SU1384424A1 - Vehicle transmission - Google Patents

Abstract

The invention relates to power transmission of hoisting-and-transport machines, 3 particular jib self-propelled cranes having two engines. The purpose of the invention is to increase durability and enhance functionality. The power transmission of a transport vehicle contains two engines 1, kinematically connected with the input shafts 7 of the central wheels 9 and 10 of the three-link planetary gear. The cogwheel of the carrier 11 of the latter is engaged with the gear 17 of the drive shaft 15, which is kinematically connected with the gear 3 of the pump drive 4 working bodies and through the gear box 5 with driving axles 6. The shafts 7 are equipped with brakes 8. In transport mode, both engines 1 transmit rotation through the summing mechanism 2, which includes a three-stage planetary mechanism, the drive 15 and the intermediate 12 shafts on the drive axles 6, ensuring the movement of the machine at a higher speed. During the operation of the working equipment, the motors 1 are alternately connected via the summing mechanism 2 to the drive of the pumps of the working equipment, which ensures even wear of the engines during operation of the crane. 2 Il. i (L 00 00 ii (i) b 4i ND 4

Description

FIELD OF THE INVENTION The invention relates to lifting and transport engineering and concerns power transmissions of overhead conveyor machines, mainly self-propelled steering cranes.

The purpose of the Invention is increased durability and enhanced functionality.

Figure 1 shows a jib self-propelled crane, general view; 2 is a kinematic power train of a jib self-propelled crane.

The jib self-propelled crane (Fig. 1) contains two engines 1 located on the chassis frame, a summing mechanism 2, a gear 3 for driving the pumps of 4 working members, a box of 5 speeds and driving axles 6.

The summing mechanism comprises a three-link planetary mechanism mounted in its housing, consisting of central wheels 9 and 10 mounted on shafts 7c with brakes 8 and driven 11, an intermediate shaft 12c gears 13 and 14 and a drive shaft 15 on which coupling 16 and gears 17 and 18. Both engines 1 are kinematically associated with the input shafts 7 of the central wheels 9 and 10 of the three-link planetary mechanism. Gears 1,3 and 14 are rigidly mounted on the intermediate shaft 12 and meshed with gears 17 and 18, which are loosely mounted on the drive shaft 15 With the help of an i 6 clutch mounted on the splines that can be moved along the drive shaft 15, it is alternately connected with this shaft gears 17 and 18,

The summing mechanism 2 is kinematically connected with the speed box 5, which is kinematically connected with the driving axles 6 and the gear drive 3 of the pump drive 4 of the working bodies.

Power transmission works as follows.

In transport mode, the brakes 8 are turned off (open), two engines 1 are turned on, which, rotating the central wheels 9 and 10, through the gear wheel 1 1 pass the rotation to the gear 17 of the drive shaft 15, which, with the clutch in the left position 16 transmits rotation to a box of 5 speeds and then to drive axles 6. Pumps 4 toothed gear

0 5 0

s

0

five

Gear units 3 are not rotated in this case, since clutch 19 is turned off.

When the work equipment is operating, one of the engines 1, for example, the left one, is turned on, then a brake 8 is applied to the input shaft 7 of the central wheel 9 of the three-stage planetary mechanism on the side of the right engine 1 and thus the central wheel 9 stops.

The rotation from the central wheel 10 is transmitted to the gear of the carrier 11 and when the coupling 16 is connected with the gear 17 to the drive shaft 15, to the gear transmission 3 to the pumps 4 of the operating elements, with the coupling 19 of the pumps turned on.

When the right engine 1 is engaged and the brake 8 is applied from the left engine 1, the rotation, with the central wheel 10 stopped, through the gear wheel drove 11, gears 17, 13, 14 and 18 when the coupling 16 is connected to gear 18, it is transmitted to the drive shaft 15, and then similar to the first case.

Thus, by placing both motors 1 on the chassis and connecting them with a summing mechanism 2, made with brakes 8 on the input shafts 7 and with gears 13 and 14, necessary for equalizing the speeds on the drive shaft 15 due to the change in the number of revolutions of the gear shaft. the carrier wheels due to the alternate stop of the central wheels 9 and 10, it becomes possible to alternately operate the engines 1 to drive the gear 3 pumps of the working bodies, thereby greatly increasing the durability of the lifting and transport machine, self-propelled crane. In addition, the proposed power transmission ensures that both engines are connected to the leading axles of the crane in transport mode at any position of the turntable.

Claims (1)

Invention Formula A power transmission of a vehicle, preferably a boom self-propelled crane, comprising a transmission including drive axles and a gear box kinematically associated with them, a gear drive of a pump driving gear. A motor, one of which is located on the chassis frame and is kinematically connected with driving axles, and a summing mechanism kinematically connected with both engines to connect the second of these engines to the driving axles in transport mode, and the summing mechanism includes a three-tier planetary mechanism, with the input shafts of the central wheels of which both engines are kinematically connected, so that, in order to increase durability and expand functionality, the second engine The driver is located on the chassis frame, and the summing mechanism additionally includes an intermediate and drive shafts installed in its case, the last of which is kinematically connected with the gearbox and the gear drive of the pump drive, and two pairs of gears meshed with each other which are rigidly mounted on the intermediate shaft, and the other two are loosely mounted on the drive shaft and coupled to it by a clutch, one of the gears of the drive shaft - permanently engaged with the gear wheel of the three-link carrier mechanism, and on the input shafts of the central wheels of the three-stage planetary mechanism, brakes are installed /