CN216922131U

CN216922131U - Hob locking structure

Info

Publication number: CN216922131U
Application number: CN202220714205.6U
Authority: CN
Inventors: 马赛; 喻中孝; 张世伟; 刘点点; 夏亚明; 孟艺敏; 马少奇; 陈维
Original assignee: China Railway Engineering Equipment Group Co Ltd CREG
Current assignee: China Railway Engineering Equipment Group Co Ltd CREG
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2022-07-08
Anticipated expiration: 2032-03-30

Abstract

The utility model discloses a hob locking structure, which comprises a cutter shaft arranged on a cutter box, wherein the cutter shaft is assembled with a cutter body through a bearing, end covers positioned at two sides of the cutter body are arranged on the cutter shaft, and a detachable first circumferential locking mechanism is arranged between the cutter shaft and the cutter box; the end cover is in circumferential limit fit with the cutter shaft, and a detachable second circumferential locking mechanism is arranged between the end cover and the cutter box; the first circumferential locking mechanism and the second circumferential locking mechanism are locked simultaneously; or one of the first circumferential locking mechanism and the second circumferential locking mechanism locks, and when the locked one locking mechanism fails, the other locking mechanism locks. The utility model can lock two locking mechanisms simultaneously, can also lock by one locking mechanism firstly, when the locking mechanism fails, the other locking mechanism can be adopted for continuous use without replacing the cutter box and the matched fixing piece, thereby greatly reducing the influence on the shield construction progress and avoiding the extra cost caused by purchasing the cutter box again.

Description

Hob locking structure

Technical Field

The utility model relates to the technical field of hobs, in particular to a hob locking structure.

Background

The hob is usually fixed with a hob box structure in a certain mode as a cutter of the tunnel boring machine, and the hob box is often damaged in different degrees in the boring process of the tunnel boring machine, so that the fixation of the hob is influenced, the hob can fall off in serious cases, and the replacement and repair difficulty of the hob box is high, and the period is long.

In the prior art, the most common installation method of the hob is as follows: the hob cutter shaft is clamped in a C-shaped block, the C-shaped block is placed in a groove in the front face of a side plate of the hob box, then the inclined plane of the fixture block is pressed on the inclined plane of the cutter shaft, the fixture block and the hob shaft are interacted by pre-tightening a tension bolt penetrating through the fixture block, and the hob is fixed in the hob box.

The utility model discloses a telescopic side-rolling knife box, which is disclosed in Chinese patent application with application publication number of CN 106285707A and application publication number of 2017.01.04, and discloses a basic mechanism for locking a knife shaft through a C-shaped block, a wedge-shaped block and a bolt. When the hob is used, the hob installation mode is influenced by the working environment, the front structure of the hob box, the C-shaped block and the like are frequently damaged, the hob installation mode is invalid when the hob is serious, only the hob box structural part can be replaced, and the continuous tunneling of the shield machine is seriously influenced.

Through the retrieval, current grant bulletin date is 2012.02.08, chinese utility model patent that grant bulletin number is CN202140095U discloses a hobbing cutter and cylindrical sword box's mounting structure with arc end cover, including hobbing cutter, end cover and sword box, the end cover is installed in the hobbing cutter both sides, and the end cover is that the cross section is convex cylinder, and the slant is opened in end cover upper end both sides has fixed terminal surface, and the lower extreme slant is upwards opened has the chamfer, and the end cover is pressed close to hobbing cutter cutting edge one side and is provided with the boss, and the sword box is the cylinder, and the centre is opened has the through-hole, and the inside angular groove that has opened of through-hole upper and lower extreme both sides has the rectangle carrier block, the rectangle carrier block passes through the latch segment locking in the angular groove.

Above-mentioned utility model's among the technical scheme hobbing cutter subassembly through its end cover locking in the cutter box, though changed the locking structure of hobbing cutter, nevertheless receive operational environment to influence, cutter box front structure and end cover still exist and take place the risk of damaging, also will cause the hobbing cutter mounting form to become invalid when serious, also can only change the cutter box structure, seriously influence the shield structure machine and continue to tunnel.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the background technology, the utility model provides a hob locking structure, which solves the technical problems of more replaced parts and low efficiency when the hob locking structure is invalid.

