JPH0310473Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a novel brake hose with an intermediate joint fitting. Furthermore, to be more specific, the present invention is a novel system that can bend piping and hose intermediate at a large angle at the intermediate joint fitting part, without causing contact damage with other parts or bending or deforming the hose part, even in a narrow space. This relates to a brake hose with an intermediate joint fitting.

[Prior Art] Vehicle parts are required to be easy to install on a vehicle and to exhibit sufficient performance after installation.

On the other hand, the space for mounting parts in the vehicle body is extremely limited due to the economic efficiency of the vehicle. For this reason, vehicle parts are required to be able to be quickly installed within a limited space during automobile assembly work, and to have high safety and reliability after installation.

To make the brake hose easier to install, hose terminal fittings are attached to both ends of the hose. However, although a brake hose with only hose end fittings attached to both ends of the hose has good installation workability, it has the disadvantage that it is susceptible to vibration fatigue and deterioration due to contact damage with other attached parts after installation. .

Therefore, in order to avoid vibration fatigue deterioration and contact damage deterioration, brake hoses with intermediate joint fittings attached at the intermediate position of the hose in addition to both ends of the hose, so-called brake hoses with intermediate joint fittings, have been put into practical use.

For example, as for conventional intermediate joint fittings and brake hoses with those intermediate joint fittings,
No. 111920, No. 132324, No. 132324, No. 132324, No. 132324, No. 55-
There are issues such as No. 15483.

The idea of Utility Model Application Publication No. 52-111920 is as follows: ``On a thick base formed at the center of the contact tool, a thin outer cylindrical part that is easily pressed and crimped and extends from the outer periphery of the base in the left and right linear directions is integrally formed. and a brake hose connector comprising a hollow cylindrical body fitted into the cavity of the base.
This is related to.

The brake hose connector invented in Utility Model Application Publication No. 52-111920 inserts the ends of two prepared hoses into the tubular space formed inside the outer cylinder and hollow cylinder that extend in the left and right linear directions. However, by connecting the hoses by pressing and tightening the outside of the outer cylinder, a brake hose with an intermediate joint fitting is obtained.

In addition, the invention of Utility Model Application Publication No. 52-132324 is as follows: ``A flange is provided around the outer periphery of the central part of a double-ended nipple, and after the hose ends are inserted from both the left and right sides of the flange, the hose is crimped. forming an outer cylindrical portion for holding, having a stopper mechanism on one side of the fitting portion to prevent movement of the flange portion in one direction, and mounting the flange portion on the bracket on the other side of the fitting portion; This invention relates to a hose intermediate joint which is provided with a clip groove around the circumference into which a spring clip can be inserted.

The intermediate hose joint devised in Japanese Utility Model Application Publication No. 132324/1983 has two hose ends inserted from both the left and right sides of the flange, that is, the hose ends are inserted between the nipple and the outer cylinder, and then the outside of the outer cylinder is inserted. By crimping, a brake hose with an intermediate joint fitting is obtained.

In other words, the brake hose connector of Utility Model Application Publication No. 52-111920 and the hose intermediate joint of Utility Model Application No. 52-132324 are constructed by inserting two hose ends into both ends of one intermediate joint fitting. Therefore, the outer cylinder is tightened from the outside.

In contrast, the first feature of the intermediate joint fitting proposed in Utility Model Application No. 55-15483 is that the inner cylinder and the outer cylinder are separated. Therefore, when making a brake hose with an intermediate joint fitting, first insert the inner cylinder onto the inner peripheral surface of the hose at a predetermined intermediate position, then fit the outer cylinder onto the outer peripheral surface of the corresponding hose into which the inner cylinder has been inserted. Finally, the outside of the outer cylinder is crimped and fastened. That is, the brake hose with an intermediate joint fitting proposed in Utility Model Application No. 55-15483 has an intermediate joint fitting fastened to the middle of one hose.

