CN216974839U - Hob structure and shield tunneling machine cutter head with same - Google Patents

Abstract

The utility model provides a hob structure with a cutter head of a shield machine, wherein the hob structure comprises: installing a shaft; the bearing is rotatably arranged on the mounting shaft and comprises a first bearing and a second bearing which are separately arranged along the axial direction of the mounting shaft, and a first gap is formed between the first bearing and the second bearing; the hob assembly is arranged on the circumferential outer side of the bearing; the first end cover is arranged on the mounting shaft and covers the first end part of the first bearing; the second end cover is arranged on the mounting shaft and covers the second end part of the second bearing; wherein, be provided with first oil storage chamber between first end cover, first bearing and the hobbing cutter subassembly, be provided with the oil filler point with first oil storage chamber intercommunication on the first end cover. The technical scheme of the utility model can effectively solve the problem that the mounting shaft is easy to break in the related technology.

Description

Hob structure and shield tunneling machine cutter head with same

Technical Field

The utility model relates to the field of tunnel excavation, in particular to a cutter head of a shield machine with a hob structure.

Background

The hob structure is a main cutter for the shield machine to break rock, and under the action of thrust and torque of the cutter head, the hob structure revolves around the central shaft of the cutter head on one hand, and can also rotate around a self-mounted shaft on the other hand, and rock is crushed through the rolling and rolling action of the cutting edges on rock strata. At present, most of hobbing cutters for shield machines adopt rolling bearings, and when the hobbing cutters work for a long time under a high-temperature and high-pressure environment and are subjected to large impact vibration in the construction process, the conditions that bearing rollers and inner and outer rings are unevenly worn, fatigue pitting occurs on the surfaces of contact positions, and the like easily occur, so that the hobbing cutters are failed to rotate normally, and abnormal conditions such as eccentric wear are generated.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a cutter head of a shield machine with a hob structure, and aims to solve the problem that a mounting shaft of the hob structure in the related art is prone to fracture.

In order to achieve the above object, according to one aspect of the present invention, there is provided a hob structure including: installing a shaft; the bearing is rotatably arranged on the mounting shaft and comprises a first bearing and a second bearing which are separately arranged along the axial direction of the mounting shaft, and a first gap is formed between the first bearing and the second bearing; the hob assembly is arranged on the circumferential outer side of the bearing; the first end cover is arranged on the mounting shaft and covers the first end part of the first bearing; the second end cover is arranged on the mounting shaft and covers the second end part of the second bearing; wherein, be provided with first oil storage chamber between first end cover, first bearing and the hobbing cutter subassembly, be provided with the oil filler point with first oil storage chamber intercommunication on the first end cover.

Further, the first bearing is including the first bearing body of cover locating on the installation axle and set up in the first end plate of the first tip of first bearing body, and first end plate is located between hobbing cutter subassembly and the first end cover, forms first oil storage chamber between hobbing cutter subassembly, first end plate and the first end cover.

Further, the hob structure further comprises: and the first sealing element is sealed between the first end cover and the hobbing cutter assembly.

Further, the second bearing is located the epaxial second bearing body of installation and is set up in the second end plate of the second tip of second bearing body including the cover, and the second end plate is located between hobbing cutter subassembly and the second end cover, forms the second oil storage chamber between hobbing cutter subassembly, second end plate and the second end cover, is provided with the through-hole on the hobbing cutter subassembly, and the through-hole communicates first oil storage chamber and second oil storage chamber.

Further, the hob structure further comprises: and the second sealing element is sealed between the second end cover and the hobbing cutter assembly.

Further, be provided with the first oil groove of leading on the inner wall of first bearing body, be provided with the second on the first end plate and lead the oil groove, the second leads the first oil storage chamber of oil groove intercommunication and the first oil groove of leading.

Further, the first oil guide groove is a spiral groove extending in the axial direction of the first bearing.

Further, the hobbing cutter subassembly includes the connecting sleeve that sets up in the bearing circumference outside and sets up to the tool bit that the connecting sleeve circumference outside was outside.

