Saddle-type vehicle

Abstract

This reduces disturbances to the regulator used in adjusting the tension of an endless member. [Solution] The saddle-type vehicle comprises a substantially cylindrical holder support portion (52) provided at the tip of a swing arm (16), an eccentric holder (54) rotatably housed inside the holder support portion (52) and having an axle hole (58) for supporting an axle (15a) at an eccentric position with respect to the center of rotation, an adjuster (106) for adjusting the rotational position of the eccentric holder (54) relative to the holder support portion (52), a driven rotating member (64) that rotates integrally with the wheel (15), and an endless member (64a). The eccentric holder (54) is provided with an adjuster housing portion (100), and the driven rotating member (64) is provided adjacent to the eccentric holder (54) on one side of the eccentric holder (54) in the axle axis direction, and the adjuster housing portion (100) is open on the other side in the axle axis direction and closed on one side in the axle axis direction.

Description

Technical Field

[0001] The present invention relates to a saddle-type vehicle.

Background Art

[0002] Conventionally, a mechanism for adjusting the tension of a chain by rotating an eccentric holder and adjusting the rotational position of the eccentric holder with an adjuster and an adjustment bolt is known (see, for example, Patent Document 1). Patent Document 1 describes a swing arm provided with a bearing housing corresponding to the eccentric holder. In Patent Document 1, a circular hole is provided in the end face of the bearing housing that suspends the rear two wheels, a cylindrical body as an adjuster is inserted into the circular hole, and this cylindrical body is attached to the head of a bolt. Then, in Patent Document 1, the rotational position of the bearing housing is adjusted by moving the cylindrical body on the axis of the bolt, thereby adjusting the tension of the chain.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the technique such as Patent Document 1, application to a saddle-type vehicle in which a wheel and an eccentric holder are arranged adjacent to each other is not considered. That is, when the adjustment bolt and the adjuster that moves on the axis of the adjustment bolt as the adjustment bolt rotates are arranged adjacent to a rotating member such as a wheel or a driven rotating member, there is a problem that disturbance to the adjuster is likely to occur. The present invention has been made in view of the above circumstances, and an object thereof is to provide a saddle-type vehicle capable of reducing disturbance to an adjuster used in adjusting the tension of an endless member.

Means for Solving the Problems

[0005] The saddle-type vehicle comprises a swing arm that rotatably supports a wheel via an axle, a substantially cylindrical holder support portion provided at the tip of the swing arm, an eccentric holder rotatably housed inside the holder support portion and having an axle hole for supporting the axle at an eccentric position with respect to the center of rotation, an adjuster for adjusting the rotational position of the eccentric holder relative to the holder support portion, an adjustment bolt that engages with the adjuster and moves the adjuster, a driven rotating member fixed to the wheel and rotating integrally with the wheel, and an endless member stretched across the driven rotating member and transmitting the rotational power of the prime mover to the driven rotating member, wherein the tension of the endless member is adjusted by rotating and fixing the eccentric holder to the holder support portion. In a saddle-type vehicle, the holder support portion is provided with an insertion hole through which the adjustment bolt is inserted, the eccentric holder is provided with a bolt housing portion that houses the adjustment bolt inserted through the insertion hole, and an adjuster housing portion that extends parallel to the axle and communicates with the bolt housing portion, the adjuster is configured to be movable on the axis of the adjustment bolt, and the rotational position of the eccentric holder relative to the holder support portion is adjusted by the adjustmenter housed in the bolt housing portion moving on the axis of the adjustment bolt, the driven rotating member is provided adjacent to the eccentric holder on one side of the eccentric holder in the axle axis direction, and the adjuster housing portion is open on the other side in the axle axis direction and closed on one side in the axle axis direction. [Effects of the Invention]

[0006] This invention provides a saddle-type vehicle that can reduce disturbances to the adjuster used in adjusting the tension of an endless member. [Brief explanation of the drawing]

[0007] [Figure 1] This is a side view of a saddle-type vehicle according to an embodiment. [Figure 2] This is a left side view of the swingarm and rear wheel. [Figure 3] This is a perspective view showing the left side of the rear end of the swingarm. [Figure 4]This is a perspective view of the swingarm. [Figure 5] This is a right side view of the rear end of the swingarm. [Figure 6] This is a cross-sectional view taken from VI-VI in Figure 2. [Figure 7] This is a cross-sectional view taken along line VII-VII in Figure 2. [Modes for carrying out the invention]

[0008] Embodiments of the present invention will be described below with reference to the drawings. In the description, directions such as front, back, left, right, and up and down refer to directions relative to the vehicle body unless otherwise specified. In each figure, the symbol FR indicates the front of the vehicle body, the symbol UP indicates the top of the vehicle body, and the symbol LH indicates the left side of the vehicle body.

