Hob of shield tunneling machine

Abstract

The utility model relates to the technical field of shield tunneling machines, in particular to a shield tunneling machine hob which comprises a hob body, a locking hob body and a hob ring, the hob ring is arranged in the middle of the hob body in a sleeved mode, and a hob body step matched with the locking hob body is arranged on the outer side of the hob body. The locking cutter body is arranged on the cutter body in a sleeving mode and located at the position of the cutter body step, and the locking cutter body is detachably connected with the cutter body. A first cutter ring step is arranged on the outer side of the cutter body, a second cutter ring step corresponding to the first cutter ring step is arranged on the outer side of the locking cutter body, and the cutter ring is arranged on the first cutter ring step and the second cutter ring step in a sleeving mode. The cutter ring is assembled to the cutter body in a clearance fit mode, and the cutter ring is clamped and fixed, so that the cutter ring is convenient to disassemble and assemble; meanwhile, compared with a hob ring in the prior art, the hob ring with the same outer diameter is lighter in weight, and resource waste is reduced after the hob ring is abraded and detached.

Description

Technical Field

[0001] The utility model relates to the technical field of shield machines, and particularly relates to a cutter head for a shield machine. Background Art

[0002] During the tunneling process, the shield machine mainly relies on the cutter head ring of the cutter head to roll and press the rock, and form grooves on the working face, and finally make the rock spall. The failure forms of the cutter head are normal wear and abnormal failure. In the actual use process of the cutter head, it is found that the normal wear of the cutter head accounts for a relatively large proportion compared with the abnormal failure of the cutter head. The normal wear of the cutter head is manifested as the normal wear of the cutter head ring. In most cases, only the cutter head ring needs to be replaced.

[0003] In order to ensure the stability and safety of the cutter head ring under high-speed rotation and heavy load, the cutter head ring of the cutter head is usually interference-fitted with the cutter hub. When the cutter head ring needs to be replaced due to normal wear, the retaining ring is usually removed by carbon arc air gouging method. However, this method will damage the surface of the cutter hub and cut the cutter hub. Then, the coil of the induction heating device is sleeved outside the cutter head ring, the induction heating temperature is set and maintained for a period of time, and then the cutter head ring is dropped by hitting with a hammer and tools to complete the disassembly work of the cutter head ring; for the installation of the cutter head ring, first, the cutter head ring needs to be placed in an electric oven, the heating temperature is set and kept warm for a period of time, and then the cutter head ring is taken out by wearing heat-insulating gloves and sleeved on the cutter hub. Finally, the corresponding retaining ring tooling is used to assist in installing the welded retaining ring into the retaining ring groove on the cutter hub. In the prior art, due to the interference fit between the cutter head ring and the cutter hub, there is a disadvantage that it is difficult to disassemble and assemble the cutter head ring of the cutter head. The whole process of disassembling and assembling the cutter head ring is time-consuming and laborious, and frequent disassembly and assembly of the cutter head ring easily lead to damage to the cutter head ring and the cutter hub, affecting the service life and construction efficiency of the cutter head; at the same time, due to the heavy weight of the cutter head ring in the prior art, the length of the annular base body of the cutter head ring is much larger than the length of its trapezoidal contact part. After the cutter head ring is worn and replaced, only a small part of the cutter head ring is worn, and most of the cutter head rings are still not fully utilized. The cutter head rings are recycled as waste products, and the unutilized cutter head rings cause waste of resources. Summary of the Invention

[0004] The utility model provides a cutter head for a shield machine to solve the problems in the prior art that it is difficult to disassemble and assemble the cutter head ring after the cutter head ring of the cutter head is worn, and the worn and disassembled cutter head rings cause waste of resources. The cutter head assembles the cutter head ring to the cutter body by means of clearance fit, and clamps and fixes the cutter head ring, so as to facilitate the disassembly and installation of the cutter head ring; at the same time, for the cutter head rings with the same outer diameter, the cutter head rings are lighter in weight than the cutter head rings in the prior art, and the worn and disassembled cutter head rings reduce the waste of resources.

[0005] To achieve the above object, the technical solution of the present utility model is: a hob for a shield machine, comprising a cutter body, a locking cutter body and a cutter ring. The cutter ring is sleeved in the middle of the cutter body. A cutter body step matching the locking cutter body is arranged on the outer side of the cutter body. The locking cutter body is sleeved on the cutter body and located at the position of the cutter body step. The locking cutter body is detachably connected to the cutter body. The cutter body step plays a role in assembling the locking cutter body, so as to facilitate the assembly of the locking cutter body onto the cutter body. Through the cooperation of the locking cutter body and the cutter body, the purpose of clamping and fixing the cutter ring is achieved.

