CN214944259U - Novel sliding bearing hob for shield machine - Google Patents

Abstract

The utility model provides a novel shield constructs machine slide bearing hobbing cutter, including the cutter body, the upper end cover, the lower extreme cover, the cutter ring, arbor and retaining ring, the cover is equipped with two slide bearings of relative distribution between cutter body and the arbor, be provided with chip storage groove and oil storage hole on the slide bearing, the both sides of cutter body are provided with floating oil seal, be provided with the logical oilhole that communicates with floating oil groove on the side of cutter body, be provided with the end cap hole that communicates with floating oil groove on the lower extreme cover, be provided with oily stifled in the end cap hole, be provided with O type circle between the terminal surface of upper end cover and the terminal surface of arbor, be provided with magnet between the inner wall of lower extreme cover and the outer wall of arbor. The utility model discloses slide bearing's inside and outside wall can establish the oil film with arbor and cutter body, and the continuity and the holding power of oil film are higher moreover, are favorable to obtaining higher bearing capacity, have effectively prolonged the actual life of hobbing cutter to be favorable to improving the tunnelling ability of shield structure machine, be fit for extensive the popularization.

Description

Novel sliding bearing hob for shield machine

Technical Field

The utility model belongs to the technical field of the shield constructs the machine, a cutter is used to the shield constructs the machine is related to, especially relate to a novel slide bearing hobbing cutter is used to the shield constructs machine.

Background

The shield tunneling machine is a special engineering machine for tunneling, integrates light, mechanical, electrical, hydraulic, sensing and information technologies, has the functions of excavating and cutting soil, conveying soil slag, assembling tunnel lining, measuring, guiding, correcting deviation and the like, relates to multiple subject technologies such as geology, construction, machinery, mechanics, hydraulic pressure, electrical, control, measurement and the like, is designed and manufactured in a 'body-measuring clothes-cutting' mode according to different geology, and has extremely high reliability requirement. The shield tunneling machine is widely used for tunnel engineering of subway, railway, highway, municipal administration, hydropower and the like. The hob is a vulnerable assembly part on a cutter head of the shield machine.

The slewing structure of present shield structure machine hobbing cutter, the tapered roller rolling bearing structure is adopted to the majority, because of the hobbing cutter operational environment is abominable, often work for a long time under high temperature, high pressure environment, receive great impact force in the work progress moreover, so bearing roller and interior outer lane production uneven wear appear easily, the easy emergence fatigue pitting of contact position surface loses efficacy, cause the bearing to rotate, the fracture even, and then lead to the unable normal gyration of hobbing cutter, abnormal conditions such as production eccentric wear have increased engineering cost.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the technical problem that foretell hobbing cutter exists, provide a reasonable in design, simple structure, stand wear and tear, job stabilization nature is good, life is longer and be favorable to improving the novel shield structure machine slide bearing hobbing cutter of tunnelling ability.

In order to achieve the above object, the utility model discloses a technical scheme do, the utility model provides a pair of novel shield constructs machine slide bearing hobbing cutter, including the cutter body, the both sides face of cutter body is provided with upper end cover and lower end cover respectively, all be provided with the bolt that is used for connecting the arbor on upper end cover and the lower end cover, the outside of cutter body is provided with the cutter ring, the inside of cutter body is provided with the arbor, the cutter ring is provided with the retaining ring with the link of cutter body, the cover is equipped with two slide bearings of relative distribution between cutter body and the arbor, slide bearing's inner wall is smooth round hole, slide bearing's outer wall and cutter body cooperation, slide bearing includes disc face and cylindrical surface, disc face is provided with a plurality of evenly distributed's chip storage groove in its one side with the cutter body complex, evenly be provided with a plurality of oil storage holes on the cylindrical surface, the upper end cover is provided with the internal diameter towards one side of cutter body and lower end cover and is greater than slide bearing towards one side of cutter body The floating oil groove, the inside of floating oil groove is provided with floating oil seal, be provided with a plurality of oil through holes with floating oil groove intercommunication on the side of cutter body, be provided with the end cap hole with floating oil groove intercommunication on the lower extreme cover, be provided with oil in the end cap hole and block up, be provided with O type circle between the terminal surface of upper end cover and the terminal surface of arbor, be provided with magnet between the inner wall of lower extreme cover and the outer wall of arbor.

Preferably, the oil through hole is biconical and the big end of the oil through hole is located on the central plane of the cutter body.

