Improved inclined shaft skip bucket traction frame copper sleeve

Abstract

The utility model discloses an improved inclined shaft skip bucket traction frame copper bush, a barrel body is of a split structure and comprises a left half barrel body and a right half barrel body, and one end of each half barrel body is provided with a half outer flanging integrally formed with the half barrel body. After installation, the pair of half cylinder bodies is folded to form a whole cylinder, the half outer turnups of the pair of half cylinder bodies are folded to form a circle of complete outer turnup, and the axis of the cylinder is perpendicular to the plane where the half outer turnups are located. And at least one threaded through hole for disassembly with the axis parallel to the axis of the cylinder is formed in each half outer flange. The copper sleeve can be conveniently taken out from a rotary shaft hole of the traction frame, and convenient replacement of the copper sleeve is achieved; load bearing position change of the copper sleeve can be achieved, and the service life of the copper sleeve is prolonged.

Description

Technical Field

[0001] This utility model relates to a copper sleeve as a wear-resistant component. Background Technology

[0002] The copper sleeve of the inclined shaft skip traction frame is a key component used to reduce friction and wear. Made of copper alloy, it offers advantages such as wear resistance, corrosion resistance, and self-lubrication, and is widely used in mine inclined shaft hoisting systems. The copper sleeve is generally sleeve-shaped, with its inner wall matching the pin shaft and its outer wall fitting into the rotary shaft hole on the traction frame. Some copper sleeves are designed with lubrication grooves or oil holes for easy addition of lubricating oil.

[0003] Currently, most mine blind inclined shaft hoisting systems use rear-discharge skips for secondary hoisting. Rear-discharge skips have a huge hoisting capacity (e.g., up to 26 tons of ore in one cycle). Therefore, the copper bushings on the slewing shaft of the skip traction frame bear a large load under heavy loads, and the load direction is unidirectional. Under unidirectional heavy loads, the bearing points of the copper bushings are easily crushed, and even with good lubrication, the copper bushings will fail quickly, resulting in a short service life. Therefore, frequent replacement of the copper bushings is necessary in actual operation.

[0004] The outer cylinder wall of the copper bushing is embedded in the slewing shaft hole on the traction frame. Under unidirectional heavy load, the bearing point of the copper bushing develops a protrusion due to excessive load, making it difficult to separate from the traction frame. Replacement requires removing the pin before replacing the new copper bushing, which presents problems of high operational difficulty and long maintenance time. A specific disassembly process is as follows: First, lower the skip to the platform, use a hand-operated hoist to lift the traction frame, then remove the round nut back cap of the slewing shaft, then remove the pin, and finally remove the copper bushing. Typically, due to radial shear force, the pin is bent and deformed, making the fit with the bushing too tight, and the pin is difficult to remove. In this case, removing the pin often requires destructive operations. The entire replacement of the copper bushing takes about 6 hours, which is not only labor-intensive but also seriously affects the efficiency of the work. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an improved copper sleeve for the inclined shaft skip traction frame. First, it facilitates the removal of the copper sleeve from the traction frame's rotating shaft hole, enabling convenient replacement of the copper sleeve. Second, it enables the copper sleeve to bear loads in different positions, extending its service life.

[0006] The technical solution of this utility model is as follows:

[0007] An improved inclined shaft skip traction frame copper sleeve includes a cylindrical body for installation between a pin and a rotary shaft hole of the traction frame. The cylindrical body has a split structure, including one half-cylinder on each side. One end of each half-cylinder has a semi-outer flange integrally formed with the half-cylinder. After installation, the pair of half-cylinders fit together to form a complete cylinder, and the semi-outer flanges of the pair of half-cylinders fit together to form a complete outer flange. The axis of the cylinder is perpendicular to the plane where the semi-outer flanges are located. Each semi-outer flange has at least one threaded through hole for disassembly with an axis parallel to the axis of the cylinder.

[0008] Preferably, the outer edge of the semi-outward flange has a straight edge portion; the straight edge portions of a pair of semi-outward flanges are arranged facing each other.

[0009] Preferably, the inner wall of the semi-cylinder is provided with lubricating oil channels; each lubricating oil channel is provided with at least two oil injection holes.

[0010] Compared with existing copper bushings, this utility model has the following advantages:

[0011] First, when the copper sleeve needs to be replaced, it is not necessary to remove the pin. A bolt that matches the threaded through hole for disassembly is used as a set screw. The set screw is placed on the skip traction frame. By rotating the set screw, the outer flange carrying the half-cylinder is pulled out from between the pin and the traction frame rotary shaft hole, realizing easy and quick disassembly and convenient replacement of the copper sleeve.

[0012] Secondly, the cylinder of this utility model has a split structure, which makes it easier to disassemble and replace the parts individually.

[0013] Third, the outer edge of the semi-outwardly flanged part of this utility model has a straight edge portion, and the straight edge portions of the two semi-outwardly flanged parts are arranged facing each other. The straight edge portions facing each other can be more securely held by the two jaws of the clamping tool. After the copper sleeve has been used for a period of time, the clamping tool can be used to more securely clamp the pair of straight edge portions facing each other and flexibly rotate the copper sleeve, change the load-bearing position of the copper sleeve, and extend the service life of the copper sleeve.

[0014] Actual calculations show that rotating the copper bushing to change the load-bearing position according to the wear condition can increase the service life of the copper bushing by more than 3 times and significantly reduce maintenance costs.

