JP2016098544A - Cutter head for crushing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screw shaft direct-coupled type cutting device for excavation, the diameter of which can be set small and which can be driven with high torque.SOLUTION: A cutting device (1) for excavation includes a planetary gear reducer (2) that is connected to a screw shaft (5) of a screw conveyor (4), and a cutter head (3) that is rotatively driven at torque increased by the planetary gear reducer. The screw shaft is connected to a sun gear (9) of the planetary gear reducer, and the cutter head is connected to either a planetary gear shaft (8) or an internal tooth (11) of the planetary gear reducer.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a crushing cutter head, and more particularly to a crushing cutter head that can be driven with a large torque and can be used for burial work such as a sewer pipe.

  As a method of driving the crushing cutter head used for burial work such as sewer pipes, the cutter is driven by a hydraulic or electric motor and speed reducer installed in front of the front conduit separately from the drive device that drives the screw shaft. There are known a leading drive type and a screw shaft direct connection type in which a cutter is attached to a tip portion of a screw shaft driven by a driving device by a joint and the cutter is driven by a driving force of the screw shaft.

  In the lead drive type, since the cutter is not directly connected to the screw shaft, it is not limited by the driving force of the screw shaft, and the cutter can be rotationally driven with a large torque by the motor and the speed reducer. However, on the other hand, it is necessary to install a motor and a speed reducer in the front part of the leading conduit, making it difficult to reduce the diameter of the device, and it is also necessary to pass a hydraulic hose cable or the like in the buried pipe, which is an additional work. It has problems such as being complicated.

  Also, in the screw shaft direct connection type, since the cutter is directly connected to the screw shaft, it is necessary to increase the strength of the screw shaft and the joint in order to apply a large torque to the cutter. However, there is a limit, and it is necessary to increase the size of the drive device and the speed reducer for driving the screw conveyor.

JP 2005-1555056 A JP 2013-108232 A JP 2014-185492 A

  In the conventional direct connection type of the screw shaft, as described above, there is a problem that when the cutter is driven with a large torque, it is necessary to increase the strength of the screw shaft and the joint.

  Accordingly, an object of the present invention is to provide an excavation cutter apparatus that solves the above-described conventional problems and is of a screw shaft direct connection type that can be reduced in diameter and that can be driven with a large torque.

  To achieve the above object, an excavation cutter device according to the present invention includes a planetary gear speed reducer connected to a screw shaft of a screw conveyor, and a cutter head that is rotationally driven with a torque increased by the planetary gear speed reducer. The screw shaft is connected to a sun gear of the planetary gear reducer, and the cutter head is connected to either a planetary gear shaft or an internal tooth of the planetary gear reducer. It is characterized by.

  In addition, a blade supporting portion is provided in the blade edge portion for supporting the planetary gear shaft or the internal teeth to which the cutter head is connected, and the planetary gear shaft or the internal teeth to which the cutter head is connected is the bearing. It is connected with the bearing inner ring | wheel of a support apparatus, It is characterized by the above-mentioned.

  The cutter head may be connected to the planetary gear shaft.

  The cutter head may be connected to the internal teeth.

  Moreover, the excavated earth and sand is provided to the screw conveyor through a gear gap between the planetary gears of the planetary gear reducer.

  In addition, the screw shaft and the sun gear may be connected to each other by a polygonal shaft structure so as to be capable of rotating integrally and relatively moving back and forth.

  Further, a scraper is provided between the face plate of the cutter head and the front part of the planetary gear speed reducer for sending the excavated earth and sand to the rear side.

  Further, a scraper for sending the excavated earth and sand to the rear side is provided between the rear part of the planetary gear speed reducer and the tip part of the screw shaft.

  The water injection pipe for delivering the drilling additive is provided from the screw shaft to the front part of the cutter head.

  According to the configuration of the present invention, the screw shaft is connected to the sun gear of the planetary gear reducer, and the cutter head is connected to either the planetary gear shaft or the internal teeth of the planetary gear reducer, so that it is driven. The cutter head can be rotationally driven with a rotational torque obtained by reducing and increasing the driving force of the screw shaft by the planetary gear reducer.

