A hobbing cutter barrel, a cutting cutter head and a boom-type tunneling machine

Abstract

The present application belongs to the technical field of tunneling equipment, and specifically discloses a cutter drum, a cutting cutter head and a cantilevered tunneling machine. The cutter drum comprises a drum body, the drum body is provided with a mounting position for mounting a cutter, the drum body has a rotation axis, the cutter has a rotation axis, the mounting position has an axis that is positioned and coincides with the rotation axis of the cutter, and the rotation axis of the drum body is perpendicular to the axis of the mounting position. The cutting cutter head comprises the above cutter drum. The cantilevered tunneling machine comprises the above cutting cutter head. In actual application, when the cutting cutter head swings with the cutting boom, the cutter is subjected to a lateral force, the cutter drum rotates, thereby buffering the lateral force received by the cutter head, and avoiding the collapse and fracture of the cutter.

Description

Technical Field

[0001] This invention belongs to the field of tunneling equipment technology, and in particular relates to a roller cutter barrel, a cutting disc, and a cantilever tunneling machine. Background Technology

[0002] Traditional cantilever tunneling machines use a cutting head with cutting teeth or a cutting disc with roller cutters for excavation. When operating in hard rock formations, this method is inefficient and results in rapid cutter wear. To improve the adaptability of cantilever tunneling machines in hard rock formations, existing technologies have developed oscillating cutting discs. These discs can oscillate up and down, left and right, utilizing the characteristic that the tensile strength of rock is much lower than its compressive strength to shear the rock. For example, the applicant's utility model patent with authorization announcement number CN216517999U discloses an oscillating eccentric cutting disc, which improves rock-breaking efficiency.

[0003] However, when used in high-strength hard rock formations, the roller cutter swings with the cutting disc and is subjected to a large lateral force when it needs to change direction, which can easily lead to brittle fracture and chipping. The actual failure rate is as high as 30%, requiring frequent cutter replacements, resulting in low construction efficiency and high costs. Summary of the Invention

[0004] The purpose of this invention is to provide a roller cutter barrel to solve the technical problem in the prior art where the roller cutter is prone to breakage when subjected to lateral forces during reversal and oscillation. Another purpose of this invention is to provide a cutting disc having the aforementioned roller cutter barrel and a cantilever tunneling machine having the aforementioned cutting disc.

[0005] To achieve the above objectives, the technical solution provided by this invention for the hobbing cutter barrel is as follows:

[0006] A hobbing cutter barrel includes a barrel body with a mounting position for mounting a hobbing cutter. The barrel body has a rotation axis, the hobbing cutter has a rotation axis, and the mounting position has an axis that corresponds to and coincides with the rotation axis of the hobbing cutter. The rotation axis of the barrel body and the axis of the mounting position are perpendicular to each other.

[0007] The beneficial effects are: This invention improves upon the existing hobbing cutter barrel. When the cutting disc swings from up and down (left and right) to left and right (up and down) with the cantilever, the hobbing cutter, after being subjected to lateral force, swings eccentrically with the cutter barrel to achieve the change of direction, thus buffering the lateral force on the cutter disc and preventing the hobbing cutter from chipping or breaking.

[0008] As a further improvement, the rear end of the cylinder is connected to an eccentric shaft for rotatably connecting with the cutting disc. The central axis of the eccentric shaft is the rotation axis of the cylinder, and the distance between the axis of the mounting position and the central axis of the eccentric shaft is not greater than the radius of the eccentric shaft.

[0009] The beneficial effects are: it avoids a large overturning moment between the roller cutter and the cutting disc, thus improving the stress distribution.

[0010] As a further improvement, the distance between the axis of the mounting position and the central axis of the eccentric shaft is 40%-60% of the radius of the eccentric shaft.

[0011] As a further improvement, a rolling bearing is connected to the outer periphery of the eccentric shaft.

