JP2006069437A - Brake hose supporting structure for saddle riding type irregular ground traveling vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a brake hose from being swung to excess in steering and vibration of a vehicle. <P>SOLUTION: In the brake hose supporting structure for a saddle riding type irregular ground traveling vehicle 10, a disc brake device 110, comprising a brake disc 137 and a brake caliper 111 performing braking while clamping the brake disc 137, in which a brake liquid pressure is fed to the brake caliper 111 by the brake hose 112 is arranged at an inner side of a wheel 154 of a front wheel 17. It is made to an independent suspension in which left and right front wheels 17, 17 are supported by a front upper arm 40 and a front lower arm 41 respectively and a knuckle 88 is mounted to distal ends of the front upper arm 40 and the front lower arm 41 through ball joints 86, 87 respectively. A third bracket 225 as a hose supporting part for supporting the brake hose 112 is provided on a king pin axis 115 passing through respective centers of the ball joints 86, 87. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a brake hose support structure for a saddle-ride type rough terrain vehicle.

As a conventional brake hose support structure for a saddle-ride type rough terrain vehicle, one in which a brake hose is fixed to a suspension arm is known (for example, see Patent Document 1).
Japanese Patent Publication No. 7-102969

Patent Document 1 will be described below. In addition, about the code | symbol, what was described in the gazette was used.
In Patent Document 1, as shown in FIG. 3 of the same publication, an upper arm 23 and a lower arm 24 are attached to a vehicle body frame 1 so as to be able to swing up and down, and balls are attached to respective tips of the upper arm 23 and the lower arm 24. A knuckle bracket 25 is attached via a joint 26, the front wheel 11 is rotatably supported by the knuckle bracket 25, a caliper unit 32 is attached to the knuckle bracket 25, and the brake hose 33 is attached to the upper arm 23 by a clamper 23a. It is described that the tip of the brake hose 33 is connected to the caliper unit 32.

  In the technique of Patent Document 1, since the portion between the clamper 23a and the caliper unit 32 is relatively long, for example, when the front wheel 11 is steered and the above portion of the brake hose 33 is bent or moved, or the vehicle Therefore, it is necessary to consider so that the brake hose 33 does not swing excessively.

  An object of the present invention is to provide a brake hose support structure for a saddle-ride type rough terrain vehicle that prevents the brake hose from swinging excessively during turning or when the vehicle vibrates.

  According to a first aspect of the present invention, there is provided a disc brake device including a brake disc and a brake caliper that brakes the brake disc with the brake disc being supplied to the brake caliper by a brake hose. Brake for saddle riding type rough terrain vehicle, which is arranged and is independent suspension type that supports left and right wheels by upper arm and lower arm respectively, and knuckle is attached to the tip of these upper arm and lower arm via ball joints respectively The hose support structure is characterized in that a hose support portion for supporting the brake hose is provided on a kingpin shaft passing through the center of each of the ball joints.

  Conventionally, since the brake hose is fixed to the suspension arm and the caliper unit, the distance between the fixed portions is relatively long, so that the brake hose may swing excessively during turning or when the vehicle vibrates. However, in the present invention, because the hose support portion is provided on the kingpin shaft, the brake hose is bent around the hose support portion, and can swing only at a short distance between the hose support portion and the brake caliper. The amount and range of movement of the brake hose can be reduced.

The invention according to claim 2 is characterized in that the brake hose is supported by the upper arm.
The lower arm serves as a guard member that covers the lower side of the brake hose, and can protect the brake hose from flying stones, road surface protrusions, and the like.

The invention according to claim 3 is characterized in that the upper arm is composed of a pair of front and rear front arms and a rear arm, and the brake hose is arranged along the rear arm.
The front arm of the upper arm serves as a guard member that covers the front of the brake hose, and can protect the brake hose from flying stones and the like.

The invention according to claim 4 is characterized in that one end of the cushion unit for reducing the impact transmitted from the wheel to the vehicle body side is attached to the vehicle body side, and the other end is attached to the upper arm.
By attaching the lower end of the cushion unit to the upper arm, the lower end of the cushion unit and the brake hose are supported by the same upper arm, so the brake hose and the cushion unit will interfere even if the suspension swings. There is no. Further, by attaching the cushion unit to a highly rigid position where the front arm and the rear arm constituting the upper arm intersect, the load of the cushion unit can be reliably received.

