Hob mechanism and shield tunneling machine cutter box

Abstract

The utility model discloses a hobbing cutter mechanism and a shield tunneling machine cutter box. The hobbing cutter mechanism comprises a hobbing cutter, a sealing assembly and a detection head. The hobbing cutter comprises a mandrel and a cutter hub, the cutter hub is hollow, the two ends of the cutter hub are open, and the mandrel is rotationally sleeved with the cutter hub. The sealing assembly comprises an end cover, a moving ring and a static ring, the end cover is arranged at the open end of the cutter hub, fixed to the mandrel and provided with a channel communicated with an inner cavity of the cutter hub, the moving ring is installed in the cutter hub and provided with a trigger part capable of stretching into the channel, and the static ring is installed on the inner side of the end cover and abuts against the moving ring to form a floating oil seal; the detection head is installed in the channel and used for monitoring the rotating speed of the trigger part. According to the scheme, the trigger part is arranged on the movable ring, and the detection head is arranged in the channel of the end cover, so that the sealing performance of the hob mechanism is ensured, the speed measurement assembly is prevented from occupying excessive space in the hob hub, and the space utilization rate of the inner cavity of the hob hub is improved; the purpose of preventing working condition difficulty is achieved by monitoring the rotating speed of the hob, the structure is relatively simple, and the cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of roller cutters, in particular to a roller cutter mechanism and a cutter box of a shield machine. Background Art

[0002] The application of shield machines is becoming more and more widespread. The roller cutter is a tool used for excavation on the cutter box of the shield machine, which is used to crush and cut rocks. For example, patent CN 211144496 U discloses an intelligent roller cutter with a speed self-test function, which has a first power generation component and a first monitoring component installed in the cutter hub, and a second power generation component and a second monitoring component installed on the spacer ring of the bearing. The first monitoring component cooperates with the second monitoring component to monitor the speed of the cutter hub, and the first power generation component and the second power generation component generate electricity to power the monitoring component.

[0003] However, in this patent, the first monitoring component and the second monitoring component are both arranged in the inner cavity of the cutter hub, occupying a large space, reducing the space utilization rate in the cutter hub, increasing the volume of the roller cutter, and having a high cost. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned technical deficiencies and propose a roller cutter mechanism and a shield machine cutter box to solve the technical problems in the prior art that the speed measuring component occupies a large space, reduces the space utilization rate in the cutter hub, increases the volume of the roller cutter, and has a high cost.

[0005] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0006] In a first aspect, the utility model provides a hob mechanism, comprising:

[0007] The hob comprises a core shaft and a cutter hub, wherein the cutter hub is hollow inside and open at both ends, and the cutter hub is rotatably sleeved on the core shaft;

[0008] A sealing assembly, comprising an end cover, a dynamic ring and a static ring, wherein the end cover is disposed at the open end of the cutter hub and fixed to the core shaft, and is provided with a passage communicating with the inner cavity of the cutter hub, the dynamic ring is installed in the cutter hub and is provided with a triggering portion capable of extending into the passage, and the static ring is installed on the inner side of the end cover and abuts against the dynamic ring to form a floating oil seal; and

[0009] A detection head is installed in the channel and is used to monitor the rotation speed of the trigger part.

[0010] In some embodiments, the inner wall of the channel is provided with an internal thread, the outer wall of the detection head is provided with an external thread, and the detection head is screwed into the channel.

[0011] In some embodiments, the detection head is provided with a first thread segment and a second thread segment in sequence along a direction away from the tool hub, the first thread segment is screwed into the channel, and the second thread segment extends out of the channel;

[0012] The hob mechanism also includes a locking nut, which is threadedly arranged on the second threaded section.

[0013] In some embodiments, the first thread segment and the second thread segment have the same thread hand direction.

[0014] In some embodiments, the detection head is provided with a sealing groove between the first thread segment and the second thread segment, and the hob mechanism further includes a probe sealing ring, and the probe sealing ring is placed in the sealing groove; and / or,

[0015] The inner wall of the channel is provided with a stopping step, and the detection head is further provided with a limiting step between the first thread segment and the second thread segment, and the limiting step is stopped at a side of the stopping step close to the tool hub.

[0016] In some embodiments, the dynamic ring includes a dynamic floating seal seat, a dynamic rubber ring and a dynamic floating seal ring. The dynamic floating seal seat is installed in the cutter hub and is adjacent to the end cover. The dynamic floating seal ring is installed at intervals on the inner side of the dynamic floating seal seat to form a dynamic sealing gap with the dynamic floating seal seat. The dynamic rubber ring is installed in the dynamic sealing gap.

