JPH0688535A - Accessories driving device of automobile - Google Patents

Abstract

PURPOSE:To improve sound vibration performance of a vehicle in an accessories driving device of an automobile provided with accessories driven by a hydraulic motor. CONSTITUTION:An engine mount elastic member 6 which supports an engine 1 on the member 10 of a vehicle body is provided, and an accessories mounting member 5 connected to an alternator 4 is arranged between the engine mount elastic member 6 and the engine 1, in an accessories driving device of an automobile provided with an oil pressure pump 2 driven by the engine 1, a hydraulic motor 3 rotated by working oil supplied from the oil pressure pump 2, and an alternator 4 driven by the hydraulic motor 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an accessory drive system for a vehicle.

[0002]

2. Description of the Related Art As an engine accessory drive device for driving an accessory by a hydraulic motor, belts and pulleys for transmitting the engine rotation to the accessory are eliminated, and the rotation speed of the accessory is independent of the engine rotation. It is possible to increase the degree of freedom in arranging the auxiliary machinery as well as controlling them.

As an accessory drive device of this type, as shown in FIG. 5, for example, a hydraulic pump 42 to which a rotational force is transmitted from an engine 41, and a hydraulic circuit 46 from the hydraulic pump 42 are conventionally used.
Hydraulic motor 43 that is rotated by hydraulic fluid guided via
And a cooling fan 49 rotated by the hydraulic motor 43 (Japanese Patent Laid-Open No. 63-79432).
Gazette, reference).

The hydraulic motor 43 and the cooling fan 49 are fixedly connected to the frame of the vehicle body through bolts or the like.

[0005]

However, vibrations are generated in the hydraulic motor and the auxiliary machine under the influence of the pulsation of the hydraulic pressure supplied to the hydraulic motor discharged from the hydraulic pump, the influence of the load change of the auxiliary machine, and the like. , The vibration of auxiliary machinery is transmitted to the vehicle body,
There was a possibility that it might cause deterioration of vehicle vibration performance.

It is an object of the present invention to improve the sound and vibration performance of a vehicle in an accessory drive device for an automobile having an accessory driven by a hydraulic motor, focusing on the above problems.

[0007]

DISCLOSURE OF THE INVENTION The present invention is an automobile provided with a hydraulic pump driven by an engine, a hydraulic motor rotated by hydraulic oil sent from the hydraulic pump, and an auxiliary machine driven by the hydraulic motor. In the accessory drive device, an engine mount elastic member that supports the engine with respect to the vehicle body is provided, and an accessory mount member to which the accessory is connected is disposed between the engine mount elastic member and the engine.

[0008]

Operation: An auxiliary machine that is driven to rotate by a hydraulic motor generates vibration due to the influence of hydraulic pulsation sent from the hydraulic pump to the hydraulic motor or the load change of the auxiliary machine. The engine mount elastic member connected to the elastic member is elastically deformed and absorbed, and a sufficient vibration damping effect is obtained.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 and 2, 1 is an engine mounted on an automobile, 2 is a hydraulic pump, and 3 is this hydraulic pump 2.
It is a hydraulic motor that rotates with hydraulic oil sent from
An alternator (generator) that generates electric power for various electric devices is provided as an auxiliary machine that is rotationally driven by the hydraulic motor 3. An air conditioner compressor that compresses the refrigerant for air conditioning in the vehicle may be provided as an auxiliary machine that is rotationally driven by the hydraulic motor 3.

A pulley 21 is connected to the crankshaft of the engine 1, and a pulley 22 is attached to the rotary shaft of the hydraulic pump 2.
Is connected and a belt is wound around each pulley 21 and 22. Engine 1 via this belt 28
Is transmitted to the hydraulic pump 2.

The hydraulic oil stored in the tank 30 is supplied to the pipe 27.
The hydraulic oil that is sucked up by the hydraulic pump 2 through the hydraulic pump 2 and discharged from the hydraulic pump 2 is guided to the hydraulic motor 3 through the pipe 26, and the hydraulic oil that is discharged after the hydraulic motor 3 is rotated is returned to the tank 30 through the pipe 29. . The discharge flow rate of the hydraulic pump 2 is set to be substantially constant regardless of the rotation speed of the engine 1, and the rotation speeds of the hydraulic motor 3 and the alternator 4 are kept substantially constant.

In the figure, 10 is a member of the vehicle body, 33 is an engine mount elastic member for elastically supporting the engine 1 with respect to the vehicle body, and this engine mount elastic member 6
The vibration transmitted from the engine 1 to the vehicle body is attenuated by the.

The engine mount elastic member 6 is formed of rubber or the like in a block shape having a fan-shaped cross section, and metal flanges 38, 38 are formed on both ends of the engine mount elastic member 6.
39 are combined.

A mounting bracket 34 is connected to the member 10 via a plurality of bolts 36, and the engine mount elastic member 6 is attached to the mounting bracket 34.
One of the flanges 38 that is connected to the.

