CN215332852U

CN215332852U - Novel pipe jacking hobbing cutter

Info

Publication number: CN215332852U
Application number: CN202120658602.1U
Authority: CN
Inventors: 凌锋; 黄雄
Original assignee: Hunan Hedun Geotechnical Engineering Equipment Co ltd
Current assignee: Hunan Hedun Geotechnical Engineering Equipment Co ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2021-12-28
Anticipated expiration: 2031-03-31

Abstract

The utility model relates to the technical field of tunnel excavation pipe jacking, and discloses a novel pipe jacking hobbing cutter. The hob is adopted in the pipe jacking construction, strong load can ensure that the hob is not worn eccentrically to the maximum extent, the tunneling stability is greatly improved, economic loss caused by eccentric wear shutdown of the hob is avoided, the first retainer and the second retainer can be quickly disassembled and assembled through the limiting assembly, the disassembling and assembling time of the first retainer and the second retainer is shortened, the first limiting ring and the second limiting ring on the two sides of the roller can also limit the roller, and the noise phenomenon caused by overlarge moving distance of the roller is prevented.

Description

Novel pipe jacking hobbing cutter

Technical Field

The utility model relates to the technical field of tunnel excavation pipe jacking, in particular to a novel pipe jacking hob.

Background

The existing 10-inch pipe-jacking hobbing cutter adopts two sets of 33127 single-row tapered roller bearings, and the tapered roller has the defects that: the larger the taper of the bearing is, the larger the axial load is, the smaller the radial load is, the larger the radial load of the bearing is, the smaller the taper is, the smaller the axial load is, which has fatal defects to the hobbing cutter with extremely large requirements for the axial and radial loads, the clearance of the conical roller bearing is difficult to adjust when the conical roller bearing is installed, the too tight starting torque is large, the hobbing cutter is easy to be rotated and eccentrically worn, the too loose bearing is easy to damage and cause the hobbing cutter to fail, the conical roller bearing has unavoidable axial component force when in use, particularly the bearing is easy to loosen when in heavy load, so the hobbing cutter fails, the service life of the shield hobbing cutter bearing is short, no matter the conical roller bearing with large taper or small taper is adopted, the requirements of the hobbing cutter with high loads in the axial direction and the radial direction are difficult to be met, the condition of blocking and eccentric wear of the hobbing cutter are caused when the bearing is overloaded, so the shield construction site generally has eccentrically worn and damaged hobbing cutters, many are caused by bearing overload damage, so not only bring direct economic loss for the building site, indirect shutdown loss is also very big to the cylindrical bearing holder dismouting on the current push pipe hobbing cutter is inconvenient, is difficult to carry on spacingly to roller both sides. Therefore, a person skilled in the art provides a new type of pipe-jacking hob to solve the problems mentioned in the above background art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel pipe jacking hob to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides a novel pipe jacking hobbing cutter, includes the arbor, first end cover has been cup jointed to outside one side of arbor, just the second end cover has been cup jointed to the outside opposite side of arbor, two sets of cylindrical bearing and two sets of planar bearing have still been cup jointed to the outside of arbor, first end cover with the cutter body has still been cup jointed to the outside of second end cover, floating seal is still installed to the inside of cutter body, cylindrical bearing comprises first holder, bearing outer lane, roller, bearing inner circle and second holder, the outside of bearing inner circle has been cup jointed the bearing outer lane, bearing inner circle with still install between the bearing outer lane the roller, install respectively the both sides of roller first holder with the second holder, spacing subassembly is all installed to the front and back both sides of roller, spacing subassembly includes fastening bolt, first spacing collar, First gyro wheel, support column, flexible post, second gyro wheel and second spacing collar, the outside activity of flexible post has cup jointed the support column, just the outside of flexible post has cup jointed through the bearing activity the second gyro wheel, the outside rigid coupling of second gyro wheel has the second spacing collar, the outside of support column has cup jointed through the bearing activity first gyro wheel, the outside rigid coupling of first gyro wheel has first spacing collar, the one end of support column runs through fastening bolt.

As a still further scheme of the utility model: one end of the fastening bolt penetrates through the first retainer and extends to the inside of the supporting column, and the fastening bolt is connected with the first retainer through threads.

As a still further scheme of the utility model: and a limiting plate is fixedly connected in the first roller, the fastening bolt penetrates through the limiting plate, and one end of the telescopic column is sleeved with one end of the fastening bolt in a threaded manner.

As a still further scheme of the utility model: one end of the supporting column is fixedly connected to the first retainer, and one end of the telescopic column is fixedly connected to the second retainer.

As a still further scheme of the utility model: the first idler wheel and the second idler wheel are attached to the outer portion of the roller and are in rolling connection with the roller, and the first idler wheel and the second idler wheel are equal in size.

As a still further scheme of the utility model: the first limiting ring is connected to one side wall of the roller in a rolling mode, the second limiting ring is connected to the other side wall of the roller in a rolling mode, and the first limiting ring and the second limiting ring are both of disc-shaped structures.

As a still further scheme of the utility model: the first retainer and the second retainer are equal in size, and the first retainer and the second retainer are divided oppositely.

