JP2012214062A - Layout of vehicle rear brake hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a layout of vehicle rear brake hose capable of preventing interference between a brake hose and a suspension component and, at the same time, improving the flexibility of the layout of the brake hose.SOLUTION: Both ends of the rear brake hose 3 are respectively fixed to a car body side bracket 2 which is fixed to the upper side of a lateral rod 9 of a car body and an axle side bracket 23 which is fixed to a rear axle 7, and the rear brake hose 3 is caused to pass through the rear side of the lateral rod 9 from the car body side bracket 2 and is routed to the axle side bracket 23, as the layout of the rear brake hose 3 which connects a stationary side brake pipe 57 fixed to the car body with a movable side brake pipe 58 fixed to the rear axle 7, in a vehicle in which right and left rear wheels 4L, 4R are suspended on the car body by shock absorbers 11 and the rear axle 7 of the rear wheels 4L, 4R and the car body are connected by the lateral rod 9 arranged in the car width direction.

Description

  The present invention relates to a layout of a vehicular rear brake hose that connects a fixed brake pipe fixed to a vehicle body and a movable brake pipe fixed to a rear axle.

  When the driver of the vehicle depresses the brake pedal, brake fluid pressure is generated in the master cylinder, and this brake fluid pressure is applied to the left and right front wheels and rear wheels via brake piping. This is supplied to the cylinder, whereby each brake device is operated, and braking is applied to the rotation of the front wheels and the rear wheels.

  By the way, in a vehicle in which the left and right rear wheels are suspended from the vehicle body by a shock absorber, the brake device provided on the rear wheel moves up and down together with the rear wheels, so that a metal brake pipe (brake pipe) extending from the master cylinder. Cannot be directly connected to the rear wheel brake device. For this reason, the fixed brake pipe fixed to the vehicle body and the movable brake pipe fixed to the rear axle that moves up and down together with the rear wheel are connected by a flexible rear brake hose, and the rear wheel hose moves up and down. The brake fluid pressure is allowed to be supplied to the brake device for the rear wheel (see, for example, Patent Documents 1 to 3).

JP-A-11-180296 JP-A-9-263236 Japanese Patent Publication No. 64-002542

  By the way, since the rear brake hose is conventionally arranged on the front side of the rear axle, the rear brake hose which bends and deforms following the movement of the rear wheel may interfere with suspension parts such as a lateral rod. There is a problem in that the layout of the rear brake hose is restricted, such as securing a large space for routing and securing a distance from the suspension parts.

  The present invention has been made in view of the above problems, and the object of the present invention is to increase the degree of freedom in the layout of the brake hose while preventing the interference between the brake hose and the suspension parts, and to make the brake hose fly from the front. It is an object of the present invention to provide a vehicle rear brake hose layout that can be protected from the above.

  In order to achieve the above object, the invention according to claim 1 is a vehicle in which left and right rear wheels are suspended from a vehicle body by a shock absorber, and a rear axle of the rear wheel and the vehicle body are connected by a lateral rod arranged in the vehicle width direction. As a layout of the rear brake hose connecting the fixed brake pipe fixed to the vehicle body and the movable brake pipe fixed to the rear axle, the vehicle body side bracket fixed above the lateral rod of the vehicle body and the rear axle Both ends of the rear brake hose are fixed to a fixed axle side bracket, and the rear brake hose is routed from the vehicle body side bracket to the axle side bracket through the rear of the lateral rod. To do.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the vehicle body side bracket is fixed to a lower surface of a lateral rod bracket which supports one end of the lateral rod so as to be swingable to the vehicle body.

  According to a third aspect of the present invention, in the second aspect of the present invention, the brake hose is directed obliquely downward toward the rear of the vehicle by the vehicle body side bracket and outward of the axle side bracket in the vehicle width direction. Features.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the axle side bracket is attached to a shock absorber bracket in which one end of the shock absorber is attached to the rear axle.

  According to the first aspect of the present invention, since the rear brake hose is passed behind the lateral rod, which is the part of the suspension that is disposed most rearward of the vehicle, the interference between the rear brake hose and the suspension part is reliably prevented. It is. Further, since the rear brake hose is arranged at a place where there are few arrangement parts and a relatively wide space is secured, the degree of freedom in layout of the rear brake hose can be increased. Furthermore, since suspension parts such as a lateral rod are disposed in front of the rear brake hose, the rear brake hose can be protected from flying objects such as pebbles from the front as the vehicle travels.

