JP2929914B2 - Vehicle accessory drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art In a refrigeration container vehicle, a compressor for a refrigerator and a compressor for a cab cooler of a refrigeration 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 the accessory drive system of this type of refrigerated container vehicle viewed from the front side of the engine.

In FIG. 1, reference numeral 1 denotes an engine body, 2 denotes a compressor for a refrigerator of a refrigeration system, 3 denotes a compressor for a cab cooler, and 4 denotes a crank pulley fixed to a crankshaft of the engine and driven to rotate by the crankshaft.
Reference numeral 5 denotes a pulley for a refrigerator fixed to a rotating shaft of a compressor for a refrigerator, 6 denotes a pulley for a cooler fixed to a rotating shaft of a cab cooler, 7 denotes a tension pulley for a refrigerator, and 8 denotes a tension pulley for a cab cooler. .

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

[0005] The tension pulley 7 for the refrigerator is shown in FIG.
As shown in FIG. 1, the bracket is supported by a dedicated bracket (not shown) fixed to the engine body 1 at the upper left side when viewed from the front of the engine, that is, at the lower right side of the cooler pulley 6. Further, the cooler tension pulley 8 is supported by a dedicated bracket (not shown) at a lower right position on the opposite side of the engine pulley from the refrigerator pulley.

[0006]

In the above-described compressor (auxiliary machine) driving device, the tension pulley 7,
The belts 9, 10 are operated by operating the adjustment mechanism attached to the belt 8.
It is necessary to 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 driving apparatus 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 narrow and adjustment work is difficult, and the adjustment work is difficult because the two tension pulleys 7 and 8 are arranged at separate positions. It was troublesome.

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.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an auxiliary device driving device which is easy to adjust the belt tension of a tension pulley, has high maintainability, and has a reduced product cost.

[0010]

According to the present invention, in order to solve the above-mentioned problems, a tension pulley provided for each accessory is rotatably mounted on one bracket, and the plurality of tension pulleys provided on the bracket are provided. A bracket in which the positions of the plurality of tension pulleys are set is installed above the engine body so that the horizontal component of the force applied to the bracket is canceled by the belt tension applied to each of the tension pulleys. Te, is characterized in that the adjustment of the belt tension of the tension pulley and enforceable constructed from above the engine.

[0011]

As described above, in the case of an automobile engine, in order to operate the belt tension adjusting device provided with a tension pulley of an auxiliary device driving device such as a refrigerator or a cooler compressor, the hood of the vehicle is opened and the upper portion of the engine is opened. However, the efficiency around the engine is generally low due to the narrow space around the engine.

In the present invention, since a plurality of tension pulleys are provided above the engine and provided on one bracket, and a plurality of tension pulleys are provided at the closest positions, the belt tension adjusting operation is performed. And maintenance is improved.

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

Further, the two tension pulleys can be mounted almost symmetrically on a vertical line including the crankshaft center, and the horizontal component of the belt tension applied to the tension pulleys is offset. No excessive force is applied.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; 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 but to merely illustrative examples. It's just

FIG. 1 is a front front view of an engine for an automobile, ie, a refrigerated container car, on which the refrigeration equipment according to the present invention is mounted. In the figure, 1 is an engine body, 2 is a refrigerator compressor for 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 driven to rotate by the crankshaft.

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

The refrigerator pulley 5 is driven to rotate by the crank pulley 4 via a refrigerator belt 9 provided between the refrigerator pulley 5, the refrigerator tension pulley 7 and the clamp pulley 4. The cooler pulley 6 is driven to rotate by the crank pulley 4 via a cooler belt 10 provided between the cooler pulley 6, the cooler tension pulley 8, and the crank pulley 4.

As shown in FIG. 2, the tension pulley 7 for the refrigerator and the tension pulley 8 for the cooler are rotatably supported close to each other on a single bracket 11 fixed to an upper portion of the engine body.

