Shield tunneling machine cutter for hard rock tunneling

Abstract

The utility model discloses a shield tunneling machine cutter for hard rock tunneling, and belongs to the technical field of shield tunneling machine cutters. Comprising a cutter shaft, a cutter hub is installed outside the cutter shaft through a key, end covers are connected to the front end and the rear end of the cutter hub in a sealed mode, a cutter ring is installed outside the cutter hub in an interference fit mode, a clamping ring is installed on one side of the cutter ring, a spacer ring position is arranged in the center of the inner wall of the cutter hub, and a spacer ring is installed in the spacer ring position and comprises a first splicing block and a second splicing block. According to the shield tunneling machine cutter for hard rock tunneling, the detachable distance ring is arranged, and the stability, the machining precision and the stress distribution of the bearing position are optimized, so that the transmission performance of the whole cutter hub is remarkably improved, and the cutter runs more stably.

Description

TECHNICAL FIELD

[0001] The utility model relates to a shield machine cutter technical field for hard rock tunneling, concretely is a shield machine cutter for hard rock tunneling. BACKGROUND

[0002] The shield machine cutter is one of the key engineering components in hard rock tunneling operation, mainly responsible for rotating and cutting hard rock to push the shield machine forward. The hard rock tunneling environment is often accompanied by extremely high ground pressure, complex rock properties and large operation load, therefore, the structure and precision requirements of the cutter are extremely strict, especially the installation precision of the cutter hub and the stability of the bearing are crucial to the normal operation of the shield machine.

[0003] The traditional cutter hub structure of the shield machine usually adopts a fixed spacer position, which plays an isolating role on the bearings on both sides to protect the bearings and other mechanical components. However, this fixed spacer position has some defects in design and use, especially in the concentricity and installation precision between the cutter hub and the bearing. Since the spacer position is fixed and cannot be easily disassembled and adjusted, the machining precision of the bearing position is difficult to guarantee, and even the bearing may be unstable and unevenly stressed, which affects the precise movement of the cutter hub and the working performance of the cutter. SUMMARY

[0004] The utility model aims at providing a shield machine cutter for hard rock tunneling, by setting a detachable spacer ring, optimizing the stability, machining precision and stress distribution of the bearing position, significantly improving the transmission performance of the entire cutter hub, and making the cutter run more smoothly, solving the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a shield machine cutter for hard rock tunneling, comprising a cutter shaft, a cutter hub is installed on the cutter shaft through a key, end covers are sealingly connected to the front and rear ends of the cutter hub, a cutter ring is installed on the cutter hub through interference fit, a snap ring is installed on one side of the cutter ring, a spacer position is provided at the center position of the inner wall of the cutter hub, a spacer ring is installed inside the spacer position, the spacer ring comprises two parts of a first splicing block and a second splicing block.

[0006] Preferably, semicircular positioning grooves are formed at both ends of the first splicing block and the second splicing block, and the first splicing block and the second splicing block are connected through a positioning pin.

[0007] Preferably, a cutter ring position is provided on the outer wall of the cutter hub, and a snap ring position is provided on one side of the cutter ring position.

[0008] Preferably, bearing positions, framework positions and end cover positions are symmetrically provided outwardly on both sides of the spacer position.

[0009] Preferably, the bearing transition position of the inner wall of the spacer ring is in contact with the inner ring of the bearing in the bearing position, and the skeleton ring is arranged in the skeleton position in contact with the outer ring of the bearing in the bearing position.

[0010] Compared with the prior art, the utility model has the advantages that:

[0011] The shield machine cutter for hard rock tunneling has the spacer ring in a detachable structure, so that the two bearing positions on the two sides can be machined simultaneously after the spacer ring is disassembled and removed, the concentricity of the two bearing positions is ensured, the installation precision of the bearing is ensured, the stress is more uniform, the gap or contact problem caused by unstable bearing position is avoided, the accurate movement of the cutter hub is ensured, and the spacer ring can be conveniently disassembled and removed when needed, so that the two bearing positions can be conveniently overhauled, machined or replaced. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a whole structure schematic view of the utility model;

[0013] Figure 2 It is a whole structure side view of the utility model;

[0014] Figure 3 It is a cutter hub sectional view of the utility model;

[0015] Figure 4 It is a spacer ring structure schematic view of the utility model;

[0016] Figure 5 It is a spacer ring split structure schematic view of the utility model.

