Abstract: An air spring for a cab of a heavy truck with automatic height adjustment, in which the air spring is provided between the cab and a frame of a truck and supports the cab with a pressure of air filling in the air spring, includes a canister in which an internal space is formed, and a piston movably mounted in the internal space of the canister and configured to ascend and descend relative to the canister. A port opening unit is provided adjacent to an intake port and an exhaust port of the piston, respectively. When the cab ascends or descends, each of the port opening units comes into contact with guides, each having an inclined surface, formed in the canister to open either the intake port or the exhaust port.

Abstract: A side sill structure for a vehicle includes: a side sill connected to a floor of the vehicle, and extending in a longitudinal direction of the vehicle; and a rear wheel house connected to a rear end of the side sill. The side sill includes an outer side sill facing an exterior of the vehicle, an inner side sill facing an interior of the vehicle, and a reinforcement disposed between the outer side sill and the inner side sill. The reinforcement extends from a front of the vehicle to the rear wheel house, and a cross-section of the reinforcement is unchanged along a longitudinal direction of the reinforcement.

Abstract: Compositions are disclosed that comprise a piezoelectric material according to Chemical Formula 1: (1?y)(NaaK1-a)(Nb1-x,Sbx)-ySrZrO3+n mol % CuO, wherein 0.01?y?0.10, 0.4?a?0.6, 0?x?0.06, and 0.5?n?1.5. The compositions can further comprise a first material, and a second material surrounded by the first material. A piezoelectric device is also described, which includes a piezoelectric device layer including a composition of Chemical Formula 1, and having a first material layer and a second material layer surrounded by the first material layer; a first electrode part disposed on a first surface of the piezoelectric device layer; and a second electrode part disposed on a second surface facing the first surface.

Abstract: A side sill structure for a vehicle includes: a side sill connected to a floor of the vehicle, and extending in a longitudinal direction of the vehicle; and a rear wheel house connected to a rear end of the side sill. The side sill includes an outer side sill facing an exterior of the vehicle, an inner side sill facing an interior of the vehicle, and a reinforcement disposed between the outer side sill and the inner side sill. The reinforcement extends from a front of the vehicle to the rear wheel house, and a cross-section of the reinforcement is unchanged along a longitudinal direction of the reinforcement.

Abstract: A front cab tilting stay apparatus of a truck may include a stay rod connecting a vehicle body and a front cab, a stay lever and a hook ring provided in the stay rod, and a locking mechanism provided in the stay lever, wherein the locking mechanism includes a rotation lever rotatably coupled to the stay lever via a lever shaft, wherein a tilting state of the front cab is configured to be maintained by an engagement between the locking mechanism and the hook ring in the tilting state of the front cab in which the stay rod is extended straight as the front cab is rotated in a predetermined direction.

Abstract: A front cab tilting stay apparatus of a truck may include a stay rod connecting a vehicle body and a front cab, a stay lever and a hook ring provided in the stay rod, and a locking mechanism provided in the stay lever, wherein the locking mechanism includes a rotation lever rotatably coupled to the stay lever via a lever shaft, wherein a tilting state of the front cab is configured to be maintained by an engagement between the locking mechanism and the hook ring in the tilting state of the front cab in which the stay rod is extended straight as the front cab is rotated in a predetermined direction.

Abstract: A connector for a pneumatic circuit is provided. The connector includes a connector body in which an end portion of a tube is inserted and a sealing member disposed inside the connector body and maintaining sealing between the end portion of the tube and the connector body. An air vent aperture is formed through the connector body from an inner surface of the connector body to an outer surface of the connector body. When air that leaks from a gap between the connector body and the end portion of the tube inserted into the connector body flows into the air vent aperture and passes through the aperture, an edge tone alarm sound is generated.

Abstract: A cab mounting apparatus for a vehicle includes a front mount connecting between a front side of a cab and a chassis. A rear mount connects between a rear side of the cab and the chassis. The front mount includes a stabilizer link disposed on a front side of the vehicle, a pair of front brackets individually fixed to the front side of the cab, and a pair of connecting arms individually connecting between respective ends of the stabilizer link and the respective front brackets. Each connecting arm is pivotally connected to each front bracket by a hinge member and a bush. The bush has a pair of stopper members disposed on both ends thereof. The bush and the pair of stopper members are integrated into a single unitary body.