[0012] As a further improvement, the hobbing cutter barrel also includes a mounting box, in which the rolling bearing is disposed, and the mounting box has a connecting portion for connecting the cutter head body.

[0013] The beneficial effect is that it improves assembly efficiency.

[0014] As a further improvement, a retaining ring is provided between the eccentric shaft and the rolling bearing to limit the relative sliding between the eccentric shaft and the rolling bearing.

[0015] The beneficial effect is that it improves the connection stability between the eccentric shaft and the rolling bearing.

[0016] As a further improvement, the rolling bearing is a tapered roller bearing.

[0017] As a further improvement, the cylinder is a circular cylinder.

[0018] The beneficial effects are: easier processing and reduced costs.

[0019] To achieve the above objectives, the technical solution for the cutting disc provided by this invention is as follows:

[0020] A cutting disc includes a disc body connected to a hobbing cutter cylinder. The hobbing cutter cylinder includes a cylindrical body with a mounting position for mounting the hobbing cutter. The cylindrical body has a rotation axis, and the hobbing cutter has a rotation axis. The mounting position has an axis that corresponds to and coincides with the rotation axis of the hobbing cutter. The rotation axis of the cylindrical body and the axis of the mounting position are perpendicular to each other.

[0021] The beneficial effects are: This invention improves upon the existing hobbing cutter barrel. When the cutting disc swings from up and down (left and right) to left and right (up and down) with the cantilever, the hobbing cutter, after being subjected to lateral force, swings eccentrically with the cutter barrel to achieve the change of direction, thus buffering the lateral force on the cutter disc and preventing the hobbing cutter from chipping or breaking.

[0022] As a further improvement, the rear end of the cylinder is connected to an eccentric shaft for rotatably connecting with the cutting disc. The central axis of the eccentric shaft is the rotation axis of the cylinder, and the distance between the axis of the mounting position and the central axis of the eccentric shaft is not greater than the radius of the eccentric shaft.

[0023] The beneficial effects are: it avoids a large overturning moment between the roller cutter and the cutting disc, thus improving the stress distribution.

[0024] As a further improvement, the distance between the axis of the mounting position and the central axis of the eccentric shaft is 40%-60% of the radius of the eccentric shaft.

[0025] As a further improvement, a rolling bearing is connected to the outer periphery of the eccentric shaft.

[0026] As a further improvement, the hobbing cutter barrel also includes a mounting box, in which the rolling bearing is disposed, and the mounting box has a connecting portion for connecting the cutter head body.

[0027] The beneficial effect is that it improves assembly efficiency.

[0028] As a further improvement, a retaining ring is provided between the eccentric shaft and the rolling bearing to limit the relative sliding between the eccentric shaft and the rolling bearing.

[0029] The beneficial effect is that it improves the connection stability between the eccentric shaft and the rolling bearing.

[0030] As a further improvement, the rolling bearing is a tapered roller bearing.

[0031] As a further improvement, the cylinder is a circular cylinder.

[0032] The beneficial effects are: easier processing and reduced costs.

[0033] To achieve the above objectives, the technical solution for the cantilever tunneling machine provided by this invention is as follows:

[0034] A cantilever tunneling machine includes a cutterhead, which includes a cutterhead body connected to a cutterhead cylinder. The cutterhead cylinder includes a cylindrical body with mounting positions for mounting the cutterheads. The cylindrical body has a rotation axis, and the cutterheads have rotation axes. The mounting positions have axes that correspond to and coincide with the rotation axes of the cutterheads. The rotation axis of the cylindrical body is perpendicular to the axis of the mounting positions.

[0035] The beneficial effects are: This invention improves upon the existing hobbing cutter barrel. When the cutting disc swings from up and down (left and right) to left and right (up and down) with the cantilever, the hobbing cutter, after being subjected to lateral force, swings eccentrically with the cutter barrel to achieve the change of direction, thus buffering the lateral force on the cutter disc and preventing the hobbing cutter from chipping or breaking.