[0009] [Embodiment] Figure 1 is a side view of a saddle-type vehicle 10 according to an embodiment of the present invention. The saddle-type vehicle 10 is a vehicle that comprises a body frame 11, a power unit 12 supported by the body frame 11, a front fork 14 that supports the front wheel 13 in a steerable manner, a swing arm 16 that supports the rear wheel 15, and a seat 17 for the rider. The saddle-type vehicle 10 is a vehicle in which the occupant sits straddling a seat 17. The seat 17 is located above the rear of the vehicle frame 11.

[0010] The vehicle frame 11 comprises a head pipe 18 located at the front end of the vehicle frame 11, a front frame 19 located behind the head pipe 18, and a rear frame 20 located behind the front frame 19. The front end of the front frame 19 is connected to the head pipe 18. The seat 17 is supported by the rear frame 20.

[0011] The front fork 14 is supported by a head pipe 18 so that it can be steered left and right. The front wheel 13 is supported by an axle 13a located at the lower end of the front fork 14. A steering handle 21, which is held by the rider, is attached to the upper end of the front fork 14.

[0012] The swingarm 16 is supported by a pivot shaft 22 which is supported by the vehicle frame 11. The pivot shaft 22 is an axis that extends horizontally in the vehicle width direction. The pivot shaft 22 is inserted through the front end of the swingarm 16. The swingarm 16 swings up and down around the pivot shaft 22. The rear wheel 15 is supported by an axle 15a located at the rear end of the swing arm 16.

[0013] The power unit 12 is positioned between the front wheels 13 and the rear wheels 15 and is supported by the vehicle frame 11. The power unit 12 is an internal combustion engine. The power unit 12 comprises a crankcase 23 and a cylinder section 24 that houses a reciprocating piston. An exhaust device 25 is connected to the exhaust port of the cylinder section 24. The output of the power unit 12 is transmitted to the rear wheels 15 by a drive force transmission member that connects the power unit 12 to the rear wheels 15.

[0014] Furthermore, the saddle-type vehicle 10 is equipped with a front fender 26 that covers the front wheel 13 from above, a rear fender 27 that covers the rear wheel 15 from above, a step 28 on which the rider places their feet, and a fuel tank 29 that stores the fuel used by the power unit 12. The front fender 26 is attached to the front fork 14. The rear fender 27 and footpeg 28 are positioned below the seat 17. The fuel tank 29 is supported by the vehicle frame 11.

[0015] A drive pulley 32 is fixed to the output shaft of the power unit 12. An endless pulley belt 64a is wound around the drive pulley 32. The pulley belt 64a extends from the drive pulley 32 toward the rear wheel 15 and is wound around a driven pulley 64 provided on the rear wheel 15. When the drive pulley 32 rotates by the power unit 12, the driven pulley 64 rotates via the pulley belt 64a, and a rotational force as a driving force is transmitted to the rear wheel 15. The rear wheel 15 is an example of a wheel. The driven pulley 64 is an example of a driven rotating member. The pulley belt 64a is an example of an endless member that transmits the rotational force of the power unit 12 to the driven pulley 64. The power unit 12 is an example of a prime mover.

[0016] FIG. 2 is a left side view showing the swing arm 16 and the rear wheel 15. FIG. 3 is a perspective view showing the left side of the rear end of the swing arm 16. FIG. 4 is a perspective view of the swing arm 16 viewed from the right rear. FIG. 5 is a right side view showing the rear end of the swing arm 16. FIG. 6 is a sectional view taken along line VI-VI of FIG. 2. FIG. 7 is a sectional view taken along line VII-VII of FIG. 2. In FIGS. 2 to 7, the illustration of members is appropriately omitted. Specifically, in FIGS. 2 and 3, the driven pulley 64 is omitted. In FIGS. 4 and 5, the axle 15a is omitted.

[0017] Next, the swing arm 16 that suspends and supports the rear wheel 15 will be described in detail. As shown in FIGS. 2 and 4, the swing arm 16 includes an arm base end portion 30 that extends in the front-rear direction and is formed in a substantially U shape at the front end portion. A pivot shaft 22 that extends in the vehicle width direction is inserted through the front end portion of the arm base end portion 30.

[0018] On the upper surface of the rear end portion of the arm base end portion 30, a rear shock support portion 34 that protrudes upward is formed. The lower end of a rear shock absorber 36 is swingably connected to the rear shock support portion 34 via a support shaft 34a. The upper end of the rear shock absorber 36 is swingably connected to the rear frame 20. A covering portion 34b is provided on the left side of the support shaft 34a to cover the support shaft 34a that protrudes from the rear shock support portion 34.

[0019] The swing arm 16 includes an arm portion 38 that extends rearward from the left side of the arm base end portion 30.

