Excavating mechanism of rock tube push bench

Abstract

The utility model discloses a rock push bench excavation mechanism, including cutterhead, main shaft, transmission mechanism, gear box, drive motor, movable shell, fixed shell and deviation rectifying mechanism, wherein the main shaft is rotatablely installed on the gear box, the gear box is fixedly installed in the movable shell, the main shaft is connected with cutterhead, the transmission mechanism is installed on the gear box, and the drive motor is installed on the gear box. The multiple driving motors are connected with the main shaft through a transmission structure, and the movable shell and the fixed shell are connected through a deviation rectifying mechanism. According to the utility model, the plurality of driving motors jointly drive the main shaft to rotate so as to realize the rotation of the cutterhead to carry out the digging action, the requirements on the power, the volume and the cost of a single motor are lower, and the movable shell and the deviation correcting mechanism are also arranged, so that the movable shell can swing to a certain extent when the cutterhead is locally and instantly impacted, and the deviation correcting mechanism can correct the deviation of the cutterhead. And in addition, the deviation rectifying mechanism is arranged, so that the cutter head can be conveniently reset after the cutter head deviates.

Description

Technical Field

[0001] The utility model relates to the field of construction equipment design, in particular to an excavation mechanism of a rock pipe jacking machine. Background Art

[0002] Rock pipe jacking machines are used in many construction projects, such as subway construction, tunnel construction, drainage pipeline construction, and coal mine construction. Rock pipe jacking machines are used to dig through rock layers to facilitate construction space and ensure efficient construction.

[0003] Rock pipe jacking machines often include an excavation mechanism, which is used to contact the rock layer and can crush and excavate the rock. Common excavation mechanisms are mostly rotary and rely on motor drive. Existing rotary rock pipe jacking machine excavation mechanisms mostly rely on single motor drive, but because rock excavation requires a lot of power, only using a single motor drive requires high power from the motor, which will result in a large size of the single motor, high production cost, and high difficulty. In addition, once the motor fails, the excavation construction cannot continue at all, affecting construction efficiency. On the other hand, the excavation part of a common excavation mechanism is usually large, and the instantaneous impact degree of different positions thereof varies greatly. If the excavation part is set in a fixed form in the straight line direction, the excavation part is easily damaged by instantaneous impact. Utility Model Content

[0004] The purpose of the utility model is to provide an excavation mechanism of a rock pipe jacking machine, which can solve one or more of the above problems.

[0005] According to one aspect of the utility model, a rock jacking machine excavation mechanism is provided, including a cutterhead, a main shaft, a transmission mechanism, a gear box, a drive motor, a movable shell, a fixed shell and a correction mechanism, the main shaft is rotatably mounted on the gear box, the gear box is fixedly mounted in the movable shell, the main shaft and the cutterhead are connected, the transmission mechanism is mounted on the gear box, there are multiple drive motors, and the multiple drive motors are connected to the main shaft through a transmission structure, and the movable shell and the fixed shell are connected through the correction mechanism.

[0006] The beneficial effects of the present invention are as follows: in the present invention, multiple drive motors are used to jointly drive the main shaft to rotate, thereby realizing the rotation of the cutter disc for excavation, and the power, volume and cost requirements of a single motor are relatively low, and even if a motor fails, the construction can still be maintained for a short time, which can effectively ensure the construction efficiency. In addition, a movable shell and a correction mechanism are provided. The movable shell enables the cutter disc to swing to a certain extent when it is locally impacted instantaneously, thereby playing a certain buffering role, and the correction mechanism is provided to facilitate the reset of the cutter disc after it is offset.

[0007] In some embodiments, the transmission mechanism includes a driving roller and a driven wheel. There are multiple driving rollers, each of which is connected to a plurality of drive motors in a one-to-one correspondence. Each driving roller is provided with a driving wheel, and the driving wheels on all the driving rollers mesh with the driven wheels. Thus, the multiple drive motors can simultaneously drive the driven wheels to rotate via the multiple driving rollers.

