KR200445091Y1 - Hydraulic Hose, Pipe, and Socket Assembly for Automobile Power Steering - Google Patents

Abstract

The present invention relates to a hydraulic hose, a pipe, and a socket assembly for a steering apparatus of a vehicle, and more particularly, in the hydraulic hose, pipe, and socket assembly for a steering apparatus of a vehicle, circular expansion parts 62 and 64 and a locking jaw part. The metal pipe 60 is formed by a single molding, and is formed by a drawing process so that the through holes 71 are provided at the side cross sections, and the through holes 71 form the circular expansion portions 62 and 64. The hydraulic pressure is inserted into the space formed between the socket 70 is inserted into the pipe 60 so as to be caught by the locking jaw 66, and a portion is formed between the outer surface of the pipe 60 and the inner surface of the socket 70. Comprises a hose (50); The metal pipe 60 has, from its distal end, a first-round inclined portion 62 formed by a first-rising slope 62a and a first-fall slope 62b, and a second-rise slope 64a. And a second circular expansion portion 64 formed by the second and second inclined surfaces 64b, and the locking jaw portion 66 are sequentially provided; A first recess 73 is formed in the socket 70 between the first-circular expansion portion 62 and the second-circular expansion portion 64 by swaging caused by compression. Hydraulic hose, pipe, for the steering device of the vehicle, characterized in that the second groove portion 75 is formed between the second circular expansion portion 64 and the locking jaw 66 of the outer surface of the socket 70 And socket assemblies.

 Hydraulic Hose, Pipe, Socket

Description

Hydraulic Hose, Pipe, and Socket Assembly for Automobile Power Steering}

The present invention relates to a hydraulic hose, a pipe, and a socket assembly for a steering device of an automobile, and more specifically, the circular pipe parts 62 and 64 and the locking jaw part 66 are formed of a single metal pipe 60 and , And is formed by a drawing process so that the through hole 71 is provided at the side cross section, and the through hole 71 passes through the circular expansion parts 62 and 64 to be caught by the locking jaw 66. A hydraulic hose, a pipe, and a socket configured to include a socket 70 inserted into the socket, and a hydraulic hose 50 partially inserted into a space formed between an outer surface of the pipe 60 and an inner surface of the socket 70. It relates to a conjugate.

In general, the hydraulic hose for the steering device of the vehicle is to assist the steering force by supplying the oil supplied from the hydraulic pump to the left or right of the hydraulic gear or the hydraulic cylinder through a rotary valve provided on the steering shaft.

In such a hydraulic device for a vehicle steering device, a metal pipe and a hydraulic hose are used to connect the hydraulic pressure supplied from the pump to the cylinder, and in some cases, the hydraulic mechanism must be effectively connected.

As described above, the conventional embodiments of the present invention for connecting the hydraulic hose to the metal pipe have been disclosed in detail through Utility Model Registration No. 20316 (Publication No. 1999-011676) dated October 23, 1998.

1 is a cross-sectional view showing the configuration of a conventional hydraulic hose and pipe connection structure of the steering apparatus of a vehicle, Figure 2 is an exploded cross-sectional view illustrating a conventional hydraulic hose and pipe connection structure before the swaging of Figure 1, Figure 3 is a conventional Fig. 4 is a partial cutaway sectional view showing a socket disclosed in Utility Model Application No. 98-20316 (Product A), Fig. 4 is a partial cutaway sectional view of a socket of a conventional third-party B product, and Fig. 5 is a partial cut of a pipe of a conventional third-party B product. It is a cross section.

With reference to Figures 1 and 2 with respect to the connection structure of the hydraulic hose and the pipe for the steering apparatus of the conventional vehicle disclosed in the above specification as follows.

Referring to Figure 1, Figure 1 is a cross-sectional view showing the configuration of the conventional hydraulic hose and pipe connection structure of the steering apparatus of the vehicle, Figure 2 is an exploded cross-sectional view illustrating a hydraulic hose in a conventional metal pipe, the pipe (2) At the same time, the circular expansion portion 21 and the locking jaw 22 are simultaneously formed in one bending process in the molding machine, and the circular expansion portion 21 has the expanded diameter D3 slightly larger than the diameter D1 of the pipe. The diameter D2 of the locking jaw 22 is larger than the diameter D3 of the circular expansion portion 21.

In addition, the socket (3) after the draw processing to the cup-like, to form a through hole 31 in the bottom, the diameter (D4) of the through hole 31 is equal to the diameter (D3) of the circular expansion portion 21 The diameter D4 of the through hole 31 is a plus tolerance, and the diameter D3 of the circular expansion portion 21 is to be assembled with a minus tolerance.

