Abstract: A frame structure for a vehicle includes: an inner panel connected to a side member and defining an inner side of a rear part of the side member; an outer panel connected to a rear side of the side member and coupled to an outer side of the inner panel defining a closed cross-section together with the inner panel and defining an outer side of the rear part of the side member; an opening portion formed below the inner and outer panels partially opening the closed cross-section so that a front end of a rear suspension arm can be inserted into the opening portion; and a reinforcing member disposed in the opening portion defining the closed cross-section together with the outer panel and the inner panel and configured to close an internal space in the outer and inner panels.

Abstract: A frame structure for a purpose built vehicle (PBV) includes: two main side members extending while gradually rising toward a front of the PBV and extending in a front/rear direction to be disposed on either side of the PBV; two auxiliary side members respectively extending in a front/rear direction to be disposed on a lower side of the two main side members; a front cross member connecting the two auxiliary side members in a lateral direction of the PBV; and a plurality of vertical members respectively connecting the main side members and the auxiliary side members in a vertical direction.

Abstract: A frame for a purpose-built vehicle (PBV) includes: a front part frame positioned at a front side of a vehicle; a rear part frame positioned at a rear side of the vehicle; and a center part frame. The center part frame has a rectangular planar shape and is coupled between the front part frame and the rear part frame.

Abstract: A vehicle frame structure includes: an inner panel connected to a side member and defining the inside of the side member; an outer panel connected to the side member and coupled to the inner panel forming a closed section with the inner panel and defining the outside of the side member; an opening formed in lower sides of the inner panel and outer panel to partially open the closed section such that a front end of a rear suspension arm can be inserted therein; a first reinforcement member provided in the opening forming a first closed portion with the inner panel; and a second reinforcement member provided in the opening forming a second closed portion with the inner panel, the outer panel, and the first reinforcement member and to isolate a space formed by the inner panel and the outer panel from an outer portion.

Abstract: Disclosed herein is a coupled torsion beam axle type rear suspension system that includes a coupled torsion beam axle (100) installed to extend in a transverse direction of a vehicle body, a pair of trailing arms (200) coupled to respective ends of the coupled torsion beam axle (100), and a transverse leaf spring (300) having both ends connected to the respective trailing arms (200) and a center portion connected to a body cross member (40), thereby reducing the number of parts and improving driving stability.

Abstract: Disclosed herein is a coupled torsion beam axle type rear suspension system that includes a coupled torsion beam axle (100) installed to extend in a transverse direction of a vehicle body, a pair of trailing arms (200) coupled to respective ends of the coupled torsion beam axle (100), and a transverse leaf spring (300) having both ends connected to the respective trailing arms (200) and a center portion connected to a body cross member (40), thereby reducing the number of parts and improving driving stability.

Abstract: A frame for a purpose-built vehicle (PBV) includes: a front part frame positioned at a front side of a vehicle; a rear part frame positioned at a rear side of the vehicle; and a center part frame. The center part frame has a rectangular planar shape and is coupled between the front part frame and the rear part frame.

Abstract: A frame structure for a purpose built vehicle (PBV) includes: two main side members extending while gradually rising toward a front of the PBV and extending in a front/rear direction to be disposed on either side of the PBV; two auxiliary side members respectively extending in a front/rear direction to be disposed on a lower side of the two main side members; a front cross member connecting the two auxiliary side members in a lateral direction of the PBV; and a plurality of vertical members respectively connecting the main side members and the auxiliary side members in a vertical direction.

Abstract: A frame for an electric vehicle includes a front part frame located at a front of the vehicle; a rear part frame located at a rear of the vehicle; and a central part frame configured in a flat shape to be coupled between the front part frame and the rear part frame and to accommodate a battery therein.

Abstract: A vehicle battery pack case includes a battery bolt provided on a lateral side of a vehicle frame; a first nut provided outside the battery bolt, externally and internally formed with an internal screw thread and an external screw thread, of which tightening directions are opposite to each other, and tightened to the battery bolt through the internal screw thread; and a second nut provided outside the battery bolt and the first nut, and tightened to the first nut through the external screw thread formed on the first nut.

Abstract: A frame structure for a purpose built vehicle (PBV) includes: an inner panel connected to the rear of a middle part of a side member to form an inner side of a rear part of the side member, a front outer panel connected to the rear of the middle part of the side member and coupled to an outer side of the inner panel to form a closed cross-section, a center outer panel connected to the rear of the front outer panel and coupled to the outer side of the inner panel to form a space in which a rear suspension member is coupled, and a rear outer panel connected to the rear of the center outer panel and coupled to the outer side of the inner panel to form a closed cross-section.

Abstract: Provided is a stepless variable auto stroke hydraulic breaker system capable of reducing impact energy reflected in the event of an idle blow by detecting a frequency of vibrations generated when a chisel breaks objects such as bedrocks using a vibration sensor, operating according to a short stroke if the frequency of vibrations does not exceed a preset frequency, and automatically switching the short stroke into a long stroke if the frequency of vibrations exceeds the preset frequency. The breaker system includes a vibration sensor configured to detect vibrations generated when a chisel breaks rocks, a transmitter provided with the vibration sensor and configured to transmit signals generated from the vibration sensor, a receiver configured to receive the signals transmitted from the transmitter, and a stepless variable auto stroke hydraulic breaker controlled by a reception micro controller unit (MCU) of the receiver.

Abstract: Provided is a stepless variable auto stroke hydraulic breaker system capable of reducing impact energy reflected in the event of an idle blow by detecting a frequency of vibrations generated when a chisel breaks objects such as bedrocks using a vibration sensor, operating according to a short stroke if the frequency of vibrations does not exceed a preset frequency, and automatically switching the short stroke into a long stroke if the frequency of vibrations exceeds the preset frequency. The breaker system includes a vibration sensor configured to detect vibrations generated when a chisel breaks rocks, a transmitter provided with the vibration sensor and configured to transmit signals generated from the vibration sensor, a receiver configured to receive the signals transmitted from the transmitter, and a stepless variable auto stroke hydraulic breaker controlled by a reception micro controller unit (MCU) of the receiver.

Abstract: A coupling device for automatically coupling an excavating device or a hammer device to an excavator includes an arm coupler fixed to one end of an arm of the excavator and a link coupler fixed to an operation link of the arm of the excavator. The excavating device includes a pair of brackets having a pair of the assembling holes. Piston rods, contained in the arm coupler and the link coupler and inserted into the assembling holes, connect the brackets of the excavating device to the excavator.

Abstract: A shear assembly including a bracket unit detachably to an excavator is provided. The shear assembly includes a main body rotatably attached to a bracket unit, a rotating unit disposed between the main body and the bracket unit to rotate main body around the bracket unit, a fixed arm unit fixed to the main body, a moving arm unit rotatably mounted on the main unit and opened from and closed toward the fixed arm unit, a cylinder unit rotatably mounted on the main body and rotating the moving arm unit.

Abstract: A hydraulic breaker for absorbing and reducing vibration and noise generated from the breaker and for reducing debris and dust scattered from the impact tool during using the breaker is provided. Space between main body of the breaker and outer housing is filled with fluid supplied from outside of the outer housing. Fluid hose is connected to a fluid hole formed on the outer housing to supply fluid into the space. Upper absorber is disposed between a bracket and upper portion of the main body, lower absorber is disposed between front cover of the outer housing and front head portion of the main body. Side absorbers are disposed between sidewall of the outer housing and outer cylindrical sidewall of the main body to keep a distance between outer housing and main body and to provide the space filled with fluid. Fluid, such as water, filled in the space is ejected through holes formed on the front cover of the outer housing.