RU2491389C2 - Mine excavator working tools - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: working tool of mine rope excavator comprises shovel boom, handle fitted thereat in saddle bearing, bucket consisting of sidewalls, toothed front wall, wear wall and bottom with bar equipped with braking mechanism and bucket bottom opening mechanism including pulley fitted at saddle bearing, pull-off pulley, air cylinder and rope connected with bucket opening lever. Bucket bottom opening mechanism comprises additionally two guide pulleys one being fitted at saddle bearing while another one is arranged at the handle. Air cylinder is arranged at saddle bearing and connected with pull-off pulley. The distance between guide pulleys at saddle bearing exceeds the pull-off pulley diameter. The rope connected with bucket bottom opening lever is reeved between pull-off and guide pulleys of saddle bearing.

EFFECT: longer life reduced dynamic loads.

2 dwg

Description

The invention relates to the working equipment of mining and loading machines, designed for the development and loading into vehicles or dump of minerals, overburden rocks in open pit mining and to perform large volumes of earthwork on rocks of high strength.

A known mechanism for opening the bottom of the bucket (Patent US 6467202, E02F 3/407, publ. 2002.10.22). The bottom of the bucket is pivotally attached to the bucket and rotates in a controlled manner between open and closed positions. In one embodiment, the rotation of the bottom is controlled by a stop pivotally connected to the bottom and the bucket. In another embodiment, the bottom is pivotally attached to the bucket with a hairpin and its rotation is controlled by a linkage through a linear displacement adjuster. The bottom hinge is located above the bottom edge of the bucket to reduce the unloading height.

Known bucket, including a pivotally mounted bottom and a mechanism for opening the bottom of the bucket (Patent CA 2548874, E02F 3/40, Publ. 2006.12.03). The mechanism for opening the bottom of the bucket contains a lever that can be installed using the hydraulic cylinder in two positions - lock and unlock, which fix the bottom connected to it with respect to the bucket. In the locked lever position, the bucket bottom opening mechanism holds the bottom in the closed position. And with the unlocked position of the mechanism for closing the bottom of the bucket, the bottom hangs freely on hinges. With the simplicity and reliability of this mechanism, for a cable excavator, it is problematic to bring the hydraulic cylinder hoses to the bucket.

As a prototype, the working equipment of a career excavator was selected (Patent RU 90462, E02F 3/28, E02F 3/40, publ. 10.01.2010), which contains an arrow, a handle mounted on an arrow in the saddle bearing, a bucket, a drive and a pressure mechanism. The bucket consists of side walls, a front wall with teeth, a rear wall, a bottom with a deadbolt. The bucket is equipped with a braking mechanism and a bottom opening mechanism, including a pulling unit connected to the bucket bottom opening lever. The mechanism for opening the bottom of the bucket also contains a pneumatic cylinder connected to the extraction unit. An additional block is mounted on the saddle bearing so that a pair of blocks are formed, stored by the rope through the pull-out block. The axis of the blocks mounted on the saddle bearing coincides with the axis of rotation of the saddle bearing. The lack of working equipment is the rapid wear of the blocks and the rope of the lever for opening the bottom of the bucket, because with any movement of the handle, the rope friction on the blocks.

An object of the invention is to increase the service life of working equipment by reducing dynamic loads when opening the bottom of the bucket.

The problem is solved in that the working equipment comprises an arrow, a handle mounted on the arrow in the saddle bearing, a bucket consisting of side walls, a front wall with teeth, a rear wall and a bottom with a bolt, equipped with a braking mechanism and a mechanism for opening the bottom of the bucket. The bucket bottom opening mechanism includes a guide block mounted on the saddle bearing, a pull block, a pneumatic cylinder and a rope connected to the bucket bottom opening lever. Additionally, the bucket bottom opening mechanism contains two guide blocks, one of which is mounted on the saddle bearing, and the other on the handle, the pneumatic cylinder is placed on the saddle bearing and connected to the extraction unit. The distance between the guide blocks on the saddle bearing is larger than the diameter of the pull block, and the rope connected to the lever for opening the bottom of the bucket is stocked between the pull and guide blocks of the saddle bearing

