KR970010868B1 - Flexible piston - Google Patents

Abstract

A self balancing flexible piston(1) having crown part(2), skirt part(3) and elastic members is disclosed. The crown part(2) and skirt part(3) are joined by fixing member. In the crown part(2) piston rings(6) are installed. The skirt part(3) supports crown part(2) in order to the piston rings(6) can be contact parallel powerfully to inner circumference. The elastic members are installed on the outer circumference of skirt part(3) which contact to cylinder wall so as to balance the reciprocating motion of piston(1). Thereby, it is possible to keep the piston's outer wall to be parallel to the cylinder wall, and by that the piston(1) can move smoothly at its maximum speed. so it can prevents the wearing of piston ring(6) and noise. And by removing tilt and slap happening any leak of compressed fuel or gas are not happened.

Description

Self-Aligning Flexible Piston (Flexible-Piston)

1 is a half sectional view showing a first embodiment of the present invention.

FIG. 2 is a bottom view of FIG. 1. FIG.

3 is a cross-sectional view taken along the line A-A of FIG.

4 shows a crown portion of FIG. 1, (a) is a half sectional view, and (b) is a bottom view.

5 is a half sectional view of the skirt portion of FIG.

6 shows a riveting disk (Riveting-Disk) of the first diagram, (a) is a cross-sectional view, (b) is a plan view.

FIG. 7 shows a stop ring in FIG. 1, (a) is a cross sectional view, and (b) is a plan view.

8 is a half sectional view showing a second embodiment of the present invention.

9 is a bottom view of FIG.

FIG. 10 shows a skirt portion of FIG. 8, (a) is a half sectional view, and (b) is a bottom view.

FIG. 11 shows a blade holder ring in FIG. 8, (a) is a cross sectional view, and (b) is a plan view.

FIG. 12 is a metal blade (Contactor Blade) in FIG. 8, (a) is a cross-sectional view, (b) is a plan view, (c) is a front view.

FIG. 13 is a half sectional view showing a third embodiment of the present invention. FIG.

FIG. 14 is a bottom view of FIG. 13. FIG.

FIG. 15 shows a skirt portion of FIG. 13, where (a) is a half sectional view and (b) is a bottom view.

FIG. 16 shows a wire spring in FIG. 13, (a) is a side view, (b) is a top view, and (c) is a front view.

FIG. 17 is a half sectional view showing a fourth embodiment of the present invention. FIG.

FIG. 18 is a bottom view of FIG. 17. FIG.

FIG. 19 shows a roll mount disk in FIG. 17, (a) is a sectional view, and (b) is a plan view.

FIG. 20 is a half sectional view of a contact roller in FIG. 17. FIG.

FIG. 21 is a cross sectional view of a roll train bracket for accumulating a contact roller; FIG.

FIG. 22 is a front view of the pivot pin in FIG. 17; FIG.

* Explanation of symbols for main parts of the drawings

1: Piston 2: Crown

3: skirt portion 4: riveting disk (Riveting Disk)

5,13 Groove 7: Clevis

9,15,52: rivet hole 10: tension blade

11: Contact Ridge 12: Stop Ring

16,76: Rivet 31,31a: Blade Fit Groove

32,32a: Blade Holder Ring 33,33a: Ring Groove

34: Contactor Blade 40: Wire Spring (Contactor Spring)

50: Roll Mount Disk 60: Contact Roller

61: Roll Pivot Pin 63: Roll Train Bracket

64: U-shaped fixing part

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-aligning flexible piston, wherein a crown portion and a skirt portion in a piston used in a reciprocating internal combustion engine or a reciprocating pump are provided. In order to maintain the distance between the cylinder and the piston flexibly, a ring is used for the crown part, and a roll with an elastic metal plate, a spring or an elastic metal bracket is used for the skirt part. The present invention relates to a self-aligning flexible piston (Pixon-Piston) having a diameter of the piston elastic.