On the other hand, as automobiles are required to be smaller and lighter and have more interior space, engine compartments and tire houses are becoming increasingly cramped.As a result, even in extremely narrow spaces, hoses can bend or deform without contacting other parts and causing damage. A brake hose with an intermediate joint fitting that can be installed without any piping is desired.

In addition, conventional brake hoses with intermediate joint fittings can be used not only when changing the piping angle when changing the vehicle model, but also when changing the piping angle during minor changes. It was necessary to change etc.

In response to this request, since the intermediate joint fittings of the three companies mentioned above are all straight fittings, it is impossible to bend the pipe at the intermediate joint fitting part, and it is difficult to meet these requests. Ta.

[Problem to be solved by the invention] The present invention has been made based on the above points, and its purpose is to eliminate the drawbacks of the prior art described above and to solve the problem with other components even in a narrow space. To provide a new brake hose with an intermediate joint fitting that can be bent at a large angle at the intermediate joint fitting part without causing contact damage or bending or deformation of the hose part, and can hold the hose in the middle.

[Means for solving the problem] The gist of the brake hose with intermediate joint fittings of the present invention is that terminal joint fittings are provided at both ends of the hose.
In a brake hose with an intermediate joint fitting formed by fastening an intermediate joint fitting to the middle part of the hose, a metal tube having a specific length and bending angle is connected to the middle part of the intermediate joint fitting.

That is, the intermediate joint metal fitting used in the brake hose with intermediate joint metal fitting of the present invention includes an intermediate joint metal base having a fixing portion for attaching to another member, two hose fittings connected to both sides of the intermediate joint metal base, It consists of a caulking part, the two hoses are inserted into the caulking part, one of the hoses is inserted in the caulking part, and there is a length L (mm) between the caulking part and the base of the intermediate joint fitting. The diameter is D (mmφ), the bending angle is α (°),
When the circumference is π, L≧2D+(πDα/90) ... (1 formula) An intermediate joint fitting characterized by being formed by connecting metal tubes bent at a bending angle α. It is located on the attached brake hose.

In the present invention, the bent metal tube may be any tube that can withstand braking pressure and can be bent at any angle, such as a steel tube, a copper tube, an aluminum tube, or an alloy tube thereof.

In the present invention, the length L of the metal tube is limited to L≧2D+(πDα/90) (Equation 2) for the following reasons. In other words, when L<2D+(πDα/90)...(Equation 3), the metal tube cannot be bent at a large angle, and if it is forcibly bent, crushing deformation of the metal tube is unavoidable. .

In other words, in general, when a metal tube is bent by a bending angle α (°), the radius of the resulting arc is r (mm), and the length of the arc is A (mm), then A = 2rπ (α / 360) ... (4 Because of the relationship (formula), the required length of the metal tube is A (mm)
That would be a good thing.

However, in a brake hose with intermediate joint fittings, which has terminal joint fittings fastened to both ends of the hose and intermediate fitting fittings fastened to the middle part of the hose, it is difficult to insert two hoses, or to insert one of the hoses into the crimped part. When a metal pipe with a bent part length of A (mm) is connected between the caulked part and the base of the intermediate joint fitting,
It is difficult to bend at a large angle, which is the purpose of the present invention. If the metal tube is forcibly bent, the metal tube will be crushed and deformed, and when the resulting brake hose with intermediate joint fittings is installed in a car, it will undergo severe repeated vibration deterioration, resulting in fatigue deterioration of the bent metal tube. The problem is that it becomes large.

Therefore, as a result of intensive study, the inventor of the present invention found that when the metal tube is lengthened on both sides by the outer diameter (i.e., lengthened by 2D), the metal tube can be bent while completely preventing crushing, and the bending angle is When the radius r (mm) of the circular arc obtained when bent by α (°) is twice the outer diameter D (mmφ) of the metal tube (i.e., r = 2D), crushing of the metal tube can be completely suppressed. However, it was discovered that it could be bent, and this led to the invention.