  In addition, since the screw shaft is connected to the sun gear, the planetary gear speed reducer as a speed reducer is arranged rotationally symmetrically with respect to the screw shaft, and can drive the cutter head with a large torque, and can be used for the excavation cutter device. Small diameter can be achieved.

  Also, a bearing support device for supporting the planetary gear shaft or internal teeth to which the cutter head is connected is provided at the blade edge portion, and the planetary gear shaft or internal teeth to which the cutter head is connected is connected to the bearing inner ring of the bearing support device. Therefore, the cutter head can be rotated without causing a runout.

The figure which shows the outline of embodiment of this invention. The figure which shows the end surface seen from the A direction of FIG. The figure which shows the outline of other embodiment of this invention. The figure which shows the end surface seen from the A direction of FIG. The figure which shows the whole excavation apparatus with which this invention is applied, and a construction site.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 5 shows an example of an entire excavator to which the excavation cutter device 1 according to the present invention is applied and an example of a construction site. A symbol G indicates the ground surface, and a symbol 100 indicates a starting pit dug downward from the ground surface G. A propulsion device 101 is installed in the start pit 100. The screw conveyor 4 is driven by the drive motor of the propulsion unit 101 and the speed reducer 102. Further, the screw conveyor 4 is propelled and moved by the propulsion cylinder 103 and adjusted and moved by the adjuster 104 to move back and forth.

  The excavation cutter device 1 includes a planetary gear speed reducer 2 connected to a screw shaft 5 of a screw conveyor 4 and a cutter head 3 that is rotationally driven by the torque increased by the planetary gear speed reducer 2.

  FIG.1 and FIG.2 shows the cutter apparatus 1 for excavation which concerns on the 1st Embodiment of this invention. The planetary gear reduction 2 is configured such that the sun gear 7 that rotates integrally with the sun gear shaft 8 at the center and the planetary gear shaft 10 can revolve around the sun gear shaft 8 while rotating around the planetary gear shaft 10. For example, three planetary gears 9 and inner teeth 11 that are outside the planetary gears 9 and mesh with the planetary gears 9 are provided. A gear gap 12 is formed between adjacent planetary gears 9, and earth and sand excavated from the gear gap 12 are passed from the gear gap 12 to the screw conveyor 4 as will be described later.

  The sun gear shaft 8 of the sun gear 7 is formed integrally with the tip of the screw shaft 5 of the screw conveyor 4, and the tip of the screw shaft 5 constitutes the sun gear shaft 8. The tip of the sun gear shaft 8, ie, the screw shaft 5, is formed as a spline having a polygonal cross section, for example, a hexagonal shaft, and the sun gear shaft 8 is inserted into a hole 7a of the sun gear 7 formed in the same shape. Thus, the sun gear shaft 8 and the sun gear 7 can rotate integrally and can move relatively back and forth. As a result, the sun gear 7 is rotationally driven by the screw shaft 5, and the screw conveyor 4 is moved back and forth by the adjuster 104 of the propulsion device 101 to prevent clogging of the soil. For easy understanding, FIG. 1 shows an axial cross section of a hexagonal sun gear shaft 8.

  In the present embodiment, the internal teeth 11 are attached and fixed to the fixed frame 21 of the tip conduit 20. The torque obtained by increasing the rotational driving force of the screw shaft 5 by the planetary gear reducer 2 is transmitted to the cutter head 3 via the planetary gear shaft 10.

  A ring-shaped bearing support device 24 is provided at the blade edge portion 22 in front of the leading conduit 20. The bearing support device 24 includes a bearing outer ring 25 and a bearing inner ring 26 inside the bearing outer ring 25. The bearing outer ring 25 forms a part of the frame of the blade opening 22 and is integrally fixed to the inner teeth 11 fixed to the fixed frame 21 of the tip conduit 20. The bearing inner ring 26 is connected to a face plate 32 of the cutter head 3 via a flange plate 28 and a flat plate 30 described later. The bearing inner ring 26 of the bearing support device 24 is in the vicinity of the outer peripheral portion of the blade edge portion 22 and is at substantially the same radial position as the outer periphery of the face plate 32, and a plurality of flat plates 30 corresponding to the plurality of planetary gear shafts 10 are provided. The bearing support device 24 can support the cutter head 3 in a stable posture.

