A high-efficiency hobbing cutter

Abstract

This invention provides a high-efficiency hobbing cutter, belonging to the technical field of vertical shaft hobbing cutters. The high-efficiency hobbing cutter provided by this invention includes a hobbing cutter housing, a central shaft, a cutting edge, and several jacking cutter assemblies. The central shaft is rotatably disposed within the inner cavity of the hobbing cutter housing, and mounting heads are provided at both ends of the central shaft. The cutting edge is disposed on the outer circumferential surface of the hobbing cutter housing. Several jacking cutter assemblies are disposed on the outer circumferential surface of the hobbing cutter housing. Each jacking cutter assembly includes a jacking cutter cylinder, a jacking cutter head, and a jacking assembly. The jacking cutter cylinder is disposed on the outer circumferential surface of the hobbing cutter housing. The jacking cutter head is movably disposed within the jacking cutter cylinder, with its top end extending beyond the jacking cutter cylinder and higher than the cutting edge. The jacking assembly is disposed within the jacking cutter cylinder, providing jacking force to the jacking cutter head. In use, the jacking assembly provides impact force to the rock wall, causing the rock wall to begin to break, reducing the difficulty for the subsequent cutting edge to compress and shear the rock wall, thereby reducing the cutting edge breakage rate and improving drilling efficiency.

Description

Technical Field

[0001] This invention belongs to the field of shaft hobbing technology, and more specifically, relates to a high-efficiency hobbing cutter. Background Technology

[0002] The shaft cutterhead is fixed to the edge of the cutterhead by mounting brackets. When the cutterhead rotates under the drive of the drive unit, the cutterhead moves in a circular motion along with the cutterhead. Simultaneously, the propulsion system applies an axial thrust to the cutterhead, causing the cutterhead to press against the rock wall of the shaft. During rotation, the cutterhead's cutting edge contacts the rock wall, generating compression and shearing forces. Due to the high hardness and strength of the cutterhead's cutting edge, it can cut into the rock under pressure. As the cutterhead rotates, the cutterhead continuously rolls, forming continuous grooves on the rock wall, causing the rock to break and fracture under shear and compressive stress, thus enabling the shaft excavation.

[0003] In current vertical shaft cutting cutters, the cutting edges are in direct contact with the rock during drilling. Over time, this wear can easily occur, ranging from minor repairs to the complete scrapping of the cutter. Therefore, minimizing premature wear without compromising drilling efficiency is a crucial consideration during the drilling process.

[0004] In view of this, the inventor applies for the design of a high-efficiency hobbing cutter. Summary of the Invention

[0005] The purpose of this invention is to provide a high-efficiency hobbing cutter to solve the technical problem that existing vertical shaft hobbing cutters are prone to blade wear during long-term use in the drilling process.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A high-efficiency hobbing cutter is provided, comprising a hobbing cutter housing, a central shaft, a cutting edge, and a plurality of jacking cutter assemblies; the central shaft is rotatably disposed within the inner cavity of the hobbing cutter housing, and mounting heads are provided at both ends of the central shaft for mounting on a cutterhead mounting seat; the cutting edge is disposed on the outer circumferential surface of the hobbing cutter housing for cutting the rock wall during drilling; a plurality of jacking cutter assemblies are disposed on the outer circumferential surface of the hobbing cutter housing; wherein, the jacking cutter assembly includes a jacking cutter cylinder, a jacking cutter head, and a jacking assembly; the jacking cutter cylinder is disposed on the outer circumferential surface of the hobbing cutter housing; the jacking cutter head is movably disposed within the jacking cutter cylinder, and the top end of the jacking cutter head extends beyond the jacking cutter cylinder and is higher than the cutting edge; the jacking assembly is disposed within the jacking cutter cylinder for providing jacking force to the jacking cutter head when the jacking cutter head contacts the rock wall.

[0007] In one possible implementation, based on the above technical solutions, the top-load cutter barrel is provided with a first receiving cavity and a second receiving cavity, and a partition plate is provided between the first receiving cavity and the second receiving cavity, and the partition plate is provided with a through hole.