[0036] As a further improvement, the rear end of the cylinder is connected to an eccentric shaft for rotatably connecting with the cutting disc. The central axis of the eccentric shaft is the rotation axis of the cylinder, and the distance between the axis of the mounting position and the central axis of the eccentric shaft is not greater than the radius of the eccentric shaft.

[0037] The beneficial effects are: it avoids a large overturning moment between the roller cutter and the cutting disc, thus improving the stress distribution.

[0038] As a further improvement, the distance between the axis of the mounting position and the central axis of the eccentric shaft is 40%-60% of the radius of the eccentric shaft.

[0039] As a further improvement, a rolling bearing is connected to the outer periphery of the eccentric shaft.

[0040] As a further improvement, the hobbing cutter barrel also includes a mounting box, in which the rolling bearing is disposed, and the mounting box has a connecting portion for connecting the cutter head body.

[0041] The beneficial effect is that it improves assembly efficiency.

[0042] As a further improvement, a retaining ring is provided between the eccentric shaft and the rolling bearing to limit the relative sliding between the eccentric shaft and the rolling bearing.

[0043] The beneficial effect is that it improves the connection stability between the eccentric shaft and the rolling bearing.

[0044] As a further improvement, the rolling bearing is a tapered roller bearing.

[0045] As a further improvement, the cylinder is a circular cylinder.

[0046] The beneficial effects are: easier processing and reduced costs. Attached Figure Description

[0047] Figure 1 These are three views of Embodiment 1 of the hobbing cutter barrel in this invention;

[0048] Figure 2 This is a cross-sectional view of the hobbing cutter barrel in Embodiment 1 of the present invention;

[0049] Figure 3 This is a schematic diagram of the deflection process of the hobbing cutter barrel in Embodiment 1 of the present invention after being subjected to a lateral force.

[0050] Explanation of reference numerals in the attached figures:

[0051] 1. Cylinder body; 11. Mounting groove; 12. Eccentric shaft; 2. Cutting disc body; 3. Mounting box; 4. End cover; 5. Screw; 6. First retaining ring; 7. Tapered roller bearing; 8. Second retaining ring. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0053] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0054] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the process or method that includes said element.

[0055] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0056] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the term "provided with" should be interpreted broadly. For example, the object "provided with" can be a part of the main body, or it can be separately arranged from the main body and connected to the main body. This connection can be a detachable connection or a non-detachable connection. Those skilled in the art can understand the specific meaning of the above terms in this invention through specific circumstances.

[0057] The present invention will be further described in detail below with reference to the embodiments.

[0058] Specific embodiment 1 of the hobbing cutter barrel provided by the present invention:

[0059] The hobbing cutter barrel provided in this embodiment is as follows: Figure 1 and Figure 2 As shown, the device includes a cylinder 1. The front end of the cylinder 1 (in the forward / backward direction of excavation) has a mounting groove 11 for installing a cutting roller. In actual application, the cutting roller is placed in the mounting groove 11 and rotates to crush and break the rock. The cutting roller has a rotation axis, and the mounting groove 11 has an axis that is aligned with the rotation axis of the cutting roller. The rear end of the cylinder 1 has an eccentric shaft 12 for rotatably connecting to the cutter head body 2. The central axis of the eccentric shaft 12 is the rotation axis of the cylinder 1. The outer circumference of the cylinder 1 is circular. The mounting groove 11 is located at the center of the cylinder 1. The axis in the mounting groove 11 used for positioning and engaging the cutting roller is in the same plane as the central axis of the cylinder 1. The central axis of the cylinder 1 is perpendicular to the central axis of the eccentric shaft 12. In actual operation, the cutting roller is rotatably installed in the mounting groove 11. Under the swinging action of the cutting arm, the cutting roller cylinder deflects to one side, such as... Figure 3 As shown in the diagram on the left, the position of the cutter barrel is shown when the cutting arm swings up and down to crush rocks under normal pressure. When the cutting arm swings left and right, the cutter is subjected to lateral force, and the barrel 1 deflects around the eccentric axis. The lateral force is buffered, and finally the radial direction of the cutter blade is parallel to the direction of the deflection lateral force, which effectively solves the problem of the cutter blade easily chipping or breaking during swinging.

