The mechanism of swing excavator

 

(57) Abstract:

The invention relates to earth moving equipment, namely drives the swing compact excavators. The mechanism of swing excavator contains a rotation device, the inner race of the bearings which are associated with the platform, the outer cage - frame chassis and a hydraulic motor with an output shaft. One end of the output shaft connected directly to the rotor of the hydraulic motor, and a second end fixedly mounted on the frame of the chassis by means of a toothed coupling. The casing of the hydraulic motor is connected with the platform by means of a lever rigidly connected to the housing, and a leash, pivotally connected with the lever and the platform. An output shaft provided with a channel for supplying a working fluid to the hydraulic mechanisms of the suspension. Simplified design, improved reliability of the device. 1 C. p. F.-ly, 2 Il.

The invention relates to earth moving equipment, namely drives the swing compact excavators, and is aimed at simplifying the design of the actuator, increasing its efficiency, reliability and durability.

The mechanism of swing excavator, output shaft (see SU 1668580, IPC E 02 F 9/12, 1989).

The disadvantages of the known device is the design complexity and low efficiency of the drive, due to power losses in numerous kinematic pairs.

Also known mechanism of swing excavator containing the rotation device, the inner race of the bearings which are associated with the platform, the outer cage - frame chassis, the hydraulic motor and the output shaft (see Berkman, I. L., Renew A. C., RAM A. K. Universal shovel construction excavators. -M.: Higher school", 1981, S. 171, Fig.173).

This unit is adopted for the prototype.

The disadvantages of the prototype are the complexity and low reliability of the drive, as well as its low efficiency.

The essence of the invention is that the mechanism of swing excavator containing the rotation device, the inner race of the bearings which are associated with the platform, the outer cage - frame chassis and a hydraulic motor with an output shaft, one end of the output shaft connected directly to the rotor of the hydraulic motor, and a second end fixedly mounted on the frame of the chassis by means of a toothed clutch, if this is the appropriate fields, and leash, pivotally connected with the lever and with the platform. In addition, the drive shaft is provided with a channel for supplying a working fluid to the hydraulic mechanisms of the suspension.

Declare a set of essential features allows to obtain the following technical result.

The connection of one end of the output shaft directly with the rotor of the hydraulic motor and the fixed fastening the second end of the shaft on the frame of the chassis when the pair of housings hydraulic platform allows you to transfer torque from the hydraulic motor directly to the rotary platform without using a gearbox and a kinematic pair of gear - bagauda gear, which significantly increases the efficiency of the rotation mechanism. When this is achieved the simplicity and compactness of the actuator, its durability and reliability.

The coupling of the second end of the output shaft to the frame of the chassis by means of a toothed coupling provides a guaranteed clearance to compensate for the distortions of the output shaft when the bearing wear turntable.

Pair housing of the hydraulic motor with the platform via a lever rigidly connected to the housing gidada, arising during the operation of the hydraulic motor, and compensates for the plane-parallel motion of the body of the latter.

The supply of the drive shaft with a channel for supplying a working fluid to the hydraulic mechanisms of the chassis eliminates the use of the reservoir for transferring fluid from a rotating platform excavator to its chassis, which also simplifies the design and increases its reliability and durability.

In Fig.1 shows the mechanism of the swing excavator, top view; Fig.2 - section a-a in Fig.1.

The mechanism of rotation of the platform 1 excavator contains rotation device 2, the inner ring 3 bearing 4 which is associated with the platform 1 and the outer ring 5 with the frame 6 of the chassis of the excavator.

As the power element drive rotation of the platform 1 is applied, high-torque rotary-planetary hydraulic motor 7, the rotor 8 is coupled directly to the output shaft 9. The second end of the shaft 9 is still connected with the frame 6 of the chassis with help of gear clutch 10, which allows to compensate for wear of the bearing assemblies. The shaft 9 provided with a channel 11 for supplying a working fluid with a rotating platform 1 to gidravlicheskiy 1 by means of the lever 13, rigidly connected to the housing 12 and the lead 14, pivotally connected with the lever 13 and the platform 1.

The mechanism of rotation of the platform 1 is as follows.

When the flow of the operating fluid in the hydraulic motor 7, the housing 12 begins to rotate together with the platform 1 around the fixed shaft 9, paired with the rotor 8. Due to the kinematic connection of the housing 12 with the platform 1 through the lever 13 and the lead 14 is provided by the perception of the reactive torque of the hydraulic motor 7 and is compensated by its plane-parallel motion.

The proposed mechanism of rotation of the platform has simplicity and compactness with high efficiency, making it highly effective when used in small-sized excavators.

1. The mechanism of swing excavator containing the rotation device, the inner race of the bearings which are associated with the platform, the outer cage - frame chassis and a hydraulic motor with an output shaft, wherein one end of the output shaft connected directly to the rotor of the hydraulic motor, and a second end fixedly mounted on the frame of the chassis by means of a toothed clutch, the housing of the hydraulic motor associated with the platform with the/P> 2. The mechanism under item 1, characterized in that the output shaft is provided with a channel for supplying a working fluid to the hydraulic mechanisms of the suspension.

 

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