RU1788997C - Excavator dipper stick with rope crowding mechanism - Google Patents

Abstract

FIELD OF THE INVENTION This invention relates to techniques related to excavation and soil transport, and in particular to single-bucket mining rope excavators. The purpose of the invention is to increase the durability of the pressure line and reduce the wear of the handle of the pressure half block by ensuring uniform tension of the branches of the pressure line. The handle of an excavator with a pressure head rope mechanism comprises a pressure semi-block mounted with the possibility of reciprocating movement and rotation about an axis from an average position in any direction by an angle of 20-30 °; and provided with a mid-position lock made, for example, in the form of a set screw, and a slider connected to the axis of the pressure half block. On the handle there are longitudinal grooves in which the axle pins are located, and the pressure half-block stream is made on an arc 220-240 °. 1 s.p. f-ly, 3 ill. CO C

Description

The invention relates to techniques related to excavation and soil movement, in particular to single-bucket mine rope excavators, in particular to their handle, equipped with elastic-absorbing links for damping shock loads.

There is a known excavator arm with a pressure head rope mechanism, comprising a pressure semi-block and a check mounted with reciprocal movement and interacting with opposite ends of the elastic-absorbing link.

The working equipment of a single-bucket excavator is most known, the handle of which contains a pressure semi-block installed with the possibility of reciprocating movement with an axis and an elastic-absorbing link in contact with it located in the clamp-stop.

A disadvantage of the considered devices is that their pressure semi-block is in direct contact with the elastic-absorbing link, and its stream is made on an 180 ° arc. This eliminates the possibility of compensating rotation of the pressure semiblock when the arm vibrates during the operation of the excavator. As a result, the rope slips relative to the pressure half block, which causes wear of the last brook and a decrease in the durability of the pressure rope due to the uneven tension of its branches.

An object of the invention is to increase the durability of a pressure line.

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The goal is achieved in that, in the arm of an excavator with a pressure head mechanism, comprising a pressure semi-block with an axis and a stream made on a semi-block arc and an elastic-absorbing link, the pressure semi-block is mounted to rotate relative to the axis from the middle position in any direction at an angle of 20 ... 30 ° and is equipped with a mid-position lock and a slider installed in the handle, and a pressure half block is located in the slider, connected to it by an axis and installed with zmozhnostyu compound with a clamp and contacting it with elastic-absorbing element, thus on the handgrip are made grooves for the positioning of the stud axis and the stream pressure is formed on the arc semiblock 220-240 °. The latch is made in the form of a set screw ..

Figure 1 shows the rear end of the handle, a longitudinal section; figure 2 is the same, a top view; on figs - section aa in fig. 1.

The arm of an excavator with a pressure head rope mechanism contains a pressure half block 1, from which two branches of pressure cable come down 2. The pressure half block is located in slider 3 and connected to it by axis 4. In this case, the pressure half block can rotate around axis 4 from the middle position any direction at an angle of 20 ° -30 °. This rotation is possible until the ribs a of the pressure semi-block 1 abut against the corresponding protrusion b, made on each of the two upper strips 5. The strips 5 are bolted to the handle beam 6 and also serve as block guides preventing the slide 3 from rotating when it is moved longitudinally. The pressure half-block stream is made on an arc 220 ° ... 240 ° in order to enable its rotation. The axle pins 4 are located on both sides. From the slide 3 in the beam g of the handle. An elastic-absorbing link is located inside the handle beam, which consists of three railway absorbing devices 7 installed in parallel in the clamp 8. The clamp 8 is in contact with the cross-member by the internal partition g of the handle beam and is equipped with two shoulders d protruding in the radial direction from the handle beam 4. The shoulders are designed to interact with the saddle bearing of the excavator. The ends of the absorbing apparatus of the same name 7 are in constant interaction with the slider 3 and the clamp 8. The slider 3 and the clamp 8 are installed in the beam 6 of the handle with the possibility of reciprocating movement along its axis. The slider 3 is provided with a latch 9, made in the form of a set screw and intended to be connected to the slider of the pressure half block 1, which is installed in the mid-position angle.

The device operates as follows:

When the excavator is turned, the inertia forces acting on the bucket cause the arm to oscillate in the direction that coincides (during braking or the opposite - during acceleration)

turning the excavator. Oscillations of the arm in the mentioned directions also occur as a result of unbalanced forces acting from the side of the bucket in the process of digging. The consequence of these fluctuations is the uneven tension of the branches of the pressure line coming down from the pressure half-block 1. Under the influence of the uneven tension of the branches, the vibrations of the pressure half-block around the axis pass

4, as a result of which the forces in the branches of the pressure line are equalized, which prevents the pressure line from slipping relative to the pressure half block. Before installing a new pressure line 2

the pressure half unit 1 must be turned into the middle position and connected with the clamp 9 to the slider 3. After the pressure cable is installed, the clamp 9 must be disengaged from the pressure half unit. Otherwise, the operation of the claimed device is similar to the operation of the device according to A.S. No. 975917. The claimed device provides uniform tension of the branches of the pressure line.

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Claims (2)

SUMMARY OF THE INVENTION 1. Handle of an excavator with a pressure head rope mechanism comprising retractably mounted translational displacement of the pressure semi-block with an axis and with a stream made on the arc of the semi-block and an elastically absorbing link, characterized in that, in order to increase the durability of the pressure cable, the pressure semi-block is mounted to rotate about an axis from the middle position in any direction by an angle of 20. ..30 ° and is equipped with a mid-position lock and a slider mounted in the handle, and the pressure half block is located in the slider connected to it by an axis, and is mounted with the possibility of connection with the clamp and the elastic-absorbing link in contact with it, while the handle has longitudinal grooves for 51788997 6 axle axle location, and 2. Handle according to claim 1, with the exception of of the pendant half-block is made on an arc, so that the clamp. Fi.2 Riga 3 A-l