JP2014163489A - Piping - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide piping which can effectively make compatible easy handling in a limited space and the suppression of vibration.SOLUTION: Piping 7 comprises: a flexible piping main body 71 for transporting fluid which has attached parts 71b attached to attaching parts arranged at a brake booster being one member and at an air intake conduit being the other member, respectively, and bent parts 71a which are formed by bending prescribed points between the attached parts 71b; and a rigid support body 72 which has fixed parts 72b fixed to the attachment parts of the brake booster and the air intake conduit, and abutting parts 72a extending to the internal face side of the piping main body 71 from the fixed parts 72b, and abutting on recessed faces of internal faces of the bent parts 71a.

Description

  The present invention relates to a pipe structure that connects one apparatus to another apparatus and is routed in a limited space.

  Conventionally, various support structures for piping routed in a narrow space have been proposed (see, for example, Patent Document 1). The thing of this patent document 1 is the structure of the piping for guiding the refrigerant | coolant of the air conditioner for motor vehicles, Comprising: When a weight is attached, piping itself is caused by the vibration caused by the behavior in piping. It is intended to suppress interference, collision and damage to the object, and transmission of the vibration to the vehicle body. In addition, there are other measures to suppress the vibration of the pipe in this way, such as attaching a special protector to the middle part of the pipe or fixing the middle part of the pipe to the vehicle body side with a clamp or the like. Can be mentioned.

  Other pipes in such a narrow space include a hydraulic pipe of a power steering device, a pipe connecting a brake booster and an intake pipe of an internal combustion engine, and the like.

  However, in any of the above-described piping structures, the space for piping is limited, and it is not always possible to provide a place where a part in the middle can be fixed, and the cost of providing the protector, the clamp, etc. Invite to rise. In addition, when a special weight is provided on the pipe as in Patent Document 1, it is difficult to handle the pipe by the volume of the weight, or other problems such as an increase in the overall weight are caused.

JP 2003-343642 A

  The present invention focuses on the above-described problems, and an object of the present invention is to provide a pipe capable of effectively achieving both easy handling within a limited space and vibration suppression.

  In order to achieve such an object, the present invention takes the following measures.

  That is, the pipe according to the present invention has a mounted portion that is attached to each of the mounting portions provided on one member and the other member, and a bent portion that is formed by bending a predetermined portion between the mounted portions. A pipe main body for transporting a fluid having flexibility, a fixed part fixed to the attachment part of the one member or the other member, and extending from the fixed part to the inner surface side of the pipe main body And a rigid support having an abutting portion that abuts against a concave surface of the inner surface of the bent portion.

  Here, the “fluid” corresponds to various types of fluid that can flow in the pipe, such as liquid or gas, or liquid or gas partially containing solid.

  If this is the case, the piping main body is supported by the position of the concave surface of the bent portion, i.e., the convex surface viewed from the outside by the contact portion of the support from the inside, thereby suppressing the vibration of the piping, and by vibration. It can also be effectively avoided that the bent portion moves greatly. As a result, it is possible to realize a pipe in which vibration is effectively suppressed, and even in a state in which the vibration is routed in a narrow space, it is possible to effectively suppress the middle portion from colliding with another object.

  ADVANTAGE OF THE INVENTION According to this invention, the piping which can make effective handling and suppression of a vibration in the limited space effectively compatible is provided.

The typical block diagram which concerns on one Embodiment of this invention. Explanatory drawing of the principal part which concerns on the same embodiment. The exploded view of the principal part. The typical sectional view of the principal part. The figure corresponding to FIG. 4 which concerns on the modification of the embodiment. Explanatory drawing which concerns on the other modification of the embodiment. The figure corresponding to FIG. 3 which concerns on the other modification of the embodiment.

  An embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows an outline of a part of the vehicle internal combustion engine. The internal combustion engine in the present embodiment is a spark ignition gasoline engine and includes a plurality of cylinders (not shown). The intake passage 3 for supplying intake air takes in air from the outside and guides it to the intake port of each cylinder 1. On the intake passage 3, an air cleaner 31, an electronic throttle valve 32, a surge tank 33, and an intake manifold 34 are arranged in this order from the upstream.

  A brake booster 5 is attached to the vehicle of this embodiment. The brake booster 5 introduces intake negative pressure from a portion of the intake passage 3 on the downstream side of the throttle valve 32, more specifically, from the surge tank 33, and boosts the pedaling force of the brake pedal 6 using the negative pressure. It is widely known in this field. The brake booster 5 has a constant pressure chamber for storing negative pressure and a variable pressure chamber for applying atmospheric pressure, and the constant pressure chamber is connected to the surge tank 33 via the negative pressure line 51. The negative pressure line 51 guides the intake negative pressure downstream of the throttle valve 32 to the constant pressure chamber. The negative pressure line 51 is provided with a check valve 52 for keeping the negative pressure in the constant pressure chamber and preventing the positive pressure from being applied to the constant pressure chamber.

  When the brake pedal 6 is not operated by the driver, the constant pressure chamber and the variable pressure chamber communicate with each other, and the variable pressure chamber is isolated from the atmospheric pressure. When the brake pedal 6 is operated, the space between the constant pressure chamber and the variable pressure chamber is cut off, and the atmosphere is introduced into the variable pressure chamber. As a result, the pressure difference between the constant pressure chamber and the variable pressure chamber becomes a control pressure that boosts the depression force of the brake pedal 6. The brake pedal force amplified by the brake booster 5 is converted into hydraulic pressure in a master cylinder (not shown), and is supplied to a brake device (not shown) such as a brake caliper and a wheel cylinder via a hydraulic circuit (not shown). Communicated.

