JP2518794B2 - Hollow body with partition wall and manufacturing method thereof - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to means for creating a plurality of passages within an elongated hollow body such as a tube or hollow shaft.

[0002]

2. Description of the Related Art As means for forming a plurality of passages in tube or shaft, which drilled a plurality of holes b in the gun drill in axis a as shown in FIG. 11, in tube c as shown in FIG. 12 In flat
Which press-fitting the Rana partition plate d (JP 63-57805), FIG.
As shown in FIG. 13, there is known one in which an inner tube e having a recess is press-fitted in a tube body c (Japanese Patent Laid-Open No. 4-134104).

However, in the case of a long product, the product of FIG. 11 is difficult and expensive, and in the case of FIG. 12 , a partition plate d.
'S contact surfaces of the inner surface of the side edge and the tube c, be sealed over the entire length of the long hollow body is difficult, that of Figure 13,
When the opening f is provided on the side surface to communicate the inside of the inner pipe e with the outside, the two pipes c and e communicate with each other at the gap f1 between the two pipes c and e. The fluid easily leaks into the tube c, and it is not easy to provide a means for preventing the fluid from leaking.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a means for easily providing a partition wall inside a hollow body that does not leak between a plurality of passages.

[0005]

Among the means for solving the above problems in the present invention, the first structural means is, as described in claim 1, a partition wall having a bent portion in its cross section, which is hollow. The partition wall is pressed into the body while retaining the resilience, and both side edges of the partition wall are pressed against the inner surface of the hollow body to form a hollow body and both side edges.
Form a valley on the same side with respect to the partition wall, and both sides of the partition wall
The edge portion is brazed to the inner surface of the hollow body at the valley side .

[0006] Similarly, the second means is, as described in claim 2, in claim 1, at least at the end of the hollow body.
A space with a longitudinal fixed groove and a curved cross section.
Insert the wall into the hollow body and fit a part of the partition into the fixing groove
Characterized in that it was.

The first means for solving the problem in the manufacturing method is, as described in claim 3 , a partition wall having a bent portion in its cross section is press-fitted into the hollow body while retaining elastic force, Both
The side edge and the hollow body form a valley on the same side with respect to the partition wall.
As shown in FIG.
Place the wire-shaped metal brazing material with the part facing upward, and
At least the vicinity of the valley is heated to a brazing temperature or higher .

Similarly, as a second solution means, as described in claim 4 , both side edges of the partition wall and the hollow body are provided with respect to the partition wall.
Bends in the cross section so that valleys are formed on the same side.
Insert the partition wall into the hollow body and turn the valley upward.
Place a wire-shaped metal brazing material on at least the valley
It is characterized in that the neighborhood is heated to the brazing temperature or higher .

[0009]

According to the means of the above-mentioned claim 1, the side edge portion of the partition wall is formed by the elastic force and stretchability generated in the curved portion of the partition wall.
Pressed against and conform to the inner surface of the hollow body, the positioning is made,
Liquid leakage is prevented by the brazing part provided in the valley .

According to the means of claim 2, the hollow body is provided.
The fixing groove secures the partition in an accurate position with respect to the hollow body.
Is determined.

[0011] According to the measures of claim 3 and 4, septum wall and placed in the valley portion formed on the inner surface of the hollow body metal wax,
It melted by heating valley portion as well guided in the valley portion or <br/> et contacting surface spreads on the entire contact surface by capillary action, once
Complete brazing is done by heating .

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment, in which a hollow shaft 1 is used, for example, as a rocker arm shaft of a valve opening control type engine, and has dimensions of an outer diameter of 20 mm, an inner diameter of 12 mm and a length of 340 mm, and a partition wall. In the two passages divided by 2,
Hydraulic pressures of different systems are supplied, and the outlet 1 is bored in the pipe.
The oil pressure flows out from a and the hydraulic pressure is distributed to the required portions.

The partition wall 2 is made of a plate material having an elastic force, for example, a steel plate, has the same length as the hollow shaft 1, and is bent into a chevron cross section. The width of the partition wall 2 is made slightly wider than the inner diameter of the hollow shaft 1, and when the partition wall 2 is press-fitted into the hollow shaft 1, the side edges 2a, 2a are elastically deformed at the bent portions so that the side edges 2a, 2a are hollow.
It is pressed against the inner surface of the oil to block the oil flow, forming two independent passages.

The inner surface of the hollow shaft 1 and the contact surface of the side edge portion 2a of the partition wall 2 can be kept oil-tight by press-contacting as described above. Alternatively, a joining means such as bonding with an adhesive can be used, and if the above-mentioned pressure welding and the joining means are used together, processing at the time of joining becomes easy.

