating projection 52a of the case main body 52, and the output rod 81 is The moving end when moving in the direction retracted into the actuator unit 82 is regulated by the stoppers 99b and 100b coming into contact with the annular regulating surface 106b. The movement to the restriction end is performed to confirm the initial position when the engine E is started, and the output rod 81 does not move to the restriction end in both directions in the normal shift range.

  The actuator unit 82 engages the engaging portion 103 of the output rod 81 with the engaged portion 92 of the connecting arm 91 from the rear side of the second bolt 95 so that the case cover of the transmission case 15 is engaged. An engagement position (position indicated by a chain line in FIG. 7) attached to the outside from 53 and an engagement release position in which the engagement portion 103 is detached from the engaged portion 92 in a non-attached state to the case cover 53 (Position shown by a solid line in FIG. 7) and is supported by the case cover 53 so as to be able to slide in a direction orthogonal to the axis of the crankshaft 24, and on the outer surface of the case cover 53. A flat mounting surface 108 for mounting the actuator unit 82 is formed.

  In assembling the actuator unit 82, the unit case 106 is mounted on the mounting surface so that the electric motor 80 and the output rod 81 are inserted into the case cover 53 as indicated by a solid arrow 119 in FIG. 108, after the actuator unit 82 is brought into the disengagement position, the actuator unit 82 is slid forward to the engagement position as indicated by a chain line arrow 120 in FIG. The unit case 106 may be fastened to the mounting surface 108 with a plurality of, for example, four fourth bolts 109 in a state where the unit case 106 is engaged with the engaged portion 92.

By the way, the transmission case 15 is formed by fastening the case main body 52, the case cover 53, and the gear cover 54 with a plurality of fastening members. In this embodiment, the case main body 52 includes the case cover 52 and the case cover 52. A plurality of fifth bolts 110 serving as a plurality of fastening members arranged at intervals on the outer periphery of 53, and a fastening member inserted between the crankshaft 24 and the driven shaft 60 in the middle part in the front-rear direction of the case cover 53 a sixth bolt 111 as, the case cover 53 is fastened by the sixth bolt 11 1 as the fastening member at the rear is inserted to the rear side of the said case cover 53 than the driven shaft 60. Also, the case main body 52 and the gear cover 54 is fastened to one another in the seventh bolt 11 2 of a plurality of fastening members.

  Among the fifth to eighth bolts 110, 111, 112, 113, the sixth bolt 111, which is a specific bolt arranged at a portion corresponding to the mounting surface 108, is partially in the side of the mounting surface 108. The case cover 53 has a recess 114 that is recessed inward of the case cover 53 with respect to the mounting surface 108, and the fastening seat surface 115 of the sixth bolt 111 is connected to the inner end of the case cover 53. The sixth bolts 111 are all disposed on the inner side of the case cover 53 with respect to the mounting surface 108.

  The case cover 53 is integrally provided with a cylindrical boss 141 that has a bolt insertion hole 140 that continues to the recess 114 and protrudes toward the case main body 52, and the tip of the boss 141 is abutted against the case cover 53. A fastening boss 142 to be brought into contact with the case main body 52 is integrally projected. The sixth bolt 111 is inserted into the bolt insertion hole 140 so that its enlarged diameter head portion 111a engages and abuts the fastening seat surface 115 in the recess 114, and is screwed into the fastening boss 142. The At this time, the entire enlarged diameter head portion 111 a of the sixth bolt 111 is accommodated in the recess 114.

  The unit case 106 of the actuator unit 82 is a shielding part that covers at least a part of the recess 114 from the outside in a state where the actuator unit 82 at the engagement position is attached to the attachment surface 108. A coupler 106a is provided. The shielding portion is not limited to the coupler 106a, and a bowl-shaped shielding wall may be formed on the unit case 106, and the shielding wall may be used as the shielding portion.

  Referring also to FIG. 8, the attachment surface 108 is formed with a first through hole 116 through which the electric motor 80 passes and a second through hole 117 through which the output rod 81 passes. The first and second through holes 116 and 117 are formed in a long hole shape that is long in the vehicle front-rear direction so as to allow the actuator unit 82 to slide.