[0006] A cutter ring step one is opened on the outer side of the cutter body, and a cutter ring step two corresponding to the cutter ring step one is opened on the outer side of the locking cutter body. The cutter ring is sleeved on the cutter ring step one and the cutter ring step two. The cutter ring step one and the cutter ring step two provide an installation position for the cutter ring, so as to facilitate clamping and fixing the cutter ring under the action of the locking cutter body and the cutter body, thereby achieving the effect of facilitating the disassembly and assembly of the cutter ring.

[0007] Further, the cross-section of the contact part of the cutter ring is in an isosceles trapezoid structure, the cross-section of the annular base body of the cutter ring is in a square structure, and the bottom length of the contact part of the cutter ring is the same as the length of the annular base body. The purpose is to make the cutter ring under the same outer diameter lighter than the existing hob cutter ring, achieving the effect of reducing resource waste after the cutter ring is worn and disassembled.

[0008] Further, the locking cutter body and the cutter body are in clearance fit, and the cutter ring and the locking cutter body and the cutter body are in clearance fit. The purpose is to facilitate the disassembly and assembly of the locking cutter body and the cutter ring.

[0009] Further, the space between the cutter ring step one and the cutter ring step two forms a cutter ring groove. The annular base body of the cutter ring is located inside the cutter ring groove. The cutter ring is clamped and fixed in the cutter ring groove by the locking cutter body and the cutter body.

[0010] Further, a plurality of threaded holes two are annularly arranged on the side of the locking cutter body close to the cutter body, and a plurality of sinking grooves corresponding to the threaded holes two are annularly arranged on the side of the cutter body away from the locking cutter body. Threaded holes one corresponding to the threaded holes two are opened in the sinking grooves.

[0011] Further, bolts are arranged in the corresponding threaded holes one and threaded holes two. The bolts are threadedly connected to the cutter body and the locking cutter body. The cutter body and the locking cutter body are detachably connected by the bolts. The cutter ring relies on the bolts to connect the cutter body and the locking cutter body, so that the cutter body and the locking cutter body clamp the cutter ring to realize the axial fixation of the cutter ring.

[0012] Furthermore, the diameter of the sinking groove is larger than that of the first threaded hole, and the depth of the sinking groove is greater than the thickness of the bolt head, so that the head of the bolt can be completely embedded in the sinking groove.

[0013] By the above technical solution, the beneficial effects of the present utility model are as follows:

[0014] The structure of the present utility model is reasonable, with good use effect and low cost. The cutter ring is assembled on the cutter body by means of clearance fit and clamped and fixed, achieving the effect of facilitating the disassembly and assembly of the cutter ring, avoiding the phenomenon of damage to the cutter ring and cutter hub due to frequent disassembly and assembly of the cutter ring, prolonging the service life of the hob, and improving the maintenance efficiency and construction efficiency of the hob; at the same time, for the cutter ring with the same outer diameter, the cutter ring is lighter in weight than the existing hob cutter ring, and the worn and disassembled cutter ring reduces the waste of resources and lowers the cost of using the cutter ring.

[0015] The present utility model has a clearance fit between the locking cutter body and the cutter body, and a clearance fit between the cutter ring and the locking cutter body and the cutter body. By using the clearance fit method, the cutter ring is more easily installed on the cutter body, simplifying the replacement process of the cutter ring, saving time and effort, and reducing the labor intensity of maintenance personnel.

[0016] The present utility model connects the cutter body and the locking body with bolts to clamp and fix the cutter ring between the cutter body and the locking cutter body, realizing the axial fixation of the cutter ring and ensuring the stability of the cutter ring on the cutter body. The cutter ring relies on the frictional force between the two end faces of the cutter ring and the cutter body and the locking body to achieve axial fixation of the cutter ring, solving the problem of difficult disassembly of the cutter ring caused by traditional welded retaining rings and improving the maintenance efficiency of the hob.

[0017] By making the bottom length of the contact part of the cutter ring the same as the length of the annular base body, the cutter ring with the same outer diameter is lighter in weight and lower in cost than the existing hob cutter ring, achieving the effect of reducing resource waste after the cutter ring is worn and disassembled and lowering the cost of using the cutter ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural view of a shield machine hob of the present utility model Figure 1 ;

[0019] Figure 2 is a schematic structural view of a shield machine hob of the present utility model Figure 2 ;

[0020] Figure 3 is a schematic structural view of a shield machine hob of the present utility model Figure 3 (excluding the cutter ring);

[0021] Figure 4 is a schematic structural view of a shield machine hob of the present utility modelFigure 4 (excluding the locking tool body and the tool ring).