Further, the distance of the first gap is between 1mm and 5 mm; and/or a second gap is arranged between the bearing and the mounting shaft, and the distance of the second gap is greater than 0mm and less than 0.8 mm.

According to another aspect of the present invention, there is provided a cutter head of a shield tunneling machine, including: the cutter head body is provided with a plurality of mounting holes; the hobbing cutter structure is arranged in the mounting hole and is the hobbing cutter structure.

By applying the technical scheme, the bearing comprises a first bearing and a second bearing which are respectively sleeved outside an installation shaft, the first bearing and the second bearing can rotate relative to the installation shaft, the first bearing and the second bearing are provided with hobbing cutter assemblies, and the hobbing cutter assemblies and the first bearing and the second bearing synchronously rotate. Be provided with first clearance between first bearing and the second bearing, when pouring into lubricating oil to the oiling hole in, lubricating oil can get into first oil storage intracavity, and enter into in the first clearance from the fitting gap between first bearing and the hobbing cutter subassembly, the lubricating oil that gets into in the first clearance can be to diffusion between first bearing and the installation axle, also can be to diffusion between second bearing and the installation axle simultaneously, thereby play the effect of lubricated bearing and installation axle, greatly reduced the wearing and tearing between installation axle and the bearing, the life of hobbing cutter structure has been promoted. In addition, lubricating oil between the installation axle and the bearing also can play certain shock attenuation effect for the hobbing cutter structure is more reliable and more stable at the during operation.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 shows a cross-sectional view of an embodiment of a hob structure according to the present invention;

FIG. 2 shows an enlarged schematic view of the hob structure of FIG. 1 at A; and

fig. 3 shows a cross-sectional view of the bearing of the hob structure of fig. 1.

Wherein the figures include the following reference numerals:

1. a first gap; 2. a first oil storage chamber; 3. a second oil storage chamber; 10. installing a shaft; 20. a bearing; 30. a first bearing; 31. a first bearing body; 311. a first oil guide groove; 312. a first mounting through hole; 32. a first end plate; 321. a second oil guide groove; 40. a second bearing; 41. a second bearing body; 42. a second end plate; 50. a hob assembly; 51. connecting the shaft sleeve; 511. a through hole; 52. a cutter head; 60. a first end cap; 61. an oil filler hole; 70. a second end cap; 80. a first seal member; 90. a second seal.

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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1 and 2, the hob structure of the present embodiment includes: the mounting shaft 10, the bearing 20, the roller assembly 50, the first end cap 60, and the second end cap 70. The bearing 20 is rotatably arranged on the mounting shaft 10, the bearing 20 comprises a first bearing 30 and a second bearing 40 which are separately arranged along the axial direction of the mounting shaft 10, and a first gap 1 is formed between the first bearing 30 and the second bearing 40; a hob assembly 50 provided on the circumferential outer side of the bearing 20; the first end cap 60 is disposed on the mounting shaft 10 and covers the first end of the first bearing 30; the second end cap 70 is disposed on the mounting shaft 10 and covers the second end of the second bearing 40; wherein, be provided with first oil storage chamber 2 between first end cover 60, first bearing 30 and the hobbing cutter subassembly 50, be provided with on the first end cover 60 with the oil filler point 61 of first oil storage chamber 2 intercommunication.