The technical scheme of the application is realized as follows: a hobbing cutter locking structure comprises a cutter shaft arranged on a cutter box, wherein the cutter shaft is assembled with the cutter body through a bearing, end covers positioned on two sides of the cutter body are arranged on the cutter shaft, and a detachable first circumferential locking mechanism is arranged between the cutter shaft and the cutter box; the end cover is in circumferential limit fit with the cutter shaft, and a detachable second circumferential locking mechanism is arranged between the end cover and the cutter box; the first circumferential locking mechanism and the second circumferential locking mechanism are locked simultaneously; or one of the first circumferential locking mechanism and the second circumferential locking mechanism locks, and when the locked one locking mechanism fails, the other locking mechanism locks. The locking mechanism is designed between the cutter shaft and the cutter box and between the end cover and the cutter box respectively, so that two locking mechanisms can be locked simultaneously, the locking mechanism can be used for locking at first, when the locking mechanism fails, the other locking mechanism can be adopted, the cutter box can be continuously used, the cutter box and the matched fixing piece are not required to be replaced, the influence on the shield construction progress is greatly reduced, and extra cost caused by the purchase of the cutter box is avoided.

Furthermore, first circumferential locking mechanism includes spacing face of non-convex arbor circumference and joint type piece, the spacing face setting of arbor circumference is at the position that the end cover was stretched out to the arbor, joint type piece and the spacing face joint cooperation of arbor circumference, joint type piece pass through first bolt or screw and are connected with the knife case, and then realize relative positioning between arbor and the knife case.

Furthermore, the spacing face of arbor circumference includes arbor vertical face, the horizontal face of arbor and the arbor wedge face of arranging along the arbor global, the arbor wedge face is located the outside of arbor and is located the opposite side of arbor vertical face, joint type piece includes C type piece and wedge, C type piece and arbor vertical face and the horizontal cooperation of face joint of arbor, wedge and the cooperation of arbor wedge crimping.

Or the cutter shaft circumferential limiting surface comprises two cutter shaft wedge surfaces which are opposite to each other in the left-right direction and are both positioned on the outer side of the cutter shaft, and the clamping type block comprises two wedge blocks which are respectively in compression joint fit with the two cutter shaft wedge surfaces; or the clamping-connection type block comprises a wedge-shaped block and a wedge-shaped positioning surface arranged on the cutter box, one cutter shaft wedge-shaped surface is in compression joint fit with the wedge-shaped block, and the other cutter shaft wedge-shaped surface is in compression joint fit with the wedge-shaped positioning surface.

Or the circumferential limiting surface of the cutter shaft comprises a cutter shaft wedge surface and a cutter shaft positioning plane, the cutter shaft wedge surface is positioned on the outer side of the cutter shaft, the clamping-connection type block comprises a wedge block and a plane positioning block, the wedge block is in compression connection with the cutter shaft wedge surface, and the plane positioning block is in compression connection with the cutter shaft positioning plane; or the clamping-connection type block comprises a wedge-shaped block and a cutter box positioning plane arranged on the cutter box, one cutter shaft wedge-shaped surface is in compression joint fit with the wedge-shaped block, and the other cutter shaft wedge-shaped surface is in compression joint fit with the cutter box positioning plane.

Or the cutter shaft and the cutter box are provided with corresponding screw holes, and the cutter shaft is locked with the cutter box through bolts or screws matched with the screw holes.

Further, the second circumferential locking mechanism comprises a circumferential limiting hole arranged on the end cover and a cutter shaft circumferential clamping surface arranged on the cutter shaft, the circumferential limiting hole is in clamping fit with the circumferential limiting surface of the cutter shaft, an end cover circumferential limiting surface is arranged on the end cover and is arranged on one side of the working surface deviating from the cutter body, an end cover limiting groove in clamping fit with the circumferential limiting surface of the end cover is arranged on the cutter box, and the cutter box is connected with the end cover through a second bolt or a screw.