The second embodiment of FIG. 2 is to braze the side edge portion 2a of the partition wall 2 which is bent into a chevron cross section.
As shown in FIG. 2 (a), the partition wall 2 is provided with side edges 2a, 2
When the hollow shaft 1 is inserted with a facing downward, both side edges 2a
And the inner surface of the hollow shaft 1 are respectively formed with upward valleys 3. As shown in Fig. 2 (b), the wire-shaped metal brazing material 4 is placed on the valley 3 and heated above the brazing temperature in a heating furnace or high-frequency heating device, or when heated from outside with a burner, the brazing material 4 is melted and hollow shaft 1 and side edge 2 at the bottom of valley 3
It flows between the contact surfaces of a and spreads over the entire contact surfaces due to a capillary phenomenon. When this work is naturally cooled, the metal brazing material 4 is solidified and the brazing portion 4a is formed as shown in FIG. 2 (c) and completely brazed to form two oil passages 5 and 6.

Next, in the third embodiment of FIG. 3, the partition wall 7 is
Only the side edge portions 7a on both sides are curved to have a trapezoidal shape, and the brazing portion 4a is formed on the bottom of the upward valley portion 3 as in the second embodiment.

[0017] The fourth actual施例in Figure 4, the two chevron 8b is formed saddle 8a and on both sides in the partition wall 8, the metal brazing material is placed on the outside of the valley of該山shaped 8b, heating, cooling Thus, the brazing part 4a is formed. In this embodiment, the oil passage 5 on the saddle portion 8a can be made larger than the oil passage 6 below.

In the fifth embodiment shown in FIG. 5, a step 9b and an inclined portion 9c are provided on both sides of the central mountain 9a of the partition wall 9, and the outside of the inclined portion 9c is a brazing portion 4a. In this embodiment, the oil passage 6 is made larger than the oil passage 5.

In the sixth embodiment shown in FIG. 6, two fixing grooves 10 in the longitudinal direction are formed on the inner surface of the hollow shaft 1, and both side edge portions 11a of a substantially trapezoidal partition wall 11 are fitted therein. , The valley above it is brazed. In this example,
Since both side edges 11a are held by the fixing groove 10, the bonding strength is high.

Among the above-mentioned respective embodiments, those in which the connecting point between the partition wall and the hole surface is on a substantially diameter line like the embodiment of FIGS.
If the partition wall is made to have a width that is compressed and elastically generated when the partition wall is inserted, and the partition wall is forcibly inserted or press-fitted, a retaining action occurs and the partition wall does not shift during the work, and there is no gap in the brazing part. Also has the advantage of becoming smaller.

In the seventh embodiment of FIG. 7 , four oil passages are formed. Two trapezoidal partition walls 15 and 16 are assembled as shown in FIG. Brazing the valleys of the brazing material with the brazing filler metals 17C ₁ and 17C ₂ 17C ₃ , and then setting the arrow D upwards
Brazing with D ₁ and 17D ₂ .

Although an example of partitioning the inside of the hollow shaft has been described above, it can be carried out under the same conditions even for a pipe dedicated to fluid transportation.

Next, FIGS. 8 and 9 show an example in which the hollow shaft 1 similar to the third embodiment is used as a rocker shaft 19 in a two-valve type valve opening control engine, and the oil passage 5 has a hole 20. The oil passage 6 is opened to the outer surface at the concave portion 21, and the oil passage 6 is
It is open to the outside.

The rocker shaft 19 has a first rocker arm 2
4, the second rocker arm 25, and the third rocker arm 26 are rotatably fitted, the third rocker arm 26 is associated with one intake valve 27 of one cylinder of the engine , and the second rocker arm 25 is the same. It is associated with the other intake valve of the cylinder.

Pistons 24a and 26a and a spring device 25a are provided in a cylinder provided in one of the rocker arms 24 to 26, and a piston 26 is provided in a cylinder provided in the other of the rocker arms 25 and 26.
b and a spring device 25b are provided.

The cam shaft 28 has a cam 2 of different height and shape.
9, 30, and 31 are provided, and the first rocker arm 24 and the cam 29, the second rocker arm 25 and the cam 30, and the third rocker arm 26 and the cam 31 are in contact with each other via slippers, respectively.

When the hydraulic pressure is not supplied to the cylinder of each rocker arm, each piston is in the position shown in FIG. 8 , the second rocker arm 25 swings by the cam 30, and the third rocker arm 26 swings by the cam 31. A small swinging motion is performed according to the height of the cams 30 and 31, and a small valve opening motion is performed.

Next, from the oil passage 5 through the hole 20, the piston 26
When hydraulic pressure acts on the right side of b, the piston 26b moves leftward and the left part enters the cylinder of the second rocker arm 25,
The third rocker arm 26 and the second rocker arm 25 are integrated, and the higher cam 30 opens and closes the two intake valves.