[0020] A joint portion 42 is fixed to the upper surface of the arm base end portion 30, specifically on the front side of the rear shock support portion 34, to relay the brake hose 40 extending from the brake caliper 82. The brake hose 40 extending from the joint portion 42 is routed along the upper surface of the swingarm 16. The brake hose 40 extending from the joint portion 42 is also relayed by a joint portion 44 located behind the joint portion 42.

[0021] The rear end of the swingarm 16 supports the rear wheel 15 via an axle 15a. The axle 15a can also be referred to as the axle. In this way, the swingarm 16 is configured as a cantilever swingarm that supports the rear wheel 15 from the side by an arm portion 38 extending rearward from one side of the vehicle body. Referring to Figure 3, the axle 15a comprises a cylindrical axle portion 46 extending in the vehicle width direction and an axle nut 48 formed at the left end of the axle portion 46. The axle nut 48 bulges radially relative to the axle portion 46. The axle 15a also comprises an axle flange 50 formed at the right end of the axle portion 46, which extends substantially circularly in the radial direction of the axle portion 46.

[0022] The vehicle width direction can also be described as the left-right direction or the axle direction. One axle direction corresponds to the left side, and the other axle direction corresponds to the right side.

[0023] Referring to Figures 3 and 4, the arm portion 38 is provided with a cylindrical holder support portion 52 extending in the vehicle width direction at its rear end. The rear end of the arm portion 38 is an example of the tip of the swing arm 16. The holder support portion 52 is formed with an opening in the vehicle width direction. The rear end of the holder support portion 52 is split vertically to form a clamping portion. A cylindrical eccentric holder 54 is rotatably housed inside the holder support portion 52. Two clamping fasteners 56 are screwed into the rear end of the holder support portion 52 from top to bottom. When the two clamping fasteners 56 are tightened, the eccentric holder 54 is pressed against the holder support portion 52, and its rotation is restricted. In other words, the eccentric holder 54 is rotatably supported by the holder support portion 52, but is fixed to the holder support portion 52 when the clamping fasteners 56 are tightened.

[0024] Referring to Figure 6, the eccentric holder 54 has an axle hole 58 through which the axle portion 46 is inserted. The axle hole 58 is formed at an eccentric position from the circular center of the eccentric holder 54. The axle hole 58 consists of a circular axle hole 58L formed on the left side of the eccentric holder 54 and a circular axle hole 58R formed on the right side. The configuration of the left side of the arm portion 38 of the swing arm 16 will be described in detail below. A left bearing 60, which supports the axle portion 46, is positioned at the left end of the axle hole 58 of the eccentric holder 54.

[0025] As shown in Figure 6, the axle portion 46 is positioned to protrude to the left of the left bearing 60. This positions the axle portion 46 to protrude to the left of the swing arm 16. A spline 62 with irregularities is formed on the outer circumferential surface of the axle portion 46 that protrudes from the swing arm 16. The spline 62 extends in the axial direction. The hub 66 of the driven pulley 64 is inserted into the axle portion 46. The hub 66 is attached to the center of the driven pulley 64. The irregularities of the hub 66 and the spline 62 fit together. As a result, the axle 15a and the driven pulley 64 rotate as a single unit.

[0026] The hub 66 may also be equipped with a so-called hub damper. In this embodiment, the hub 66 is not equipped with a hub damper, so the distance between the driven pulley 64 and the swing arm 16 is closer. More specifically, the hub 66 is positioned adjacent to the holder support portion 52, and the inner end of the driven pulley 64 in the vehicle width overlaps with the holder support portion 52 in a rear view.

[0027] Washers 67 and collars 68 are provided to fill the gap between the hub 66 and the axle nut 48 and to adjust their relative positions. The dust seal 69 prevents foreign matter from entering the gap between the hub 66 and the axle portion 46. A collar 70 is sandwiched between the hub 66 and the left bearing 60. Washers 67, collars 68, and dust seals 69 are sandwiched between the hub 66 and the axle nut 48.

[0028] In this manner, the driven pulley 64 is positioned adjacent to the left side of the arm portion 38. When the driven pulley 64 rotates, the axle 15a and the rear wheel 15 rotate together as a single unit.

[0029] Next, the configuration of the right side of the arm section 38 will be described in detail. As shown in Figure 6, an extended portion 72 is formed on the right side of the axle hole 58 of the eccentric holder 54, extending cylindrically to the right. Inside the extended portion 72, a right bearing 74 that supports the axle portion 46 is positioned.

[0030] Referring to Figures 2, 3, and 6, an axle flange 50 is positioned on the right side of the arm portion 38 of the swingarm 16. The axle flange 50 is positioned with a gap from the tip (right end) of the extension portion 72. The brake disc 76 and the rear wheel 15 are fastened to the axle flange 50.

[0031] The brake disc 76 is mounted on the left side of the axle flange 50. The left end face of the brake disc 76 and the tip of the extension portion 72 are located on approximately the same plane. A pulsar ring 78 is mounted on the left side of the brake disc 76.