In the assembly process of the present invention configured as described above, as can be seen in Figure 2, the socket 3 is inserted from the end of the pipe 2, the through hole 31 of the socket 3 is a circular expansion portion 21 Push the hook so as to hang on the locking jaw (22).

After inserting the end of the hydraulic hose (1) between the pipe (2) and the socket 3 in such a state, and swaging the outer diameter of the socket (3) as shown in Figure 1 21) Since at least two places of both sides are compressed, the hydraulic hose 1 is pressed in a zigzag manner so that the hose does not come off.

The connection structure of the hydraulic hose for the steering device of the conventional vehicle and the pipe configured as described above can simultaneously form the circular expansion portion 21 and the locking jaw 22 in one press process, and additional restraining means is required. It is excellent in assembly performance, especially because it does not cut, weld, plating, etc., so the production process is omitted a lot, and the cost is reduced, and productivity is improved. We found that there was a relatively falling problem.

 Test Items  Test standard / condition  Utility Model Registration No. 98-20316  Other conventional products Burst Pressure Test More than 408㎏ / ㎠ 700㎏ / ㎠ 700 Kgf  Bracket tensile test  4,800N or more / 490Kgf or more  More than 650Kgf  1,100 Kgf or more Thermal Aging Test More than 70 hours at 120 ℃ No Leak / No Creak No Leak / No Creak Low temperature test 24 hours at -40 ℃ No Leak / No Creak No Leak / No Creak  Endurance test  225,000 Cycle No Leak / No Creak  500,000 Cycle No Leak / No Creak  500,000 Cycle No Leak / No Creak

Rather than the burst pressure test, thermal aging test, and low temperature test of Table 1, the tensile test and endurance (repeated pressure) test are directly related to this development.

In order to explain Table 1 more clearly, the product of Utility Model Registration No. 98-20316 filed in the above table is called "A product", and the conventional products of other companies are called "B product". In Table 1, both A and B products meet the standard conditions, but it can be seen that A product has a relatively lower pulley tension than B product.

The product A has the structure of the socket 3 as shown in FIG. 3, and the product B has the structure of the socket 3 as shown in FIG. As the processing method of each socket, A product is manufactured by the process of plating after press working, and B product is manufactured through the process of internal cutting plating after forging processing. In addition, as the structure of the pipe 2, the product A has the structure as shown in FIG. 2, and the product B has the structure of FIG. In the manufacturing process of each of these pipes, the pipe of A product is manufactured by one molding, while the pipe of B product is manufactured by cutting, screwing and plating after forging. As a process for connecting the respective sockets (3), the pipe (2) and the hydraulic hose (1) as described above, A product is cut and molded pipe, the hose is inserted into the socket, the hydraulic hose (1), the socket (3) ) And the pipe 2 are simultaneously pressed by a press. B product is produced by pressing the socket (3) with a press after processing the stem, inserting a hydraulic hose into the socket and pressing the hydraulic hose with a press.

As described above, the A product has a simple manufacturing process, a very low manufacturing cost, and an excellent workability. However, as described above, the tool tension (or tensile strength limit) is relatively lowered. However, the B product is complicated and the manufacturing process is expensive and workability is deteriorated, but the quality is excellent.

The object of the present invention is to solve the problems of the prior art, and to configure a double-layered circular expansion to increase the bracket tension (limit tension) than the prior art, and to minimize the damage (damage) to the hose during swaging (swaging) Hydraulic hoses, pipes, and socket joints for steering systems of automobiles that have increased durability against high temperatures (more than 150 ° C) and high pressures (periodic fluctuation pressures from 120kgf / cm2 to 140kgf / cm2) than prior art temperature and pressure conditions To provide.

Hydraulic hose, pipe, and socket combination for the steering device of the vehicle according to the present invention,

The circular expansion portions 62 and 64 and the locking jaw portion 66 are formed by a draw process such that the metal pipe 60 is formed in one molding and the through holes 71 are provided at the side cross sections, and the through holes 71 are provided. The socket 70 is inserted into the pipe 60 to pass through the circular expansion portions 62 and 64 and is caught by the locking projection 66, and a part of the outer surface of the pipe 60 and the socket 70 It is configured to include a hydraulic hose 50 is inserted into the space formed between the inner surface of the;

The metal pipe 60 has, from its distal end, a first-round inclined portion 62 formed by a first-rising slope 62a and a first-fall slope 62b, and a second-rise slope 64a. And a second circular expansion portion 64 formed by the second and second inclined surfaces 64b, and the locking jaw portion 66 are sequentially provided;

A first recess 73 is formed in the socket 70 between the first-circular expansion portion 62 and the second-circular expansion portion 64 by swaging caused by compression. A second recess 75 is formed between the second circular expansion portion 64 and the locking jaw 66 among the outer surfaces of the socket 70.

