JP2531531Y2 - engine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an engine used for, for example, an on-vehicle refrigerator unit, and particularly, it is difficult for oil tightness of a joint surface between a crankcase and an oil pan to be impaired. Related to the engine.

[Conventional technology]

For example, an on-vehicle refrigerator unit is configured so that the oil exchange cycle can be set to be very long by increasing the capacity of an engine oil pan in order to achieve maintenance-free operation. In this type of engine, in order to simplify the support structure of the engine, an engine support structure in which an oil pan is formed wider than a crankcase and the oil pan is supported on an engine bed or a frame may be adopted.

[Problems to be solved by the invention]

In the on-vehicle refrigerator unit, for example, as shown in FIG. 3, the engine 1, the compressor 12 and the condenser cooling fan motor 14 are linked and connected by V-belts 15 and 16, and the V shaft is connected to the output shaft of the engine 1. Belts 15 and 16
In many cases, the tension is applied. When the above-described engine support structure is employed in such an engine 1, the tension of the V-belts 5 and 16 acts on one side of the crankcase so as to lift the crankcase from the oil pan. A problem arises that the oil tightness of the joint surface between the oil pan and the oil pan is easily impaired.

The present invention has been made in consideration of the above circumstances, and has as its object to provide an engine in which oil tightness of a joint surface between a crankcase and an oil pan is hardly impaired. is there.

[Means for solving the problem]

In the present invention, for example, as shown in FIG. 1, a rear plate 7 is disposed on the rear side of the crankcase 2 and the oil pan 3, and the rear plate 7 is fixed to the rear side of the crankcase 2. In the engine supported by the frame 4 via the oil pan 3 fixed to the lower side,
The rear surface of the crankcase 2 and the oil pan 3 are formed flush with each other, and the lower portion of the rear plate 7 is fixed to the rear surface of the oil pan 3.

[Action]

The engine 1 according to the present invention is based on the premise that the oil pan 3 is supported by the frame 4, and the rear sides of the crankcase 2 and the oil pan 3 are connected by a rear plate 7. As a result, the crankcase 2 and the oil pan 3 are connected by both the rear plate 7 and the bolt 20 connecting the both.

Now, assuming that the engine 1 is mounted on an in-vehicle refrigerator unit as shown in FIG.
In FIG. 2, an external force that tries to separate the crankcase 2 from the oil pan 3, that is, such an external force moment acts on the joint between the left crankcase 2 and the oil pan 3 in FIG.

However, in the present invention, since the crankcase 2 and the oil pan 3 are connected by both the rear plate 7 and the bolt 20, each of them shares a resistance force against an external force that tries to separate the crankcase 2 from the oil pan 3.

For this reason, the crankcase 2 and the oil pan 3
Since the load of the bolt 20 for joining the two is reduced, it is difficult for the joint surface of both to be opened.

〔Example〕

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

FIG. 3 is a plan view of a main part of the vehicle-mounted refrigerator unit equipped with the engine according to one embodiment of the present invention. In the refrigerator unit 10, the engine 1 according to the embodiment of the present invention is provided on one side of the rectangular frame 4, the compressor 12 is provided on the center, and the condenser 13 and the condenser cooling fan motor 14 are provided on the other side. The engine 1, the compressor 12 and the fan motor 14 are linked by V-belts 15 and 16, respectively.

FIG. 1 is a side view of an engine according to an embodiment of the present invention, and FIG. 2 is a front view thereof.

The engine 1 is supported on a frame 4 via an oil pan 3 fixed to a lower side of a crankcase 2. Here, the oil pan 3 is formed wider than the crankcase 2, and a pair of horizontal flanges 8 are provided on the left and right of the upper portion of the oil pan 3 so as to protrude.
The engine 1 is fixed to the frame 4 with support bolts 17 inserted therethrough. Oil pan 3 and crankcase 2
Are connected to each other by a bolt 20 that penetrates through the oil pan 3 and is screwed to a lower peripheral portion of the crankcase 2.

Further, a flywheel 5 and a pulley 6 (shown in FIG. 3) for taking out output are provided on the rear side of the crankcase 2.
A rear plate 7 that covers the front surface of the flywheel 5 is disposed.