  In the invention according to claim 1, since the hose support portion is provided on the kingpin shaft, the brake hose can be bent around the hose support portion, and at a short distance between the hose support portion and the brake caliper. Since it can be prevented from swinging only, the amount and range of movement of the brake hose can be reduced, and the brake hose can be prevented from swinging excessively. Therefore, the space around the brake hose can be reduced, and the vehicle can be made compact and downsized.

  In the invention according to claim 2, since the brake hose is supported by the upper arm, the lower arm serves as a guard member that covers the lower part of the brake hose, and the brake hose can be protected from a stepping stone or a protrusion on the road surface.

  In the invention according to claim 3, since the upper arm is composed of a pair of front and rear front arms and rear arms, and the brake hose is arranged along the rear arm, the front arm of the upper arm serves as a guard member that covers the front of the brake hose. The brake hose can be protected from stepping stones and the like, which is even better.

  In the invention according to claim 4, since one end of the cushion unit for reducing the impact transmitted from the wheel to the vehicle body side is attached to the vehicle body side and the other end is attached to the upper arm, the lower end of the cushion unit and the brake hose are the same upper arm. Therefore, even if the suspension swings, the brake hose and the cushion unit do not interfere with each other. Further, by attaching the cushion unit to a highly rigid position where the front arm and the rear arm constituting the upper arm intersect, the load of the cushion unit can be reliably received.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a side view of a saddle-ride type rough terrain vehicle according to the present invention. A saddle-ride type rough terrain vehicle 10 (hereinafter simply referred to as “rough terrain vehicle 10”) includes a body frame 11, An engine 12 mounted at the center lower part of the body frame 11, a power transmission device 13 connected to the engine 12 and attached to the body frame 11, left and right front wheels 17, 17 (only the reference numeral 17 on the front side is shown) and left and right. Four wheels including a front suspension 15 and a rear suspension 16 for suspending rear wheels 18 and 18 (only reference numeral 18 on the front side), and a steering device 21 connected to the front wheels 17 and 17 and attached to the vehicle body frame 11. It is a driving vehicle.

  The vehicle body frame 11 includes a main frame 25, a front frame 26 and a rear frame 27 attached to the front and rear of the main frame 25, a bracket 31 attached between the left and right of the lower portion of the front frame 26, and a left and right portion of the upper portion of the front frame 26. And a cross member 32 attached thereto. 33 is a seat seat attached to the main frame 25, 34 is a fuel tank, 35 is a front guard attached to the front frame 26, 36 is a front carrier attached to the front frame 26, and 37 is attached to the rear portion of the main frame 25. Indicates the rear carrier.

The front suspension 15 is a left and right independent suspension, and a pair of left and right front upper arms 40 and 40 (only front side reference 40 is shown) and front lower arms 41 and 41 (front side reference numbers) attached to the vehicle body frame 11 so as to be vertically swingable. 41), and a pair of left and right front cushion units 42, 42 (only the reference numeral 42 on the near side is shown) attached between the front upper arm 40 and the cross member 32.
The rear suspension 16 includes a rear cushion unit 44 attached to the vehicle body frame 11.

  The power transmission device 13 is connected to the transmission 47 connected to the output shaft of the engine 12, the gear change pedal 48, the front drive shaft 51 and the rear drive shaft 52 connected to the front and rear of the transmission 47, and the front drive shaft 51. And a front final reduction gear 53 attached to the vehicle body frame 11 and a rear final reduction gear 54 connected to the rear drive shaft 52.

  The steering device 21 has a steering shaft 56 attached to the front upper portion of the main frame 25 with a shaft holder 55 and a handle 57 attached to the steering shaft 56. In addition, 61 is a front fender that covers the front wheels 17 and 17 and 62 is a rear fender that covers the rear wheels 18 and 18.

