Steel wire rope pulley connecting device of drill jumbo for mine

Abstract

The utility model discloses a steel wire rope pulley connecting device of a drill jumbo for a mine. A pulley yoke for mounting a steel wire rope pulley is provided with a groove formed by two side plates and a bottom plate; a round hole is formed in the center of the bottom plate, and a pulley yoke insertion positioning pin is fixed in the round hole. The steel wire rope pulley is mounted on the pulley seat pin shaft; the two side plates are respectively provided with a side plate shaft hole, and the pulley seat pin shaft is installed in the shaft holes. An outer ring of the bearing is assembled in a mounting hole in the inner side of the steel wire rope pulley and is axially limited by a spring collar, and an inner ring of the bearing is mounted on the pulley seat pin shaft. The utility model solves the problems that the relative positioning difficulty of a passive traction bearing device and a pulley yoke bearing device is high and the dismounting difficulty of a steel wire rope pulley mechanism is high.

Description

Technical Field

[0001] This utility model relates to a pulley connection device, specifically a wire rope pulley connection device for a mining rock drilling rig, belonging to the technical field of underground mining rock drilling equipment. Background Technology

[0002] With the continuous improvement of mechanization and automation in my country's metal and non-metal mines, a large number of rock drilling equipment have been applied to mining operations. During the drilling process on a rock drilling rig, the drill rod is prone to bending in the middle section under the combined action of the rock drill's impact and propulsion forces. Therefore, it is necessary to install a drill support sleeve in the middle and front section of the drill rod to support and guide the drill rod of the rock drill, so as to ensure that the axes of the drill rod, the drill shank, and the drill bit remain consistent during the straight drilling operation, thus ensuring the stability and accuracy of the drilling.

[0003] To further improve the drilling efficiency and accuracy of rock drilling rigs, the rock drill and the central support sleeve typically need to work together. This is achieved through the combination of hydraulic cylinders and pulley mechanisms, enabling efficient power transmission and motion control. Specifically, a wire rope pulley mechanism is added to the front end (piston rod end) of the cylinder, converting the linear motion of the cylinder into the linear motion required by the central support sleeve.

[0004] During heavy-load drilling operations, the wire rope pulley mechanism, serving as the load-bearing structure of the rock drill and the linkage transmission unit for the central support sleeve, is highly susceptible to damage under high-intensity, heavy-load forces. The ability to quickly replace vulnerable parts such as wire rope pulleys, wire ropes, and bearings directly impacts the efficiency and quality of rock drilling operations.

[0005] On the other hand, existing technologies present the problem of difficulty in relatively positioning the passive traction bearing device and the pulley frame bearing device. Specifically, during the rock drill's propulsion process, after the hydraulic cylinder's propulsion force is transmitted to the pulley mechanism, the pulley mechanism's wire rope acts as a separate linkage mechanism for traction of the passive traction bearing device and the central support sleeve, which move linearly along the hydraulic cylinder's propulsion direction. Because the central support sleeve and the pulley mechanism are designed as separate units, and the passive traction bearing device and the central support sleeve are connected by a flexible wire rope, it often leads to difficulties in positioning the central support sleeve relative to the passive traction bearing device. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a wire rope pulley connection device for a mining rock drilling rig. First, it solves the problem of the difficulty in relative positioning between the passive traction bearing device and the pulley frame bearing device; second, it solves the problem of the difficulty in disassembling and assembling the wire rope pulley mechanism.

[0007] The technical solution of this utility model is as follows:

[0008] A wire rope pulley connection device for a mining drilling rig includes a pulley frame for mounting the wire rope pulley. The pulley frame is composed of a groove formed by a third steel plate, a second steel plate, and a first steel plate. The first steel plate is the bottom plate of the groove, and its inner side is fixed to the inner ends of the third and second steel plates. The third and second steel plates are the side plates of the groove. A circular hole is opened at the center of the first steel plate, and a pulley frame insertion positioning pin is fixed in the circular hole. The wire rope pulley is mounted on a pulley seat pin. Side plate shaft holes are respectively opened on the third and second steel plates, and the pulley seat pin is installed in the shaft holes. The connection device also includes a bearing. The outer ring of the bearing is assembled in the inner mounting hole of the wire rope pulley and is axially limited by a spring retaining ring, and the inner ring is mounted on the pulley seat pin.

[0009] Preferably, the pulley frame has an annular pressure relief groove and a radial positioning hole on the outer side of the insertion positioning pin.

[0010] Preferably, the pulley seat pin has a pin hole; the lower side of the second steel plate has a limiting hole for cooperating with the pin hole; and a limiting pin for axially limiting the pulley seat pin is inserted into the pin hole and the limiting hole.

[0011] Preferably, the outer ends of the third steel plate and the second steel plate are respectively machined with L-shaped bosses, and the outer end faces are respectively provided with threaded holes for the installation and limiting of the front mudguard.

