CN215057366U - Novel hob with sealing structure - Google Patents

Abstract

The utility model provides a novel seal structure hobbing cutter, on hobbing cutter body and rotation axis, be provided with dustproof subassembly and seal assembly between the rotatory fitting surface of rotation axis and hobbing cutter body, dustproof subassembly sets up in the one side of keeping away from hobbing cutter body central plane, and dustproof subassembly is including dustproof pad, a plurality of piston rings, lubricating grease and first O type circle, and seal assembly sets up in the one side that is close to hobbing cutter body central plane, and seal assembly is sealed the pad and second O type circle including sealing, and the outer wall and the inner wall of sealed pad are the lips and are outer lip and interior lip respectively. The utility model utilizes the dustproof component to effectively prevent sand stone and mud from permeating into the cutter body; the sealing assembly is used as a rotary sealing structure, so that the sealing performance between the hob body and the internal environment of the rotating shaft can be further ensured, the probability of eccentric wear of the hob is greatly reduced, and the service life of the device is maximally close to the design service life. The utility model relates to a rationally, simple structure is fit for extensive the popularization.

Description

Novel hob with sealing structure

Technical Field

The utility model belongs to the technical field of the shield constructs the cutter, especially, relate to a novel seal structure hobbing cutter.

Background

The shield machine is a kind of excavating equipment. In the shield machine, the digging and cutting system comprises a cutter head and a driving system thereof, the digging and cutting system has decisive influence on the construction effect of the shield machine, and the cutter of the shield machine can be classified according to the movement mode, the arrangement position, the mode, the shape and the like. Among them, the cutting blade and the hob can be classified according to the cutting principle.

When the shield machine is propelled to work, the hob has an important rock breaking function, and underground sand and mud easily permeate into the hob and leak lubricating oil, so that the hob is damaged by eccentric wear, and the design life of the hob is difficult to reach.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the eccentric wear problem that above-mentioned hobbing cutter exists at broken rock in-process, provide a reasonable in design, simple structure, dustproof and sealed effect better and be favorable to prolonging the novel seal structure hobbing cutter of hobbing cutter life-span.

In order to achieve the above object, the utility model adopts the technical scheme that the utility model provides a novel seal structure hob, which comprises a hob body, wherein the hob body is rotatably arranged on a rotating shaft, a dustproof component and a sealing component are arranged between the rotating matching surface of the rotating shaft and the hob body, the dustproof component is arranged at one side far away from the central plane of the hob body, the dustproof component comprises a dustproof cushion, the dustproof cushion is a double-lip gasket with the section shaped like ユ, the opening of the dustproof cushion faces one side far away from the central plane of the hob body, the opening side of the dustproof cushion is provided with a plurality of piston rings and lubricating grease, the other side of the dustproof cushion is provided with a first O-shaped ring, the sealing component is arranged at one side near the central plane of the hob body, the sealing component comprises a sealing cushion, the outer wall and the inner wall of the sealing cushion are both double-lip and respectively are an outer lip and an inner lip, and a second O-shaped ring is arranged outside the outer lip.

Preferably, elastic rings with V-shaped cross sections are arranged between the outer lip and the second O-shaped ring and between the inner lip and the rotating shaft.

Preferably, the plurality of piston rings are concentrically arranged inside and outside.

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

1. the utility model provides a novel seal structure hob, which can effectively improve the dustproof capability of the fitting surface of the hob body and the rotating shaft by utilizing the dustproof pad, the piston ring and the first O-shaped ring, and effectively prevent sand and mud from permeating into the hob body by the oil seal effect of lubricating grease; the rotary sealing structure is formed by the sealing gasket and the second O-shaped ring, so that the sealing performance between the hob body and the internal environment of the rotating shaft can be further ensured, the probability of eccentric wear of the hob is greatly reduced, and the service life of the device is close to the design service life to the maximum extent. The utility model relates to a rationally, simple structure is fit for extensive the popularization.

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 schematic structural diagram of a hob with a novel sealing structure provided by an embodiment;

FIG. 2 is an enlarged schematic view of the structure A in FIG. 1 according to an embodiment;

in the above figures, 1, a hob body; 2. a rotating shaft; 3. a dust-proof assembly; 31. a dust-proof pad; 32. a piston ring; 33. a first O-ring; 4. a seal assembly; 41. a gasket; 411. an outer lip; 412. an inner lip; 42. a second O-ring; 43. an elastic ring.

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.

