CN-122014275-A - Longitudinal planetary hob cutter head device for triangular section excavation

CN122014275ACN 122014275 ACN122014275 ACN 122014275ACN-122014275-A

Abstract

The application relates to a vertical planetary hob cutter head device for triangular section excavation, which comprises a base, a vertical cutter head body, a hob and a planetary transmission mechanism, wherein the rotation axis of the vertical cutter head body is parallel to the expected tunneling direction and is rotatably supported on the base, the hob is rotatably mounted on the peripheral surface of the vertical cutter head body, the planetary transmission mechanism is configured to drive the base to execute a compound planetary motion, the compound planetary motion comprises driving the base to rotate around a fixed first axis and driving the base to rotate around the central axis of the base, the vertical cutter head body is adopted as a single hob bearing structure, the base is driven to move through a set of planetary mechanism, the whole structure is extremely compact, the moving parts are few, the transmission chain is short, the design of the high integration brings excellent structural rigidity and shock resistance capability, the high-load working condition of hard rock stratum is very suitable, and the problem that the reliability of the complex structure in hard rock is insufficient is solved.

Inventors

ZHUANG QIANWEI
ZHANG CHI
YANG CHENGZHI
ZHU YANFEI
GONG WEI
LU LUNJIE
LI HAO
LIU ZHIHUI
YUAN WEIHAO
SONG YUN
GU ZHENGRONG

Assignees

上海隧道工程有限公司
上海城建隧道装备有限公司

Dates

Publication Date: 20260512
Application Date: 20260330

Claims (8)

1. A vertical planetary hob blade disc device for triangle-shaped section excavation, its characterized in that includes: A base; a longitudinal cutter head body, the rotation axis of which is arranged parallel to the expected tunneling direction and is rotatably supported on the base; The hob is rotatably arranged on the outer peripheral surface of the longitudinal cutterhead body; A planetary transmission configured to drive the base to perform a compound planetary motion including driving the base to make an epicyclic motion about a fixed first axis; wherein the epicyclic motion and the autorotation motion of the base are coupled with each other through the planetary transmission mechanism; the cutter head driving mechanism is used for driving the longitudinal cutter head body to rotate around the axis of the cutter head body; The revolving and autorotation speed relation of the base is configured to enable the cutting track enveloping surface of the longitudinal cutter head body and the hob arranged on the longitudinal cutter head body to form a triangular section.
2. The vertical planetary hob cutter head device for triangular section excavation of claim 1, wherein the turnover and the autorotation of the base maintain a preset proportional relationship, and the turnover and the autorotation are opposite in rotation direction.
3. The vertical planetary hob cutter head device for triangular section excavation according to claim 2, wherein the preset proportional relation is 2:1.
4. A longitudinal planetary hob cutter head device for triangular section excavation according to claim 3, wherein the planetary transmission mechanism is a differential planetary gear train comprising a fixed gear ring and a planetary output gear connected to the base, the ratio of the number of teeth of the fixed gear ring to the number of teeth of the planetary output gear is 3:2.
5. The vertical planetary hob cutter head device for triangular section excavation of claim 1, wherein the cutter head driving mechanism is a built-in motor arranged between the vertical cutter head body and the base.
6. The vertical planetary hob cutter head device for triangular section excavation of claim 1, wherein at least two rows of hob cutters are installed along the circumference of the vertical hob cutter head body, and the installation axis of at least one row of hob cutters and the direction of a bus of the vertical hob cutter head body form a preset and fixed acute included angle.
7. The device for excavating triangular section as defined in claim 6 wherein adjacent rows of said cutters are offset from each other on the outer periphery of said cutter body.
8. The vertical planetary hob cutter head device for triangular section excavation of claim 1, wherein a scraper is further installed between the hob cutters on the outer peripheral surface of the vertical hob cutter head body.

Description

Longitudinal planetary hob cutter head device for triangular section excavation Technical Field The invention relates to the technical field of tunneling construction, in particular to a longitudinal planetary hob cutter head device for triangular section excavation. Background The full-section excavation with the triangular section is carried out in medium hard rock and hard rock stratum, and the cutterhead device is required to have extremely high rigidity and strong rock breaking capacity. The existing planetary special-shaped excavation scheme for hard rock is often complex in structure, for example, a plurality of sub-cutterhead units which are independently driven are adopted, and a complex transmission system and a plurality of moving parts face challenges in structural reliability, maintenance convenience and manufacturing cost when bearing high impact and high load of hard rock excavation. Therefore, a need exists for a triangular hob cutter head device that is more compact and robust in construction, has a shorter drive train, and is more adaptable to hard rock severe conditions. Disclosure of Invention The invention aims to overcome the defects of the prior art, provides a vertical planetary hob cutter head device for triangular section excavation, adopts a unique axial vertical hob cutter head body as a hob carrier, drives a base to move through a set of efficient planetary mechanism, has high integration of structure and superior rigidity, and is specially designed for efficient triangular excavation in a hard rock stratum. In order to achieve the above object, the present invention provides a longitudinal planetary hob cutter head device for triangular section excavation, comprising: A base; a longitudinal cutter head body, the rotation axis of which is arranged parallel to the expected tunneling direction and is rotatably supported on the base; The hob is rotatably arranged on the outer peripheral surface of the longitudinal cutterhead body; A planetary transmission configured to drive the base to perform a compound planetary motion including driving the base to make an epicyclic motion about a fixed first axis; wherein the epicyclic motion and the autorotation motion of the base are coupled with each other through the planetary transmission mechanism; the cutter head driving mechanism is used for driving the longitudinal cutter head body to rotate around the axis of the cutter head body; The revolving and autorotation speed relation of the base is configured to enable the cutting track enveloping surface of the longitudinal cutter head body and the hob arranged on the longitudinal cutter head body to form a triangular section. By adopting the technical scheme, the longitudinal cutter head body is adopted as a single hob bearing structure, the base is driven to move through the set of planetary mechanism, the whole structure is extremely compact, moving parts are few, the transmission chain is short, the high-integration design brings excellent structural rigidity and shock resistance, the high-load working condition of a hard rock stratum is very suitable, and the problem that the reliability of a complex structure in the hard rock is insufficient is solved. Further, the turnover and the autorotation of the base maintain a preset proportional relationship, and the turnover and the autorotation are opposite in rotation direction. By adopting the technical scheme, the turnover and rotation of the base are limited to maintain the preset proportion and the directions are opposite, so that the precise movement relation required by forming the triangular excavation envelope is ensured. Further, the preset ratio relationship is 2:1. By adopting the technical scheme, the ratio is specifically limited to 2:1, and the core motion parameters forming the triangular section are established. Further, the planetary transmission mechanism is a differential planetary gear train, the gear train comprises a fixed gear ring and a planetary output gear connected with the base, and the ratio of the number of teeth of the fixed gear ring to the number of teeth of the planetary output gear is 3:2. By adopting the technical scheme, the 2:1 motion ratio is realized through the differential planetary gear train with the gear ratio of 3:2, and the scheme has high transmission efficiency, compact structure and large gear bearing capacity, and is a key specific implementation mode for realizing the compact and firm design objective of the invention. Further, the cutter driving mechanism is a built-in motor arranged between the longitudinal cutter body and the base. By adopting the technical scheme, the built-in motor is adopted to directly drive the longitudinal cutter head body to rotate, the driving mode is direct and efficient, a complex intermediate transmission mechanism is omitted, the structure is further simplified, and the reliability is improved. Further, at least two rows of the hobs are arranged along the cir