JP3039394U - Road cutting car - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a self-propelled road surface cutting vehicle which is capable of self-propelling on a public road at high speed and at the time of working, can perform ultra-low speed (fine speed) required for cutting. . SOLUTION: An all-wheel drive type vehicle in which a driving force from a running engine 11 is shifted by a transmission device 14 and further transmitted to all wheels by a transfer device 16, and a cutter provided on the vehicle for cutting a road surface. The road surface cutting machine 30 in which the portion 34 moves up and down between the bottom of the loading platform and the road surface
And the inner pinch PTO 26, which is provided at the front stage of the transmission device 14 and accelerates and takes out the rotation from the top gear shaft connected to the running engine 11,
Low speed engine 2 that drives 26 from outside during road surface cutting
1 is provided.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a road surface cutting vehicle equipped with a road surface cutting machine that scrapes off bumps and the like generated by rutting on a road surface.

[0002]

[Prior art]

 At present, rutting on the road surface causes traffic accidents, vibrations and noises, and water splashes on pedestrians. For this reason, road surface cutting machines have been proposed that eliminate ruts and ensure safe and smooth communication. Since the conventional road surface cutting machine itself has an extremely low traveling speed, it cannot travel on a public road by itself and must be transported to the work site by a truck.

[0003]

[Problems to be solved by the device]

 However, conventional road surface cutting machines load and unload on-site, which prolongs traffic regulation time and prolongs traffic congestion.

Therefore, the present invention provides a self-propelled road surface cutting vehicle which is capable of self-propelling on a public road at high speed and is capable of traveling at an ultra-low speed (fine speed) necessary for cutting during work. This is an issue.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the invention of claim 1 provides an all-wheel drive type vehicle in which the driving force from a running engine is changed by a transmission device, and is further transmitted to all wheels by a transfer device. A road surface cutting machine that is provided and has a cutter that moves up and down between the underside of the loading platform and the road surface, and rotation from the top gear shaft that is installed in front of the transmission device and is connected to the running engine. Is provided with an intermediate pinching power take-off device and a fine speed drive device for driving the intermediate pinching power take-out device from the outside during road surface cutting.

According to a second aspect of the present invention, in the road surface cutting vehicle according to the first aspect, in the road surface cutting machine, the cutter portion rotates in a direction opposite to a rotation of drive wheels of the vehicle. .

[0007]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings. 1 and 2 are a side view and a plan view showing an embodiment of a road surface cutting vehicle according to the present invention, and FIG. 3 is a schematic view showing a drive system of the road surface cutting vehicle according to the present embodiment. This road surface cutting vehicle 1 is an all-wheel drive vehicle in which front and rear wheels are drive wheels, and a road surface cutting machine 30 is provided in a chassis portion 2 between front wheels and rear wheels.

The road surface cutting machine 30 is a machine for scraping off bumps and the like generated by rutting on the road surface, and is a parallel link consisting of a bracket 31 provided on the chassis portion 2 and four links provided on the bracket 31. The mechanism 32, an elevating head section 33 provided at the other end of the parallel link mechanism 32, a cutter 34 built in the elevating head section 33, an elevating drive section 35 for vertically moving the elevating head section 33, and a cutter 34. It is provided with a cutter drive unit 36 that is rotationally driven.

The cutting speed of the road surface cutting machine 30 is preferably about 1 to 5 m / min from the viewpoint of work safety, and a stable low speed of 50 to 100 m / min which is usually obtained at the first speed stage of a truck. It is necessary to further reduce min to 1/20 or less. Therefore, it is necessary to install a fine speed reducer between the transmission (T / M) and the drive shaft.

In the road surface cutting machine 30, the rotational direction of the cutter at the time of cutting is a direction that hinders the progress of the cutting machine 30, and a large driving force is required to overcome the reaction force and proceed. Thus, in order to exert a large driving force, the driving wheel 3 needs to have a sufficient frictional force with respect to the road surface. Further, it is desirable that the road surface cutting machine 30 be as small and lightweight as possible and have a small turning effect. Therefore, the road surface cutting vehicle 1 is preferably an all-wheel drive vehicle having a large number of drive axles.