In the embodiment, as shown in fig. 1 and fig. 2, the novel hob with a sealed structure provided by the present invention comprises a hob body 1, wherein the hob body 1 is rotatably disposed on a rotating shaft 2; the hob body 1 and the rotating shaft 2 are prior art, and this embodiment is not described herein again. The utility model discloses a focus has set up dustproof subassembly 3 and seal assembly 4 between hobbing cutter body 1 and rotation axis 2. It should be noted that, at least two sets of combined structures of the dustproof assembly and the sealing assembly are arranged between the hob body and the rotating shaft, and the two sets of combined structures are symmetrically distributed about the central plane of the hob body, so that the sealing performance of the device is ensured.

Specifically, the utility model provides a be provided with dustproof subassembly 3 and seal assembly 4 between the rotatory fitting surface of rotation axis 2 and hob body 1, dustproof subassembly 3 sets up in the one side of keeping away from 1 central plane of hob body, dustproof subassembly 3 includes dustproof pad 31, dustproof pad 31 is one side of keeping away from hob body central plane for the section is the lip packing ring of "ユ" font and its opening orientation, the opening side of dustproof pad 31 is provided with a plurality of piston rings 32 and lubricating grease, the opposite side of dustproof pad 31 is provided with first O type circle 33. The dustproof pad 31 in the dustproof assembly 3 adopts the design of the shape of 'ユ', which can effectively increase the radial sealing range of the dustproof pad 31, and particularly, the dustproof pad 31 has certain elasticity, the inner side of the dustproof pad is in contact fit with the cylindrical surface of the rotating shaft 2, and the outer side of the dustproof pad is provided with a first O-shaped ring 33 for elastic sealing; piston ring 32 can effectively support dustproof pad 31, can reduce the probability that dustproof pad 31 excessively warp, and the oil blanket effect of lubricating grease in addition for dustproof subassembly 3 is whole can effectively prevent grit and mud infiltration cutter body, and then protects seal assembly 4 not with external medium contact such as silt, water, dust, has improved rotary seal's operational environment, has improved oil blanket structure's ageing resistance, wearability and life.

Further, the utility model provides a sealing component 4 sets up in the one side that is close to hobbing cutter body central plane, and sealing component 4 is the lips mouth and is outer lip 411 and interior lip 412 respectively including sealed 41 of filling up, sealed outer wall and the inner wall of filling up 41, and the outside of outer lip 411 is provided with second O type circle 42. Wherein, the sealing gasket 41 and the second O-shaped ring 42 form a rotary sealing structure, the sealing component 4 can rotate along with the rotation of the rotating shaft 2 and the hob body 1, and the design of the inner lip 412 and the outer lip 411 can further ensure the sealing performance of the inner environment of the hob body 1 and the rotating shaft 2, greatly reduce the probability of eccentric wear of the hob, so that the service life of the device is maximally close to the design service life

In order to prolong the practical service life of sealing pad, the utility model provides a between outer lip 411 and second O type circle 42 and all be provided with "V" font sectional elastic ring 43 between inner lip 412 and the rotation axis 2, utilize elastic ring 43 to effectively support outer lip 411 and inner lip 412 to the rotary seal function of seal assembly 4 has been guaranteed, thereby the leakproofness between protection rotation axis 2 and the hobbing cutter body 1, and then prolong seal assembly and the holistic life of this device.

In order to improve the dustproof supporting role of piston ring 32 to dustproof pad 31, the utility model provides an inside and outside concentric distribution of a plurality of piston rings 32 can make its elastic shrinkage ability of piston ring 32 full play through the form that adopts concentric distribution to its dynamic shrinkage can rationally correspond the dynamic clearance that hob body 1 and rotation axis 2 produced in the course of the work, and then guarantee the leakproofness of this device.

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 (3)

1. A hob with a novel sealing structure comprises a hob body, wherein the hob body is rotatably arranged on a rotating shaft, it is characterized in that a dustproof component and a sealing component are arranged between the rotating matching surface of the rotating shaft and the rolling cutter body, the dustproof assembly is arranged on one side far away from the central surface of the hob body and comprises a dustproof pad, the dustproof pad is a double-lip washer with the cross section shaped like ユ, the opening of the double-lip washer faces to the side far away from the central surface of the hob body, a plurality of piston rings and lubricating grease are arranged on the opening side of the dustproof pad, a first O-shaped ring is arranged on the other side of the dustproof pad, the sealing component is arranged on one side close to the central surface of the hob body and comprises a sealing gasket, the outer wall and the inner wall of the sealing gasket are both double lips and are respectively an outer lip and an inner lip, and a second O-shaped ring is arranged outside the outer lip.

2. The hob with a novel sealing structure according to claim 1, wherein elastic rings with V-shaped sections are arranged between the outer lip and the second O-ring and between the inner lip and the rotating shaft.

3. The hob with a novel sealing structure according to claim 2, wherein the plurality of piston rings are concentrically arranged inside and outside.

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