Komatsu Corporation

Shu Takeda

Masanori Tojima

Koji Takeda

Kazuo Matsuda

Masato Kageyama

Tomonori Ozaki

Takehiro Komatsu

Kiyoshi Kaneko

Shinichi Naito

Kyousuke Moriguchi

Megumi Hiyoshi

A transmission includes an input shaft, an output shaft, a first planetary gear mechanism, a second planetary gear mechanism, and a first variable device. The first planetary gear mechanism includes a first carrier connected to the input shaft, a first planetary gear connected to the first carrier, a first sun gear connected to the first planetary gear, and a ring gear connected to the first planetary gear. The second planetary gear mechanism includes a second sun gear connected to the first carrier, a second planetary gear connected to the second sun gear, and a second ring gear connected to the second planetary gear and connected to the first ring gear. The first variable device is connected to the first ring gear and the second ring gear to continuously change a speed ratio of the output shaft to the input shaft.

Transmission and work vehicle

To measure the loaded weight of a dump truck, accurately and inexpensively. In a dump truck comprising a set of equalizer bars respectively provided rotatably on the left and right-hand sides of a vehicle body; first vehicle wheels supported respectively by means of first suspension devices on one side of each equalizer bar; second vehicle wheels supported respectively by means of second suspension devices on the other side of each equalizer bar; and third vehicle wheels provided respectively on the left and right-hand sides of the vehicle body separately from the equalizer bars, and being supported respectively by means of third suspension devices; a first load applied to the second suspension device is detected; a second load applied to the third suspension device is detected; the angle of inclination of the vehicle body is detected; and a loaded weight is calculated on the basis of the first and second loads, and the angle of inclination.

Loaded weight measurement method and loaded weight measurement device for dump truck

To measure loaded weight in respective work statuses of a dump truck. The loaded weight of a dump truckis calculated and stored at prescribed time intervals. It is judged whether or not the dump truckhas transferred to a transporting status (S-S), and if it has transferred to a transporting status (S: YES, S: YES, S: YES), then the transported weight Gat the end of loading and immediately before transition to the transporting status is calculated and stored (S). The transported weight Gduring the period in which the truck is in the transporting status is also calculated and stored (S). If the truck has transferred from the transporting status to an unloading status (S: YES), then the transported weight Gbefore unloading is calculated and stored (S). A transported weight selected from these respective transported weights G-Gis read out and output to a display device, or the like (S, S). Thereby, it is possible to measure the transported weight at a previously established plurality of measurement timings.

To measure the loaded weight of a dump truck, accurately and inexpensively. In a dump truck comprising a set of equalizer bars respectively provided rotatably on the left and right-hand sides of a vehicle body; first vehicle wheels supported respectively by way of first suspension devices on one side of each equalizer bar; second vehicle wheels supported respectively by way of second suspension devices on the other side of each equalizer bar; and third vehicle wheels provided respectively on the left and right-hand sides of the vehicle body separately from the equalizer bars, and being supported respectively by way of third suspension devices; a first load applied to the second suspension device is detected; a second load applied to the third suspension device is detected; the angle of inclination of the vehicle body is detected; and a loaded weight is calculated on the basis of the first and second loads, and the angle of inclination.

An unmanned vehicle running system, capable of reducing a stop time of a vehicle by immediately judging whether or not an obstacle blocks the passage when detecting the obstacle. For this purpose, the unmanned vehicle running system has a plurality of vehicles (,) running without a driver in a predetermined course (,) while detecting the current position and a central monitor station (,) for monitoring operations of the plurality of vehicles, wherein each of said vehicles is provided with a phototaking device (,) for taking a photo of the course, with a vehicle communication unit (,) for transmitting the taken image to the central monitor station, and with an obstacle detecting unit (,) for detecting an obstacle (,) which blocks the passage, wherein the central monitor station is provided with a central communication unit (,) for receiving the image and with a monitor (,) for displaying the image, and wherein the phototaking device takes a photo when the obstacle detecting unit detects an obstacle.

Unmanned vehicle running system

The present invention prevents the interference of vehicles traveling on-coming to each other when a plurality of vehicles are traveling on-coming to each other on a traveling path with a predetermined road width without increase in cost caused by setting a wide course width and without a drop in work efficiency caused by decreasing velocity. If one of the vehicles detects the other vehicle by its obstacle detection means when the vehicles are traveling on-coming to each other, the vehicle which detects the other vehicle begins deceleration to stop itself. At the same time, this vehicle transmits a deceleration control command for stopping the other vehicle to the other vehicle via transmission/reception means, therefore the other vehicle starts deceleration even if this vehicle cannot detect an obstacle. The present invention is also applied when unmanned vehicles using autonomously guidance traveling based on the course data and traveling position data or an unmanned vehicle and a manned vehicle pass each other on the going and coming paths immediately adjacent to each other, where each vehicle has communication means for transmitting traveling position data of the respective vehicle and receiving traveling position data of the other vehicle, an unmanned vehicle has approach detection means for detecting the approach of the other vehicle based on its own traveling position data and position data of the other vehicle, and traveling control means for shifting its own vehicle toward the road shoulder side at detection of an approach.

Interference preventing device for vehicle

An automatic excavator for automatically excavating an excavation object and loading a loading object with the result excavation by utilizing a measuring instrument for determining the distance between the excavator and the excavation object and the loading object, an excavation object recognition system for recognizing a three-dimensional shape of the excavation object on the basis of an output from the measuring instrument, a target excavation position computing system for computing the target excavation position on the basis of the three-dimensional shape of the recognized excavation object, a target loading position computing system for computing a relative position of the loading object with respect to the excavator and a relative attitude of the excavator with respect to the loading object on the basis of an output from the measuring instrument, and computing a target loading position on the basis of the computed relative position, an automatic positioning system for automatically positioning the excavator in the computed target excavation position and the target loading position, an automatic excavation control system for automatically excavating the excavation object in the target excavation position, and an automatic loading control system for automatically loading the loading object with the excavation in the target loading position, whereby a series of operations from evacuation to loading can be carried out automatically and efficiently by using one automatic excavator.

Growing community of inventors

Tochigi, Japan

Shu Takeda