  A ring-shaped auxiliary bearing device 14 for rotatably supporting the planetary gear 9 is provided at the front and rear positions of the sun gear 7. The auxiliary bearing device 14 supports the planetary gear 9 so as to be rotatable with respect to the sun gear 7.

  A flange plate 28 is fixed to the front end portion of the planetary gear shaft 10, and a flange plate 29 is fixed to the rear end portion of the planetary gear shaft 10.

  The outer peripheral portion of the flange plate 28 is fixed to the bearing inner ring 26 of the bearing support device 24, and the inner peripheral portion of the flange plate 28 is fixed to the bearing outer ring 14 a of the auxiliary bearing device 14. A flange plate 28 fixed to the planetary gear shaft 10 is connected to the bearing inner ring 26 of the bearing support device 24 and the bearing outer ring 14a of the auxiliary bearing device 14 and is supported by the bearing support device 24 and the auxiliary bearing device 14. As a result, the planetary gear shaft 10 can rotate stably without causing the center deflection.

  The face plate 32 and the flange plate 28 constituting the cutter head 3 are connected by a flat plate 30. A plurality of flat plates 30 are arranged around the sun gear shaft 8 at intervals. The flat plate 30 is formed in a flat plate shape so that the flat plate 30 does not become an obstacle when delivering the soil to the screw conveyor 4, and the flat direction of the flat plate 30 is toward the center of the sun gear shaft 8. It is arranged in a spoke shape to face.

  A plurality of cutters 34, 35, 36 constituting the cutter head 3 are attached to the front side of the face plate 32. When the face plate 32 is pressed against the excavation target sediment and rotates, the cutters 34, 35, and 36 rotate around the respective rotation shafts 34a, 35a, and 36a in contact with the excavation target sediment, Sediment is excavated with a bit attached to the section. The face plate 32 is formed with a hole 32a for passing the soil excavated by the cutters 34, 35, and 36 to the rear.

  A water injection pipe 40 for sending the drilling additive is disposed inside the screw shaft 5. The water injection pipe 40 passes through the inside of the sun gear shaft 8, passes through the face plate 32, and extends to the vicinity of the cutters 34, 35, and 36. Drilling additive is supplied to the water injection pipe 40 from the start pit 100 side.

  A scraper 42 attached to the sun gear shaft 8 is provided between the face plate 32 and the flange plate 28 at the rear of the planetary gear speed reducer 2. The scraper 42 is attached with tilted blades so that the discharged soil is sent backward. When the scraper 42 is not provided, the waste discharged to the rear through the hole 32a may accumulate preferentially at the bottom of the space. However, by providing the scraper 42, the discharged soil can be efficiently transferred to the rear. it can.

  A scraper 43 attached to the screw shaft 5 is provided between the flange plate 29 at the rear of the planetary gear reducer 2 and the tip of the screw shaft 5. The earth discharged from the gear gap 12 of the planetary gear speed reducer 2 is efficiently delivered to the screw conveyor 4 by the scraper 43 and sent to the start shaft 100 by the screw conveyor 4.