In general, since a reciprocating internal combustion engine using a piston and a piston currently used in a reciprocating pump using a piston are composed of a single body of rigid body, the piston is formed by a thermal expansion or contraction during use. The outer diameter of the piston was made sufficiently smaller than the inner diameter of the cylinder in order to prevent the state of being stuck in the body was configured to maintain a sufficient distance between the piston and the cylinder.

In the above structure, since there is a wide gap arbitrarily made between the cylinder and the piston, if the gap is not filled in an appropriate manner, the compressed fuel or the compressor body leaks out therebetween, and thus cannot perform a normal function.

In order to prevent excessive leakage of the compressed fuel or the compressor body and to increase the compression efficiency, a deep and narrow groove is machined in the entire circumference of the upper outer periphery of the piston, which is conventionally called a crown, and a piston ring is inserted into the groove. This prevents leakage of compressed fuel or compressor body between the gaps between the cylinder and the piston, and forms a section called a skirt extending integrally with the piston at the lower part of the piston, so that the piston ring is in contact with the cylinder at right angles. I've been able to keep it.

However, the piston in the conventional structure as described above does not perform the function of compressing the fluid or the gas, but merely serves as the transport of the piston ring, the actual role of the compression of the fluid or gas has been the piston ring, the cylinder and the piston Due to the large gap between the pistons, the piston tilts left and right when the piston reciprocates, and the tilt causes the slap that strikes the cylinder. Whenever the direction of movement is changed up and down, the noise is generated by the slap phenomenon, and the tilt motion of the piston is not mono-centric rocking but the cylinder is changed whenever the direction of the piston changes. Since the contact angle between the wall and the piston ring is readjusted, it is a poly-centric movement. The phenomenon occurs that the piston ring slides in the groove and rotates in any direction, which adversely affects the uniform output of the compressive force. The tilting motion causes the contact angle between the piston ring and the cylinder wall. Since the piston ring is gradually slid and rotated in any direction in the groove while continuously changing, the edge of the piston ring is gradually blunted by the frictional force such that compressed fuel or gas may leak.

The present invention was created to solve the above problems, and configured to separate the crown and the skirt portion of the piston, the crown portion using the piston ring according to the existing method and the skirt portion is elastic By attaching a roll attached to a metal plate, a spring, or a metal bracket with elasticity, it gives elasticity to the piston diameter, eliminating the gap (gap or clearance) between the cylinder and the piston to smoothly reciprocate as much as possible when the piston moves up and down. By eliminating tilt and slap, noise can be prevented and fuel leakage and compression efficiency can be increased by efficiently preventing leakage of compressed fuel or compressor body. Its purpose is to provide a self-aligning flexible piston.

Hereinafter, with reference to the accompanying drawings will be described in more detail the configuration and operation effects of the present invention.

The first embodiment of the present invention is as shown in Figures 1 to 7, the configuration of the piston (1) of the present invention is a crown portion 2, a skirt that can be separated from the crown portion (2) And a riveting disk (4) for joining the section (3) and the crown section (2) and the skirt section (3), wherein the crown section (2) is formed by inserting a piston ring (6) into a cylinder (Fig. A plurality of deep and narrow grooves 5 formed around the circumference of the upper outer circumference of the columnar member to prevent leakage of the compressed fuel or the compressor body between the gap between the piston and the piston 1, and a connecting rod (not shown in the drawings). Clevis (7) integrally formed on the bottom of the columnar member having a piston pin hole (8) into which a piston pin (not shown) is inserted, so as to penetrate the upper and lower surfaces of the columnar member. A plurality of formed rivet holes 9 are provided.

The skirt portion 3 is a cylindrical shape having a space therein, and a plurality of elastic wings 10 having contact protrusions 11 at the ends formed integrally in the longitudinal direction on the outer periphery of the cylindrical member, and stops. It is provided with a groove 13 formed in the inner circumference of the cylindrical member to fit the ring (12).

