JP2004293374A - Gas compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas compressor having a simple structure and easily mounted. <P>SOLUTION: This gas compressor is composed of a cylinder (6) freely swingably attached on the spring of a body, a piston (7) which is mounted to be freely reciprocated in the cylinder (6) and whose outer end (7a) is freely swingably attached under the spring, a pressure accumulating member (5) comprising an intake valve (4f) arranged in the cylinder (6) and a delivery valve (4r) energized by a valve spring (4k), and a pressure accumulating tank (30) for storing compressed gas generated by the pressure accumulating member (5). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a gas compression device provided as a subsidiary to a vehicle.
[0002]
[Prior art]
FIG. 5 shows a method of supplying air to a brake or other air load 40 used in the vehicle. The air reservoir tank 30 is communicated via a tube 2L attached to the compressor 2 driven by the engine. ing.
[0003]
The compressor 2 is set to operate and fill when the air in the air reservoir tank 30 runs short. However, when the start and stop are performed frequently due to traffic congestion and the amount of air consumption is large, the operation rate is reduced. As a result, the life of the compressor 2 is shortened and the fuel consumption by driving the compressor is increased.
[0004]
There is an example of a conventionally proposed technique in which a road surface impact during traveling of a vehicle is changed to air pressure and sent to a turbine to rotate a moving blade to obtain auxiliary power (for example, see Patent Document 1).
However, the above is not limited to vehicles that use rotor blade rotation as a driving force and is not common.
Further, there is an example in which the road surface shock absorption energy is changed to power generation or compressed air to operate the engine auxiliary motive power machine (for example, see Patent Document 2).
However, this technique is also uncommon in that it requires an auxiliary power machine.
[0005]
[Patent Document 1]
JP-A-6-135257 (see FIG. 1 and its description)
[Patent Document 2]
JP-A-6-22012 (see FIG. 1 and its description)
[0006]
[Problems to be solved by the invention]
The present invention has been proposed in view of the above-described problems of the related art, and has as its object to provide a gas compression device having a simple structure and easy installation.
[0007]
[Means for Solving the Problems]
As a result of various studies, the inventor has developed a gas compression device having a simple structure and easy installation.
[0008]
The gas compression device of the present invention comprises a cylinder (6) swingably mounted on a sprung body (17) of a vehicle body, and an outer end (7a) reciprocally mounted in the cylinder (6). A piston (7) swingably attached to an unsprung (20), an intake valve (4f) provided in the cylinder (6), and a discharge valve (4r) urged by a valve spring (4k). And a pressure accumulating tank (30) for storing the compressed gas generated by the pressure accumulating member (5).
[0009]
With the above configuration, unsprung vibration of the vehicle body causes the pressure accumulating member to expand and contract to generate high-pressure air, which is stored in the pressure accumulating tank to absorb energy.
[0010]
A pressure regulating valve that opens at a first predetermined pressure to a pressure tube (L5) communicating the pressure accumulating member (5) and the pressure accumulating tank (30) and closes at a second predetermined pressure higher than the first predetermined pressure. It is preferable that (10) is interposed (claim 2).
[0011]
In a pressure accumulating tank used as a normal air reservoir, for example, the maximum pressure is set to “10 kg / cm ² ”, and the supply pressure of the pressure accumulating member at that time is set to a first predetermined pressure, for example, “7.8 kg / cm ² ”. Then, the valve is closed at a high second predetermined pressure, for example, “9.2 kg / cm ² ” to maintain the accumulator tank at an appropriate pressure without excessive pressure.
[0012]
The sprung mass of the pressure accumulating member (5) to which the cylinder (6) is attached is preferably an outer surface (12a) of the frame (12).
[0013]
In practice, the upper part of the cylinder is swingably attached to a bracket attached to the outer surface of the frame via an elastic material, and has a flexible structure that withstands the stroke of the suspension spring and windup during sudden braking.
[0014]
The unsprung portion of the pressure accumulating member (5) to which the outer end (7a) of the piston (7) is attached is preferably a front spring (26) (claim 4).
[0015]
In practice, the outer end of the piston is swingably mounted via an elastic material with a pin supported by a front spring, and has a flexible structure that can withstand the stroke of the suspension spring and windup during sudden braking.
[0016]
The unsprung portion of the pressure accumulating member (5) to which the outer end (7a) of the piston (7) is attached is preferably a front axle (24).