Preferably, a floating gap is provided between the cylindrical surfaces of the two sliding bearings.

Preferably, the axial length of the floating gap is 5-10 mm.

Preferably, the cutter body has an axial thickness at the outer portion of the oil passing hole larger than an axial width at the inner portion of the oil passing hole, and the cutter body is fitted to the sliding bearing at the inner portion of the oil passing hole.

Compared with the prior art, the utility model discloses an advantage lies in with positive effect:

1. the utility model provides a novel shield constructs machine slide bearing hobbing cutter, slide bearing's interior outer wall can establish the oil film with arbor and cutter body in order to obtain higher bearing capacity, solve in the hobbing cutter working process because of slewing bearing premature wear, bearing fracture gyration became invalid phenomenon cause hobbing cutter eccentric wear, even the problem that the arbor broke; the oil quantity balance effect among the oil through hole, the floating oil seal and the sliding bearing is high, and the oil film quality can be improved by the aid of the chip storage grooves in the sliding bearing, so that the oil film keeping effect is further improved. The device has the advantages of reasonable design, simple structure, wear resistance, good working stability, longer service life, and suitability for large-scale popularization, and is favorable for improving the tunneling capability of the shield tunneling machine.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a sectional view of a sliding bearing hob for a novel shield machine provided by an embodiment;

FIG. 2 is an isometric view of a plain bearing provided by an embodiment;

FIG. 3 is an enlarged schematic view of the structure A in FIG. 1 according to an exemplary embodiment;

FIG. 4 is an enlarged schematic view of the structure B in FIG. 1 according to an exemplary embodiment;

in the above figures, 1, a cutter body; 2. an upper end cover; 3. a lower end cover; 4. a bolt; 5. a cutter ring; 6. a cutter shaft; 7. a retainer ring; 8. a sliding bearing; 81. a disc surface; 82. a cylindrical surface; 83. a chip storage groove; 84. an oil storage hole; 9. a floating oil tank; 10. floating oil seal; 11. an oil through hole; 12. oil blocking; 13. an O-shaped ring; 14. a magnet; 15. a floating gap.

Detailed Description

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" used herein refer to the same directions as the drawings, and do not limit the structure.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the present invention is not limited to the limitations of the specific embodiments of the present disclosure.

Embodiment, as shown in fig. 1, fig. 2, fig. 3 and fig. 4, the utility model provides a novel shield constructs machine slide bearing hobbing cutter, including cutter body 1, the both sides face of cutter body 1 is provided with upper end cover 2 and lower end cover 3 respectively, all is provided with the bolt 4 that is used for connecting the arbor on upper end cover 2 and the lower end cover 3, and the outside of cutter body 1 is provided with cutter ring 5, and the inside of cutter body 1 is provided with arbor 6, and cutter ring 5 is provided with retaining ring 7 with the link of cutter body 1. Wherein, the upper end cap 2, the lower end cap 3, the cutter ring 5, the cutter shaft 6 and the retainer ring 7 are prior art, and this embodiment is not described herein again. The utility model discloses a key is that the inner structure of cutter body and the structure that is used for supporting cutter body and arbor are put forward the improvement to improve the holistic job stabilization nature of this device.