[0060] To avoid a large overturning moment when the cylinder 1 swings, and to improve the force distribution between the cutter cylinder and the cutting disc body 2, the distance between the axis of the mounting groove 11 used for positioning and engaging with the hob and the central axis of the eccentric shaft 12 is not greater than the radius of the eccentric shaft 12. Preferably, the distance between the axis of the mounting position and the central axis of the eccentric shaft 12 is 40%-60% of the radius of the eccentric shaft 12.

[0061] A rolling bearing is also installed on the outer circumference of the eccentric shaft 12, which facilitates the rotation of the cylinder 1 onto the cutting disc body 2. Specifically, in this embodiment, the rolling bearing is a pair of tapered roller bearings 7 mounted face-to-face, ensuring the balance of axial forces. A second retaining ring 8 is also provided between the tapered roller bearings 7 to prevent relative axial collisions between the tapered roller bearings 7.

[0062] The tapered roller bearing 7 is placed in the mounting box 3. The mounting box 3 is provided with a limiting structure to restrict the forward and backward axial movement of the tapered roller bearing 7. Specifically, the tapered roller bearing 7 is placed in a mounting hole provided in the mounting box 3. The mounting hole is a stepped hole with a front diameter smaller than the rear diameter. The front stepped step cooperates with the outer ring stop of the circumferential roller bearing to form a limiting boss that restricts the forward movement of the tapered roller bearing. An end cover 4 is connected to the rear end of the mounting hole by screws 5. The end cover 4 is provided with a limiting boss to restrict the backward movement of the tapered roller bearing.

[0063] To further improve the connection reliability between the tapered roller bearing 7 and the eccentric shaft 12 and limit axial relative sliding between the tapered roller bearing 7 and the eccentric shaft 12, a positioning groove is also provided on the outer periphery of the eccentric shaft 12. A first retaining ring 6 is provided in the positioning groove, and the first retaining ring 6 is in contact with the rear end face of the tapered roller bearing 7.

[0064] To ensure the normal and stable operation of the tapered roller bearing 7, a sealing ring is provided between the front end of the mounting hole of the mounting box 3 and the eccentric shaft 12 to prevent debris generated by the hobbing cutter from entering the interior of the mounting box 3 and causing damage to the bearing.

[0065] During assembly, the eccentric shaft 12, sealing ring, tapered roller bearing 7, end cover 4 and mounting box 3 can be pre-installed externally, and then the mounting box 3 can be fixedly connected to the cutting disc body 2, which improves the installation efficiency.

[0066] The specific embodiment 2 of the hobbing cutter barrel provided by the present invention differs from embodiment 1 mainly in that: in embodiment 1, an eccentric shaft 12 is connected to the rear side of the barrel body 1. In this embodiment, the hobbing cutter barrel does not include an eccentric shaft, the cutting disc body is provided with a rotating shaft, the rotating shaft is provided with a connecting structure for connecting the barrel body, and the barrel body is eccentrically installed at the front end of the rotating shaft.

[0067] The specific embodiment 3 of the hobbing cutter barrel provided by the present invention differs from embodiment 1 mainly in that: in embodiment 1, the eccentric shaft 12 is equipped with a rolling bearing. In this embodiment, the eccentric shaft is not equipped with a rolling bearing, but a rolling bearing is provided in the barrel mounting hole of the cutting disc body.

[0068] The specific embodiment 4 of the hobbing cutter barrel provided by the present invention differs from embodiment 1 mainly in that: in embodiment 1, the cutter barrel is a circular cylinder, while in this embodiment, the cutter barrel is a square cylinder.

