Fabricated shield hob cutter

Abstract

The utility model discloses an assembly type shield hob cutter. The assembly type shield hob cutter comprises a cutter head, a cutter tooth mounting ring and a plurality of cutter teeth, the plurality of cutter teeth are sequentially arranged along the outer circumferential surface of the cutter head; the cutter tooth mounting ring is provided with a cutter disc accommodating space; the cutterhead is detachably arranged in the cutterhead accommodating space; a plurality of mounting holes are formed in the cutter tooth mounting ring, and the mounting holes are in one-to-one correspondence with the cutter teeth and are matched with the cutter teeth; one end of each cutter tooth abuts against the cutter disc, and the other end of each cutter tooth penetrates through the mounting hole and extends out of the cutter tooth mounting ring. After the cutter teeth are arranged on the outer circumference of the cutter head, the cutter teeth are positioned on the outer circumferential surface of the cutter head through the assembly between the cutter tooth mounting ring and the cutter head, so that the detachable assembly among the cutter teeth, the cutter head and the cutter tooth mounting ring is realized, and the cutter integrally forms a detachable assembly type cutter; the damaged cutter teeth are detached and replaced, the whole cutter does not need to be replaced, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hob tools, in particular to an assembled shield hob tool. Background Art

[0002] The shield hob tool is one of the main components of a shield machine and undertakes the work of rock breaking. In the shield hob tool, the cutter teeth of the tool are important working parts that directly contact the tunnel rock. Generally, the cutter teeth are composed of cemented carbide inserts and wear-resistant coatings. After a long time of rock-breaking work, the cutter teeth on the tool will show excessive wear or chipping of the cutter teeth, resulting in a reduction in the rock-breaking effect. According to statistics, wear is the main failure form of the hob, accounting for more than 80%. Therefore, timely replacement of the cutter teeth is an important measure to ensure the project progress.

[0003] In the prior art, the cutter teeth and the cutter head are of an integral structure. However, the wear degrees of the numerous cutter teeth on the tool are not completely the same, which has a great relationship with the processing quality of the cutter teeth. Therefore, based on the structure of the existing hob tool, even if only some cutter teeth are damaged, the whole tool needs to be replaced, resulting in high production costs and waste of materials.

[0004] Therefore, the prior art still needs to be improved and developed. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide an assembled shield hob tool aiming at the above defects of the prior art, aiming to solve the problem of high production costs caused by the need to replace the whole tool in the prior art.

[0006] The technical solution adopted by the utility model to solve the technical problem is as follows:

[0007] An assembled shield hob tool, which includes a cutter head, and further includes:

[0008] A plurality of cutter teeth, arranged in sequence along the outer circumferential surface of the cutter head;

[0009] A cutter tooth mounting ring, having a cutter head accommodation space; the cutter head is detachably arranged in the cutter head accommodation space;

[0010] A plurality of mounting holes are provided on the cutter tooth mounting ring, and the mounting holes correspond to and cooperate with the cutter teeth one by one; one end of the cutter tooth abuts against the cutter head, and the other end passes through the mounting hole and extends outside the cutter tooth mounting ring.

[0011] For the assembled shield hob tool, along the radial direction of the cutter head, the cross-section of the cutter tooth is a trapezoidal cross-section, and the lower bottom of the trapezoidal cross-section is close to the cutter head, and the upper bottom of the trapezoidal cross-section is located outside the cutter tooth mounting ring.

[0012] For the assembled shield hob tool, one surface of the cutter tooth that abuts against the cutter head is an arc surface, and the arc surface is matched with the outer circumferential surface of the cutter head.

[0013] For the assembled shield hob tool, the cutter tooth mounting ring includes two mounting half-rings; the two mounting half-rings are arranged mirror-symmetrically and are buckled with each other to enclose and form the cutter head accommodation space.

[0014] For the assembled shield hob tool, accommodation cavities are provided on the opposite sides of the two mounting half-rings, and a part of the cutter head is located in the accommodation cavities and abuts against the cutter teeth.

[0015] The assembled shield hob tool further includes:

[0016] A plurality of connecting pieces;

[0017] A plurality of first connecting piece assembly holes are provided on the cutter tooth mounting ring, and the first connecting piece assembly holes axially penetrate through the cutter tooth mounting ring; a plurality of second connecting piece assembly holes are provided on the cutter head, and the second connecting piece assembly holes are in one-to-one correspondence and communication with the first connecting piece assembly holes; the connecting pieces are used for detachably connecting with the first connecting piece assembly holes and the second connecting piece assembly holes respectively.