Therefore, first, the length L of the metal tube is expressed using (4 formula): L≧2D+A=2D+2rπ(α/360)
...(Formula 5) Next, by substituting r=2D, L≧2D+[2・2Dπ(α/360)]
...(Equation 6) If we rearrange Equation 6 here, we obtain Equation 1.

L≧2D+(πDα/90) (1 formula) In the present invention, the metal tube can be bent at any arbitrary angle, for example, at a large angle of around 70°.

[Function] The brake hose with an intermediate joint fitting of the present invention includes an intermediate joint fitting base having a fixing portion for attaching to another member at the intermediate portion of the hose, two hose fittings connected to both sides of the intermediate fitting fitting base, By using an intermediate joint fitting consisting of a crimped part, two hoses whose one end is inserted and crimped into a terminal joint fitting that can be fixed to the vehicle body are connected to one brake hose with an intermediate joint fitting, In addition, the two hoses are inserted into the intermediate joint fitting, one of the hoses is inserted into the crimped part, and the length is L (mm) and the outer diameter is set between the crimped part and the base of the intermediate joint fitting. When D (mmφ), bending angle is α (°), and pi is pi, L≧2D+(πDα/90) ...(Equation 1) A metal tube with a length of can be bent at a bending angle α. By connecting the metal tubes, in addition to the length of the bent part (πDα/90), a straight part is provided on both sides for a distance equal to or longer than the outer diameter of the metal pipe, which allows the metal pipe parts to be bent significantly. This effectively prevents the hose from collapsing and deforming, making it possible to bend the metal tube at a large angle without bending the hose section, which is prone to deformation when bent significantly, and as a result, a large number of vehicle parts can be attached. By bending piping at a large angle, for example around 70°, even in narrow spaces where the vehicle is used, it contributes significantly to reducing the size and weight of vehicles, and also prevents damage, deterioration, and harsh repetition caused by contact with other vehicle parts. Completely suppresses vibration fatigue deterioration.

In addition, in the brake hose with intermediate joint fitting of the present invention, the bending angle of the bent metal pipe part of the intermediate joint fitting can be easily and freely changed, so that the piping angle of the brake hose with intermediate joint fitting can be changed during minor vehicle changes, etc. It is possible to quickly respond to requests for minor piping changes for vehicle models.

Furthermore, although the intermediate joint fitting of the brake hose with intermediate joint fitting of the present invention can be bent at any large angle, the intermediate fitting is made of one piece, so it is difficult to connect two hoses via a conventional bracket. It is much smaller, lighter and cheaper than other connections.

Therefore, the brake hose with intermediate joint fitting of the present invention can significantly improve brake safety reliability due to these synergistic effects.

[Example] Next, an example of the brake hose with intermediate joint fitting of the present invention will be described.

FIG. 1 is a plan view showing an embodiment of a brake hose with an intermediate joint fitting of the present invention.

In FIG. 1, 1 is a brake hose, and this type of brake hose has a first synthetic fiber reinforcing layer provided on a styrene-butadiene rubber tube.
A natural rubber intermediate layer is provided thereon, a second synthetic fiber reinforcing layer is provided on top of the natural rubber intermediate layer, and a chloroprene rubber layer is extruded and coated as the outermost layer. Reference numeral 2 is a base of the intermediate joint fitting, 5, 5 is a part into which the hose is inserted and crimped, and 6 is a part that is fixed to the vehicle body.

In FIG. 1, numeral 3 is a spectacle fitting which is a kind of hose end fixing fitting, and 4 is a female fitting.

In FIG. 1, 21 is a bent metal tube that characterizes the present invention, and the bent metal tube 21 of one embodiment has a length L = 39 (mm), an outer diameter D = 7 (mmφ), and a bending angle =
It is 70°.

Here, the length L of the metal tube 21 is 39 (mm).
This is 5 mm longer than the L value calculated using Equation 1.

