JPH10129336A - Service car for tire repair and the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To repair or replace a tire with low noise by suppressing the number of revolutions of an engine serving as a driving source for an air compressor. SOLUTION: Without connecting a power takeoff device 15 directly to an air compressor 13, a hydraulic pump 17 is driven firstly so as to actuate a hydraulic motor 18. The hydraulic motor 18 drives the air compressor 13. The hydraulic pump 17 and the hydraulic motor 18 are driven by means of a running engine for a vehicle via the power takeoff device 15, and by means of the rotation of the hydraulic motor 18, the air compressor 13 is actuated so as to supply air, so that the number of engine revolutions can be suppressed low. Therefore, work can be carried out very quietly, so that noise problem can be prevented even when work is carried out in a town or in the night.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a service car which can perform service work such as tire repair and replacement.

[0002]

2. Description of the Related Art In general, when repairing a puncture of tires or replacing the tires, the entire vehicle is carried to a repair shop, but special vehicles for civil engineering, construction, and large vehicles such as trucks and buses. If this is the case, it is very difficult to carry it into a repair shop, and conversely, it is necessary to go to the site and provide services such as repair. However, it is not easy to repair large tires simply by carrying tire repair props, but it is almost impossible.Recently, a complete set of machinery and tools required for tire repair and replacement has been loaded. A service car is being used.

[0003] A "tire repair / replacement vehicle" disclosed in Japanese Utility Model Laid-Open No. 2-78434 is one of them, and a conventional service car is a power generator, a compressor, a tire changer, a tire balancer machine, and a puncture repair machine. It carries printing machines, grinders, etc. Therefore, the service car loaded with the various devices described above can go to a predetermined site and perform a service operation using necessary machines and equipment. However, the conventional service car has a power generator mounted thereon and drives a compressor or a tire changer using electric power generated by the power generator. The operation of the generator for use is noisy, so that the noise becomes a problem especially during service work in a city area or at night. Also, when the air compressor is driven, a loud noise is generated, which is a problem together with the generator.

[0004] In order to reduce the noise and to allow the user to work quietly even in a residential area at night, even in an urban area, the Applicant has issued a “Tires” on July 6, 1991. The company has filed an application for the registration of a utility model for a "service car for repair and the like" (Japanese Utility Model Application Laid-Open No. 5-5568). The service car for repairing tires and the like is a service car in which a box is mounted on a truck bed and machines and instruments required for work such as tire repair and replacement are loaded on the bed. A soundproof type power generator is used as a power supply device for driving various machines, and a power take-out device is provided for obtaining power required for driving an air compressor from a vehicle driving engine. A power gate is attached to the back, and a side door that can be fully opened is attached to the side. "

[0005]

As described above, the conventional tire repair service car uses a soundproof type generator, and the drive of the air compressor is obtained from the vehicle engine. In this case, if the rotation speed of the air compressor is 1000 rpm, the rotation speed of the engine is 20 rpm.
00 rpm is required, and as a result, there remains a problem of noise generated from high-speed rotation of the engine. The problems to be solved by the present invention are these problems. To provide a service car capable of performing a quiet operation by suppressing the engine speed, which is a drive source of the air compressor, to be low.

[0006]

The service car of the present invention is capable of repairing and replacing tires with low noise, and is characterized in that the air compressor is driven quietly. That is, the hydraulic pump is driven by the engine without directly obtaining power from the traveling engine, and the hydraulic pump is used to rotate the hydraulic motor. The air compressor is driven using the hydraulic motor as a power source.

As described above, in the present invention, the air compressor is driven with the hydraulic pump and the hydraulic motor interposed therebetween, and the main shaft of the hydraulic pump meshes with the transmission gear of the engine. Therefore, even when the air compressor rotates at 1000 rpm, the rotation speed of the engine is improved at about 1000 rpm. Less than,
Embodiments according to the present invention will be described in detail with reference to the drawings.

[0008]

1a, 1b and 1c are external views showing a service car for repairing tires and the like according to the present invention. This service car is a truck in which a box 1 is mounted on a carrier, and a set of machines and equipment required for repairing and replacing tires are loaded in the box 1. A power gate 2 is attached to the lower rear of the box 1 and a rear door 3 is attached to the upper side. If the power gate 2 and the rear door 3 are opened, the rear of the box 1 is fully opened. The power gate 2 is configured to open and close by hydraulic pressure, and also function as a lifter for placing a repair tire on a carrier.
The rear door 3 is manually opened and closed, and a gas damper is attached so that the once opened rear door 3 is not closed by itself.

A side door 4 is provided on one side of the box 1.
5 and a hydraulic cylinder 6 is attached to the upper side door 4.
And a gas damper is provided, and the opening and closing of the side door 4 is performed by the operation of the hydraulic cylinder 6. Further, the lower side door 5 is manually opened and closed, and is connected with a hook for keeping the same surface as the cargo bed when it is folded down, and is supported by the hook. Further, a fluorescent lamp 7 is arranged on the ceiling of the box 1 so that work can be performed even at night.

