JPH068744A - Mounting structure for automobile accessories - Google Patents

Abstract

PURPOSE:To prevent worsening of vibration and noise of a vehicle owing to an exciting force occasioned by vibration of an auxiliary machine. CONSTITUTION:An internal combustion engine 1 drives a hydraulic pump 9 and hydraulic motors 22 and 23 being an auxiliary machine are rub by means of a delivery oil pressure therefrom. A center member 6 being a part of a car body frame is located between a cross member 4 and a radiator core support 5 and an auxiliary machine mounting plate 16 is resiliently supported on the upper surface of the center member. An alternator 18 and a compressor 19 being an auxiliary machine are fixed on an auxiliary machine mounting plate 16 in a posture where a rotary shaft is extended along a vertical direction the hydraulic motors 22 and 23 are integrally formed in series therewith.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for an automobile auxiliary machine, particularly an external auxiliary machine such as an alternator or a compressor for an air conditioner.

[0002]

2. Description of the Related Art In an automobile driven by an internal combustion engine, external auxiliary equipment such as an alternator and a compressor are generally mechanically driven by an engine output via a V-belt. Therefore, the alternator and the compressor are supported by the engine through the bracket at the front end of the internal combustion engine. Also, because of the belt drive, the rotating shafts of the auxiliary machinery are always parallel to the engine crankshaft, and are substantially horizontal when mounted on the vehicle.

Further, Japanese Patent Laid-Open No. 2-175336 discloses a configuration in which auxiliary machines such as an alternator and a compressor are driven by a hydraulic motor. It is arranged in a posture parallel to the axis.

[0004]

A relatively large external accessory such as an alternator or a compressor generates a considerably large vibration force in the direction perpendicular to the axis as it is driven. Therefore,
If the vehicle is mounted on the vehicle with the rotary shaft extending substantially horizontally as in the conventional case, the vehicle body vibrates up and down due to the exciting force generated by the auxiliary machine, and the noise and vibration characteristics of the vehicle deteriorate.

Particularly, in the case of driving auxiliary equipment by a hydraulic motor or the like, if the auxiliary equipment is supported independently of the engine and mounted on the vehicle body frame, a sufficient anti-vibration mechanism such as an engine mount intervenes. Therefore, the excitation force from the auxiliary machine is directly input to the vehicle body, and the noise and vibration are further deteriorated.

[0006]

SUMMARY OF THE INVENTION Therefore, according to the present invention, an exterior auxiliary machine attached to an automobile motor is configured to be driven by an auxiliary machine drive motor, and the exterior auxiliary machine and the auxiliary machine drive motor are also provided. Is supported by the vehicle body frame independently of the prime mover in a posture in which its rotation axis extends in the vertical direction of the vehicle body.

According to the second aspect of the present invention, the exterior auxiliary machine and the auxiliary machine drive motor coaxially have a rotary shaft, and the both are vertically integrated.

Further, in the invention of claim 3, the auxiliary machine drive motor is composed of a hydraulic motor, and is operated by the discharge hydraulic pressure of a hydraulic pump driven by the prime mover.

[0009]

The exterior accessory is driven separately from the prime mover by an accessory drive motor such as a hydraulic motor. Since the rotation axis of this exterior accessory is along the vertical direction of the vehicle body, the exciting force generated in the axis-perpendicular direction due to the drive of the accessory is input horizontally to the vehicle body. Since the sensitivity of the vehicle body to vibrations is much lower in the lateral input than in the vertical input, vibration and noise are reduced.

Further, if the exterior accessory and the accessory drive motor are integrated vertically, the mounting space on the vehicle body frame is reduced accordingly.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

1 and 2 show the structure of the front portion of a vehicle according to the first embodiment of the present invention. This embodiment is an example in which an internal combustion engine 1 is mounted as a prime mover in a so-called horizontal type, and as a vehicle body frame, rear members of left and right front side members 2 and 3 are connected to each other by cross members 4 and The radiator core supports 5 are connected to each other at their front ends, and the center member 6 parallel to the front side members 2 and 3 is connected to the center part of the cross member 4 and the center part of the radiator core support 5. The front end of the center member 6 and the radiator core support 5 are
As shown in detail in FIG. 3, the center member 6 is in a floating state by being elastically bolted through an insulator rubber 7. The internal combustion engine 1 is supported by the vehicle body frame via an engine mount (not shown) with the transmission 8 provided at the end thereof.

