KR101930027B1 - Imporved Oil Ring Lapping Machine for Car Engine Piston - Google Patents

Abstract

The present invention relates to an improved lapping machine for an oil ring of an engine piston of a vehicle, capable of easily adjusting the outer diameter of the oil ring. According to the present invention, the improved lapping machine for an oil ring of an engine piston of a vehicle comprises: a main body (10) including a first air inlet path (11) mounted on a vertically elevated main shaft (1) and lengthily formed from an upper part to a lower part, and a first air discharge path (12) communicating with the first air inlet path (11) and penetrating an outer circumferential surface; a first expansion tube (20) coupled to the main body (10) to include the first air discharge path (12) of the main body (10), having an opened inner part to receive air discharged from the first air discharge path (12), formed in a circular shape, and expanded by the air discharged from the first air discharge path (12); a plurality of divided jaws (30), wherein a plurality of arced plates forming a predetermined angle in a radial shape form a cylindrical shape, the inner circumference of each arced plate comes in contact with the outer circumference of the first expansion tube (20), and each arced plate is opened to each other and moved to the outside when the first expansion tube (20) is expanded; and an expansion rubber (40) allowing an inner circumference to come in contact with the outer circumference of the divided jaw (30), allowing each arced plate to be opened and expanded to come in contact with the inner circumference of the oil ring (2) so as to fix the oil ring (2) in expansion of the first expansion tube (20), and returned to an original position in contraction of the first expansion tube to return the divided jaw (30) to an original position and be spaced apart from the inner circumference of the oil ring (2) so as to allow the oil ring (2) to be separated.

Description

Technical Field [0001] The present invention relates to an improved oil ring lapping apparatus for an automobile engine piston,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved oil ring lapping apparatus for an automobile engine piston, and more particularly, to an oil ring lapping apparatus for an automobile engine piston, which has an outer diameter of the oil ring for maintaining the tightness between the inner diameter of the cylinder liner and the outer diameter of the oil ring, And more particularly, to an improved oil ring lapping apparatus for an automobile engine piston that facilitates the process of attaching and detaching an oil ring to a lapping apparatus during precise lapping operation, thereby improving workability and productivity.

In order to keep the airtightness between the piston and the cylinder liner, two or three piston rings are usually mounted to keep the airtightness of the piston reciprocating in the cylinder chamber of the automobile engine. One or two oil rings are installed to evenly apply oil and scrape off excess oil.

A series of rings mounted on the piston are subjected to lapping so as to move accurately in close contact with the cylinder liner.

In this case, when the product subjected to the polishing process needs to be processed with more precision in dimensional precision, parallelism, and roughness, the processing is called lapping processing, and such a machine is called a lapping machine.

If such an oil ring is not precisely machined, the wear of the cylinder liner will be accelerated or scratches will occur, and if the oil leaks, the normal operation of the engine will be seriously affected.

However, in such a lapping process, each oil ring is inserted into the outer circumferential surface of a separate ring, and then moved up and down in a cylindrical sleeve to perform a lapping operation and then separate one by one. .

The reason for sandwiching each of these separate rings is that the tension of the oil ring is so weak that the lapping process can not be performed properly, so that it is necessary to obtain the tension necessary for the lapping process.

Korean Patent No. 10-1363063 (entitled " Oiling Lapping Device for Automobile Engine Piston ") filed by the present applicant and registered to solve these problems has been disclosed.

The automobile oiling lapping apparatus includes a through hole (12) vertically penetrating a main shaft (11) formed with a screw thread on an upper outer circumferential surface and vertically moving up and down vertically, (1) having a shoe insertion hole (13) penetrating the shoe (12) and having six radially spaced apart circumferential surfaces; A first tapered surface 21 inserted into the through hole 12 of the main body 1 and adjacent to an upper end of the shoe insertion hole 13 and having an outer diameter gradually increased and then reduced in a stepwise manner, And a second tapered surface (22) adjacent to a lower end of the second tapered surface (13), the outer diameter of the second tapered surface (22) gradually decreasing after the outer diameter is gradually increased. Six shoes 3 inserted into the shoe insertion holes 13 and provided with first and second inclined surfaces 31 and 32 at portions in close contact with the first and second tapered surfaces 21 and 22, ; Six split pieces (4) mounted on the opposite side of the shoe (3) inserted in the shoe insertion hole (13) to form a cylindrical shape together with those mounted on the adjacent shoe (3); A mounting hole 51 penetrating vertically is formed at the center and a cylindrical member made of the split piece 4 is inserted and a shrinking groove 52 extending vertically and vertically is formed on the outer surface of the rubber member 5 )Wow; Wherein the adjustment shaft 2 is supported by a lower end of the split piece 4 and the expanding rubber 5 so as to be engaged with a lower end thread of the adjustment shaft 2 so that the adjustment shaft 2 moves up and down relative to the main body 1 And a nut (6), and is configured to vertically reciprocate inside the cylindrical sleeve (7).