[0008] In some embodiments, the driven wheel includes a driven outer wheel and a driven inner wheel, the driven outer wheel having outer and inner teeth, the outer teeth meshing with the driving wheel, and the inner teeth meshing with the driven inner wheel, wherein the driven inner wheel is sleeved on the main shaft. When necessary, the driven outer wheel and the driven inner wheel can be separated to cut off power to the main shaft, thereby improving the safety of the present invention.

[0009] In some embodiments, the corrective mechanism includes a corrective cylinder, a first hinge seat, and a second hinge seat. The first hinge seat is connected to the movable housing, and the second hinge seat is connected to the second housing. The corrective cylinder includes a cylinder body and a piston rod. The piston rod is hingedly connected to the first hinge seat, and the cylinder body is hingedly connected to the second hinge seat. The corrective cylinder can rotate to match the swing of the movable housing to prevent interference between the two.

[0010] In some embodiments, the correction mechanism includes a first connecting block and a first pin shaft, the first hinge seat is provided with a first groove, the first pin shaft is installed on the first groove, one end of the first connecting block is connected to the piston rod, and the other end extends into the first groove and is sleeved on the first pin shaft.

[0011] In some embodiments, the correction mechanism includes a second connecting block and a second pin shaft, the second hinge seat is provided with a second groove, the second pin shaft is installed on the second groove, one end of the second connecting block is connected to the cylinder body, and the other end extends into the second groove and is sleeved on the second pin shaft.

[0012] In some embodiments, the present invention further includes tapered roller bearings and cylindrical roller bearings, both of which are embedded in the gearbox and sleeved onto the main shaft. The arrangement of the tapered roller bearings and cylindrical roller bearings facilitates the bearing of radial and axial loads, thereby improving the reliability of the main shaft.

[0013] In some embodiments, the present invention further includes a sleeve block and a connecting plate, wherein the sleeve block is fixedly sleeved on the main shaft, and there are multiple connecting plates, one end of which is connected to the sleeve block, and the other end is connected to the cutter disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of the excavation mechanism of a rock pipe jacking machine according to one embodiment of the present utility model.

[0015] Figure 2 This is a cross-sectional view of a structural schematic diagram of an excavation mechanism of a rock pipe jacking machine according to one embodiment of the present invention.

[0016] Figure 3 This is a cross-sectional view of a structural schematic diagram of an excavation mechanism of a rock pipe jacking machine according to one embodiment of the present invention.

[0017] Figure 4 This is a cross-sectional view of a structural schematic diagram of a gear box of an excavation mechanism of a rock pipe jacking machine according to one embodiment of the present invention.

[0018] Figure 5 The present invention is a structural schematic diagram of a deviation correction mechanism of an excavation mechanism of a rock pipe jacking machine according to an embodiment of the present invention.

[0019] In the figure: 1. cutter head, 2. main shaft, 3. transmission mechanism, 4. gear box, 5. drive motor, 6. movable housing, 7. fixed housing, 8. correction mechanism, 9. tapered roller bearing, 10. cylindrical roller bearing, 20. sleeve block, 30. connecting plate, 31. driving roller, 32. driven pulley, 311. driving pulley, 321. driven outer pulley, 322. driven inner pulley, 3211. outer teeth, 3212. inner teeth, 81. correction cylinder, 82. first hinge seat, 83. second hinge seat, 84. first connecting block, 85. first pin, 86. second connecting block, 87. second pin, 811. cylinder body, 812. piston rod, 821. first groove, 831. second groove. DETAILED DESCRIPTION

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

[0021] refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 The utility model discloses an excavation mechanism of a rock pipe jacking machine, comprising a cutter head 1, a main shaft 2, a transmission mechanism 3, a gear box 4, a drive motor 5, a movable housing 6, a fixed housing 7 and a correction mechanism 8.

[0022] A cavity is provided in the movable housing 6 , and the gear box 4 is fixedly installed in the cavity of the movable housing 6 by bolts.

