JPH053733U - Combination oil ring - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To reliably prevent the side rail from rotating with respect to the spacer expander. [Structure] A wire having a mountain portion is attached to a spacer expander, and the mountain portion of the wire is engaged with a notch on an inner peripheral side of a side rail.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to a combined oil ring mounted on a piston of an internal combustion engine.

[0002]

[Prior art]

  In the ring grooves of the piston of the internal combustion engine, press the pressure ring and oil Troll rings are arranged in sequence. A typical example of this oil control ring , A ring-shaped upper and lower side rails with a thin plate mating part, and radial or circumferential direction Spacer extract having a plurality of ears that are corrugated in the direction and are spaced on the inner peripheral side It is a combination oil ring made of pandas.

[0003]   As shown in FIG. 5, the upper and lower cylinders that make up the combined oil ring in the ring groove 3 are The drails 2 and 2 apply the spring force of the spacer expander 1 via the ears 4 to the inner peripheral surface thereof. It is received by and constantly expanded outward in the radial direction, and this expansion force is applied to the outer surface of the side rails 2 and 2. It functions to create a contact pressure on the cylinder inner peripheral surface 6.

[0004]   As a general idea, there is no phase between the side rails 2 and 2 and the spacer expander 1. It is said that there is no relative movement (relative rotation), but the internal combustion engine has high speed and high output. Vibration of the piston, cylinder, piston ring, etc. due to force and weight reduction The side rails 2 and 2 and the spacer expander 1 are relatively Circumferential movements or irregular rotational movements are actually occurring.

[0005]   Such an irregular turn between the side rails 2 and 2 and the spacer expander 1 Rolling causes the following malfunction of the combined oil ring, which causes the oil control Reduce function.  (B) Relative rotation between the side rail and spacer expander is Suddenly wear the inner surface of a side rail and the ear of the spacer expander, and combine them. Reduce the tension and surface pressure of the oil ring.

[0006]  (B) The preferred relative positional relationship between the side rails and the spacer expander is scrap. The upper and lower side rails, and the upper and lower side rails. The gap between the pacer expander and the mating part of the expander coincides in the axial direction, increasing gas leakage and increasing the oil It causes deterioration of scratching performance and breakage of the abutment part of the spacer expander.  (C) The rotating motion of the side rail is such that the mating part is on the side surface of the ring groove (especially aluminum (In the case of alloy piston), the wear amount is increased and the side rail function is reduced. Let

[0007]   Due to the relative rotational movement between the side rails and the spacer expander, In order to eliminate the condition, the relative rotation between the side rail and the spacer expander Several means have been proposed to prevent it.

[0008]   Japanese Utility Model Publication No. 54-161447 and Japanese Utility Model Publication No. 60-102446 are At least one recess is formed on the inner peripheral side of the drail and has a combined oil ring. When the piston is placed in the cylinder bore, the ear of the spacer expander is Side rail recesses that do not directly contact the inner peripheral surface of the side rail. The ears that oppose the bulge are projected outward in the radial direction to allow the recess to engage with the ears. The configuration is shown.

[0009]

[Problems to be solved by the device]

  In the conventional example as described above, the ears of the spacer expander and the inner peripheral surfaces of the side rails The engagement with the recessed part of the spacer disengages to cause relative rotation between the spacer expander and the side rail. The above-mentioned drawbacks (a)-(c) are easily exhibited.

[0010]   Therefore, the present invention does not cause premature wear of the side rails, A combination oil tank that prevents relative rotation of the drail to the spacer expander. It is a problem to be solved to provide the service.

[0011]

[Means for Solving the Problems]

  SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an inner peripheral surface of the upper and lower side rails. Make a notch on the top of the wire and attach it to the spacer expander. The technical means of engaging the notch is basically adopted.

[0012]   More specifically, the present invention relates to upper and lower side rails and an inner peripheral surface of the side rails. Oil replenisher having a spacer expander for receiving a plurality of spaced ears The side rail has at least one notch on the inner peripheral surface, The spacer expander passes through the long hole of the main body and the notch of the side rail. A combined oil ring is provided that includes a wire having ridges that engage with each other.

[0013]

[Action]

  The wire used in the present invention elastically engages the notch of the side rail, Since the drail hits the wire softly, there is no wire breakage or noise. On top, ensure that the side rails and wire engagement are maintained.

[0014]

【Example】

  Please refer to FIG. The spacer expander 11 constituting the combination ring 10 is The corrugations are formed in the radial direction, and the oil holes 13 are formed in the facing walls 12 of the main body. To drill. On the inner peripheral side of the spacer expander 11, there are ears 14 extending vertically. Are formed separately.