[0018] For the assembled shield hob tool, the aperture of the second connecting piece assembly hole is smaller than the aperture of the first connecting piece assembly hole.

[0019] For the assembled shield hob tool, a plurality of convex bump structures are provided on the outer surface of the cutter tooth mounting ring.

[0020] For the assembled shield hob tool, the outer surface of the convex bump structure is hemispherical.

[0021] For the assembled shield hob tool, a wear-resistant layer is provided on the outer surface of the convex bump structure and / or the outer surface of the cutter tooth.

[0022] Advantageous effects: After the cutter teeth in the present application are arranged on the outer circumference of the cutter head, through the assembly between the cutter tooth mounting ring and the cutter head, the cutter teeth are positioned on the outer circumferential surface of the cutter head, so as to realize the detachable assembly among the cutter teeth, the cutter head and the cutter tooth mounting ring, and the whole tool forms a detachable assembled tool. Therefore, in the present application, when a certain cutter tooth is damaged, the damaged cutter tooth can be removed and replaced by disassembling the cutter tooth mounting ring, without replacing the whole tool, which greatly reduces the production cost. Description of the Drawings

[0023] Figure 1It is a three-dimensional view of the assembled shield hob cutter in the present utility model;

[0024] Figure 2 It is the front view of the assembled shield hob cutter in the present utility model;

[0025] Figure 3 It is the side view of the assembled shield hob cutter in the present utility model;

[0026] Figure 4 It is the sectional view of the assembled shield hob cutter in the present utility model;

[0027] Figure 5 It is the schematic assembly structure diagram of the cutter head, the cutter tooth mounting ring and the cutter teeth in the present utility model;

[0028] Figure 6 It is the schematic structure diagram of the cutter tooth mounting ring in the present utility model;

[0029] Figure 7 It is the schematic distribution diagram of the convex structure on the cutter tooth mounting ring in the present utility model;

[0030] Figure 8 It is the schematic distribution diagram of the convex structure around the cutter teeth in the present utility model. Detailed implementation manners

[0031] The following will describe the implementation manners of the present utility model with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be understood that the preferred embodiments are only for explaining the present utility model, rather than for limiting the protection scope of the present utility model.

[0032] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present utility model in a schematic manner. Therefore, only the components related to the present utility model are shown in the diagrams, rather than being drawn according to the number, shape and size of the components in actual implementation. The type, quantity and proportion of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0033] The present utility model provides an assembled shield hob cutter, as Figure 1 , Figure 2 and Figure 3As shown, the assembled shield hob tool includes a cutter head 1, a cutter tooth mounting ring 2, and a plurality of cutter teeth 3. Specifically, the plurality of cutter teeth 3 are arranged in sequence along the outer circumferential surface of the cutter head 1. The cutter tooth mounting ring 2 has a cutter head 1 accommodation space. The cutter head 1 is detachably arranged in the cutter head 1 accommodation space. A plurality of mounting holes 4 are provided on the cutter tooth mounting ring 2, and the mounting holes 4 correspond to and cooperate with the cutter teeth 3 one by one. One end of the cutter tooth 3 abuts against the cutter head 1, and the other end passes through the mounting hole 4 and extends outside the cutter tooth mounting ring 2.

[0034] In this application, after the cutter teeth 3 are arranged on the outer circumference of the cutter head 1, through the assembly between the cutter tooth mounting ring 2 and the cutter head 1, the cutter teeth 3 are positioned on the outer circumferential surface of the cutter head 1, thereby realizing the detachable assembly among the cutter teeth 3, the cutter head 1, and the cutter tooth mounting ring 2, and making the whole tool form a detachable assembled tool. Therefore, in this application, when a certain cutter tooth 3 is damaged, the damaged cutter tooth 3 can be removed and replaced by disassembling the cutter tooth mounting ring 2, without replacing the whole tool, which greatly reduces the production cost.

[0035] In an embodiment of this application, along the radial direction of the cutter head 1, the cross-section of the cutter tooth 3 is a trapezoidal cross-section, and the lower base of the trapezoidal cross-section is close to the cutter head 1, and the upper base of the trapezoidal cross-section is outside the cutter tooth mounting ring 2.

