JP2021154819A - Brake hose - Google Patents

Abstract

To provide a brake hose which requires only one discharge hole for deriving a brake hose to the outside even if a vehicle is a type of a traction vehicle.SOLUTION: In a brake hose 10 of a cabin 1 in which a first operation device 3 for operating a parking brake, and a second operation device 4 for operating a trailer brake are arranged, a pair of sub-pipes 11, 12 and one main pipe 13 are formed into fork shapes at which the pipes are merged with one another in a merging part 14, a terminal end of the first sub-pipe 11 is connected to the first operation device 3, and compressed air flows into the sub-pipe 11 when an operation of the parking brake is released. A terminal end of the second sub-pipe 12 is connected to the second operation device 4, and compressed air flows into the second sub-pipe 12 when the trailer brake is operated. A tip of the main pipe 13 is derived from a discharge hole 5 formed in the cabin 1 to the outside of the cabin 1.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a brake hose, and more particularly to a brake hose connected to a parking brake activator and a trailer brake activator inside the cabin of a towed vehicle.

Inside the passenger compartment of a towed vehicle that pulls a towed vehicle such as a trailer, a parking brake actuating device (see, for example, Patent Document 1) and a trailer brake actuating device (see, for example, Patent Document 2) are provided. Two actuators are provided.

Japanese Unexamined Patent Publication No. 11-139301 Japanese Unexamined Patent Publication No. 4-254243

By the way, brake hoses through which compressed air flows are connected to each operating device, and each brake hose is led out to the outside of the passenger compartment from different discharge holes. That is, it was necessary to provide two discharge holes for leading out different brake hoses to the outside on the floor panel of the passenger compartment of the towing vehicle. Therefore, it is not possible to divert the cabin or floor panel of a non-towing vehicle (for example, a truck) provided with only the parking brake actuating device, and the cabin or floor panel of the towing vehicle must be manufactured exclusively. , The cost was high.

An object of the present disclosure is to provide a brake hose that requires only one discharge hole for leading the brake hose to the outside even in a towing vehicle.

The brake hose of one aspect of the present invention that achieves the above object is a pair of secondary brake hoses in a passenger compartment in which a first actuating device for operating a parking brake and a second actuating device for operating a trailer brake are arranged. Each of the pipe and one main pipe has a bifurcated shape at the confluence, and the end of one of the pair of sub-pipes is connected to the first actuating device. The configuration is such that compressed air flows inside when the operation of the parking brake is released, the end of the other sub-tube of the pair of sub-pipes is connected to the second actuating device, and the other sub-pipe is the said. The structure is such that compressed air flows inside when the trailer brake is operated, and the tip of the main pipe is led out to the outside of the passenger compartment from a discharge hole formed inside the passenger compartment.

According to one aspect of the present invention, by merging the hose for the parking brake and the hose for the trailer brake inside the passenger compartment into one hose, only one discharge hole is required to be led out to the outside. Can be done.

It is a block diagram which illustrates the arrangement structure of the brake hose of an embodiment. It is an enlarged view which enlarged the vicinity of the confluence part of FIG.

Hereinafter, embodiments of the brake hose in the present disclosure will be described. In the figure, the X direction and the Y direction are the directions orthogonal to each other on the plane parallel to the floor panel 2 of the passenger compartment 1, and the Z direction is the direction perpendicular to the floor panel 2. Further, the filled arrow indicates the flow of the compressed air Ap discharged from the first operating device 3, and the white arrow indicates the flow of the compressed air At discharged from the second operating device 4. In addition, the tip of each pipe and each hose is on the downstream side with respect to the flow of compressed air Ap and At, and the end is on the upstream side with respect to the flow of compressed air Ap and At.

As illustrated in FIG. 1, the brake hose 10 of the embodiment is a hose arranged inside the passenger compartment 1 of a towing vehicle such as a trailer, and compresses air Ap and At are applied to the vehicle when various brakes are activated or not activated. It leads to the outside of the room 1.