[0032] As shown in Figures 4 and 5, a plate-shaped caliper bracket 80 extending in the front-rear direction is provided on the right side of the arm portion 38 of the swingarm 16. The caliper bracket 80 supports the brake caliper 82 at its lower end. A brake hose 40 extending from the joint portion 44 is connected to the brake caliper 82.

[0033] A locking portion 84 is formed at the front end of the caliper bracket 80. A rectangular hole is formed in the locking portion 84. The locking portion 84 engages with a locking piece 86 that protrudes from the right side of the arm portion 38 of the swing arm 16. The extension portion 72 is inserted through the circular bracket insertion hole 88 of the caliper bracket 80. The caliper bracket 80 is rotatably supported with respect to the extension portion 72, but the locking piece 86 restricts the rotation of the caliper bracket 80 relative to the swing arm 16. The bracket insertion hole 88 is an example of an insertion hole.

[0034] The longitudinal dimension of the locked portion 84 is larger than the longitudinal dimension of the locking piece 86. Therefore, even if the distance between the driven pulley 64 and the drive pulley 32 changes, the caliper bracket 80 can move in direction F1 relative to the swing arm 16.

[0035] As shown in Figure 6, the caliper bracket 80 is positioned between the axle flange 50 and the right side of the swingarm 16. More specifically, the caliper bracket 80 is positioned to the left of the pulsar ring 78.

[0036] An annular groove 90 is formed as a recess on the outer circumferential surface at the right end of the extension portion 72. The annular groove 90 extends across the entire outer circumferential surface of the extension portion 72. An annular circlip 92 is fitted into the annular groove 90 so as to abut against the caliper bracket 80. The circlip 92 prevents the caliper bracket 80 from coming off the extension portion 72. The circlip 92 is an example of a locking member.

[0037] Next, the configuration of the eccentric holder 54 will be described in detail. In particular, as shown in Figure 6, the axle hole 58 of the eccentric holder 54 supports the axle portion 46 eccentrically from the central axis P of the cylindrical eccentric holder 54. In this way, the eccentric holder 54 is provided on the holder support portion 52 so as to be eccentrically rotatable with respect to the central axis Q of the axle 15a.

[0038] As shown in Figures 3, 4, and 7, a cylindrical through-hole 96 through which the adjustment bolt 94 is inserted is formed on the upper surface of the holder support portion 52, rearward from the axle 15a. Also, as shown in Figure 7, a bolt housing portion 98 is formed in the eccentric holder 54 to accommodate the adjustment bolt 94. The bolt housing portion 98 is a hole formed to penetrate the adjustment bolt 94 in the axial direction. The space of the bolt housing portion 98 is formed so that the adjustment bolt 94 can move when the eccentric holder 54 rotates in conjunction with the rotation of the adjustment bolt 94. The bolt housing portion 98 has a fan-shaped slit when viewed from the side. The adjustment bolt 94 passes through the eccentric holder 54, and its head is formed on a flat seating surface.

[0039] The eccentric holder 54 has a regulator housing portion 100 that houses a cylindrical regulator 106, which is parallel to the axle 15a and communicates with the bolt housing portion 98.

[0040] Furthermore, "parallel to the axle 15a" means that the longitudinal direction of the adjuster housing 100 is parallel to the axle 15a, and includes cases where the adjuster housing 100 is not strictly parallel to the axle 15a due to processing errors or manufacturing errors. In other words, "parallel to the axle 15a" also includes cases where the longitudinal direction of the adjuster housing 100 is tilted relative to the axle 15a due to processing errors or manufacturing errors.

[0041] The regulator housing 100 has a bottom 102 on the left side where the driven pulley 64 is positioned, and an opening 104 on the right side where the rear wheel 15 is positioned. In other words, the regulator housing 100 is formed in the shape of a bottomed hole that is closed on the driven pulley 64 side of the eccentric holder 54. When assembling the regulator 106 to the eccentric holder 54, the regulator 106 is inserted through the opening 104.

[0042] As shown in Figure 5, a portion of the opening 104 and the caliper bracket 80 overlap in an axial view. A portion of the opening 104 is covered by the caliper bracket 80.

[0043] As shown in Figure 7, the adjuster 106 is provided so as to be movable along the axis of the adjustment bolt 94 as the adjustment bolt 94 rotates. The adjuster 106 engages with the threaded portion formed on the outer circumferential surface of the adjustment bolt 94.

[0044] The adjuster housing portion 100 is formed in the shape of an elongated hole when viewed in the axial direction of the axle 15a. The axial view is the line of sight when viewing the axle 15a in the direction of its central axis.