  A rib 118 disposed between the first and second through holes 116 and 117 protrudes from the inner surface of the case cover 53. Further, ribs 138 arranged so as to surround the first and second through holes 116 and 117 are projected from the inner surface of the case cover 53, and both ends of the ribs 118 are integrally connected to the rib 138. .

  In FIG. 3 again, the driven pulley 58 includes a fixed sheave 121 fixed to a cylindrical inner cylinder 123 that is rotatably supported on the driven shaft 60 while coaxially surrounding the driven shaft 60. The movable sheave 122 is configured to be movable toward and away from the fixed sheave 121 by being fixed to an outer cylinder 124 that coaxially surrounds the inner cylinder 123 so as to be capable of relative movement and relative rotation with respect to the cylinder 123. Then, the V belt 59 is wound around the fixed sheave 121 and the movable sheave 122. A torque cam mechanism 125 is provided between the inner cylinder 123 and the outer cylinder 124 to apply an axial component force between the sheaves 121 and 122 in accordance with the relative rotational phase difference between the fixed sheave 121 and the movable sheave 122. The movable sheave 122 is elastically biased toward the fixed sheave 121 by the coil spring 126, and a power transmission state is established between the fixed sheave 121 and the driven shaft 60 as the engine speed exceeds the set speed. A centrifugal clutch 127 is provided.

  The axial distance between the fixed sheave 121 and the movable sheave 122 in the driven pulley 58 is the axial force generated by the torque cam mechanism 125, the axial elastic force generated by the coil spring 126, the fixed sheave 121 and the movable sheave 122. As determined by the balance with the force from the V-belt 59 acting in the direction of the interval between them, the winding radius of the V-belt 59 around the driven pulley 58 increases as the winding radius of the V-belt 59 around the driving pulley 57 increases. Becomes smaller.

  One end portion of the driven shaft 60 penetrating the case main body 52 in a liquid-tight and rotatable manner is rotatably supported by the case cover 53, and the other end portion of the driven shaft 60 is rotatable by the gear cover 54. Supported. One end of the axle 50 of the rear wheel WR penetrates the gear cover 54 in an airtight manner and enters the gear chamber 56. One end of the axle 50 is rotatably supported by the case main body 52 and the gear cover 54. The other end portion of the axle 50 is rotatably supported by the support arm 51.

  The reduction gear mechanism 49 is housed in the gear chamber 56 so as to be provided between the driven shaft 60 and the axle 50, and the rotational power from the crankshaft 24 is transmitted to the V-belt type continuously variable transmission. A drive gear 128 provided integrally with the driven shaft 60 transmitted through the machine 48 and the centrifugal clutch 127, a final gear 129 provided on the axle 50 of the rear wheel WR, the final gear 129 and the drive gear 128. The first and second idle gears 130 and 131 are disposed between the first and second idle gears 130 and 131.

Next, the operation of this embodiment will be described. The second member 94 that can be engaged with the output rod 81 in order to form the connecting arm 91 supported by the movable sheave 62 via the ball bearing 86. Is located between the output rod 81 and the crankshaft 24 in a direction perpendicular to the axis of the crankshaft 24, the second bolt 95 is disposed close to the crankshaft 24. The load applied to the connecting arm 91 at the portion where the second bolt 95 is disposed can be reduced, and the connecting arm 91 can be downsized. Moreover, since the second bolt 95 is disposed at a position overlapping with at least a part of the output rod 81 in the radial direction of the crankshaft 24, the connecting arm 91 can be reduced in size in the axial direction of the crankshaft 24.

  A boss portion 93e for attaching the second bolt 95 is formed on the first member 93, and a moving end when the output rod 81 moves in a direction to be pushed out from the actuator unit 82 is the transmission case of the boss portion 93e. The number of parts can be reduced by causing the boss portion 93e to function as a stopper. Moreover, since the boss portion 93e is disposed closer to the crankshaft 24 than the output rod 81, the movable sheave 62 is inclined even if a pressing force is applied from the output rod 81 to the connecting arm 91 with an excessive force. The force to the can be reduced.