[0023] The excavation mechanism of the rock pipe jacking machine also includes a tapered roller bearing 9 and a cylindrical roller bearing 10. The outer rings of the tapered roller bearing 9 and the outer rings of the cylindrical roller bearing 10 are fixedly embedded in the gear box 4, and the inner rings of the tapered roller bearing 9 and the cylindrical roller bearing 10 are fixedly sleeved on the main shaft 2, so that the main shaft 2 is rotatably mounted on the gear box 4, and one end of the main shaft 2 extends from the gear box 4 after installation.

[0024] The excavation mechanism of the rock pipe jacking machine also includes a sleeve block 20 and a connecting plate 30. The sleeve block 20 is fixedly mounted on the end of the main shaft 2 extending from the gear box 4, so that the sleeve block 20 can rotate with the rotation of the main shaft 2. There are multiple connecting plates 30, and all of the connecting plates 30 are fixedly connected to the sleeve block 20 at one end by welding, and the other end of the connecting plate 30 is fixedly connected to the cutter head 1 by bolts, thereby connecting the cutter head 1 and the main shaft 2, and the cutter head 1 can rotate with the rotation of the main shaft 2. After installation, the cutter head 1 is exposed from the movable housing 6.

[0025] There can be multiple drive motors 5. In this embodiment, there are preferably two drive motors 5. The bodies of the two drive motors 5 are fixedly connected to the gear box 4 through a connecting block.

[0026] The transmission mechanism 3 includes a driving roller 31 and a driven roller 32. There can be multiple driving rollers 31. In this embodiment, there are preferably two driving rollers 31. The two driving rollers 31 are connected to the output shafts of the two drive motors 5 in a one-to-one correspondence via couplings, so that the drive motors 5 can drive the corresponding driving rollers 31 to rotate.

[0027] The driving roller 31 is mounted on the gear box 4 via a bearing, and a driving wheel 311 is provided on the driving roller 31 , and the driving wheel 311 is located in the gear box 4 .

[0028] The driven wheel 32 includes a driven outer wheel 321 and a driven inner wheel 322. The driven outer wheel 321 is provided with outer teeth 3211 and inner teeth 3212. The driving wheel 311 is provided with teeth. The outer teeth 3211 are meshed with the driving wheels 311 on all the driving rollers 31. The driven inner wheel 322 is also provided with teeth on its periphery. The inner teeth 3212 are meshed with the teeth of the driven inner wheel 322. The driven inner wheel 322 is fixedly mounted on the main shaft 2. After the arrangement, the driven wheel 32 is also located in the gear box 4.

[0029] There can be multiple correcting mechanisms 8. In this embodiment, there are preferably four correcting mechanisms 8, which are evenly distributed around the periphery of the central axis of the excavation mechanism of the rock jacking machine.

[0030] Each correcting mechanism 8 includes a correcting cylinder 81 , a first hinge seat 82 , a second hinge seat 83 , a first connecting block 84 , a first pin 85 , a second connecting block 86 and a second pin 87 .

[0031] The correction cylinder 81 includes a cylinder body 811 and a piston rod 812. The cylinder body 811 can be loaded with hydraulic oil. One end of the piston rod 812 is movably mounted on the cylinder body 811 through a piston, so that the piston rod 812 can be telescopically moved on the cylinder body 811.

[0032] There can also be multiple first hinge seats 82 and second hinge seats 83. In this embodiment, there are preferably four first hinge seats 82 and four second hinge seats 83.

[0033] The first hinges 82 of all the correcting mechanisms 8 are fixed to the inner wall of the cavity of the movable housing 6 via bolts. The piston rods 812 of the four correcting cylinders 81 are hingedly connected to the four first hinges 82 in a one-to-one correspondence. Specifically, the first hinges 82 are provided with a first groove 821, and a first pin 85 is fixedly mounted in the first groove 821. One end of the first connecting block 84 is fixedly connected to the other end of the piston rod 812 via screws. The other end of the first connecting block 84 extends into the first groove 821 and is rotatably mounted on the first pin 85, thereby achieving the hinged connection between the piston rod 812 and the first hinges 82.