[0008] In one possible implementation, based on the above technical solutions, the top-force assembly includes a first telescopic member, a second telescopic member, and a top-force block. The first telescopic member is disposed within the first receiving cavity, with one end abutting against the top-force cutter head and the other end abutting against the partition plate. The top-force block is disposed within the second receiving cavity, and a through groove is formed on the top-force block. The second telescopic member is disposed within the second receiving cavity, with one end abutting against the side wall of the second receiving cavity and the other end abutting against the top-force block. The top-force cutter head is rotatably provided with a top head, which abuts against the top-force block through the through hole on the partition plate and can rotate into the through groove of the top-force block.

[0009] In one possible implementation, based on the above technical solutions, the top head includes a top head seat, a torsion spring, and a top force head. The top head seat is located at the end of the top force head, and the top force head is hinged to the top head seat via a hinge shaft. The end of the top force head is hemispherical. The torsion spring is sleeved on the hinge shaft, with one end of the torsion spring abutting against the top head seat and the other end abutting against the top force head.

[0010] In one possible implementation, based on the above technical solutions, the diameter of the through groove on the top force block is smaller than the diameter of the through hole on the isolation plate, and the end face of the top force block and the through hole form a receiving position to abut against the top force head.

[0011] In one possible implementation, based on the above technical solutions, the top-force cutter barrel includes a first sleeve and a second sleeve, which are threadedly connected. The cutter housing has a top-force groove, and the second sleeve is threadedly connected to the top-force groove.

[0012] In one possible implementation, based on the above technical solutions, the first sleeve includes a top sleeve, a middle sleeve, and a bottom sleeve. The middle sleeve has a first connecting arm and a second connecting arm on its two sides, respectively. The top sleeve is mounted on the first connecting arm, and the bottom sleeve is mounted on the second connecting arm.

[0013] In one possible implementation, based on the above technical solutions, the middle cylinder is provided with a plurality of first oil injection chambers, each first oil injection chamber having a first outlet and a second outlet, the first outlet being opposite to the inner end face of the top cylinder, and the second outlet being opposite to the side face of the top force cutter head; the bottom cylinder is provided with a second oil injection chamber, the second oil injection chamber having a third outlet, the third outlet being opposite to the top force block.

[0014] In conjunction with the above technical solutions, in one possible implementation, the second receiving cavity is further provided with an air blowing assembly. The air blowing assembly includes a pusher, an air pushing sleeve, and an air cylinder. The pusher is located at the center of the bottom wall of the second sleeve, and the air cylinder is located at the center of the top force block. The end of the pusher extends into the interior of the air cylinder, and the end of the pusher is provided with two protruding rings. The air pushing sleeve is sleeved between the two protruding rings.

[0015] In one possible implementation, based on the above technical solutions, a receiving annular groove is formed on the contact surface between the top cylinder and the top force cutter head, and a sealing strip is provided in the receiving annular groove, with the sealing strip abutting against the top force cutter head.

[0016] The beneficial effects of the high-efficiency hobbing cutter provided by this invention are as follows: Compared with the prior art, the hobbing cutter housing of this invention is equipped with a force-lifting component, including a force-lifting cutter cylinder, a force-lifting cutter head, and a force-lifting assembly. The height of the force-lifting cutter head is higher than the height of the cutting edge set on the hobbing cutter housing. When the high-efficiency hobbing cutter provided by this invention is installed on the mounting base of the cutter head and drilling begins, the hobbing cutter housing begins to rotate. Because the height of the force-lifting cutter head is higher than that of the cutting edge, the force-lifting cutter head first contacts the rock wall. Under the pressure of the rock wall, the force-lifting cutter head retracts into the force-lifting assembly. In this invention, when the jacking cutter head retracts into the jacking cutter cylinder a certain distance, the jacking component applies a force to the jacking cutter head, causing it to quickly extend out of the jacking cutter cylinder and impact the rock wall. The rock wall breaks under the impact force, making it easier for the cutting edge to squeeze and shear the rock wall in subsequent processes. This invention provides a high-efficiency rolling cutter. When in use, the jacking component provides an impact force to the rock wall, causing the rock wall to break, reducing the difficulty of subsequent cutting edge squeezing and shearing of the rock wall, thereby reducing the cutting edge breakage rate and improving drilling efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is a schematic diagram of the structure of a high-efficiency hobbing cutter provided in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of a high-efficiency hobbing cutter's top-force cutter assembly provided in an embodiment of the present invention;

[0020] Figure 3 This is a cross-sectional view of a high-efficiency hobbing cutter assembly provided in an embodiment of the present invention;

[0021] Figure 4 An exploded view of a high-efficiency hobbing cutter assembly provided in an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the top head of a high-efficiency hob provided in an embodiment of the present invention;

[0023] Figure 6 for Figure 3 Enlarged view of point A in the middle.