According to the present invention, the problem of the prior art is solved, and, in general, when the product is made using a hose that is supplied to the market, the problem of not meeting the conditions of high temperature and high pressure is solved, and by forming a double-layered circular expansion part Higher tension (limit tensile force) than the prior art, and minimizing damage to the hose during swaging (high temperature (Oil temperature 150 ℃ or more) and high pressure (120kgf / ㎠ ~ 140kgf / /) than the prior art There is provided a hydraulic hose, pipe, and socket assembly for a steering apparatus of an automobile, which increases the durability against a periodic fluctuation pressure of 2 cm 2.

Hereinafter, a hydraulic hose, a pipe, and a socket assembly for a steering apparatus of a vehicle according to the present invention will be described in detail according to the embodiment shown in the accompanying drawings.

6 is a cross-sectional view of the hydraulic hose, pipe, and socket assembly for the steering apparatus of the vehicle according to an embodiment of the present invention, Figure 7 is a partial cutaway cross-sectional view of Figure 6, Figure 8 is a steering of the vehicle before swaging (compression) 9 is an exploded cross-sectional view of a hydraulic hose, a pipe, and a socket assembly for a device, and FIG. 9 illustrates an inner surface region W3 and a second lower sloped surface W4 of a socket having a second recess, according to a second embodiment of the present invention. Detailed magnification showing the case where) overlap with each other.

Hydraulic hose, pipe, and socket combination for the steering device of the vehicle according to the present invention is a metal pipe 60, the circular expansion portion (62, 64) and the locking jaw portion 66 is formed in one molding and through the side surface A socket is inserted into the pipe 60 so that the through hole 71 passes through the circular expansion portions 62 and 64 so as to be caught by the locking jaw 66. 70, and a hydraulic hose 50 is inserted into the space formed between the outer surface of the pipe 60 and the inner surface of the socket 70.

In addition, the metal pipe 60 has the first-round inclined portion 62 formed by the first-rising slope 62a and the first-fall slope 62b and the second-rise slope 64a from the end thereof. ) And the second circular expansion portion 64 formed by the second inclined surface 64b, and the locking jaw portion 66 are sequentially provided.

In addition, the present invention, the first groove portion 73 between the first-circular expansion portion 62 and the second-circular expansion portion 64 in the socket 70 by swaging accompanying compression. Is formed, and a second groove portion 75 is formed between the second circular expansion portion 64 and the locking jaw 66 among the outer surfaces of the socket 70.

Two circular expansion parts are formed and the damage of the hose is reduced, thereby increasing the limit of the tensile strength and durability. This will be described later.

In the hydraulic hose, pipe, and socket assembly for a steering apparatus of a vehicle according to the present invention, the inclination angle of the second falling slope 64b is greater than the effective inclination angle of the first falling slope 62b, and thus the second falling. It is preferable that the inclined surface 64b is formed to be steeper than the first-falling slope 62b.

As a result of numerous repetitive experiments, it was found that the test result showed that the limit of the tensile strength increased and the durability increased at high temperature and high pressure when this shape was taken.

In other words, the first-circular expansion portion 62 is formed in a smooth curve, and the second-circular expansion portion 64 is formed in a steep shape. The reason for the increase in durability is the soft first-circular expansion portion 62. To prevent the high temperature and high pressure oil in which the oil fluctuates from flowing into the second circular expansion portion 64, and the variable force of the high temperature and high pressure oil is in contact with the second circular expansion portion 64 and the hydraulic hose 50. Because of this, very little transmission is made. Therefore, even if minute damage to the hydraulic hose 50 is inevitable due to the sudden inclination of the second circular expansion portion 64, the fluctuation force of the oil is transmitted to the portion and is not torn. As a result, durability against high temperature and high pressure is considered to increase.

The main reason for the increase in the metal pulling force is that the force holding the hydraulic hose on the second-falling slope 64b of the second-circular expansion portion 64 increases compared to the prior art.