[0017]
In implementation, the outer end of the piston is swingably attached to an attachment member fixed to the front axle via an elastic material, and has a flexible structure that can withstand the stroke of the suspension spring and windup during sudden braking.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The reference numerals and names used in the description of the related art are used repeatedly if the configurations and functions are the same.
[0019]
In FIG. 1, the arrangement of the gas compression device of the present invention will be described.
In FIG. 1, a sprung portion 17 of the vehicle is a side frame 12, and an unsprung portion 20 is constituted by a front wheel 22, a front axle 24, and a front spring 26. And approximately unsprungly between the unsprung 20.
[0020]
The pressure accumulating member 5 is composed of a cylinder 6 and a piston 7 as will be described in detail later with reference to FIG. 4, and the cylinder 6 is mounted on the frame 12 so as to be swingable. It is swingably attached to a front spring 7 in the vicinity.
[0021]
In the drawing, reference numeral 27 denotes a front support member of a front spring 26 constituted by a leaf spring, reference numeral 28 denotes a rear support member of the front spring 26, reference numeral 8 denotes a shock absorber, and reference numeral G. L is a road surface.
[0022]
FIG. 2 is a block diagram showing an arrangement of devices related to the pressure accumulating member 5. The air compressor 2 driven by the engine is connected to an air reservoir tank 30 as a pressure accumulating tank by a tube L2. A governor 2G for adjusting the discharge pressure is interposed.
[0023]
The tank 30 is connected to a brake or other air load 40 by a tube 30L. Further, the tank 30 is provided with a relief valve 32 for preventing overpressure.
In the tank 30 used as the air reservoir in the present example, the maximum pressure is set to “about 10 kg / cm ² ”, and the supply pressure of the pressure accumulating member 5 at that time is the first predetermined pressure, for example, “7.8 kg / cm ² ”. After entering the tank 30, the valve is closed at a ^second predetermined high pressure, for example, “9.2 kg / cm ² ” to maintain the tank 30 at an appropriate pressure without overpressure.
[0024]
The pressure accumulating member 5 is communicated with the tank L30 by a pressure tube L5 with a governor 10 interposed therebetween and communicated with the tube L2. The communication between the pressure accumulating member 5 and the tank 30 may be direct without the tube L2.
[0025]
FIG. 3 schematically shows a functional configuration of the pressure accumulating member 5.
A piston 7 is reciprocally fitted in the cylinder 6, and a compression chamber 6c is formed in the upper part of the cylinder 6. An intake valve 4f communicating with the atmosphere and a discharge valve 4r communicating with the air reservoir tank 30 in the compression chamber 6c. Is provided to perform a compressor function.
[0026]
The discharge valve 4r is configured to be urged in the valve closing direction by a valve spring 4k to open when the air pressure by the piston 7 is equal to or higher than a predetermined value, and is communicated with the tank 30 via a tube L5 equipped with the governor 10. .
[0027]
FIG. 4 shows the entire exterior of the pressure accumulating member 5 and its attachment to the vehicle.
A rod-shaped rod 6a is attached to the upper part of the cylinder 6, and a pair of annular members 14 formed of an elastic material is attached to the rod 6a. The annular members 14, 14 sandwich the horizontal portion 13h of the bracket 13 from above and below. Fixed.
[0028]
One of the annular members 14, 14 is seated on the washer 14b of the seat body 14B on the bracket 13 side, and the other is seated on the washer 14a and fastened with a nut 6c, and the cylinder 6 is solidly resiliently movable by elasticity. .
[0029]
The bracket 13 is formed in an inverted L shape, and a vertical portion 13v supporting a horizontal portion 13h is fixed to an outer portion 12a of the frame 12.
[0030]
An outer end portion 7a having an annular eyeball portion is attached to the outer end of the piston 7, and a cylindrical tubular member 16 made of an elastic material is attached inside the outer end portion 7a.
[0031]
The cylindrical member 16 is sandwiched between pin ends 26b of a pin 26a fixed to the front spring 26 by washers 16A, 16A, fastened by a nut 28, and solidifies a piston 76 by elasticity so as to be able to swing.
[0032]
The outer end 7a of the piston 7 may be attached at an appropriate position on the front axle 24 instead of the front spring 26 described above.
[0033]
The operation of the gas compression device having the above configuration will be described with reference to FIGS.