  The engine 12 is a four-cycle engine, and includes a cylinder block 63, a cylinder head 64 attached to an upper portion of the cylinder block 63, an exhaust device 65 connected to a front portion of the cylinder head 64, and a rear portion of the cylinder head 64. An attached carburetor 66; a valve mechanism 67 provided in the cylinder head 64; a piston 71 movably inserted into the cylinder block 63; a crankshaft 72 connected to the piston 71 via a connecting rod 71a; An oil pan 73 disposed below the block 63 and a cooling fan 74 disposed in front of the engine 12 and forcibly air-cooling the engine 12 are provided.

FIG. 2 is a front view of the main part of the front suspension of the rough terrain vehicle according to the present invention. Here, only the part for suspending the left front wheel 17 of the front suspension 15 is shown, and the description of the part for suspending the right front wheel 17 of the front suspension 15 is omitted.
The front suspension 15 includes three arm support portions 81, 82, and 82 (left and right arm support portions 82 not shown) disposed on the left and right of the front portion of the body frame 11 and an arm. The above-described front upper arm 40 attached to the end portions of the support portions 81, 81 so as to be swingable up and down, the above-described front lower arm 41 attached to the end portions of the arm support portions 82, 82 so as to be swingable up and down, and these front upper arms 40. And a knuckle 88 connected to the tip of each of the front lower arms 41 via ball joints 86, 87, a hub (not shown) rotatably attached to the knuckle 88, and the vehicle body frame 11 and the front upper arm 40. Front cushion unit 42 (see FIG. 1), and the front wheel 17 is attached to this hub. That. Reference numeral 43 denotes a cushion support bracket attached to the upper surface of the front end portion 40a of the front upper arm 40 in order to support the lower end of the front cushion unit 42.

  The knuckle 88 includes a first arm 125 and a second arm 126, and the brake caliper 111 of the disc brake device 110 is attached to the first arm 125 and the second arm 126.

  The disc brake device 110 includes a brake disc 137 attached to a hub and the above-described brake caliper 111 that sandwiches and brakes the brake disc 137. The disc brake device 110 completely fits in a wheel 154 that constitutes the front wheel 17. Of the type.

  Here, the front final reduction gear 53 is connected to the front end of a front drive shaft 51 (see FIG. 1) extending forward from the lower portion of the transmission 47 (see FIG. 1). Power is transmitted to the hub via the shaft 93 to drive the front wheels 17.

  Reference numerals 95 and 96 denote rubber boots covering the constant velocity joints 97 and 98 provided at both ends of the drive shaft 93. The rubber boot 95 and the shaft 99 passed between the constant velocity joints 97 and 98 are respectively forward and diagonally downward. Is covered with the inboard side guard member 102 attached to the front lower arm 41, and the front of the other rubber boot 96 is covered with the outboard side guard member 105 attached to the knuckle 88.

  Reference numeral 112 in the figure denotes a brake hose that is provided to a master cylinder (not shown) provided on the handle 57 (see FIG. 1) side and the brake caliper 111. The brake hose 112 is connected to the front upper arm 40 and the vehicle body frame 11 in the middle. In particular, fix one of the fixing portions of the brake hose 112 (specifically, a third bracket 225 described later) above the front end portion 40a of the front upper arm 40 and to each of the ball joints 86 and 87. It was arranged on a kingpin shaft 115 connecting the centers of the two.

  FIG. 3 is a view taken in the direction of arrow 3 in FIG. 2 (the arrow (FRONT in the figure represents the front of the vehicle; the same applies hereinafter)). It shows that the brake caliper 111 is attached with bolts 117 and 118 to the first caliper support portion 125a provided at the tip portion of the first arm portion 125 and the second caliper support portion 126a provided at the tip portion of the second arm portion 126. .

  The brake caliper 111 includes a caliper bracket 131 (the outline is indicated by a thick line) attached to the first arm 125 and the second arm 126, and the first connecting portion 132 and the second connecting portion 133 attached to the caliper bracket 131. The caliper assembly 134 is connected to each other.

  Here, 131A is a first attachment portion provided on the caliper bracket 131 for attachment to the first caliper support portion 125a of the first arm 125, and 131B is a caliper bracket for attachment to the second caliper support portion 126a of the second arm 126. 131 is a second mounting portion provided in 131.