By the way, FIG. 2 shows various machines and instruments loaded on the carrier of the box 1, in which 8 is a soundproof power generator, 9 is a wheel balancer, , 11 is a tire changing machine, and 12 is an air filling machine. The soundproof power generator 8 is provided with a diesel engine, and its surroundings are surrounded by a soundproof material so that no loud noise from the engine is emitted to the outside.
The electricity generated by the generator 8 is supplied to a wheel balancer 9.
And used as power for the tire changing machines 10 and 11.

Air is used not only in the air filling machine 12 but also in the tire changers 10 and 11, and the air sent to these various machines is an air compressor 13.
The air compressor 13 of the present invention is mounted on the lower part of the cargo bed and operates by receiving power from a traveling engine of the vehicle. FIG. 3 shows a power take-off device (PTO) 15 attached to a transmission 14 of a vehicle.
And drive. Reference numeral 16 denotes an air tank, and compressed air from the air compressor 13 is stored in the air tank 16.

As described above, the air compressor 13 is driven via the power take-off device 15. In the present invention, the hydraulic pump 17 is driven first without directly connecting the power take-off device 15 to the air compressor 13. The hydraulic pump 17 rotates a hydraulic motor 18. Then, the hydraulic motor 18 drives the air compressor 13.

FIG. 4 is a hydraulic circuit diagram when the air compressor 13 is driven by the power take-off device (PTO) 15. Hydraulic oil is sucked up from the oil tank 19 by the hydraulic pump 17 and sent out to the hydraulic motor 18, and the hydraulic oil discharged from the hydraulic motor 18 returns to the oil tank 19 again. When a certain load or more acts on the hydraulic motor 18, the pressure regulating valve 20 operates and the hydraulic oil flows to the oil tank 19,
Further, a cooler 21 is provided for cooling the hydraulic oil.
As described above, the service car for tire repair and the like according to the present invention is loaded with devices and generators necessary for operations such as tire attachment and detachment, and drives the hydraulic pump and the hydraulic motor using the power of the engine. The air compressor is rotated by a hydraulic motor, and the following effects can be obtained.

[0014]

As described above, the service car of the present invention is used for repairing tires.
Since a set of machinery and equipment required for replacement work is loaded, it is possible to go directly to the site to perform tire repair work. In addition, this service car is provided with a lifter at the rear of the box, and the side doors can be fully opened, thereby facilitating workability.

Further, electric power for driving various machines is supplied from a soundproof type power generator, and a hydraulic pump and a hydraulic motor are driven from a traveling engine of the vehicle via a power take-off device, and the rotation of the hydraulic motor is controlled. In order to supply the air by turning the air compressor, the number of revolutions of the engine can be kept low. For example, when the rotation speed of the air compressor is 1000 rpm, the engine rotation speed may also be 1000 rpm. Therefore, it is possible to work very quietly, and there is no noise problem even when working in the city or at night.

[Brief description of the drawings]

FIG. 1 is an external view showing a service car of the present invention.

FIG. 2 shows tire repair machinery arranged on a box carrier.

FIG. 3 is a power take-out device.

FIG. 4 is a hydraulic circuit for turning an air compressor.

[Explanation of symbols]

 1 Box 2 Power Gate 3 Rear Door 4 Side Door 5 Side Door 6 Hydraulic Cylinder 7 Fluorescent Light 8 Soundproof Power Generator 9 Wheel Balancer 10 Tire Changer 11 Tire Changer 12 Air Filling Machine 13 Air Compressor 14 Transmission 15 Power take-off device 16 Air tank 17 Hydraulic pump 18 Hydraulic motor 19 Hydraulic tank 20 Pressure regulating valve 21 Cooler

Claims (2)

[Claims] Claims 1. A box is mounted on a truck bed,
In a service car loaded with machines and equipment required for work such as tire repair and replacement on the carrier, a power take-out device for obtaining power required to drive an air compressor from a traveling engine of the vehicle. A service car for tire repair or the like, wherein a hydraulic pump is driven by the power take-off device, the hydraulic pump rotates a hydraulic motor, and the air compressor is driven by the hydraulic motor. 2. A box is mounted on a truck bed,
In a service car loaded with machines and equipment required for work such as tire repair and replacement on the carrier, a power take-out device for obtaining power required to drive an air compressor from a traveling engine of the vehicle. A hydraulic pump is driven by the power take-off device, the hydraulic pump rotates a hydraulic motor, and the air compressor is driven by the hydraulic motor, and a power supply device for driving the various machines A service car for tire repair and the like, which is equipped with a soundproof power generator.