[0015]   The oil hole 13 of the spacer expander 11 has at least one ridge 15 Insert the end of the wire 16 bent so that the peak 15 of the wire 16 It is attached to the spacer expander 11 so as to face one of the ears 14.   The wires 16 are connected to the spacer expander 11 relative to each other, for example by 90 degrees. Are mounted with a phase difference of 180 degrees. That is, two wires 16 are used However, one is an upwardly facing mountain portion 15 and the other is an downwardly facing mountain portion 16.

[0016]   The upper and lower side rails 17 forming the combined oil 10 are There is a notch 19 on the inner peripheral side. This notch 19 is a shape that straddles the abutment portion 18. The shape is such that there is and the mountain portion 15 of the wire 16 is received.

[0017]   Attach the wire 16 to the spacer expander 11 with a phase difference of 180 degrees, for example. When installed, the notch 19 of the upper side rail 17 is placed in the upward mountain of the wire 16. Engaging the part 15 and downwardly inserting another wire 16 into the cutout of the lower side rail 17. When it is engaged with the crests 15 of the spacers, the abutment portions 18 have a phase difference of 180 degrees and the spacer exhaust Since it is located with respect to the spander 11, the abutment portion 18 does not come on the coaxial line. Absent.

[0018]   2 and 3, the notches 19 on the inner peripheral side of the upper and lower side rails 17 are joined together. 1 is the same as the example of FIG. No. and the description is omitted.   Also in the example of FIG. 2, the mating portions 18 of the upper and lower side rails 17 are coaxial with each other. Try not to.

[0019]   In the illustrated example, the two wires 16 are arranged so as to be offset from each other, and the notch 19 and the wire are arranged. Engaging with the mountain portion 15 of the ear 16 is a spacer for the upper and lower side rails 17. Prevents rotation with respect to the expander 11 and aligns the upper and lower mating portions 18 with each other. Is being prevented. Apart from such an illustrated example, one wire 16 is directed upwards and downwards. The facing ridges 15 are provided, and each ridge 15 is placed in the notch 19 of the upper side rail 17 and below. You may make it engage with the notch 19 of the side rail 17.   It is a straight wire 1 to make two peaks 15 using one wire 16. After 6 is passed through the oil hole 13, each mountain portion 15 is formed by bending.

[0020]   The test results are shown below. The engine has a cylinder diameter of 74 mm and a displacement of 1800 cc. Using a cylinder 4-cycle gasoline engine, operating conditions of 6000 rpm x 4/4 are adopted. I used it.   The spacer expander used is stainless steel with a width of 4 mm and a thickness of 0.45 mm. It has a wave shape in the radial direction. The side rail used had a width of 2.6 mm and a thickness of 0.6 mm. .

[0021]   In the example according to the present invention, as shown in FIG. Has a phase difference of 180 degrees.   The conventional product has the same configuration as that of FIG. 1 except that the notch and the wire are not provided. Fig. 4 shows the oil consumption with respect to the operating time of both test products. It is clear from the figure As described above, the device of the present invention was able to maintain a low oil consumption state for long-term operation.

[0022]

[Effect of device]

  According to the present invention, rotation of the side rail with respect to the spacer expander is prevented. The oil consumption is reduced and the engine is You can extend working hours.

[Brief description of drawings]

FIG. 1 is a partial perspective view of an example of the present invention.

FIG. 2 is a partial perspective view of another example of the present invention.

FIG. 3 is a partial plan view of an example of a side rail.

FIG. 4 is a graph showing test results of the present invention product and the conventional product.

FIG. 5 is a sectional view of a conventional combined oil ring.

[Explanation of symbols]

10 combination oil ring 11 Spacer expander 16 wires 17 Side rail 18 Abutment 19 notches

Claims (5)

[Scope of utility model registration request] 1. A combined oil ring having upper and lower side rails and a spacer expander for receiving inner peripheral surfaces of the side rails at a plurality of spaced ears, wherein at least one inner peripheral surface of the side rails has at least one inner peripheral surface. Has a notch,
A combined oil ring, wherein the spacer expander includes a wire having a mountain portion that passes through an elongated hole of a main body of the spacer expander and engages with a notch of the side rail. 2. The combined oil ring according to claim 1, wherein at least one notch of the upper and lower side rails is provided at a mating portion. 3. The combined oil ring according to claim 1, wherein the spacer expander has two wires that engage with the notches of the upper and lower side rails, and the wires are arranged at spaced positions. 4. The spacer expander comprises a wire having ridges and valleys, the ridges engaging the notches in the upper and lower side rails, and the valleys in the notches in the lower side rail. The combined oil ring of claim 1 that engages. 5. The combined oil ring according to claim 1, wherein the upper and lower side rails have their abutment portions offset from each other in the axial direction.