  Further, the second member 94 is regulated by contacting the moving end when the output rod 81 moves back in the actuator unit 82 with the annular regulating surface 106b of the outer surface of the unit case 106 of the actuator unit 82. Since the stoppers 99b and 100b are formed, the number of parts can be reduced by using the outer surface of the unit case 106 of the actuator unit 82. Moreover, since the stoppers 99b and 100b are disposed closer to the crankshaft 24 than the output rod 81, the movable sheave 62 is tilted even if a pressing force is applied from the output rod 81 to the connecting arm 91 with an excessive force. The force in the direction can be reduced.

The crankshaft 24 is supported on the vehicle body frame F together with the engine body 14 so as to be swingable and extends in the front-rear direction. The crankshaft 24 is supported with an axis extending in the vehicle width direction and is orthogonal to the axis of the drive shaft. The second member 94 that is aligned with the first member 93 at the mating surface 94a along the plane is the first member by the mounting operation from the outside in the vehicle width direction of the second bolt 95 having an axis parallel to the axis of the crankshaft 24. Since it is attached to 93, access to the second bolt 95 from the outside is easy, and the workability of attaching the second bolt 95 is improved.

  A driven shaft 60 that is rotationally driven by the power transmitted from the V belt 59 is disposed behind the crankshaft 24 and accommodated in the transmission case 15, and connects the crankshaft 24 and the driven shaft 60. Since the second bolt 95 is arranged on the straight line L, it is possible to effectively prevent the V belt 59 swinging up and down from interfering with the second bolt 95.

  A direction orthogonal to the axis of the crankshaft 24 so that the actuator unit 82 in a state where the output rod 81 is disengaged from and connected to the connecting arm 91 from the rear side of the second bolt 95 is advanced. Since the actuator unit 82 is supported by the case cover 53 of the transmission case 15 and the output rod 81 is engaged and connected to the connecting arm 91 at the advanced position of the actuator unit 82, When the actuator unit 82 slides, the second bolt 95 does not get in the way in the sliding direction.

The actuator unit 82 engages the engaging portion 103 of the output member 81 with the engaged portion 92 of the connecting arm 91 so as to transmit the movement of the output rod 81 to the movable sheave 62. The front engagement position attached to the case cover 53 from the outside, and the rear engagement release position where the engagement portion 103 is detached from the engaged portion 92 in a non-attached state to the case cover 53 And is supported by the case cover 53 of the transmission case 15 so as to be able to slide in a direction perpendicular to the axis of the crankshaft 24, and the actuator unit 82 is mounted on the outer surface of the case cover 53. A flat mounting surface 108 for mounting is formed, and the inside of the case cover 53 is located more than the mounting surface 108. A recessed portion 114 that is recessed is disposed in a portion corresponding to the mounting surface 108 of the case main body 52 constituting the transmission case 15, and the fifth to eighth bolts 110 to 113 that fasten the case cover 53 and the gear cover 54. Since the sixth bolt 111 is formed so as to have the fastening seat surface 115 at the inner end, and all the sixth bolts 111 are disposed on the inner side of the case cover 53 with respect to the mounting surface 108, the actuator unit 82. sixth bolt 111 does not protrude from the mounting surface 108 outwardly disposed around the. Therefore, the actuator unit 82 can be brought into sliding contact with the entire mounting surface 108 including the portion where the recess 114 is disposed, and a sufficient space for sliding the actuator unit 82 can be secured. The workability of the removal work can be improved.

  Further, the actuator unit 82 is provided with a coupler 106a that is a shielding portion that covers at least a part of the recess 114 from the outside in a state where the actuator unit 82 in the engagement position is attached to the attachment surface 108. Therefore, unless the actuator unit 82 is removed from the transmission case 15, it is difficult to release the fastening of the sixth bolt 111, and the engaging portion 103 on the actuator unit 82 side and the engaged portion on the movable sheave 62 side can be prevented. It is possible to prevent the transmission case 15 from being forcibly disassembled in a state where the 92 is engaged.