Next, the operation of the excavation cutter device 1 according to the present embodiment will be described.
When the screw conveyor 4 is rotationally driven by the drive motor and the speed reducer 102, the sun gear 7 rotates with the rotation of the sun gear shaft 8 formed integrally with the screw shaft 5, and the sun gear 7 and the internal teeth 11 are rotated. The planetary gear 9 that meshes with each other rotates around the planetary gear shaft 10 and the planetary gear shaft 10 revolves around the sun gear shaft 8. Here, since the internal teeth 11 are attached and fixed to the fixed frame 21 of the leading conduit 20, the internal teeth 11 do not rotate, and the planetary gear shaft 10 is connected to the sun gear 7, the planetary gear 9, and the internal teeth 11. It rotates around the sun gear shaft 8 at a reduced rotational speed according to a known formula determined by the relationship between the number of teeth. The rotational torque of the planetary gear shaft 10 is amplified by the amount that the planetary gear shaft 10 rotates around the sun gear shaft 8 at a rotational speed that is reduced compared to the rotational speed of the sun gear shaft 8. As the planetary gear shaft 10 is rotationally driven by the rotational torque amplified by the planetary gear reducer 2, the flange plate 28, the bearing inner ring 26 of the bearing support device 24, the flat plate 30, and the face plate 32 move around the sun gear shaft 8. And the cutters 34, 35, 36 are driven to rotate with the rotational torque amplified around the sun gear shaft 8.

  According to the configuration of the present embodiment, since the rotational driving force by the screw shaft 5 is decelerated and transmitted to the planetary gear shaft 10 of the planetary gear speed reducer 2, the cutters 34, 35, and 36 are amplified with the rotational torque. It can be rotated.

  Further, since the screw shaft 5 is connected to the sun gear shaft 8 of the sun gear 7, the planetary gear speed reducer 2 as a speed reducer can be arranged rotationally symmetrically with respect to the screw shaft 5, and a large torque can be obtained. Thus, the cutter head can be driven and the diameter of the cutter apparatus for excavation can be reduced due to the rotational symmetry.

  Further, since the planetary gear shaft 7 to which the cutter head 2 is connected is supported by a bearing support device 24 provided in the blade opening portion 22 via a flat plate 32 and a flange plate 28, the cutter head 2 is simply screwed, for example. Compared with the case where the shaft 5 is connected, it is possible to rotate without causing a runout.

  In addition, the planetary gear shaft 7 to which the cutter head 2 is coupled is supported not only by the bearing support device 24 but also by the auxiliary bearing device 14, so that the planetary gear shaft 10 is stable without being swung. Can be rotated.

  Further, since the earth and sand excavated from the gear gap 12 is transferred to the screw conveyor 4 by utilizing the gear gap 12 between the planetary gears 9 of the planetary gear speed reducer 2, the earth can be efficiently discharged.

  Further, the screw shaft 5 and the sun gear shaft 8 and the sun gear 7 are connected to each other in a hexagonal polygon shaft structure so as to be able to rotate integrally and relatively move back and forth. The sun gear shaft 8 can be rotationally driven by the rotational driving force of the propeller 101 and the screw conveyor 4 can be moved back and forth with respect to the sun gear 7 by the adjuster 104 of the propulsion unit 101 to prevent clogging of the soil. It can be made easier.

  Further, since the scrapers 42 and 43 are provided between the face plate 32 and the front part of the planetary gear speed reducer 2 and between the rear part of the planetary gear speed reducer 2 and the tip end part of the screw shaft 5, the excavated earth and sand are removed. It can be efficiently delivered to the screw conveyor 4.

  Further, since the water injection pipe 40 for sending the drilling additive is disposed from the inside of the screw shaft 5 to the vicinity of the cutters 34, 35, 36 of the cutter head 3, the drilling additive is used to remove the sediment to be drilled. Drilling can be done efficiently.

  Next, another embodiment of the present invention will be described with reference to FIGS.

  In the present embodiment, unlike the previous embodiment, the internal teeth 11 are not fixed to the fixed frame 21 of the tip conduit 20, and the planetary gear shaft 10 is fixed to the fixed frame 21 or blade edge portion 22 of the tip conduit 20. It is fixed to the frame. The rotational drive torque of the screw shaft 5 increased by the planetary gear speed reducer 2 is taken out from the internal teeth 11 and transmitted to the cutter head 3.