[0017] Wherein, the trigger part is arranged on the inner wall of the dynamic floating sealing ring.

[0018] In some embodiments, a static floating seal seat is protruded from the inner side of the end cover toward the inner cavity of the blade hub, and the static ring includes a static rubber ring and a static floating seal ring. The static floating seal ring is installed on the inner side of the static floating seal seat at intervals to form a static sealing gap between the static floating seal seat and the static rubber ring is installed in the static sealing gap.

[0019] In some embodiments, the triggering part is a magnetic induction tooth provided on the inner wall of the moving ring, and the magnetic induction tooth can fall on the axial direction of the channel during the rotation stroke of the moving ring and extend into the channel;

[0020] The detection head is a magnetic induction probe, which is triggered when the magnetic induction tooth falls in the axial direction of the channel and outputs an electrical signal.

[0021] In some embodiments, the magnetic induction teeth are provided in plurality, and the plurality of magnetic induction teeth are arranged at intervals along the circumference of the moving ring.

[0022] In a second aspect, the utility model further provides a shield machine cutter box, which includes the roller cutter mechanism as described above.

[0023] Compared with the prior art, in the hob mechanism provided by the utility model, the cutter hub rotates relative to the core shaft, while the end cover is stationary relative to the core shaft, and a floating oil seal composed of a moving ring and a stationary ring is arranged between the cutter hub and the end cover; at the same time, the trigger part is arranged on the moving ring, and the detection head is arranged in the channel of the end cover. In this way, while ensuring the sealing performance of the hob mechanism, it is avoided that the speed measuring component occupies too much space in the cutter hub, thereby improving the space utilization rate of the inner cavity of the cutter hub; and because the moving ring rotates synchronously with the cutter hub, and the detection head is stationary with the end cover, the rotation speed of the cutter hub can be obtained by measuring the speed of the trigger part by the detection head, so as to determine whether the hob has eccentric wear, or is about to have eccentric wear, and whether it has been abnormally damaged, etc. by monitoring the hob speed, thereby achieving the purpose of preventing working conditions from becoming difficult, and the structure is relatively simple and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a cross-sectional view of an embodiment of a hob mechanism provided by an embodiment of the utility model;

[0025] Figure 2 yes Figure 1 The enlarged schematic diagram of point A in the middle;

[0026] Figure 3 yes Figure 1 A cross-sectional view of the middle blade hub and end cover;

[0027] Figure 4 yes Figure 3 A cross-sectional view of the middle end cover from another angle;

[0028] Figure 5 yes Figure 2 A partial enlarged view of the detection head when it is installed in the channel;

[0029] Figure 6 yes Figure 5 The structural diagram of the detection head;

[0030] Figure 7 yes Figure 2 Cross-sectional view of the dynamic ring and the static ring;

[0031] Figure 8 yes Figure 7 The enlarged schematic diagram of point B in the middle;

[0032] Fig. 9 yes Figure 7 Schematic diagram of the structure of the mid-moving floating seal ring.

[0033] Description of reference numerals:

[0034] 100. Hob mechanism; 1. Mandrel; 2. Cutter hub; 21. Hub body; 22. Cutter ring; 3. End cover; 3a. Channel; 31. Stop step; 32. Static floating seal seat; 4. Dynamic ring; 41. Trigger unit; 411. Magnetic induction tooth; 42. Dynamic floating seal seat; 43. Dynamic rubber ring; 44. Dynamic floating seal ring; 5. Static ring; 51. Static rubber ring; 52. Static floating seal ring; 6. Probe; 6a. Sealing groove; 61. First threaded section; 62. Second threaded section; 63. Probe seal ring; 64. Limit step; 7. Locking nut; 8. Bearing. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0036] In order to solve the technical problems in the prior art that the speed measuring component occupies a large space, reduces the space utilization rate in the cutter hub, increases the volume of the roller cutter, and has a high cost, the utility model provides a roller cutter mechanism, which can avoid the speed measuring component occupying too much space in the cutter hub while ensuring the sealing performance of the roller cutter mechanism, thereby improving the space utilization rate of the inner cavity of the cutter hub, and is convenient for preventing working conditions from becoming difficult by monitoring the rotation speed of the roller cutter, and has a relatively simple structure and low cost.