In the automobile oil ring lapping apparatus having the above-described configuration, when the shoe 3 is pushed outward by the upward movement of the adjustment shaft 2, each of the divided pieces 4 mounted on the shoe 3 is pushed out, When the piece 4 is pushed, the extended rubber 5 which is in contact with the split piece 4 and fitted in the oil ring is expanded to fix the oil ring.

The automobile oil ring lapping apparatus having the above-described structure can easily mount a plurality of oil rings and separate them after machining, so that the worker can work more easily and drastically reduce the time required for machining.

However, the adjustment of the outer diameter of the oil ring fixed to the expanded rubber 5 is controlled by the amount of lift of the adjustment shaft 2. This adjustment is performed by the rotation of the adjustment nut 6, It is not easy to adjust the lift amount of the vehicle.

Further, when performing the lapping operation by moving the oil ring fixed to the expanded rubber 5 up and down in a cylindrical sleeve, the expanded rubber 5 performs lapping while absorbing all impacts , The expanded rubber 5 has a large stiffness and can not increase the buffering action. Therefore, there is a problem that a machining error such as a roundness occurs during the lapping operation of the oil ring.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide an oil ring fixing apparatus for an internal combustion engine in which an adjustment nut is provided, So that it is possible to easily adjust the outer diameter of the oil ring wrapping device for an automobile engine piston.

In addition, an improved oil ring lapping apparatus for an automobile engine piston, which can reduce machining errors such as roundness when performing the lapping operation by moving the oil ring fixed to the expanded rubber 5 up and down in a cylindrical sleeve .

In order to achieve the above object, an improved oil ring lapping apparatus for an automobile engine piston of the present invention comprises a first air inflow path (11) mounted on a main shaft (1) vertically moving up and down, And a first air discharge path (12) communicating with the first air inflow path (11) and passing through the outer circumferential surface of the main body (10); The first air discharge path 12 is formed in a cylindrical shape and is opened to the inside so that the air discharged from the first air discharge path 12 is connected to the main body 10 so that the first air discharge path 12 of the main body 10 is included, A first expansion tube (20) extending by the air discharged from the first air discharge path (12); A plurality of arc plates having a predetermined radial shape are formed in a cylindrical shape, and a peripheral edge of each circular arc plate is in contact with an outer peripheral edge of the first extension tube 20, and when the first extension tube 20 is expanded, A plurality of split jaws 30 moved outwardly while flaring; The outer circumferential edge of each of the division jaws 30 abuts on the inner circumferential edge of the oil ring 2, and when the first expansion tube 20 expands, each arc plate expands to contact the inner circumferential edge of the oil ring 2, So that the split jaws 30 are returned to their original positions so as to be separated from the inner peripheral edge of the oil ring 2 to separate the oil ring 2 And an expandable rubber (40) for allowing the rubber (40).

The first air discharge path 12 is connected to the first air inflow path 11 and includes an upper air discharge path 12a formed in an upper portion of the main body 10, And a lower air discharge passage 12b formed in a lower portion of the main body 10 and communicating with the upper air discharge passage 12a, An upper expansion tube 21 extending by air and a lower expansion tube 22 extending by air discharged from the lower air discharge passage 12b.

An upper stopper portion (not shown) which is fixed to the upper portion of the main shaft 1 and is in contact with the uppermost oil ring 2 to prevent the uppermost oil ring 2 from being separated from the upper portion of the expanded rubber 40 50); A lower stopper portion 60 provided to abut the lower end of the expanded rubber 40 and contacting the oil ring 2 positioned at the lowermost portion to prevent the oil ring 2 located at the lowermost portion from being released to the lower portion of the expanded rubber 40, Is further provided.