In addition, since the first through hole 116 through which the electric motor 80 passes and the second through hole 117 through which the output rod 81 passes are formed in the mounting surface 108 so as to be separated from each other, the first and second The rigidity of the case cover 53 can be increased by interposing a part of the side wall of the case cover 53 between the through holes 116 and 117. Therefore, the actuator unit 82 can be supported so as to sufficiently withstand the load from the actuator unit 82 when the movable sheave 62 is moved in the axial direction of the crankshaft 24, and the movable sheave 62 can be accurately moved by the output rod 81. Can be made.

  In addition, since the rib 118 disposed between the first and second through holes 116 and 117 protrudes from the inner surface of the case cover 53, the rigidity of the case cover 53 can be further increased.

  Further, an engaged portion 92 that engages the engaging portion 103 provided on the output rod 81 is provided on the second member 94 of the connecting arm 91, and as the engaged portion 92 moves away from the crankshaft 24. Since the guide portion 99a inclined so as to be in the upper position is formed so as to guide the engaging portion 103, the engaging portion 103 can be easily engaged with the engaged portion 92. . In addition, in this embodiment, in addition to the guide part 99a, the guide part 100a inclined so as to become a lower position as the distance from the crankshaft 24 is added to the engaged part 92. Since it forms so that it may guide, engagement of the engaging part 103 to the to-be-engaged part 92 can be made easier.

  In addition, an arm support portion 99 that contacts the connecting arm 91 from below and supports the connecting arm 91 in a state where the engaging portion 103 is detached from the engaged portion 92 is attached to the case main body 52 of the transmission case 15. Thus, the connecting arm 91 can be supported from below by the arm support portion 99 with the engaging portion 103 detached from the engaged portion 92, and the connecting arm 91 can be supported at a predetermined position. When the unit 82 is slid from the disengaged position to the engaged position, the engaging portion 103 can be easily engaged with the engaged portion 92, and the attachment of the actuator unit 82 is improved.

  Further, since the arm support portion 99 is disposed so as to be separated from the connecting arm 91 in a state where the engaging portion 103 is engaged with the engaged portion 92, the movable sheave 62 is moved by the movement of the output rod 81. When the arm is driven in the axial direction, it is possible to prevent the connecting arm 91 from slidingly contacting the arm support portion 99 and causing wear or noise.

  Further, an arm portion 99 that abuts the output rod 81 from above in the process of engaging the engagement portion 103 with the engaged portion 92 causes the connecting arm to contact the output rod 81. 91 is provided on the connecting arm 91 so as to be separated from the arm support portion 99, so that when the engaging portion 103 is engaged with the engaged portion 92 and the output rod 81 is connected to the connecting arm 91, the connecting portion 91 is connected. By lifting the arm 91 away from the output rod 81, it is possible to prevent the connecting arm 91 from slidingly contacting the arm support 99 and causing wear or noise.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. Is possible.

  For example, in the above-described embodiment, the second bolt 95, which is an attachment member, has an axis parallel to the axis of the crankshaft 24 and is attached from the outside in the vehicle width direction. The second bolt may be attached to the second bolt, or the axis of the second bolt may be orthogonal to the axis of the crankshaft 24.

DESCRIPTION OF SYMBOLS 15 ... Transmission case 24 ... Crankshaft 59 which is a drive shaft ... V belt 60 ... Driven shaft 61 ... Fixed sheave 62 ... Movable sheave 81 ... Output rod which is an output member 82 ... Actuator unit 86 ... Ball bearing 91 which is a rolling bearing ... Link arm 92 ... Engagement part 93 ... First member 93e ... Boss part 94 ... Second member 94a ... mating surface 95 ... second bolt 99 which is a mounting member ... arm 99a ... guide 99b, 100b ... stopper 103 ... engagement part 104 ... arm support 106b: Annular regulating surface F that is an outer surface of the actuator unit F ... Body frame L ... Straight line

Claims (9)