[0045] The adjuster 106 contacts the inner wall of the adjuster housing 100, and as the adjuster 106 moves with the rotation of the adjustment bolt 94, the adjuster 106 moves while pushing against the inner wall of the adjuster housing 100. At this time, the eccentric holder 54 rotates eccentrically with respect to the central axis Q of the axle 15a due to the push of the adjuster 106. As the eccentric holder 54 rotates, the distance between the driven pulley 64 and the drive pulley 32 of the power unit 12 changes. The adjuster 106 can also be called an adjustment nut. As shown in Figure 7, the length L2 of the adjuster 106 in the vehicle width direction is greater than the length L1 from the right end (other axial end) of the adjuster housing 100, i.e., the right end (other end) of the opening 104 to the circlip 92.

[0046] When the clamping fastener 56 is loosened, the bearing pressure on the holder support portion 52 is reduced, allowing the eccentric holder 54 to rotate. In this state, when the adjustment bolt 94 is rotated, the eccentric holder 54 rotates eccentrically in direction F2 as shown in Figure 5, and the tension of the pulley belt 64a can be adjusted. At this time, the distance between the axle 15a and the drive pulley 32 of the power unit 12 changes, so the locking piece 86 of the swing arm 16 moves relative to the caliper bracket 80 in direction F1 as shown in Figure 5. As the distance between the axle 15a and the drive pulley 32 changes, the caliper bracket 80 moves in the direction F1. At this time, it can also be explained that the locking piece 86 moves relative to the locking portion 84 of the caliper bracket 80. Even when the tension of the pulley belt 64a is high, the tension of the pulley belt 64a can be easily adjusted by simply rotating the adjustment bolt 94 with a tool or the like.

[0047] Furthermore, when the eccentric holder 54 is restricted from rotating by the holder support portion 52, the adjustment bolt 94 can be removed. When the adjustment bolt 94 is removed, the adjuster 106 becomes movable within the adjuster housing portion 100. Since the opening 104 of the adjuster housing portion 100 is partially covered by the caliper bracket 80, the adjuster 106 does not fall out. The adjustment bolt 94 may be removed or left inserted, depending on the preference of the user of the saddle-type vehicle 10.

[0048] As described above, the saddle-type vehicle 10 according to this embodiment to which the present invention is applied comprises a swing arm 16 that rotatably supports the rear wheel 15 via an axle 15a, a substantially cylindrical holder support portion 52 provided at the tip of the swing arm 16, an eccentric holder 54 rotatably housed inside the holder support portion 52 and provided with an axle hole 58 that supports the axle 15a at an eccentric position with respect to the center of rotation, an adjuster 106 that adjusts the rotational position of the eccentric holder 54 with respect to the holder support portion 52, an adjustment bolt 94 that engages with the adjuster 106 and moves the adjuster 106, a driven pulley 64 fixed to the rear wheel 15 and rotating integrally with the rear wheel 15, and a pulley belt 64a stretched across the driven pulley 64 and transmitting the rotational power of the power unit 12 to the driven pulley 64, wherein the eccentric holder 54 is connected to the holder support portion 52 In a saddle-type vehicle 10 in which the tension of the pulley belt 64a is adjusted by rotating and fixing it, the holder support portion 52 is provided with an insertion hole 96 through which an adjustment bolt 94 is inserted, and the eccentric holder 54 is provided with a bolt housing portion 98 that houses the adjustment bolt 94 inserted through the insertion hole 96, and an adjuster housing portion 100 that extends parallel to the axle 15a and communicates with the bolt housing portion 98, and the adjuster 106 is configured to be movable on the axis of the adjustment bolt 94, and the rotational position of the eccentric holder 54 relative to the holder support portion 52 is adjusted by the adjustmenter 106 housed in the bolt housing portion 98 moving on the axis of the adjustment bolt 94, and a driven pulley 64 is provided adjacent to the eccentric holder 54 on one side of the eccentric holder 54 in the axle axis direction, and the adjuster housing portion 100 is open on the other side in the axle axis direction and closed on one side in the axle axis direction.

[0049] With this configuration, since the adjuster housing 100 is closed on the driven pulley 64 side, it is possible to provide a saddle-type vehicle 10 that can reduce disturbances to the adjuster 106 used in adjusting the tension of the pulley belt 64a while ensuring ease of assembly of the adjuster 106.

[0050] Furthermore, the swingarm 16 is provided with a brake caliper 82 and a caliper bracket 80 that supports the brake caliper 82. The caliper bracket 80 is located adjacent to the eccentric holder 54 and is provided on the other side of the eccentric holder 54 in the axle axis direction. In an axial view of the axle 15a, the caliper bracket 80 is positioned so as to overlap with at least a portion of the adjuster housing 100.

[0051] With this configuration, by providing a caliper bracket 80 that is stationary relative to the swing arm 16 on the opening side of the adjuster housing 100, the caliper bracket 80 can be used to cover the opening side of the adjuster housing 100, making it easier to protect the adjuster 106 from the outside, and also preventing the adjuster 106 from popping out of the adjuster housing 100.