Use the technical scheme of this embodiment, the bearing 20 of this application includes two parts, is first bearing 30 and second bearing 40 respectively, and first bearing 30 and second bearing 40 cover are established in the installation axle 10 outside, and first bearing 30 and second bearing 40 can rotate for installation axle 10, are provided with hobbing cutter subassembly 50 on first bearing 30 and the second bearing 40, and hobbing cutter subassembly 50 rotates with first bearing 30 and second bearing 40 synchronous. Be provided with first clearance 1 between first bearing 30 and the second bearing 40, when pouring into lubricating oil into oil filler point 61, lubricating oil can get into in the first oil storage chamber 2, and enter into in the first clearance 1 from the fit-up gap between first bearing 30 and hobbing cutter subassembly 50, lubricating oil that gets into in the first clearance 1 can be to diffusing between first bearing 30 and the installation axle 10, also can be to diffusing between second bearing 40 and the installation axle 10 simultaneously, thereby play lubricated bearing 20 and the effect of installing axle 10, greatly reduced the wearing and tearing between installation axle 10 and the bearing 20, the life of hobbing cutter structure has been promoted. In addition, lubricating oil between the mounting shaft 10 and the bearing 20 can also play a certain damping effect, so that the hob structure is more stable and reliable in operation.

As shown in fig. 1 and 2, in the present embodiment, the first bearing 30 includes a first bearing body 31 sleeved on the mounting shaft 10 and a first end plate 32 disposed at a first end of the first bearing body 31, the first end plate 32 is located between the roller cutter assembly 50 and the first end cover 60, and a first oil storage chamber 2 is formed between the roller cutter assembly 50, the first end plate 32 and the first end cover 60. In the above structure, the first end plate 32 abuts against the hob assembly 50 and is pressed by the first end cover 60, so that the installation strength of the whole hob structure is increased. A first oil storage cavity 2 is formed among the hob assembly 50, the first end plate 32 and the first end cover 60, lubricating oil firstly enters a gap between the first end plate 32 and the hob assembly 50 after entering the first oil storage cavity 2, then enters a gap between the hob assembly 50 and the first bearing body 31, finally enters the first gap 1, flows into the first bearing 30 and diffuses between the installation shaft 10 through the first gap 1, and meanwhile can flow between the second bearing 40 and the installation shaft 10. The structure is simple, and a storage structure of lubricating oil is convenient to form.

As shown in fig. 1 and 2, in the present embodiment, the roller cutter structure further includes a first seal 80, and the first seal 80 is sealed between the first end cap 60 and the roller cutter assembly 50. In the above configuration, the first seal 80 can seal the gap between the first end cap 60 and the hob assembly 50, so that the lubricating oil can flow only toward the bearing 20, thereby reducing the amount of loss of the lubricating oil.

As shown in fig. 1 and 2, in the present embodiment, the second bearing 40 includes a second bearing body 41 sleeved on the mounting shaft 10 and a second end plate 42 disposed at a second end of the second bearing body 41, the second end plate 42 is located between the hob assembly 50 and the second end cover 70, a second oil storage chamber 3 is formed between the hob assembly 50, the second end plate 42 and the second end cover 70, and the hob assembly 50 is provided with a through hole which communicates the first oil storage chamber 2 and the second oil storage chamber 3. In the above structure, the second end plate 42 abuts against the hob assembly 50 and is pressed by the second end cover 70, so that the installation strength of the whole hob structure is increased. A second oil storage cavity 3 is formed among the hob assembly 50, the second end plate 42 and the second end cover 70, lubricating oil firstly enters a gap between the second end plate 42 and the hob assembly 50 after entering the second oil storage cavity 3, then enters a gap between the hob assembly 50 and the second bearing body 41, finally enters the first gap 1, flows into the first bearing 30 and the mounting shaft 10 through the first gap 1 to be diffused, and simultaneously can flow between the second bearing 40 and the mounting shaft 10. In addition, first oil storage chamber 2 and second oil storage chamber 3 communicate through-hole 511, only need inject lubricating oil into first oil storage chamber 2 through the oiling hole when injecting lubricating oil, lubricating oil can get into second oil storage chamber 3 through-hole 511 in first oil storage chamber 2, needn't set up the oiling hole in addition on second end cover 70, practiced thrift the production step, also saved the maintenance and the maintenance time of hobbing cutter structure simultaneously.

As shown in fig. 1 and 2, in this embodiment, the roller cutter structure further includes a second seal 90, the second seal 90 being sealed between the second end cap 70 and the roller cutter assembly 50. In the above configuration, the second seal 90 can seal the gap between the second end cap 70 and the hob assembly 50, so that the lubricating oil can only flow toward the bearing 20, and the loss amount of the lubricating oil is reduced.