[0012] Preferably, the lower sides of the second and third steel plates are provided with a number of threaded holes for connecting with the pulley frame support device.

[0013] Preferably, the wire rope pulley is equipped with an oil injection nozzle.

[0014] The beneficial effects of this utility model are as follows:

[0015] First, to solve the problem of difficulty in positioning the relative position of the passive traction bearing device and the pulley frame bearing device, this utility model connects the central support rod sleeve and the pulley frame with bolts through threaded holes, making the central support rod sleeve and the pulley frame an integral operating unit. The steel wire rope of the pulley mechanism directly serves as the linkage mechanism for the passive traction bearing device to move in a straight line. At the same time, the relative position of the passive traction bearing device and the pulley frame bearing device is ensured by adjusting the length of the positioning hole.

[0016] Secondly, to solve the problem of difficult disassembly and assembly of wire rope pulley mechanisms, this utility model is designed with a pulley frame insertion positioning pin at the pulley frame connection end, which can be connected to the positioning hole of the connecting oil cylinder. It can be quickly disassembled and assembled with the propulsion oil cylinder by locking bolts, ensuring that the wire rope pulley mechanism can be quickly disassembled and assembled in a favorable environment outside the machine, thus solving the problem of difficult disassembly and assembly of pulleys and bearings in the narrow space of the machine. Attached Figure Description

[0017] Figure 1 This is an exploded view that serves as a structural schematic diagram of an embodiment of this utility model;

[0018] Figure 2 This is a top view of an embodiment of the present invention after assembly;

[0019] Figure 3 This is a side view of an embodiment of the present invention after assembly.

[0020] Explanation of reference numerals in the attached drawings: 1. Pulley frame; 1-1. First steel plate; 1-2. Second steel plate; 1-3. Third steel plate; 1-4. Side plate shaft hole; 1-5. Side plate threaded hole; 1-6. Threaded hole; 2. Pulley seat pin; 2-1. Pin hole; 3. Spring retaining ring; 4. Wire rope pulley; 5. Oil nozzle; 6. Bearing; 7. Pulley frame insertion positioning pin; 7-1. Positioning hole; 7-2. Pressure relief groove; 8. Limit pin; 10. Locking bolt. Detailed Implementation

[0021] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0022] like Figure 1 and Figure 2 As shown, this embodiment includes a pulley frame 1 for mounting the wire rope pulley 4. The pulley frame 1 is formed by welding a third steel plate 1-3, a second steel plate 1-2, and a first steel plate 1-1, all made of Q235 material and with a thickness greater than 10mm, to form a groove, thus creating a mounting and protective frame for the pulley mechanism. The first steel plate 1-1 is the bottom plate of the groove, and its inner side is welded to the inner ends of the third steel plate 1-3 and the second steel plate 1-2. The third steel plate 1-3 and the second steel plate 1-2 are the two side plates of the groove. A circular hole is formed at the center of the first steel plate 1-1, and a pulley frame insertion positioning pin 7 is fixed in this hole. The diameter of the circular hole is adapted to the outer diameter of the pulley frame insertion positioning pin 7. The distance between the third steel plate 1-3 and the second steel plate 1-2 meets the axial dimension requirements of the wire rope pulley 4. The pulley frame insert positioning pin 7 has an annular pressure relief groove 7-2 and a radial positioning hole 7-1 on its outer side. The length of the pulley frame insert positioning pin 7 is adjusted according to the limiting requirements between the traction bearing device and the pulley frame bearing device, and the diameter is adjusted according to the tensile and compressive strength of the material. The axis of the pulley frame insert positioning pin 7 coincides with the axis of the circular hole in the first steel plate 1-1. The pulley frame 1 and the pulley frame insert positioning pin 7 are connected by welding. In use, the insert end of the positioning pin 7 is inserted into the mating hole of the propulsion cylinder. When the positioning hole 7-1 coincides with the axis of the cylinder positioning hole, it is locked with a locking bolt 10.

[0023] The wire rope pulley 4 is mounted on the pulley seat pin 2, which has a pin hole 2-1. Side plate shaft holes 1-4 are respectively formed on the third steel plate 1-3 and the second steel plate 1-2, the diameter of which is adapted to the pulley seat pin 2. L-shaped bosses are machined on the outer ends of the third steel plate 1-3 and the second steel plate 1-2, and respectively, the outer end faces of which are provided with… Figure 3 The threaded holes 1-5 shown are used for the installation and limiting of the front mudguard.

[0024] A limiting hole is provided on the lower side of the second steel plate 1-2 for engaging with the pin hole 2-1. When the limiting hole coincides with the axis of the pin hole 2-1 on the pulley seat pin 2, a limiting pin 8 is inserted to axially limit the pulley seat pin 2. Several threaded holes 1-6 are also provided on the lower sides of the second steel plate 1-2 and the third steel plate 1-3, which are used to connect with the pulley frame support device.