  According to the second aspect of the invention, the vehicle body side bracket for fixing one end (vehicle body side end portion) of the rear brake hose is attached to a place where the movement of the lateral rod is small (a place near the swinging center of the lateral rod). Interference between the rear brake hose and the lateral rod can be prevented more reliably.

  According to the invention described in claim 3, since the brake hose is directed obliquely downward toward the rear of the vehicle by the vehicle body side bracket and outward of the axle side bracket in the vehicle width direction, the rear brake hose is attached to the lateral rod. It can be laid out so as to approach a place where there is little movement (a place near the swing center of the lateral rod), and interference between the rear brake hose and the lateral rod can be surely prevented. Further, the rear brake hose is easily bent and deformed when the rear wheel moves upward (the rear suspension is compressed), and the posture of the rear brake hose is stabilized. Furthermore, since the vehicle body side bracket is fixed to the lower surface of the lateral rod bracket, the rear brake hose can be oriented in the above-mentioned direction along the lower surface of the lateral rod bracket, and the shape of the vehicle body side bracket is simplified and manufactured. In addition, the rear brake hose can be disposed close to the lateral rod bracket to reliably prevent interference between the rear brake hose and the lateral rod.

  According to the fourth aspect of the present invention, since the axle side bracket is attached to the shock absorber bracket, the axle side bracket can be arranged on the vehicle rear side, and one end of the rear brake hose is fixed to the axle side bracket. And the suspension parts can be reliably prevented.

It is a fragmentary perspective view which shows the structure of the brake piping system of a vehicle. It is a fragmentary perspective view which shows the structure of the brake piping system of a vehicle. 1 is a plan view of a rear suspension portion of a vehicle showing a layout of a rear brake hose according to the present invention. It is a rear view of the rear suspension part of the vehicle which shows the layout of the rear brake hose according to the present invention. It is the sectional view on the AA line of FIG. It is a fragmentary perspective view which shows the attachment structure of a vehicle body side bracket. It is a fragmentary perspective view which shows the attachment structure of an axle side bracket.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 and 2 are partial perspective views showing the configuration of a brake piping system of a vehicle. In FIG. 1, reference numeral 50 denotes a brake for boosting a driver's pedaling force applied to a brake pedal (not shown) using negative pressure. A brake arm of a brake device (not shown) is connected to a rod 50a that is a booster and projects to the center of the brake booster 50. When the driver depresses the brake pedal provided at the lower end of the brake arm, the rod 50a is pushed and brake fluid pressure is generated in the master cylinder 51, but the driver's pedaling force is the difference between atmospheric pressure and negative pressure. Since the force generated by using the pressure is boosted by the brake booster 50 that operates using the drive source, the physical burden of the driver's brake operation is reduced.

  By the way, the vehicle according to the present embodiment includes an ABS (anti-lock brake system) and a hill hold device, and the ABS actuator 30 that constitutes the ABS, the hill hold valve 31 that constitutes the hill hold device, and the brake hydraulic pressure. The hydraulic pressure sensor 32 to be detected is attached to the ABS actuator mounting bracket 1.

  Thus, the two brake pipes 52 extending from the master cylinder 51 are connected to the hill hold valve 31, and one of the two brake pipes 53, 54 extending from the hill hold valve 31. 53 is connected to the ABS actuator 30, and the other brake pipe 54 is connected to the ABS actuator 30 via the hydraulic pressure sensor 32. Further, two brake pipes 55 extending from the upper part of the ABS actuator 30 are connected to wheel cylinders of a brake device (not shown) provided on the left and right front wheels (not shown), respectively, and one brake pipe 55 extending from the upper part of the ABS actuator 30 is provided. The brake pipe 56 is connected to a joint 60 attached to the ABS actuator mounting bracket 1, and a brake pipe 57 extending from the joint 60 extends toward the rear of the vehicle.

  As shown in FIG. 2, the brake pipe (fixed-side brake pipe) 57 extends from the right side of the vehicle toward the rear of the vehicle. The brake pipe 57 is substantially perpendicular to the left side at the rear of the vehicle. The end portion is connected to one end of a rear brake hose 3 fixed to a vehicle body side bracket 2 described later. Here, the rear brake hose 3 is a bendable hose, and the other end is fixed to the axle side bracket 23, and the rear brake hose 3 is a brake device provided on the left rear wheel 4L (see FIGS. 3 and 4). The brake pipe (movable brake pipe) 58 connected to the wheel cylinder 5L is connected.