The riveting disc 4 is a circular thin plate member, which has a rectangular hole 14 perforated in the center thereof, and a rivet hole 15 formed to correspond to the rivet hole 9 of the crown portion 2 near the outer periphery. )

8 to 12 show a second embodiment of the present invention, since the crown portion 2 and the riveting disk 4 are the same as those of the first embodiment, the same reference numerals are used and the description thereof will be omitted. .

In the present embodiment, the skirt 3 includes a groove 13 for installing a plurality of wing fixing grooves 31 formed in the longitudinal direction on the outer circumference of the cylindrical member, and a ring groove 12 for fitting the wing fixing ring 32; It consists of a metal plate blade (34) coupled to the wing fixing groove (31).

13 to 16 show a third embodiment of the present invention, in which the same components as those of the above embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

The present embodiment forms a plurality of wing fixing grooves 31a in the longitudinal direction on the outer periphery of the skirt portion 3, and wing fixing rings 32a in the circumferential direction on the outer periphery of the upper and lower ends of the skirt portion 3. By forming a ring groove (33a) that can be inserted, it is to be able to fit the steel wire spring 40 of the wire rod.

17 to 22 show a fourth embodiment of the present invention, in which the same parts as those of the above embodiment are denoted by the same reference numerals and description thereof will be omitted.

In the present embodiment, the roll mounting disc 50 is applied as a member for coupling the crown portion 2 and the skirt portion 3 of the piston 1, and the skirt portion 3 has a contact roller 60 up and down. To form a roll train bracket (63) in which the pin hole (62) is perforated to be rolled up with the roll pivot pin (61), and the U-shaped fixing portion (64) is formed in the roll train bracket (63). The roll mount disc 50 is formed to be fixedly inserted into the c-shaped fixing part 64 of the roll train bracket 63, and a hole 51 is formed in the center thereof, and a rivet hole of the crown part 2 is formed. The rivet hole 52 is drilled at a position corresponding to (9).

Reference numeral 70 is a rivet formed with a stepped 71 to fix the crown portion 2 and the roll mount disk 50 at regular intervals.

Referring to the assembly and operation of the present invention having the configuration as described above, the first embodiment first installs the piston ring (6) in the plurality of grooves (5) formed in the separated crown portion (2), the skirt portion ( After the stop ring 12 is inserted into the groove 13 formed at the inner circumference of 3), the stop ring 12 contacts the lower surface of the crown portion 2 and the upper surface of the riveting disk 4. In one state, the crown portion 2 and the skirt portion 3 are formed by fastening the rivet 16 by matching the rivet hole 15 of the riveting disc 4 with the rivet hole 9 of the crown portion 2. The combined piston (1) is to be made.

A piston pin (not shown) for connecting a connecting rod (not shown) can be inserted into the piston hole 8 of the clevis 7 formed on this bottom surface integrally with the crown portion 2.

At this time, the skirt portion 3 is preferably extruded from a material such as aluminum, which is light and easy to process, and has a high resistance to abrasion. The inner circumferential surface of the skirt portion 3 is formed to have no unevenness and contacts the end portion at the outer circumference. The longitudinal thin and wide elastic wings 10 having protrusions 11 are integrally formed so that the elastic wings 10 can be pressed into a cylinder having an inner diameter smaller than the free outer diameter of the piston 1. Will be.

However, the force pushing the inner wall of the cylinder by the contact protrusion 11 of the elastic wing 10 should be weak enough to suppress the tilt of the piston 1 and not have a slight disturbing influence on the reciprocation of the piston 1. To meet these two opposite requirements, the cross section of the elastic blade must be designed so that the bending moment curve of the elastic blade 10 rises rapidly after passing a predetermined point.

The operation of the first embodiment assembled as described above is such that the piston ring 6 is inserted into the groove 5 of the crown portion 2 by the piston 1 reciprocating in the cylinder (not shown). An elastic wing formed on the outer periphery of the skirt portion 3 coupled to the inner side of the cylinder portion 2 and the riveting disk 4 while compressing the fuel or gas in the cylinder while being in close contact with the inner wall ( When the piston 1 is separated from the reciprocating shaft core by the elastic force of 10), the reciprocating shaft core is automatically adjusted flexibly.