Furthermore, the end cover circumferential limiting surfaces comprise two end cover wedge surfaces which are opposite left and right, the end cover limiting clamping grooves are V-shaped, and the end covers are clamped in the V-shaped end cover limiting clamping grooves through the end cover wedge surfaces.

Furthermore, an end cover plane is arranged between the two end cover wedge-shaped surfaces, the end cover limiting clamping groove is in a U shape with a right-angled corner, and the end cover is clamped in the U-shaped end cover limiting clamping groove through the end cover wedge-shaped surfaces, so that the defect that stress concentration is generated due to the fact that the two end cover wedge-shaped surfaces are adjacent to each other is overcome.

Or, the end cover circumferential limiting surface comprises an uneven positioning surface, which can be a sine wave surface, a rectangular wave surface, a sawtooth surface, a discrete recess or a discrete protrusion, and only needs to realize circumferential limiting.

Or the circumferential limiting surface of the end cover is U-shaped or arc-shaped.

Compared with the prior art, the utility model has the beneficial effects that:

by adopting the technical scheme of the utility model, when the common locking form of the hob fails, the hob can be installed in another locking form and can be used continuously without replacing the hob box and the matched fixing piece, thereby greatly reducing the influence on the shield construction progress and avoiding the extra cost caused by purchasing the hob box again. The utility model improves the form of the common hob locking mechanism, provides two types of locking mechanisms, the two types of locking mechanisms can be used simultaneously or sequentially, and the second type of locking mechanism can be used after the first type of locking mechanism fails. When the two locking mechanisms are used successively, the hob can be installed on the hob box in a conventional locking mode, and in the tunneling process, when the hob box structure is damaged and the installation mode of the hob fails, the hob can be installed on the structure, which is not easy to damage, of the hob box in another locking mode under the condition that the hob box is not replaced, so that the replacement of the hob box is avoided.

Drawings

In order to illustrate the embodiments of the utility model more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, it being apparent that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be derived from those drawings by a person skilled in the art without inventive effort.

FIG. 1 is an isometric view of the hob assembly of example 2;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a view taken along the line A in FIG. 2;

FIG. 4 is a sectional view of the first circumferential locking mechanism in embodiment 2;

FIG. 5 is a sectional view of a second circumferential locking mechanism in embodiment 2;

FIG. 6 is a sectional view of a second circumferential locking mechanism in embodiment 3;

reference numbers in the figures:

1-cutter shaft, 11-cutter shaft vertical surface, 12-cutter shaft transverse surface, 13-cutter shaft wedge surface,

2-end cover, 21-circumferential limiting hole, 22-end cover wedge surface, 23-end cover plane,

3-cutter hub, 4-cutter ring, 5-bearing, 61-C type block, 62-wedge-shaped block, 7-second bolt, 8-cutter box, 91-short bolt, 92-long bolt and 10-tensioning block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

Embodiment 1, a locking structure of a hob, as shown in fig. 1 to fig. 3, includes a cutter shaft 1 disposed on a hob box, the cutter shaft 1 is assembled with a cutter body through a bearing 5, and the cutter body can rotate relative to the cutter shaft 1 through the action of the bearing 5. The cutter body includes the sword hub 3 that links to each other with bearing 5, sets up cutter ring 4 on the sword hub 3, set up the end cover 2 that is located the cutter body both sides on the arbor 1, end cover 2 protects 3 inner structure of sword hub.

As shown in fig. 1 to 3, the arbor 1 is not assembled with the tool box in order to show the arbor 1 and the end cap 2. A first detachable circumferential locking mechanism is arranged between the cutter shaft 1 and the cutter box. The end cover 2 is in circumferential limit fit with the cutter shaft 1, namely the end cover 2 and the cutter shaft 1 are relatively fixed in the circumferential direction, and a detachable second circumferential locking mechanism is arranged between the end cover 2 and the cutter box 8. As for the specific structures of the first circumferential locking mechanism and the second circumferential locking mechanism, the specific structures and models can be selected according to the specific structures and models of the cutter shaft 1, the end cover 2 and the cutter box, and the specific structures and models can be a mechanism with a press block matched with a bolt or a mechanism with a clamp block matched with a bolt as long as the locking between the cutter shaft 1 and the box body and between the end cover 2 and the cutter box can be realized.