The pneumatic cylinder assembly — a pull-out unit, two guide blocks on the saddle bearing, and a guide block on the handle with the bucket bottom closed — keep the rope tension constant without kinks, and therefore without stress concentrations. When opening the bottom of the bucket, dynamic overloads also do not occur, because the placement of the rope connected to the lever for opening the bottom of the bucket between the two guide blocks on one side and the pull block connected to the hydraulic cylinder on the other allows you to smoothly rotate the lever for opening the bottom of the bucket.

The distance between the guide blocks on the saddle bearing is larger than the diameter of the exhaust unit is determined by the direction of movement of the exhaust unit when opening the bottom of the bucket.

The installation of a pneumatic cylinder with a deflecting unit on the saddle bearing avoids the placement of high pressure hoses on the handle.

In Fig.1 presents the working equipment of a career wire rope excavator;

Figure 2 presents a saddle bearing with a node of the mechanism for opening the bottom of the bucket.

The working equipment (figure 1) contains an arrow 1, a handle 2, a bucket 3. A handle 2 is mounted on the arrow 1 in a saddle bearing 4. The bucket 3 consists of side walls, a front wall with teeth, a rear wall, a bottom with a deadbolt, and a lever 5, the rotation of which pulls out the bolt and opens the bottom of the bucket 3. The mechanism for opening the bottom of the bucket 3 includes two guide blocks 6 and 7, as well as a pull block 8 connected to the pneumatic cylinder 9. The rope 10 connected to the lever 5 for opening the bottom of the bucket 3 is stocked through the guide blocks 6, 7, a pull-out unit 8 and an additional guide a block 11 located on the handle 2. Moreover, the axis of the pulling block 8 forms a triangle with the axes of the guide blocks 6 and 7 located on the saddle bearing 4, and the rope 10 passes between the guide blocks 6 and 7 on one side and the pulling block 9 on the other.

The working equipment of a mining excavator operates as follows: the filled bucket 3 is installed for unloading in a dump or a vehicle. The bottom opening mechanism is designed to pull the bolt out of the hole in the fifth of the front wall of the bucket at the time of unloading. In the closed bottom position, the rope 10 on the handle 2 has the form of a straight line, at the end of the handle 2 is stored through the guide block 11 and connected to the lever 5.

When opening the bottom of the bucket 3, the pneumatic cylinder 9 moves the exhaust unit 8 upward, pulling the rope 10 twice the stroke of the piston, and rotates the bolt lever 5, the bucket 3 is open. Closing the bottom occurs spontaneously when the bucket is lowered from the unloading position to the start of digging position.

The use of excavator working equipment, in which the bucket bottom is opened by not directly pulling the bolt from the bucket bottom using the system: lever - rope - electric motor, but through the unit: the pulling block - the pneumatic cylinder and guide blocks allows to exclude dynamic rope overloads when opening the bucket, to increase the term its service, therefore, the service life of the working equipment.

Claims (1)

A working equipment for a mining cable excavator, comprising an arrow, a handle mounted on an arrow in a saddle bearing, a bucket consisting of side walls, a front wall with teeth, a rear wall and a bottom with a bolt, equipped with a braking mechanism and a mechanism for opening the bottom of the bucket, including a guide block, mounted on a saddle bearing, a pull-out unit, a pneumatic cylinder and a rope connected to the bucket bottom opening lever, characterized in that the bucket bottom opening mechanism contains two additional guides units, one of which is mounted on the saddle bearing, and the other on the handle, the pneumatic cylinder is placed on the saddle bearing and connected to the extraction unit, the distance between the guide blocks on the saddle bearing is greater than the diameter of the extraction unit, and the rope connected to the lever for opening the bottom of the bucket is stocked between by tightening and guiding blocks of the saddle bearing.

Images