[0024] The labels for the attached figures are as follows:

[0025] 10. Hob housing; 11. Force groove; 20. Cutting edge; 30. Central shaft; 40. Forced cutter assembly;

[0026] 41. Top-loading cutter sleeve; 411. First sleeve; 4111. Top sleeve; 41111. Receiving annular groove;

[0027] 4112. Middle cylinder; 4113. Bottom cylinder; 4114. First connecting arm; 4115. Second connecting arm;

[0028] 4116, First oil injection chamber; 41161, First outlet; 41162, Second outlet;

[0029] 4117, Second oil injection chamber; 41171, Third outlet; 412, Second sleeve; 42, Top-load cutter head;

[0030] 421. Top head; 4211. Top head seat; 4212. Torsion spring; 4213. Top head;

[0031] 43. Top-loading assembly; 431. First telescopic component; 432. Second telescopic component; 433. Top-loading block;

[0032] 4331. Through groove; 44. First receiving cavity; 45. Second receiving cavity; 46. Partition plate; 461. Through hole;

[0033] 47. Receiving position; 48. Air blowing assembly; 481. Push column; 482. Air pushing sleeve; 483. Air cylinder;

[0034] 49. Sealing strips. Detailed Implementation

[0035] To make the technical problems, technical solutions, and beneficial effects 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 described embodiments are only a part of the embodiments of this application, not all of them. The specific embodiments described herein are only used to explain the invention and are not intended to limit the invention. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] It should be further noted that the accompanying drawings and embodiments of the present invention mainly describe the concept of the present invention. Based on this concept, some specific forms and arrangements of connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, under the premise that those skilled in the art understand the concept of the present invention, they can implement the above-mentioned specific forms and arrangements in a well-known manner.

[0037] When a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0038] The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself. The terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0039] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, and the spatial relative descriptions used herein will be interpreted accordingly.

[0040] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, and "several" means one or more, unless otherwise explicitly specified.

[0041] The present invention will now describe a high-efficiency hobbing cutter.

[0042] like Figure 1 and Figure 2 As shown, the present invention provides a high-efficiency hobbing cutter, including a hobbing cutter housing 10, a central shaft 30, a cutting edge 20, and a plurality of jacking cutter assemblies 40; the central shaft 30 is rotatably disposed within the inner cavity of the hobbing cutter housing 10, and mounting heads are provided at both ends of the central shaft 30 for mounting on the cutter head mounting seat; the cutting edge 20 is disposed on the outer peripheral surface of the hobbing cutter housing 10 for cutting the rock wall during drilling; a plurality of jacking cutter assemblies 40 are disposed on the outer peripheral surface of the hobbing cutter housing 10; wherein, the jacking cutter assembly 40 includes a jacking cutter cylinder 41, a jacking cutter head 42, and a jacking assembly 43; the jacking cutter cylinder 41 is disposed on the outer peripheral surface of the hobbing cutter housing 10; the jacking cutter head 42 is movably disposed within the jacking cutter cylinder 41, and the top end of the jacking cutter head 42 extends out of the jacking cutter cylinder 41 and is higher than the cutting edge 20; the jacking assembly 43 is disposed within the jacking cutter cylinder 41 for providing jacking force to the jacking cutter head 42 when the jacking cutter head 42 contacts the rock wall.

