Efficient heading machine conveying mechanism easy to disassemble and assemble

Abstract

The utility model discloses an efficient and easy-to-assemble and disassemble heading machine conveying mechanism which comprises a hopper fixed on a rack, a driven wheel assembly and a driving wheel assembly which are respectively assembled at the tail parts of the low end and the high end of the hopper, a plate type transmission chain bridged on the driving wheel assembly and the driven wheel assembly, and scrapers fixed on two sides of the transmission chain, the cross section of the lower end of the scraper is in a corner angle shape, the driving wheel assembly comprises a driving wheel shaft and a shaft sleeve welded and fixed to the middle of the driving wheel shaft, the shaft sleeve is provided with two circular flanges arranged at intervals, and a driving chain wheel is arranged in a cavity between the circular flanges. Inner end covers are arranged at the two ends of the connecting shaft respectively, and an oil injection hole is formed in the connecting shaft. The transmission friction resistance is reduced, the material conveying efficiency is improved, the failure rate is reduced, the service life is prolonged, the structure is simpler, and disassembly and assembly are simpler and more convenient; and the operation and maintenance cost and the production time are effectively reduced.

Description

Technical Field

[0001] The utility model relates to a material feeding mechanism, in particular to a material feeding mechanism mainly used in conjunction with a tunnel boring machine (anchor boring machine) and a scraper conveyor in a tunnel mine. Background Art

[0002] A roadheader (anchor boring machine) is a machine used for non-blasting excavation in tunnels and mines. It is mainly composed of a cutting part, a shovel part, a traveling mechanism, a main body, a pump station hydraulic system, an operating console and a first conveying mechanism. Among them, the conveying mechanism is an important transmission component, which is generally composed of a conveying shovel, a transport trough, a driving wheel assembly, a driven wheel assembly, a transmission chain and a scraper. It has the characteristics of large transport carrying capacity, high efficiency, maximum friction, wear and resistance. The shape, structure, performance and combination of the driving wheel group, the driven wheel group, the trough bottom plate and the scraper chain group directly affect the efficiency and failure rate as well as the service life, maintenance convenience and operating cost. Specifically, the existing tunneling machines still have the following problems in use: First, since the existing tunneling machines use sprockets in the shape of a circular chain and a chain nest for transmission, the chain fluctuation caused by the contact between the circular chain and the secondary force-bearing surface of the sprocket chain nest, thereby covering up the wear and deformation effect of the circular chain pitch on the chain fluctuation, as well as the influence of the chain tension, the circular chain and the sprocket meshing are not smooth, the meshing jump is large, the frequent sliding collapse, the skewed teeth and the chain are off, the driving force is affected, and the meshing process is easy to cause the chain ring to deform in the sprocket nest due to heavy load, wear, oblique chain and strong chain pulling. It is more likely to cause the chain to jump and deviate. When the transportation angle is large, the "pull collapse" phenomenon occurs, the material transportation failure rate is high, the efficiency is low, and it is not durable; the changes in the tightness, wear and deformation, and pitch elongation of the round chain of the double-chain scraper are easy to cause the chain to jump and collapse, increase the motor load, cause the hydraulic oil temperature to rise, and reduce the loading and transportation efficiency of the tunnel boring machine; secondly, the existing tunnel boring machine uses a low-flat scraper, the low-flat scraper and the bottom plate of the transport trough have a large friction surface and are not durable, the transportation resistance is large and easy to change, the material is low and the material consumption is small, especially The conveying efficiency is lower for larger materials and on slopes, and the connection with the ring chain is complex and unstable. In particular, the double-chain single scraper is prone to faults such as oblique chain and oblique pull during operation. Third, the driving wheel assembly and driven wheel assembly of the existing tunnel boring machine are moving and wearing parts. Their structure is very complex and bulky, with high cost and cumbersome disassembly and assembly. The entire transmission unit must be disassembled for replacement, and replacement takes an entire shift, which is very time-consuming and laborious. The main sprocket socket shape is complex to combine with the ring chain, and the operating principle is also complex and has many hidden dangers. Utility Model Content

[0003] In view of the problems existing in the conveying mechanisms of tunnel boring machines (anchor diggers) and scraper conveyors in the above-mentioned prior art, a conveying mechanism for tunnel boring machines and other equipment is provided, which not only has smoother conveying drive connection, smaller conveying resistance, higher conveying efficiency, and lower conveying failure rate, but also has a simpler structure and is also convenient to manufacture, sprocket damage, disassembly and maintenance.