When the locking mechanism is used, the first circumferential locking mechanism and the second circumferential locking mechanism are locked simultaneously, and by adopting the two locking mechanisms simultaneously, the use and the use of the locking effect can be prolonged, and when the locking mechanism fails, one locking mechanism can be directly replaced or the two locking mechanisms can be replaced simultaneously. Or one of the first circumferential locking mechanism and the second circumferential locking mechanism locks, and when one locking mechanism of the first circumferential locking mechanism and the second circumferential locking mechanism fails, the other locking mechanism is directly locked.

A locking mechanism is designed between the cutter shaft 1 and the cutter box and between the end cover 2 and the cutter box respectively, so that two locking mechanisms can be locked simultaneously, one locking mechanism can be used for locking at first, when the locking mechanism fails, the other locking mechanism can be adopted, the cutter box can be continuously used, the cutter box and a matched fixing part are not required to be replaced, the influence on the shield construction progress is greatly reduced, and extra cost caused by the re-purchase of the cutter box is avoided.

Embodiment 2, a hobbing cutter locking structure, as shown in fig. 4, first circumferential locking mechanism includes spacing face of non-circular arc arbor circumference and joint type piece, the spacing face setting of arbor circumference is at the position that end cover 2 is stretched out to arbor 1, joint type piece and the spacing cooperation of face joint of arbor circumference, joint type piece are connected with knife case 8 through first bolt or screw, and then realize relative positioning between arbor 1 and the knife case 5.

Specifically, the cutter shaft circumferential limiting surface comprises a cutter shaft vertical surface 11, a cutter shaft transverse surface 12 and a cutter shaft wedge surface 13 which are arranged along the circumferential surface of the cutter shaft 1. The knife shaft wedge surface 13 is positioned at the outer side of the knife shaft 1 and at the opposite side of the knife shaft vertical surface 11. The clamping type block comprises a C-shaped block 61 and a wedge-shaped block 62, the C-shaped block 61 is in clamping fit with the vertical surface 11 and the transverse surface 12 of the cutter shaft, and the wedge-shaped block 62 is in compression fit with the wedge-shaped surface 13 of the cutter shaft.

The first bolts comprise short bolts 91 and long bolts 92, the short bolts 91 penetrate through the knife box 8 to be connected with the C-shaped blocks 61, and the long bolts 92 penetrate through the tensioning blocks 10 located on the rear side of the knife box 8 to be connected with the wedge-shaped blocks 62 on the outer side of the knife box 8. In addition, in order to further ensure the reliability of locking, the short bolt 91 and the long bolt 92 are locked by a lock nut.

As shown in fig. 5, the second circumferential locking mechanism includes a circumferential limiting hole 21 formed in the end cover 2 and a cutter shaft circumferential engaging surface formed on the cutter shaft 1, and the circumferential limiting hole 21 is engaged with the cutter shaft circumferential limiting surface to fix the cutter shaft 1 and the end cover 2 circumferentially relatively. The end cover 2 is provided with an end cover circumferential limiting surface, and the end cover circumferential limiting surface is arranged on one side of the working surface deviating from the cutter body, so that the cutter body is convenient to detach and replace and install. Be provided with on the tool box 8 with the spacing face joint complex end cover spacing groove of end cover circumference, pass through second bolt 7 or screwed connection between tool box 8 and the end cover 2, and then realize tool box 8 and arbor 1's circumference relatively fixed.

Specifically, the end cover circumferential limiting surface comprises two end cover wedge-shaped surfaces 22 opposite to each other left and right, an end cover plane 23 is arranged between the two end cover wedge-shaped surfaces 22, and the end cover limiting clamping groove is in a U shape with a right angle at a folded angle. The end cover 2 is clamped in the U-shaped end cover limiting clamping groove through the end cover wedge-shaped surface 22, and the defect that stress concentration is generated due to the fact that the two end cover wedge-shaped surfaces 22 are adjacent to each other is avoided.

