The chassis frame of a self-propelled crane
(57) Abstract:Usage: the invention relates to the field of construction machines, in particular to a lifting device for self-propelled go. The inventive chassis frame, which is superimposed on the chassis, has a base node for installation of a turntable (SDAS) in the form of a truncated cone with a height equal to the height of the longitudinal beams and the angle between the generatrix of the cone and its longitudinal axis is 0<. Achieved results: the increase of rigidity of the base node on the perimeter of the SDA with the minimum weight of the frame, allowing to increase the durability of the SDA. 3 Il. The invention relates to the field of construction machines and can be used in self-propelled lifting cranes, in particular in the automotive cranes.Known chassis frame of the automobile cranes, having a cross-joisting and consisting of two longitudinal and short transverse beams. Two cross-beams are located in the middle of the frame and form together with the strut-braced beams on the outside of the longitudinal beams, the base node for a turntable (SDA) 
However, this construction of the base node in the navigation frame not sosdai base unit, their insecurity in work and low durability.Known chassis frame with a base node closest to the technical essence is the frame in which the base unit is made of two curved and straight beams between longitudinal beams and three strut-braced beams in the form of a polyhedron outside from each of the last 
However, these frames has all the disadvantages of the previous.The present invention is to increase the rigidity of the base node on the perimeter of the SDA with the minimum weight of the frame, enhancing the durability and reliability of the SDA.The problem is solved in such a way that in the well-known chassis containing the longitudinal and transverse beams installed on the base unit, the base unit is designed in the form of a truncated cone with a height equal to the height of the longitudinal beams and the angle between the generatrix and its longitudinal axis is
0<< / BR>This construction of the base node has a high and uniform along the perimeter of the SDA rigidity. This is because the vertical deformation of the surface of the host, which supports SDA-related stress tension-compression in the wall of the shell, have little value. In BA is alkah from bending beams.In Fig. 1 shows a General view of the chassis frame of a truck crane with a base node in the form of a truncated cone, Fig. 2 is a front view, Fig. 3 - section a-a in Fig. 2.The frame consists of two longitudinal beams 1, the transverse beams 2 for outriggers and the base node 3 for a turntable.The upper base 4 is connected with the upper shelves to the longitudinal beams of the seams 5. In the middle part of the Foundation for technological reasons made the window. On top of the base is attached to the ring 6 for connecting the frame with the node PP.The bottom base node connected to the bottom shelf frame 7 has a similar design. Because it is not connected directly with the service provider lacks the ring 6.The angle of inclination of the generatrix of the cone to its longitudinal axis, you need to take closer to 45o. In this case, as shown by experimental studies, is the greatest rigidity of the node. The chassis frame of a self-propelled crane, containing the longitudinal and transverse beams installed on the base unit for turntable, characterized in that the base unit is designed in the form of a truncated cone with a height equal to the height prodolny axis corresponds to 0 < < 45.p
FIELD: automotive industry.
SUBSTANCE: frame of car contains front and rear parts and two connecting sidemembers. Front part of frame is made with two sidemembers. Rear part of frame is made with two sidemembers connected by front and rear crossmembers. Each sidemember is secured from below to two front crossmembers of rear part of frame and is brought under corresponding sidemember of front part. Cab floor sill reinforcement parts are installed on one of front crossmembers of rear part of frame. Frame is made with possibility of arrangement of sidemembers of frame rear part in horizontal plane between rear wheels of car. All sidemembers are arranged symmetrically and parallel relative to longitudinal axis of car, and distance between sidemembers arranged in front part of frame is less than distance between sidemembers arranged in rear part of frame. Proposed frame is recommended for use in car.
EFFECT: increased strength in cross plane and longitudinal plane.
8 cl, 7 dwg
FIELD: transport engineering.
SUBSTANCE: invention relates to chassis of vehicle, its fastening unit and fixing part. Longitudinal beam 1 and cross beams 2 of vehicle are arranged at different level relative to each other so that cross beams can pass in form of one constant section part from first side of vehicle to its second side. Plate fixing parts 5 are installed in places of intersection of longitudinal beams and cross beams, fixing parts being separately secured on both relatively intersecting beams of chassis and transmitting forces from beam to beam.
EFFECT: improved arrangement of chassis, provision of convenient fastening of beams of frame arranged at different levels.
10 cl, 17 dwg