[0004] The technical solution adopted by the utility model to solve the technical problem is: an efficient and easily disassembled conveying mechanism of a roadheader, comprising an inclined hopper fixed on a frame, a driven wheel assembly and a driving wheel assembly respectively mounted on the tail of the lower end and the higher end of the hopper, a transmission chain spanning the driving wheel assembly and the driven wheel assembly, and scrapers fixed on both sides of the transmission chain, wherein the transmission chain is a plate chain, the upper end of the scraper is fixed on the plate chain, and the cross section of the lower end is angular, the driving wheel assembly comprises a driving wheel shaft, a spline sleeve welded and fixed at both ends of the driving wheel shaft, and a driving wheel shaft fixed on the driving wheel shaft. The shaft sleeve in the middle of the wheel axle has two circular flanges set at intervals. A driving sprocket is fixedly arranged in the cavity between the circular flanges. The driving sprocket is composed of two parts. The driven wheel assembly includes a driven wheel shaft. The driven wheel shaft is mounted on the connecting shaft through a bearing. The two ends of the connecting shaft are respectively provided with an upper end and a lower end respectively abutting against the driven wheel shaft and the end surface of the bearing, and the other end is fixedly connected to the support tube. A skeleton and a retaining spring are arranged between the inner end cover and the bearing. An oil filling hole for passing lubricating oil into the bearing is arranged at one end of the connecting shaft.

[0005] The utility model replaces the circular chain on the tunnel boring machine (anchor digger) and the scraper conveyor with a plate chain. The plate chain has high tensile strength, high impact toughness, wear resistance and corrosion resistance. The tensile strength is 15% to 30% higher than that of the ordinary circular chain, and it has good impact resistance and fatigue resistance; the two chain plates are more stable in operation and are not prone to chain jumping and chain flipping, and can be better combined with scrapers of various shapes; the hyperbolic arc active chain barrel rolls to reduce the friction between the sprocket and the chain, and is not prone to sliding, deviating teeth and chain derailment; the plate chain rotates more smoothly and flexibly, meshes more smoothly with the driving sprocket and the driven wheel sprocket, and the rapid bite is smoother, reducing the energy loss in the power transmission process to obtain a higher transmission Efficiency, so that the chain drive can obtain more obvious advantages; secondly, the low-flat scraper of the existing roadheader is designed into a diamond-shaped and arc-shaped scraper, so that the contact area between the lower end of the scraper and the bottom plate of the transport trough is reduced, and the original surface contact is changed to diamond-shaped surface contact, reducing transmission friction and resistance; changing the shape of the material block is more conducive to feeding efficiency, especially the larger model of the transport trough can use an arc scraper double chain single scraper chain group, and the material feeding efficiency is doubled; thirdly, the driving wheel assembly and the driven wheel assembly are designed into a structural assembly with a simpler structure and a shape that is more in line with the principle of plate chain transmission, so as to achieve efficient, durable and less fault-prone transformation; better integration with the original conveying mechanism components of the roadheader and other original components with less modification, maintenance, disassembly and replacement are simpler and faster.

[0006] The utility model replaces the transmission chain and scraper of the conveying mechanism of the existing tunnel boring machine (anchor digger) and scraper conveyor, and improves the structure of the driven wheel assembly and the driving wheel assembly. The transformation is divided into two structures: a single-chain double diamond scraper chain group and a double-chain single arc scraper chain group. The perfect combination of the transportation mechanism trough body, drive motor components and other components of the tunnel boring machine (anchor digger) and scraper conveyor without destroying or modifying them greatly not only reduces friction and resistance, greatly improves material conveying efficiency, greatly reduces failure rate and prolongs service life, but also has a simpler structure, simpler and more convenient disassembly and assembly; durable and less faulty, effectively reducing operating and maintenance costs and production time; this mechanism is more widely adapted to the transmission of various materials and ore rock block sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic diagram of the main structure of the utility model.

