Hard rock tunneling shield machine hob structure

Abstract

The utility model belongs to the technical field of tunnel engineering, and discloses a hard rock tunneling shield machine hob structure which comprises a hob shaft, an upper end cover is fixedly installed at one end of the outer side of the hob shaft, a lower end cover is fixedly installed at the other end of the outer side of the hob shaft, and compass roller bearings are symmetrically connected to the outer side of the hob shaft in an interference fit mode. Two floating rings are arranged between the lower end cover and the opposite faces of the two compass roller bearings and between the upper end cover and the opposite faces of the two compass roller bearings respectively, rubber rings are arranged at the top ends of the floating rings, cutter hubs are installed between the two compass roller bearings and the outer sides of the lower end cover and the upper end cover, and cutter rings are connected to the outer sides of the cutter hubs in an interference fit mode. The hobbing cutter structure has the advantages that the hobbing cutter structure can be conveniently assembled, the assembling difficulty of the hobbing cutter structure is changed, therefore, the time needed for assembling the hobbing cutter structure is saved, and the sealing performance of the hobbing cutter structure after the hobbing cutter structure is assembled can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel engineering, and in particular relates to a roller cutter structure of a hard rock tunneling shield machine. Background Art

[0002] In tunnel engineering, a shield machine is a device used to excavate underground tunnels, while a hard rock tunneling shield machine is specifically used for tunnel excavation under hard rock geological conditions. The cutter structure is an important component of the shield machine, which is used to cut and crush rocks to ensure the smooth advancement of the shield machine.

[0003] The existing hob structure is not easy to assemble, resulting in a problem of too long assembly time, thereby increasing the assembly time of the hob structure and causing the problem of low assembly efficiency of the hob structure. Summary of the invention

[0004] The present invention aims at the problem that the hob structure in the prior art is inconvenient to assemble, resulting in a long assembly time, thereby increasing the assembly time of the hob structure and causing low assembly efficiency of the hob structure. The present invention proposes the following technical solution:

[0005] A roller cutter structure of a hard rock tunneling shield machine comprises: a cutter shaft, an upper end cover is fixedly mounted on one end of the outer side of the cutter shaft, a lower end cover is fixedly mounted on the other end of the outer side of the cutter shaft, a compass roller bearing is symmetrically connected to the outer side of the cutter shaft through interference fit, two groups of floating rings are respectively arranged between the lower end cover and the upper end cover and the opposite surfaces of the two compass roller bearings, a rubber ring is arranged on the top of the floating ring, a cutter hub is installed between the two compass roller bearings and the outer sides of the lower end cover and the upper end cover, a cutter ring is connected to the outer side of the cutter hub through interference fit, a clamping ring is clamped and mounted on the outer side of the cutter hub at the bottom end of the cutter ring, and a sealing ring is arranged at the connection between the upper end cover, the lower end cover and the cutter shaft.

[0006] Preferably, gear oil is provided at a position between two compass roller bearings on the opposing surfaces of the cutter hub and the cutter shaft.

[0007] Preferably, the bottom ends of the inner walls of the lower end cover and the upper end cover are both equipped with abutment mechanisms, and the abutment mechanisms include spring rods fixedly mounted on the lower end cover and the upper end cover, one end of the spring rod is fixedly mounted with an arc plate, and one end of the arc plate is movably connected with an arc strip.

[0008] Preferably, one ends of a plurality of the arc-shaped strips are connected by a circular ring, and the outer diameter of the circular ring is equal to the outer diameter of the arc-shaped strip.

[0009] Preferably, a telescopic rod is fixedly mounted on one end of three of the arc-shaped bars, a screw rod is welded on one end of another arc-shaped bar, and a threaded sleeve is connected to the outer side of the screw rod through a thread.

[0010] Preferably, the threaded sleeve is rotatably connected to the inside of the arc-shaped plate, and an arc-shaped groove is provided at a position at one end of the arc-shaped plate corresponding to one end of the arc-shaped strip.