[0037] It should be noted that the cutter wheel mechanism described in the present invention is used for the cutter box of a shield machine, but is not limited to the cutter box of a shield machine. For the convenience of explanation, in the present invention, only the cutter wheel mechanism applied to the cutter box of a shield machine is used as an example for explanation. The principle of applying the cutter wheel mechanism to other types of equipment is essentially the same as the principle applied to the cutter box of a shield machine, and will not be described in detail here.

[0038] See also Figures 1 to 4 , Figures 1 to 4 The schematic diagram of the structure of the hob mechanism 100 in one embodiment of the utility model comprises a hob, a sealing assembly and a detection head 6; the hob comprises a core shaft 1 and a cutter hub 2, the cutter hub 2 is hollow inside and open at both ends, and the cutter hub 2 is rotatably mounted on the core shaft 1; the sealing assembly comprises an end cover 3, a moving ring 4 and a stationary ring 5, the end cover 3 is arranged at the open end of the cutter hub 2 and fixed to the core shaft 1, and is provided with a channel 3a connected to the inner cavity of the cutter hub 2, the moving ring 4 is installed in the cutter hub 2, and is provided with a triggering part 41 that can extend into the channel 3a, the stationary ring 5 is installed on the inner side of the end cover 3 and abuts against the moving ring 4 to form a floating oil seal; the detection head 6 is installed in the channel 3a, and is used to monitor the rotation speed of the triggering part 41. Specifically, the cutter hub 2 is rotatably mounted on the core shaft 1 around its axial direction, and its opening is located at both ends of its own axial direction.

[0039] In this embodiment, the cutter hub 2 rotates relative to the core shaft 1, while the end cover 3 is stationary relative to the core shaft 1, and a floating oil seal consisting of a moving ring 4 and a stationary ring 5 is arranged between the cutter hub 2 and the end cover 3; at the same time, the trigger part 41 is arranged on the moving ring 4, and the detection head 6 is arranged in the channel 3a of the end cover 3. In this way, while ensuring the sealing performance of the hob mechanism 100, it is avoided that the speed measuring component occupies too much space in the cutter hub 2, thereby improving the space utilization rate of the inner cavity of the cutter hub 2; and because the moving ring 4 rotates synchronously with the cutter hub 2, and the detection head 6 is stationary with the end cover 3, the rotation speed of the cutter hub 2 can be obtained by measuring the speed of the trigger part 41 by the detection head 6, so as to determine whether the hob has eccentric wear, or is about to have eccentric wear, and whether it has been abnormally damaged, etc. by monitoring the hob speed, thereby achieving the purpose of preventing working conditions from becoming difficult, and the structure is relatively simple and the cost is low.

[0040] In one embodiment, see Figure 2 and Figure 5 The inner wall of the channel 3a is provided with an internal thread, the outer wall of the detection head 6 is provided with an external thread, and the detection head 6 is screwed into the channel 3a.

[0041] In this embodiment, the detection head 6 is screwed and installed in the channel 3a of the end cover 3, which is simple and convenient to assemble and has a reliable structure.

[0042] In one embodiment, see Figure 5 and Figure 6 The detection head 6 is provided with a first thread segment 61 and a second thread segment 62 in sequence along the direction away from the cutter hub 2, the first thread segment 61 is screwed into the channel 3a, and the second thread segment 62 extends out of the channel 3a; the hob mechanism 100 also includes a locking nut 7, which is screwed into the second thread segment 62.

[0043] In this embodiment, the end of the detection head 6 extending out of the channel 3a is also locked by a locking nut 7, which further improves the installation stability of the detection head 6. Specifically, the first thread segment 61 and the second thread segment 62 have the same thread rotation direction. In this way, after tightening, the double-layer tightening and loosening effect is better, and the locking nut 7 and the detection head 6 itself form a self-locking (the direction of loosening the detection head is the direction of tightening the locking nut 7), further enhancing the loosening effect.

[0044] In one embodiment, the detection head 6 is provided with a sealing groove 6a between the first thread segment 61 and the second thread segment 62, and the rolling cutter mechanism 100 further includes a probe sealing ring 63, and the probe sealing ring 63 is placed in the sealing groove.

[0045] In this embodiment, a sealing groove 6a is provided on the detection head 6, and a probe sealing ring 63 is installed in the sealing groove 6a, so as to change the shaft end seal into a radial seal, so that the seal is more reliable and the safety is better.

[0046] At the same time, a stop step 31 is provided on the inner wall of the channel 3a, and a limit step 64 is provided between the first thread segment 61 and the second thread segment 62 of the detection head 6, and the limit step 64 is stopped at the side of the stop step 31 close to the tool hub 2. In this way, when installing, the detection head 6 is screwed into the channel 3a from the inner side of the end cover 3 until the limit step 64 is stopped by the stop step 31, and then the locking nut 7 is screwed on the second thread segment 62, so that the detection head 6 can be more tightly connected to the end cover 3.