The floor panel 2 of the vehicle interior 1 is provided with a first actuating device 3 for operating a parking brake (also referred to as a parking brake or an emergency brake) and a second actuating device 4 for operating a trailer brake. The first actuating device 3 and the second actuating device 4 are not limited to those installed on the floor panel 2, and the operation is not limited to the manual type. For example, in the case of the manual type, each of the first actuating device 3 and the second actuating device 4 may be installed on a steering column (not shown) or on a side panel (not shown) of the vehicle interior 1. Further, in the case of a foot-operated type, it may be arranged side by side with the brake pedal or the accelerator pedal.

The parking brake is mounted on the towing vehicle and is mainly installed on the drive wheels. The parking brake is operated by compressed air supplied from the relay valve for the parking brake. Compressed air is supplied to the spring brake chamber, and the operation is released by pressurizing the champer, and the compressed air to the chamber is released. The chamber is decompressed and operates by stopping the supply of.

The trailer brake is mounted on the towed vehicle and is provided on the driven wheel of the towed vehicle. The trailer brake is operated by the compressed air supplied from the relay valve for the trailer brake, and operates by supplying the compressed air to the brake chamber and pressurizing the chamber to supply the compressed air to the chamber. By stopping, the chamber is depressurized and the operation is released.

The first operating device 3 controls the signal pressure of the relay valve for the parking brake by the compressed air Ap, and the parking brake is operated by stopping the flow of the compressed air Ap by the first operating device 3 to operate the compressed air Ap. The parking brake is released by flowing.

The second actuating device 4 controls the signal pressure of the relay valve for the trailer brake by the compressed air At, and the trailer brake is actuated by flowing the compressed air At by the second actuating device 4 to control the flow of the compressed air At. By stopping, the trailer brake is released.

The brake hose 10 is formed in a bifurcated shape in which each of the pair of sub-pipes 11, 12 and one main pipe 13 joins at the merging portion 14. Specifically, the brake hose 10 is configured to include one metal bifurcated pipe 15 and a pair of hoses 16 and 17, and the bifurcated pipe 15 has a tip portion and a confluence portion 14 of the pair of auxiliary pipes 11 and 12 respectively. And the main pipe 13, and the pair of hoses 16 and 17 form a portion of the pair of sub pipes 11 and 12 excluding the respective tip portions.

In the following, one of the pair of sub-tubes 11 and 12 will be referred to as the first sub-tube 11, and the other sub-tube will be referred to as the second sub-tube 12. Further, one of the pair of hoses 16 and 17 is referred to as a first hose 16, and the other hose is referred to as a second hose 17.

The first sub-pipe 11 is a pipe whose tip merges with another pipe at the merging portion 14 and whose end is connected to the first actuating device 3. In the first auxiliary pipe 11, the compressed air Ap does not flow while the parking brake is operating by the first operating device 3, and the compressed air Ap is directed from the end to the tip when the parking brake is released by the first operating device 3. It will be in a flowing state. In the present disclosure, the compressed air Ap that flows when the parking brake is released is the signal pressure of the relay valve for the parking brake, and does not always flow during the release of the parking brake.

The second sub-pipe 12 is a pipe whose tip merges with another pipe at the merging portion 14 and whose end is connected to the second actuating device 4. In the second auxiliary pipe 12, the compressed air At flows from the end to the tip when the trailer brake is operated by the second actuating device 4, and the compressed air At flows while the trailer brake is released by the second actuating device 4. It will be in a non-existent state. In the present disclosure, the compressed air At that flows when the trailer brake is operated is the signal pressure of the relay valve for the trailer brake, and does not always flow during the operation of the trailer brake.

The main pipe 13 is a pipe whose end is a confluence and merges with another pipe, and its tip is led out to the outside of the passenger compartment 1 from a discharge hole 5 formed in the floor panel 2 of the passenger compartment 1. In the main pipe 13, compressed air Ap flows when the parking brake is released while the trailer brake is released, compressed air At flows when the trailer brake is operated while the parking brake is operating, and the parking brake is released and the trailer brake is released. When the operation of the above is performed at the same time, both the compressed air Ap and the compressed air At flow, and neither of the compressed air flows while the parking brake is operating and the trailer brake is released.