Further, the internal combustion engine 1 has a hydraulic pump 9 mounted on the side surface in front of the vehicle. This hydraulic pump 9
Is mechanically driven by an engine crankshaft 13 via a V-belt 12 wound around a pulley 10 and a crank pulley 11 at the end of the drive shaft. Reference numeral 14 is an oil tank connected to the suction side of the hydraulic pump 9, and the oil tank 14 is attached at an appropriate position on the front part of the vehicle. Reference numeral 15 indicates the left and right front wheels.

On the upper surface of the front portion of the center member 6, an accessory mounting plate 16 having a rectangular shape elongated in the vehicle width direction is mounted. The accessory mounting plate 16 is located between the internal combustion engine 1 and the radiator core support 5, and is elastically bolted to the center member 6 via an insulator rubber 17, as shown in detail in FIG. ing. That is, the accessory mounting plate 16 is in a floating state with respect to the center member 6. An alternator 18 and a compressor 19 for an air conditioner, which are arranged around the internal combustion engine 1 and are relatively heavy, are attached to the upper surface of the accessory mounting plate 16 side by side. There is.

Each of the alternator 18 and the compressor 19 has a mounting flange 20 (see FIGS. 3 and 4) at one end thereof along a plane orthogonal to the rotation axis. It is firmly connected to the machine mounting plate 16 by bolts 21. That is, the alternator 18 and the compressor 19 are attached such that their rotation axes are along the vertical direction of the vehicle body. Then, the alternator 18 and the compressor 19
Respectively include hydraulic motors 22 and 23 as auxiliary machine drive motors. The hydraulic motors 22 and 23 have rotating shafts coaxially with the alternator 18 and the compressor 19, and as shown in FIG. 4, are connected in series to the upper ends of the alternator 18 and the compressor 19, respectively, and are substantially It has a structure that is integrated vertically. Each of the hydraulic motors 22 and 23 is driven by the discharge hydraulic pressure of the hydraulic pump 9, the oil inlets are connected in parallel to each other on the discharge side of the hydraulic pump 9 via the hydraulic pressure supply passage 24, and the oil outlets return. It is connected to the oil tank 14 via a passage 25.

According to this embodiment, the hydraulic motors 22, 2
3 and the alternator 18 and the compressor 19 are relatively heavy objects, the vibrations associated with their driving tend to be large, but the alternator 18 and the compressor 19
Since the vibration force generated by the driving of the vehicle is generated along the horizontal direction of the vehicle body, the vibration and noise of the vehicle are reduced as compared with the conventional case of inputting along the vertical direction of the vehicle body.
Moreover, the accessory mounting plate 16 that supports the alternator 18 and the like is supported by the center member 6 via the insulator rubber 17, and the insulator rubber 7 is also interposed between the center member 6 and the radiator core support 5. Therefore, the vibration of the auxiliary machine is double-vibrated, and the vibration transmitted to the front side members 2 and 3 is further reduced. The hydraulic pump 9 is the internal combustion engine 1
It is attached to the side, but this is the alternator 18
It is smaller than the compressor 19 and the compressor 19, and the vertical vibration generated here is not a problem.

Further, in the above structure, since the entire end surface of the auxiliary machine is connected to the auxiliary machine mounting plate 16, the connecting rigidity can be ensured to be large as compared with the case where the side surface of the internal combustion engine 1 is supported in a cantilever manner. From this point as well, the vibration of the alternator 18 and the like is suppressed. Further, since the hydraulic motors 22 and 23 for driving the auxiliary machines are stacked above, the size can be reduced as a whole and the mounting space does not occupy a large amount.