As shown in fig. 1 and 3, in the present embodiment, a first oil guide groove 311 is disposed on an inner wall of the first bearing body 31, a second oil guide groove 321 is disposed on the first end plate 32, and the second oil guide groove 321 communicates the first oil storage chamber 2 and the first oil guide groove 311. In the above-mentioned structure, the lubricating oil that gets into in the first oil storage chamber 2 can lead in oil groove 321 enters into first oil groove 311 through the second to further increase the lubricated oil mass that gets into between first bearing body 31 and the installation axle 10, promoted the lubricated effect between first bearing body 31 and the installation axle 10, further reduced the probability that installation axle 10 was worn and torn, promoted the life of hobbing cutter structure.

Further, as shown in fig. 3, in the present embodiment, the first oil guide groove 311 is a spiral groove extending in the axial direction of the first bearing 30. Above-mentioned structure can make lubricating oil evenly distribute between first bearing body 31 and installation axle 10, has promoted lubricating effect and the shock attenuation effect of lubricating oil, has further promoted the life of hobbing cutter structure.

The second bearing 40 has the same structure as the first bearing 30. A third oil guide groove is formed in the second bearing body 41 of the second bearing 40, and the third oil guide groove is a spiral groove. Be provided with the fourth on the second end plate 42 and lead the oil groove, get into the lubricating oil in the second oil storage chamber 3 and can follow the fourth and lead the oil groove and flow into the third and lead the oil groove in to further increase the lubricated oil mass that gets into between second bearing body 41 and the installation axle 10, promoted the lubricated effect between second bearing body 41 and the installation axle 10, further reduced the probability that installation axle 10 was worn and torn, promoted the life of hobbing cutter structure.

As shown in fig. 1, in the present embodiment, the hob assembly 50 includes a connecting sleeve 51 disposed circumferentially outside the bearing 20 and a cutter head 52 disposed circumferentially outside the connecting shaft. In the above structure, the hob 51 can extrude the soil layer in the rotation process of the cutterhead, thereby playing a role of soil crushing.

As shown in fig. 1, in the present embodiment, the distance of the first gap 1 is between 1mm and 5 mm. The structure enables the lubricating oil to enter the first gap 1 more easily, and therefore a better lubricating effect is achieved. Preferably, the distance of the first gap 1 may be 1mm, 2mm, 4mm or 5 mm.

As shown in fig. 1, in the present embodiment, a second gap is formed between the bearing 20 and the mounting shaft 10, and the distance of the second gap is greater than 0mm and less than 0.8 mm. In the structure, lubricating oil can form an oil film after entering the second gap, the oil film can play a role in lubrication and shock absorption, and the rotation stability between the bearing 20 and the mounting shaft 10 is further improved, so that the service life of the hob structure is prolonged.

In the present application, the lubricating oil has two oil passages in common and enters between the first bearing 30 and the mounting shaft 10. Taking the first bearing 30 as an example, the first oil path is: lubricating oil enters the first oil storage cavity 2 through the oil filling hole, enters a gap between the hob assembly 50 and the first end plate 32 through the first oil storage cavity 2, enters a gap between the hob assembly 50 and the first bearing body 31, enters the first gap 1 and finally enters a second gap between the first bearing 30 and the mounting shaft 10. The second oil path is as follows: the lubricating oil enters the first oil storage chamber 2 through the oil filler hole, sequentially enters the second oil guide groove 321 through the first oil storage chamber 2, and finally enters the second gap between the first bearing 30 and the mounting shaft 10 through the first oil guide groove 311. The oil path for the lubricating oil to enter between the second bearing 40 and the mounting shaft 10 is the same as the oil path for the lubricating oil to enter between the first bearing 30 and the mounting shaft 10, and the description thereof is omitted.