The road surface G. The suspension stroke changes due to vehicle vibration such as overcoming the unevenness of L, starting pitching at the time of braking, or rolling at the time of turning. Following the suspension stroke, the piston 7 of the pressure accumulating member 5 moves up and down to draw air from the intake valve 4f shown in FIG. 3 and discharge high-pressure air from the discharge valve 4r.
[0034]
The discharged high-pressure air is regulated by the governor 10 and supplied to the tank 30.
When the air pressure becomes equal to or lower than the ^second predetermined pressure, for example, “9.2 kg / cm ² ” due to the consumption of air, the tank 30 receives the high-pressure air supplied from the pressure accumulating member 5 and always has an appropriate capacity. It keeps high pressure air.
[0035]
As described above, the function of compensating for the shortage of the supply due to the operation of the air compressor 2 by the high pressure supplied from the pressure accumulating member 5 or reducing the load on the air compressor 2 to utilize the energy absorbed by the pressure accumulating member 5. I am wearing it.
[0036]
The difference in the movement between the sprung portion 17 and the unsprung portion 20 caused by overcoming unevenness of the vehicle, pitching at the time of starting, braking, or rolling due to lateral acceleration at the time of turning is determined by the position of the cylinder 6 and piston 7 of the pressure accumulating member 5. Although the difference causes a distortion in the upper and lower mounting portions, the elasticity of the annular members 14, 14 and the tubular member 16 absorbs this amount of distortion to ensure the strength of the pressure accumulating member 5 and does not impair the suspension function.
[0037]
In the above gas compression apparatus, only one side of the front shaft has been described. However, both sides are preferable from the viewpoint of the riding comfort in terms of balance. Note that this principle can also be applied to the rear axle.
[0038]
【The invention's effect】
The functions and effects of the present invention are listed below.
(A) According to the present invention, a cylinder of a pressure accumulating member that acts as a compressor is mounted on a spring, and a piston is mounted below a spring. And reduce the operating time of the air compressor.
(B) Accordingly, the life of the compressor is extended and the reliability is improved.
(C) A reduction in fuel consumption corresponding to a reduction in the operation time of the air compressor is achieved.
(D) If a pressure regulating valve is provided in the pressure tube between the pressure accumulating member and the pressure accumulating tank, there is no fear of causing a failure factor by applying an abnormal pressure to the related device.
(E) If the cylinder is mounted on the frame, there is no need to support the pressure accumulating member by installing a special strength member, and the mounting space is large and the arrangement is good.
(F) If the piston is mounted on the front spring or the front axle, there is no need to support the pressure accumulating member by installing a special strength member, and the mounting space is large and the arrangement is good.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of a gas compression device of the present invention.
FIG. 2 is a block diagram showing a relationship with the related device of the embodiment.
FIG. 3 is a schematic view of the pressure accumulating member of FIG.
FIG. 4 is an overall configuration diagram of a pressure accumulating member of FIG. 1;
FIG. 5 is a block diagram of a conventional pressure storage device.
[Explanation of symbols]
L5 Pressure tube 2 Compressor 4f Intake valve 4r Discharge valve 5 Accumulator 6 Cylinder 6a Rod 7 Piston 7a Outer end 10 Pressure valve 12, frame 17, sprung 20, unsprung 22, wheels 24, front axle 26, front spring 30, pressure accumulator tank (air reservoir)

Claims (5)

A cylinder swingably mounted on a spring of a vehicle body, a piston reciprocally mounted in the cylinder and having an outer end swingably mounted under the spring, and an intake provided in the cylinder A gas compression device comprising: a pressure accumulating member configured by a valve, a discharge valve biased by a valve spring, and a pressure accumulating tank that stores compressed gas generated by the pressure accumulating member. 2. A pressure regulating valve which opens at a first predetermined pressure and closes at a second predetermined pressure higher than the first predetermined pressure is provided in a pressure tube communicating the pressure accumulating member and the pressure accumulating tank. Gas compression equipment. 3. The gas compression device according to claim 1, wherein a sprung portion on which the cylinder of the pressure accumulating member is mounted is an outer surface of the frame. The gas compression device according to any one of claims 1 to 3, wherein an unsprung portion to which the outer end of the piston of the pressure accumulating member is attached is a front spring. The gas compression device according to any one of claims 1 to 3, wherein the unsprung portion to which the outer end of the piston of the pressure accumulating member is attached is a front axle.

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