In general, the alternator 18 and the compressor 19 are heavier than the hydraulic motors 22 and 23. Therefore, in the above-described embodiment, the alternator 18 and the compressor 19 are disposed at the bottom to reduce the vibration.
Although 2 and 23 are stacked on the upper part, conversely, the hydraulic motors 22 and 23 may be arranged on the lower part and the alternator 18 and the like may be arranged on the upper part. With such an arrangement, even if the hydraulic oil leaks from the hydraulic motors 22 and 23, the alternator 18 and the like will not be contaminated.

If, for example, a radial pump is used as the hydraulic pump P, the discharge flow rate becomes constant at a certain rotational speed or higher. Therefore, it becomes possible to always drive the auxiliary machine at a constant rotation even when the engine is idle.

Next, FIG. 5 shows a second embodiment of the present invention. In this embodiment, a relatively small accessory mounting plate 16 is provided on the front upper surfaces of the left and right front side members 2 and 3.
A and 16B are attached. Although illustration is omitted, it is desirable to arrange an insulator rubber between the accessory mounting plates 16A and 16B and the front side members 2 and 3 to elastically support them, as in the first embodiment described above. An alternator 18 is fixed to the upper surface of one accessory mounting plate 16A, and a compressor 19 is fixed to the upper surface of the other accessory mounting plate 16B. These alternator 18 and compressor 19 are integrated with the hydraulic motors 22 and 23 as in the first embodiment described above.

According to this embodiment, the space at the front corner of the engine room can be effectively used as an auxiliary equipment accommodation space. In other words, by arranging the alternator 18 and the compressor 19 independently, the degree of freedom in layout is increased, and the space can be used more effectively.

In each of the above embodiments, the hydraulic motor is used as the auxiliary machine drive motor, but an electric motor may be used instead of the hydraulic motor to have the same configuration. Further, it can be applied to a so-called electric vehicle using an electric motor as a prime mover.

[0023]

As is clear from the above description, according to the mounting structure for an automobile accessory according to the present invention, the vibration force associated with the driving of the accessory is input horizontally to the vehicle body. Vibration and noise generated in the vehicle body can be suppressed compared to the conventional configuration in which the rotation axis of the auxiliary machine is oriented horizontally. Therefore, it becomes possible to support the auxiliary machinery on the vehicle body frame apart from the prime mover, and the space in the engine room can be effectively used.

Further, if the accessory and the accessory drive motor are integrated vertically, the overall size can be reduced and the mounting space on the vehicle body frame can be reduced.

[Brief description of drawings]

FIG. 1 is a plan view of a front portion of an automobile showing a first embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a sectional view taken along the line AA of FIG. 2 showing a main part of this embodiment.

FIG. 4 is a perspective view of an auxiliary machine and a hydraulic motor.

FIG. 5 is a plan view of the front portion of the automobile showing the second embodiment of the present invention.

[Explanation of Codes] 1 ... Internal Combustion Engine (Motor Engine) 2, 3 ... Front Side Member (Vehicle Frame) 4 ... Cross Member 5 ... Radiator Core Support 6 ... Center Member (Vehicle Frame) 9 ... Hydraulic Pump 18 ... Alternator ( Exterior accessories 19 ... Compressor (exterior accessories) 22, 23 ... Hydraulic motor (auxiliary drive motor)

Claims (3)

[Claims] 1. An exterior auxiliary machine attached to an automobile prime mover is configured to be driven by an auxiliary machine drive motor, and the exterior auxiliary machine and the auxiliary machine drive motor have rotation axes in the vertical direction of the vehicle body. A mounting structure for an auxiliary machine for an automobile, which is supported by a body frame independently of a prime mover in a conforming posture. 2. The mounting of an automobile accessory according to claim 1, wherein the exterior accessory and the accessory drive motor have a rotary shaft coaxially with each other and are vertically integrated with each other. Construction. 3. The mounting structure for an automobile accessory according to claim 1, wherein the accessory drive motor is a hydraulic motor, and is operated by a discharge hydraulic pressure of a hydraulic pump driven by the prime mover.