JP2017120069A - Engine auxiliary machine driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate needs of adjustment of belt tension to enable simplification of a structure and low costs and improve maintainability.SOLUTION: An engine auxiliary machine driving device includes: a driving pulley fixed to a crank shaft of an engine disposed in a vehicle; a first bracket separately placed from the engine and installed at a frame of the vehicle; a first auxiliary machine placed on the first bracket; a second bracket separately placed from the engine and installed at a frame of the vehicle in a direction opposite to a direction, in which the first bracket is installed, across the engine; and a second auxiliary machine installed on the second bracket. A driving force of the engine is transmitted to the first auxiliary machine and the second auxiliary machine through a belt member.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an engine accessory driving apparatus that can simplify a support structure of an engine accessory.

  Engine auxiliary equipment such as an air conditioning compressor and alternator mounted on a vehicle is generally fixed directly to the engine and mounted on an engine suspension spring. However, in recent years, the engine has been reduced in size and weight, and as a result, it has become difficult to fix engine accessories to the engine block due to weight balance and space constraints. In order to cope with this problem, it has been studied to fix engine accessories to the vehicle side frame.

  Patent Document 1 discloses a support structure that fixes an engine accessory to a bracket (mounting table) supported by a vehicle-side frame that is separate from the engine. In this support structure, two auxiliary machines (air conditioning compressor and alternator) are mounted on the same bracket, and the auxiliary driven pulley is connected with a belt wound between the engine driving pulley and the auxiliary driven pulley. Driving.

JP 2004-197574 A

In the conventional engine accessory driving device, the way of swinging the engine and the way of swinging the vehicle frame are different, so that the accessory is supported by a spring force such as a coil spring in order to maintain the tension of the belt that drives the accessory. It is necessary to suppress the belt tension fluctuation by enabling the bracket to swing.
However, the support structure using a spring force such as a coil spring inevitably increases the number of parts, complicates the structure, and increases the size and cost.

  Accordingly, the present invention has been made to solve these technical problems, and an object of the present invention is to provide an engine accessory driving apparatus that supports an engine accessory on a vehicle-side frame that is separate from the engine. By eliminating the need to adjust the belt tension, maintenance work is facilitated, and the structure can be simplified and the cost can be reduced.

An engine accessory driving apparatus according to at least one embodiment of the present invention is:
A drive pulley fixed to a crankshaft of an engine disposed in the vehicle;
A first bracket separately from the engine and installed on a frame of the vehicle;
A first auxiliary machine mounted on the first bracket;
A second bracket installed on the frame of the vehicle in a direction opposite to the direction in which the engine is placed separately from the engine and the first bracket is interposed;
A second auxiliary machine installed on the second bracket,
The driving force of the engine is transmitted to the first auxiliary machine and the second auxiliary machine through a belt member.

According to the said structure, the auxiliary machine fixed to the vehicle side frame is arrange | positioned on both sides of an engine, and the tension | tensile_strength of said two belt members is added to an engine side drive pulley from the opposite direction.
In this way, by applying belt tension from the opposite direction to the engine side drive pulley, both vibrations are canceled between the engine and the vehicle side frame that are differently swayed, and the two belts The tension of the members can be balanced and fluctuations in the tension of the belt member can be suppressed.
This facilitates adjustment of the belt tension and improves maintainability.
Further, unlike the prior art, it is not necessary to enable the bracket that supports the auxiliary machine by a spring force such as a coil spring, so that the support structure of the engine auxiliary machine can be simplified and reduced in cost.

According to at least one embodiment of the present invention, belt tension can be easily adjusted, and maintainability can be improved. Further, unlike the conventional art, there is no need to provide a bracket for supporting an auxiliary machine that can be moved by a spring force such as a coil spring, so that the supporting structure of the engine auxiliary machine can be simplified and reduced in cost.
The present invention can be applied to all vehicles, and is particularly suitable for large vehicles such as buses equipped with various engine accessories.

1 is a front view of an engine accessory driving apparatus according to an embodiment of the present invention.

  Several embodiments of the present invention will be described below with reference to the accompanying drawings. However, the dimensions, materials, shapes, and relative arrangements of the components described in these embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative examples. Only.

FIG. 1 shows an engine accessory driving apparatus 10 according to an embodiment of the present invention.
In FIG. 1, a drive pulley 16 is fixed to a crankshaft 14 of the engine 12. A pair of side members 20 are provided at intervals in the vehicle front-rear direction, and a cross member 22 is installed between the pair of side members 20 in the vehicle width direction.
The engine 12 is fixed to the engine mount 18 and is separated from the vehicle-side frame including the side member 20 and the cross member 22.
The first bracket 24 is fixed to one side member 20 of the pair of side members 20, 20, and the first auxiliary machine 26 is provided to the first bracket 24. A second bracket 28 is fixed to the other side member 20, and a second auxiliary machine 30 is provided on the second bracket 28.
The first auxiliary machine 26 and the second auxiliary machine 30 sandwich the engine 12 and are arranged in opposite directions on both sides of the engine 12.