It should be noted that the first bearing body 31 is further provided with a plurality of first mounting through holes 312, and the mounting through holes are used for mounting an anti-wear structure, which may be made of graphite or other materials, for further reducing the friction between the first bearing body 31 and the mounting shaft 10. Correspondingly, a second mounting through hole for mounting the wear reducing structure is also provided on the second bearing body 41.

The application still provides a cutter head of shield constructs machine and includes: the cutter head body and the hobbing cutter structure. Wherein. The cutter head body is provided with a plurality of mounting holes; the hobbing cutter structure is arranged in the mounting hole and is the hobbing cutter structure. In the structure, the hob structure has the advantages of good stability and long service life, so the hob structure with the hob structure also has the advantages.

In the description of the present invention, it is to be understood that the directions or positional relationships indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the directions or positional relationships shown in the drawings, and are for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …", "above … …", "above … …", "above", and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may also be oriented 90 degrees or at other orientations and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. A hob structure, characterized in comprising:

a mounting shaft (10);

a bearing (20) rotatably disposed on the mounting shaft (10), the bearing (20) including a first bearing (30) and a second bearing (40) separately disposed in an axial direction of the mounting shaft (10), the first bearing (30) and the second bearing (40) having a first gap (1) therebetween;

a hob assembly (50) provided on the circumferential outer side of the bearing (20);

the first end cover (60) is arranged on the mounting shaft (10) and covers the first end part of the first bearing (30);

the second end cover (70) is arranged on the mounting shaft (10) and covers the second end part of the second bearing (40);

a first oil storage cavity (2) is formed among the first end cover (60), the first bearing (30) and the hob assembly (50), and an oil filling hole (61) communicated with the first oil storage cavity (2) is formed in the first end cover (60);

the first bearing (30) comprises a first bearing body (31) sleeved on the mounting shaft (10) and a first end plate (32) arranged at a first end part of the first bearing body (31), the first end plate (32) is positioned between the hob assembly (50) and the first end cover (60), and the first oil storage cavity (2) is formed among the hob assembly (50), the first end plate (32) and the first end cover (60);

be provided with first oil groove (311) of leading on the inner wall of first bearing body (31), be provided with the second on first end plate (32) and lead oil groove (321), oil groove (321) intercommunication is led to the second first oil storage chamber (2) with first oil groove (311) of leading, first oil groove (311) of leading is for following the helicla flute that the axial direction of first bearing (30) extends.

2. The hob structure of claim 1, wherein the hob structure further comprises:

a first seal (80), the first seal (80) sealing between the first end cap (60) and the roller cutter assembly (50).

3. The hob structure according to claim 1, characterized in that the second bearing (40) comprises a second bearing body (41) sleeved on the mounting shaft (10) and a second end plate (42) arranged at a second end of the second bearing body (41), the second end plate (42) is located between the hob assembly (50) and the second end cover (70), a second oil storage cavity (3) is formed between the hob assembly (50), the second end plate (42) and the second end cover (70), a through hole (511) is arranged on the hob assembly (50), and the through hole (511) communicates the first oil storage cavity (2) and the second oil storage cavity (3).

4. The hob structure of claim 3, further comprising:

a second seal (90), the second seal (90) sealing between the second end cap (70) and the roller cutter assembly (50).

5. The hob structure according to claim 3, characterized in that the hob assembly (50) comprises a connecting sleeve (51) arranged circumferentially outside the bearing (20) and a cutter head (52) arranged circumferentially outside the connecting sleeve (51).

6. The hob structure according to claim 1, characterized in, that the distance of the first gap (1) is between 1mm and 5 mm; and/or a second clearance is arranged between the bearing (20) and the mounting shaft (10), and the distance of the second clearance is more than 0mm and less than 0.8 mm.

7. A cutter head of a shield tunneling machine, comprising:

the cutter head body is provided with a plurality of mounting holes;

a hob structure provided in the mounting hole, characterized in that the hob structure is as claimed in any one of claims 1 to 6.

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