摘要:
A planetary transmission includes a first gear set including a first sun gear and at least one first planetary gear in meshing arrangement with the first sun gear, a second gear set including a second sun gear and at least one second planetary gear in meshing arrangement with the second sun gear, a casing surrounding the first gear set and the second gear set, a first thrust washer between the first sun gear and the second sun gear, a second thrust washer between the second sun gear and the casing, and a lubrication system. The lubrication system comprises a passageway extending through the casing and placing a hollow interior of the second sun gear in fluid communication with a mesh point between teeth of the second sun gear and teeth of the at least one second planetary gear, such that when oil is forced from the mesh point the oil travels through the passageway, into the hollow interior of the second sun gear, and into contact with the first and second thrust washers.
摘要:
In a vehicle in which an engine output power is transmitted to front and rear wheels through a transmission and an inter axle differential, a wheel lock prevention device is provided. The wheel lock prevention device comprises a differential lock mechanism for locking the inter axle differential, a detection element for detecting a wheel lock state of the front and rear wheels, and an operation element for operating the differential lock mechanism so as to lock the inter axle differential by operating the differential lock mechanism upon the detection of the wheel lock state.
摘要:
An automatic retarder controller for a vehicle, which can prevent overheating, and can more precisely control the vehicle speed to remain constant. For this purpose, in the automatic retarder controller which is mounted on a load-carrying vehicle together with a cooled retarder (31) for exerting a braking force in response to a driving signal, and which automatically controls the driving signal so that the slope descending speed of the vehicle remains nearly constant, a detector for detecting the loading weight of the vehicle is included, and the controller impresses the gain corresponding to the detected loading weight upon the driving signal while the controller controls the vehicle speed to remain constant.
摘要:
A suspension, for use on a construction machine, to provide excellent riding comfort, ease of operation, and stability, and a control method for controlling this suspension. The suspension has front suspension cylinders mounted on the front sides of a vehicle for absorbing a vibration of front-wheel tires, rear suspension cylinders mounted on the rear sides of the vehicle for absorbing vibration of rear-wheel tires, and an accumulator connected to the front suspension cylinders through an electromagnetic change-over valve, the suspension including a vehicle speed sensor (11) for sensing a speed of the vehicle, an electromagnetic change-over valve (6) arranged between the front suspension cylinder and an accumulator (7) and connected to a controller (10), and the controller (10) for outputting, based on a signal received from the vehicle speed sensor (11), an operation signal to the electromagnetic change-over valve (6) such that the front suspension cylinders communicate with the accumulator in order to absorb the vibration of the tires of the vehicle.
摘要:
Maintenance due times of components of a machine are determined according to the status of user-performed in-house maintenance and according to the occurrence of abnormalities during machine operation. A subtraction point (20 points) associated with an abnormality (overheating) detected during machine operation is subtracted from the score (80 points) of a corresponding component (engine) in the machine. An addition point (50 points) associated with the type of maintenance (overhaul performed by in-house maintenance) indicated in maintenance information is added to the score (80 points). Thus, at the time where the value resulting from subtractions from and additions to the score for that component (engine) reaches a prescribed value (10 points) indicating maintenance due time, it is determined that the maintenance due time for that component (engine) has been reached.
摘要:
The present invention enables a reliable radio communication between a plurality of dump trucks and loaders, improves operability, and can flexibly cope with movement of the dump truck during the loading operation. To this end, a loader selecting means (2) is provided for each dump truck, and a plurality of channels are provided for each dump truck controller (6) and each loader controller (35), the dump truck controller (6) inputs a loader selection signal from the loader selecting means (2), and selects, from a plurality of channels, a channel available for communicating with the loader controller (35) corresponding to the loader selection signal to transmit a load weight value, and the selected loader controller (35) receives the load weight value on the channel available for communications, and displays the received load weight value on a weight display means (32).
摘要:
In a four-wheel drive traveling system for a tipper, an output side of an engine is connected to rear wheels via a power transmission, at least one variable hydraulic motor for driving the front wheels and a hydraulic pump driven by the engine are provided, and the variable hydraulic pump and the variable hydraulic motor are connected into a closed circuit. The system includes arrangements for controlling displacement of the variable hydraulic pump, for detecting slippage of the rear wheels, for setting a discharge pressure of the hydraulic pump between a high pressure and a low pressure, and for controlling the displacement of the variable hydraulic pump so that the discharge pressure is a low pressure while slippage is not caused for the rear wheels and so that the discharge pressure is a high pressure while slippage is caused for the rear wheels.
摘要:
Performance data of components of a construction machine is measured by the steps of automatically operating the component mounted to the construction machine so as to satisfy one of a plurality of measurement conditions which are preliminarily set, automatically measuring performance data of the component which is preliminarily set under the above automatically operated state, and successively performing the same steps as those defined above with respect to remaining measurement conditions other than the above-mentioned one measurement condition, thus measuring the performance data of the component with one or more than one measurement conditions.
摘要:
A front and rear wheel load distribution control unit which provides excellent driving operability of a coupled vehicle and improves durability of a driving unit. To this end, the control unit is a front and rear wheel load distribution control unit for a coupled vehicle with a front vehicle (1) and a rear vehicle (3) being coupled, including an inter-axle differential lock (71) between a front axle (91) and a rear axle (92) for eliminating a rotational differential between the front axle (91) and the rear axle (92), and includes a crossing angle detecting sensor (33) for detecting a crossing angle of the front vehicle (1) and the rear vehicle (3), a front axle rotation sensor (31) for detecting rotation of the front axle (91), a rear axle rotation sensor (32) for detecting rotation of the rear axle (92), and control means (20, 20a, 20b, 36) for operating the inter-axle differential lock (71) in response to a crossing angle signal from the crossing angle detecting sensor (33), a rotation signal from the front axle rotation sensor (31), and a rotation signal from the rear axle rotation sensor (32).
摘要:
A brake diagnosis apparatus for a self-propelled vehicle can secure the safety of the brake and the productivity of mining and quarrying and can detect widely applicable data including the history. In order to achieve this, there is provided oil temperature detecting means (23) for detecting a cooling oil temperature d immediately after the oil cools a brake; holding time calculating means, for receiving the cooling oil temperature d from the oil temperature detecting means and for calculating a holding time t thereof; and a first adding means (31a), having stored therein a first matrix A, which is sectioned in vertical and horizontal directions at every predetermined cooling oil temperature area and at every predetermined holding time area, for receiving the cooling oil temperature d from any one of the oil temperature detecting means and the holding time calculating means, for receiving the holding time t from the holding time calculating means, for adding a frequency of occurrence value An to the area of the first matrix A which includes the cooling oil temperature d and the holding time t, and for freely outputting the added value to an outer portion.