[0052] Furthermore, the through hole 96 is formed on the upper surface of the swing arm 16, behind the axis center of the axle 15a.

[0053] This configuration makes it easier to position the adjustment bolt 94 at the end of the saddle-type vehicle 10, thus making it easier for the operator to access the adjustment bolt 94.

[0054] Furthermore, the swingarm 16 is a cantilevered swingarm that supports the rear wheel 15 from one side of the axle.

[0055] This configuration allows for the provision of an adjuster 106, used for adjusting the tension of the pulley belt 64a, in a cantilevered swingarm while reducing disturbances.

[0056] [Other embodiments] The embodiments described above represent only one aspect of the present invention and can be modified and applied as needed without departing from the spirit of the invention.

[0057] In the embodiments described above, the power unit 12 of the saddle-type vehicle 10 is an internal combustion engine, but it is not limited to this. In other embodiments, the saddle-type vehicle 10 may be equipped with a battery or a motor as the prime mover, or it may be equipped with both a battery and an internal combustion engine. In other words, the saddle-type vehicle 10 may be an electric vehicle or a hybrid vehicle.

[0058] In the embodiment described above, the saddle-type vehicle 10 is configured to have one front wheel 13 and one rear wheel 15, but it is not limited to this configuration. The number of wheels on the saddle-type vehicle 10 can be changed as appropriate, as long as the adjuster 106 is provided adjacent to a rotating member such as a driven pulley 64.

[0059] In the above-described embodiment, the saddle-type vehicle 10 is configured to include a pulley belt 64a and a driven pulley 64, but it is not limited to this configuration. In other embodiments, the saddle-type vehicle 10 may be configured to include a drive chain as an example of an endless member and a driven sprocket as an example of a driven rotating member.

[0060] In the embodiment described above, the insertion hole 96 of the holder support portion 52 and the bolt housing portion 98 of the eccentric holder 54 are formed as cylindrical holes through which the adjustment bolt 94 passes, and the adjuster housing portion 100 is formed as an elongated hole in an axial view, but the embodiment is not limited to this. In other embodiments, the adjustment bolt 94 may be configured such that its angle changes in accordance with the rotation of the eccentric holder 54. In this case, a slit is formed in the bolt housing portion 98 of the swing arm 16 to match the trajectory of the movement of the adjustment bolt 94, and a slit is also formed in the adjuster housing portion 100. Furthermore, in this case, the head of the adjustment bolt 94 is formed on a spherical seating surface. In other embodiments, the adjustment bolt 94 may be configured to move without changing its angle in accordance with the rotation of the eccentric holder 54. In this case, a slit is formed in the bolt housing portion 98 of the swing arm 16 to match the trajectory of the movement of the adjustment bolt 94, and a slit is also formed in the adjuster housing portion 100. In this case, the head of the adjustment bolt 94 is formed on a flat seating surface.

[0061] In the above-described embodiment, the length L2 of the adjuster 106 in the vehicle width direction is greater than the length L2 from the other axial end of the adjuster housing 100, i.e., the other end of the opening 104, to the circlip 92. As described above, the circlip 92 is an example of a locking member. Furthermore, in other embodiments, the locking member may overlap with at least a part of the adjuster housing 100 in an axial view of the axle 15a. In this case, the locking member is formed to extend further in the radial direction of the axle 15a than the circlip 92 in the above-described embodiment. As a result, even if the position of the caliper bracket 80 shifts and the opening 104 of the adjuster housing 100 is exposed, and the adjuster 106 attempts to come out, the adjuster 106 will not come out because it is covered by the locking member.

[0062] Thus, in the saddle-type vehicle 10 in the other embodiment, the swing arm 16 comprises a brake caliper 82 and a caliper bracket 80 that supports the brake caliper 82, the eccentric holder 54 comprises an extension portion 72 that extends along the axle 15a to the other side in the axle axis direction, the caliper bracket 80 has a bracket insertion hole 88 through which the extension portion 72 and the axle 15a are inserted, an annular groove 90 is recessed and formed on the outer circumferential surface of the other end of the extension portion 72, a locking member that holds the caliper bracket 80 on the extension portion 72 is fitted into the annular groove 90, and the locking member overlaps with at least a part of the adjuster housing portion 100 in an axial view of the axle 15a. With this configuration, by providing a caliper bracket 80 that is stationary relative to the swingarm on the opening side of the adjuster housing 100, the locking member that holds the caliper bracket 80 on the extension portion 72 can be used to cover the opening side of the adjuster housing 100, making it easier to protect the adjuster 106 from the outside, and also preventing the adjuster 106 from popping out of the adjuster housing 100.