The rear end face of the oil pan 3 is formed to bulge to a position flush with the rear end face of the crankcase 2, and the rear plate 7 is brought into close contact with the rear end face of the oil pan 3 and the rear end face of the crankcase 2. 8, the oil pan 3 is fixed to the rear end face of the oil pan 3 and the rear end face of the crankcase 2.

Further, in this embodiment, the load of the bolt 20 for joining the crankcase 2 and the oil pan 3 is further reduced, and the reinforcing stay 18 is provided so that the joint surface between the crankcase 2 and the oil pan 3 is more difficult to open. By crankcase 2
And the oil pan 3 are connected. That is, one end of the reinforcing case 18 is fastened together with the horizontal flange 8 by the support bolt 17, and the other end is fixed to the crankshaft height of the crankcase 2 by the bolt 19.

In this embodiment, as shown in FIG.
The lubricating device is provided with a full flow filter 22 for filtering the entire amount of oil discharged from the oil pump 21 and a bypass filter 23 for filtering a part of the oil that has bypassed the lubricating portion. Instead of returning to the oil pan 3, the oil is supplied to a portion where it is difficult to supply oil, such as the camshaft 24, an oil seal portion, a piston portion, or the like, and the portion is lubricated and cooled.
In this case, the number of branches from the main gallery 25 can be reduced to reduce a decrease in the hydraulic pressure of the main gallery, and the lubrication and cooling efficiency of a portion where lubrication is difficult can be increased, which is advantageous.

The engine 1 of the refrigerator unit 10 has one side (in the figure,
V to pull the engine 1 from the left side to the other side
The tension of the belt 15 acts. Therefore, in FIG. 2, at the junction between the left crankcase 2 and the oil pan 3,
A force acts to separate the crankcase 2 from the oil pan 3. However, since the crankcase 2 and the oil pan 3 are connected via the rear plate 7 and the reinforcement stay 18, a force acting in a direction in which the crankcase 2 is separated from the oil pan 3 is applied to the rear plate 7 and the reinforcement stay 18. The crankcase 2 and the oil pan 3
The load on the bolts 20 connecting the first and the second is very light. As a result, the crankcase 2 and the oil pan 3 are hardly separated from each other, and the oil-tightness of the joint surface between the crankcase 2 and the oil pan 3 is hardly impaired. In addition, since the oil-tightness of the joint surface between the crankcase 2 and the oil pan 3 is ensured by using the conventionally provided rear plate 7, the configuration is simple, inexpensive, and easy to implement.

[Effect of the invention]

As described above, according to the present invention, since the crankcase and the oil pan are connected by both the rear plate and the bolt, for example, when the engine of the present invention is mounted on a vehicle-mounted refrigerator unit, Even in a usage situation where an external force acts to separate the case from the oil pan, both the rear plate and the bolt share the resistance to this force, so the crankcase and the oil pan are connected accordingly. The load on the bolts to be applied is small.

For this reason, the joint surface between the crankcase and the oil pan becomes difficult to open, and the oil tightness of the joint surface is maintained, so that oil leakage from the joint surface can be prevented.

In addition, since such a rear plate is conventionally used for this type of engine, it is not necessary to provide a new joining reinforcing tool. Therefore, there are advantages that the structure is simple, the weight can be reduced, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view of an engine according to an embodiment of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is an essential part of a vehicle-mounted refrigerator unit equipped with an engine according to an embodiment of the present invention. It is a top view. 1 ... engine, 2 ... crankcase, 3 ... oil pan, 4 ... frame, 7 ... rear plate.

Claims (1)

(57) [Scope of request for utility model registration] 1. A rear plate (7) is disposed on the rear side of a crankcase (2) and an oil pan (3), and an upper portion of the rear plate (7) is fixed to a rear side surface of the crankcase (2). In an engine supported on a frame (4) via an oil pan (3) fixed to a lower side of a crankcase (2), the rear surfaces of the crankcase (2) and the oil pan (3) are formed flush. An engine wherein the lower portion of the rear plate (7) is fixed to the rear side of the oil pan (3).