When the road cutting vehicle 1 is an all-wheel drive vehicle, as shown in FIG. 3, the driving force of the vehicle engine 11 is applied to the flywheel 12, the clutch 13, the transmission (T / M) 14, and the transmission (T / M) 14. It is connected to a transfer device (T / F) 16 via a shaft 15. The T / F 16 distributes the driving force from the vehicle engine 11 to the final reducer 18 of each wheel 3 via the shafts 17 and 17-1.

As described above, the T / F 16 is provided between the T / M 14 and the final reduction gear 18. Therefore, there is no space to install the above-mentioned slow speed reducer. If the wheelbase is extended in order to secure the installation space, the total length of the vehicle will increase and the small turning will not work. Therefore, it is preferable to provide a speed reducer on the input side of the T / M 14.

Therefore, in the present embodiment, it is generally used for driving a water pump of a diesel fire fighting pump vehicle, and a center pinch power extraction device (hereinafter referred to as center pinch PTO) mounted between the clutch 13 and the T / M 16 is used. 26) will be provided. Therefore, the power transmission system after T / M14, which is used for normal traveling, does not have to be modified.

The center pinch PTO 26 generally has a speed increasing ratio of about 1.2 with respect to the vehicle engine 11. However, in the present embodiment, the output of the hydraulic motor 24 is connected to the output shaft of the center pinch PTO 26 via the universal joint 25. Therefore, the center pinch PTO 26 works as a speed reducer of about 1.2 with respect to the hydraulic motor 24.

With the above configuration, deceleration by the sandwiched PTO 26 1.209 T / M 14 deceleration (first speed gear ratio) 6.378 T / F 16 deceleration (usually about 1: 2) 2.091 Final reducer 18 (Normally about 1: 5) The output torque of the hydraulic motor 24 is transmitted to the drive wheels 3 after all deceleration of 5.125 (82.6).

The hydraulic motor 24 is driven by a hydraulic pump 22 that rotates with another engine 21. If the hydraulic pump 22 or the hydraulic motor 24 is of a variable displacement type, the rotational speed of the hydraulic motor 24 can be continuously varied from 0 to a predetermined speed. Therefore, it is possible to easily obtain an extremely low speed and a very low speed during work. In addition, since the hydraulic drive is used, by limiting the hydraulic pressure, it is possible to easily limit the torque applied to the drive system to within a certain allowable limit when traveling at a very low speed.

In the road cutting vehicle 1 of the present embodiment, during normal traveling, if the center pinch PTO 26 is disconnected and the clutch 13 is engaged, the vehicle engine 11, the T / M 14, the T / F 16, and the final reduction gear 18 cause High-speed running as a normal truck becomes possible.

On the other hand, at the time of cutting the road surface, the clutch 13 of the vehicle engine 11 is disengaged so that the connection with the T / M 14 is disconnected. The low-speed engine 21 rotates the hydraulic pump 22, and the hydraulic motor 24 drives the center pinch PTO 26 from the outside to perform low-speed running. At this time, the road surface cutting machine 30 lowers the head portion 33 to the road surface by the head elevating device 35 and rotates the cutter 34 by the cutter driving device 36 to cut the road surface.

(Mounting Position of Road Surface Cutting Machine) In the present embodiment, the road surface cutting machine is provided in the middle of the vehicle distance, but it may be provided in the vehicle front surface or the vehicle rear surface. However, when a road surface cutting machine is installed on the front of the vehicle, the front axle load during forwarding is too large, there are protrusions on the front during forwarding, making it difficult to drive. There is a shortage, the resistance of the cutter is lost, and the direction of travel tends to be uncertain, which interferes with front lighting such as headlights and does not comply with safety standards. It is difficult to reinforce, the front and rear wheels tread after cutting, the total length of the vehicle becomes long, and so on.