[0036] The shape of the mounting hole 4 matches the shape of the cutter tooth 3, that is, along the radial direction of the cutter head 1, the mounting hole 4 is also trapezoidal, and the width near the mounting hole 4 gradually decreases from the center of the cutter tooth mounting ring 2 to the outside. When installing the cutter tooth 3, first arrange the cutter tooth 3 on the outer circumferential surface of the cutter head 1, then arrange the mounting hole 4 corresponding to the cutter tooth 3, and sleeved the cutter tooth mounting ring 2 onto the tool, so that the upper base of the trapezoidal cross-section passes through the mounting hole 4 from the inside to the outside until the cutter tooth mounting ring 2 fits with the cutter head 1, the cutter tooth mounting ring 2 cannot move further, and part of the cutter tooth 3 is exposed outside the mounting hole 4, and then assemble the cutter tooth mounting ring 2 and the cutter head 1, and the overall assembly of the assembled shield hob tool can be completed.

[0037] In this embodiment, the cutter tooth mounting ring 2 positions the cutter tooth 3 on the outer circumferential surface of the cutter head 1 through the mounting hole 4, and at the same time, through the cooperation between the appearance shape of the cutter tooth 3 and the mounting hole 4, when the assembled shield hob tool rotates at high speed, the cutter tooth 3 is not easily separated from the mounting hole 4.

[0038] In an embodiment of this application, the surface of the cutter tooth 3 abutting against the cutter head 1 is an arc surface, and the arc surface matches the outer circumferential surface of the cutter head 1.

[0039] Specifically, the arc surface is matched with the radian of the outer circumferential surface of the cutter head 1, so that when the cutter teeth 3 abut against the cutter head 1, the arc surface can be completely attached to the outer circumferential surface of the cutter head 1, increasing the contact area between the cutter teeth 3 and the cutter head 1, thereby improving the stability of the assembly and positioning of the cutter teeth 3 on the outer circumferential surface of the cutter.

[0040] In an embodiment of the present application, as Figure 2 and Figure 4 shown, the cutter tooth mounting ring 2 includes two mounting half rings 21; the two mounting half rings 21 are arranged in a mirror image and are buckled with each other to enclose a receiving space for the cutter head 1.

[0041] Specifically, the two mounting half rings 21 are arranged in a mirror image and can be buckled with each other; when the two mounting half rings 21 are buckled, a circular ring structure can be formed, enclosing a receiving space for the cutter head 1, thereby accommodating the cutter head 1 and being detachably connected to the cutter head 1.

[0042] In this embodiment, the cutter tooth mounting ring 2 is not an integral structure, but a detachable structure composed of two separate mounting half rings 21, which is more conducive to the disassembly and installation between the cutter tooth mounting ring 2 and the cutter head 1, thereby improving the disassembly and assembly efficiency of the assembled shield hob cutter.

[0043] In an embodiment of this embodiment, receiving cavities 41 are provided on the opposite sides of the two mounting half rings 21 (as Figure 6 shown), and a part of the cutter head 1 is located in the receiving cavity 41 and abuts against the cutter teeth 3.

[0044] After the two mounting half rings 21 are buckled, the two receiving cavities 41 communicate correspondingly and form a circular ring structure, so as to be buckled on the cutter head 1 from the outer circumferential surface of the cutter head 1. Both end faces of the cutter head 1 in the axial direction are attached to the inner walls of the receiving cavities 41, thereby increasing the contact area between the cutter head 1 and the cutter tooth mounting ring 2, further improving the stability of the assembly between the cutter tooth mounting ring 2 and the cutter head 1, and further improving the stability of the positioning of the cutter teeth 3 around the cutter head 1.

[0045] At the same time, the provision of the receiving cavity 41 enables a part of the surface of the cutter head 1 to be blocked by the cutter tooth mounting ring 2, reducing the exposed area of the cutter head 1, thereby reducing the area of the cutter head 1 worn by debris.

[0046] The assembled shield hob cutter further includes a plurality of connecting members; as Figure 5 and Figure 6As shown, a plurality of first connector assembly holes 5 are provided on the cutter tooth mounting ring 2, and the first connector assembly holes 5 penetrate through the cutter tooth mounting ring 2 along the axial direction; a plurality of second connector assembly holes 6 are provided on the cutter disc 1, and the second connector assembly holes 6 communicate with the first connector assembly holes 5 in a one-to-one correspondence; the connector is used for detachably connecting with the first connector assembly holes 5 and the second connector assembly holes 6 respectively; the accommodating cavity 41 communicates with the mounting hole 4 and the first connector assembly hole 5 respectively.

[0047] Specifically, after the cutter tooth mounting ring 2 is buckled on the cutter disc 1, the first connector assembly holes 5 and the second connector assembly holes 6 correspond to each other and communicate with each other; then, the connector can pass through the first connector assembly holes 5 and the second connector assembly holes 6 respectively, so as to detachably connect the cutter tooth mounting ring 2 and the cutter disc 1.