Further, from the oil passage 6 through the hole 22, the piston 2
When hydraulic pressure acts on the right side of 6a, the pistons 26a, 24
a goes to the left, and the left part of the piston 24a enters into the cylinder of the second rocker arm 25, and the piston 26a
The left part of the arrow enters the cylinder of the first rocker arm 24. Therefore, the rocker arms 24, 25 and 26 are integrated and driven by the cam 29 having the maximum lift, and the two intake valves perform the maximum opening / closing action.

In this mode of use, since the partition wall 8 of the rocker shaft 19 is brazed on both side edges, oil leakage does not occur and the switching operation can be performed reliably.

Next, the eighth embodiment shown in FIG. 10 facilitates the positioning of the partition 33 with respect to the hollow shaft 1. One end of the partition 33 has a pair of ears 34 shown in FIG. 10 (c).
Projecting a pair of fixing grooves 35 shown in FIG. 10 (b) to one end of the hollow shaft 1 is provided, engaging the ear portion 34 into the fixing groove 35 by inserting the partition wall 33 from the other end to a hollow shaft 11 To combine. This engagement prevents the partition 33 from being displaced in the rotational direction.

[0032]

As is apparent from the above description, the claims
According to the means of 1 and 2, the cross section of the partition wall that partitions the hollow body
The bending portion from provided, can be inserted while holding the elastic force of the partition wall to the hollow body, it is the positioning, side edges close contact by adapting to the inner surface of the hollow body, the
The side edges and the valley formed on the inner surface of the hollow body are brazed
Therefore, high airtightness can be achieved by using a small amount of brazing filler metal.
Two passages with are formed.

According to the third and fourth aspects of the present invention, the metal is made such that the valley formed between the partition wall and the inner surface of the hollow body faces upward.
Placing the brazing material, by heating at least the valleys near, since Ru can flow starts selling metal filter to the contact portion of the side edges and the hollow inner surface is easy to braze, once
It is possible to braze by heating. Also in the hollow body
After inserting the partition wall and brazing material into the hollow part,
High rigidity like rocker arm axis
It is a hollow body with a small diameter in order to have
Also, simply having only a complete fixation and advantages vapor tightness can be easily obtained and heated.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment.

FIG. 2 is a process drawing of the second embodiment.

FIG. 3 is a front view of the third embodiment.

FIG. 4 is a front view of the fourth embodiment.

FIG. 5 is a front view of the fifth embodiment.

FIG. 6 is a front view of the sixth embodiment.

FIG. 7 is a front view of the seventh embodiment.

FIG. 8 is a sectional view taken along line 8-8 of FIG. 8 showing an example of use of the finished product.

[FIG. 9] Partial vertical sectional view of the same as above.

FIG. 10A is a completed product of an eighth embodiment, and FIGS.
Single item view

FIG. 11 is a perspective view of a conventional example.

FIG. 12 is a perspective view of a conventional example.

FIG. 13 is a perspective view of a conventional example.

[Explanation of symbols]

1 Hollow shaft 2, 8, 9, 11, 12, 15, 1
6 Partition 2a Side edge
3 Valley 4 Metal brazing material 4
a brazed portion 10 clamping groove _{17C 1 ~ 3, 17D 1 ~} 2 brazing metal

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-61-274192 (JP, A) JP-A-51-67244 (JP, A) JP-A-4-187955 (JP, A) Actual development Sho-60- 37686 (JP, U) Actual opening 57-67179 (JP, U) Actual opening 60-58985 (JP, U)

Claims (4)

(57) [Claims] 1. A partition wall having a curved cross section is press-fitted into the hollow body while retaining elastic force, and both side edges of the partition wall are in pressure contact with the inner surface of the hollow body, and the both side edges are hollow. The body and the partition
A valley is formed on the same side with respect to both sides of the partition.
A hollow body with a partition, characterized in that it is brazed to the inner surface of the hollow body on the trough side . 2. The hollow body according to claim 1,
A longitudinal fixing groove is provided at the end, and a bend is provided in the cross section.
Insert the partition wall into the hollow body, and partially attach the partition wall to the fixing groove.
A hollow body with a partition, characterized by being fitted to . 3. A partition wall having a bent portion in a cross section is hollow.
It is pressed into the body with elastic force, and it is not
So that the cavities form a valley on the same side of the partition
The both edges are pressed against the inner surface of the hollow body, and the valley is turned upward.
Place the wire-shaped metal brazing material on the
A method for producing a hollow body with a partition, characterized in that the vicinity of the portion is heated to a brazing temperature or higher . 4. The both side edges of the partition wall and the hollow body are opposed to the partition wall.
And bend the cross section to form a valley on the same side.
Insert the partition wall provided in the hollow body, the valley portion upward
And place a wire-shaped metal brazing material on at least the valley
A method for producing a hollow body with a partition, characterized in that the vicinity of is heated above the brazing temperature .