JPH03103519A - Pavement cleaning vehicle - Google Patents

Abstract

PURPOSE:To enable execution of running and work through a single engine without any trouble by leading two propeller shafts through a clutch and a main transmission to an auxiliary transmission thereby forming a power transmission in an engine. CONSTITUTION:A propeller shaft 5 is extended from an engine to an auxiliary transmission through a main transmission, and formed with a first gear 14, a second gear 16, a first drive shaft 15, a third gear 23, a fourth gear 24, a second drive shaft 22 for driving running wheels, and a third drive shaft 27 driven with the aid of a hydraulic motor 29 and having a fifth gear engaged with a fourth gear. Through operation of a first shifter 17, the second gear 16 races with respect to the first drive shaft, and through operation of a second shifter 25, the third gear 23 is rotated integrally with the second drive shaft, and running wheels are driven by means of a propeller shaft 26. With this state, a blower is driven through a drive shaft 15 regardless of work and running, and a given suction rate is maintained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a road cleaning vehicle, specifically a road cleaning vehicle that can obtain driving and working power from one engine and can perform efficient work. About cars.

[Prior Art] In road cleaning vehicles, such as vacuum type road cleaning vehicles, it is necessary to maintain the suction performance (air volume, negative pressure) of the blower, which is the vacuum generation source, at a predetermined value and to improve work efficiency. They are required to be able to run slowly when there is a large amount of dirt, etc., and fast when there is a small amount of dirt, etc., and to be able to travel at the same speed as a regular truck when traveling outside of work such as forwarding.

In order to satisfy the above requirements, conventional road sweeping vehicles are equipped with a separate cleaning engine in addition to the so-called driving engine.

[Problems to be solved by the invention] The above-mentioned conventional road sweeping vehicle requires two engines, which increases the cost of materials such as parts and takes time to manufacture. ~I couldn't avoid the close-ups.

Furthermore, the increase in fuel efficiency due to the increase in vehicle weight could not be ignored.

Furthermore, there was a limit to low-speed driving when there was a large amount of dirt, etc.

In other words, in conventional road cleaning vehicles, when driving at low speeds, the transmission is set to low (LOW), and when lower speeds are required, the vehicle is driven in what is known as a half-clutch driving mode, or the clutch is operated on and off. The vehicle had to run inertia. However, the clutch driving operation described above accelerates clutch wear and damage. The present invention has been developed in view of the above circumstances, and is economical as it allows running and work to be done with a single engine, and is also efficient in that it can run at very low speeds without causing wear or damage to the clutch. The purpose is to provide an excellent road cleaning vehicle.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a first gear that rotates integrally with a propeller shaft provided from an engine via a clutch and a main transmission; a first drive shaft having a second gear that is meshed with the second gear and can freely rotate idly and integrally; a first drive shaft having an outlet for driving a blower and an outlet for driving a hydraulic pump; and a third gear that is meshed with the second gear and can freely rotate idly and integrally. A second gear, which is configured to freely rotate and integrally rotate like the third gear, has a fourth gear that can be switched alternately with the third gear, and further has a running wheel drive outlet. A power transmission device comprising a drive shaft and a third drive shaft driven by a hydraulic motor via the hydraulic pump and having a fifth gear meshed with the fourth gear. be.

[Function] Regarding the time of running other than work such as forwarding in the present invention, by operating the first shifter l7, the second gear 16 is placed in an idling state with respect to the l-th drive shaft l5, and the second By operating the shifter 25, the third gear 23 is controlled to rotate together with the second drive shaft 22. Therefore, the rotation of the engine 4 is as follows: clutch 10 main transmission II - propeller shaft 5 - first gear - 14 - second
The power is transmitted to the running wheels 13 through the gear 16, the third gear 23, the second drive shaft 22, and the second propeller shaft 26.

In this state, the first drive shaft 15 and the third drive shaft 27 are not rotated, so that the blower 6, the variable displacement hydraulic pump 21. The hydraulic motor 29 is also not driven, allowing the vehicle to run like a regular truck.

Next, when talking about work traveling, the first shifter 1
7, the second gear 16 is connected to the first drive shaft 15.
By operating the second shifter 25, the fourth gear 24 is switched to rotate together with the second drive shaft 22.

Therefore, the rotation of the engine 4 is controlled by: clutch lO - main transmission l1 - propeller shaft 5 - first gear - 14 - second gear - 16 - first drive shaft 15 - variable displacement hydraulic pump 21 - variable The power is transmitted to the running wheels l3 via a capacity type hydraulic motor 29, a third drive shaft 27, a fifth gear 28, a fourth gear 24, a second drive shaft 22, and a second propeller shaft 26. In this state, the blower 6 is driven by the first cantering shaft 15 regardless of the working speed, and a predetermined suction performance is maintained.

On the other hand, the running speed during work can be freely controlled by the variable displacement hydraulic motor 29, and extremely low speed running is also possible without controlling the clutch, which can improve the durability of the clutch. It is.

[Example] An example of the present invention will be described below in detail with reference to the drawings.

