Abstract: There is provided a dump truck that, when drive wheels (6) slip, is capable of reducing braking torques for the drive wheels (6) to avoid locking of the drive wheels (6), and of generating braking torques for driven wheels (7) to ensure an overall braking torque for the vehicle.

Abstract: When regeneration operation is being performed, electric power on a main-machine side is supplied to an auxiliary-machine side, a voltage on the auxiliary-machine side is controlled to become a first voltage value predetermined on the basis of operating voltage specifications of an auxiliary apparatus, a generator on the auxiliary-machine side is deactivated to stop supply of electric power to the auxiliary-machine side, and electric power on the auxiliary-machine side is supplied to a power storage apparatus.

Abstract: To provide an electric vehicle capable of reducing heat generation of the switching elements while achieving energy saving, the electric vehicle includes: an engine 11; a first generator 12 driven by the engine; a first rectifier circuit 14 connected to the output of the first generator; a first DC line 16 to receive the DC output of the first rectifier circuit; a driving motor 10 connected to the first DC line; a power converter 20 configured to convert voltage of the first DC line; a second DC line 34 to receive the DC output subjected to voltage conversion by the power converter; an auxiliary device 33 connected to the second DC line; and a controller 40 configured to control the power converter.

Abstract: A dump truck pitching control system that can improve the ride quality of a vehicle body and the drive stability during traveling is provided. The present invention includes: a pitching state amount detection section 194 that detects a state amount of the pitching movement of the vehicle body 10; a spring characteristics calculation section 197 that calculates spring characteristics of suspension cylinders 30, based on detection results of stroke sensors 306, pressure sensors 307, and temperature sensors 308; a pitching target amount calculation section 192 that calculates a target amount of the pitching movement of the vehicle body 10, according to the spring characteristics calculated by the spring characteristics calculation section 197; and a torque correction value calculation section 193 that calculates a torque correction value required to correct the pitching amount, according to the spring characteristics calculated by the spring characteristics calculation section 197.

Abstract: A dump truck pitching control system that can improve the ride quality of a vehicle body and the drive stability during traveling is provided. The present invention includes: a pitching state amount detection section 194 that detects a state amount of the pitching movement of the vehicle body 10; a spring characteristics calculation section 197 that calculates spring characteristics of suspension cylinders 30, based on detection results of stroke sensors 306, pressure sensors 307, and temperature sensors 308; a pitching target amount calculation section 192 that calculates a target amount of the pitching movement of the vehicle body 10, according to the spring characteristics calculated by the spring characteristics calculation section 197; and a torque correction value calculation section 193 that calculates a torque correction value required to correct the pitching amount, according to the spring characteristics calculated by the spring characteristics calculation section 197.

Abstract: Stresses are decreased at joints of a support structure disposed on a body of a dump truck. The dump truck includes a body frame (2), a body (2), a support structure (12) disposed on the body and supported by the body frame, and load transmission structures configured to transmit a load from the support structure to the body frame and, to transmit a reaction force from the body frame to the support structure. The support structure has a plurality of vertical plates (12a, 12b) and a bottom plate (12c). The vertical plates are arranged along a direction in which the reaction force is received from the body frame, and the bottom plate is maintained in upward contact with these vertical plates. The bottom plate is divided into first areas and a second area. The first areas include areas where the bottom plate is in contact with the vertical plates, and the second area is an area other than the first areas.

Abstract: Disclosed is a body structure for a dump truck (1) having a body frame (3). The body structure is provided with hinge pins (5) to be located toward a rear of the body frame, a body (2A) to be tiltably disposed on the body frame via the hinge pins and to be adapted to load payload (9), and stiffening members arranged on outer surfaces of the body. The body is constructed at least of a floor board (62a), a front board (62b), side boards (62c), and a canopy (62d). The stiffening members include side-board stiffeners (61) connecting upper portions of elongated joints between the side boards and the front board to portions of elongated joints between the side boards and the floor board. The latter portions are located rearward of positions laterally corresponding to a barycentric position (G) of the payload (9) in a longitudinal direction of the body.