  The caliper assembly 134 includes a caliper body 136 connected to the caliper bracket 131, and a pair of pads 138 and 141 (only a reference numeral 138 on the front side is shown) that is disposed inside the caliper body 136 and sandwiches the brake disc 137 from both sides. The piston 142 is movably accommodated in the caliper body 136 to press the pads 138 and 141.

  The center of the front wheel 17 (see FIG. 1) is represented by a point 190, the center of the piston 142 is represented by a point 191, the axis of the bolt 117 is represented by a point 192, the axis of the bolt 118 is represented by a point 193, and the distance from the point 190 to the point 191 is represented by L1, When the distance from the point 190 to the point 192 (or the point 193) is L2, the distance L2 is larger than the distance L1 (L2> L1). That is, the bolts 117 and 118 for attaching the brake caliper 111 to the knuckle 88 are arranged on the outer side in the radial direction from the center of the piston 142. As a result, the load generated on the bolts 117 and 118 when the brake torque is applied to the pads 138 and 141 (specifically, the position corresponding to the center position of the piston 142 of the pads 138 and 141) during braking is further reduced. be able to.

  4 is a cross-sectional view taken along line 4-4 of FIG. 3. A hub 146 is rotatably attached to the knuckle 88 via a bearing 145, and is integrated with a constant velocity joint 98 (see FIG. 2) inside the hub 146. The provided axle 147 is splined and attached with a nut 148, a brake disk 137 is attached to the hub 146 with a plurality of bolts 151, and a cover member 152 is attached to the knuckle 88 to cover the brake disk 137 from the inside. Indicates that it was installed. Reference numeral 154 denotes a wheel attached to the hub 146 with a plurality of bolts 155 and a plurality of wheel nuts 156, 154a denotes a rim of the wheel 154, 157 denotes a retaining ring, and 158 and 159 denote dust seals.

  The cover member 152 includes a disk part 152a extending radially outward and a flange part 152b provided at a part of the outer peripheral edge of the disk part 152a. Returning to FIG. 3, the flange part 152b is connected to the disk part 152a. It is a member provided in a portion other than the lower outer peripheral edge, that is, the upper outer peripheral edge and the rear outer peripheral edge (specifically, the range of the angle θ) of the disk portion 152a.

  FIG. 5 is a cross-sectional view (partially showing a front view) of the brake caliper of the rough terrain vehicle according to the present invention, and a first connecting portion 132 and a second connecting portion for connecting the caliper assembly 134 to the caliper bracket 131. Part 133 is shown.

  The first connecting portion 132 includes a sleeve 162 having annular grooves 162a and 162a at both ends, a rubber bush 163 fitted in the annular grooves 162a and 162a of the sleeve 162, and the sleeve 162 and the bush 163, respectively. Grease 164 that lubricates between the sleeve 162 and the bush 163 by filling between the sleeve 162 and the connecting bolt 166 passed through the sleeve 162. The connecting bolt 166 is screwed to the caliper bracket 131, and the boot 163. The compacted cylindrical portion 163a was fitted into an arm portion 136a (specifically, a fitting hole 136b opened in the arm portion 136a) provided in the caliper body 136.

  The second connecting portion 133 has a gap between the sleeve 171 press-fitted into the caliper bracket 131, a sliding pin 172 slidably inserted into a sliding hole 171a formed in the sleeve 171, and the sleeve 171 and the sliding pin 172. A rubber boot 173 for closing and a mounting bolt 174 attached to an arm portion 136c (specifically, a fitting hole 136d formed in the arm portion 136c) provided with a sliding pin 172 in the caliper body 136 are included. Reference numeral 172a denotes a screw formed on the sliding pin 172 to be screwed to the mounting bolt 174.

  That is, the brake caliper 111 is a caliper floating type in which the caliper assembly 134 is floated with respect to the caliper bracket 131. In the first connecting portion 132, the caliper bracket 131 side and the caliper body 136 side are rubber contacts, In the second connecting portion 133, the caliper bracket 131 side and the caliper body 136 side are in metal contact, and the caliper assembly 134 against the caliper bracket 131 is caused by the reaction force of the pressing force of the piston 142 (see FIG. 3). Move in the direction or to the right.