Specifically, the utility model is provided with two sliding bearings 8 which are oppositely distributed and sleeved between the cutter body 1 and the cutter shaft 6, the inner wall of the sliding bearing 8 is a smooth round hole, the outer wall of the sliding bearing 8 is matched with the cutter body 1, the sliding bearing 8 comprises a disc surface 81 and a cylindrical surface 82, the disc surface 81 is provided with a plurality of chip storage grooves 83 which are evenly distributed at the surface matched with the cutter body, a plurality of oil storage holes 84 are evenly arranged on the cylindrical surface 82, one side of the upper end cover 2 facing the cutter body and one side of the lower end cover 3 facing the cutter body are provided with a floating oil groove 9 with an inner diameter larger than that of the sliding bearing, a floating oil seal 10 is arranged inside the floating oil groove 9, a plurality of oil through holes 11 communicated with the floating oil groove are arranged on the side surface of the cutter body 1, a cutter shaft hole (not shown in the figure) communicated with the floating oil groove 9 is arranged on the lower end cover 3, an oil plug 12 is arranged in the plug hole, an O-shaped ring 13 is arranged between the end surface of the upper end cover 2 and the end surface of the cutter shaft 6, a magnet 14 is arranged between the inner wall of the lower end cover and the outer wall of the cutter shaft. The O-shaped ring 13 is used for improving the connection sealing property between the upper end cover 2 and the cutter shaft 6; the magnet 14 can improve the connection sealing performance of the lower end cover 3 and the cutter shaft 6 on one hand, and can be used for being connected with equipment for monitoring the rotating state of the hob to help the equipment obtain the working condition of the hob on the other hand, so that the shield machine can timely correct the hob with a bad working tendency. The floating oil seal 10 is one kind of dynamic seal, can automatically compensate after the end surface is worn, and has the advantages of reliable work, simple structure and the like. In the device, the oil storage hole 84 on the sliding bearing 8 can store a certain amount of hydraulic oil or lubricating oil, and the oil amount among the oil through hole 11, the floating oil seal 10, the sliding bearing 8 and the plug hole automatically reaches balance in the working process of the hob, so that an oil film is established on the inner wall surface and the outer wall surface of the sliding bearing 8, the oil film has higher continuous forming capability and pressure maintaining capability, higher bearing capacity is further obtained, and the problems of eccentric wear of the hob and even cutter shaft fracture caused by the phenomena of premature wear of a slewing bearing, bearing fracture and slewing failure and the like in the working process of the hob are solved. The chip storage groove 83 on the sliding bearing 8 can store the abrasive dust generated by the friction between the cutter body and the disc surface, so that the abrasive dust is prevented from being mixed into the oil film playing a bearing role, the quality of the oil film is improved, and the rotation balance performance of the cutter body and the cutter ring is further ensured.

In order to improve the logical oil effect of logical oilhole, the utility model provides a logical oilhole 11 is biconical and its major part end is located the central plane of cutter body, can play certain control action to the circulation of oil mass like this, is convenient for draw and penetrates hydraulic oil or lubricating oil under the unbalanced condition of local oil pressure, fills the continuity of oil film in order to guarantee the oil film rapidly.

In order to improve the rolling support performance of slide bearing, the utility model discloses be provided with floating gap 15 between two slide bearing 8's cylindrical surface, utilize this floating gap 15 to be favorable to improving slide bearing pivoted equilibrium itself, especially make the oil film on the slide bearing 8 inside and outside wall surface have sufficient oil mass to support.

The axial length of the floating gap 15 provided in the device is 5-10 mm, so that the rotating balance performance of the sliding bearing 8 and the distribution uniformity of an oil film can be further ensured.

Still further, the utility model discloses well cutter body 1 is located the axial thickness of oil through hole outside portion and is greater than the axial width that the cutter body is located 11 inside portions of oil through hole, and cutter body 1 is located the cooperation of oil through hole inside portion and slide bearing 8, can make slide bearing 8 and cutter body 1 establish good cooperation relation like this to guarantee that 1 inner edge part of cutter body has even atress supporting condition, prolonged the actual life of cutter body 1 and cutter ring 5 to a certain extent.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.

Claims (5)

1. A novel sliding bearing hob for a shield machine comprises a hob body, wherein an upper end cover and a lower end cover are respectively arranged on two side surfaces of the hob body, bolts used for connecting cutter shafts are respectively arranged on the upper end cover and the lower end cover, a cutter ring is arranged outside the hob body, a cutter shaft is arranged inside the hob body, and a retainer ring is arranged at the connecting end of the cutter ring and the hob body. The floating oil groove is internally provided with a floating oil seal, a plurality of oil through holes communicated with the floating oil groove are formed in the side face of the cutter body, a plug hole communicated with the floating oil groove is formed in the lower end cover, an oil plug is arranged in the plug hole, an O-shaped ring is arranged between the end face of the upper end cover and the end face of the cutter shaft, and a magnet is arranged between the inner wall of the lower end cover and the outer wall of the cutter shaft.

2. The sliding bearing hob for the shield tunneling machine according to claim 1, wherein the oil through hole is biconical and the large end thereof is located on the central surface of the hob body.

3. The sliding bearing hob for the shield machine according to claim 2, wherein a floating gap is provided between cylindrical surfaces of the two sliding bearings.

4. The sliding bearing hob for the shield machine according to claim 3, wherein the axial length of the floating gap is 5-10 mm.

5. The sliding bearing hob according to claim 4, wherein the axial thickness of the outer portion of the cutter body located in the oil passing hole is greater than the axial width of the inner portion of the cutter body located in the oil passing hole, and the inner portion of the cutter body located in the oil passing hole is matched with the sliding bearing.

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