Abstract: A connector for a pneumatic circuit is provided. The connector includes a connector body in which an end portion of a tube is inserted and a sealing member disposed inside the connector body and maintaining sealing between the end portion of the tube and the connector body. An air vent aperture is formed through the connector body from an inner surface of the connector body to an outer surface of the connector body. When air that leaks from a gap between the connector body and the end portion of the tube inserted into the connector body flows into the air vent aperture and passes through the aperture, an edge tone alarm sound is generated.

Abstract: A cab mounting apparatus for a vehicle includes a front mount connecting between a front side of a cab and a chassis. A rear mount connects between a rear side of the cab and the chassis. The front mount includes a stabilizer link disposed on a front side of the vehicle, a pair of front brackets individually fixed to the front side of the cab, and a pair of connecting arms individually connecting between respective ends of the stabilizer link and the respective front brackets. Each connecting arm is pivotally connected to each front bracket by a hinge member and a bush. The bush has a pair of stopper members disposed on both ends thereof. The bush and the pair of stopper members are integrated into a single unitary body.

Abstract: The present invention provides an earth apparatus of a vehicle, which includes a panel having a through-hole, a fastener having a panel-shaped support portion with an open side at one side and a nut portion fitted in the through-hole of the panel, and an earth member combined by the fastener, connected with an earth wire at one side, and having a guide bending downward at a predetermined length at the other side such that the guide is combined at a position corresponding to the open side of the support portion of the fastener.

Abstract: A cab tilting device includes: a left torsion bar connected with the left bottom of a cab of a vehicle to generate twisting restoring force to tilt the cab toward the front of the vehicle from the left bottom of the cab in a width direction of the cab; and a right torsion bar connected with the right bottom of the cab to generate the twisting restoring force to tilt the cab toward the front of the vehicle from the right bottom of the cab in the width direction of the cab to generate the same twisting tilting force from the left side to the right side of the cab.

Abstract: The present invention provides an earth apparatus of a vehicle, which includes a panel having a through-hole, a fastener having a panel-shaped support portion with an open side at one side and a nut portion fitted in the through-hole of the panel, and an earth member combined by the fastener, connected with an earth wire at one side, and having a guide bending downward at a predetermined length at the other side such that the guide is combined at a position corresponding to the open side of the support portion of the fastener.

Abstract: A cab rear mounting device includes: a pair of posts disposed at a predetermined interval in a width direction of a vehicle, and fixedly mounted to a vehicle body; strikers mounted to the pair of posts, respectively; a pair of locking devices mounted to the cab, and coupled to each striker to be locked, so as to fix the cab to the vehicle body, or separated from each striker to be unlocked, so as to release the cab from the vehicle body; and damper devices mounted to the posts, respectively, and configured to absorb vibration or shock, thereby promoting a decrease in the number of components, and weight and cost of the vehicle.

Abstract: A cab tilting device includes: a left torsion bar connected with the left bottom of a cab of a vehicle to generate twisting restoring force to tilt the cab toward the front of the vehicle from the left bottom of the cab in a width direction of the cab; and a right torsion bar connected with the right bottom of the cab to generate the twisting restoring force to tilt the cab toward the front of the vehicle from the right bottom of the cab in the width direction of the cab to generate the same twisting tilting force from the left side to the right side of the cab.

Abstract: A cab rear mounting device includes: a pair of posts disposed at a predetermined interval in a width direction of a vehicle, and fixedly mounted to a vehicle body; strikers mounted to the pair of posts, respectively; a pair of locking devices mounted to the cab, and coupled to each striker to be locked, so as to fix the cab to the vehicle body, or separated from each striker to be unlocked, so as to release the cab from the vehicle body; and damper devices mounted to the posts, respectively, and configured to absorb vibration or shock, thereby promoting a decrease in the number of components, and weight and cost of the vehicle.