FIG. 2 shows the details of the mechanism for attaching the two tension pulleys 7 and 8 to the bracket 11. The plate-like bracket 11 has two long holes 11a,
11b, a tension pulley 7 for a refrigerator is mounted in the elongated hole 11a, and a tension pulley 8 for a cooler is mounted in the elongated hole 11b so as to be movable in the elongated holes 11a and 11b. The bracket 11 has a bolt hole 11c.
It is fixed to the engine main body 1 by a mounting bolt inserted therein.

FIG. 3 shows the mounting of the tension pulleys 7 and 8 on the bracket 11 and the belt tension adjusting mechanism 100.
The details are shown below. In the drawing, 100 is a belt tension adjusting mechanism, 101 is an adjusting shaft of the adjusting mechanism 100 slidably fitted in the elongated hole 11b (11a), 102 is a sleeve fitted on the outer periphery of the shaft, 103 is A tension pulley 8 (7) is rotatably supported on the adjustment shaft 101 and the sleeve 102 via the bearing 103.

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

In the compressor (auxiliary machine) driving device configured as described above, the tension of the refrigerator belt 9 of the driving system of the refrigerator compressor 2 or the cooler belt 10 of the driving system of the cab cooler compressor 3 is adjusted. To do this, open the hood of the car body and
Tension adjusting mechanism 10 attached to the tension pulley 7 for the refrigerator and the tension pulley 8 for the cooler from above.
Rotating the adjusting screw 104, the adjustment shaft 101 and the tension pulley 8 (7) supported by the
It is moved along the position 1b (11a) to a position where the required tension is obtained, and locked here.

In this case, the tension pulleys 7 and 8 and the belt tension adjusting mechanism 100 attached thereto
Is arranged above the engine, the operation of adjusting the belt tension can be easily performed without interference from other members. In addition, since the two tension pulleys 7 and 8 are supported at a position very close to one bracket 11, the adjustment work is facilitated from this aspect.

Further, the two tension pulleys 7,
8 is disposed on one bracket 11 so that the horizontal component of the belt tension acting on the bracket 11 is in the opposite direction, so that the horizontal component of the belt tension is canceled out with each other, and Also, no excessive force acts on the engine body 1. Also, the tension pulleys 7, 8
Can be absorbed by one bracket 11 to prevent transmission 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 mounted on one bracket and arranged above the engine, the belt tension can be adjusted from above the engine. Work is facilitated, and maintainability is improved.

Further, since the tension pulleys are collectively mounted on one bracket, the structure is simplified and the manufacturing cost is reduced. Further, in the case of two tension pulleys, the horizontal component force applied to the support portions can be offset, so that an excessive force is not applied to the bracket and its mounting portion to the main body by the engine, and the durability is improved. .

[Brief description of the drawings]

FIG. 1 is a view showing the external structure of a compressor drive system for a refrigeration container dedicated engine 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 in FIG. 1;

FIG. 3 is a view taken in the direction of arrows III-III in FIGS. 1 and 2;

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

[Explanation of symbols]

 DESCRIPTION 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 Bracket 11a, 11b Length Hole 100 Belt tension adjustment mechanism

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F02B 67/06

Claims (1)

(57) [Claims] 1. A compressor for driving a cab cooler and a compressor for driving a refrigerator in a refrigerating system, which are driven by a crankshaft of a vehicle engine such as an automobile. A tension pulley having a belt tension adjusting mechanism is interposed between a crank pulley and an auxiliary pulley attached to a rotating shaft of each auxiliary for each auxiliary, and the pulleys are connected by a belt. In the accessory driving device, the plurality of tension pulleys are rotatably mounted on a single bracket, and the belt tension applied to each of the plurality of tension pulleys provided on the bracket reduces the force applied to the bracket. as the horizontal component force is canceled, the engine brackets setting the arrangement position of the plurality of tension pulley Attached to upper part of the body, the accessory drive system, characterized in that the belt tension of the tension pulley adjustably constructed from above the engine.