A fixed sheave (61) fixed to the drive shaft (24), and supported by the drive shaft (24) to be able to approach and separate from the fixed sheave (61) in a direction along the axis of the drive shaft (24). A movable sheave (62), a connecting arm (91) supported by the movable sheave (62) via a rolling bearing (86), and the fixed sheave (61) and the movable sheave (62). The V-belt (59) is accommodated in the transmission case (15), and the output member (81) that can engage with the connecting arm (91) is driven by the power from the actuator (80) of the drive shaft (24). An actuator unit (82) adapted to move in a direction parallel to the axis line moves the output member (81) to the movable sheave (62) and the connecting arm (91) and the rolling bearing (86). The connecting arm (91) is attached to the first member (93) attached to the rolling bearing (86) and the output member (81). In the V-belt continuously variable transmission configured to be configured to be engaged with the first member (93) and the second member (94) attached to the first member (93) with the attachment member (95),
The transmission case (15) extending in the front-rear direction is supported by the body frame (F) of the saddle-ride type vehicle, and the drive shaft (24) has an axis extending in the vehicle width direction. The mounting member (95) is supported and is located between the output member (81) and the drive shaft (24) in a direction orthogonal to the axis of the drive shaft (24) and the radius of the drive shaft (24). In the direction, the output member (81) is disposed at a position overlapping at least a part of the output member (81), and is aligned with the first member (93) at a mating surface (94a) along a plane orthogonal to the axis of the drive shaft (24) The second member (94) is attached to the first member (93) by an attachment operation from the outside in the vehicle width direction of the attachment member (95) having an axis parallel to the axis of the drive shaft (24). V belt type featuring Variable transmission.   A boss portion (93e) for attaching the attachment member (95) is formed on the first member (93), and the output member (81) is moved in a direction to be pushed out from the actuator unit (82). The V-belt type continuously variable transmission according to claim 1, wherein the moving end is regulated by contact of the boss portion (93e) with the transmission case (15).   A moving end of the second member (94) when the output member (81) is moved back in the actuator unit (82) contacts the outer surface (106b) of the actuator unit (82). The V-belt type continuously variable transmission according to claim 1 or 2, wherein a stopper (99b, 100b) for regulating is formed. A driven shaft (60) that is rotationally driven by the power transmitted from the V-belt (59) is disposed behind the drive shaft (24) and accommodated in the transmission case (15), and the drive shaft (24 ) and Mu V-belt according to any one of claims 1 to 3, a straight line connecting the axis (L) the mounting member (95 on) is being arranged in the driven shaft (60) Step transmission. The drive shaft so that the actuator unit (82) in a state where the output member (81) is disengaged from and engaged with the connection arm (91) is advanced from the rear side of the attachment member (95). The actuator unit (82) is supported by the transmission case (15) so as to be able to slide in a direction orthogonal to the axis of (24), and the output member (81) is moved at the forward position of the actuator unit (82). The V-belt type continuously variable transmission according to any one of claims 1 to 4, wherein the V-belt continuously variable transmission is engaged with and connected to the connecting arm (91). An engaged portion (92) for engaging an engaging portion (103) provided on the output member (81) is provided on the second member (94), and the driven portion (92) is driven by the drive. guide portion inclined so that the upper position as away from the axis (24) (99a) is, according to claim 5, characterized in by being formed so as to guide the engaging portion (103) V belt type continuously variable transmission. An arm support portion (104) that supports the connection arm (91) by contacting the connection arm (91) from below with the engagement portion (103) being disengaged from the engaged portion (92). The V-belt type continuously variable transmission according to claim 6 , wherein the V-belt continuously variable transmission is provided in the transmission case (15). The arm support portion (104) is disposed so as to be separated from the connection arm (91) when the engagement portion (103) is engaged with the engaged portion (92). The V-belt type continuously variable transmission according to claim 7 . An arm portion (99) that comes into contact with the output member (81) from above in the process of engaging the engagement portion (103) with the engaged portion (92) is the output member of the arm portion (99). The V according to claim 8 , wherein the connecting arm (91) is provided on the connecting arm (91) such that the connecting arm (91) is separated from the arm support portion (104) by contact with the connecting arm (81). Belt type continuously variable transmission.

Images