[0063] Furthermore, in another embodiment, in the axial direction of the axle 15a, the length of the adjuster 106 is longer than the length from the other axial end of the adjuster housing 100 to the locking member. With this configuration, even if the adjustment bolt 94 is removed after tension adjustment, the adjuster 106 can be retained inside the eccentric holder 54 without needing to remove it. Furthermore, the adjuster 106 will not slip out from between the adjuster housing 100 and the locking member.

[0064] [Configurations supported by the above embodiment] The above embodiment supports the following configuration.

[0065] (Composition 1) A saddle-type vehicle comprising: a swing arm that rotatably supports a wheel via an axle; a substantially cylindrical holder support portion provided at the tip of the swing arm; an eccentric holder rotatably housed inside the holder support portion and having an axle hole for supporting the axle at an eccentric position with respect to the center of rotation; an adjuster for adjusting the rotational position of the eccentric holder relative to the holder support portion; an adjustment bolt that engages with the adjuster and moves the adjuster; a driven rotating member fixed to the wheel and rotating integrally with the wheel; and an endless member stretched across the driven rotating member and transmitting the rotational power of a prime mover to the driven rotating member, wherein the tension of the endless member is adjusted by rotating and fixing the eccentric holder to the holder support portion. A saddle-type vehicle characterized in that the holder support portion is provided with an insertion hole through which the adjustment bolt is inserted, the eccentric holder is provided with a bolt housing portion that houses the adjustment bolt inserted through the insertion hole, and an adjuster housing portion that extends parallel to the axle and communicates with the bolt housing portion, the adjuster is configured to be movable on the axis of the adjustment bolt, and the rotational position of the eccentric holder relative to the holder support portion is adjusted by the adjustmenter housing portion moving on the axis of the adjustment bolt, the driven rotating member is provided adjacent to the eccentric holder on one side of the eccentric holder in the axle axis direction, and the adjuster housing portion opens on the other side in the axle axis direction and is closed on one side in the axle axis direction. In the saddle-type vehicle of configuration 1, the adjuster housing is closed on the driven rotating member side, so it is possible to provide a saddle-type vehicle that can reduce disturbances to the adjuster used in adjusting the tension of the endless member while ensuring ease of assembly of the adjuster.

[0066] (Configuration 2) The saddle-type vehicle according to configuration 1, characterized in that the swing arm is provided with a brake caliper and a caliper bracket that supports the brake caliper, the caliper bracket is provided adjacent to the eccentric holder and on the other side of the eccentric holder in the axle axis direction, and in an axial view of the axle, the caliper bracket is arranged to overlap with at least a part of the adjuster housing. In the saddle-type vehicle of configuration 2, by providing a caliper bracket that is stationary relative to the swing arm on the opening side of the adjuster housing, the caliper bracket can be used to cover the opening of the adjuster housing, making it easier to protect the adjuster from the outside, and also preventing the adjuster from flying out of the adjuster housing.

[0067] (Composition 3) The saddle-type vehicle according to configuration 1 or 2, characterized in that the swing arm comprises a brake caliper and a caliper bracket that supports the brake caliper, the eccentric holder has an extension portion that extends along the axle to the other side in the axle direction, the caliper bracket has an insertion hole through which the extension portion and the axle are inserted, an annular groove is recessed and formed on the outer circumferential surface of the other end of the extension portion, a locking member that holds the caliper bracket on the extension portion is fitted into the annular groove, and the locking member overlaps with at least a part of the adjuster housing portion in an axial view of the axle. In the saddle-type vehicle of configuration 3, by providing a caliper bracket that is stationary relative to the swing arm on the opening side of the adjuster housing, the opening side of the adjuster housing can be covered using a locking member that holds the caliper bracket on the extension, making it easier to protect the adjuster from the outside and preventing the adjuster from flying out of the adjuster housing.

[0068] (Composition 4) The saddle-type vehicle according to configuration 3, characterized in that, in the axial direction of the axle, the length of the adjuster is longer than the length from the other axial end of the adjuster housing to the locking member. In the saddle-type vehicle of configuration 4, even if the adjustment bolt is removed after tension adjustment, the adjustment can be retained inside the eccentric holder without needing to remove it. Furthermore, the adjuster will not slip out from between the adjuster housing and the locking member.

[0069] (Composition 5) The saddle-type vehicle according to any one of configurations 1 to 4, characterized in that the insertion hole is formed on the upper surface of the swing arm, rearward from the axis center of the axle. With the saddle-type vehicle of configuration 5, the adjustment bolt can be easily positioned at the end of the saddle-type vehicle, making it easier for the operator to access the adjustment bolt.