The lower end stopper portion 60 includes a second air inflow path 61 extending from the upper portion of the main body 10 to a lower portion of the expanded rubber 40; A second air discharge passage (62) formed in the main body (10) located under the expanded rubber (40) and communicating with the second air inlet passage (61) and penetrating through the outer peripheral surface; And is formed in a cylindrical shape so as to be opened to the inside so that the air discharged from the second air discharge path (62) is connected to the main body (10) so that the second air discharge path (62) A second expansion tube (63) extending by the air discharged from the second air discharge path (62); A plurality of circular arc plates having a radial shape at a predetermined angle are in a cylindrical shape and the peripheral edge of each circular arc plate is in contact with the outer periphery of the second expanding tube (63) When the second expansion tube 63 is extended, the respective circular arc plates are fanned out and moved outward so that the oil ring 2 is lowered from the lower end of the expansion rubber 40 to the lower side And a plurality of stoppers (64) for preventing the stoppers (64).

The improved oil ring lapping apparatus for an automobile engine piston according to the present invention as described above is different from the conventional apparatus in which the expansion rubber is expanded by adjusting the amount of lift of the adjustment shaft 2 by the adjustment nut 6, The expansion tube is expanded by the supply of the compressed air and the split jaw is moved outwardly so that the expansion rubber 5 is expanded so that the outer diameter of the oil ring fixed to the expansion rubber 5 can be easily controlled.

In addition, by supplying compressed air to the extension tube, the expansion ring is expanded by expanding the split jaw by expanding the split jaw. Thus, since the oil ring is fixed by the expansion jaw of the split jaw, Unlike the lapping apparatus of the present invention, since the buffering action is performed not only by the extension rubber but also by the extension tube, the double buffering action is performed, so that machining error such as roundness can be reduced and the processing accuracy can be further improved.

1 is a cross-sectional view showing an oil ring lapping apparatus for a conventional automobile engine piston.
2 is a cross-sectional view of an oil ring lapping device for an improved automotive engine piston of the present invention.
3 is an exploded perspective view showing a main part in an oil ring lapping apparatus for an improved automobile engine piston of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an improved oil ring lapping apparatus for an automobile engine piston of the present invention will be described in detail with reference to the drawings.

Fig. 2 is a cross-sectional view of an improved oil ring lapping device for an automobile engine piston of the present invention, and Fig. 3 is an exploded perspective view showing a main part in an oil ring lapping device for an improved automobile engine piston of the present invention.

An improved oil ring lapping apparatus for an automobile engine piston according to the present invention comprises: a body (10); A first extension tube (20); Division jaw 30; And an expanding rubber 40.

The main body 10 includes a first air inflow passage 11 which is mounted on the main shaft 1 which vertically descends and which is formed to be long from the upper side to the lower side and a second air inflow passage 11 communicating with the first air inflow passage 11, A first air discharge passage 12 is formed.

The air discharged to the first air discharge path (12) is moved along a cylindrical groove formed on the outer peripheral surface of the main body (10) to supply air to the first extension tube (20).

Air is supplied to the first air inflow portion 11 to expand the first expansion tube 20 by using a known air supply and discharge portion for supplying and discharging compressed air, And air is discharged from the first air inflow part 11 to shrink the second air inflow part 20.

"자로 된다. 상기 제 1 확장튜브(20)는 내측 중앙에 형성된 개구부를 통해 상기 제 1 공기배출로(12)로 배출되는 공기가 공급되어 확장되게 된다.The first expansion tube 20 is coupled to the main body 10 such that the first air discharge path 12 of the main body 10 is included and the air discharged from the first air discharge path 12 And is formed into a cylindrical shape and is expanded by the air discharged from the first air discharge path (12). The first extension tube (20) has an inner center opening, an open outer side is in close contact with the main body (10)

The first expansion tube 20 is expanded by supplying air discharged to the first air discharge path 12 through an opening formed in the center of the first expansion tube 20.

A tube fixing part 15 for fixing the first extension tube 20 to the main body 10 may be provided between the main body 10 and the first extension tube 20. The tube fixing part 15 is formed in a cylindrical shape and the tube fixing part 15 is provided with a tube fixing part 15 for fixing the tube fixing part 15 to the first expansion tube 20, An exhaust hole 15a is formed.

The partition jaw is formed by a plurality of arcuate circular plates formed at a predetermined angle in a radial direction and each having a cylindrical shape and the periphery of each arc plate is in contact with the outer periphery of the first extension tube 20, Each arc plate is moved outward while being widened to each other.

The expansion rubber 40 is extended to the inner periphery of the oil ring 2 in contact with the outer periphery of each of the division jaws 30, The split ring 30 is returned to its original position when the first extension tube 20 is retracted to retract the split ring 50 from the inner peripheral edge of the oil ring 2, So that the oil ring 2 can be separated.