Abstract: A dump truck is provided with a frame, hinge pins and a body (5). The body is provided on a lower surface of a floor board (11a) thereof with a rail (12) along a longitudinal direction of the frame. The rail is a hollow structure member comprised of two side rail plates (12a) and a bottom rail plate (12b). The two side rail plates (12a) extend downwardly from the lower surface of the floor board (11a) of the body and oppose each other with an interval therebetween in a lateral direction of the frame, and the bottom rail plate (12b) is arranged in contact with respective lower end surfaces (12a-1) of these two side rail plates (12a). The dump truck (1) satisfies a relationship of Ts<Tb<Tf, where Ts is a thickness of the side rail plates, Tb is a thickness of the bottom rail plate, and Tf is a thickness of a top frame plate (2a-2) of the frame.

Abstract: A dump truck is provided with a frame, hinge pins and a body (5). The body is provided on a lower surface of a floor board (11a) thereof with a rail (12) along a longitudinal direction of the frame. The rail is a hollow structure member comprised of two side rail plates (12a) and a bottom rail plate (12b). The two side rail plates (12a) extend downwardly from the lower surface of the floor board (11a) of the body and oppose each other with an interval therebetween in a lateral direction of the frame, and the bottom rail plate (12b) is arranged in contact with respective lower end surfaces (12a-1) of these two side rail plates (12a). The dump truck (1) satisfies a relationship of Ts<Tb<Tf, where Ts is a thickness of the side rail plates, Tb is a thickness of the bottom rail plate, and Tf is a thickness of a top frame plate (2a-2) of the frame.

Abstract: Stresses are decreased at joints of a support structure disposed on a body of a dump truck. The dump truck includes a body frame (2), a body (2), a support structure (12) disposed on the body and supported by the body frame, and load transmission structures configured to transmit a load from the support structure to the body frame and, to transmit a reaction force from the body frame to the support structure. The support structure has a plurality of vertical plates (12a, 12b) and a bottom plate (12c). The vertical plates are arranged along a direction in which the reaction force is received from the body frame, and the bottom plate is maintained in upward contact with these vertical plates. The bottom plate is divided into first areas and a second area. The first areas include areas where the bottom plate is in contact with the vertical plates, and the second area is an area other than the first areas.

Abstract: A body for a dump truck includes a body frame, a bottom wall, front wall, and left and right side walls arranged on the body frame. The body also includes an earth/sand anti-sticking device and a steel member arranged outside and opposite the earth/sand anti-sticking device such that a space is formed between the steel member and the earth/sand anti-sticking device. The body is provided with at least one steel rib arranged in the space, fixedly secured to the steel member to reinforce the steel member, and arranged extending upright toward the earth/sand anti-sticking device. The steel member is any one of the bottom wall, front wall, and left and right walls, and the steel rib is shaped to divide the space.

Abstract: A body for a dump truck includes a body frame, a bottom wall, front wall and left and right side walls arranged on the body frame. The bottom wall, front wall and left and right side walls define a payload section for loading a payload, an earth/sand anti-sticking device is arranged in a corner part of the payload section to prevent earth or sand from sticking in the corner part. A steel member is arranged outside and opposite to the earth/sand anti-sticking device such that a space is formed between the steel member and the earth/sand anti-sticking device. The body includes at least one steel rib having a ridge extending out from a surface of a plate that forms the earth/sand anti-sticking device, the ridge is fixedly secured by welding to the plate that forms the earth/sand anti-sticking device.

Abstract: Disclosed is a body structure for a dump truck (1) having a body frame (3). The body structure is provided with hinge pins (5) to be located toward a rear of the body frame, a body (2A) to be tiltably disposed on the body frame via the hinge pins and to be adapted to load payload (9), and stiffening members arranged on outer surfaces of the body. The body is constructed at least of a floor board (62a), a front board (62b), side boards (62c), and a canopy (62d). The stiffening members include side-board stiffeners (61) connecting upper portions of elongated joints between the side boards and the front board to portions of elongated joints between the side boards and the floor board. The latter portions are located rearward of positions laterally corresponding to a barycentric position (G) of the payload (9) in a longitudinal direction of the body.

Abstract: Rear wheel tires of a vehicle body are spaced apart from each other in the vehicle width direction. A foreign object removing device is provided between an outer tire and an inner tire of the rear wheels on one side of the vehicle for removing foreign objects between the tires. The foreign object removing device includes a bar-shaped member inserted in a suspended state between the tires, and a shoe provided in a lower end side of the bar-shaped member to collide with foreign objects such as earth and sand, and stones getting in between the tires for flicking out the foreign objects from between the tires. The shoe is replaceably attached to the lower end side of the bar-shaped member by using a bolt. In a case where the shoe wears down, only the shoe is replaced.

