JPH022153Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a lubricating oil supply device that supplies lubricating oil to a vacuum pump driven by a fan belt of an engine.

[Conventional technology]

Conventionally, vehicles equipped with diesel engines equipped with a vacuum booster have been equipped with a vacuum pump that generates negative pressure, which is generally attached to the generator and driven by a fan belt. ing. Since the lubricating oil used in this vacuum pump is the lubricating oil of the engine, the respective lubricating oil passages are connected to each other by external oil pipes.

By the way, when adjusting or replacing the fan belt, it is necessary to move the attachment position of the pulley in order to loosen the fan belt. Therefore, the oil pipe that connects the engine and the vacuum pump is required to be flexible, and so far, rubber hoses have been mainly used.

[The problem that the idea attempts to solve]

However, when a rubber hose is used as an oil pipe, the rubber hose deteriorates over time, and if the surrounding temperature of the rubber hose or lubricating oil temperature is high, the deterioration of the rubber is accelerated, and oil leaks occur early due to vibrations. be.

By the way, if a metal pipe is used instead of the rubber hose, the disadvantages of the rubber hose can be overcome, but in that case, in order to move the vacuum pump, the metal pipe needs to be movably attached using a joint. . However, such a joint has a problem in that it cannot follow the movement of the vacuum pump due to its rigid body.

The present invention was developed to solve the above problem, and uses a metal pipe that is resistant to high temperatures, vibrations, and shocks for the oil pipe that supplies lubricating oil from the engine to the vacuum pump. The purpose of the present invention is to provide a lubricating oil supply device for a vacuum pump that allows adjustment and replacement of the fan belt while the fan belt is attached.

[Means to solve the problem]

The configuration of the vacuum pump lubricating oil supply device of the present invention to achieve the above object is to fix a bolt to the side of the engine, and pivot the vacuum pump around the bolt so as to be able to swing freely. Furthermore, a metal oscillating oil pipe is provided between the vacuum pump and the bolt, and a fixed metal oil pipe is fixed between the engine and the bolt, and both metal oil pipes are fixed. When fitted with a bolt, lubricating oil flows between both metal oil pipes, and by loosening the nut at the other end of the bolt, the vacuum pump and the metal oscillating oil pipe can be oscillatedly fixed. I made it.

〔Example〕

Hereinafter, the present invention will be explained in detail by way of an embodiment with reference to the drawings.

FIG. 1 is a schematic side view of the lubricating oil supply device 1 of the vacuum pump 6 of this embodiment attached to the engine 2. Vacuum pump 6 in the figure
The rotating shaft is attached coaxially with the generator 3, and the bracket 3a attached to the generator 3
and the lubricating oil supply device 1 are fitted onto a bolt 4, and the bolt 4 is connected to a stay 10 fixed to the side of the engine 2.
It is attached to the side of engine 2 by being attached to the shaft. Therefore, although the lubricating oil supply device 1 and the vacuum pump 6 can swing around the bolts 4, they are always in a fixed state. A vacuum pump 6 is integrally attached to the rear of the generator 3.
It is designed to be driven by a fan belt 7 via a generator 3.

The lubricating oil supply device 1 of this embodiment that supplies lubricating oil to the vacuum pump 6 installed in this manner includes a metal (steel) swinging oil pipe 1a whose one end is attached to the vacuum pump 6. ,
It is composed of two pipes, one end of which is attached to the main body of the engine 2, and a fixed oil pipe 1b made of metal as well.The other end of each is attached to a bolt 4 that is the mounting shaft of the generator 3, and the other end is attached to the inside of the engine 2. It is connected to a joint 9 having an oil passage. The mounting shaft of the generator 3 and the joint 9 consists of a bolt 4 which is threaded only at the tip 4a (on the side opposite to the joint 9), and is tightened with a nut 5 to attach the generator 3.
The metal swinging oil pipe 1a is always fixed. Note that the metal swinging oil pipe 1a
is connected to the internal lubricating oil passage from the rotating shaft end of the vacuum pump 6, but is not limited thereto, and may be connected to the lubricating oil passage at any other suitable location of the vacuum pump 6.