  Thus, when the brake disk 137 falls, the caliper assembly 134 is moved to the brake disk on the first connecting part 132 side while guiding the movement of the caliper assembly 134 with respect to the caliper bracket 131 on the second connecting part 133 side. 137 can be caused to follow, and the pads 138 and 141 can always be brought into close contact with the brake disc 137 to improve the brake performance.

6 (a) and 6 (b) are explanatory views illustrating the brake caliper of the rough terrain vehicle according to the present invention.
(A) is the figure which looked at the brake caliper 111 shown in FIG. 3 from the back side. In the 1st connection part 132 and the 2nd connection part 133 which connect the caliper assembly 134 to the caliper bracket 131, the 1st connection part 132 is The brake disc 137 that rotates in the forward rotation direction (that is, the rotation direction when the vehicle moves forward) enters the caliper assembly 134 (the so-called “turn-in side”). The second connecting portion 133 is located on the side where the brake disk 137 rotating in the forward rotation direction exits from the caliper assembly 134 (the so-called “turning side”).

  Further, the caliper bracket 131 is a member provided with convex portions 131C and 131D that are adjacent to the first mounting portion 131A and the second mounting portion 131B and project substantially outward in the radial direction. The distance from the center of the front wheel 17 (see FIG. 2) to the outer surface 136e of the caliper body 136 (the outline is indicated by a thick line) (specifically, the portion that protrudes most outward in the radial direction of the outer surface 136e). If the distance from the center of the front wheel 17 to the tip of the convex portion 131C (or the convex portion 131D) (that is, the radius) is R2, the distance R2 is greater than the distance R1. (R2> R1), and the difference P between the distance R2 and the distance R1 is the amount of protrusion of the convex portions 131C and 131D from the outer surface 136e.

  The caliper body 136 includes a hose connection hole 177 (a portion where a female screw is formed) for connecting the brake hose 112 (see FIG. 2) on the side surface. Reference numeral 178 denotes an air vent hole for extracting air from a cylinder provided in the caliper body 136, 181 denotes a base provided at the opening of the air vent hole 178, and 182 denotes a cap that covers the base 181.

  FIG. 6B is a cross-sectional view of the brake caliper 111 cut along the plane of the drawing. Projections 138 a and 138 b projecting in the longitudinal direction (substantially the rotation direction of the brake disc 137) are integrally provided on the pad 138. It is shown that a pad arrangement opening 131a for arranging the pad 138 is formed, and engagement notches 131b and 131c for engaging the protrusions 138a and 138b are provided in the opening 131a.

  These protrusions 138a and 138b and the engagement notches 131b and 131c are torque receiving portions that receive brake torque when braking is performed with the rotating brake disc 137 sandwiched between the pads 138 and 141 (see FIG. 5). Since the arrow in the figure is the forward rotation direction of the brake disk 137, the protrusion 138b and the engagement notch 131c are the torque receiving part in the forward rotation direction, and the protrusion 138a and the engagement notch 131b are the torque receiving part in the reverse rotation direction. It is. Reference numeral 184 denotes a leaf spring interposed between the opening 131a and the pad 138 in order to eliminate rattling of the pad 138 when the pad 138 is disposed in the opening 131a.

  FIG. 7 is a plan view showing a brake hose support structure for a rough terrain vehicle according to the present invention. The brake hose 112 is supported along the front upper arm 40 from the body frame 11 side, and the tip of the brake hose 112 is connected to the brake caliper. 111 is connected.

  Specifically, the first bracket 221 is attached to the vehicle body frame 11, the second bracket 224 and the third bracket 225 are attached to the rear arm 222 constituting the front upper arm 40, and the first bracket 221, the second bracket 224, and the third bracket are attached. The brake hose 112 is fixed by the bracket 225, and the brake hose fixing portion 225a of the third bracket 225 is disposed above the distal end portion 40a of the rear arm 222, that is, on the extended line of the kingpin shaft 115 (see FIG. 2). . In addition, the brake hose 112 is passed behind the cushion support bracket 43, specifically, the back of the tip end portion 40a. Reference numeral 227 denotes a bolt for attaching the third bracket 225 to the tip end portion 40a. Reference numeral 228 denotes a hose presser attached to the tip end portion 40a in order to suppress the vibration of the brake hose 112 between the second bracket 224 and the third bracket 225. is there.