  A ring-shaped bearing support device 24 is provided at the blade edge portion 22 in front of the leading conduit 20. The bearing support device 24 includes a bearing outer ring 25 and a bearing inner ring 26 inside the bearing outer ring 25. In the present embodiment, the bearing inner ring 26 is configured integrally with the inner teeth 11 by the inner teeth 11 themselves. ing. The bearing outer ring 25 forms a part of the frame of the blade edge portion 22 and is integrally connected to the fixed frame 21 of the tip conduit 20.

  The bearing inner ring 26, that is, the inner teeth 11 are fixed to a ring-shaped connection member 44, and the connection member 4444 is connected to the flat plate 30, and the flat plate 30 is connected to the face plate 32 of the cutter head 3. The internal teeth 11 are connected to the cutter head 3.

  The planetary gear shaft 10 is connected to a bearing outer ring 25 that forms a part of the frame of the blade portion 22 as follows. A flange plate 48 is fixed to the front end portion of the planetary gear shaft 10, and a flange plate 49 is fixed to the rear end portion of the planetary gear shaft 10. The flange plate 48 and the flange plate 49 are connected to the bearing outer ring 14 a of the auxiliary bearing device 14, and are rotatably supported by the auxiliary bearing device 14 with respect to the sun gear shaft 8. The flange plate 48 is hermetically supported with respect to the connection member 44. The flange plate 49 is fixed to the bearing outer ring 25, whereby the planetary gear shaft 10 is integrally connected to the fixed frame 21 of the tip conduit 20 or the frame of the blade edge portion 22.

Next, the operation of the excavation cutter device 1 according to the present embodiment will be described.
When the screw conveyor 4 is rotationally driven by the drive motor and the speed reducer 102, the sun gear 7 rotates with the rotation of the sun gear shaft 8 formed integrally with the screw shaft 5, and the sun gear 7 and the internal teeth 11 are rotated. The planetary gear 9 meshing with each other rotates around the planetary gear shaft 10. Since the planetary gear shaft 10 is connected to the fixed frame 21 of the leading conduit 20, it stops without revolving around the sun gear shaft 8. The internal teeth 11 that mesh with the planetary gear 9 rotate at a rotational speed reduced around the sun gear shaft 8 as the planetary gear 9 rotates. As in the case of the above-described embodiment, the reduced rotational speed is determined according to a known formula determined by the relationship between the number of teeth of the sun gear 7, the planetary gear 9, and the internal teeth 11. The rotational torque of the internal teeth 11 is amplified by the amount of rotation of the internal teeth 11 around the sun gear shaft 8 at a rotational speed that is reduced compared to the rotational speed of the sun gear shaft 8. As the inner teeth 11 are rotationally driven by the rotational torque amplified by the planetary gear speed reducer 2, the bearing inner ring 26 (inner teeth 11), the connecting member 44, the flat plate 30, and the face plate 32 of the bearing support device 24 are sun gears. The cutters 34, 35, and 36 rotate around the shaft 8 and are driven to rotate with the rotational torque amplified around the sun gear shaft 8.

  According to the configuration of the present embodiment, since the rotational driving force by the screw shaft 5 is transmitted to the internal teeth 11 of the planetary gear speed reducer 2, the cutters 34, 35, and 36 are rotationally driven with the amplified rotational torque. be able to.

  Further, since the screw shaft 5 is connected to the sun gear shaft 8 of the sun gear 7, the planetary gear speed reducer 2 as a speed reducer is disposed rotationally symmetrically with respect to the screw shaft 5 and drives the cutter head with a large torque. In addition, the diameter of the cutter device for excavation can be reduced.

  Further, the cutter head 2 is connected to a bearing inner ring 26 of a bearing support device 24 provided in the blade opening portion 22 via a flat plate 32 and a connecting member 44, and the bearing inner ring 26 is constituted by the inner teeth 11 themselves. Since the cutter head 2 is supported by the bearing support device 24 and is driven to rotate, the cutter head 2 can be rotated without causing runout as compared with the case where the cutter head 2 is simply connected to the screw shaft 5, for example. .

  Further, the internal teeth 11 to which the cutter head 2 is connected are not only supported by the bearing support device 24 but also supported by the auxiliary bearing device 14 via the flange plate 48. It can rotate stably without doing.

