JPH0634562Y2 - Oil pump cover structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a cover structure of an oil pump for supplying lubricating oil to a two-cycle engine of a motorcycle, for example.

(Prior Art) In an oil pump that supplies lubricating oil to a two-cycle engine, oil, dust, and the like adhere to the discharge amount adjusting pulley and the exposed inner wire portion of the discharge amount adjusting wire connected to this pulley. In order to prevent this, it is necessary to provide a cover that covers these pulleys and inner wires.

For this reason, conventionally, as shown in FIG. 8, a frame-shaped protruding portion 51 integrally protruding from the crankcase 50 is provided.
Oil pump to crankcase 50 at the position surrounded by
52 is attached, and a cover body 53 is attached to the tip end surface of the protruding portion 51 via a seal (not shown). The crankcase 50, the protruding portion 51 and the cover body 53 allow the discharge amount adjusting pulley 54 and the cable 55 to be adjusted. The structure covers the entire oil pump 52 including the. Reference numeral 56 is an oil tube.

(Problems to be solved by the invention) However, in the above-described conventional structure, the cover including the protrusion 51 and the cover body 53 is large in order to cover the entire oil pump 52, and a large space is required for mounting the oil pump 52. . Especially in the case of motorcycles, the oil pump 52 may be mounted on the wall surface of the stepped portion formed in the light case of the crankcase 50 because of the mounting space. Therefore, there is no room in the space, and it is desired to make the installation space of the oil pump as small as possible. That is, generally, the oil pump is often provided on the clutch cover (light cover), but in the case of a model provided with a mechanical governor or the like and having no space, it may be mounted on the wall surface of the light case as described above. Further, in the conventional structure, since the entire oil pump 52 is covered, the work of mounting the oil pump 52 is troublesome, and there is a disadvantage that workability is poor. That is, it is necessary to insert the oil pump 52 into the narrow space surrounded by the protrusion 51 and bolt it to the crankcase 50, and further, to remove the two oil tubes 56 from the holes of the protrusion 51. , Less flexibility in overall piping. As a prior art, there is, for example, Japanese Utility Model Laid-Open No. 61-12914.

(Means for Solving the Problems) In order to solve the above problems, in the cover structure of the oil pump of the present invention, the discharge amount adjusting shaft of the oil pump penetrates the oil pump mounted on the crankcase or the clutch cover. A plate having a hole is attached to the plate, and a cover body that covers the pulley fitted and fixed to the discharge adjusting shaft and the exposed inner wire portion of the discharge amount adjusting wire connected to the pulley is attached to the plate. It is installed.

(Operation) Since the plate and the cover body cover only the discharge amount adjusting pulley and the inner wire that require dust protection, the entire cover can be downsized to the minimum required size. Therefore, the installation space for the oil pump is small, and the installation position can be selected relatively freely. Further, unlike the conventional case, it is not necessary to insert the oil pump into the protrusion of the crankcase or the clutch cover to perform the mounting work, and further, it is not necessary to pass the oil tube through the hole of the protrusion.
Workability of installation work is improved.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

FIG. 1 is a front view of the cover body 1, FIG. 2 is a side view of the same, and FIG.
The figure is a rear view of the same, and this cover body 1 has a shell-like shape composed of a flat surface portion 1a and a protruding portion 1b protruding rearward from the outer peripheral edge of the flat surface portion 1a, and is entirely formed integrally of synthetic resin or the like. I'm standing. The cover body 1 has bolt holes 2a, 2b formed at one end upper end and the other end lower end, through which bolts (not shown) for fixing the cover body 1 to a plate described later penetrate. A notch 3 is formed in the protruding portion 1b at the other end of the body 1. A groove 4 into which a bent portion of a plate described later is fitted is formed on the back surface of the other end of the cover body 1, and the cutout portion 3 is covered by the bent portion of the plate.

FIG. 4 is a front view of the plate 6, and FIG. 5 is a side view thereof. The plate 6 is made of a pressed metal plate, and the front shape is almost the same as the front shape of the cover body 1 shown in FIG. Is. The plate 6 is formed with a hole 7 through which a discharge amount adjusting shaft of an oil pump, which will be described later, penetrates, and bolt holes 2a, 2b (first holes) of the cover body 1 are formed at one end upper end and the other end lower end. Screw holes 8a and 8b into which bolts (not shown) that penetrate through (Figs. 1 and 3) are screwed are provided. Plate 6
A bolt hole 9 through which a bolt (not shown) for fixing the plate 6 to an oil pump to be described later penetrates is formed in the hole. The other end of the plate 6 is bent at a substantially right angle to form a bent portion. 10 are configured. This bent portion 10 is the cover body 1
Fit in the groove 4 (Figs. 1, 2 and 3) of the notch 3 (Fig.
(Fig.) To cover the outer wire 11 and inner wire
Outer wire 11 of wire 13 for adjusting discharge rate
A screw hole 14 for fixing the is screwed.