[0048] In an embodiment of the present application, as Figure 5 shown, the aperture of the second connector assembly hole 6 is smaller than the aperture of the first connector assembly hole 5.

[0049] Specifically, the connection between the connector and the first connector assembly hole 5 and the second connector assembly hole 6 is a threaded connection, so as to realize detachable assembly. The connector includes a screw rod and two nuts, and the two nuts are distributed at both ends of the screw rod and are threadedly connected with the screw rod. The diameter of the screw rod is smaller than the diameter of the nut, so when the connector is assembled with the first connector assembly hole 5 and the second connector assembly hole 6, the screw rod is located in the second connector assembly hole 6, and the nut is located in the first connector assembly hole 5. The aperture of the second connector assembly hole 6 is smaller than the aperture of the first connector assembly hole 5, so that a part of the nut can be hidden by the first connector assembly hole 5, reducing the area of the nut exposed on the surface of the cutter tooth mounting ring 2, thereby reducing the probability of the connector being worn by debris.

[0050] In an embodiment of the present application, as Figure 7 and Figure 8 shown, a plurality of convex bump structures 7 are provided on the outer surface of the cutter tooth mounting ring 2, and the outer surface of the convex bump structure 7 is hemispherical, so that the convex bump structure 7 is a bionic convex bump structure imitating the convex bump on the head shell of a dung beetle.

[0051] In nature, dung beetles travel through the soil all year round. The hemispherical convex microstructure on the surface of their heads enables them to greatly reduce the resistance when traveling through the soil, and the soil will not adhere to the body surface of the dung beetles. It can be seen that this microstructure has extremely effective effects in wear resistance, drag reduction, and resistance to mud and water adhesion. Therefore, in this embodiment, the convex structure 7 is provided on the outer surface of the cutter tooth mounting ring 2. By using the principle of bionics, the mud and water adhesion resistance of the cutter tooth mounting ring 2 is improved, thereby improving the production efficiency.

[0052] On the surface of the cutter tooth mounting ring 2, layer-by-layer scanning processing is carried out by means of femtosecond laser. By changing the laser power, scanning speed, scanning times, number of pulses, and scanning spacing, the surface processing of the convex structure 7 is realized.

[0053] In one embodiment of the present application, as Figure 7 and Figure 8 shown, a wear-resistant layer 8 is provided on the outer surface of the convex structure 7 and / or the outer surface of the cutter tooth 3.

[0054] Specifically, the height of the convex structure 7 protruding from the outer surface of the cutter tooth mounting ring 2 is equal to the radius of the convex structure 7; the diameter of the convex structure 7 is 2 to 6 times the thickness of the wear-resistant layer 8.

[0055] In one embodiment of this embodiment, the diameter of the convex structure 7 is 5 mm to 30 mm; preferably, the diameter of the convex structure 7 is 10 mm, and the thickness of the wear-resistant layer 8 is 3 mm to 5 mm.

[0056] In one embodiment of this embodiment, the wear-resistant layer 8 is provided on the outer surfaces of both the cutter tooth 3 and the cutter tooth mounting ring 2, and the wear-resistant layer 8 is made of a high-strength alloy material. Specifically, an alloy wear-resistant coating is hot-melted on the surfaces of the cutter tooth 3 and the cutter tooth mounting ring 2, and laser cladding is used to form a tungsten carbide-reinforced nickel-based composite coating on the surfaces of the cutter tooth 3 and the cutter tooth mounting ring 2 to be used as the wear-resistant layer 8.

[0057] In one embodiment of the present application, when the two mounting half-rings 21 are buckled, a plurality of first connector assembly holes 5 on the two mounting half-rings 21 are annularly distributed. Taking the ring formed by the plurality of first connector assembly holes 5 as the first ring and the ring formed by the plurality of mounting holes 4 as the second ring as an example, the first ring is located between the center of the cutter head 1 and the second ring, so that there is a gap between the first connector assembly hole 5 and the cutter tooth 3 to ensure that the assembly between the connector and the cutter tooth mounting ring 2 will not cause adverse interference to the installation of the cutter tooth 3.

[0058] In an embodiment of the present embodiment, a frustum-shaped inclined surface 9 is further provided on the cutter tooth mounting ring 2. The frustum-shaped inclined surface 9 is coaxially arranged with the cutter head 1, and the small-diameter end of the frustum-shaped inclined surface 9 is close to the first ring, and the large-diameter end of the frustum-shaped inclined surface 9 is close to the second ring.

