JPH07119482A - Auxiliary machine driving device for vehicle - Google Patents

Abstract

PURPOSE:To facilitate regulation of the belt tension of each tension pulley from a position above an engine by a method wherein tension pulleys arranged to respective auxiliary machines are rotatably mounted on a single bracket, and the bracket is installed to a portion above an engine body. CONSTITUTION:A pulley 5 for a freezer is fixed on the rotary shaft of a compressor 2 for a freezer and a pulley 6 for a cooler on the rotary shaft of a compressor 3 for a carburetor cooler. A tension pulley 7 for a freezer and a tension pulley 8 for a cooler are provided. The pulleys are driven through a belt 9 for a freezer and a belt 10 for a cooler by means of a crank pulley 4. The tension pulleys 7 and 8 are rotatably supported to a bracket 11 fixed to a portion above an engine body 1. By mounting a belt tension regulating mechanism on the tension pulleys 7 and 8, a belt tension regulating work is easily carried out from a position above the engine without being interfered with other part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary machine drive device for driving two or more kinds of auxiliary machines by a belt by an engine crankshaft, such as driving a compressor for a cab cooler in a refrigerated container vehicle and a compressor for a refrigeration machine of a refrigeration system. Regarding

[0002]

2. Description of the Related Art In a refrigerating container vehicle, a compressor for a refrigerating machine and a compressor for a cab cooler of a refrigerating system are simultaneously belt driven by a crank pulley attached to a crankshaft of an engine. FIG. 4 shows a view of a main part of an auxiliary machine drive system for a refrigerated container vehicle of this type viewed from the front side of the engine.

In the figure, 1 is an engine body, 2 is a compressor for a refrigerating machine of a refrigeration system, 3 is a compressor for a cab cooler, and 4 is a crank pulley which is fixed to a crank shaft of an engine and is rotationally driven by the crank shaft.
Reference numeral 5 is a refrigerator pulley fixed to the rotation shaft of the refrigerator compressor, 6 is a cooler pulley fixed to the rotation shaft of the cab cooler, 7 is a tension pulley for the refrigerator, and 8 is a tension pulley for the cab cooler. .

The refrigerator pulley 5 is rotatably driven by the crank pulley 4 via a refrigerator belt 9 installed between the refrigerator pulley 5 and the tension pulley 7, and the cab cooler pulley 6 is It is rotatably driven by the crank pulley 4 via a cooler belt 10 that is installed between the crank pulley 4 and the tension pulley 8.

The refrigerator tension pulley 7 is shown in FIG.
As shown in FIG. 3, the bracket is attached to the upper left side of the engine, that is, the lower right side of the cooler pulley 6, by a dedicated bracket (not shown) fixed to the engine body 1. The cooler tension pulley 8 is supported by a dedicated bracket (not shown) at the lower right position on the opposite side to the refrigerator pulley with respect to the crankshaft of the engine.

[0006]

In the compressor (auxiliary equipment) drive device as described above, the tension pulley 7,
Operate the adjusting mechanism attached to the belts 9 and 10
It is necessary to adjust the tension of the above and constantly transmit the driving force from the crankshaft efficiently to the compressor 2 for the refrigerator and the compressor 3 for the cab cooler.

In the conventional compressor drive device for an automobile engine shown in FIG. 4, in order to operate the belt tension adjusting mechanism of the tension pulleys 7 and 8, it is necessary to open the hood of the vehicle and work from above the engine. However, since the cab cooler tension pulley 8 is installed in the lower half of the engine, the work space is small and the adjustment work is difficult. Further, the two tension pulleys 7 and 8 are arranged at distant positions, so the adjustment work Took a lot of time.

Further, since a dedicated mounting bracket is provided for each of the two tension pulleys 7 and 8, the number of parts is increased and the product cost is increased.

Accordingly, an object of the present invention is to provide an auxiliary machine drive device which can easily adjust the belt tension of a tension pulley, has high maintainability, and has a reduced product cost.

[0010]

In order to solve the above-mentioned problems, the present invention rotatably mounts a tension pulley provided for each auxiliary machine on one bracket, and installs the bracket at an upper part of the engine body. In addition, the belt tension of each tension pulley can be adjusted from above the engine.

[0011]

As described above, in the automobile engine, in order to operate the belt tension adjusting device provided with the tension pulley of the auxiliary device driving device such as the compressor for the refrigerator or the cooler, the bonnet of the vehicle is opened and the upper part of the engine is opened. However, the area around the engine is narrow and the work efficiency is generally poor.

According to the present invention, since a plurality of tension pulleys are installed in the upper part of the engine, and one bracket is provided with these tension pulleys, the plurality of tension pulleys are arranged in the close vicinity. Easy to maintain and improve maintainability.

Also, since the tension pulleys are mounted together on one bracket, the structure is simplified,
Manufacturing costs are also reduced.

Further, it becomes possible to mount the two tension pulleys substantially symmetrically to the vertical line including the crankshaft center, and the horizontal component force of the belt tension applied to the tension pulleys is canceled out. Unreasonable force is not applied.

[0015]

Embodiments of the present invention will now be illustratively described in detail with reference to the drawings. However, unless otherwise specified, the dimensions, materials, shapes, relative positions, etc. of the structural components described in this embodiment are not intended to limit the scope of the present invention thereto, but are merely illustrative examples. Nothing more than.

FIG. 1 is a front front view of an engine for an automobile, that is, a refrigerated container vehicle, equipped with the refrigeration equipment according to the present invention. In the figure, 1 is an engine body, 2 is a compressor for a refrigerating machine of a refrigeration system, and 3 is a cab cooler. The compressor 4 is a crank pulley fixed to the front end of the crankshaft of the engine and rotationally driven by the crankshaft.