  The front upper arm 40 includes a vehicle body attachment portion 233 that is rotatably attached to the arm support portion 81 with bolts 231 and nuts 232, the rear arm 222 that extends from the vehicle body attachment portion 233 toward the vehicle side, and the vehicle body attachment portion 233. And a front arm 235 attached to the tip 40a of the rear arm 222. A bolt 45 connects the front cushion unit 42 to the cushion support bracket 43.

  As described above, even when the cushion support bracket 43 is attached to the upper surface of the distal end portion 40a of the upper arm 40 (that is, the rigid portion where the front arm 235 and the rear arm 222 are coupled), FIG. 7, the cushion support bracket 43 and the third bracket 225 are separated from each other, so that interference between the cushion support bracket 43 and the brake hose 112 can be prevented.

Next, the operation of the brake hose 112 described above will be described.
FIGS. 8A and 8B are operation diagrams showing the operation of the brake hose of the rough terrain vehicle according to the present invention.
(A) shows the brake hose 112 in the state where it is not steered, that is, in the state where the front wheels are directed straight ahead. The tip end portion 112A of the brake hose 112 from the third bracket 225 is a tip portion 112A, and the tip portion 112A is hatched so that its shape can be easily grasped.

  In (b), at the time of turning, the knuckle 88 and the brake caliper 111 move in the direction of the arrow about the kingpin shaft 115 (see FIG. 2), and the tip 112A of the brake hose 112 is centered on the third bracket 225. (The imaginary line is the tip portion 112A before the movement shown in (a)). As described above, the distal end portion 112A has a small amount of movement, particularly at an intermediate position of the distal end portion 112A, and the entire moving range of the distal end portion 112A is also small.

FIGS. 9A and 9B are operation diagrams showing the operation of the comparative example of the brake hose support method. The same components as those in the embodiment shown in FIG.
(A) shows the state which attached the 3rd bracket 325 to the vehicle body center side (namely, upper side of a figure) of the front-end | tip part 40a of the front upper arm 40. FIG. Here, the front end side of the brake hose 112 is used as a front end portion 112B, and hatching is performed.

  In (b), at the time of turning, as the knuckle 88 and the brake caliper 111 rotate in the direction of the arrow around the kingpin shaft 115 (see FIG. 2), the movement of the tip 112B of the brake hose 112 is performed. The amount of movement, particularly the amount of movement at the intermediate position of the tip 112B, is large and moves in a large range (the imaginary line is the tip 112B before movement shown in (a)), so it interferes with surrounding components. It is necessary to pay attention to the arrangement of the brake hose 112 so that it does not occur.

  As described above with reference to FIGS. 2 and 7, the present invention first includes the brake disc 137 and the brake caliper 111 that brakes the brake disc 137 on the inner side of the wheel 154 of the front wheel 17 as a wheel. In addition, a disc brake device 110 to which brake hydraulic pressure is supplied by a brake hose 112 is disposed on the brake caliper 111, and the left and right front wheels 17, 17 are respectively a front upper arm 40 as an upper arm and a front lower arm 41 as a lower arm. In the brake hose support structure of the saddle riding type rough terrain vehicle 10 in which the knuckle 88 is attached to the front ends of the front upper arm 40 and the front lower arm 41 via ball joints 86 and 87, respectively. 86, On kingpin axis 115 that passes through the centers of the 7, characterized in that a third bracket 225 as a hose supporting part which supports the brake hose 112.

  Since the third bracket 225 is provided on the kingpin shaft 115, the brake hose 112 can be bent with the third bracket 225 as the center, and can swing only at a short distance between the third bracket 225 and the brake caliper 111. Therefore, the amount and range of movement of the brake hose 112 can be reduced, and the brake hose 112 can be prevented from swinging excessively. Therefore, the space around the brake hose 112 can be reduced, and the saddle riding type rough terrain vehicle 10 can be made compact and small.