Further, the second bolt 7 penetrates through the end cover limiting groove to be connected with the end cover 2.

The other structure of this embodiment is the same as embodiment 1.

Embodiment 3, a hob locking structure, which is different from embodiment 2 in that: as shown in fig. 6, the circumferential limiting surface of the end cap is arc-shaped, and the embodiment in fig. 6 is arc-shaped, and in specific implementation, a non-circular arc may be adopted, or a U-shape may be adopted.

The other structure of this embodiment is the same as embodiment 2.

Embodiment 4, a hob locking structure, differs from

embodiments

2 and 3 in that: the circumferential limiting surface of the end cover comprises an uneven positioning surface, which can be a sine wave surface, a rectangular wave surface, a sawtooth surface, a discrete recess or a discrete protrusion, and the circumferential limiting can be realized.

Embodiment 5, a hob locking structure, which differs from embodiments 2-4 in that: the end cover circumferential limiting surfaces comprise two end cover wedge-shaped surfaces 22 which are opposite left and right, the two end cover wedge-shaped surfaces 22 are arranged in an abutting mode, the end cover limiting clamping groove is V-shaped, and the end cover 2 is clamped in the V-shaped end cover limiting clamping groove through the end cover wedge-shaped surfaces 22.

Embodiment 6, a hob locking structure, which differs from embodiments 2-5 in that: the spacing face of arbor circumference includes two arbor wedge faces, and relative and all lie in the outside of arbor 1 about two arbor wedge faces, joint type piece includes two wedges, two wedges respectively with two arbor wedge face crimping cooperations, two wedges are connected with knife case 8 through first bolt or screw respectively.

Or the clamping-connection type block comprises a wedge-shaped block and a wedge-shaped positioning surface arranged on the knife box 8, one knife shaft wedge-shaped surface is in compression joint fit with the wedge-shaped block, the other knife shaft wedge-shaped surface is in compression joint fit with the wedge-shaped positioning surface, and the wedge-shaped block is connected with the knife box 8 through a first bolt or a screw.

Embodiment 7, a hob locking structure, differs from embodiments 2-6 in that: the spacing face of arbor circumference includes an arbor wedge face and an arbor locating plane, and the arbor wedge face is located the outside of arbor 1, joint type piece includes a wedge and a plane locating piece, wedge and the cooperation of arbor wedge face crimping, plane locating piece and the cooperation of arbor locating plane crimping. The wedge-shaped block and the plane positioning block are respectively connected with the knife box 8 through a first bolt or a screw.

Or the clamping-connection type block comprises a wedge-shaped block and a cutter box positioning plane arranged on the cutter box 8, one cutter shaft wedge-shaped surface is in compression joint fit with the wedge-shaped block, the other cutter shaft wedge-shaped surface is in compression joint fit with the cutter box positioning plane, and the wedge-shaped block is connected with the cutter box 8 through a first bolt or a screw.

Embodiment 8, a hob locking structure, which differs from embodiments 2-7 in that: the cutter shaft 1 and the cutter box 8 are provided with corresponding screw holes, and the cutter shaft 1 is locked with the cutter box 8 through bolts or screws matched with the screw holes.

Nothing in this specification is intended to be exhaustive of all conventional and well known techniques.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a hobbing cutter locking structure, is including setting up arbor (1) on knife case (8), and arbor (1) passes through bearing (5) assembly cutter body, sets up end cover (2) that are located the cutter body both sides on arbor (1), its characterized in that: a first detachable circumferential locking mechanism is arranged between the cutter shaft (1) and the cutter box (8); the end cover (2) is in circumferential limit fit with the cutter shaft (1), and a detachable second circumferential locking mechanism is arranged between the end cover (2) and the cutter box (8); the first circumferential locking mechanism and the second circumferential locking mechanism are locked simultaneously; or one of the first circumferential locking mechanism and the second circumferential locking mechanism locks, and when the locked one locking mechanism fails, the other locking mechanism locks.