[0070] (Composition 6) The saddle-type vehicle according to any one of configurations 1 to 5, characterized in that the swing arm is a cantilevered swing arm that supports the wheel from one side in the axle direction. According to the saddle-type vehicle of configuration 6, a cantilevered swing arm can be provided with an adjuster used to adjust the tension of the endless member while reducing disturbances. [Explanation of Symbols]

[0071] 10. Saddle-type vehicles 11. Body frame 12 Power Unit (Motor) 13 Front Wheel 13a axle 14 Front Fork 15 Rear wheel (wheel) 15a axle 16 Swingarm 17 seats 18 Headpipe 19 Front Frame 20 Rear frame 21 Handle 22 Pivot Axis 23 Crankcase 24 Cylinder section 25 Exhaust system 26 Front fender 27 Rear fender 28 steps 29 Fuel tank 30 Proximal end 32 Drive pulley 34 Support part 34a Support shaft 34b Covering 36 Rear Shock Absorber 38 Arm section 40 Brake hoses 42 Joint section 44 Joint section 46 Axle section 48 Axle nut 50 Axle Flange 52 Holder support part 54 Eccentric holder 56 Fasteners 58 Axle hole 60 Left bearing 62 splines 64. Driven pulley (driven rotating member) 64a Pulley belt (endless member) 66 Hub 67 Washer 68 Colors 69 Dust seal 70 Colors 72 Stretching section 74 Right bearing 76 Brake Discs 78 Pulsar Ring 80 Caliper Bracket 82 Brake caliper 84 Locked part 88 Bracket insertion hole (insertion hole) 90 Annular groove 92 Circlip (locking member) 94 Adjustment bolt 96 Through hole 98 Bolt housing 100 Adjuster housing 102 Bottom 104 Aperture 106 Adjuster P center axis Q center axis

Claims

1. A swing arm (16) that rotatably supports the wheel (15) via an axle (15a), A substantially cylindrical holder support portion (52) is provided at the tip of the swing arm (16), An eccentric holder (54) is rotatably housed inside the holder support portion (52) and has an axle hole (58) that supports the axle (15a) at an eccentric position with respect to the center of rotation, An adjuster (106) for adjusting the rotational position of the eccentric holder (54) relative to the holder support portion (52), An adjustment bolt (94) that engages with the adjustment element (106) and moves the adjustment element (106), A driven rotating member (64) is fixed to the wheel (15) and rotates integrally with the wheel (15), The system includes an endless member (64a) that is stretched over the driven rotating member (64) and transmits the rotational power of the prime mover (12) to the driven rotating member (64), In a saddle-type vehicle (10) in which the tension of the endless member (64a) is adjusted by rotating and fixing the eccentric holder (54) to the holder support portion (52), The holder support portion (52) is provided with an insertion hole (96) through which the adjustment bolt (94) is inserted. The eccentric holder (54) is provided with a bolt housing portion (98) that houses the adjustment bolt (94) inserted through the insertion hole (96), and an adjuster housing portion (100) that extends parallel to the axle (15a) and communicates with the bolt housing portion (98). The adjuster (106) is configured to be movable along the axis of the adjustment bolt (94), and the adjuster (106), housed in the bolt housing (98), moves along the axis of the adjustment bolt (94) to adjust the rotational position of the eccentric holder (54) relative to the holder support (52). On one side of the eccentric holder (54) in the axle axis direction, the driven rotating member (64) is provided adjacent to the eccentric holder (54). The adjuster housing (100) is open on the other side of the axle axis, and the one side of the axle axis is closed. A saddle-type vehicle characterized by its design.

2. The swing arm (16) is provided with a brake caliper (82) and a caliper bracket (80) that supports the brake caliper (82). The caliper bracket (80) is provided adjacent to the eccentric holder (54) and on the other side of the eccentric holder (54) in the axle axis direction. In an axial view of the axle (15a), the caliper bracket (80) is positioned so as to overlap with at least a portion of the adjuster housing (100). The saddle-type vehicle according to feature 1.

3. The swing arm (16) comprises a brake caliper (82) and a caliper bracket (80) that supports the brake caliper (82), The eccentric holder (52) is provided with an extension portion (72) that extends along the axle (15a) to the other side in the axle direction, The caliper bracket (80) has an insertion hole (88) through which the extension portion (72) and the axle (15a) are inserted. An annular groove (90) is formed as a recess on the outer circumferential surface of the other axial end of the extended portion (72). A locking member (92) that holds the caliper bracket (80) on the extension portion (72) is fitted into the annular groove (90). The locking member (92) overlaps with at least a portion of the adjuster housing (100) in an axial view of the axle (15a), The saddle-type vehicle according to feature 1.

4. In the axial direction of the axle (15a), the length of the adjuster (106) is longer than the length from the other axial end of the adjuster housing (100) to the locking member (92). The saddle-type vehicle according to feature 3.

5. The through hole (96) is formed on the upper surface of the swing arm (16) behind the axis center of the axle (15a). A saddle-type vehicle according to any one of claims 1 to 4.

6. The swing arm (16) is a cantilevered swing arm that supports the wheel (15) from one side in the axle direction. A saddle-type vehicle according to any one of claims 1 to 4.

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