  A brake pipe (movable brake pipe) 59 extends in the vehicle width direction from the wheel cylinder 5L of the brake device provided on the left rear wheel 4L toward the right side, and an end thereof is the right rear wheel 4R. Is connected to a wheel cylinder 5R of a brake device provided in the vehicle.

  Next, the layout of the rear brake hose 3 according to the present invention will be described below with reference to FIGS.

  3 is a plan view of the rear suspension portion of the vehicle showing the layout of the rear brake hose according to the present invention, FIG. 4 is a rear view of the rear suspension portion of the vehicle, and FIG. 5 is a sectional view taken along line AA in FIG. 6 is a partial perspective view showing the mounting structure of the vehicle body side bracket, and FIG. 7 is a partial perspective view showing the mounting structure of the axle side bracket.

  As shown in FIGS. 3 to 5, the left and right rear wheels 4 </ b> L and 4 </ b> R are suspended by a rear suspension 6 so as to be vertically movable at the rear of the vehicle body. Here, the rear suspension 6 is of a trailing arm type, and the rear axle 7 arranged in the vehicle width direction (left-right direction in FIGS. 3 and 4) is arranged in the vehicle front-rear direction (perpendicular to the plane of FIG. 4). The rear axle 7 is supported on the rear part of the vehicle body by a pair of left and right coil springs 10 and a shock absorber 11. Yes.

  The left and right drive shafts 12 are inserted on both left and right end portions of the rear axle 7, and axle pipes 13 are rotatably supported. The left and right rear wheels 4L, 4R is attached. Specifically, as shown in FIG. 5, the axle pipe 13 is disposed at a position on the front upper side of the left and right ends of the rear axle 7.

  Further, side frames 14 extending in parallel with the vehicle front-rear direction are arranged on the left and right sides of the vehicle body, and a cross member 15 extending in the vehicle width direction is horizontally placed between the rear portions of these side frames 14. A lateral rod brace 16 hangs down from the lower rear end of the left side frame 14. The lower end of the lateral rod brace 16 and the intermediate portion of the cross member 15 are connected by a lateral rod bracket 17 arranged obliquely. Has been. The lateral rod brace 16 and the lateral rod bracket 17 are arranged on the rear side of the vehicle with respect to the rear axle 7 and the shock absorber 11 in the longitudinal direction of the vehicle.

  The lateral rod 9 arranged in the vehicle width direction is a long part for receiving the lateral force generated at the tire contact point of the rear wheels 4L and 4R when the vehicle is turning and positioning the tire in the lateral direction. One end (left end) of the lateral rod brace 16 is connected to a connecting portion with the lateral rod bracket 17 at the lower end of the lateral rod brace 16 through a rubber bush so as to be swingable by an axis disposed along the front-rear direction of the vehicle. The other end (right end) is connected to the rear side of the axle pipe 13 of the rear wheel 4R through a rubber bush so as to be swingable by a shaft disposed substantially along the front-rear direction of the vehicle.

  As shown in FIG. 5, the left and right coil springs 10 as suspension parts are arranged near the center of rotation of the rear wheels 4L and 4R in the vehicle front-rear direction, and the upper ends thereof are lateral in the vehicle front-rear direction. The lower spring seat 18 is attached to the lower surface of the left and right side frames 14 on the front side of the rod brace 16 and the lower end is received by the lower spring seat 19 attached to the axle pipe 13. Note that the left and right side frames extend in the vehicle width direction at the positions of the left and right side frames 14 to which the upper spring seats 18 are attached, which are on the front side of the vehicle relative to the cross member 15 to which the lateral rod bracket 17 is attached. A cross member 15 for connecting 14 is placed horizontally.

  The left and right shock absorbers 11 as suspension parts are arranged behind the rotational center of the rear wheels 4L and 4R in the longitudinal direction of the vehicle, and the lateral rod 9 is arranged behind them. Here, each of the left and right shock absorbers 11 is connected to a shock absorber bracket 20 whose upper end is bonded to the inner side surface of the side frame 14, and its lower end is a shock bonded to the rear side surfaces of the left and right ends of the rear axle 7. The absorber bracket 21 is connected.