[0043] This invention provides a high-efficiency hobbing cutter. Compared with the prior art, the hobbing cutter housing 10 of this invention is equipped with a force-lifting component 43, including a force-lifting cutter cylinder 41, a force-lifting cutter head 42, and the force-lifting component 43. The height of the force-lifting cutter head 42 is higher than the height of the cutting edge 20 provided on the hobbing cutter housing 10. When this high-efficiency hobbing cutter is installed on the cutter head mounting base and drilling begins, the hobbing cutter housing 10 starts to rotate. Since the height of the force-lifting cutter head 42 is higher than that of the cutting edge 20, the force-lifting cutter head 42 first contacts the rock wall. Under the pressure of the rock wall, the force-lifting cutter head 42 retracts into the force-lifting component. When the jacking cutter head 42 retracts into the jacking cutter cylinder 41 a certain distance, the jacking component 43 will apply a force to the jacking cutter head 42, causing it to quickly extend out of the jacking cutter cylinder 41 and impact the rock wall. The rock wall breaks under the impact force, making it easier for the cutting edge 20 to squeeze and shear the rock wall in the subsequent process. This invention provides a high-efficiency rolling cutter. When in use, the jacking component 43 will provide an impact force to the rock wall, causing the rock wall to break, reducing the difficulty of the subsequent squeezing and shearing of the rock wall by the cutting edge 20, thereby reducing the breakage rate of the cutting edge 20 and improving drilling efficiency.

[0044] like Figure 3 As shown in the embodiment of the present invention, in a specific embodiment of a high-efficiency hobbing cutter, the top-load cutter cylinder 41 is provided with a first receiving cavity 44 and a second receiving cavity 45, and a partition plate 46 is provided between the first receiving cavity 44 and the second receiving cavity 45, and a through hole 461 is provided on the partition plate 46.

[0045] like Figure 3 and Figure 4 As shown in the embodiment of the present invention, in a specific implementation of a high-efficiency hobbing cutter, the force-lifting assembly 43 includes a first telescopic member 431, a second telescopic member 432, and a force-lifting block 433. The first telescopic member 431 is disposed in the first receiving cavity 44, and one end of the first telescopic member 431 abuts against the force-lifting cutter head 42, and the other end abuts against the partition plate 46. The force-lifting block 433 is disposed in the second receiving cavity 45, and a through groove 4331 is provided on the force-lifting block 433. The second telescopic member 432 is disposed in the second receiving cavity 45, and one end of the second telescopic member 432 abuts against the side wall of the second receiving cavity 45, and the other end abuts against the force-lifting block 433. A top head 421 is rotatably provided on the force-lifting cutter head 42. The top head 421 abuts against the force-lifting block 433 through a through hole 461 on the partition plate 46, and can rotate into the through groove 4331 of the force-lifting block 433.

[0046] It should be noted that during the rotation of the cutter housing 10, the jacking cutter head 42 will come into contact with the rock wall. Under the jacking force of the rock wall, the jacking cutter head 42 will retract into the first receiving cavity 44 a certain distance, thereby compressing the first telescopic member 431. During the retraction process, the top head 421 on the jacking cutter head 42 will also continuously push the jacking block 433 through the through hole 461 on the isolation plate 46, compressing the second telescopic member 432. When the compression reaches a certain degree, the top head 421 rotates and enters the through groove 4331 of the jacking block 433. During this period, the second telescopic member 432... The retractable member 432 is not subjected to the force of the top force block 433. The second telescopic member 432 immediately releases its elastic force, pushing the top force block 433 to reset. The bottom wall of the through groove 4331 of the top force block 433 contacts the top head 421, giving the top force cutter head 42 a huge outward displacement force. At the same time, when the top force cutter head 42 moves outward, the first telescopic member 431 also releases its elastic force, giving the top force cutter head 42 another outward displacement force. Finally, under the action of the resultant force, the top force cutter head 42 breaks the rock wall. The first telescopic member 431 and the second telescopic member 432 can be selected as springs, elastic bands or elastic ropes, etc., preferably springs.

[0047] like Figure 5 As shown in the embodiment of the present invention, in a specific implementation of a high-efficiency hobbing cutter, the top head 421 includes a top head seat 4211, a torsion spring 4212, and a top head 4213. The top head seat 4211 is disposed at the end of the top head 42, and the top head 4213 is hinged to the top head seat 4211 through a hinge shaft. The end of the top head 4213 is hemispherical. The torsion spring 4212 is sleeved on the hinge shaft. One end of the torsion spring 4212 abuts against the top head seat 4211, and the other end abuts against the top head 4213.

