CN217538703U - Hob for push bench - Google Patents

Abstract

The utility model discloses a hobbing cutter for pipe pushing jack, including arbor and casing, the arbor passes from the casing center, the surface of arbor is provided with the spacing groove, the arbor with casing sliding connection, just the casing set up with the spacing inslot, the casing with spacing groove sliding connection, the spacing groove both sides are provided with left sword lid and right sword lid respectively, left side sword lid, right sword lid all are provided with floating seal on being close to a side end face of casing inner chamber, floating seal sets up the casing inside and with casing zonulae occludens. The utility model has reasonable and simple structural design, and can adjust the position of the hob within a certain range by connecting the shell with the hob shaft in a sliding way and arranging the limit groove at the same time, thereby slowing down the abrasion of the hob and prolonging the service life of the pipe jacking machine; through setting up floating seal for the sealing performance of hobbing cutter is stronger, has further prolonged the life of hobbing cutter, has improved the efficiency of construction.

Description

Hob for push bench

Technical Field

The utility model relates to a push bench technical field especially relates to a hobbing cutter for push bench.

Background

Along with the continuous development and change of urban infrastructure, the laying amount of urban underground pipelines is continuously increased, and the awareness of people on environmental protection is also continuously enhanced, so that the pipe jacking technology (namely, non-excavation technology) is more and more important in the construction of urban infrastructure underground pipelines in China, the application of the technology thoroughly solves the problems of damage to urban buildings, road traffic blockage and the like in the process of underground pipeline burying construction, and the key point for realizing the technology lies in the matching use of a pipe jacking machine and a cutter thereof, so that the service life of a hob installed on a cutter head of the pipe jacking machine plays a crucial role in the construction efficiency and the cost on the premise of reliable quality of the pipe jacking machine.

However, in different stratums, the application conditions of the push bench are different, and the pebbles on a part of the bottom layer are hard, so that the hob of the push bench is seriously abraded, and the service life of the push bench is influenced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a hob for a push bench to solve the problems of the background art.

The purpose of the utility model is realized by adopting the following technical scheme:

the utility model provides a hobbing cutter for pipe pushing jack, includes hobbing cutter shaft and casing, the hobbing cutter shaft passes from the casing center, the surface of hobbing cutter shaft is provided with the spacing groove, the hobbing cutter shaft with casing sliding connection, just the casing set up with the spacing inslot, the casing with spacing groove sliding connection, the spacing groove both sides are provided with left sword lid and right sword lid respectively, left sword lid, right sword lid all are provided with floating seal on being close to a side end face of casing inner chamber, floating seal sets up the casing inside and with casing zonulae occludens, be provided with a plurality of alloy cutter tooth on the casing outer wall, left sword lid with right sword lid with pass through bolt fixed connection between the hobbing cutter shaft.

Preferably, two tapered roller bearings are arranged inside the shell, and the tapered roller bearings are coaxially juxtaposed inside the shell.

Preferably, the tapered roller bearing is a single row tapered roller bearing.

Preferably, a bearing spacer ring is installed between the adjacent tapered roller bearings, and the bearing spacer ring is coaxial with the roller shaft.

Preferably, an O-ring is disposed between the tapered roller bearing and the outer wall of the roller shaft.

Preferably, the shell is hardfaced with a wear layer.

Preferably, the alloy cutter teeth are made of wear-resistant high-strength alloy steel.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model has reasonable and simple structural design, and can adjust the position of the hob within a certain range by connecting the shell with the hob shaft in a sliding way and arranging the limit groove at the same time, thereby slowing down the abrasion of the hob and prolonging the service life of the pipe jacking machine; through setting up floating seal for the sealing performance of hobbing cutter is stronger, and has better centering performance, has further prolonged the life of hobbing cutter, has reduced construction cost, has improved the efficiency of construction.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. a roll shaft; 2. a housing; 3. a limiting groove; 4. a left knife cover; 5. a right knife cover; 6. floating sealing; 7. alloy cutter teeth; 8. a tapered roller bearing; 9. a bearing spacer ring; 10. and a wear-resistant layer.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments:

in the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

As shown in fig. 1, a hobbing cutter for push bench, including hobbing cutter shaft 1 and casing 2, hobbing cutter shaft 1 passes from casing 2 center, hobbing cutter shaft 1's surface is provided with spacing groove 3, hobbing cutter shaft 1 with casing 2 sliding connection, just casing 2 set up with in the spacing groove 3, casing 2 with spacing groove 3 sliding connection, spacing groove 3 both sides are provided with left sword lid 4 and right sword lid 5 respectively, all be provided with floating seal 6 on a side end face that left sword lid 4, right sword lid 5 are close to the casing 2 inner chamber, floating seal 6 sets up casing 2 inside and with casing 2 zonulae occludens, be provided with a plurality of alloy cutter teeth 7 on the casing 2 outer wall, left sword lid 4 with right sword lid 5 with pass through bolt fixed connection between the hobbing cutter shaft 1.