In the thus obtained embodiment of the brake hose with the intermediate joint fitting of the present invention, the metal tube 21 does not collapse or deform even when bent at an angle of 70 degrees, and as a result, it can be bent at an angle of 70 degrees as shown in FIG. Even in such a narrow tire house, we have created piping that can completely prevent damage and deterioration due to contact with other vehicle parts and deterioration due to vibration fatigue due to severe repeated vibrations.As a result, it significantly contributes to reducing the size and weight of vehicles, as well as providing intermediate joint fittings. The safety and reliability of the brake hose was also significantly improved.

In other words, Fig. 2 shows an example of a brake hose with an intermediate joint fitting according to the present invention attached to a brake system of a passenger car, in which 7 is a brake hose support bracket, 8 is a disc plate, and 9 is a brake hose support bracket for a passenger car. is a knuckle arm, 10 is an adapter plate, 11 is a wheel cylinder, and 12 is a disc brake.

In addition, as Example 2, the metal pipe 21 connected between the hose insertion and caulking part of the intermediate joint fitting and the base of the intermediate joint fitting was set to have the same length as the L value calculated by equation 1, and as Example 3. The same L value + 10 mm length, and the same L value + 15 mm as in Example 4.
As a result, the same effect as in Example 1 could be obtained.

On the other hand, in Comparative Example 1, the length of the metal pipe connected between the hose fitting and crimping part of the intermediate joint fitting and the base of the intermediate fitting fitting was set to be L value -5 mm from the L value calculated using equation 1. Similarly, in Comparative Example 2, a brake hose with an intermediate joint fitting was made in the same manner as in Example 1 except that the length was set to be L value minus 10 mm, but when bent at an angle of 70°, the metal tube was crushed and deformed, making it impossible to put it into practical use. I couldn't do it.

[Effects of the invention] The brake hose with intermediate joint fitting of the invention has the following effects and is industrially useful.

(1) The brake hose with intermediate joint fittings of this invention is
Since it can be bent at any large angle, for example around 70 degrees, it significantly contributes to reducing the size and weight of vehicles, and also prevents damage and deterioration due to contact with other vehicle parts and vibration fatigue due to severe repeated vibrations. As a result, the safety and reliability of the brake hose with intermediate joint fittings can be significantly improved.

(2) The brake hose with intermediate joint fittings of this invention is
Since the bending angle of the bent metal pipe portion of the intermediate joint fitting can be easily and freely changed, it is possible to quickly respond to changes in the piping angle of the brake hose with the intermediate joint fitting, etc. during minor vehicle changes. In addition, it is possible to quickly respond to demand for similar vehicle models.

(3) The brake hose with intermediate joint fittings of this invention is
Although the intermediate joint fitting used can be bent at any large angle, it is made of a single piece, so it is small, lightweight, and inexpensive.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of a brake hose with an intermediate joint fitting of the present invention, and Fig. 2 shows an example of the brake hose with an intermediate joint fitting of an embodiment of the present invention being attached to a passenger car. It is a front explanatory view. 1... Brake hose, 2... Intermediate joint fitting base, 3... Glasses fitting, 4... Female fitting, 5
...Hose fitting, caulking part, 6...Mounting fixing part, 21...Bent metal pipe, 7...Brake hose support bracket, 8...Disc plate, 9
...Natsukuru arm, 10...Adapter plate, 11...Wheel cylinder, 12...Disc brake.

Claims (1)

[Scope of Claim for Utility Model Registration] There are two brake hoses, one end of which is fitted and crimped into a fixing fitting to the vehicle body, and the other end of each of the two brake hoses is connected by an intermediate fitting. In the brake hose with an intermediate joint fitting, the intermediate joint fitting has an intermediate joint fitting base having a fixing part for attaching to another member, and two hoses connected to both sides of the intermediate fitting fitting base, which are inserted and crimped. consisting of two hose fittings,
The length of the fitting tube is L (mm), the outer diameter of the fitting tube is D (mmφ), and the length of the fitting tube is L (mm). When the bending angle is α (°) and the circumference is π, the intermediate tube is formed by connecting metal tubes bent at a bending angle α, each having a length of L≧2D+(πDα/90). Brake hose with fittings.