FIG. 2 is a view taken along arrow A shown in FIG. 1 to show the structure of the metal swinging oil pipe 1a and the metal fixed oil pipe 1b of this embodiment. In the figure, a generator 3 is supported by a bracket 3a, attached to the side of the engine 2 via a stay 10 that supports bolts 4 to which the bracket 3a is attached, and a vacuum pump 6 and a metal swinging oil pipe 1a. is designed to be able to swing together with the generator 3 in the direction of the arrow in the figure.

FIG. 3 is a sectional view of the joint portion of both the oil pipes 1a and 1b. The metal fixed oil pipe 1b is connected to the oil passage 9c of one fixed side joint member 9b, and the metal swinging oil pipe 1a is a swinging side joint that rotates the bolt 4. It is connected to the swing-side joint member 9a so as to communicate with an oil passage 9e within the member 9a, and the oil passage 9e communicates with an oil passage 9c. Note that 8 is an O-ring for preventing oil leakage from the communication portion between the oil passage 9c and the oil passage 9e. The swing-side joint member 9a configured as described above is swingably attached and fixed to the stay 10 together with the bracket 3a of the generator 3 by bolts 4.

As described above, in this embodiment, the lubricating oil pipe leading to the vacuum pump 6 which is integrally attached to the generator 3 is made of metal, and the swinging side joint member 9a and the fixed side joint member 9b are used. Therefore, when adjusting or replacing the tension of the fan belt 7, first loosen the nut 5 at the end of the bolt 4, and when the generator 3 is swung around the bolt 4, the metal on the oscillating side The pipe 1a can follow this and similarly swing.

[Effect of idea]

The vacuum pump lubricating oil supply device of the present invention described above can provide the following effects.

By simply loosening the nut of the bolt that secures the vacuum pump to the engine, the tightening of the joint member can be loosened, and the vacuum pump can be oscillated with the metal swing oil pipe attached. Therefore, it is possible to improve work efficiency when adjusting the slackness of the fan belt, replacing it, etc.

Since the oscillating oil pipe is a metal pipe and the movable joint member can be fixed, it is possible to prevent damage such as engine vibrations and the risk of oil leakage. Moreover, since the nut fixes the vacuum pump and the movable joint member at the same time, it is possible to never forget to fix the joint member, prevent damage caused by engine vibration, and prevent oil leakage. There is no risk of it happening.

The metal pipe used for the lubricating oil passage has high mechanical and thermal strength and will not deteriorate due to oil. Moreover, unlike conventional rubber oil pipes, there is no need to periodically replace them, so they can be used for a long period of time. The metal swinging oil pipe can also be used as a support for a vacuum pump.

As described above, the present invention can provide a highly reliable lubricating oil supply device for a vacuum pump.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of the lubricating oil supply device and engine front of the vacuum pump of the present invention according to one embodiment, FIG. 2 is a view taken in the direction of arrow A in FIG. 1, and FIG. It is a sectional view of the joint member of both oil pipes. DESCRIPTION OF SYMBOLS 1... Lubricating oil supply device, 1a... Metal swinging oil pipe, 1b... Metal fixed oil pipe, 2... Engine, 3... Generator, 4... Bolt, 5... Nut, 6... Vacuum pump, 7
... Fan belt, 9 ... Joint, 9a ... Swinging side joint member, 9b ... Fixed side joint member.

Claims (1)

[Scope of utility model registration request] A bolt is fixed to the side of the engine, a vacuum pump is swingably supported around the bolt, and a metal swinging oil pipe is provided between the vacuum pump and the bolt. On the other hand, a fixed metal oil pipe is fixedly installed between the engine and the bolt, and the lubricating oil is configured to flow between the two metal oil pipes by fitting the two metal oil pipes to the bolt, A lubricating oil supply device for a vacuum pump, in which the vacuum pump and a metal swinging oil pipe can be swingably fixed by loosening a nut at the other end of the bolt.