JPH087047Y2 - Diesel engine timer lubricator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a timer lubricating device for a diesel engine, and more particularly, to a timer lubricating device for a diesel engine having an improved timing gear case covering an injection pump, a timer and a gear train. .

[Prior Art] FIG. 3 shows, for example, a lubrication device for a timer in a conventional diesel engine found in Japanese Utility Model Publication No. 61-21526, in which an injection pump gear 3 for driving an injection pump 7 and a timer 4 are used. The internal timer gear (not shown) is lubricated by a timing gear case that covers the gear 3, the timer 4, and the gear train (not shown).
1A is provided with a jet nozzle 5 facing a concave portion for lubrication (circular hole 4a in FIG. 1) formed in the rotation axis of the timer 4, and the nozzle 5 is connected to an injection pump 7 or a cylinder block 8 by an oil supply pipe 6. It was connected to the oil gallery 9 and the oil was jetted out from the nozzle 5 forcibly.

Further, Japanese Utility Model Laid-Open No. 57-73317 discloses a technique in which an oil pump is provided in a timing gear case and the timer gear in the timer is lubricated by the oil pump.

Further, in Japanese Utility Model Laid-Open No. 62-179313, an oil guide groove is formed on the inner surface of the peripheral wall of the timing gear case and the inner surface of the front wall, and the oil groove is communicated with an oiling tool formed on the inner surface of the front wall to form a gear or the like. The technology that collects the lubricating oil scattered by the moving part of the timing gear case and adhered to the inner wall surface of the timing gear case to the lubrication tool through the oil guide groove and injects it as the lubrication oil of the timer gear from the lubrication tool into the recess for lubrication of the timer is shown. There is.

[Problems to be Solved by the Invention] Among the above-mentioned technologies, in the case of the first technology, engine trouble occurs when there is a problem due to vibration or splash of stones in the oil supply pipe provided outside the timing gear case. Moreover, the lubricating oil adhered to the inner wall surface of the timing gear case has not been effectively used as the lubricating oil for the timer gear.

Further, in the case of the second technique, another oil pump must be provided for lubrication of the timer gear, resulting in high cost and a space for providing the oil pump in the timing gear case.

Further, in the case of the third technique, the lack of lubricating oil may occur because the forced injection by the nozzle is not performed.

Therefore, an object of the present invention is to provide a timer engine lubrication device for a diesel engine, which can supply sufficient lubricating oil to the timer gear, has few failures, and is not expensive. is there.

[Means for Solving the Problem] According to the present invention, a lubrication recess formed in the rotation axis of the timer is formed on the inner surface of the front wall of the timing gear case that covers the injection pump gear that drives the injection pump, the timer, and the gear train. Is formed in the timing gear case, and an oil passage and an oil jet portion communicating with the oil passage are formed in the timing gear case. The oil jet portion opens into the oil sump portion.

[Operation] The oil sump catches the splash of the lubricating oil for the gear train in the timing gear case, and supplies the oil to the timer gear through the lubricating oil recess of the timer. At the same time, an oil jet is jetted from the oil jet portion, and at this time, the oil sump portion guides the oil jet and supplies the tire gear with the lubricating oil for the gear train captured in the oil sump portion, and further enhances the oil supply effect.

Also, since the splash of lubricating oil for the gear train in the timing gear case is captured and used as lubricating oil for the timer gear, the injection amount of the oil jet from the oil jet part is reduced, and the amount of oil to each part of the engine is secured accordingly. can do.

Further, since the oil supply pipe provided outside the timing gear case is omitted, it is possible to eliminate the trouble caused by defective piping.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, the rotary shaft center of the timer 4 is provided with a lubricating recess, that is, a circular hole 4a in the illustrated example. On the inner surface of the front wall of the timing gear case 1, there is formed an oil sump portion 2 which projects into the inlet portion of the circular hole 4a. The oil sump portion 2 is formed in an upward semicircular arc-shaped cross section.

An oil passage 10 and an oil jet portion 12 communicating with the oil passage 10 are formed in the timing gear case 1, and the oil jet portion 12 opens into the oil sump portion 2.

The oil sump 2 captures the splash of lubricating oil for the gear train in the timing gear case 1 and supplies it to the timer gear via the circular hole 4a. At the same time, the oil pressure-fed from the injection pump through the oil passage 10 is ejected from the oil jet portion 12, and at this time, the oil sump portion 2 guides the oil jet into the circular hole 4a and captures it in the oil sump portion 2. Lubricate the timer gear with the lubrication oil for the gear train,
Further enhance the refueling effect.

In this way, since the splash of lubricating oil for the gear train in the timing gear case is captured and used as the lubricating oil for the timer gear, the injection amount of the oil jet from the oil jet section is reduced, and to that extent to each part of the engine. In addition, since the oil supply pipe provided outside the timing gear case is omitted, problems due to defective piping can be eliminated and cost can be reduced.

[Effects of the Invention] The present invention has the following excellent effects.

(I) The oil sump catches the splash of the lubricating oil for the gear train in the timing gear case, supplies the oil to the timer gear through the recess for lubrication of the timer, and at the same time, the oil jet section injects the oil jet. The oil sump portion guides the oil jet and supplies the timer gear together with the lubricating oil for the gear train captured in the oil sump portion, so that the oil supply effect can be further enhanced.

(Ii) Since the splash of lubricating oil for the gear train in the timing gear case is captured and used as the lubricating oil for the timer gear, the injection amount of the oil jet from the oil jet part is reduced, and the amount of oil to each part of the engine is reduced accordingly. Can be secured.

(Iii) Since the oil supply pipe provided outside the timing gear case is omitted, problems due to defective piping can be eliminated, reliability can be improved, and cost can be reduced.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the arrow A in FIG. 1, and FIG. 3 is a vertical sectional view showing a conventional timer lubricating device. 1 …… Timing gear case, 2 …… Oil sump, 4a ……
Circular hole for timer lubrication, 10 …… Oil passage, 12 …… Oil jet

Claims (1)

[Scope of utility model registration request] 1. An oil sump portion is formed on an inner surface of a front wall of a timing gear case that covers an injection pump gear that drives an injection pump, a timer and a gear train, and that protrudes into a lubricating recess formed in a rotation axis of the timer. The oil sump portion has an upward semicircular arc-shaped cross section, and the timing gear case is formed with an oil passage and an oil jet portion communicating with the oil passage. A timer lubrication device for a diesel engine, which has an opening in a reservoir.