JPH0514527U - Lubrication structure of water pump - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent wear on the sliding surfaces of bearings and oil seals and improve durability. [Structure] A foreign substance reservoir 10 is provided in the middle of an oil passage 9 reaching the bearing 3, and a magnet 11 is disposed at the bottom thereof.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a water pump, and more particularly to a water pump lubrication structure in which its bearings are lubricated using engine oil.

[0002]

[Prior Art]

 Conventionally, as such a water pump, for example, the one described in Japanese Utility Model Laid-Open No. 63-190519 is known.

In this type, an impeller is fixed to one end of a rotary shaft supported by a body, and the rotary shaft is rotated by external power to circulate engine cooling water. The rotating shaft of the water pump is supported by a slide bearing, and a passage is provided to supply the lubricating oil from the oil pump that circulates the lubricating oil to the engine to the bearing portion of the sliding bearing.

[0004]

[Problems to be solved by the device]

 However, in such a conventional water pump, since the passage for supplying the lubricating oil from the oil pump to the bearing is simply a pipe line, it circulates in the engine and contains foreign matter (mainly iron powder etc.). However, there is a problem that the oil is directly supplied to the bearing portion, and the foreign matter enters the sliding surface of the bearing portion or the sliding surface of the oil seal portion to promote wear.

An object of the present invention is to solve the above-mentioned conventional problems, provide a lubricating structure for a water pump that can prevent wear of the sliding surfaces of a bearing portion and an oil seal portion and improve durability. is there.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a water body in which an impeller is fixed to one end of a rotating shaft supported by a body through a bearing, and engine oil is supplied to the bearing through an oil passage. In the pump, a foreign matter reservoir is provided in the middle of the oil passage.

[0007]

[Action]

 According to the present invention, even if engine oil containing foreign matter is supplied to the oil passage, these foreign matter are collected in the foreign matter reservoir provided in the middle of the oil passage, and only clear oil is supplied to the bearing. Will be.

[0008]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

In the figure, reference numeral 1 is a pump body, and 2 is a rotary shaft rotatably supported by the pump body 1 via a bearing 3. A pump impeller 4 is press-fitted and fixed to one end of the rotary shaft 2, and a gear 5 that meshes with a gear fixedly mounted on the crankshaft of the engine is press-fitted and fixed to the other end. A pipe member 6 forming a cooling water passage is attached to the pump body 1, 6A is a suction passage communicating with a radiator, and 6B is a bypass passage. The discharge passage 1A of the pump communicates with a cylinder block (not shown). Further, a mechanical seal 7 is provided between the pump impeller 4 and the pump body 1 as is well known. Further, an oil seal 8 is provided between the bearing 3 and the mechanical seal 7, the lip portion of which is in sliding contact with the rotary shaft 2.

Reference numeral 9 denotes an oil passage which has an inlet portion 9A on an end surface of the pump body 1 and supplies engine oil to the bearing 3. In this embodiment, oil is supplied by utilizing gravity. The layout is adopted.

A foreign matter reservoir 10 is provided in the oil passage 9. As shown in detail in FIG. 2, the foreign matter reservoir 10 has a columnar space 10A that is long in the vertical direction, the inlet side oil passage 9B communicates with the middle abdomen thereof, and the outlet side oil passage 9C communicates with the head. Has been done. Further, a magnet 11 is arranged at the bottom of the cylindrical space 10A.

In this embodiment having the above-described configuration, the pump impeller 4 is rotated via the gear 5 and the rotating shaft 2 in accordance with the rotation of the engine (not shown), and the cooling water is sent to the engine. become. At this time, the engine oil in the oil pan is scraped off by the rotation of a crankshaft (not shown), and a part of the engine oil enters the inlet portion 9A of the oil passage 9. Then, the invading engine oil reaches the foreign matter reservoir 10 through the inlet-side oil passage 9B by the action of gravity, and the foreign matter contained in the engine oil is deposited there. Further, iron-based foreign matter is positively attracted by the magnet 11. Then, the supernatant engine oil from which the foreign matter is removed flows into the bearing 3 from the head of the foreign matter reservoir 10 through the outlet side oil passage 9C.

Next, another embodiment of the present invention shown in FIGS. 3 to 5 will be described.

In this embodiment, the magnet 11 is simply arranged at the bottom of the cylindrical space 10A in the previous embodiment, whereas the through hole 12 penetrating the bottom of the cylindrical space 10A is formed in the pump body 1. Then, the drain plug 13 is screwed into the through hole 12, and the magnet 11 is arranged at the tip of the drain plug 13. By doing so, it is possible to clean and remove the foreign matter deposited and accumulated on the bottom of the cylindrical space 10A of the foreign matter reservoir 10. Further, by disposing the magnet 11 at the tip of the drain plug 13, it is possible to extremely easily remove the iron-based foreign matter.

As yet another embodiment of the present invention, FIG. 6 shows an example in which the above-mentioned iron-based foreign matter removing work can be further simplified.

In this embodiment, at least the outer surface of the drain plug is made of a non-magnetic material such as resin or aluminum. For this purpose, the drain plug 13 has a double structure of an outer cylindrical portion 13A having a bottomed cylindrical shape and a rod-shaped body 13B, and the magnet 11 is provided at the bottom of the tip of the outer cylindrical portion 13A having a bottom. The tip is pressed and held.

However, when the drain plug 13 is normally screwed into the through hole 12 and the tip of the drain plug 13 is exposed to the cylindrical space 10A, the foreign matter of the ferrous material is magnetized around the non-magnetic outer cylindrical portion 13A. It is adsorbed by the magnetic force of 11. When the drain plug 13 is removed in this state and the rod-shaped body 13B is further removed and the magnet 11 is removed, the magnetic force no longer acts on the outer cylindrical portion 13A, so that the iron-based foreign matter can be removed very easily.

It should be noted that the above embodiment has been described with reference to the gravity type oil supply passage, but it goes without saying that the present invention can be similarly applied to the pressure type.

[0019]

[Effect of the device]

 As is clear from the above description, according to the present invention, since the foreign matter reservoir is provided in the middle of the oil supply passage, it is possible to prevent the sliding surfaces of the bearing portion and the oil seal portion from being worn, and to prevent the water pump The durability can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is an enlarged cross-sectional view showing another embodiment of the present invention.

FIG. 4 is a sectional view taken along line XX of FIG.

FIG. 5 is a cross-sectional view showing an example of the drain plug of the embodiment of the present invention.

FIG. 6 is a sectional view showing another example of the drain plug of the embodiment of the present invention.

[Explanation of symbols]

 1 Pump body 2 Rotating shaft 3 Bearing 4 Pump impeller 8 Oil seal 9 Oil passage 10 Foreign matter reservoir 11 Magnet 13 Drain plug

Claims (4)

[Scope of utility model registration request] 1. A water pump in which an impeller is fixed to one end of a rotary shaft supported by a body through a bearing, and engine oil is supplied to the bearing through an oil passage, in the middle of the oil passage. A lubrication structure for a water pump, characterized in that a foreign matter reservoir is provided on the inside. 2. The lubrication structure for a water pump according to claim 1, wherein a magnet is arranged at the bottom of the foreign matter reservoir. 3. The lubrication structure for a water pump according to claim 2, wherein the magnet is provided at a tip of a removable drain plug. 4. The water pump lubrication structure according to claim 3, wherein the drain plug is formed of a non-magnetic material.