The bifurcated pipe 15 is a metal pipe, and constitutes a tip portion of each of the pair of auxiliary pipes 11 and 12, a confluence portion 14, and a main pipe 13. In the present disclosure, the respective tip portions of the pair of sub-tubes 11 and 12 indicate a portion in the vicinity of the merging portion 14, and the merging portion 14 is a portion that does not bend at an intermediate position until merging. A steel pipe is exemplified as the bifurcated pipe 15.

Each of the first hose 16 and the second hose 17 is a hose configured to be flexible. Examples of the flexible hose include a hose made of rubber or resin and a metal bellows tube. The first hose 16 constitutes a portion excluding the tip portion of the first auxiliary pipe 11, and the second hose 17 constitutes a portion excluding the tip portion of the second auxiliary pipe 12.

As illustrated in FIG. 2, the merging portion 14 is a portion where the pipes merge. At the merging portion 14, the tip of the first sub-tube 11 and the tip of the second sub-tube 12 branch at an acute angle θ. That is, the bifurcated pipe 15 branches at an acute angle θ from the side of the main pipe 13 at the tip toward the end.

In the present disclosure, the acute angle θ is such that the tip portion of the tube axis L1 at the tip of the first sub-tube 11 is one side and the tip portion of the tube axis L2 at the tip of the second sub-tube 12 is the other side. The angle between those two sides. That is, assuming that the pipe axis L1 is oriented in the Y direction, the direction in which the pipe axis L2 is tilted so that the tip side is located below the end side in the Y direction with respect to the X direction (in other words, with respect to the Y direction). The tip side is inclined so as to be located to the right in the X direction with respect to the end side).

The acute angle θ is less than 90 degrees (the angle with respect to the center of the arc that divides the circumference into 360 equal parts, and the symbol is “°”). In the present embodiment, the acute angle θ is preferably set to an angle at which the compressed air At flowing from the second auxiliary pipe 12 does not flow back to the first auxiliary pipe 11, and is larger than 0 degrees (excluding 0 degrees). , 80 degrees or less (including 80 degrees) is more desirable.

Further, at the merging portion 14, the tip portion of the first sub-pipe 11 and the main pipe 13 merge in a straight line. That is, the bifurcated pipe 15 is a state in which the second auxiliary pipe 12 inclined from the Y direction joins the straight pipe whose axial direction is the Y direction, which is composed of the tip end portion of the first auxiliary pipe 11 and the terminal portion of the main pipe 13. And forms a "T" shape. In the present disclosure, the linear shape means that the pipe axis L1 at the tip of the first sub-tube 11 and the pipe axis L3 at the end of the main pipe 13 are coaxial, and the tip of the first sub-tube 11 and the end of the main pipe 13 are coaxial. It is shown that each of the above does not bend in the middle position. Further, the "T" shape indicates a shape in which other pipes are connected so as to intersect a straight pipe, and does not mean a shape in which the respective pipes are orthogonal to each other.

In addition, in the merging portion 14, the pipe diameter R1 at the tip of the first auxiliary pipe 11 is thicker than the pipe diameter R2 at the tip of the second auxiliary pipe 12, and is the same as the pipe diameter R3 at the end of the main pipe 13. be. The pipe diameter R3 at the end of the main pipe 13 is smooth when the parking brake is being released and the trailer brake is operating, and when both compressed air Ap and compressed air At flow in. It is set to flow to.

As described above, the brake hose 10 of the present disclosure is formed on the floor panel 2 by merging the parking brake hose and the trailer brake hose inside the passenger compartment 1 to form one hose. It is possible to use only one discharge hole 5 for leading out the above. As a result, the passenger compartment and floor panel of a non-towing vehicle (for example, a truck) can be diverted as the passenger compartment 1 and floor panel 2 of the towing vehicle, and the manufacturing cost can be kept low.