[0017] In the drawing: 1, cutter shaft; 2, end cover; 3, cutter hub; 4, cutter ring; 5, snap ring; 301, cutter ring position; 302, snap ring position; 303, end cover position; 304, skeleton position; 305, bearing position; 306, spacer ring position; 307, spacer ring; 308, first splicing block; 309, second splicing block; 310, positioning groove; 311, positioning pin. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0019] Please refer to Figures 1-5 The embodiment provides the following technical solutions:

[0020] The utility model provides a kind of shield machine cutter for hard rock excavation, including cutter shaft 1, cutter hub 3 is installed outside cutter shaft 1 by key, front and rear ends of cutter hub 3 are sealingly connected with end cap 2, and cutter hub 3 is installed with cutter ring 4 by interference fit outside, one side of cutter ring 4 is installed with snap ring 5, the center position of the inner wall of cutter hub 3 is provided with spacer ring position 306, spacer ring 307 is installed inside spacer ring position 306, spacer ring 307 includes first splice block 308 and second splice block 309 two parts, semicircular positioning slot 310 is set in the both ends of first splice block 308 and second splice block 309, and first splice block 308 and second splice block 309 are connected by positioning pin 311.

[0021] Specifically, spacer ring 307 is used to fix the position of the bearing on both sides, to prevent the bearing from displacement or displacement during operation. By correctly positioning the bearing on both sides of the spacer ring 307, the spacer ring 307 ensures the stability of the bearing and avoids unnecessary gaps or contact between the bearings, thereby ensuring the precise movement of the cutter hub 3. The end of the first splice block 308 and the end of the second splice block 309 are connected by inserting the positioning pin 311, thereby forming a complete annular shape. The length of the positioning pin 311 is consistent with the length of the positioning slot 310, avoiding the end of the positioning pin 311 from protruding. By setting the detachable spacer ring 307, the spacer ring 307 can be removed and taken out, allowing the machining of both bearing positions 305 at the same time, ensuring the concentricity of the two bearing positions 305, ensuring the installation accuracy of the bearing, and the stress will be more uniform, avoiding the gap or contact problem caused by unstable bearing position, thereby ensuring the precise movement of the cutter hub 3. The spacer ring 307 can be conveniently removed and taken out when needed, facilitating the maintenance, processing or replacement of the two bearing positions 305.

[0022] In this embodiment, the outer wall of the cutter hub 3 is provided with a cutter ring position 301, one side of the cutter ring position 301 is provided with a snap ring position 302, the spacer ring position 306 is provided with a bearing position 305, a skeleton position 304 and an end cap position 303 outwardly and symmetrically on both sides, the bearing transition position of the inner wall of the spacer ring 307 contacts the inner ring of the bearing in the bearing position 305, and the skeleton position 304 is provided with a skeleton ring contacting the outer ring of the bearing in the bearing position 305.

[0023] Specifically, by setting the cutter ring position 301 and the snap ring position 302 on the outer wall of the cutter hub 3, and installing the cutter ring 4 by interference fit, the snap ring 5 is used to block the cutter ring 4 from shifting, ensuring the firm connection between the cutter ring 4 and the cutter hub 3, which can effectively improve the stability of the cutter, reduce the deviation or wear of the cutter during high-speed rotation, and prolong the service life of the cutter. The bearing transition position of the inner wall of the spacer ring 307 contacts the inner ring of the bearing, and the skeleton ring provided in the skeleton position 304 can further enhance the axial stability of the cutter, providing better support force and compression resistance.

[0024] Working principle: the knife hub 3 end through the chuck on the numerical control lathe clamping, in the knife circle position 301 and bearing position 305 finishing, ensure that the two concentricity is consistent, avoid tool offset wear, after processing, install the spacer ring 307, first install the second splice block 309 to the spacer ring position 306, then install the first splice block 308 to the spacer ring position 306, make the end of the first splice block 308 and the end of the second splice block 309 connected, finally insert the positioning pin 311 into the positioning groove 310, complete the assembly of the spacer ring 307.

Claims

1. A shield machine cutter for hard rock tunneling, comprising a cutter shaft (1), a cutter hub (3) is installed on the cutter shaft (1) by a key, end covers (2) are sealingly connected to front and rear ends of the cutter hub (3), and a cutter ring (4) is installed on the cutter hub (3) by interference fit, and a snap ring (5) is installed on one side of the cutter ring (4), characterized in that: A partition ring position (306) is arranged at the center position of the inner wall of the cutter hub (3), and a partition ring (307) is arranged in the partition ring position (306).

2. A cutter for a tunnel boring machine for boring into hard rock as claimed in claim 1 wherein: The first splicing block (308) and the second splicing block (309) are connected through a positioning pin (311).

3. A cutter for a tunneling shield for use in hard rock tunneling according to claim 1, characterized in that: The outer wall of the cutter hub (3) is provided with a cutter ring position (301), and one side of the cutter ring position (301) is provided with a clamping ring position (302).

4. A cutter for a tunneling shield machine for use in hard rock tunneling according to claim 1, characterized in that: The bearing position (305), the framework position (304) and the end cover position (303) are arranged symmetrically and outwardly in sequence on the two sides of the partition ring position (306).

5. A cutter for a tunneling shield for use in hard rock tunneling according to claim 4, characterized in that: The bearing transition position of the inner wall of the partition ring (307) is in contact with the bearing inner ring in the bearing position (305), and the framework position (304) is provided with a framework ring in contact with the bearing outer ring in the bearing position (305).

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