[0069] Specific embodiments of the cutting disc in this invention:

[0070] The cutting disc includes a cutting disc body 2, and the cutting disc body 2 is connected to the roller cutter cylinder described in any of the embodiments of embodiments 1 to 4, which will not be described in detail here.

[0071] Specific embodiments of the cantilever tunneling machine in this invention:

[0072] The cantilever tunneling machine includes existing technologies such as the cutting boom, drive system, and travel system, as well as the cutting disc in the above-mentioned cutting disc embodiment, which will not be described in detail here.

[0073] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hobbing cutter barrel, comprising a barrel body, the barrel body having a mounting position for mounting a hobbing cutter, the barrel body having a rotation axis, the hobbing cutter having a rotation axis, and the mounting position having an axis corresponding to and coinciding with the rotation axis of the hobbing cutter, characterized in that, The rotation axis of the cylinder is perpendicular to the axis of the mounting position. The rear end of the cylinder is connected to an eccentric shaft for rotating connection with the cutting disc. The central axis of the eccentric shaft is the rotation axis of the cylinder. The distance between the axis of the mounting position and the central axis of the eccentric shaft is not greater than the radius of the eccentric shaft, so that the cutter will swing eccentrically with the cutter cylinder after being subjected to lateral force.

2. The roller cone cutter of claim 1, wherein, The distance between the axis of the mounting position and the central axis of the eccentric shaft is 40%-60% of the radius of the eccentric shaft.

3. The roller cone cutter of claims 1 or 2, wherein, The outer circumference of the eccentric shaft is connected to a rolling bearing.

4. The roller cone cutter of claim 3, wherein, The hobbing cutter barrel also includes a mounting box, in which the rolling bearing is disposed, and the mounting box has a connecting part for connecting the cutter head body.

5. The roller cone cutter of claim 3, wherein, A retaining ring is also provided between the eccentric shaft and the rolling bearing to limit the relative sliding between the eccentric shaft and the rolling bearing.

6. The roller cone cutter of claim 3, wherein, The rolling bearing is a tapered roller bearing.

7. The roller cone cutter of claim 1, wherein, The cylinder is a circular cylinder.

8. A cutting cutterhead comprising a cutterhead body, characterised in that, The cutter head body is connected to a hob cutter cylinder, which includes a cylindrical body. The cylindrical body has a mounting position for mounting the hob cutter. The cylindrical body has a rotation axis, and the hob cutter has a rotation axis. The mounting position has an axis that corresponds to and coincides with the rotation axis of the hob cutter. The rotation axis of the cylindrical body and the axis of the mounting position are perpendicular to each other. The rear end of the cylindrical body is connected to an eccentric shaft for rotatably connecting with the cutting cutter head. The central axis of the eccentric shaft is the rotation axis of the cylindrical body. The distance between the axis of the mounting position and the central axis of the eccentric shaft is not greater than the radius of the eccentric shaft, so that the hob cutter swings eccentrically with the cutter cylinder after being subjected to lateral force.

9. The cutting head of claim 8, wherein, The distance between the axis of the mounting position and the central axis of the eccentric shaft is 40%-60% of the radius of the eccentric shaft.

10. The cutting head of claim 8 or 9, wherein, The outer circumference of the eccentric shaft is connected to a rolling bearing.

11. The cutting head of claim 10, wherein, The hobbing cutter barrel also includes a mounting box, in which the rolling bearing is disposed, and the mounting box has a connecting part for connecting the cutter head body.

12. The cutting head of claim 10, wherein, A retaining ring is also provided between the eccentric shaft and the rolling bearing to limit the relative sliding between the eccentric shaft and the rolling bearing.

13. The cutting head of claim 10, wherein, The rolling bearing is a tapered roller bearing.

14. The cutting head of claim 8, wherein, The cylinder is a circular cylinder.

15. A cantilever tunneling machine, characterized in that, Includes the cutting disc as described in any one of claims 8-14.

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