[0008] Figure 2 It is a top view structural schematic diagram of the utility model.

[0009] Figure 3 It is a partial top view of the plate chain and scraper structure.

[0010] Figure 4 yes Figure 3 Schematic diagram of the X-direction structure,

[0011] Figure 5 It is a schematic diagram of the cross-sectional structure of the driving sprocket shaft assembly.

[0012] Figure 6 yes Figure 5 AA cross-sectional structure diagram,

[0013] Figure 7 yes Figure 5 Schematic diagram of the Y-direction structure,

[0014] FIG8 is a schematic cross-sectional view of the driven sprocket shaft assembly.

[0015] Fig. 9 This is a left-side structural diagram of the driven sprocket.

[0016] In the figure, 1, driven wheel shaft 2, driven sprocket 3, feed end 4, scraper 5, transmission chain 6, bottom plate 7, hopper mounting plate 8, hopper 9, discharge end 10, driving sprocket 11, driving wheel shaft 12, mounting screw 13, hanging plate 14, shaft seat 15, outer chain plate 16, inner chain plate 17, scraper fastening screw 18, flat key 19, shaft sleeve 20, driving sprocket fixing screw 21, joint seam 22, spline teeth 23, spline sleeve 24, welding area 25, circular flange 26, lower keyway 27, elastic pad 28, nut 29, oil filling hole 30, upper keyway 31, support tube 32, inner end cover 33, connecting shaft 34, retaining spring 35, skeleton 36, bearing 37, oil hole plug. DETAILED DESCRIPTION