Further, the brake hose 10 is configured such that the pair of auxiliary pipes 11 and 12 branch at an acute angle θ at the confluence portion 14, so that the brake hose 10 reaches the first auxiliary pipe 11 of the compressed air At flowing from the second auxiliary pipe 12. Backflow can be prevented. The acute angle θ may be less than 90 degrees, but it is desirable that the acute angle θ is set to an angle of 80 degrees or less. When the acute angle θ is set to an angle of 80 degrees or less, it is advantageous to more reliably prevent the backflow of the compressed air At flowing from the second auxiliary pipe 12 to the first auxiliary pipe 11.

In the present embodiment, the connection shape of each pipe at the merging portion 14 is a "T" shape, but the pair of sub pipes 11 and 12 may branch to an acute angle θ, and the connection shape may be a "Y" shape. good. On the other hand, the connection shape is a "T" shape, and the first sub-pipe 11 and the main pipe 13 are linearly merged at the merging portion 14, so that the merging portion 14 flows more frequently than the compressed air At. It is advantageous for the high compressed air Ap to flow smoothly to the main pipe 13 while preventing the backflow to the second sub pipe 12. Further, for the same reason, it is more effective to make the pipe diameter R1 of the first sub pipe 11 and the pipe diameter R3 of the main pipe 13 thicker than the pipe diameter R2 of the second sub pipe 12 at the merging portion 14.

In the brake hose 10, the first sub-pipe 11 and the main pipe 13 are composed of one hose, the second sub-pipe 12 is composed of a separate hose, and the hose forming the first sub-pipe 11 and the main pipe 13 is in the middle. The hose constituting the second auxiliary pipe 12 may be connected to the position, or the first auxiliary pipe 11, the second auxiliary pipe 12, and the main pipe 13 may be composed of one bifurcated hose.

The brake hose 10 of the present embodiment includes one metal bifurcated pipe 15 and a pair of hoses 16 and 17. That is, by forming the merging portion 14 with the bifurcated pipe 15, it is advantageous to improve the durability of the merging portion 14, and the parking brake is released and the trailer brake is operated at the same time to perform the compressed air Ap. Even if both the compressed air and the compressed air At flow into the merging portion 14, both compressed air can be smoothly discharged to the outside.

The bifurcated pipe 15 constitutes the tip of the first sub-pipe 11, the tip of the second sub-pipe 12, the confluence 14 and the end of the main pipe 13, and the tip is separately provided from the discharge hole 5. A flexible hose led out to the outside may be provided.

1 Vehicle compartment 2 Floor panel 3 1st actuating device 4 2nd actuating device 10 Brake hose 11, 12 Pair of sub-pipes (first sub-pipe, second sub-pipe)
13 Main pipe 14 Confluence 15 Bifurcated pipe 16, 17 Pair of hoses (first hose, second hose)

Claims (4)

In the brake hose of the passenger compartment in which the first actuating device for operating the parking brake and the second actuating device for operating the trailer brake are arranged.
Each of the pair of sub-pipes and one main pipe forms a bifurcated shape that merges at the confluence.
The end of one of the pair of sub-tubes is connected to the first actuating device, and the one sub-tube has a configuration in which compressed air flows inside when the operation of the parking brake is released.
The end of the other sub-tube of the pair of sub-tubes is connected to the second actuating device, and the other sub-tube has a configuration in which compressed air flows inside when the trailer brake is operated.
A brake hose characterized in that the tip of the main pipe is led out to the outside of the passenger compartment from a discharge hole formed inside the passenger compartment. The brake hose according to claim 1, wherein the pair of auxiliary pipes branch at an acute angle at the merging portion. The brake hose according to claim 2, wherein at the merging portion, the one sub-pipe and the main pipe merge in a straight line. Equipped with one metal bifurcated tube and a pair of hoses,
Claim that the bifurcated pipe constitutes each tip portion of the pair of sub-tubes, the confluence portion and the main pipe, and the pair of hoses constitutes a portion excluding the respective tip portions of the pair of sub-tubes. The brake hose according to any one of 1 to 3.

Images