[0047] In one embodiment, see Figure 7 and Figure 8 The dynamic ring 4 includes a dynamic floating seal seat 42, a dynamic rubber ring 43 and a dynamic floating seal ring 44. The dynamic floating seal seat 42 is installed in the cutter hub 2 and is adjacent to the end cover 3. The dynamic floating seal ring 44 is installed at intervals on the inner side of the dynamic floating seal seat 42 to form a dynamic sealing gap between the dynamic floating seal seat 42 and the dynamic rubber ring 43. The trigger part 41 is arranged on the inner wall of the dynamic floating seal ring 44.

[0048] In this embodiment, the dynamic ring 4 is configured as a universal dynamic floating seal seat 42, a dynamic rubber ring 43 and a dynamic floating seal ring 44 to effectively ensure the sealing of the hob mechanism 100, and the trigger part 41 is arranged on the inner wall of the floating seal ring to make the overall structure more compact.

[0049] It should be noted that a bearing 8 is also installed in the cutter hub 2, and the inner ring and outer ring of the bearing 8 are arranged in a staggered manner to form a space for installing the dynamic floating seal seat 42, the dynamic rubber ring 43 and the dynamic floating seal ring 44, further improving the space utilization rate of the inner cavity of the cutter hub 2. In addition, in this solution, the cutter hub 2 includes a hub body 21 and a cutter ring 22, the hub body 21 is rotatably installed on the core shaft 1 around its axial direction, the end cover 3 is covered on the open end of the hub body 21, the dynamic ring 4 is arranged inside the hub body 21 and is located at its open end; the cutter ring 22 is installed outside the hub body 21.

[0050] Correspondingly, a static floating seal seat 32 is protruded from the inner side of the end cover 3 toward the inner cavity of the cutter hub 2. The static ring 5 includes a static rubber ring 51 and a static floating seal ring 52. The static floating seal ring 52 is installed at intervals on the inner side of the static floating seal seat 32 to form a static sealing gap with the static floating seal seat 32. The static rubber ring 51 is installed in the static sealing gap. In this embodiment, the static floating seal seat 32 is integrated with the end cover 3 to further improve the space utilization of the inner cavity of the cutter hub 2 while saving costs. In addition, a groove is also provided on the outer periphery of the floating seal seat, and a plurality of grooves are provided at intervals along its axial direction, and the groove is provided for the sealing rubber ring to be installed.

[0051] In one embodiment, see Fig. 9The trigger part 41 is a magnetic induction tooth 411 arranged on the inner wall of the moving ring 4. The magnetic induction tooth 411 can fall on the axial direction of the channel 3a during the rotation stroke of the moving ring 4 and extend into the channel 3a; the detection head 6 is a magnetic induction probe. The magnetic induction probe is triggered when the magnetic induction tooth 411 falls on the axial direction of the channel 3a and outputs an electrical signal.

[0052] In this embodiment, when the moving ring 4 rotates with the cutter hub 2, the magnetic induction teeth 411 thereon can be detected by the magnetic induction probe when they rotate close to the magnetic induction probe, and the magnetic induction probe transmits an electrical signal to the outside, which the monitoring device can convert into the speed of the hob through the algorithm. By monitoring the speed of the hob, it can be determined whether the hob has eccentric wear or is about to have eccentric wear, and whether it has been abnormally damaged, etc., so as to achieve the purpose of preventing the working condition from becoming difficult. Specifically, in this solution, a plurality of magnetic induction teeth 411 are provided, and the plurality of magnetic induction teeth 411 are arranged at intervals along the circumference of the moving ring 4 to ensure monitoring stability and improve monitoring accuracy.

[0053] In order to better understand the present invention, the following Figures 1 to 9 The technical solution of the utility model is described in detail:

[0054] During assembly, the probe head 6 is screwed into the channel 3a from the inner side of the end cover 3 until the limit step 64 is stopped by the stop step 31, and then the locking nut 7 is screwed on the second threaded section 62, so that the probe head 6 and the end cover 3 can be more tightly connected. Then the dynamic ring 4 is installed on the open end of the cutter hub 2, and the static ring 5 is installed on the inner side of the end cover 3, and then the end cover 3 is covered on the open end of the cutter hub 2.