The reciprocating axial center of the piston 1, which is converted by the piston 1 by tilting left and right during the up and down movement of the piston 1 due to the distance between the cylinder and the piston 1, The piston 1 always moves on the same reciprocating axis line by being automatically adjusted by the repulsive force, so that the inner wall of the cylinder and the outer wall of the piston 1 always maintain parallel angles, and thus the piston 1 as smoothly as possible. This reciprocating motion prevents the wear of the piston ring 6, eliminates the tilt and slap phenomena, prevents noise, and effectively prevents leakage of compressed fuel or compressor body. It will be possible to prevent.

In the second and third embodiments of the present invention, the elastic member 10, which is the elastic member in the first embodiment, is formed integrally with the outer periphery of the skirt portion 3, and the elastic member is formed outside the skirt portion. It is configured to be attached to the periphery.

In the second embodiment, the wing fixing groove 31 is formed on the outer periphery of the skirt 3, and the ring fixing groove 31 is formed around the upper and lower outer peripheries of the skirt 3. After coupling the metal plate blade (34) to the ring groove (33) by inserting the wing fixing ring (32) is to be able to fix the metal plate blade (34) of the floating type plate metal.

In the third embodiment, the wing fixing groove 31a is formed on the outer circumference of the skirt 3, and the ring fixing groove 31a is formed around the upper and lower outer circumferences of the skirt 3. After coupling the steel wire spring (40) to the ring groove (33a) by inserting the wing fixing ring (32a) is to be able to fix the steel wire spring (40) of the floating type wire (metal).

In the second and third embodiments, the gap between the wing fixing grooves 31 and 31a is different, and the metal plate blade 34 and the floating type of which the elastic member is a floating type sheet metal. type) The only difference is that the steel wire spring 40, which is a wire metal, is used, and the coupling relationship between the crown portion 2 and the skirt portion 3 is the same as that of the first embodiment, and the elastic force is applied by the elastic member. Since the operation effect of automatically adjusting the reciprocating shaft core flexibly when the piston 1 is separated from the reciprocating shaft core is the same as in the first embodiment, detailed description thereof will be omitted.

In the fourth embodiment, unlike the automatic adjustment of the reciprocating shaft core by the elastic force of the elastic member in the first to third embodiments, the roll train bracket 63 made of elastic material rolls the contact roller 60 is rolled. The skirt portion 3 is an assembly of an elastic material roll train bracket 63 in which at least three or more contact rollers 60 are arranged.

In the coupling relationship of the fourth embodiment, the skirt portion 3 composed of at least three or more roll train brackets 63 in which the contact rollers 60 are rotatably arranged in the upper and lower pin holes 62 with the roll pivot pins 61. And fix it so that the U-shaped fixing portion 64 is radially inserted into the roll mount disk 50, and then the rivet hole 9 of the crown portion 2 and the rivet hole 52 of the roll mount disk 50 coincide with each other. In order to maintain the gap between the crown (2) and the skirt (3) at a fixed interval by fixing with a rivet (70) formed a stepped 71 is combined.

At this time, the outer diameter surface of the radially positioned contact roller 60 has a size large enough to correspond to the inner diameter surface of the cylinder (not shown) or fine enough to have an appropriate contact force when the piston 1 is inserted into the cylinder. .