In Figures 1 and 2, l is the driver's seat, 2 is the dust collection hopper, 3 is the filter drum that captures minute dust, 4 is the engine, 5 is the propeller shaft, 6 is the blower, 7 is the suction device, and 8 is the Suction pipe, 9 is a side brush.

In the above configuration, the suction pipe 8 provided from the suction device 7
is guided to the dust collection hopper 2, and the dust swept to the center of the bottom of the vehicle body is sucked by the side brush 9, and the dust is transferred to the dust collection hopper 2.
It is collected by the department.

When the dust collection hopper 2 becomes dangerous, the dust collection hopper 2 is brought close to the rear of the dump truck (not shown), rotated forward from above the driver's seat 1, and then moved forward from above the driver's seat 1. The dump truck is then turned over and discharged by gravity into the box of the dump truck.

In the present invention, as shown in the third diagram, a propeller shaft 5 provided from an engine 4 via a clutch 10 and a main transmission 11 is guided to an auxiliary transmission 12, and a blower 6 and running wheels 13 are driven and controlled. .

Details of the auxiliary transmission l2 are shown in FIG. 4. 14
is a first gear that rotates integrally with the propeller shaft 5 provided from the engine 4 via the clutch IO and the main transmission 11.

A second gear 16 is meshed with the first gear 14 and is configured to be able to idle and rotate integrally with the first drive shaft 15 . Control of idle rotation and integral rotation of the second gear 16 with respect to the first drive shaft 15 is performed by operating a first shifter 17 provided on the first drive shaft 15,
It is operated so that it spins idly when it is running outside of work such as forwarding, and it is operated so that it rotates integrally when it is working.

Further, the l-th drive shaft 15 is provided with a blower drive outlet, specifically a pulley 18, and a pulley l9 on the blower 6 side is provided.
A belt 20 is suspended between.

Furthermore, a hydraulic pump drive outlet, specifically, a variable displacement hydraulic pump 2l driven by the first drive shaft 15 is connected to the first drive shaft 15 .

Next, the second gear 16 has a second drive shaft 22.
A third gear 23 is meshed with the third gear 23, which is configured to be freely rotatable and integrally rotatable.

Further, the second drive shaft 22 is provided with a fourth gear 24 which can be switched alternately with the third gear 23, which is configured to be able to freely rotate and integrally rotate like the third gear 23 described above. It will be done.

The alternating switching of the third gear 23 and the fourth gear 24 is performed by both gears 23. This is performed by a second shifter 25 provided on the second drive shaft 22 between 24 and 24, and is operated so that only the third gear 23 rotates integrally with the second drive shaft 22 during traveling other than work such as forwarding. The fourth gear is used during work.
24 is operated to rotate integrally with the second drive shaft 22.

Further, the second drive shaft 22 is provided with an outlet for driving the running wheels 13, specifically, a second propeller shaft 26. Furthermore, the fourth gear 24 is provided with a third drive shaft 27.
A fifth gear 28 provided at the front is engaged with the fifth gear.

This third drive shaft 27 is connected to a variable displacement hydraulic motor 29 driven by the variable displacement hydraulic pump 21.
are set up consecutively.

That is, this third drive shaft 27 is rotationally driven by a variable displacement hydraulic motor 29.

The variable displacement hydraulic motor 29 has a structure in which the rotational speed can be freely controlled, for example, a swash plate angle control type motor is used.

In the figure, reference numeral 30 denotes a hydraulic pump used for rotating and reversing the dust collection hopper 2, moving the suction device 7 up and down, and extending the side brush 9.

[Effects of the Invention] According to the present invention, it is possible to carry out towing and work with a single engine, which is economical, and it is possible to maintain a predetermined working capacity regardless of the traveling speed during work. ,
Furthermore, it is possible to travel at extremely low speeds, and the clutch is not worn or damaged even during extremely low speed travel.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a side view, FIG. 2 is a plan view, FIG. 3 is a schematic explanatory diagram, and FIG. 4 is a configuration diagram of the main parts. 4...engine, 5...peropershaft, 6. ．． ．． Blower, 10...Clutch, 11...Main transmission, 12...Sub-transmission,
13... Running wheel, l4... First gear 15... First drive shaft, 16... Second gear-17
...First chic, 21...Variable displacement hydraulic pump, 22...Second sliding shaft, 23...Third gear 24...Fourth gear, 25...・Second chic, 2
7...Third drive shaft, 28...Fifth gear 2
9...Variable displacement hydraulic motor.

Claims (1)

[Claims] A first gear that rotates integrally with a propeller shaft provided from the engine via a clutch and a main transmission, a second gear that is meshed with the first gear and can freely rotate and rotate together, a blower drive outlet, and a first drive shaft having an outlet for driving a hydraulic pump; a third gear that is meshed with the second gear and can freely rotate and rotate together; , the third
The fourth gear is driven by a hydraulic motor via the hydraulic pump, a second drive shaft having a running wheel drive outlet, and a fourth gear that can be switched alternately with the fourth gear.
A road cleaning vehicle having a power transmission device comprising a third drive shaft having a fifth gear meshed with the first gear.