[0055] In this way, when the hob mechanism 100 is working, the moving ring 4 rotates synchronously with the cutter hub 2, and the detection head 6 remains stationary with the end cover 3, so that the rotation speed of the cutter hub 2 can be obtained by the detection head 6 measuring the speed of the trigger part 41, so as to determine whether the hob is abnormal by monitoring the hob rotation speed. In addition, the cooperation of the moving ring 4 and the static ring 5 can improve the sealing performance of the hob mechanism 100, and avoid the speed measurement component occupying too much space in the cutter hub 2, thereby improving the space utilization rate of the inner cavity of the cutter hub 2, and at the same time, the structure is simple and cost-saving.

[0056] In addition, the utility model further provides a shield machine cutter box, which includes the above-mentioned rolling cutter mechanism 100. It should be noted that the detailed structure of the rolling cutter mechanism 100 of the shield machine cutter box can refer to the above-mentioned embodiment of the rolling cutter mechanism 100, which will not be repeated here; since the above-mentioned rolling cutter mechanism 100 is used in the shield machine cutter box of the utility model, the embodiment of the shield machine cutter box of the utility model includes all technical solutions of all embodiments of the above-mentioned rolling cutter mechanism 100, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0057] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A hob mechanism, characterized in that: include: The hob comprises a core shaft and a cutter hub, wherein the cutter hub is hollow inside and open at both ends, and the cutter hub is rotatably sleeved on the core shaft; A sealing assembly, comprising an end cover, a dynamic ring and a static ring, wherein the end cover is disposed at the open end of the cutter hub and fixed to the core shaft, and is provided with a passage communicating with the inner cavity of the cutter hub, the dynamic ring is installed in the cutter hub and is provided with a triggering portion capable of extending into the passage, and the static ring is installed on the inner side of the end cover and abuts against the dynamic ring to form a floating oil seal; and A detection head is installed in the channel and is used to monitor the rotation speed of the trigger part.

2. The hob mechanism according to claim 1, characterized in that: The inner wall of the channel is provided with an internal thread, the outer wall of the detection head is provided with an external thread, and the detection head is screwed in the channel.

3. The hob mechanism according to claim 2, characterized in that: The detection head is provided with a first thread segment and a second thread segment in sequence along a direction away from the tool hub, the first thread segment is screwed in the channel, and the second thread segment extends out of the channel; The hob mechanism also includes a locking nut, which is threadedly arranged on the second threaded section.

4. The hob mechanism according to claim 3, characterized in that: The first thread segment and the second thread segment have the same thread direction.

5. The hob mechanism according to claim 3, characterized in that: The detection head is provided with a sealing groove between the first thread segment and the second thread segment, and the hob mechanism further comprises a probe sealing ring, and the probe sealing ring is placed in the sealing groove; and / or, The inner wall of the channel is provided with a stopping step, and the detection head is further provided with a limiting step between the first thread segment and the second thread segment, and the limiting step is stopped at a side of the stopping step close to the tool hub.

6. The hob mechanism according to claim 1, characterized in that: The dynamic ring comprises a dynamic floating seal seat, a dynamic rubber ring and a dynamic floating seal ring. The dynamic floating seal seat is installed in the cutter hub and is adjacent to the end cover. The dynamic floating seal ring is installed at intervals on the inner side of the dynamic floating seal seat to form a dynamic sealing gap with the dynamic floating seal seat. The dynamic rubber ring is installed in the dynamic sealing gap. Wherein, the trigger part is arranged on the inner wall of the dynamic floating sealing ring.

7. The hob mechanism according to claim 6, characterized in that: A static floating seal seat is protruded on the inner side of the end cover toward the inner cavity of the cutter hub. The static ring includes a static rubber ring and a static floating seal ring. The static floating seal ring is installed on the inner side of the static floating seal seat at intervals to form a static sealing gap between the static floating seal seat and the static rubber ring is installed in the static sealing gap.

8. The hob mechanism according to claim 1, characterized in that: The triggering part is a magnetic induction tooth arranged on the inner wall of the moving ring, and the magnetic induction tooth can fall on the axial direction of the channel during the rotation stroke of the moving ring and extend into the channel; The detection head is a magnetic induction probe, which is triggered when the magnetic induction tooth falls in the axial direction of the channel and outputs an electrical signal.

9. The hob mechanism according to claim 8, characterized in that: There are a plurality of magnetic induction teeth, and the plurality of magnetic induction teeth are arranged at intervals along the circumference of the moving ring.

10. A shield machine tool box, characterized in that: It comprises a hob mechanism as described in any one of claims 1-9.

Images