JPH0330582Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a cooling water pump for a cylinder block in a water-cooled internal combustion engine, and a portion of the cylinder block constitutes a pump casing of the cooling water pump. This invention relates to an installation device for a cooling water pump installed in this manner.

[Conventional technology]

As described above, mounting a cooling water pump on a cylinder block of a water-cooled internal combustion engine in such a way that a part of the cylinder block constitutes a pump casing of the cooling water pump is known as a prior art. −57525
It is disclosed in the publication No.

That is, the above-mentioned publication discloses that a relatively large-diameter hole is bored in the cylinder block, and the impeller of the cooling water pump is inserted into the cooling water jacket through this hole, while the impeller is flange-bonded to the cylinder block so as to close the hole. It is proposed that the impeller be pivotally supported on the cover plate and that a cooling water suction passage be formed in the cover plate.

[The problem that the idea aims to solve]

However, forming a cooling water suction passage in the cover plate that supports the impeller and is flanged to the cylinder block, as described in the above-mentioned publication, creates problems between the impeller and its bearing. In addition, since a space must be provided to guide the cooling water from the cooling water intake passage to the center of the impeller, the length of the pump shaft becomes longer by the space, resulting in an increase in the size of the cooling water pump. Moreover, since the area of the flange joint of the cover plate to the cylinder block is increased by the area surrounding the cooling water suction passage,
Because it is necessary to increase the number of bolts to attach the cover plate to the cylinder block,
Coupled with the increase in size of the cooling water pump, the installation space and weight have increased significantly.

The object of the present invention is to solve the above-mentioned problems when the cover plate, which pivotally supports the impeller of the cooling water pump, is flange-jointed to the cylinder block.

[Means to solve the problem]

To achieve this object, the present invention provides a cooling water pump mounting device in which a cover plate, which pivotally supports an impeller in a cooling water pump, is flange-bonded to one side of a cylinder block. A spiral chamber surrounding the periphery is formed in a concave manner, and inside this spiral chamber,
The impeller is inserted so that the cover plate is formed into a substantially flat plate, and the cylinder block has a cooling water intake for guiding cooling water from the radiator to the center of the impeller located in the swirl chamber. The passage is integrally formed, and the terminal end of the swirling chamber in the swirling direction is configured to form a discharge port communicating with the cooling water jacket in the cylinder block.

[Functions and effects of the idea]

In this configuration, the cooling water from the radiator reaches the center of the impeller from the suction passage, is blown out into the surrounding swirl chamber by the rotation of the impeller, and then flows from the discharge port at the end of the swirl chamber. It is supplied into the cooling water jacket in the cylinder block.

In this case, a cooling water intake passage for guiding cooling water from the radiator to the center of the impeller;
And by forming the discharge port from the swirl chamber to the cooling water jacket in the cylinder block on the cylinder block side, the cooling water is not directed to the center of the impeller between the impeller and its bearing as in the prior art. Since there is no need to provide a space for guiding the impeller, the distance between the impeller and its bearing in the cooling water pump is shortened, and the length of the pump shaft can be shortened, thereby making the cooling water pump more compact. I can do it.

In addition, the impeller of the cooling water pump is inserted into a spiral chamber recessed in the cylinder block, and the cover plate of the cooling water pump is formed into a substantially flat plate, so that the cooling water pump does not protrude from the cylinder block. Dimensions can be shortened.

Furthermore, a cooling water intake passage for guiding cooling water from the radiator to the center of the impeller;
By forming the discharge port from the swirl chamber to the cooling water jacket in the cylinder block on the cylinder block side, the flange joint of the cover plate to the cylinder block in the cooling water pump can be connected to the cooling water intake as in the prior art. There is no need to enclose the area around the passage, and it was opened in 1972.
As described in Publication No. 145503, there is no need to surround the discharge passage that communicates the volute chamber with the cooling water jacket in the cylinder block, and it is only necessary to surround the periphery of the vortex chamber.
The joint area can be reduced, and the number of bolts for attaching the cover plate to the cylinder block can be reduced.

Therefore, according to the present invention, the cooling water pump can be made smaller, the protrusion of the cooling water pump from the cylinder block can be reduced, the flange joint area of the cover plate to the cylinder block can be reduced, and the number of mounting bolts can be reduced. The four things that can be reduced together have the effect of reliably reducing the increase in the mounting space and weight of the cooling water pump to the cylinder block.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 indicates a cylinder block having a cooling water jacket 3 formed around a cylinder bore 2, and reference numeral 4 indicates a cylinder block formed on one side 1a of the cylinder block 1. Each of the cooling water pumps installed is shown, and the cooling water pump 4 has a cover plate 5 and a cover plate 5.
The pump shaft 6 is supported by penetrating the pump shaft 6, the impeller 7 is fitted into the protrusion of the pump shaft 6 from the cover plate 5, and the pulley 8 is fitted onto the other end of the pump shaft 6. It is structured as follows.

The cover plate 5 of the cooling water pump 4 is formed into a substantially flat plate, and is flanged to a mounting seat 9 integrally formed on one side surface 1a of the cylinder block 1 with a plurality of bolts 10. A gasket 11 for sealing is inserted into the joint surface between the cover plate 5 and the mounting seat 9.

A spiral chamber 12 surrounding the impeller 7 is formed in the mounting seat 9 of the cylinder block 1, and the impeller 7 of the cooling water pump 4 is inserted into the spiral chamber 12. On the other hand, the cylinder block 1
, there is a cooling water intake passage 1 extending into the center of the impeller 7 located in the swirl chamber 12.
3 is integrally formed, and this cooling water intake passage 13
A cooling water pipe 14 from a lower tank in a radiator (not shown) is connected to the cylinder block 1, and the end of the swirling direction of the swirling chamber 12 is connected to the cooling water jacket 3 in the cylinder block 1. Communicating outlet 1
form 5.

In this configuration, cooling water from the lower tank of the radiator flows into the cooling water intake passage 13 via the cooling water pipe 14, and is blown out into the swirl chamber 12 around it by rotation of the impeller 7 in the cooling water pump 4. After that, it is supplied from the discharge port 15 at the end of the swirl chamber 12 into the cooling water jacket 3 in the cylinder block 1, and from the cooling water jacket 3 to the radiator via the cooling water jacket in the cylinder head (not shown). The cycle of returning to the upper tank is repeated.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan sectional view of the main part, and FIG. 2 is a sectional view taken from the side of FIG. 1. 1... Cylinder block, 2... Cylinder bore, 3... Cooling water jacket, 4... Cooling water pump, 5... Cover plate, 6... Pump shaft, 7... Impeller, 8... Pulley, 9... Mounting seat, 10...
Bolt, 11...Gasket, 12...Vortex chamber, 13...Cooling water intake passage, 15...Discharge port.

Claims (1)

[Scope of utility model registration request] A cooling water pump mounting device comprising a cover plate that pivotally supports an impeller in a cooling water pump, which is flanged to one side of a cylinder block, and the cylinder block has a swirl chamber surrounding the impeller. A recess is formed and the impeller is inserted into the volute chamber to form the cover plate into a substantially flat plate, while the cylinder block is provided with cooling water from the radiator into the central part of the impeller located within the volute chamber. An internal combustion engine characterized in that an intake passage for cooling water is integrally formed so as to lead the cooling water to the cylinder block, and a discharge port is formed that communicates a terminal end in the spiral direction of the spiral chamber with a cooling water jacket in the cylinder block. Cooling water pump installation device.