Reference numeral 5 is a refrigerator pulley fixed to the rotary shaft of the refrigerator compressor 2, 6 is a cooler pulley fixed to the rotary shaft of the cab cooler 3, 7 is a refrigerator tension pulley, and 8 is a refrigerator pulley. This is a tension pulley for coolers.

The refrigerator pulley 5 is rotationally driven by the crank pulley 4 via a refrigerator belt 9 installed between the refrigerator pulley 5, the refrigerator tension pulley 7 and the clamp pulley 4. The cooler pulley 6 is rotatably driven by the crank pulley 4 via a cooler belt 10 which is installed between the cooler pulley 6 and the cooler tension pulley 8 and the crank pulley 4.

As shown in FIG. 2, the refrigerator tension pulley 7 and the cooler tension pulley 8 are rotatably supported in proximity to one bracket 11 fixed to the upper portion of the engine body.

That is, FIG. 2 shows the details of the attachment mechanism of the two tension pulleys 7 and 8 to the bracket 11, in which the plate-shaped bracket 11 has two elongated holes 11a,
Refrigerator tension pulley 7 is attached to slot 11a, and cooler tension pulley 8 is attached to slot 11b so that slot 11a and 11b can move. The bracket 11 has a bolt hole 11c.
It is fixed to the engine body 1 by a mounting bolt inserted therein.

FIG. 3 shows the attachment of the tension pulleys 7 and 8 to the bracket 11 and the belt tension adjusting mechanism 100.
Shows the details of. In the figure, 100 is a belt tension adjusting mechanism, 101 is an adjusting shaft of the adjusting mechanism 100 slidably fitted in the long hole 11b (11a), 102 is a sleeve fitted to the outer circumference of the shaft, and 103 is The tension pulley 8 (7) is a bearing, and is rotatably supported by the adjusting shaft 101 and the sleeve 102 via the bearing 103.

Reference numeral 104 denotes an adjusting screw, and the threaded portion of the adjusting screw is screwed into the shaft 101 in a direction perpendicular to the axis.
It is designed to move in b (11a). Since the structure of the belt tension adjusting mechanism 100 is well known, its detailed description will be omitted.

In the compressor (auxiliary equipment) drive device configured as described above, the tension of the refrigerator belt 9 of the drive system of the refrigerator compressor 2 or the cooler belt 10 of the cab cooler compressor 3 drive system is adjusted. To do so, open the hood of the car body and let the operator
Belt tension adjusting mechanism 10 attached to the refrigerator tension pulley 7 and the cooler tension pulley 8 from above.
0 adjusting screw 104 is rotated to adjust the adjusting shaft 101 and the tension pulley 8 (7) rotatably supported by the adjusting shaft 101 to the long hole 1
It is moved along 1b (11a) to a position where the required tension is obtained and locked there.

In this case, the tension pulleys 7 and 8 and the belt tension adjusting mechanism 100 attached to the tension pulleys 7 and 8
Is disposed in the upper portion of the engine, the belt tension adjustment work can be easily performed without interference from other members. Further, since the two tension pulleys 7 and 8 are supported at a position extremely close to the one bracket 11, the adjustment work is facilitated also from this aspect.

Further, the two tension pulleys 7,
8 is arranged on one bracket 11 and in such a manner that the horizontal component forces of the belt tension acting on the bracket 11 are opposite to each other, so that the horizontal component components due to the belt tension cancel each other out. Also, no excessive force acts on the engine body 1. Also, the tension pulleys 7 and 8
The force acting on the engine can be absorbed by one bracket 11 and prevented from being transmitted to the engine side.

[0026]

The present invention is configured as described above,
According to the present invention, since a plurality of tension pulleys are attached to one bracket and are arranged in the upper portion of the engine, the belt tension adjustment work can be performed from above the engine, and the tension adjustment can be performed as compared with the conventional one. Work is facilitated and maintainability is improved.

Further, since the tension pulleys are collectively attached to one bracket, the structure is simplified and the manufacturing cost is reduced. Furthermore, in the case of two tension pulleys, the horizontal component force exerted on their supporting portions can be offset, so that the bracket and its mounting portion to the main body in the engine do not have to be ignored and durability is improved. .

[Brief description of drawings]

FIG. 1 is a diagram showing an external structure of a compressor drive system of an engine dedicated to a refrigerating container according to an embodiment of the present invention, as viewed from the front of the engine.

FIG. 2 is an enlarged structural view showing details of a tension pulley mounting portion of FIG.

FIG. 3 is a view taken along the line III-III in FIGS. 1 and 2.

FIG. 4 is a response diagram of FIG. 1 showing a conventional example.

[Explanation of symbols]

 1 Engine Main Body 2 Refrigerator Compressor 3 Cab Cooler Compressor 4 Crank Pulley 5 Refrigerator Pulley 6 Cooler Pulley 7 Refrigerator Tension Pulley 8 Cooler Tension Pulley 9 Refrigerator Belt 10 Cooler Belt 11 Brackets 11a, 11b length Hole 100 Belt tension adjustment mechanism

Claims (1)

[Claims] 1. A crankshaft of a vehicle engine of an automobile or the like is configured to drive two or more types of accessories such as a compressor for a cab cooler and a compressor for driving a refrigerator of a refrigeration system, and the crankshaft is attached to the crankshaft. A tension pulley having a belt tension adjusting mechanism is provided for each accessory between the crank pulley and the accessory pulley attached to the rotating shaft of each accessory, and each pulley is connected by a belt. In the accessory drive device, the plurality of tension pulleys are rotatably mounted on one bracket, the bracket is attached to an upper portion of the engine body, and the belt tension of each tension pulley can be adjusted from above the engine. An accessory drive device characterized by the above.