[0022] In the attached drawings, the reference numerals are: 1 is the tool body main body, 101 is the sinking groove, 102 is the first threaded hole, 103 is the first tool ring step, 104 is the tool body step, 2 is the locking tool body, 201 is the second tool ring step, 3 is the bolt, 4 is the tool ring groove, and 5 is the tool ring. Specific implementation mode

[0023] The following further describes the present utility model in conjunction with the attached drawings and specific implementation modes:

[0024] As Figures 1 to 4 shown, a shield machine hob includes a tool body main body 1, a locking tool body 2, and a tool ring 5. The tool ring 5 is sleeved in the middle of the tool body main body 1. A tool body step 104 matching the locking tool body 2 is arranged on the outer side of the tool body main body 1. The locking tool body 2 is sleeved on the tool body main body 1 and is located at the position of the tool body step 104. The locking tool body 2 is detachably connected to the tool body main body 1. In this embodiment, the tool body step 104 provides a position for the locking tool body 2 to be assembled on the tool body main body 1. The purpose of the detachable connection between the locking tool body 2 and the tool body main body 1 is to facilitate the disassembly and assembly of the locking tool body 2, and thus achieve the effect of facilitating the disassembly and assembly of the tool ring 5.

[0025] A first tool ring step 103 is arranged on the outer side of the tool body main body 1. A second tool ring step 201 corresponding to the first tool ring step 103 is arranged on the outer side of the locking tool body 2. The tool ring 5 is sleeved on the first tool ring step 103 and the second tool ring step 201. In this embodiment, the first tool ring step 103 and the second tool ring step 201 provide an installation position for the tool ring 5, so as to clamp and fix the tool ring 5 through the locking tool body 2 and the tool body main body 1, thereby achieving the effect of facilitating the disassembly and assembly of the tool ring 5.

[0026] The cross-section of the contact part of the tool ring 5 is in an isosceles trapezoid structure, the cross-section of the annular base body of the tool ring 5 is in a square structure, and the bottom length of the contact part of the tool ring 5 is the same as the length of the annular base body, so that the tool ring 5 with the same outer diameter is lighter in weight and lower in cost than the existing hob tool ring.

[0027] The locking tool body 2 is in clearance fit with the tool body main body 1, and the tool ring 5 is in clearance fit with the locking tool body 2 and the tool body main body 1. In this embodiment, after the locking tool body 2 is sleeved on the tool body main body 1, there is a gap between the left end face of the locking tool body 2 and the left end face of the tool body main body 1. The purpose is to facilitate the disassembly and assembly of the locking tool body 2, and thus achieve the effect of facilitating the disassembly and assembly of the tool ring 5.

[0028] The space between the first cutter ring step 103 and the second cutter ring step 201 forms a cutter ring groove 4, and the annular base body of the cutter ring 5 is located inside the cutter ring groove 4. In this embodiment, the annular base body of the cutter ring 5 is assembled with a clearance at the first cutter ring step 103 and the cutter ring step 201, and the cutter ring 5 is clamped and fixed in the cutter ring groove 4 through the cooperation of the cutter body main body 1 and the locking cutter body 2.

[0029] On one side of the locking cutter body 2 close to the cutter body main body 1, a plurality of second threaded holes are annularly arranged. On one side of the cutter body main body 1 away from the locking cutter body 2, a plurality of sinking grooves 101 corresponding to the second threaded holes are annularly arranged, and a first threaded hole 102 corresponding to the second threaded hole is opened in the sinking groove 101. In this embodiment, the number of the second threaded holes on the locking cutter body 2 is eight, and the angle between two adjacent second threaded holes is 45 degrees. Among them, the number of the sinking grooves 101 is also eight. The second threaded hole and the first threaded hole 102 are used for installing bolts 3, and the sinking groove 101 facilitates the bolt 3 to pass through the first threaded hole 101 and be threadedly connected with the locking cutter body 2.

[0030] Bolts 3 are arranged in the corresponding first threaded holes 102 and second threaded holes. The bolts 3 are threadedly connected with the cutter body main body 1 and the locking cutter body 2, and the cutter body main body 1 and the locking cutter body 2 are detachably connected through the bolts 3. In this embodiment, the number of the bolts 3 is also eight. After the cutter ring 5 is assembled on the first cutter ring step 103 and the second cutter ring step 201, the bolts 3 are sequentially passed through the sinking groove 101, the first threaded hole 102 and the second threaded hole, and the cutter body main body 1 and the locking cutter body 2 are connected by the bolts 3 to clamp and fix the cutter ring 5. The cutter ring 5 relies on the frictional force between the two end faces of the cutter ring 5 and the cutter body main body 1 and the locking body 2 to realize the axial fixation of the cutter ring 5.