FIG. 6 is a front view of the oil pump 16, and FIG. 7 is a side view of the oil pump 16. The oil pump 16 is driven by the power of the engine through a gear 18 fitted and fixed to a drive shaft 17 to adjust the discharge amount. By rotating the shaft 19, the discharge amount can be adjusted. A fan-shaped pulley 20 is fitted and fixed to the discharge amount adjusting shaft 19, and the inner wire 12 of the discharge amount adjusting wire 13 is connected to the pulley 20. The inner wire 12 is interlocked with the accelerator, so that the discharge amount of the oil pump 16 changes according to the accelerator opening.
Reference numerals 21, 22 are oil tubes connected to the suction port and the discharge port of the oil pump 16. A mounting seat 23 is integrally formed on the back surface of the oil pump 16, and bolt holes 24a and 24b are formed at both ends of the mounting seat 23. Bolts (not shown) passing through these bolt holes 24a, 24b are screwed into screw holes (not shown) of the crankcase 25, and the oil pump 16 is fixed to the crankcase 25 by these bolts. There is.

With the plate 6 (Figs. 4 and 5) attached to the oil pump 16 and the cover body 1 attached to the plate 6,
As indicated by phantom lines in FIGS. 6 and 7, the pulley
20 and the exposed portion of the inner wire 12 of the discharge amount adjusting wire 13 are covered by the cover body 1 and the plate 6.

Next, the operation will be described. While the engine is rotating, the oil pump 16 is driven via the gear 18 by the driving force of the engine,
Lubricating oil is supplied to the engine. Then, the discharge amount adjusting shaft 19 is rotated by the discharge amount adjusting wire 13 linked with the accelerator via the pulley 20, and the discharge amount of the oil pump 16 is adjusted according to the accelerator opening.

By the way, the exposed portion of the inner wire 12 of the pulley 20 and the discharge amount adjusting wire 13 is covered by the cover body 1 and the plate 6.
Is covered by the pulley 20 and inner wire 12
It is possible to favorably prevent oil, dust, etc. from adhering to the. Also,
Inner wire of pulley 20 and discharge rate adjustment wire 13
Since it covers only the 12 exposed parts, the cover consisting of the cover body 1 and the plate 6 can be downsized to the minimum required size, and at the same time it interferes with the installation of the oil pump 16 on the crankcase 25. The workability of installation work is improved. This is extremely effective in a motorcycle in which various devices are densely arranged and there is almost no space available. When the oil pump 16 is removed for replacement in a race or the like, the cover body 1 and the plate 6 can be removed integrally with the oil pump 16 by simply removing the oil pump 16 from the crankcase 25. You can save the trouble of removing the plate and plate 6 separately. It is not necessary to change the structure of the oil pump 16, and there is an effect that the oil pump 16 having the conventional structure can be used as it is by only changing the plate 6 and the cover body 1.

(Other Embodiments) In the above embodiments, an example in which the oil pump 16 is attached to the crankcase 25 has been described, but the present invention is not limited to such a configuration, and the oil pump 16 can be used as a clutch cover. May be attached.

Further, in the above embodiment, the outer wire 11 of the discharge amount adjusting wire 13 is fixed to the bent portion 10 of the plate 6, but the present invention is not limited to such a configuration, Instead of providing the bent portion 10, a protruding portion may be provided on the oil pump 16 and the outer wire 11 of the discharge amount adjusting wire 13 may be fixed to the protruding portion.

(Effect of the Invention) As described above, according to the present invention, a plate having a hole through which the discharge amount adjusting shaft of the oil pump penetrates is attached to the oil pump attached to the crankcase or the clutch cover, A cover body that covers the pulley fixedly fitted to the discharge amount adjusting shaft and the exposed inner wire portion of the discharge amount adjusting wire connected to the pulley is attached to this plate to adjust the discharge amount that requires dust prevention. Since the pulley and the inner wire are covered with the plate and the cover body, the entire cover can be downsized to the minimum required size. Therefore, the installation space for the oil pump is small, and the installation position can be selected relatively freely. This is extremely effective in a motorcycle in which various devices are arranged in high density and there is almost no space in terms of space. Further, unlike the conventional case, it is not necessary to insert the oil pump into the protruding portion of the crankcase or the clutch cover to perform the mounting work, and it is not necessary to pass the oil tube through the hole of the protruding portion. Can be improved. Also, at the time of race etc.
When removing the oil pump, it is possible to remove the cover body and the plate together with the oil pump simply by removing the oil pump from the crankcase or the clutch cover, and it is possible to save the trouble of separately removing the cover body and the plate. Further, the conventional oil pump can be used as it is without changing the structure of the oil pump itself.

[Brief description of drawings]

FIG. 1 is a front view of the cover body, FIG. 2 is a side view of the same, FIG. 3 is a rear view of the same, FIG. 4 is a front view of a plate, FIG. 5 is a same side view, and FIG. 6 is an oil pump. A front view, FIG. 7 is a side view of the same, and FIG. 8 is a schematic sectional view of a conventional oil pump cover structure. 1 ... Cover body, 6 ... Plate, 7 ... Hole, 12 ... Inner wire, 13 ... Discharge rate adjusting wire, 16 ... Oil pump, 19 ... Discharge rate adjusting shaft, 20 ... Pulley, twenty five……
Crankcase

Claims (1)

[Scope of utility model registration request] 1. An oil pump mounted on a crankcase or a clutch cover is provided with a plate having a hole through which a discharge amount adjusting shaft of the oil pump penetrates, and the plate is fitted to the discharge amount adjusting shaft. A cover structure for an oil pump, characterized in that a cover body is attached to cover the fixed and fixed pulley and the exposed inner wire portion of the discharge amount adjusting wire connected to the pulley.