The alloy cutter teeth 7 are made of wear-resistant high-strength alloy steel, and the wear resistance and crushing capacity of the cutter teeth can be enhanced.

Through with casing 2 and 1 sliding connection of hob shaft, when making the hobbing cutter cut the comparatively hard position of rock, the resistance that the hobbing cutter was watched is great, the power that the hobbing cutter received passes to the casing, make the casing can follow the axial of hob shaft and move, drive the hobbing cutter simultaneously and move, adjust the position of hobbing cutter, make the hobbing cutter avoid the comparatively hard part of rock, thereby avoid cutting the wearing and tearing that cause the hobbing cutter because of the hobbing cutter to hard rock, the life-span of extension pipe pushing jack, simultaneously through set up floating seal 6 in casing 2, make the sealing performance of hobbing cutter stronger, and have better centering performance, the life of hobbing cutter has further been prolonged, construction cost is reduced, and the construction efficiency is improved.

Specifically, two tapered roller bearings 8 are arranged in the shell, the tapered roller bearings 8 are coaxially arranged in parallel in the shell 2, the tapered roller bearings 8 adopt single-row tapered roller bearings, and the adjustment performance and the bearing capacity of the starting torque of the hob are improved by arranging the tapered roller bearings 8.

Specifically, a bearing spacer ring 9 is installed between the adjacent tapered roller bearings 8, the bearing spacer ring 9 is coaxial with the roller shaft 1, and the bearing spacer ring 9 is arranged to balance the transverse stress of the two tapered roller bearings 8.

Specifically, an O-shaped sealing ring is arranged between the tapered roller bearing 8 and the outer wall of the roller shaft 1, and the O-shaped sealing ring enhances the sealing performance between the left and right knife covers and the roller shaft.

Specifically, the shell 2 is coated with a wear-resistant layer on the surface to enhance the wear resistance of the hob.

The utility model has reasonable and simple structural design, and the position of the hob can be adjusted within a certain range by connecting the shell 2 with the hob shaft 1 in a sliding way and arranging the limit groove 3 at the same time, thereby slowing down the abrasion of the hob and prolonging the service life of the pipe jacking machine; through setting up floating seal 6 for the sealing performance of hobbing cutter is stronger, and has better centering performance, has further prolonged the life of hobbing cutter, has reduced construction cost, has improved the efficiency of construction.

Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes are intended to fall within the scope of the claims.

Claims (7)

1. The utility model provides a hobbing cutter for pipe pushing jack, includes hobbing cutter shaft and casing, its characterized in that, the hobbing cutter shaft passes from the casing center, the surface of hobbing cutter shaft is provided with the spacing groove, the hobbing cutter shaft with casing sliding connection, just the casing set up with the spacing inslot, the casing with spacing groove sliding connection, the spacing groove both sides are provided with left sword lid and right sword lid respectively, left sword lid, right sword lid all are provided with floating seal on being close to a side end face of casing inner chamber, floating seal sets up the casing inside and with casing zonulae occludens, be provided with a plurality of alloy sword tooth on the casing outer wall, left sword lid with right sword lid with through bolt fixed connection between the hobbing cutter shaft.

2. The roller cutter of claim 1, wherein two tapered roller bearings are disposed within said housing, said tapered roller bearings being coaxially juxtaposed within said housing.

3. The hob for a push bench of claim 2, wherein the tapered roller bearing is a single row tapered roller bearing.

4. The roller cutter of claim 2, wherein a bearing spacer is mounted between adjacent tapered roller bearings, said bearing spacer being coaxial with said roller shaft.

5. The hob for a push bench of claim 2, wherein an O-ring is disposed between the tapered roller bearing and the outer wall of the hob shaft.

6. The roller cutter of claim 1, wherein said shell is hardfaced with a wear layer.

7. The hob for a push bench of claim 1, wherein the alloy cutter teeth are made of wear-resistant high-strength alloy steel.

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