Secondly, the present invention is characterized in that the brake hose 112 is supported by the front upper arm 40.
Since the brake hose 112 is supported by the front upper arm 40, the front lower arm 41 serves as a guard member that covers the lower part of the brake hose 112, and the brake hose 112 can be protected from a stepping stone or a protrusion on the road surface.

  Thirdly, the present invention is characterized in that the front upper arm 40 includes a pair of front and rear front arms 235 and a rear arm 222, and the brake hose 112 is disposed along the rear arm 222.

  Since the brake hose 112 is disposed along the rear arm 222, the front arm 235 of the front upper arm 40 becomes a guard member that covers the front of the brake hose 112, and the brake hose 112 can be protected from stepping stones and the like. .

  Fourthly, the present invention is characterized in that one end of a front cushion unit 42 as a cushion unit for reducing an impact transmitted from the wheel 17 to the vehicle body side is attached to the vehicle body side, and the other end is attached to the upper arm 40.

  By attaching the lower end of the front cushion unit 42 to the front upper arm 40, the lower end of the front cushion unit 42 and the brake hose 112 are supported by the same front upper arm 40. Therefore, even if the suspension swings, the brake hose 112 And the front cushion unit 42 do not interfere with each other. Further, by attaching the front cushion unit 42 to a highly rigid position where the front arm 235 and the rear arm 222 constituting the front upper arm 40 intersect, the load of the front cushion unit 42 can be reliably received.

  The brake hose support structure of the present invention is suitable for a vehicle that steers wheels around a kingpin axis.

It is a side view of the saddle-ride type rough terrain vehicle of the present invention. It is a principal part front view of the front suspension of the rough terrain vehicle which concerns on this invention. FIG. 3 is a view taken in the direction of arrow 3 in FIG. 2. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. It is sectional drawing which shows the brake caliper of the rough terrain vehicle which concerns on this invention. It is explanatory drawing explaining the brake caliper of the rough terrain vehicle which concerns on this invention. It is a top view which shows the brake hose support structure of the rough terrain vehicle which concerns on this invention. It is an operation | movement figure which shows the effect | action of the brake hose of the rough terrain vehicle which concerns on this invention. It is an operation | movement figure which shows the effect | action of the comparative example of the support method of a brake hose.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Riding-type rough terrain vehicle, 17 ... Wheel (front wheel), 40 ... Upper arm (front upper arm), 41 ... Lower arm (front lower arm), 86, 87 ... Ball joint, 110 ... Disc brake device, 111 ... Brake caliper, 112 ... brake hose, 115 ... kingpin shaft, 137 ... brake disc, 154 ... wheel, 222 ... rear arm, 225 ... hose support (third bracket), 235 ... front arm.

Claims (4)

Inside the wheel of the wheel is a disc brake device that consists of a brake disc and a brake caliper that brakes with this brake disc sandwiched and brake fluid pressure is supplied to the brake caliper by a brake hose, In the brake hose support structure of a saddle-ride type rough terrain vehicle, which is an independent suspension type supported by the upper arm and the lower arm, and a knuckle is attached to the tip of each of the upper arm and the lower arm via a ball joint,
A brake hose support structure for a saddle-ride type rough terrain vehicle, wherein a hose support portion for supporting the brake hose is provided on a kingpin shaft passing through the center of each of the ball joints.   The brake hose support structure for a saddle-ride type rough terrain vehicle according to claim 1, wherein the brake hose is supported by the upper arm.   The brake hose for a saddle-ride type rough terrain vehicle according to claim 2, wherein the upper arm includes a pair of front and rear front arms and a rear arm, and the brake hose is disposed along the rear arm. Support structure.   4. A brake hose for a saddle-ride type rough terrain vehicle according to claim 3, wherein one end of a cushion unit for mitigating an impact transmitted from the wheel to the vehicle body side is attached to the vehicle body side, and the other end is attached to the upper arm. Support structure.

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