[0017] In the figure, an efficient and easily disassembled conveying mechanism for a roadheader is shown, comprising an inclined rectangular hopper 8 fixed to a roadheader frame by a hopper mounting plate 7 and a mounting screw 12, a driving wheel assembly and a driven wheel assembly mounted on the high end (discharging end 9) and the low end (feeding end 3) of the hopper, a transmission chain 5 straddling the driving wheel assembly and the driven wheel assembly, and a scraper 4 (a high-strength forged steel or cast steel scraper) fixed on both sides of the transmission chain and having an angular cross-section (or an arc shape), a hanging plate 13 welded to the upper end of the scraper, the hanging plate being fixed to the outer chain plate 15 of the plate chain by a scraper fastening screw 17, and a high end (right end, such as Figure 1 The discharge end 9, the lower end of the hopper (left end - Figure 1The feeding end 3), the bottom plate 6 of the hopper is inclined at the same time as the transmission chain 5, and the transmission chain 5 is higher than the bottom plate. The transmission chain is a plate chain (a plate chain is formed by connecting a number of sub-chains in series), each sub-chain is composed of two separated outer chain plates, two separated inner chain plates 16 located in the outer chain plates, a column tube, and a screw. The outer chain plate and the inner chain plate of each sub-chain are movably connected end to end to form a plate chain). The scraper chain group is divided into two forms, one is a single-chain double diamond scraper chain group, and the other is a double-chain single arc scraper chain group. The upper end of the scraper is welded and fixed on the hanging plate, and the hanging plate is supported by a scraper The fixing screw 17 is fixed on the outer link plate of the plate chain, and the lower end of the scraper is angular. The driving wheel assembly includes a driving wheel shaft 11, a spline sleeve 23 welded and fixed at both ends of the driving wheel shaft, and a sleeve 19 fixed in the middle of the driving wheel shaft. The spline sleeve has a spline 22, and the sub-mouth on the spline sleeve extends into the end face of the driving wheel shaft and is fixedly connected into one body by a welding area 24. Lower key grooves 26 are respectively provided in the upper and lower parts of the middle of the driving wheel shaft, and an upper key groove 30 opposite to the lower key groove is provided in the sleeve. The sleeve is connected to the driving wheel shaft by a flat key 18, an upper key groove 30 and a lower key groove 26. The shaft sleeve is provided with two circular flanges 25 arranged at intervals, and a driving sprocket 10 is fixedly arranged in the cavity spaced between the circular flanges. Both ends of the driving wheel shaft are movably connected to the shaft seat 14, and the rear end is connected to the motor and the reducer. The thickness of the driving chain is in a loose sliding fit with the cavity. The driving sprocket is composed of two parts, which are movably placed in the cavity spaced between the circular flanges. The two parts of the driving sprocket are combined through a splicing seam 21 and are fastened to the shaft sleeve to form a whole with a driving sprocket fixing screw 20, an elastic pad 27 and a nut 28 (since the teeth of the driving sprocket are easily damaged, the driving sprocket can be manufactured as a whole and then cut, or it can be manufactured separately in two parts. The disassembly and assembly of the driving wheel of the existing tunneling machine requires the entire driving wheel shaft roller to be completely disassembled. In comparison, the driving sprocket described in the utility model can be easily pulled out from the periphery of the shaft sleeve by loosening the driving sprocket fixing screw 20 when folding. Similarly, the replacement driving sprocket can also be quickly assembled). The driven wheel assembly includes a driven wheel shaft 1 and a driven sprocket 2 integrally formed with the driven sprocket shaft. The driven wheel shaft 1 is mounted on a connecting shaft 33 through a bearing 36. The two ends of the connecting shaft are respectively provided with inner end covers 32, one end of which is in contact with the bearing at the lower part and in contact with the end face of the driven wheel shaft at the upper part, and the other end is fixedly connected to a support tube 31. A skeleton 35 and a retaining ring 34 are provided between the inner end cover and the bearing. An oil injection hole 29 for passing lubricating oil into the bearing is provided in the middle of one end of the connecting shaft, and an oil hole plug 37 is provided at one end of the oil injection hole. When the driven sprocket is replaced, the integral driven sprocket 2 and the driven wheel shaft 1 can be easily and quickly replaced by pulling out the support tube, taking out the end cover and the bearing.

Claims

1. A highly efficient and easily disassembled conveying mechanism for a roadheader, comprising an inclined hopper (8) fixed to a frame, a driven wheel assembly and a driving wheel assembly respectively mounted at the lower and upper tails of the hopper, a transmission chain (5) straddling the driving wheel assembly and the driven wheel assembly, and scrapers fixedly arranged on both sides of the transmission chain, wherein: The transmission chain is a plate chain, the upper end of the scraper is fixed on the plate chain, and the cross section of the lower end is angular. The driving wheel assembly comprises a driving wheel shaft (11), a spline sleeve (23) welded and fixed to both ends of the driving wheel shaft, and a sleeve (19) fixed in the middle of the driving wheel shaft. The sleeve has two circular flanges (25) arranged at intervals, and a driving sprocket (10) is fixedly arranged in the cavity between the circular flanges. The driving sprocket is composed of two parts. The driven wheel assembly comprises a driven wheel shaft (1), and the driven wheel shaft is mounted on the connecting shaft (33) through a bearing. The two ends of the connecting shaft are respectively provided with an upper end and a lower end respectively abutting against the driven wheel shaft and the end surface of the bearing, and the other end is fixedly connected to the support tube (31). A skeleton (35) and a retaining ring (34) are provided between the inner end cover and the bearing. An oil injection hole (29) for passing lubricating oil into the bearing is provided at one end of the connecting shaft.

2. The high-efficiency and easily disassembled conveying mechanism for a roadheader according to claim 1 is characterized by: The shaft sleeve (19) is connected to the driving wheel shaft (11) by means of a flat key (18), an upper keyway (30) and a lower keyway (26).

3. The high-efficiency and easily disassembled conveying mechanism for a roadheader according to claim 1 is characterized by: The scraper (4) has an arc-shaped cross section.

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