Reference numeral 5 in the drawing denotes an accessory mounting member, and this accessory mounting member 5 has two flange portions 11, 1 for connecting in an L shape.
2, the alternator 4 is connected to the one flange portion 11 via a plurality of bolts 41.

The accessory mounting member 5 is arranged between the engine mount elastic member 6 and the engine 1. The flange portion 12 of the accessory mounting member 5 is joined to the flange 39 that is joined to the engine mount elastic member 6 and is joined to the mounting seat 37 formed in the engine 1, and the flange 39, the accessory mounting member 5, and the mounting seat 37 are fastened to each other via a bolt (not shown).

Next, the operation will be described.

The hydraulic oil discharged from the hydraulic pump 2 is supplied to each hydraulic motor 3, and the hydraulic motor 3 is rotated by this hydraulic oil to rotationally drive the alternator 4. Hydraulic pump 2
The flow rate characteristic of the hydraulic oil discharged from the engine is set so as to have a constant flow rate above a certain engine speed, and the rotation speed of the alternator 4 is controlled so as not to exceed a constant value. As a result, the alternator 4 can be downsized.

The alternator 4 or the hydraulic motor 3 vibrates due to the influence of the pulsation of the hydraulic pressure supplied from the hydraulic pump 2 to the hydraulic motors 31 and 32 and the load fluctuation of the alternator 4.

Since the accessory mounting member 5 is joined to the engine mount elastic member 6 through the flange 39, the vibration transmitted from the alternator 4 to the accessory mounting member 5 is the flange 3.
It is absorbed by elastically deforming the engine mount elastic member 6 via 9, and the member 1 is passed from the alternator 4 or the hydraulic motor 3 via the engine mount elastic member 6.
The excitation force transmitted to 0 can be suppressed to a small level. As a result, the vibration transmitted from the alternator 4 to the vehicle body can be sufficiently suppressed to improve the sound vibration performance of the vehicle, and the vibration of the alternator 4 can be suppressed to enhance its durability.

In this manner, the engine mount elastic member 6 elastically supports the alternator 4 together with the engine 1 with respect to the member 10, so that a member for elastically supporting the alternator 4 is provided separately from the engine mount portion. Compared to the structure, the number of parts and mounting space can be reduced.

Next, in another embodiment shown in FIG. 3, the accessory mounting member 5 to which the alternator 4 is connected is directly joined to the engine mount elastic member 6 to be joined thereto. The accessory mounting member 5 is fastened to the mounting seat 37 of the engine 1 via a bolt (not shown).

In this case, by reducing the number of parts and directly joining the accessory mounting member 5 to the engine mount elastic member 6, the alternator 4 and the hydraulic motor 3 are connected.
The vibration absorption of can be further improved.

Next, in another embodiment shown in FIG. 4, the accessory mounting member 5 is sandwiched between two engine mount elastic members 6 and 7.

In this case, the vibration of the accessory mounting member 5 is absorbed by the elastic deformation of the two engine mount elastic members 6 and 7, respectively, and the vibration absorbability of the alternator 4 and the hydraulic motor 3 is further enhanced.

In the structure in which the auxiliary machine is driven via the belt, the auxiliary machine must be fixedly attached to the engine, but in the structure in which the auxiliary machine is driven by each hydraulic motor, these auxiliary machines are driven by the engine. No need to be fixedly attached to 1.

[0028]

As described above, the present invention is an automobile equipped with a hydraulic pump driven by an engine, a hydraulic motor rotated by operating oil sent from the hydraulic pump, and an auxiliary machine driven by the hydraulic motor. In the accessory drive device described above, an engine mount elastic member that supports the engine with respect to the vehicle body is provided, and the accessory mount member to which the accessory is connected is disposed between the engine mount elastic member and the engine. Alternatively, the vibration generated in the hydraulic motor can be damped by the engine mount elastic member, and the vibration transmitted to the vehicle body can be sufficiently suppressed, thereby preventing unpleasant vibration noise from being generated in the vehicle interior. Further, by elastically supporting the auxiliary machine by the engine mount elastic member, it is possible to suppress an increase in the number of parts and mounting space.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a front view showing another embodiment.

FIG. 4 is a front view showing still another embodiment.

FIG. 5 is a hydraulic circuit diagram showing a conventional example.

[Explanation of symbols]

 1 engine 2 hydraulic pump 3 hydraulic motor 4 alternator 5 accessory mounting member 6 engine mount elastic member

Claims (1)

[Claims] 1. An accessory drive device for an automobile, comprising: a hydraulic pump driven by an engine; a hydraulic motor rotated by hydraulic oil sent from the hydraulic pump; and an accessory driven by the hydraulic motor. An accessory drive device for an automobile, comprising: an engine mount elastic member for supporting the engine with respect to a vehicle body; and an accessory mounting member to which the accessory is connected is arranged between the engine mount elastic member and the engine. .