A plurality of oil rings 2 are fixed to the extended rubber 40 so as to be in contact with one another in a row so that the fixed oil ring 2 moves up and down in a cylindrical sleeve to perform a lapping operation.

As described above, according to the present invention, air is supplied to the first expansion tube 20 to expand the division jaw 30, and the expansion rubber 40 is expanded by the expansion of the division jaw 30. As a result, Unlike the conventional lapping device which performs a damping action only by the extended rubber from the impact during the lapping operation, the damping action by the first extension tube 20 as well as the expansion rubber 40 is performed, The machining error such as the roundness can be reduced, and the machining accuracy can be further improved.

The first expansion tube 20 and the expansion rubber 40 are formed to be longer in order to increase the number of the oil rings 2 to be processed. When the first expansion tube 20 and the expansion rubber 40 are made longer, The pressure of the upper and lower portions of the extension tube 20 is reduced and a pressure difference between the upper and lower portions and the intermediate portion transmitted to the expanding rubber 40 is generated. In order to reduce this, the first expansion tube 20 is provided at the upper portion and the lower portion, respectively, so as to reduce the pressure difference.

The first air discharge passage 12 is composed of an upper air discharge passage 12a and a lower air discharge passage 12b and the first extension tube 20 is connected to the upper extension tube 21 , And a lower extension tube (22).

The upper air discharge passage 12a communicates with the first air inflow passage 11 and is formed at an upper portion of the main body 10. [

The lower air discharge passage 12b communicates with the first air inflow passage 11 and is formed at a lower portion of the main body 10. [

The upper expansion tube (21) is expanded by the air discharged from the upper air discharge path (12a).

The lower extension tube 22 is expanded by air discharged from the lower air discharge passage 12b.

The expansion ring 40 is expanded by the expansion of the first expansion tube 20 to fix the oil ring 2 to the expansion rubber 40. The oil ring 2 is fixed to the expansion rubber 40, The upper end stopper portion 50 and the lower end stopper portion 50 are formed so as to prevent the oil ring 2 from slipping in the vertical direction from the expanding rubber 40 when the lapping operation is performed in the cylindrical sleeve, 60 may be provided.

The upper stopper portion 50 is fixed to the upper portion of the main shaft 1 and is in contact with the uppermost oil ring 2 so that the uppermost oil ring 2 is separated from the upper portion of the expanded rubber 40 .

The lower end stopper portion 60 is provided so as to be in contact with the lower end of the expansion rubber 40 and is in contact with the oil ring 2 located at the lowermost portion so that the oil ring 2 located at the lowermost portion is detached to the lower portion of the expansion rubber 40 .

At this time, the oil ring 2 is positioned to fit the extended rubber 40 from the lower part of the expanded rubber 40, and then is fixed to the expanded rubber 40. The oil ring 2 should be fitted into the expanding rubber 40 before machining or the separating from the expanding rubber 40 after lapping.

In order to facilitate the installation of the oil ring 2 for lapping and the separation of the oil ring 2 after the lapping process, the lower end stopper portion 60 of the present invention includes the second air inflow path 61; A second air discharge path (62); A second extension tube 63; And a stopper (64).

The second air inflow path (61) is formed long from the upper portion of the main body (10) to the lower portion of the expanded rubber (40).

The second air discharge path 62 is formed in the main body 10 located under the expansion rubber 40 and is communicated with the second air inflow path 61 and penetrates through the outer circumferential surface.

The second expansion tube 63 is coupled to the main body 10 such that the second air exhaust passage 62 of the main body 10 is included and the air discharged from the second air exhaust passage 62 And is formed into a cylindrical shape and is expanded by the air discharged from the second air discharge path (62).

The stopper 64 is in contact with the outer periphery of the second extension tube 63 and the upper end thereof is in contact with the lower end of the expanding rubber 40. The stopper 64 has a plurality of arc- When the second extension tube 63 is extended, the respective arc plates are moved outward to expand outwardly, so that the oil is supplied from the lower end of the expansion rubber 40 to the outer periphery of the second extension tube 63, (2) is prevented from falling to the bottom, and is made up of a plurality of pieces.

As described above, the lower end stopper portion 60 of the present invention is configured such that the stopper 64 is opened by the extension of the second extension tube 63 to move outward so that the oil ring 2 positioned at the lowermost end in the lapping process, After the lapping process, the stopper 64 is pinched and moved inward by the contraction of the second extension tube 63 so that the oil ring 2 is separated from the extension rubber 40, As shown in FIG.