Further, when a road surface cutting machine is provided on the rear surface of the vehicle, the rear axle load at the time of forwarding becomes too large, there is a protrusion on the rear surface at the time of forwarding, it is difficult to drive, and the front wheel load becomes too large at the time of work. Therefore, it tends to exceed the allowable limit of the front axle, and it interferes with rear lighting such as brake lights and tail lights, license plates, etc.Therefore, there is a drawback that these modifications are required and the total vehicle length becomes long. .

On the other hand, in the case where the road surface cutting machine is provided in the middle of the axial distance as in the present embodiment, the distribution of the front and rear axial loads at the time of forwarding can be appropriately selected, and the operation at the time of forwarding can be performed normally. It has the following advantages: easy to drive, easy to maintain front wheel load during work, good running stability, no obstruction to lighting, and proper cutting of rear wheel after cutting. In other words, because the vehicle is compact, it is easy to drive during forwarding, the vehicle is well balanced during forwarding work, and it is easy to modify, it is necessary to install a road surface cutting machine in the middle of the vehicle distance. did.

(Cutter Pressing Method) In this embodiment, a method of moving the road surface cutting machine 30 up and down with respect to the vehicle body is adopted. However, the road surface cutting machine 30 is fixed to the vehicle body and the vehicle body is moved up and down with respect to the road surface. It is also possible. However, in the latter case, the lifting stroke of the vehicle body which secures a clearance between the road surface cutting machine 30 and the road surface during forwarding and which has a biting depth into the road surface during work becomes large. This stroke is not available with truck chassis suspensions. Therefore, it is necessary to fix the suspension of the track chassis in order to keep the depth of penetration of the road surface cutting machine 30 into the road surface constant, but the former method was adopted because it is technically relatively easy. .

(Reason for not adopting the new transmission) It is conceivable to add a transmission to the traveling mechanism of the 4-ton truck, which is the base chassis of the road surface cutting vehicle 1 of the present embodiment, but in that case, 1 / It is necessary to provide a new transmission with a two-speed transmission of 30 and 1/1. Since a new transmission is added between the transmission and the auxiliary transmission, the vehicle distance becomes longer by about 1 m and the total vehicle length also becomes longer. However, the torque applied to the drive system after the new transmission becomes too large during work, and there is a problem in strength. Therefore, it is not preferable to add a new transmission.

[0024]

EFFECTS OF THE INVENTION As described above, according to the present invention, it is possible to run at a very low speed during road surface cutting work and at a high speed during forwarding. Moreover, there is an effect that the drive system is not overloaded and the axial distance and the total length are not increased.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a road cutting vehicle according to the present invention.

FIG. 2 is a plan view showing an embodiment of a road cutting vehicle according to the present invention.

FIG. 3 is a schematic diagram showing a drive system of a road surface cutting vehicle according to the present embodiment.

[Explanation of Codes] 1 Road cutting car 2 Chassis part 3 Wheels 11 Vehicle engine 12 Flywheel 13 Clutch 14 Transmission (T / M) 15 Shaft 16 Transfer device (T / F) 17 Shaft 18 Final reducer 21 Fine speed engine 22 Hydraulic pump 24 Hydraulic motor 25 Universal joint 26 Sandwiching PTO 30 Road surface cutting machine 31 Bracket 32 Parallel link mechanism 33 Lifting head section 34 Cutter 35 Lifting drive section 36 Cutter drive section

Claims (2)

[Utility model registration claims] 1. An all-wheel drive type vehicle in which a driving force from a running engine is shifted by a transmission device and is further transmitted to all wheels by a transfer device, and a cutter portion provided in the vehicle for cutting a road surface. A road surface cutting machine that moves up and down between the underside of the loading platform and the road surface, and an intermediate pinching power extraction device that is provided in a front stage of the transmission device and accelerates and extracts rotation from a top gear shaft that is connected to the traveling engine. A road surface cutting vehicle provided with a fine speed drive device for driving the inside pinching power takeoff device from the outside during road surface cutting. 2. The road surface cutting vehicle according to claim 1, wherein the cutter of the road surface cutting machine rotates in a direction opposite to a rotation of a drive wheel of the vehicle.