  In the rear suspension 6 configured as described above, the lateral suspension bracket 17 is inclined so as to be located at a higher position on the left side in the vehicle width direction as viewed from the rear of the vehicle and toward the center of the vehicle. A vehicle body side bracket 2 made of sheet metal is fixed to the lower surface. Here, details of the mounting structure of the vehicle body side bracket 2 are shown in FIG. 6. As shown in FIG. 6, the vehicle body side bracket 2 is bent into an L shape, and the flat portion thereof is a lateral rod bracket 17. The lateral rod 9 is fixed to the lower surface of the lateral rod bracket 17 by tightening a bolt 22 which is applied to the lower surface closer to the center of swinging of the lateral rod 9 (the connection point on the vehicle body side) than the intermediate portion in the longitudinal direction. . An engagement claw 2a bent at a substantially right angle is formed at the end of the vehicle body side bracket 2. The engagement claw 2a is a circular engagement hole formed on the lower surface of the lateral rod bracket 17. The vehicle body side bracket 2 is positioned with respect to the lateral rod bracket 17 and prevented from rotating by being inserted into and engaged with 17a.

  As shown in FIG. 4, a flat axle side bracket 23 made of sheet metal is attached to the shock absorber bracket 21 attached to the left end portion of the rear axle 7. Here, the details of the mounting structure of the axle side bracket 23 are shown in FIG. 7. The axle side bracket 23 is attached to the rear surface of the shock absorber bracket 21 by an L-shaped reinforcing member 24 by welding, and the shock absorber bracket 21. Protrudes backwards.

  Thus, both ends of the rear brake hose 3 are fixed to the vehicle body side bracket 2 and the axle side bracket 23. At the position of the vehicle body side bracket 2, the lateral rod bracket 17 is directed rearward from the front side of the vehicle. Is connected to an end portion of the brake pipe 57 on the fixed side that enters the lower part of the brake pipe 58, and is connected to an end portion of the brake pipe 58 on the movable side disposed behind the rear axle 7 at the position of the axle side bracket 23. Specifically, the brake pipe 57 extending from the joint 60 shown in FIG. 1 to the rear of the vehicle is disposed obliquely below the lateral rod bracket 17 as shown in FIG. As shown, it is attached to one end of the rear brake hose 3 and connected to one end of the rear brake hose 3 by a plug 25 fixed to the vehicle body side bracket 2. A brake pipe 58 connected to the wheel cylinder 5L (see FIG. 2) of the brake device provided on the left rear wheel 4L is attached to the other end of the rear brake hose 3 as shown in FIG. It is connected to the other end of the rear brake hose 3 by a plug 26 fixed to. For fixing the plugs 25 and 26 to the vehicle body side bracket 2 and the axle side bracket 23, a known fixing method using an E-ring (also referred to as a retainer) can be employed.

  As described above, the rear brake hose 3 whose both ends are fixed to the vehicle body side bracket 2 and the axle side bracket 23 and is in contact with the brake pipes 57 and 58 is slightly loosened from the vehicle body side bracket 2 to the rear of the lateral rod 9. And is routed to the axle side bracket 23. More specifically, the rear brake hose 3 is bent in a U shape in plan view as shown in FIG. 3, and is bent in a dogleg shape in rear view and side view as shown in FIGS. Routed in state.

  In other words, the vehicle body side bracket 2 holds the axis of the plug 25 so as to be substantially parallel to the lower surface of the lateral rod bracket 17 and the rear brake hose 3 is shown in FIG. It is directed obliquely downward toward the rear of the vehicle, and is directed outward from the axle bracket 23 in the vehicle width direction as shown in FIG. Further, the axle side bracket 23 directs the rear brake hose 3 obliquely upward from the axle side bracket 23 toward the rear of the vehicle as shown in FIG. 4, and the rear brake hose 3 as shown in FIG. The direction center is directed.

  Further, the brake pipe 59 extending from the wheel cylinder 5L (see FIG. 2) of the brake device provided on the left rear wheel 4L extends along the rear axle 7 toward the right side in the vehicle width direction as shown in FIG. The end is connected to the wheel cylinder 5R (see FIG. 2) of the brake device on the right side.