Thus, according to the present invention, the first-circular expansion portion 62 is a smooth circular expansion portion to block the inflow of oil, and the second-circular expansion portion 64 is relatively sharp and angular in comparison with the first-circular expansion portion. When the expansion force is strengthened by the expansion part, the problem of oil leakage and rupture caused by damage of the rubber crimping part due to high temperature and high pressure oil is solved.

In other words, the damage of the hydraulic hose in contact with the sudden and angular circular expansion part during swaging in the durability test for blocking the inflow of oil by the first-circular expansion 62 part and testing the resistance to the fluctuation pressure of the high temperature oil. It is to solve the problem that the oil of variable pressure penetrates the part and the part is torn and durability is weakened.

In the hydraulic hose, pipe, and socket assembly for a steering apparatus of a vehicle according to the present invention, it is preferable that the width W1 of the first recess 73 is greater than the width W2 of the second recess 75. . The test results showed that the tensile resistance and durability were excellent in this case. When the width W2 of the second recess portion 75 is small and the width W1 of the first recess portion 73 is large, the function of preventing oil penetration increases. And the bite seems to increase.

As for the second-round inclined portion 64, the inclination angle of the second-rising slope 64a is smaller than the inclination angle of the second-falling slope 64b, so the second-rising slope 64a is the second-falling slope ( 64b) is formed more slowly. The sudden inclination of the second falling slope 64b improves the grip of the hydraulic hose 50 to increase the tensile force limit, and the gently formed second rising slope 64a is squeezed by the squeezing hydraulic hose ( 50) can reduce local damage to

As shown in FIG. 8, in the hydraulic hose, pipe, and socket assembly for a steering apparatus of a vehicle according to the present invention, the inner surface area W3 of the socket 70 in which the second recess 75 is formed, and the The region W4 on which the second-falling slope 64b is formed is formed to have a region W5 overlapping each other, so that the region 52 constricted to the hydraulic hose 50 located at the second circular expansion portion 64 portion. ) Is preferably formed. Test results showed that the tensile resistance increased in this case.

Table 2 below is a table showing the performance of the hydraulic hose, pipe, and socket assembly for the steering device of the vehicle according to an embodiment of the present invention shown in Figure 6 and the comparative test results of the product according to the prior art.

  Test Items   Test standard (condition)  Test result of this invention  Utility Model Registration No. 98-20316 (A Product)   Japanese specification (B products)  Burst Pressure Test  40 MPa (407.8 Kgf / ㎠) or more GM SPEC. (GME 7060)   700㎏ / ㎠   700㎏ / ㎠   700㎏ / ㎠  Jingu seal  4800N (490Kgf) or more GM SPEC. (GME 7060)  More than 650Kgf  More than 650Kgf  1,000 Kgf or more  Thermal Aging Test -Rubber Hose Performance  120 ℃ * 70Hr  No Creak No Leak  No Creak No Leak  No Creak No Leak  Low temperature test-rubber hose performance  -40 ℃ * 24Hr  No Creak No Leak  No Creak No Leak  No Creak No Leak     High temperature shock durability test-Complex performance of assembly  PRESSURE; Difference between vehicles (Average 87 ~ 110bar) Experience Cycle /: 30 ~ 40 CPM OIL TEMP.105 ° C CHAMBER TEMP.120 ° C; 225,000 CYCLE NO LEAK, NO CRACK  PRESSURE; 140 bar OIL TEMP. 150 degrees CHAMBER TEMP. 150 degrees C; 400,000 CYCLE NO LEAK, NO CRACK  PRESSURE; 110bar OIL TEMP. 105 ° C CHAMBER TEMP. 120 degrees C; 225,000 CYCLE NO LEAK, NO CRACK     No data present

As shown in Table 2, at present, most domestic and foreign automobile companies have oil temperature 105 ℃, fluctuation pressure 110bar (cycle: 30 ~ 40 CPM) and limit cycle 225,000 for durability against fluctuation pressure. Automakers are attempting to increase oil temperature and fluctuating pressure on certain models. In this case, it was developed to meet the needs of these automakers.

As shown in Table 2, in the present invention, an increase in durability was confirmed by experiments by showing a limit cycle of 400,000 limit cycles under an oil temperature of 150 ° C. and a variable pressure of 140 bar (cycle: 30 to 40 CPM). . Our conventional A product (company name change) has a limit cycle of 225,000 under cycle conditions of oil temperature 105 ℃ and fluctuation pressure 110bar (cycle: 30 ~ 40 CPM).

Although the present invention has been described with reference to the above-mentioned preferred embodiments, the scope of the present invention is not limited to these embodiments, the scope of the present invention is defined by the claims below and equivalent scope of the present invention It will include various modifications and variations belonging to.