Abstract: [Problem] To realize a body having a light weight and sufficient rigidity, and therefore, to ease restriction on the authorized payload for a payload section such the authorized payload can be increased and the efficiency of hauling work by a dump truck can be improved. [Solution] A body 5 is provided with sloping plates 14-16 arranged in corner parts of a payload section defined by a bottom wall 7, a front wall 8, and left and right side walls 9; and is also provided with steel ribs 17a-17c arranged in hollow parts 25a-25c between these sloping plates 14-16 and the associated ones of the bottom wall 7, front wall 8 and left and right side walls 9 arranged outside and opposite the sloping plates 17a-17c, fixedly secured to the associated walls by welding to reinforce them, and having ridges 17a1-17c1 extending out from surfaces of the sloping plates 14-16. These ridges 17a1-17c1 are fixedly secured to the associated walls by welding.

Abstract: [Problem] To realize a body 5 having a light weight and sufficient rigidity, and therefore, to ease restriction on the authorized payload for a payload section such the authorized payload can be increased and the efficiency of hauling work by a dump truck can be improved. [Solution] A body is provided with earth/sand anti-sticking devices arranged in corner parts of a payload section defined by a bottom wall 7, a front wall 8, and left and right side walls 9, for example, sloping plates 14-16; and steel ribs 17a-17c arranged in hollow parts 25a-25c between steel members arranged outside and opposite the sloping plates 14-16, for example, the associated ones of the bottom wall 7, front wall 8 and left and right side walls 9, fixedly secured to the associated walls by welding to reinforce them, and arranged extending upright toward the sloping plates 14-16, respectively.

Abstract: To provide a dump truck capable of assuring a large authorized payload weight while inhibiting spilling of an object under haulage over parts of side walls. A dump truck is provided on a frame 3 with a tillable body 5. The body 5 has a payload section defined by a bottom wall, a front wall 8 and a pair of side walls 9 for loading therein an object to be hauled, and a canopy 10 connected to the front wall 8 of the payload section and arranged over an operator's cab 4.

Abstract: Rear wheel tires of a vehicle body are spaced apart from each other in the vehicle width direction. A foreign object removing device is provided between an outer tire and an inner tire of the rear wheels on one side of the vehicle for removing foreign objects between the tires. The foreign object removing device includes a bar-shaped member inserted in a suspended state between the tires, and a shoe provided in a lower end side of the bar-shaped member to collide with foreign objects such as earth and sand, and stones getting in between the tires for flicking out the foreign objects from between the tires. The shoe is replaceably attached to the lower end side of the bar-shaped member by using a bolt. In a case where the shoe wears down, only the shoe is replaced.

Abstract: A crusher is provided that can quickly return to the operating state from a shutdown state which occurs due to the incorporation of a foreign object. Provided are a crushing rotor 32, a housing 41 and an anvil 33 supported by the housing to face a crushing chamber 31. A lever 90 is disposed on the side opposite the crushing rotor 32 with respect to the housing 41, pivotably installed with respect to side frames 19, and provided with a holding portion for holding the housing 41 to keep a posture where the anvil 33 faces the crushing chamber 31. An elastic member 93 is for biasing the lever 90 at a set biasing force. When the biasing force is exceeded, the lever 90 turns to permit the anvil 33 to turn and retreat from the crushing chamber 31.

Abstract: A crusher is provided that can quickly return to the operating state from a shutdown state which occurs due to the incorporation of a foreign object. Provided are a crushing rotor 32, a housing 41 and an anvil 33 supported by the housing to face a crushing chamber 31. A lever 90 is disposed on the side opposite the crushing rotor 32 with respect to the housing 41, pivotably installed with respect to side frames 19, and provided with a holding portion for holding the housing 41 to keep a posture where the anvil 33 faces the crushing chamber 31. An elastic member 93 is for biasing the lever 90 at a set biasing force. When the biasing force is exceeded, the lever 90 turns to permit the anvil 33 to turn and retreat from the crushing chamber 31.