CN2474796Y - Diesel engine crank shaft end cover - Google Patents

Abstract

The utility model discloses a diesel engine bent shaft end cap comprising an end cap and an alloy tile, wherein the end cap is provided with a bearing base hole, the side of the base hole is provided with an oil return hole and a bearing assemblage hole, the middle of the base hole is provided with a bearing hole engageable with the alloy tile interference, the alloy tile is the ring shape or the ring shape with a boss, the inner wall is provided with a ring oil groove, and the two sides of the outer wall are correspondingly provided with oil holes communicated with the oil groove. The alloy tile makes the sealing surface of the end cap wider and the service life of the antifriction bearing longer. The alloy tile engages with the end cap bearing bore interference. When the alloy tile is abraded, it can be removed and changed so that the bent shaft and the end cap can not be obsolete simultaneously, and the maintenance is very convenient.

Description

The crankshaft of diesel engine end cap

The utility model belongs to a kind of parts of diesel engine, is specifically related to the improvement of bent axle end cap.

The bent axle end cap of existing diesel rolling bearing is used for supporting and installing bent axle, and a bite roller bearing is installed on the bearing socket of end cap, and in order to bent axle to be installed, the termination of bent axle is goed deep into the bent axle end cap and held the hole, holds the hole and seals with cooperating of bent axle termination.The shortcoming of this bent axle end cap is: 1, the bearing (ball) cover main oil gallery of existing diesel, lead to rod journal, the main oil gallery both sides of machine oil indicator and the sealing surface that bent axle is slidingly matched are narrow, and when rolling bearing when chance failure and fair wear and tear appear in lubrication system again, rolling bearing will be worn.After the rolling bearing wearing and tearing, when diesel engine is worked again, bent axle is subjected to the pressure of flywheel and the system of moving of band pretightening force, the degree of balance of bent axle is destroyed, crankshaft journal just produces half dry type side direct friction with the sealing surface of end cap main oil gallery both sides, because all being castings materials, bent axle and end cap form the hard state of hard grind, face when crankshaft journal and end cap main oil gallery both sides directly rubs, when producing the gap, the machine oil of end cap main oil gallery just leaks from the matching surface of main oil gallery both sides sealing face and crankshaft journal, and the engine oil pressure of rod journal significantly descends and produces the bearing-burning-out fault.Because main oil gallery leaks machine oil, the oil duct pressure of machine oil indicator reduces, and the machine oil indicator can not rise, and loses the demonstration of lubrication system works, reduces the greasy property of Rocker arm assembly valve group simultaneously, increases the rate of depreciation of Rocker arm assembly valve rocker group.2, after crankshaft main bearing end cap and crankshaft journal produce the half dry type friction, the working surface of heavy damage crankshaft journal, bent axle and end cap are scrapped simultaneously, the reduction that the unmatched use of existing diesel end cap and bent axle is serious the working life of diesel engine, increase user's maintenance user cost, also wasted ample resources.

The purpose of this utility model is to provide a kind of crankshaft of diesel engine end cap, prevents the wearing and tearing of bent axle and end cap, prolongs diesel engine working life, reduces maintenance cost.

The utility model crankshaft of diesel engine end cap, watt form by end cap and alloy, end cap is provided with bearing saddle bore, seat side, hole is provided with spill port and bearing pilot hole, seat has in the middle of the hole and holds the hole, holds hole and alloy watt interference fit, and alloy watt is ring or the solid annular that has boss, inwall has an annular oil groove, and outer wall both sides correspondence has oil hole and communicates with oil groove.

The utility model crankshaft of diesel engine end cap holds hole place alloy watt is set, broadening the sealing surface of end cap, thereby increased the supporting force of bent axle and the supporting force that crankshaft-flywheel sinks, increased the prefastening force that driving belt produces, increased the working life of rolling bearing; Alloy watt holds the hole interference fit with end cap, can change, and is unlikely that bent axle and end cap are cancelled simultaneously, and easy to maintenance.

The utility model is described in further detail below in conjunction with accompanying drawing;

Fig. 1 is the plan view of the utility model crankshaft of diesel engine end cap;

Fig. 2 is the A-A sectional view of the utility model Fig. 1;

Fig. 3, Fig. 4, Fig. 5 are respectively plan view, left view and the plan views of the utility model alloy watt;

Fig. 6 is the B-B sectional view of the utility model Fig. 3.

As shown in Figure 1, the crankshaft of diesel engine end cap is made up of end cap 1 and alloy watts 2, bearing saddle bore 9 is set on the end cap, seat hole sidewall 3 has back axis hole 5 and bearing pilot hole 6, have in the middle of the bearing saddle bore and hold hole 4, hold hole place and alloy watts 2 is set and holds the hole interference fit, and by pin 11 location, alloy watt inwall and crankshaft journal are slidingly matched.

As shown in Figure 3, alloy watts 2 is for ring or for having the ring of boss, ring outer wall or boss outer have arc notch 10 one, in order to the location of end cap.An alloy watt inwall has annular oil groove 7, and outer wall both sides correspondence has oil hole 8 and communicates with oil groove 7.

When lubrication system broke down, alloy watt produced friction with bent axle, and alloy watt wearing and tearing increase leakage machine oil with the crankshaft journal matching gap; when engine oil pressure descends; removable lower end cap is changed new alloy watt, just can remedy the matching gap of wearing and tearing, thereby bent axle and end cap are shielded.

Claims (2)

1, crankshaft of diesel engine end cap, it is characterized in that: form by end cap (1) and alloy watt (2), bearing saddle bore (9) is set on the end cap, seat hole sidewall (3) has spill port (5) and bearing pilot hole (6), have in the middle of the bearing saddle bore and hold hole (4), hold the place, hole and alloy watt (2) is set and holds the hole interference fit.

2, diesel engine song according to claim 1 is taken out end cap, it is characterized in that: alloy watt is for ring or have the ring of boss, and inwall has annular oil groove (7), and outer wall both sides correspondence has oil hole (8) and communicates with oil groove (7).

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