[0059] In this embodiment, the provision of the frustum-shaped inclined surface 9 reduces the area of the cutter tooth mounting ring 2 arranged along the outer circumferential direction, thereby reducing the area of the cutter tooth mounting ring 2 directly worn by debris and extending the service life of the cutter tooth mounting ring 2. The convex structure 7 is also provided on the frustum-shaped inclined surface 9.

[0060] A driving rotating shaft 10 is further provided at the center of the cutter head 1. The driving rotating shaft 10 is used to connect with an external driving device to drive the overall rotation of the assembled shield hob tool.

[0061] In summary, the present application provides an assembled shield hob tool, which includes a cutter head, a cutter tooth mounting ring and a plurality of cutter teeth; specifically, the plurality of cutter teeth are sequentially arranged along the outer circumferential surface of the cutter head; the cutter tooth mounting ring has a cutter head accommodating space; the cutter head is detachably arranged in the cutter head accommodating space; a plurality of mounting holes are provided on the cutter tooth mounting ring, and the mounting holes correspond to and cooperate with the cutter teeth one by one; one end of the cutter tooth abuts against the cutter head, and the other end passes through the mounting hole and extends outside the cutter tooth mounting ring. After the cutter teeth are arranged on the outer circumference of the cutter head in the present application, through the assembly between the cutter tooth mounting ring and the cutter head, the cutter teeth are positioned on the outer circumferential surface of the cutter head, so as to realize the detachable assembly among the cutter teeth, the cutter head and the cutter tooth mounting ring, and make the whole tool form a detachable assembled tool. Therefore, in the present application, when a certain cutter tooth is damaged, the damaged cutter tooth can be removed and replaced by disassembling the cutter tooth mounting ring, without replacing the whole tool, which greatly reduces the production cost.

[0062] It should be understood that the application of the present invention is not limited to the above examples. For those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present invention.

Claims

1. An assembled shield hob cutter, comprising a cutter disc, characterized in that: It also includes: A plurality of blade teeth are arranged in sequence along the outer circumference of the blade disc; The cutter tooth mounting ring has a cutter disc accommodating space; the cutter disc is detachably arranged in the cutter disc accommodating space; The cutter tooth mounting ring is provided with a plurality of mounting holes, which correspond to and cooperate with the cutter teeth one by one; one end of the cutter tooth abuts against the cutter disc, and the other end passes through the mounting hole and extends to the outside of the cutter tooth mounting ring.

2. The assembled shield hob cutter according to claim 1, characterized in that: Along the radial direction of the cutter disc, the cross section of the cutter tooth is a trapezoidal cross section, and the lower base of the trapezoidal cross section is close to the cutter disc, and the upper base of the trapezoidal cross section is located outside the cutter tooth mounting ring.

3. The assembled shield hob cutter according to claim 1, characterized in that: The side of the blade teeth that abuts against the blade disc is an arc-shaped surface, and the arc-shaped surface matches the outer circumferential surface of the blade disc.

4. The assembled shield hob cutter according to claim 1, characterized in that: The cutter tooth mounting ring includes two mounting half rings; the two mounting half rings are arranged in a mirror image and interlocked with each other to enclose and form the cutter disc accommodating space.

5. The assembled shield hob cutter according to claim 4 is characterized in that: The opposite sides of the two mounting half rings are each provided with an accommodating cavity, a part of the cutter disc is located in the accommodating cavity and abuts against the cutter teeth.

6. The assembled shield hob cutter according to claim 1, characterized in that: It also includes: Multiple connectors; The cutter tooth mounting ring is provided with a plurality of first connecting member assembly holes, and the first connecting member assembly holes penetrate the cutter tooth mounting ring axially; the cutter disc is provided with a plurality of second connecting member assembly holes, and the second connecting member assembly holes are connected with the first connecting member assembly holes one by one; the connecting member is used for detachably connecting with the first connecting member assembly hole and the second connecting member assembly hole respectively.

7. The assembled shield hob cutter according to claim 6, characterized in that: The diameter of the second connecting member assembly hole is smaller than the diameter of the first connecting member assembly hole.

8. The assembled shield hob cutter according to claim 1, characterized in that: The outer surface of the knife tooth mounting ring is provided with a plurality of convex hull structures.

9. The assembled shield hob cutter according to claim 8, characterized in that: The outer surface of the convex hull structure is hemispherical.

10. The assembled shield hob cutter according to claim 8, characterized in that: The outer surface of the convex structure and / or the outer surface of the blade teeth is provided with a wear-resistant layer.

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