[0015] Fourth, actual calculations show that by adopting this utility model, the replacement and maintenance time of the skip copper sleeve is reduced from the original 6 hours to 20 minutes, which greatly reduces the equipment downtime. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the outer end face structure shape of an embodiment of this utility model.

[0017] Figure 2This is a cross-sectional view through the central axis of an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the usage state of an embodiment of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Half-cylinder; 1-1. Oil injection hole; 1-2. Lubricating oil passage; 2. Half-outer flange; 2-1. Threaded through hole for disassembly; 2-2. Straight edge part; 3. Skip wall plate; 4. Fastening nut; 5. Pin; 6. Skip traction frame; 7. Bushing; 8. Regular hexagonal boss. Detailed Implementation

[0020] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0021] like Figure 3 The copper sleeve of this utility model is used to be installed between the pin 5 and the rotary shaft hole of the traction frame 6. Specifically, the traction frame 6 and the copper sleeve are both located on the outer side of the skip wall plate 3 of the inclined shaft skip. The skip wall plate 3 has a mounting hole, and a bushing 7 is fixedly installed at the mounting hole position on the inner side of the skip wall plate 3 by welding. The through hole inside the bushing 7 is divided into two sections. The section closer to the skip wall plate 3 is a circular through hole with the same diameter as the mounting hole, and the section further away from the skip wall plate 3 is machined with a regular hexagonal through hole. The pin 5 is installed in the bushing 7. One end (inner end) of the pin 5 is provided with a regular hexagonal boss 8 that mates with the regular hexagonal through hole of the bushing 7, and the other end (outer end) is provided with a thread, through which a fastening nut 4 is installed. The regular hexagonal through hole and the regular hexagonal boss 8 are used to restrict the relative rotation of the pin 5 and the bushing 7. To ensure that the opening direction of the skip is always upward, when the inclined shaft skip is working, the traction frame 6 and the skip wall plate 3 need to perform relative rotational motion. During this rotational motion, the copper sleeve rotates around the pin shaft 5 with the traction frame 6.

[0022] like Figure 1 and Figure 2 An embodiment of the copper sleeve of this utility model includes a cylindrical body for installation between the pivot pin 5 and the rotary shaft hole of the traction frame 6. The cylindrical body has a split structure, including one left and one right half-cylinder 1, and one end of each half-cylinder 1 has a semi-outer flange 2 integrally formed with the half-cylinder 1. After installation, the pair of half-cylinder 1 are joined to form a complete cylinder, and the semi-outer flanges 2 of the pair of half-cylinder 1 are joined to form a complete outer flange, and the axis of the cylinder is perpendicular to the plane where the semi-outer flange 2 is located.

[0023] To ensure good lubrication during rotation, the inner wall of the semi-cylinder 1 is provided with lubrication oil passages 1-2, and each lubrication oil passage 1-2 has three oil injection holes 1-1, such as... Figure 2 .

[0024] Each semi-outer flange 2 has at least one (three in this embodiment) threaded through hole 2-1 for disassembly, with its axis parallel to the axis of the cylinder. When the copper sleeve needs to be replaced, a bolt that mates with the threaded through hole 2-1 for disassembly is used as a set screw. The set screw is pressed against the outer wall plate of the skip traction frame 6. By rotating the set screw, the semi-outer flange 2, carrying the semi-cylinder 1, is pulled out from between the pin and the rotation shaft of the traction frame.

[0025] Furthermore, the outer edge of the semi-outer flange 2 has a straight edge portion 2-2, and the straight edge portions 2-2 of a pair of semi-outer flanges 2 are arranged facing each other. Specifically, in this embodiment, each semi-outer flange 2 has two straight edge portions 2-2. Figure 1 The upper straight edge 2-2 of the right half-outward flange 2 is directly opposite the lower straight edge 2-2 of the left half-outward flange 2, and the lower straight edge 2-2 of the left half-outward flange 2 is directly opposite the upper straight edge 2-2 of the right half-outward flange 2. This design ensures that the directly opposite straight edges 2-2 are more securely gripped by the two jaws of the clamping pliers. After the copper sleeve has been used for a period of time, the clamping tool can be used to more securely grip the pair of directly opposite straight edges and flexibly rotate the copper sleeve to change the load-bearing position.

Claims

1. An improved inclined shaft skip traction frame copper sleeve, comprising a cylinder for mounting between a pin (5) and a traction frame (6) rotary shaft hole, characterized in that: The cylinder is a split structure, including a left and a right half-cylinder (1). One end of the half-cylinder (1) has a semi-outer flange (2) integrally formed with the half-cylinder (1). After installation, the pair of half-cylinders (1) are joined to form a complete cylinder, and the semi-outer flanges (2) of the pair of half-cylinders (1) are joined to form a complete outer flange. The axis of the cylinder is perpendicular to the plane where the semi-outer flange (2) is located. Each semi-outer flange (2) has at least one threaded through hole (2-1) for disassembly with an axis parallel to the axis of the cylinder.

2. The improved inclined shaft skip traction frame copper sleeve as described in claim 1, characterized in that: The outer edge of the semi-outer flange (2) has a straight edge portion (2-2); the straight edge portions (2-2) of a pair of semi-outer flanges (2) are arranged opposite each other.

3. The improved inclined shaft skip traction frame copper sleeve as described in claim 1 or 2, characterized in that: The inner wall of the semi-cylinder (1) is provided with lubricating oil passages (1-2); each lubricating oil passage (1-2) is provided with at least two oil injection holes (1-1).

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