  As described above, in the present embodiment, the rear brake hose 3 is routed so as to pass the rear of the lateral rod 9, which is the part of the rear suspension 6 that is disposed most rearward of the vehicle. Interference with suspension parts such as the rod 9 can be reliably prevented. In particular, in the present embodiment, the vehicle body side bracket 2 that fixes one end (vehicle body side end) of the rear brake hose 3 is attached to a place where the movement of the lateral rod 9 is small (a place near the swinging center of the lateral rod 9). Therefore, the interference between the rear brake hose 3 and the lateral rod 9 can be prevented more reliably.

  In the present embodiment, since the rear brake hose 3 is arranged at a place where there are few arrangement parts and a relatively wide space is secured, the degree of freedom in layout of the rear brake hose 3 is increased.

  Further, by passing the rear brake hose 3 behind the lateral rod 9, suspension parts such as the lateral rod 9 are arranged in front of the rear brake hose 3. The rear brake hose 3 can be protected from flying objects such as pebbles, and the rear brake hose 3 can be prevented from being damaged and its durability can be improved.

  Furthermore, in the present embodiment, the rear brake hose 3 is directed obliquely downward toward the rear of the vehicle by the vehicle body side bracket 2 and outward of the axle side bracket 23 in the vehicle width direction. Can be laid out so as to approach a portion where the movement of the lateral rod 9 is small (a portion close to the swinging center of the lateral rod 9), and interference between the rear brake hose 3 and the lateral rod 9 can be reliably prevented. When the rear wheels 4L and 4R are moved upward (the rear suspension 6 is compressed), the upper part of the rear brake hose 3 on the vehicle body side bracket 2 side and the lower part on the axle side bracket 23 side are displaced in the vehicle width direction. Because of the position (orientation), it is possible to use not only simple bending deformation but also torsional deformation, and the rear brake hose 3 can be easily bent and deformed. Further, the posture of the rear brake hose 3 is stabilized. To do.

  Further, since the vehicle body side bracket 2 is fixed to the lower surface of the lateral rod bracket 17, the rear brake hose 3 can be directed in the above-mentioned direction along the lower surface of the lateral rod bracket 17, and the shape of the vehicle body side bracket 2 is The simplification makes the manufacture easy, and the rear brake hose 3 can be disposed close to the lateral rod bracket 17 to reliably prevent interference between the rear brake hose 3 and the lateral rod 9.

  In addition, in the present embodiment, since the axle side bracket 23 is attached to the shock absorber bracket 21, the axle side bracket 23 can be arranged on the vehicle rear side, and a rear end that is fixed to the axle side bracket 23 is fixed. There is an effect that the interference between the brake hose 3 and the suspension part including the lateral rod 9 can be surely prevented.

2 Car body side bracket 3 Rear brake hose 4L, 4R Rear wheel 5L, 5R Wheel cylinder 6 Rear suspension 7 Rear axle 9 Lateral rod 11 Shock absorber 17 Lateral rod bracket 21 Shock absorber bracket 23 Axle side bracket 57 Fixed brake pipe 58, 59 Movable Side brake piping

Claims (4)

In a vehicle in which the left and right rear wheels are suspended from the vehicle body by shock absorbers, and the rear axle of the rear wheel and the vehicle body are connected by lateral rods arranged in the vehicle width direction, the vehicle is fixed to the stationary brake pipe fixed to the vehicle body and the rear axle. The rear brake hose layout connecting the movable side brake piping,
Both ends of the rear brake hose are fixed to a vehicle body side bracket fixed above the lateral rod of the vehicle body and an axle side bracket fixed to the rear axle, respectively, and the rear brake hose is connected to the lateral rod of the lateral rod from the vehicle body side bracket. A layout of a rear brake hose for a vehicle, wherein the rear brake hose is routed through the rear and routed to the axle side bracket.   The layout of a rear brake hose for a vehicle according to claim 1, wherein the vehicle body side bracket is fixed to a lower surface of a lateral rod bracket that supports one end of the lateral rod to be swingable on the vehicle body.   3. The rear brake hose layout for a vehicle according to claim 2, wherein the brake hose is directed obliquely downward toward the rear of the vehicle by the vehicle body side bracket and outward of the axle side bracket in the vehicle width direction. The layout of the rear brake hose for a vehicle according to any one of claims 1 to 3, wherein the axle side bracket is attached to a shock absorber bracket in which one end of the shock absorber is attached to the rear axle.

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