As a still further scheme of the utility model: one end of the telescopic column abuts against the limiting plate, and the limiting plate is of a circular ring structure.

Compared with the prior art, the utility model has the beneficial effects that: the hob is adopted in the pipe jacking construction, strong load can maximally ensure that the hob is not worn eccentrically, the tunneling stability is greatly improved, economic loss caused by eccentric wear shutdown of the hob is avoided, the first retainer and the second retainer can be quickly disassembled and assembled through the limiting assembly, the disassembling and assembling time of the first retainer and the second retainer is shortened, the roller can be subjected to auxiliary sliding through the first roller and the second roller inside the roller, the roller can be limited through the first limiting ring and the second limiting ring on the two sides of the roller, the noise phenomenon caused by overlarge moving distance of the roller is prevented, meanwhile, the dislocation phenomenon of the roller can be prevented, and the normal use of the roller is ensured.

Drawings

FIG. 1 is a schematic structural view of a novel pipe jacking hob;

FIG. 2 is a cross-sectional view of a novel pipe jacking hob;

FIG. 3 is a schematic structural view of a cylindrical bearing in a novel pipe-jacking hob;

FIG. 4 is a schematic structural view of a novel pipe jacking hob middle limiting assembly;

fig. 5 is a schematic structural diagram of a limiting plate in the novel pipe jacking hob.

In the figure: 1. a cutter body; 2. a cutter shaft; 3. floating sealing; 4. a first end cap; 6. a flat bearing; 7. a cylindrical bearing; 8. a second end cap; 9. a first holder; 10. a bearing outer race; 11. a roller; 12. a bearing inner race; 13. a second holder; 14. fastening a bolt; 15. a first spacing collar; 16. a first roller; 17. a support pillar; 18. a telescopic column; 19. a second roller; 20. a second limit ring; 21. a limiting component; 22. and a limiting plate.

Detailed Description

Referring to fig. 1 to 5, in an embodiment of the present invention, a novel pipe-jacking hob includes a hob shaft 2, a first end cover 4 is sleeved on one side of an outer portion of the hob shaft 2, a second end cover 8 is sleeved on the other side of the outer portion of the hob shaft 2, two sets of cylindrical bearings 7 and two sets of plane bearings 6 are further sleeved on the outer portion of the hob shaft 2, a hob body 1 is further sleeved on the outer portions of the first end cover 4 and the second end cover 8, and a floating seal 3 is further installed inside the hob body 1.

In fig. 3, 4 and 5: the cylindrical bearing 7 consists of a first retainer 9, a bearing outer ring 10, a roller 11, a bearing inner ring 12 and a second retainer 13, the bearing outer ring 10 is sleeved outside the bearing inner ring 12, the roller 11 is further installed between the bearing inner ring 12 and the bearing outer ring 10, the first retainer 9 and the second retainer 13 are respectively installed on two sides of the roller 11, the limiting assemblies 21 are respectively installed on the front side and the rear side of the roller 11, each limiting assembly 21 comprises a fastening bolt 14, a first limiting ring 15, a first roller 16, a supporting column 17, a telescopic column 18, a second roller 19 and a second limiting ring 20, the supporting column 17 is movably sleeved outside the telescopic column 18, the second roller 19 is movably sleeved outside the telescopic column 18 through a bearing, the second limiting ring 20 is fixedly connected outside the second roller 19, the first roller 16 is movably sleeved outside the supporting column 17 through a bearing, the first limiting ring 15 is fixedly connected outside the first roller 16, a fastening bolt 14 penetrates through one end of a supporting column 17, one end of the fastening bolt 14 penetrates through a first holder 9 and extends to the inside of the supporting column 17, the fastening bolt 14 and the first holder 9 are connected through a thread, a limiting plate 22 is further fixedly connected inside a first roller 16, the fastening bolt 14 penetrates through the limiting plate 22, one end of a telescopic column 18 is sleeved on one end of the fastening bolt 14 through a thread, one end of the supporting column 17 is fixedly connected on the first holder 9, one end of the telescopic column 18 is fixedly connected on a second holder 13, the first roller 16 and the second roller 19 are both attached to the outside of the roller 11 and are in rolling connection with the roller 11, the first roller 16 and the second roller 19 are equal in size, the first limiting ring 15 is in rolling connection with one side wall of the roller 11, the second limiting ring 20 is in rolling connection with the other side wall of the roller 11, the first limiting ring 15 and the second limiting ring 20 are both in a disc-shaped structure, first holder 9 and second holder 13 are of equal size, first holder 9 and second holder 13 are the relative distribution, the one end of flexible post 18 is supported and is leaned on limiting plate 22, limiting plate 22 is the ring structure, can carry out quick assembly disassembly to first holder 9 and second holder 13 through spacing subassembly 21, the dismouting time of the two has been shortened, and can also play supplementary gliding purpose to roller 11 through its inside first gyro wheel 16 and second gyro wheel 19, first spacing collar 15 and second spacing collar 20 through roller 11 both sides can also be spacing to it, prevent the noise phenomenon that roller 11 removal interval too big caused, can also prevent roller 11 dislocation phenomenon from appearing simultaneously, the normal use of its self has been ensured.