[0048] Specifically, because one end of the torsion spring 4212 abuts against the top seat 4211 and the other end abuts against the top head 4213, the top head 4213 remains tilted under the action of the torsion spring 4212.

[0049] like Figure 3 As shown in the embodiment of the present invention, in a specific implementation of a high-efficiency hobbing cutter, the diameter of the through groove 4331 on the top force block 433 is smaller than the diameter of the through hole 461 on the isolation plate 46, and the end face of the top force block 433 and the through hole 461 form a receiving position 47 to abut against the top force head 4213.

[0050] Specifically, when the lifting head 4213 is in an inclined state, its end abuts against the end face of the lifting block 433 and the through hole 461, forming a receiving position 47. When the lifting blade head 42 begins to compress the first telescopic member 431, the lifting head 4213 mounted on the lifting blade head 42 begins to compress the lifting block 433. During the downward pressing process, because the end of the lifting head 4213 is hemispherical, the end of the lifting head 4213 will gradually detach from the receiving position 47 and eventually fall into the through groove 43 of the lifting block 433. Within 31, the second telescopic member 432 is not subjected to the force of the top force block 433. The second telescopic member 432 immediately releases its elastic force, pushing the top force block 433 to reset. The bottom wall of the through groove 4331 of the top force block 433 contacts the end of the top force cutter head 42, giving the top force cutter head 42 a huge outward displacement force. At the same time, when the top force cutter head 42 moves outward, the first telescopic member 431 will also release its elastic force, giving the top force cutter head 42 another outward displacement force. Finally, under the combined force, the top force cutter head 42 breaks the rock wall.

[0051] like Figure 3 As shown in the embodiment of the present invention, in a specific implementation of a high-efficiency hobbing cutter, the top-force cutter cylinder 41 includes a first sleeve 411 and a second sleeve 412, which are threadedly connected. The hobbing cutter housing 10 is provided with a top-force groove 11, and the second sleeve 412 is threadedly connected to the top-force groove 11.

[0052] It should be noted that when installing the top-load cutter assembly 40, a top-load groove 11 needs to be drilled on the cutter housing 10, and then a thread matching the thread on the second sleeve 412 needs to be engraved into the top-load groove 11. When it is necessary to install the top-load cutter assembly 40 into the top-load groove 11, simply insert the end of the assembled top-load cutter assembly 40 into the top-load groove 11 and turn the top-load cutter assembly 40 to make the second sleeve 412 and the top-load cutter assembly 40 threadedly connected.

[0053] like Figure 3 As shown in the embodiment of the present invention, in a specific implementation of a high-efficiency hobbing cutter, the first sleeve 411 includes a top sleeve 4111, a middle sleeve 4112 and a bottom sleeve 4113. The middle sleeve 4112 is provided with a first connecting arm 4114 and a second connecting arm 4115 on both sides. The top sleeve 4111 is mounted on the first connecting arm 4114 and the bottom sleeve 4113 is mounted on the second connecting arm 4115.

[0054] like Figure 3 and Figure 6As shown in the embodiment of the present invention, in a specific implementation of a high-efficiency hobbing cutter, the middle cylinder 4112 is provided with a plurality of first oil injection chambers 4116, each of which is provided with a first outlet 41161 and a second outlet 41162. The first outlet 41161 is opposite to the inner end face of the top cylinder 4111, and the second outlet 41162 is opposite to the side of the top force cutter head 42. The bottom cylinder 4113 is provided with a second oil injection chamber 4117, which is provided with a third outlet 41171, which is opposite to the top force block 433.

