Double-retainer-ring single-blade hob for shield tunneling machine
By adopting a double-stop ring design and an L-shaped stop ring structure on the shield machine hob, the problem of premature loosening of the stop ring is solved, the stability of the knife ring and the stress contact area are improved, and the connection stability between the knife hub and the stop ring is enhanced.
Patent Information
- Application Number
- CN202422604661.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-10-28
AI Technical Summary
The retaining ring of the existing single-edge hob is prone to loosening prematurely, resulting in sharpening and breaking of the knife ring, and cannot effectively prevent displacement caused by axial forces.
The double-stop ring design is adopted, and an L-shaped retaining ring is added and a groove is added to the shoulder of the knife hub. The inner ring of the L-shaped retaining ring is fitted with the retaining ring slot, the outer ring is fitted with the outer wall of the knife hub. The chamfer is designed to be 45-60 degrees, providing lateral force to prevent the retaining ring from flipping and increasing the contact area under stress.
It enhances the stability of the knife ring during the excavation process, improves the convenience of the knife hub and the retaining ring to prevent premature loosening and wear of the retaining ring.
Smart Images
Figure CN223136135U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of shield machine cutters, in particular to a double retaining ring single-edge cutter for shield machines. Background Technique
[0002] In order to prevent the cutter ring from shifting and loosening under the action of axial force during tunneling, the existing single-edge cutter usually adopts a single retaining ring design. Generally, a circular retaining ring is arranged at the lower end of the cutter ring body. During processing, a groove is opened on the outer side of the cutter hub to facilitate the installation of the retaining ring. The upper end of the cutter ring body prevents the cutter ring from tipping over by adopting the design of raising the shoulder of the cutter hub (see Figure 5 ). Generally, the designed retaining ring cannot provide a large lateral force when subjected to the axial force of the cutter ring. After a long time, the retaining ring is prone to flipping, the cutter ring loses support, loosens prematurely, and causes eccentric wear and fracture of the cutter ring. Content of the Utility Model
[0003] The purpose of the utility model is to provide a double retaining ring single-edge cutter for shield machines to solve the problem of premature loosening of the retaining ring proposed in the above background technique.
[0004] To achieve the above purpose, the utility model provides the following technical solution: A double retaining ring single-edge cutter for shield machines includes a cutter hub, a cutter ring is sleeved on the outer edge of the cutter hub, the shoulder of the cutter hub is raised and abuts against one side of the cutter ring, two retaining ring grooves are arranged on the outer edge of the cutter ring, one of the retaining ring grooves is located at the raised part of the shoulder of the cutter hub and is not communicated between the retaining ring groove and the cutter ring, the outer edge of the other retaining ring groove is flush with the side wall of the cutter ring, and two L-shaped retaining rings are sleeved in the two retaining ring grooves, and the two L-shaped retaining rings respectively abut against both sides of the cutter ring.
[0005] Preferably, the L-shaped retaining ring includes a stepped inner ring and an outer ring, the inner ring is attached to the bottom wall of the retaining ring groove, and the outer ring is attached to the outer wall of the cutter hub.
[0006] Preferably, the side of the L-shaped retaining ring away from the cutter ring is chamfered, and the chamfer angle is 45-60 degrees.
[0007] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0008] The double retaining ring single-edge cutter for shield machines of the utility model adds a groove at the position of the raised shoulder of the cutter hub, adds an L-shaped retaining ring, and adopts a double retaining ring design, which further enhances the stability of the cutter ring during tunneling and enhances the convenience of the connection between the cutter hub body and the retaining ring groove. Description of the Drawings
[0009] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0010] Figure 2Schematic diagram of the cutter hub structure in the present utility model;
[0011] Figure 3 Force diagram of the cutter ring in the present utility model;
[0012] Figure 4 Schematic diagram of the retaining ring structure in the present utility model;
[0013] Figure 5 Schematic diagram of the hob structure before improvement.
[0014] In the figure: 1, cutter hub; 2, cutter ring; 3, L-shaped retaining ring; 31, inner ring; 32, outer ring; 4, retaining ring slot. Specific implementation mode
[0015] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.
[0016] Please refer to Figures 1-4 , a double retaining ring single-edge hob for a shield machine, including a cutter hub 1, a cutter ring 2 is sleeved on the outer edge of the cutter hub 1, the shoulder of the cutter hub 1 is heightened and abuts against one side of the cutter ring 2, two retaining ring slots 4 are arranged on the outer edge of the cutter ring 2, one of the retaining ring slots 4 is located at the heightened part of the shoulder of the cutter hub 1 and there is no communication between the retaining ring slot 4 and the cutter ring 2, the outer edge of the other retaining ring slot 4 is flush with the side wall of the cutter ring 2, two L-shaped retaining rings 3 are sleeved in the two retaining ring slots 4, and the two L-shaped retaining rings 3 respectively abut against both sides of the cutter ring 2.
[0017] The L-shaped retaining ring 3 includes a stepped inner ring 31 and an outer ring 32, the inner ring 31 is attached to the bottom wall of the retaining ring slot 4, and the outer ring 32 is attached to the outer wall of the cutter hub 1.
[0018] Working principle: In the present invention, the structure of the retaining ring and the cutter hub 1 is designed and improved. The retaining ring is designed into an L shape, and the outer side of the L-shaped retaining ring is chamfered, and the angle of the chamfer is between 45° and 60°, so as to provide a lateral force to prevent the retaining ring from flipping. At the same time, it also increases the force-bearing contact area between the retaining ring and the cutter ring and the cutter body, preventing premature wear and causing the cutter ring to loosen. In order to distinguish from the previous design of the cutter hub 1 which would adopt a heightened design at the shoulder to prevent the cutter ring from tipping over, a groove is added to the heightened position of the shoulder of the cutter hub 1 this time, and a new L-shaped retaining ring is added, adopting a double-retaining-ring design, which further enhances the stability of the cutter ring during tunneling and enhances the convenience when the cutter hub 1 body is clamped with the retaining ring (see Figure 1 ).
Claims
1. A double retaining ring single-edge hob for a shield machine, comprising a cutter hub (1), a cutter ring (2) is sleeved on the outer edge of the cutter hub (1), the shoulder of the cutter hub (1) is heightened and abuts against one side of the cutter ring (2), and it is characterized in that: Two retaining ring grooves (4) are provided on the outer edge of the cutter ring (2). One of the retaining ring grooves (4) is located at the raised shoulder of the cutter hub (1), and there is no communication between the retaining ring groove (4) and the cutter ring (2). The outer edge of the other retaining ring groove (4) is flush with the side wall of the cutter ring (2). Two L-shaped retaining rings (3) are sleeved in the two retaining ring grooves (4), and the two L-shaped retaining rings (3) are respectively abutted against both sides of the cutter ring (2).
2. The double retaining ring single-edge hob for shield machine according to claim 1, characterized in that: The L-shaped retaining ring (3) includes a stepped inner ring (31) and an outer ring (32). The inner ring (31) is in contact with the bottom wall of the retaining ring groove (4), and the outer ring (32) is in contact with the outer wall of the cutter hub (1).
3. The double retaining ring single-edge hob for shield machine according to claim 1, characterized in that: One side of the L-shaped retaining ring (3) away from the cutter ring (2) is chamfered, and the chamfer angle is 45 - 60 degrees.