[0011] The beneficial effects of the present invention are:

[0012] (1) It can facilitate the assembly of the hob structure, change the assembly difficulty of the hob structure, thereby saving the time required for the assembly of the hob structure, and can improve the sealing performance of the hob structure after assembly;

[0013] (2) It can increase the stability of the floating ring after installation and prevent the floating ring from being displaced after installation, thereby making the position of the floating ring more accurate after installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The diagram shows a structural schematic diagram of a cutter structure of a hard rock tunneling shield machine;

[0015] Figure 2 Shown is a cross-sectional view of a cutter structure of a hard rock tunneling shield machine;

[0016] Figure 3 Shown is a schematic structural diagram of the abutment mechanism.

[0017] In the figure: 1. knife shaft; 2. upper end cover; 3. floating ring; 4. rubber ring; 5. knife ring; 6. knife hub; 7. lower end cover; 8. sealing ring; 9. snap ring; 10. compass roller bearing; 11. gear oil;

[0018] 12. abutment mechanism; 1201. spring rod; 1202. arc plate; 1203. telescopic rod; 1204. arc strip; 1205. circular ring; 1206. screw rod; 1207. threaded sleeve. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0020] Example 1

[0021] The present invention provides a hard rock tunneling shield machine cutter structure, such as Figure 1-3As shown, it includes: a cutter shaft 1, an upper end cover 2 is fixedly installed at one end of the outer side of the cutter shaft 1, a lower end cover 7 is fixedly installed at the other end of the outer side of the cutter shaft 1, a compass roller bearing 10 is symmetrically connected to the outer side of the cutter shaft 1 through interference fit, two groups of floating rings 3 are respectively arranged between the lower end cover 7 and the upper end cover 2 and the opposite surfaces of the two compass roller bearings 10, a rubber ring 4 is arranged on the top of the floating ring 3, a cutter hub 6 is installed between the two compass roller bearings 10 and the outer sides of the lower end cover 7 and the upper end cover 2, a cutter ring 5 is connected to the outer side of the cutter hub 6 through interference fit, a retaining ring 9 is clamped and installed at the bottom end of the cutter ring 5 on the outer side of the cutter hub 6, and an O-ring 8 is arranged at the connection between the upper end cover 2, the lower end cover 7 and the cutter shaft 1.

[0022] like Figure 1 and Figure 2 As shown, gear oil 11 is provided between two compass roller bearings 10 on the opposing surfaces of the cutter hub 6 and the cutter shaft 1 to increase the lubrication of the internal compass roller bearings 10 and prevent the compass roller bearings 10 from being damaged due to friction.

[0023] like Figure 2 and Figure 3 As shown, the lower end cover 7 and the lower end cover 2 are both provided with abutment mechanisms 12 at the bottom of the inner wall. The abutment mechanisms 12 include a spring rod 1201 fixedly installed on the lower end cover 7 and the upper end cover 2. An arc plate 1202 is fixedly installed on one end of the spring rod 1201. An arc strip 1204 is movably connected to one end of the arc plate 1202. One ends of the arc strips 1204 are connected by a circular ring 1205. The outer diameter of the circular ring 1205 is equal to the outer diameter of the arc strip 1204. The circular ring 1205 is used for synchronous displacement of the plurality of arc strips 1204, and the purpose of supporting the two groups of floating rings 3 is achieved. A telescopic rod 1203 is fixedly installed at one end of the three arc-shaped bars 1204, and a screw rod 1206 is welded to one end of another arc-shaped bar 1204. A threaded sleeve 1207 is threadedly connected to the outer side of the screw rod 1206, which is used to move the arc-shaped bar 1204 and to position the arc-shaped bar 1204 after movement. The threaded sleeve 1207 is rotatably connected to the inside of the arc-shaped plate 1202, and an arc-shaped groove is provided at one end of the arc-shaped plate 1202 at a position corresponding to one end of the arc-shaped bar 1204, which is used to store the arc-shaped bar 1204, thereby reducing the area occupied by the arc-shaped bar 1204.