[0055] In addition, because the jacking cutter assembly 40 needs to operate for a long time during the drilling process, it is necessary to lubricate it to prevent damage in a short period of time. A first oil injection chamber 4116 is opened on the middle cylinder 4112, which connects directly to the inner end face of the top cylinder 4111 and the side of the jacking cutter head 42. By injecting lubricating oil into the first oil injection chamber 4116, the lubricating oil reaches the appropriate position, maintaining the lubrication effect at the contact points between the jacking cutter head 42 and the first sleeve 411. Furthermore, at the bottom... A second oil injection chamber 4117 is provided on the cylinder 4113. The second oil injection chamber 4117 is directly connected to the side of the top force block 433. By injecting lubricating oil into the second oil injection chamber 4117, the lubricating oil reaches the corresponding position and maintains the lubrication effect of the contact part of the top force block 433 and the second sleeve 412. After the oil injection is completed, it is necessary to tighten fasteners, such as bolts, studs and screws, into the first oil injection chamber 4116 and the second oil injection chamber 4117 to prevent dust from entering the top force knife assembly 40 and causing damage to the top force knife assembly 40.

[0056] like Figure 3 As shown in the embodiment of the present invention, in a specific implementation of a high-efficiency hobbing cutter, the second receiving cavity 45 is further provided with an air blowing assembly 48. The air blowing assembly 48 includes a pusher 481, an air pushing sleeve 482, and an air cylinder 483. The pusher 481 is located at the center of the bottom wall of the second sleeve 412, and the air cylinder 483 is located at the center of the top force block 433. The end of the pusher 481 extends into the air cylinder 483, and the end of the pusher 481 is provided with two protruding rings, with the air pushing sleeve 482 sleeved between the two protruding rings.

[0057] Specifically, by setting up the air blowing assembly 48, dust can be prevented from entering the interior of the top force knife assembly 40 from the contact surface between the top cylinder 4111 and the top force knife head 42. When the top force knife head 42 retracts into the first receiving cavity 44, the top force head 4213 at the end of the top force knife head 42 pushes the top force block 433 to move. The top force block 433 drives the air cylinder 483 to move. The air cylinder 483 moves, while the push column 481 and the air sleeve 482 provided on the push column 481 remain fixed. Therefore, when the air cylinder 483 moves, the air pusher sleeve 482 will push the gas out of the air cylinder 483 and flow out through the contact surface between the top cylinder 4111 and the top force cutter head 42, blowing away the dust that has reached or is about to reach the contact surface between the top cylinder 4111 and the top force cutter head 42, preventing the dust from accumulating here and entering the top force cutter assembly 40. Here, the air pusher sleeve 482 is made of high temperature resistant rubber material, such as silicone, EPDM rubber and fluororubber.

[0058] like Figure 3 and Figure 6 As shown in the embodiment of the present invention, in a specific embodiment of a high-efficiency hobbing cutter, a receiving annular groove 41111 is provided on the contact surface between the top cylinder 4111 and the top force cutter head 42, and a sealing strip 49 is provided in the receiving annular groove 41111, the sealing strip 49 abutting against the top force cutter head 42.

[0059] Additionally, to further prevent excessive dust accumulation at the contact surface between the top cylinder 4111 and the top-force cutter head 42, thus preventing it from entering the top-force cutter assembly 40, a receiving annular groove 41111 is specially formed on the contact surface between the top cylinder 4111 and the top-force cutter head 42, and a sealing strip 49 is embedded in the receiving annular groove 41111. Even if dust accumulates at this location, it will be blocked by the sealing strip 49. Furthermore, the sealing strip 49 and the air blowing assembly 48 can also be used together. When the air blowing assembly 48 blows air, the gas will be blown out through the contact point between the sealing strip 49 and the top-force cutter head 42, thereby blowing away the accumulated dust. If any dust falls at this location afterward, it will be blocked by the sealing strip 49 again. This process is repeated, which can prevent a large amount of dust from entering the top-force assembly 43 from this location.

[0060] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0061] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0062] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