The upper end stopper portion 50 and the lower end stopper portion 60 may be formed so that the upper and lower portions of the extended rubber 40 are received so that the extended rubber 40 is prevented from being separated from the outside of the main body 10. [ do.

The lower end of the stopper 64 is prevented from being separated from the lower end of the main body 10 by the lower end of the stopper 64, And a stopper 64a is provided on the inside of the upper portion of the stopper 64. A lower end of the split jaw 30 is provided with a stopper 64a for catching the stopper 64a, So that the stopper 64 is prevented from being separated from the main body 10.

The technical idea should not be interpreted as being limited to the above-described embodiment of the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Accordingly, such modifications and changes are within the scope of protection of the present invention as long as it is obvious to those skilled in the art.

1:
2: Oil ring
10: Body
11: a first air inflow path
12: the first air discharge passage
12a: upper air exhaust passage
12b: Lower air discharge passage
20: first extension tube
21: Upper extension tube
22: Lower extension tube
30: Split jaw
31: hanging jaw
40: Extended rubber
50: upper stopper portion
60: lower stopper portion
61: the second air inflow path
62: second air exhaust passage
63: second extension tube
64: Stopper
64a:
70: Stopper accommodating portion

Claims (4)

A first air inflow passage 11 mounted vertically downward from the main shaft 1 and formed to be long from the top to the bottom, a first air inflow passage 11 communicating with the first air inflow passage 11, (10) having a passage (12);
The first air discharge path 12 is formed in a cylindrical shape and is opened to the inside so that the air discharged from the first air discharge path 12 is connected to the main body 10 so that the first air discharge path 12 of the main body 10 is included, A first expansion tube (20) extending by the air discharged from the first air discharge path (12);
A plurality of arc plates having a predetermined radial shape are formed in a cylindrical shape, and a peripheral edge of each circular arc plate is in contact with an outer peripheral edge of the first extension tube 20, and when the first extension tube 20 is expanded, A plurality of split jaws 30 moved outwardly while flaring;
The outer circumferential edge of each of the division jaws 30 abuts on the inner circumferential edge of the oil ring 2, and when the first expansion tube 20 expands, each arc plate expands to contact the inner circumferential edge of the oil ring 2, So that the split jaws 30 are returned to their original positions so as to be separated from the inner peripheral edge of the oil ring 2 to separate the oil ring 2 An expandable rubber 40 for allowing the resin to be removed;
Wherein the oil ring wrapping device comprises an oil ring wrapping device for an automotive engine piston. The method according to claim 1,
The first air discharge path (12)
An upper air discharge passage (12a) communicating with the first air inlet passage (11) and formed in an upper portion of the main body (10)
And a lower air discharge passage (12b) communicating with the first air inlet passage (11) and formed in a lower portion of the main body (10)
The first expansion tube 20 includes an upper expansion tube 21 extending by the air exhausted from the upper air exhaust passage 12a and a second expansion tube 21 extending by the air exhausted from the lower air exhaust passage 12b And a lower extension tube (22). ≪ Desc / Clms Page number 13 > The method according to claim 1,
An upper stopper portion 50 fixed to the upper portion of the main shaft 1 and contacting the uppermost oil ring 2 to prevent the uppermost oil ring 2 from being released to the upper portion of the expanded rubber 40, ;
A lower stopper portion 60 provided to abut the lower end of the expanded rubber 40 and contacting the oil ring 2 positioned at the lowermost portion to prevent the oil ring 2 located at the lowermost portion from being released to the lower portion of the expanded rubber 40, Further comprising: an oil ring wrapping device for an automotive engine piston. The method of claim 3,
The lower end stopper portion (60)
A second air inflow passage (61) formed to extend from the upper portion of the main body (10) to a lower portion of the expanded rubber (40);
A second air discharge passage (62) formed in the main body (10) located under the expanded rubber (40) and communicating with the second air inlet passage (61) and penetrating through the outer peripheral surface;
And is formed in a cylindrical shape so as to be opened to the inside so that the air discharged from the second air discharge path (62) is connected to the main body (10) so that the second air discharge path (62) A second expansion tube (63) extending by the air discharged from the second air discharge path (62);
A plurality of circular arc plates having a radial shape at a predetermined angle are in a cylindrical shape and the peripheral edge of each circular arc plate is in contact with the outer periphery of the second expanding tube (63) When the second expansion tube 63 is extended, the respective circular arc plates are fanned out and moved outward so that the oil ring 2 is lowered from the lower end of the expansion rubber 40 to the lower side And a plurality of stoppers (64) for preventing the stopper (64).

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