[0031] The diameter of the sinking groove 101 is larger than the diameter of the first threaded hole 102, and the depth of the sinking groove 101 is greater than the thickness of the head of the bolt 3, ensuring that the bolt 3 can pass through the first threaded hole 102 and the second threaded hole, and enabling the head of the bolt 3 to be completely embedded in the sinking groove 101 to avoid the bolt 3 affecting the hob during the operation of the hob.

[0032] When the cutter ring 5 in the present utility model needs to be replaced when it is worn to a certain extent, first, the eight bolts 3 connecting the cutter body main body 1 and the locking cutter body 2 are disassembled, that is, the bolts 3 are rotated and the bolts 3 are screwed out from the second threaded holes of the locking cutter body 2 and the first threaded holes 102 of the cutter body main body 1. After the eight bolts 3 are all disassembled, then the locking body 2 is disengaged from the cutter body main body 1, and finally the cutter ring 5 is disengaged from the first cutter ring step 103 of the cutter body main body 1 to complete the disassembly work of the cutter ring 5.

[0033] After the worn cutter ring 5 is disassembled, a new cutter ring 5 is assembled onto the cutter body main body 1. First, the cutter ring 5 is sleeved on the cutter ring step 103 of the cutter body main body 1, and then the locking cutter body 2 is sleeved at the cutter body step 104 of the cutter body main body 1, and the right end face of the locking cutter body 2 is in clearance fit with the left end face of the cutter body main body 1. The cutter ring 5 is located on the cutter ring step 201 of the locking cutter body 2. At the same time, the locking cutter body 2 is rotated to make the second threaded hole on the locking cutter body 2 correspond to the first threaded hole 102 on the cutter body main body 1. Then, eight bolts 3 are respectively screwed into the first threaded hole 102 and the second threaded hole, and the locking cutter body 2 and the cutter body main body 1 are connected by the bolts 3 to fix the locking cutter body 2 on the cutter body main body 1. The locking cutter body 2 and the cutter body main body 1 clamp and fix the cutter ring 5, and the assembly work of the cutter ring 5 is completed.

[0034] The above-described embodiments are only the preferred embodiments of the utility model and do not limit the scope of implementation of the utility model. Therefore, any equivalent changes or modifications made to the technical solutions described in the scope of the utility model patent shall be included in the scope of the utility model patent application.

Claims

1. A shield machine cutter, characterized in that: The invention comprises a blade body (1), a locking blade body (2) and a blade ring (5); the blade ring (5) is sleeved on the middle part of the blade body (1); a blade step (104) matching the locking blade body (2) is arranged on the outer side of the blade body (1); the locking blade body (2) is sleeved on the blade body (1) and located at the position of the blade step (104); the locking blade body (2) is detachably connected to the blade body (1); The outer side of the knife body (1) is provided with a knife ring step 1 (103), the outer side of the locking knife body (2) is provided with a knife ring step 2 (201) corresponding to the knife ring step 1 (103), and the knife ring (5) is sleeved on the knife ring step 1 (103) and the knife ring step 2 (201).

2. A shield machine cutter according to claim 1, characterized in that: The cross section of the contact portion of the knife ring (5) is an isosceles trapezoidal structure, the cross section of the annular base of the knife ring (5) is a square structure, and the bottom length of the contact portion of the knife ring (5) is the same as the length of the annular base.

3. The shield machine cutter according to claim 1, characterized in that: The locking blade (2) and the blade body (1) are clearance-matched, and the blade ring (5) and the locking blade (2) and the blade body (1) are clearance-matched.

4. The shield machine cutter according to claim 2, characterized in that: The space between the first knife ring step (103) and the second knife ring step (201) forms a knife ring groove (4), and the annular base of the knife ring (5) is located inside the knife ring groove (4).

5. The shield machine cutter according to claim 1, characterized in that: A plurality of threaded holes (2) are arranged in a ring on one side of the locking blade body (2) close to the blade body (1), a plurality of sunken grooves (101) corresponding to the threaded holes (2) are arranged in a ring on one side of the blade body (1) away from the locking blade body (2), and threaded holes (102) corresponding to the threaded holes (2) are provided in the sunken grooves (101).

6. The shield machine cutter according to claim 5, characterized in that: Bolts (3) are provided in the threaded hole one (102) and threaded hole two which correspond to each other. The bolts (3) are threadedly connected to the blade body (1) and the locking blade body (2). The blade body (1) and the locking blade body (2) are detachably connected via the bolts (3).

7. The shield machine cutter according to claim 6, characterized in that: The diameter of the sinking groove (101) is greater than the diameter of the threaded hole 1 (102), and the depth of the sinking groove (101) is greater than the thickness of the head of the bolt (3).

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