  Therefore, in the present embodiment, the negative pressure pipe 51 provided between the brake booster 5 and the intake pipe 3 is mainly composed of the pipe 7. The pipe 7 includes a mounted portion 71b that is attached to each of the mounting portions 5a and 3a provided on the brake booster 5 that is one member and the intake pipe 3 that is the other member, and between these mounted portions 71b. A pipe body 71 for transporting a flexible fluid having a bent portion 71a formed by bending a predetermined portion, and a fixed portion fixed to the mounting portions 5a and 3a of the brake booster 5 and the intake pipe 3 And a rigid support 72 having a contact portion 72a that extends from the fixed portion 72b to the inner surface side of the pipe body 71 and contacts the concave surface of the inner surface of the bent portion 71a. It is characterized by.

  Hereinafter, the specific structure of the piping will be described with reference to FIGS. In this embodiment, as shown in FIG. 4, a separate ring 73 is attached so that the fixed portion 72b of the pipe main body 71 is securely fixed to the attachment portions 5a, 3a. Since various things are applicable, detailed description is abbreviate | omitted.

  The pipe body 71 is a tubular body made of a material such as flexible synthetic resin or rubber, for example. In the present embodiment, the bent portion 71a is formed by bending four locations during molding. Both ends of the pipe main body 71 serve as fixed portions 72b to be attached to the attachment portions 5a and 3a provided in the brake booster 5 and the intake pipe 3. The fixed portion 72b is attached while being appropriately extended when attached to the attachment portions 5a and 3a, so that the airtightness in the pipe main body 71 is maintained.

  The support 72 is configured by appropriately bending and forming a wire made of a material having shape retaining properties such as metal or hard resin. As shown in FIG. 4, the support 72 has a fixed portion 72 b in which the vicinity of both ends is appropriately curved. The fixed portion 72b is fitted on the convex portions 5b and 3b provided on the brake booster 5 and the attachment portions 5a and 3a of the intake pipe 3, and the pipe body 71 and the ring 73 are attached to the attachment portions 5a and 3a. If it is clamped by the piping main body 71 and the attachment parts 5a and 3a, it will be firmly fixed.

  Therefore, in this embodiment, the support body 72 has a contact portion 72a that can hold the shape of the pipe main body 71 by contacting the bent portion 71a by appropriately bending and forming four intermediate portions. Yes. Specifically, the abutting portion 72a is set to abut against a concave surface where the material is deformed in a concave shape on the inner surface side outside the bent portion 71a. Thereby, the shape of the bending part 71a of the piping main body 71 can be hold | maintained stably.

  With the configuration as described above, in the pipe 7 according to this embodiment, the pipe main body 71 supports the position of the concave surface of the bent portion 71a, that is, the convex surface viewed from the outside by the contact portion 72a of the support body 72 from the inside. As a result, the vibration of the pipe 7 is suppressed, and as a result, the bending portion 71a can be effectively avoided from moving greatly due to the vibration. As a result, the pipe 7 is realized in which vibration is effectively suppressed, and even in a state in which the vibration is routed in a narrow space, it is possible to effectively suppress the middle portion from colliding with another object.

  In particular, in this embodiment, vibration can be suppressed without requiring a special clamp or protector for the pipe 7, and an increase in cost is effectively avoided.

<Modification>
Hereinafter, each modification of the present embodiment will be described. In these modified examples, components corresponding to the components of the above embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 5 shows that the pipe body 71 is sandwiched when fixed to the attachment portions 5a and 3a by providing a folded portion formed by folding the material at the end of the support 72. Further, it can be firmly fixed to the attachment portions 5a and 3a. FIG. 6 shows that the end portion of the support body 72 is an annular portion 72d formed into an annular shape, thereby realizing accurate positioning with respect to the attachment portions 5a and 3a. Even if it is like these, the same effect as the above-mentioned embodiment can be produced.

  Further, FIG. 7 shows a pipe body 71S which is formed in a straight tube shape without forming a bent portion 71a in advance, unlike the pipe body 71 of the above embodiment. In this case, the bent portion 71a is appropriately formed according to the contact portion 72a formed on the support 72 when the support 72 is assembled.

  Although the embodiment of the present invention has been described above, the specific configuration of each unit is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the above-described embodiment, a mode is disclosed in which a brake booster pipe provided in an automobile is disclosed. Of course, the present invention may be applied to a pipe for transporting hydraulic fluid in a hydraulic circuit. . Further, specific modes of the intake pipe line and the brake booster are not limited to those of the above embodiment, and various modes including the existing ones can be applied.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be used as a pipe connected between one device and another device and routed in a limited space.

3. One member (intake pipe)
5 ... Other parts (brake booster)
3a, 5a ... mounting portion 7 ... piping 71 ... piping main body 72 ... support 71a ... bent portion 71b ... attached portion 72a ... contact portion 71b ... fixed portion

Claims (1)

A flexible fluid having a mounted portion that is respectively attached to a mounting portion provided in one member and another member, and a bent portion formed by bending a predetermined portion between the mounted portions. A piping body for transportation;
A fixed portion fixed to the mounting portion of the one member or the other member, and a contact portion that extends from the fixed portion to the inner surface side of the pipe body and contacts the concave surface of the inner surface of the bent portion. And a support body having rigidity.

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