The operation of the fourth embodiment is performed by the piston 1 reciprocating in the cylinder (not shown) so that the piston ring 6 inserted into the groove 5 of the crown portion 2 comes into close contact with the inner wall of the cylinder. In the internal combustion stroke that compresses the fuel or gas of the gas, the contact roller 60 built into the roll train bracket 63 made of a material having elastic force is brought into close contact with the inner wall of the cylinder, and the gap between the cylinder and the piston 1 When the piston 1 is moved up and down, the reciprocating shaft center of the piston 1, which is converted by tilting left and right, is automatically adjusted by the elastic repulsive force of the roll train bracket 63. 1) always moves on the same reciprocating shaft core line, so that the inner wall of the cylinder and the outer wall of the piston 1 always maintain parallel angles, so that the piston 1 can reciprocate as smoothly as possible and thus the piston ring 6 ) To prevent wear As a result, the tilt phenomenon and the slap phenomenon can be eliminated to prevent noise, and the leakage of the compressed fuel or the compressor body can be effectively prevented.

At this time, the contact roller 60 is to maintain the contact pressure of the inner diameter of the cylinder and the skirt portion 3, the contact is not a sliding contact but a rolling contact.

As described above, the present invention is configured by separating the crown portion and the skirt portion of the piston used in the internal combustion engine and other reciprocating engines using the piston and the crank mechanism, and built in the outer periphery of the skirt portion. Elastic members such as wings, metal plate wings, metal steel wire springs, or elastic brackets with rollers are installed so that the outer diameter of the piston has elasticity. Since the inner wall of the cylinder and the outer wall of the piston always maintain parallel angles, the piston can reciprocate as smoothly as possible, thereby preventing the wear of the piston ring. Slap phenomenon can be eliminated, noise can be prevented, and leakage of compressed fuel or compressor body can be effectively prevented. It has the effect of being able to do it.

Claims (7)

A piston used for a reciprocating engine in which a piston ring is in close contact with an inner wall of a cylinder and compressed, wherein the crown portion on which the piston ring is mounted and the skirt portion for supporting the outer peripheral surface of the piston ring in parallel contact with the inner surface of the cylinder are separated from each other And a fixing member for coupling the two members, and an elastic member installed at an outer periphery in close contact with the cylinder inner wall of the skirt to convert the piston by tilting left and right during up and down movement of the piston. The self-aligning flexible piston (Flexible-Piston) characterized in that the reciprocating axial center of the flexible member is automatically adjusted to be flexible by the elastic repulsive force of the elastic member. 2. The crown portion of claim 1, wherein the crown portion penetrates the clevis having a piston pin hole into which the piston pin for connecting the connecting rod formed integrally with the bottom surface of the columnar member is inserted, and the upper and lower surfaces of the columnar member. Self-aligning flexible piston (Flexible-Piston) characterized by having a plurality of rivet holes for connection with the formed skirt portion. The self-aligning shape according to claim 1, wherein the skirt portion has a cylindrical shape having a space therein, and includes a groove formed in the inner circumference of the cylindrical member so as to fit the stop ring. Flexible piston. 2. The fastening member of claim 1, wherein the fixing member is a circular thin plate member having a rectangular hole drilled in the center thereof and a rivet hole formed to correspond to the rivet hole of the crown portion near the outer circumference thereof. Self-aligning flexible piston (Flexible-Pistion), characterized in that consisting of a rivet. The self-aligning shape according to claim 1 or 3, wherein the elastic member is formed by applying a plurality of elastic wings having contact protrusions at ends thereof integrally formed in the longitudinal direction on the outer circumference of the skirt portion. Flexible Piston According to claim 1 or 3, wherein the wing fixing grooves are formed on the outer periphery of the skirt portion, ring grooves are formed around the upper and lower outer periphery of the skirt portion, and the elastic wings separated from the skirt portion can be fixedly coupled. Self-aligning flexible pistons, characterized in that the. 3. An at least three or more elastic materials according to claim 1 or 2, wherein a roll mount disk having a center thereof open to the fixing member and having a rivet hole corresponding to the rivet hole of the crown portion is applied, and the contact rollers are arranged up and down. A skirt portion made of a roll train bracket is fixed to be inserted radially into the outer circumference of the roll mount disk so that a "c" shaped fixing portion is inserted radially. Self-aligning flexible piston (Flexible-Piston), characterized in that the coupling is fixed by rivets formed stepped to maintain a constant interval.