Claims

1. A high-efficiency hobbing cutter, characterized in that, include: Hob housing (10); The central shaft (30) is rotatably disposed in the inner cavity of the hob housing (10), and the two ends of the central shaft (30) are provided with mounting heads for mounting on the mounting base of the cutter head; The cutting edge (20) is provided on the outer peripheral surface of the cutter housing (10) for cutting the rock wall during the drilling process; Several sets of top-load cutter assemblies (40) are disposed on the outer peripheral surface of the cutter housing (10); The top-load knife assembly (40) includes: A top-load cutter barrel (41) is disposed on the outer circumferential surface of the cutter housing (10); The top force cutter head (42) is movably disposed inside the top force cutter cylinder (41), and the top end of the top force cutter head (42) extends out of the top force cutter cylinder (41) and is higher than the blade (20). A force-lifting assembly (43) is disposed inside the force-lifting cutter cylinder (41) to provide a force-lifting force to the force-lifting cutter head (42) when the force-lifting cutter head (42) contacts the rock wall; The top-force cutter cylinder (41) is provided with a first receiving cavity (44) and a second receiving cavity (45), and a partition plate (46) is provided between the first receiving cavity (44) and the second receiving cavity (45), and a through hole (461) is provided on the partition plate (46). The top force assembly (43) includes a first telescopic member (431), a second telescopic member (432), and a top force block (433). The first telescopic member (431) is disposed in the first receiving cavity (44), and one end of the first telescopic member (431) abuts against the top force cutter head (42), and the other end abuts against the isolation plate (46). The top force block (433) is disposed in the second receiving cavity (45), and a through groove (4331) is provided on the top force block (433). The second telescopic member (432) is disposed in the second receiving cavity (45), and one end of the second telescopic member (432) abuts against the side wall of the second receiving cavity (45), and the other end abuts against the top force block (433); The top head (421) is rotatably provided on the top force cutter head (42). The top head (421) abuts against the top force block (433) through the through hole (461) on the isolation plate (46), and can rotate into the through groove (4331) of the top force block (433). The top head (421) includes a top head seat (4211), a torsion spring (4212), and a top head (4213). The top head seat (4211) is located at the end of the top head (42). The top head (4213) is hinged to the top head seat (4211) via a hinge shaft, and the end of the top head (4213) is hemispherical. The torsion spring (4212) is sleeved on the hinge shaft. One end of the torsion spring (4212) abuts against the top head seat (4211), and the other end abuts against the top head (4213). The diameter of the through groove (4331) on the top force block (433) is smaller than the diameter of the through hole (461) on the isolation plate (46). The end face of the top force block (433) and the through hole (461) form a receiving position (47) to abut against the top force head (4213).

2. The high-efficiency hobbing cutter as described in claim 1, characterized in that: The top-force cutter cylinder (41) includes a first sleeve (411) and a second sleeve (412), which are threadedly connected. The cutter housing (10) is provided with a top-force groove (11), and the second sleeve (412) is threadedly connected to the top-force groove (11).

3. The high-efficiency hobbing cutter as described in claim 2, characterized in that: The first sleeve (411) includes a top sleeve (4111), a middle sleeve (4112) and a bottom sleeve (4113). The middle sleeve (4112) has a first connecting arm (4114) and a second connecting arm (4115) on its two sides respectively. The top sleeve (4111) is mounted on the first connecting arm (4114) and the bottom sleeve (4113) is mounted on the second connecting arm (4115).

4. The high-efficiency hobbing cutter as described in claim 3, characterized in that: The middle cylinder (4112) is provided with a plurality of first oil injection chambers (4116), each first oil injection chamber (4116) having a first outlet (41161) and a second outlet (41162). The first outlet (41161) is opposite to the inner end face of the top cylinder (4111), and the second outlet (41162) is opposite to the side of the top force cutter head (42). The bottom cylinder (4113) is provided with a second oil injection chamber (4117), each second oil injection chamber (4117) having a third outlet (41171), which is opposite to the top force block (433).

5. A high-efficiency hobbing cutter as described in claim 2, characterized in that: The second receiving cavity (45) is also provided with an air blowing assembly (48), which includes a pusher (481), an air blowing sleeve (482) and an air cylinder (483). The pusher (481) is located at the center of the bottom wall of the second sleeve (412), and the air cylinder (483) is located at the center of the top force block (433). The end of the pusher (481) extends into the air cylinder (483), and the end of the pusher (481) is provided with two protruding rings. The air blowing sleeve (482) is sleeved between the two protruding rings.

6. A high-efficiency hobbing cutter as described in claim 3, characterized in that: The top cylinder (4111) and the top force cutter head (42) have a receiving annular groove (41111) on their contact surface. A sealing strip (49) is provided in the receiving annular groove (41111), and the sealing strip (49) abuts against the top force cutter head (42).

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