The working principle of the utility model is as follows: a user firstly installs the roller 11 between the bearing inner ring 12 and the bearing outer ring 10, then installs the first retainer 9 and the second retainer 13 at two sides of the roller 11, inserts one end of the telescopic column 18 into the support column 17, and rotates the fastening bolt 14, and then slowly screws one end of the fastening bolt 14 into the telescopic column 18, at this time, the telescopic column 18 can be driven to move leftwards until the telescopic column abuts against the limit plate 22, at this time, the telescopic column 18 can be fixed in the support column 17, and at this time, the first roller 16 and the second roller 19 can be attached to the roller 11, at this time, the first limit ring 15 and the second limit ring 20 can be installed at two sides of the roller 11, and after the roller 11 rotates, the first roller 16 and the second roller 19 can also be driven to rotate, so the first retainer 9 and the second retainer 13 can be quickly disassembled and assembled through the limit component 21, the time for assembling and disassembling the roller and the roller is shortened, and the roller 11 can be used for assisting the sliding through the first roller 16 and the second roller 19 inside the roller, the first spacing ring 15 and the second spacing ring 20 on both sides of the roller 11 can also limit the roller, prevent the noise phenomenon caused by the overlarge moving distance of the roller 11, meanwhile, the dislocation phenomenon of the roller 11 can be prevented, the normal use of the roller is ensured, the utility model is characterized in that four sets of bearings, two sets of 81122 series plane bearings and two sets of full roller cylindrical roller bearings are arranged, the two sets of 81122 series plane bearings provide axial load for the hob, the two sets of full roller cylindrical roller bearings provide radial load, the axial load capacity is improved by 5 times compared with that of the tapered roller, the radial load is improved by 3 times, and the strong bearing capacity provides high stability and reliability for the hob.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.

Claims

1. The novel pipe jacking hob comprises a hob shaft (2) and is characterized in that a first end cover (4) is sleeved on one side of the outer portion of the hob shaft (2), a second end cover (8) is sleeved on the other side of the outer portion of the hob shaft (2), two sets of cylindrical bearings (7) and two sets of plane bearings (6) are further sleeved on the outer portion of the hob shaft (2), a hob body (1) is further sleeved on the outer portions of the first end cover (4) and the second end cover (8), a floating seal (3) is further installed inside the hob body (1), each cylindrical bearing (7) is composed of a first retainer (9), a bearing outer ring (10), a roller (11), a bearing inner ring (12) and a second retainer (13), the bearing outer ring (10) is sleeved on the outer portion of the bearing inner ring (12), and the roller (11) is further installed between the bearing inner ring (12) and the bearing outer ring (10), the first retainer (9) and the second retainer (13) are respectively installed on two sides of the roller (11), limiting assemblies (21) are installed on the front side and the rear side of the roller (11), each limiting assembly (21) comprises a fastening bolt (14), a first limiting ring (15), a first roller (16), a supporting column (17), a telescopic column (18), a second roller (19) and a second limiting ring (20), the supporting column (17) is movably sleeved outside the telescopic column (18), the second roller (19) is movably sleeved outside the telescopic column (18) through a bearing, the second limiting ring (20) is fixedly connected to the outer side of the second roller (19), the first roller (16) is movably sleeved outside the supporting column (17), and the first limiting ring (15) is fixedly connected to the outer side of the first roller (16), one end of the supporting column (17) penetrates through the fastening bolt (14).

2. A new pipe jacking hob according to claim 1, characterized in, that one end of the fastening bolt (14) extends through the first holder (9) and to the inside of the supporting column (17), the fastening bolt (14) and the first holder (9) being connected by a thread.

3. The novel pipe-jacking hob according to claim 1, wherein a limit plate (22) is further fixed inside the first roller (16), the fastening bolt (14) penetrates through the limit plate (22), and one end of the telescopic column (18) is in threaded sleeve connection with one end of the fastening bolt (14).

4. A new pipe jacking hob according to claim 1, characterized in, that one end of the supporting column (17) is fixed to the first holder (9) and one end of the telescopic column (18) is fixed to the second holder (13).

5. A new pipe-jacking hob according to claim 1, characterized in, that the first roller (16) and the second roller (19) are attached to the outside of the roller (11) and are in rolling connection therewith, the first roller (16) and the second roller (19) being of equal size.

6. The new pipe-jacking hob according to claim 1, characterized in that the first stop collar (15) is roll-connected to one side wall of the roller (11), the second stop collar (20) is roll-connected to the other side wall of the roller (11), and the first stop collar (15) and the second stop collar (20) are both disc-shaped structures.

7. A new pipe-jacking hob according to claim 1, characterized in, that the first cage (9) and the second cage (13) are of equal size, and the first cage (9) and the second cage (13) are oppositely arranged.

8. A new pipe-jacking hob according to claim 3, characterized in that one end of the telescopic post (18) abuts against the limiting plate (22), and the limiting plate (22) is a circular ring structure.