[0034] A cavity is also defined within the fixed housing 7. The second hinges 83 of all the correcting mechanisms 8 are fixed to the inner wall of the cavity within the fixed housing 7 via bolts. The cylinder bodies 811 of the four correcting cylinders 81 are articulated one-to-one with the four second hinges 83. Specifically, the second hinges 83 are defined with a second groove 831, and a second pin 87 is fixedly mounted within the second groove 831. One end of the second connecting block 86 is screwed to the bottom of the cylinder body 811. The other end of the second connecting block 86 extends into the second groove 831 and is rotatably mounted on the second pin 87, thereby achieving the articulated connection between the cylinder body 811 and the second hinges 83.

[0035] When the excavation mechanism of the rock jacking machine is used for excavation, all the driving motors 5 can respectively drive the corresponding active rollers 31 to rotate, and the rotation of all the active rollers 31 can jointly drive the driven wheels 32 to rotate, and the rotation of the driven wheels 32 can drive the rotation of the main shaft 2. Finally, the rotation of the main shaft 2 can drive the rotation of the cutter head 1 to perform the excavation action.

[0036] The excavation mechanism of this rock jacking machine uses multiple drive motors 5 to jointly drive the main shaft 2 to rotate, and has low requirements on the power, volume and cost of a single drive motor 5. Even if a drive motor 5 fails, the construction can still be maintained for a short time, which can effectively ensure the construction efficiency.

[0037] When the cutter head 1 is subjected to a strong impact at a certain point in the excavation process, the adjacent movable shell 6 at that position can be offset relative to the fixed shell 7, and the movement of the movable shell 6 will correspondingly cause the piston rod 812 of the adjacent correction cylinder 81 to retract, thereby cushioning the impact.

[0038] And after the impact is over, under the internal pressure of the correction cylinder 81, the piston rod 812 can be reset and extended accordingly to reset the movable shell 6, so as to effectively maintain the forward direction of the cutter head 1 and ensure the accuracy of the excavation direction.

[0039] The above descriptions are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A rock pipe jacking machine excavation mechanism, characterized in that: The gearbox is mounted on a vertical cam which is secured to the upper and lower ends of the shaft and is designed to engage with the gears of the drive train, wherein the gearbox is mounted on a vertical cam which is secured to the upper and lower ends of the shaft.

2. The rock pipe jacking machine excavation mechanism according to claim 1, characterized in that: The correction mechanism includes a correction cylinder, a first hinge seat and a second hinge seat, the first hinge seat is connected to the movable shell, the second hinge seat is connected to the second shell, the correction cylinder includes a cylinder body and a piston rod, the piston rod is hinged to the first hinge seat, and the cylinder body is hinged to the second hinge seat.

3. The rock pipe jacking machine excavation mechanism according to claim 2, characterized in that: The correction mechanism includes a first connecting block and a first pin shaft. The first hinge seat is provided with a first groove. The first pin shaft is installed on the first groove. One end of the first connecting block is connected to the piston rod, and the other end extends into the first groove and is sleeved on the first pin shaft.

4. The rock pipe jacking machine excavation mechanism according to claim 2, characterized in that: The correction mechanism includes a second connecting block and a second pin shaft. The second hinge seat is provided with a second groove. The second pin shaft is installed on the second groove. One end of the second connecting block is connected to the cylinder body, and the other end extends into the second groove and is sleeved on the second pin shaft.

5. The rock pipe jacking machine excavation mechanism according to claim 1, characterized in that: It comprises a tapered roller bearing and a cylindrical roller bearing, both of which are embedded in the gear box and sleeved on the main shaft.

6. The rock pipe jacking machine excavation mechanism according to claim 1, characterized in that: It includes a sleeve block and a connecting plate. The sleeve block is fixedly sleeved on the main shaft. There are multiple connecting plates. One end of the connecting plate is connected to the sleeve block, and the other end is connected to the cutter disc.

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