2. The hob locking structure according to claim 1, wherein: the first circumferential locking mechanism comprises a non-circular-arc-shaped cutter shaft circumferential limiting surface and a clamping type block, the cutter shaft circumferential limiting surface is arranged at the position, extending out of the end cover (2), of the cutter shaft (1), the clamping type block is in clamping fit with the cutter shaft circumferential limiting surface, and the clamping type block is connected with the cutter box (8) through a first bolt or a screw.

3. The hob locking structure according to claim 2, wherein: spacing face of arbor circumference includes vertical face of arbor (11), the horizontal face of arbor (12) and arbor wedge (13) of arranging along arbor (1) global, arbor wedge (13) are located the outside of arbor (1) and are located the opposite side of arbor vertical face (11), joint type piece includes C type piece (61) and wedge (62), C type piece (61) and arbor vertical face (11) and the horizontal face of arbor (12) joint cooperation, wedge (62) and arbor wedge (13) crimping cooperation.

4. The hob locking structure according to claim 2, wherein: the cutter shaft circumferential limiting surface comprises two cutter shaft wedge surfaces which are opposite to each other left and right and are positioned on the outer side of the cutter shaft (1), the clamping type block comprises two wedge blocks, and the two wedge blocks are respectively in compression joint fit with the two cutter shaft wedge surfaces; or the clamping-connection type block comprises a wedge-shaped block and a wedge-shaped positioning surface arranged on the knife box (8), one knife shaft wedge-shaped surface is matched with the wedge-shaped block in a compression joint mode, and the other knife shaft wedge-shaped surface is matched with the wedge-shaped positioning surface in a compression joint mode.

5. The hob locking structure according to claim 2, wherein: the cutter shaft circumferential limiting surface comprises a cutter shaft wedge surface and a cutter shaft positioning plane, the cutter shaft wedge surface is positioned on the outer side of the cutter shaft (1), the clamping type block comprises a wedge block and a plane positioning block, the wedge block is in compression joint fit with the cutter shaft wedge surface, and the plane positioning block is in compression joint fit with the cutter shaft positioning plane; or the clamping-connection type block comprises a wedge-shaped block and a cutter box positioning plane arranged on the cutter box (8), one cutter shaft wedge-shaped surface is in compression joint fit with the wedge-shaped block, and the other cutter shaft wedge-shaped surface is in compression joint fit with the cutter box positioning plane.

6. The hob locking structure according to claim 2, wherein: the cutter shaft (1) and the cutter box (8) are provided with corresponding screw holes, and the cutter shaft (1) is locked with the cutter box (8) through bolts or screws matched with the screw holes.

7. The hob locking structure according to any one of claims 1 to 6, wherein: the second circumferential locking mechanism comprises a circumferential limiting hole (21) formed in the end cover (2) and a cutter shaft circumferential clamping surface arranged on the cutter shaft (1), the circumferential limiting hole (21) is matched with the cutter shaft circumferential limiting surface in a clamping mode, an end cover circumferential limiting surface is arranged on the end cover (2), the end cover circumferential limiting surface is arranged on one side of a working surface deviating from the cutter body, an end cover limiting groove matched with the end cover circumferential limiting surface in a clamping mode is arranged on the cutter box (8), and the cutter box (8) is connected with the end cover (2) through a second bolt (7) or a screw.

8. The hob locking structure of claim 7, wherein: the end cover circumferential limiting surface comprises two end cover wedge surfaces (22) which are opposite left and right.

9. The hob locking structure according to claim 8, wherein: an end cover plane (23) is arranged between the two end cover wedge-shaped surfaces (22).

10. The hob locking structure according to claim 7, wherein: the circumferential limiting surface of the end cover is U-shaped or arc-shaped.

11. The hob locking structure according to claim 7, wherein: the end cover circumferential limiting surface comprises an uneven positioning surface.

12. The hob locking structure according to any one of claims 8 to 11, wherein: and the second bolt (7) penetrates through the end cover limiting groove to be connected with the end cover (2).