[0024] Working principle: During the actual use of the device, the user puts the cutter hub 6 into the outside of the cutter shaft 1, and then clamps the two sets of compass roller bearings 10 on the opposite sides of the cutter hub 6 and the cutter shaft 1. Then the user installs one set of floating rings 3 and rubber rings 4. At this time, the user installs the second set of floating rings 3 and rubber rings 4 on the abutment mechanisms 12 of the upper end cover 2 and the lower end cover 7 respectively. At this time, the user first rotates the threaded sleeve 1207. When the threaded sleeve 1207 rotates, the flagpole 1206 moves. When the screw rod 1206 moves, it drives the arc bar 1204 to move. When the arc bar 1204 moves, it drives the circular ring 1205 moves, and the circular ring 1205 moves, driving the other arc-shaped strips 1204 to move. At this time, the other arc-shaped strips 1204 drive the telescopic rod 1203 to stretch when they move, and then install the upper end cover 2, the lower end cover 7 and the knife shaft 1 respectively. At this time, the circular ring 1205 enters the bottom end of the first group of floating rings 3 and rubber rings 4 to support them, thereby increasing the stability of the installation of the two groups of floating rings 3 and rubber rings 4. Finally, the knife ring 5 and the knife hub 6 are fixed by interference fit, and then the retaining ring 9 is installed at the bottom end of the knife ring 5, thereby achieving the purpose of supporting and fixing the knife ring 5.

[0025] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A cutter structure of a hard rock tunneling shield machine, characterized in that: include: A knife shaft (1), wherein an upper end cover (2) is fixedly mounted on one end of the outer side of the knife shaft (1), and a lower end cover (7) is fixedly mounted on the other end of the outer side of the knife shaft (1); a compass roller bearing (10) is symmetrically connected to the outer side of the knife shaft (1) through interference fit; two groups of floating rings (3) are respectively arranged between the lower end cover (7) and the upper end cover (2) and the opposite surfaces of the two compass roller bearings (10); a rubber ring (4) is arranged at the top of the floating ring (3); a knife hub (6) is installed between the two compass roller bearings (10) and the outer sides of the lower end cover (7) and the upper end cover (2); a knife ring (5) is connected to the outer side of the knife hub (6) through interference fit; a clamping ring (9) is clamped and mounted on the outer side of the knife hub (6) at the bottom end of the knife ring (5); and an O-type sealing ring (8) is arranged at the connection between the upper end cover (2), the lower end cover (7) and the knife shaft (1).

2. A hard rock tunneling shield machine cutter structure according to claim 1, characterized in that: Gear oil (11) is provided at a position between two compass roller bearings (10) on the opposing surfaces of the cutter hub (6) and the cutter shaft (1).

3. The cutter structure of a hard rock tunneling shield machine according to claim 1, characterized in that: The bottom ends of the inner walls of the lower end cover (7) and the upper end cover (2) are both provided with abutment mechanisms (12), the abutment mechanisms (12) comprising a spring rod (1201) fixedly mounted on the lower end cover (7) and the upper end cover (2), one end of the spring rod (1201) being fixedly mounted with an arc plate (1202), and one end of the arc plate (1202) being movably connected with an arc strip (1204).

4. A hard rock tunneling shield machine cutter structure according to claim 3, characterized in that: One ends of the plurality of arc-shaped strips (1204) are connected via a circular ring (1205), and the outer diameter of the circular ring (1205) is equal to the outer diameter of the arc-shaped strip (1204).

5. The cutter structure of a hard rock tunneling shield machine according to claim 3, characterized in that: One end of three of the arc-shaped bars (1204) is fixedly mounted with a telescopic rod (1203), and one end of another arc-shaped bar (1204) is welded with a screw rod (1206), and the outer side of the screw rod (1206) is connected with a threaded sleeve (1207) via a thread.

6. A hard rock tunneling shield machine cutter structure according to claim 5, characterized in that: The threaded sleeve (1207) is rotatably connected to the inside of the arc plate (1202), and an arc groove is provided at one end of the arc plate (1202) corresponding to one end of the arc strip (1204).

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