The reference numerals described in the utility model registration claims below are merely to aid the understanding of the design and do not affect the interpretation of the scope of rights, and the scope of rights shall not be construed narrowly by the reference numerals described.

50: hydraulic hose 52: concave area

60 pipe 62 first circular expansion portion

62a: 1st-elevation slope 62b: 1st-elevation slope

64: 2nd circular expansion part 64a: 2nd rising slope

64b: second falling slope 66: locking jaw

70: socket 71: through hole

73: first groove portion 75: second groove portion

W1: Outer width of the first groove socket W2: Outer width of the second groove socket

W3: inner surface region of the socket 70 in which the second recess 75 is formed

W4: Area where the second falling slope is formed W5: Area where W3 and W4 overlap

<Description of the symbols for the main parts of the drawings>

1 is a cross-sectional view showing the configuration of a hydraulic hose and pipe connection structure for a steering apparatus of a conventional vehicle.

Figure 2 is an exploded cross-sectional view illustrating a conventional hydraulic hose and pipe connection structure before the swaging of Figure 1;

3 is a partial cutaway cross-sectional view showing a socket disclosed in the conventional Utility Model Registration Application No. 98-20316 (Product A).

Figure 4 is a partial cutaway cross-sectional view of a conventional third-party B product socket.

Figure 5 is a partial cross-sectional view of the conventional third-party B products.

6 is a cross-sectional view of a hydraulic hose, a pipe, and a socket assembly for a steering apparatus of a vehicle according to an embodiment of the present invention.

7 is a partial cutaway sectional view of FIG. 6.

8 is an exploded cross-sectional view of a hydraulic hose, pipe, and socket assembly for a steering device of a vehicle before swaging;

FIG. 9 is a detailed enlarged view illustrating a case in which an inner surface region W3 of a socket in which a second recess is formed and a region W4 in which a second descending slope is formed overlap each other according to a second embodiment of the present invention.

Claims (5)

delete In a hydraulic hose, a pipe, and a socket assembly for a steering device of an automobile, The circular expansion portions 62 and 64 and the locking jaw portion 66 are formed by a draw process such that the metal pipe 60 is formed in one molding and the through holes 71 are provided at the side cross sections, and the through holes 71 are provided. The socket 70 is inserted into the pipe 60 to pass through the circular expansion portions 62 and 64 and is caught by the locking projection 66, and a part of the outer surface of the pipe 60 and the socket 70 It is configured to include a hydraulic hose 50 is inserted into the space formed between the inner surface of the; The metal pipe 60 has a first-round inclined portion 62 formed by a first-rising slope 62a and a first-fall slope 62b and a second-rise slope 64a from the end thereof. And a second circular expansion portion 64 formed by the second and second inclined surfaces 64b, and the locking jaw portion 66 are sequentially provided; A first recess 73 is formed in the socket 70 between the first-circular expansion portion 62 and the second-circular expansion portion 64 by swaging caused by compression. A second recess portion 75 is formed between the second circular expansion portion 64 and the locking jaw 66 among the outer surfaces of the socket 70; The inclination angle of the second-falling slope 64b is greater than the effective inclination angle of the first-falling slope 62b so that the second-falling slope 64b is steeper than the first-falling slope 62b. A hydraulic hose, a pipe, and a socket assembly for a steering apparatus of an automobile. The method of claim 2, The width W1 of the first recess portion 73 is greater than the width W2 of the second recess portion 75. A hydraulic hose, pipe, and socket assembly for a steering apparatus of an automobile. The method of claim 3, In the second circular expansion portion 64, the inclination angle of the second inclination slope 64a is smaller than the inclination angle of the second inclined slope 64b, so that the second inclined slope 64a is the second inclined slope. Is formed more slowly than (64b), Sudden inclination of the second falling slope 64b improves the grip of the hydraulic hose 50 to increase the tensile force limit, and the gently formed second rising slope 64a is a hydraulic hose (when swaging) 50. A hydraulic hose, pipe, and socket combination for steering of a motor vehicle characterized in that it reduces local damage to the vehicle. The method of claim 4, wherein   The inner surface area W3 of the socket 70 in which the second recess 75 is formed and the area W4 in which the second-down slope 64b is formed are formed to have an overlapping area W5. A hydraulic hose, a pipe, and a socket assembly for a steering apparatus of a vehicle, characterized in that a constricted area 52 is formed in a hydraulic hose 50 located at a portion of a second circular expansion portion 64.

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