  Further, as in the case of the above-described embodiment, the earth and sand excavated from the gear gap 12 using the gear gap 12 between the planetary gears 9 of the planetary gear reducer 2 is passed to the screw conveyor 4. The screw shaft 5 and the sun gear shaft 8 and the sun gear 7 can be rotated integrally and can move relatively back and forth, and a hexagonal polygon shaft structure. The sun gear shaft 8 can be rotationally driven by the rotational driving force of the screw shaft 5, and the screw conveyor 4 can be moved back and forth with respect to the sun gear 7 by the adjusting device 104 of the propulsion device 101. And can easily prevent clogging of the soil. Further, since the scrapers 42 and 43 are provided between the face plate 32 and the front part of the planetary gear speed reducer 2 and between the rear part of the planetary gear speed reducer 2 and the tip end part of the screw shaft 5, the excavated earth and sand are removed. Since it can be efficiently delivered to the screw conveyor 4 and the water injection pipe 40 for sending the drilling additive is disposed from the inside of the screw shaft 5 to the vicinity of the cutters 34, 35, 36 of the cutter head 3. Using the drilling additive, it is possible to efficiently drill the sediment to be drilled.

  In this embodiment, since the bearing inner ring 26 is constituted by the inner teeth 11 themselves, the inner teeth 11 can also serve as the bearing inner ring 26. For example, the length of the device can be shortened. It is possible to simplify the apparatus configuration.

1 Cutter device for excavation 2 Planetary gear speed reducer 3 Cutter head 4 Screw conveyor 5 Screw shaft 7 Sun gear 7
7a hole 8 sun gear shaft 9 planetary gear 10 planetary gear shaft 11 internal gear 12 gear gap 14 auxiliary bearing device 20 leading conduit 21 fixed frame 22 blade opening 24 bearing support device 25 bearing outer ring 26 bearing inner rings 28 and 29 flange plate 30 flat plate 32 Face plate 34, 35, 36 Cutter 40 Water injection pipe 42, 43 Scraper 44 Connection member 48, 49 Flange plate 100 Starting shaft 101 Propulsion machine 102 Drive motor and reduction gear 103 Propulsion cylinder 104 Adjuster

Claims (9)

A planetary gear speed reducer connected to the screw shaft of the screw conveyor, and a cutter head that is rotationally driven with a torque increased by the planetary gear speed reducer,
The screw shaft is connected to a sun gear of the planetary gear reducer, and the cutter head is connected to either a planetary gear shaft or an internal tooth of the planetary gear reducer. Cutter device for excavation. The planetary gear shaft to which the cutter head is connected or a bearing support device for supporting the internal teeth is provided at a blade edge portion, and the planetary gear shaft or the internal teeth to which the cutter head is connected is the bearing support device. The excavation cutter device according to claim 1, wherein the excavation cutter device is connected to a bearing inner ring. The excavation cutter device according to any one of claims 1 to 2, wherein the cutter head is connected to the planetary gear shaft. The excavation cutter device according to claim 1, wherein the cutter head is connected to the internal teeth. The excavated cutter device according to any one of claims 1 to 4, wherein the excavated earth and sand are delivered to the screw conveyor from a gear gap between the planetary gears of the planetary gear reducer. . The said screw shaft and the said sun gear are provided with the polygonal shaft structure connected with the polygon shaft structure so that it can rotate integrally and can move back and forth relatively. The excavation cutter device according to claim 1. The scraper for sending the excavated earth and sand to the back side is provided between the face plate of the said cutter head and the front part of the said planetary gear speed reducer, It is provided with the above-mentioned. The excavation cutter device according to any one of the above. The scraper for sending the excavated earth and sand to the back side is provided between the rear part of the planetary gear speed reducer, and the tip part of the screw shaft. The excavation cutter device according to any one of the above. The drilling pipe according to any one of claims 1 to 8, further comprising: a water injection pipe for delivering a drilling additive, which is disposed from the screw shaft to a front portion of the cutter head. Cutter device.

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