[0025] This embodiment also includes a bearing 6. The outer ring of the bearing 6 is fitted into the mounting hole inside the wire rope pulley 4 and is axially limited by a spring retaining ring 3, while the inner ring is mounted on the pulley seat pin 2. The spring retaining ring 3, the wire rope pulley 4, the bearing 6, and the pulley seat pin 2 are aligned on the same axis, forming a wire rope pulley mechanism. The wire rope pulley mechanism is arranged in the groove formed by welding the third steel plate 1-3, the second steel plate 1-2, and the first steel plate 1-1. The pulley seat pin 2 is installed in the shaft hole 1-4 and is limited by the limiting pin 8.

[0026] There are two grease nipples 5, which are threadedly connected and installed on both sides of the groove of the wire rope pulley 4. The grease nipples 5 are 6mm grease nipples according to national standards. There is a lubrication channel on the inside of the wire rope pulley. After the grease is added, the grease reaches the bearing 6 through the lubrication channel.

[0027] This utility model primarily serves as a linkage mechanism for the central support drill sleeve, guiding the drill rod and ensuring the straightness and stability of the drilling. The pulley frame 1, acting as a support and connecting structure for the pulley, is connected to the central support drill sleeve via bolts that mate with the threaded holes 1-6, making the pulley mechanism and the central support drill sleeve a single unit, typically fixed to the rock drilling rig's propulsion system. One end of the wire rope, bypassing the wire rope pulley 4, is connected to the passive traction device (rock drill) of the rock drilling rig, while the other end is connected to the main body of the rig via a connector. The linear motion of the hydraulic cylinder is converted into the linear motion required between the rock drill and the central support drill sleeve through this linkage mechanism.

[0028] After applying grease to the wire rope pulley 4 through the grease fitting 5, the wire rope is routed around the groove of the wire rope pulley 4, with one end connected to the rock drill and the other end connected to the fixing device. The equipment is started, and the propulsion cylinder is pushed. The wire rope drives the central support frame base and the rock drill base to move in a uniform linear motion along the extension direction of the propulsion cylinder. The positions of the central support frame base and the rock drill base remain fixed during this uniform linear motion.

[0029] The above are preferred embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present application should be covered within the scope of protection of the present utility model.

Claims

1. A wire rope pulley connection device for a mining drilling rig, comprising a pulley frame (1) for mounting wire rope pulleys (4), wherein the pulley frame (1) is composed of a groove formed by a third steel plate (1-3), a second steel plate (1-2), and a first steel plate (1-1); the first steel plate (1-1) is the bottom plate of the groove, and its inner side is fixed to the inner ends of the third steel plate (1-3) and the second steel plate (1-2), and the third steel plate (1-3) and the second steel plate (1-2) are the two side plates of the groove; characterized in that: A circular hole is opened at the center of the first steel plate (1-1), and a pulley frame insertion positioning pin (7) is fixed in the circular hole; the wire rope pulley (4) is installed on the pulley seat pin (2); the third steel plate (1-3) and the second steel plate (1-2) are respectively provided with side plate shaft holes (1-4), and the pulley seat pin (2) is installed in the shaft hole (1-4); the connecting device also includes a bearing (6); the outer ring of the bearing (6) is assembled in the inner mounting hole of the wire rope pulley (4) and is axially limited by a spring retaining ring (3), and the inner ring is installed on the pulley seat pin (2).

2. The wire rope pulley connection device for a mining drilling rig as described in claim 1, characterized in that: The pulley frame insert positioning pin (7) has an annular pressure relief groove (7-2) and a radial positioning hole (7-1) on its outer side.

3. The wire rope pulley connection device for a mining drilling rig as described in claim 1, characterized in that: The pulley seat pin (2) has a pin hole (2-1); the second steel plate (1-2) has a limiting hole on its lower side for cooperating with the pin hole (2-1); a limiting pin (8) for axially limiting the pulley seat pin (2) is inserted into the pin hole (2-1) and the limiting hole.

4. The wire rope pulley connection device for a mining drilling rig as described in claim 1, characterized in that: The outer ends of the third steel plate (1-3) and the second steel plate (1-2) are respectively machined with L-shaped bosses, and the outer end faces are respectively provided with threaded holes (1-5) for the installation and limiting of the front mudguard.

5. The wire rope pulley connection device for a mining rock drilling rig as described in claim 1, characterized in that: The second steel plate (1-2) and the third steel plate (1-3) are also provided with several threaded holes (1-6) on their lower sides for connecting with the pulley frame support device.

6. The wire rope pulley connection device for a mining drilling rig as described in claim 1, characterized in that: The wire rope pulley (4) is equipped with an oil nozzle (5).

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