A belt is wound between the driving pulley 16 and the first auxiliary machine 26 and between the driving pulley 16 and the second auxiliary machine 30, and the driving force of the engine 12 is transmitted through the belt to the first It is transmitted to the auxiliary machine 26 and the second auxiliary machine 30.
In the figure, arrow a indicates the rear of the vehicle.

In the exemplary embodiment, as shown in FIG. 1, the first auxiliary machine 26 includes an air conditioning compressor 32 and an alternator 34. The first bracket 24 is provided with a driven pulley 36.
A belt 38 is wound between the drive pulley 16 and the driven pulley 36, and a belt 42 is wound between the driven pulley 36 and the driven pulley 40 attached to the rotation shaft (not shown) of the air conditioning compressor 32. Turned. A belt 46 is wound between the driven pulley 36 and a driven pulley 44 attached to a rotating shaft (not shown) of the alternator 34.
The rotational force of the driving pulley 16 is transmitted to the driven pulleys 40 and 44 via the driven pulley 36 to drive the air conditioning compressor 32 and the alternator 34.

In the exemplary embodiment, as shown in FIG. 1, the second accessory 30 is a cooling fan,
A belt 50 is wound between the drive pulley 16 and a driven pulley 48 attached to the rotating shaft 30a of the cooling fan.
The belts 38, 42, 46 and 50 are provided with tension rollers 52, 54, 56 and 58, respectively.
The tension rollers 52, 54 and 56 are attached to the first bracket 24 so as to be movable in the direction intersecting the belt traveling direction, and are moved in the direction intersecting the belt traveling direction to thereby adjust the tension of each belt. It can be adjusted.
The tension roller 58 is attached to the second bracket 28 so as to be movable in a direction intersecting the moving direction of the belt 50, and the tension of the belt 50 can be adjusted by moving in the direction intersecting the traveling direction of the belt 50. .
A radiator 60 is provided behind the second auxiliary machine (cooling fan) 30.

In such a configuration, the drive pulley 16 rotates in the direction of arrow b in FIG. The driving force of the driving pulley 16 is transmitted to the driven pulleys 40 and 44 via the driven pulley 36 to operate the air conditioning compressor 32 and the alternator 34.
Further, the driving force of the driving pulley 16 is transmitted to the driven pulley 48 to operate the cooling fan 30. As a result, wind is drawn from the radiator 60 and the cooling water flowing through the radiator 60 is cooled.
At this time, the first auxiliary machine 26 and the second auxiliary machine 30 sandwich the engine 12 and are provided on the vehicle side frames on both sides of the engine 12, and the two belts 38 from the opposite direction with respect to the drive pulley 16. Apply 50 tension.

According to some embodiments, as described above, the tension of the two belts 38 and 50 is applied to the drive pulley 16 from opposite directions, so that the engine 12 and the vehicle-side frame that are differently swayed are applied. In the meantime, both vibrations are canceled out, and the tensions of the two belts 38 and 50 are balanced, so that fluctuations in tension of these belts can be suppressed.
As a result, the belt tension can be adjusted naturally, so that the belt tension can be easily adjusted and the maintainability can be improved.
Further, unlike the prior art, an auxiliary machine support bracket that can be oscillated by a spring force such as a coil spring is not required, so that the support structure of the engine auxiliary machine can be simplified and reduced in cost. Furthermore, it becomes unnecessary to replace coil springs, brackets, etc., and maintenance becomes easy.

Further, since the driven pulleys 36, 40, 44 and 48 provided on the vehicle side frame (the side member 20, the cross member 22, etc.) are fixed, it is not necessary to adjust the position of these driven pulleys when adjusting the belt tension. Therefore, maintainability can be improved.
Further, by using sealed ball bearings containing grease in the bearings of the drive pulley 16 and the driven pulleys 36, 40, 44, and 48, the maintenance of the bearings becomes unnecessary, and the weight and the space can be saved. .

  According to at least one embodiment of the present invention, the engine accessory is supported on a vehicle-side frame separately from the engine, adjustment of the belt tension becomes unnecessary, maintenance work is facilitated, and the structure is simplified and It is possible to reduce costs and improve maintainability.

DESCRIPTION OF SYMBOLS 10 Engine accessory drive device 12 Engine 14 Crankshaft 16 Drive pulley 18 Engine mount 20 Side member 22 Cross member 24 First bracket 26 First accessory 28 Second bracket 30 Second accessory (cooling fan)
30a Rotating shaft 32 Air conditioning compressor 34 Alternator 36, 40, 44, 48 Driven pulley 38, 42, 46, 50 Belt 52, 54, 56, 58 Tension roller 60 Radiator

Claims (1)

A drive pulley fixed to a crankshaft of an engine disposed in the vehicle;
A first bracket separately from the engine and installed on a frame of the vehicle;
A first auxiliary machine mounted on the first bracket;
A second bracket installed on the frame of the vehicle in a direction opposite to the direction in which the engine is placed separately from the engine and the first bracket is interposed;
A second auxiliary machine installed on the second bracket,
An engine accessory driving apparatus that transmits a driving force of the engine to the first accessory and the second accessory via a belt member.

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