CN106703799A

CN106703799A - Radial and telescopic cutting head of heading machine

Info

Publication number: CN106703799A
Application number: CN201611011424.3A
Authority: CN
Inventors: 郭辰光; 岳海涛; 李源
Original assignee: Liaoning Technical University
Current assignee: Liaoning Technical University
Priority date: 2016-11-17
Filing date: 2016-11-17
Publication date: 2017-05-24
Anticipated expiration: 2036-11-17
Also published as: CN106703799B

Abstract

A radial and telescopic cutting head of a heading machine is axially divided into a cutting head top and a cutting head conical part, wherein the cutting head conical part is radially and averagely divided into 4-6 division bodies, the front end of each division body is hinged with the rear end of the cutting head top, a push-pull rod hinged with each division body is arranged at the rear end of the corresponding division body, the rear end of each push-pull rod is hinged with a shaft sleeve, the outer diameter of the shaft sleeve is smaller than the diameter of the rear end of the cutting head conical part, the push-pull rods and a rotating shaft form a umbrella cover support rod, the rear ends of the shaft sleeves and a round casing are welded together, the shaft sleeves and the casing can only axially slide along the rotating shaft and cannot rotate radially, and the casing can be pushed and pulled to move forwards and backwards in the axial direction of the rotating shaft by a push-pull mechanism composed of an I-shaped push-pull part and telescopic oil cylinders. The cutting head pushes the push-pull part to slide forwards along the rotating shaft via the oil cylinders, and division bodies at the cutting head conical part are spread by push-pull rods, so that a mud mixture covering the surface of the cutting head falls off; the cutting contact surface and the contact angle of the cutting head relative to rock are changed based on stretching and retracting of the division bodies of the cutting head conical part, therefore, the cutting head is adapted to cutting of rock with different ingredients.

Description

A kind of telescopic cutting head of roadheader of radial direction

Technical field

The present invention relates to mining equipment, particularly a kind of telescopic cutting head of roadheader of radial direction.

Background technology

Cutterhead is the important composition component of mine and underground engineering tunnel exploitation development machine.Existing tunneling machine cutting Head is integral type structure, and coning, surface carries the spaced cut tooth of helical form, is fixedly mounted on development machine for outside In rotary shaft.In mine and underground engineering tunnel exploitation, development machine uses this cutterhead, when the water excessively in cut soft rock soil layer When band and sandstone band, usually occur that slurry mixture coats cutterhead phenomenon, cause cutting efficiency to reduce, have to when serious Stop operation, manually carry out mud eliminating treatment.Meanwhile, some soft rock soil layers are mingled with various ground, due to this cutterhead Cut can only be carried out to ground according to fixed cut contact surface and contact angle, not only cutting efficiency can not reach maximization, and And it is easily caused cutterhead damage.

The content of the invention

For the above-mentioned technical problem that existing cutting head of roadheader is present, can radially be stretched it is an object of the invention to provide a kind of The cutting head of roadheader of contracting.

The telescopic cutting head of roadheader of radial direction that the present invention is provided, cut head surface carries spaced section of helical form Tooth is cut, cutter head shaft is to cutterhead top and cutterhead tapering is divided into, and the rotary shaft front end of development machine is solid with cutterhead top Fixed connection, cutterhead tapering is radially averagely divided into 4 --- 6 splits, the rear end at the top of the front end of each split and cutterhead It is hinged, there is the pull bar that a front end is hinged with split the rear end of each split, the rear end of pull bar is hinged with the front end of axle sleeve, axle The external diameter of set is less than the diameter (making pull bar that the umbrella cover support bar similar to umbrella is formed with rotary shaft) of cutterhead tapering rear end, The rear end of axle sleeve is integrally welded with circular involucrum, and axle sleeve and involucrum can only be along rotary shaft axles by the chute holding in rotary shaft To the annexation for sliding, being unable to radial rotating, involucrum can axially back and forth be moved by push-pull mechanism push-and-pull along rotary shaft.

The push-pull mechanism that the push-and-pull involucrum is moved axially back and forth along rotary shaft, including axial cross section pushing away in I-shaped Draw piece, there is cylindrical roller on two sides before and after pull-push piece is anterior, and pull-push piece front portion is placed in the involucrum, and between having with the inwall of involucrum Gap, pull-push piece neck stretches out from the rear end of involucrum, and pull-push piece rear portion is hinged with the front end of two symmetrical telescopic oil cylinders, stretches The rear end of oil cylinder is hinged with the front end of cantilevered casing, and the front end of cantilevered casing is connected by bearing with rotary shaft, cantilevered The rear end of casing is fixedly connected with planetary reduction gear shell.

When development machine is worked using the invention described above cutterhead, rotary shaft drives cutterhead to rotate.Mix when there is mud During thing cladding cutterhead phenomenon, cutterhead is exited the soft rock of institute's cut, then start telescopic oil cylinder, pushed away by the elongation of oil cylinder Along axial rotary front slide, push-pull mechanism promotes circular involucrum and axle sleeve (now to be pushed away along axial rotary front slide to dynamic push-pull mechanism The cylindrical roller of drawing mechanism behind is in contact with rear wall in involucrum), the pull bar being hinged with axle sleeve will constitute cut nose cone Multiple split rear portions in portion strut, and the slurry mixture for being coated on cut head surface is come off.Thereafter, returning by telescopic oil cylinder Contracting makes multiple splits in cutterhead tapering recover closure state, and continuation carries out cut to rock.

Cutterhead can also be changed with respect to rock by flexible (strut and close) of multiple splits in cutterhead tapering Cut contact surface and contact angle, to adapt to the cut to heterogeneity rock, improve cutting efficiency, reduce cutterhead spoilage.

Brief description of the drawings

Fig. 1 is structural representation of the invention；

Fig. 2 is the axial sectional view of Fig. 1；

Fig. 3 is the schematic diagram of pull-push piece in Fig. 2；

Fig. 4 is the stereogram of Fig. 3 pull-push pieces；

Fig. 5 is cutterhead partial component exploded view.

Specific embodiment

Below in conjunction with drawings and Examples, the invention will be further described.

With reference to Fig. 1 to Fig. 5, the present embodiment cutting head of roadheader, surface is carried between existing cutterhead identical helical form Every the cut tooth 1 of arrangement.From unlike existing cutterhead, cutter head shaft is to being divided into two parts --- 2 Hes of cutterhead top Cutterhead tapering 3.The rotary shaft 14 of development machine is fixedly connected by spline housing 18 and screw 19 with cutterhead top.Cut nose cone Portion is radially averagely divided into 4 splits (as shown in Figure 5).The front end of each split passes through alignment pin with the rear end at the top of cutterhead 11 are hinged, and the rear end of split has a front end to pass through the pull bar 4 that alignment pin 17 is hinged with it, rear end and the axle sleeve 10 of pull bar Front end is hinged (have four boss for being hinged on axle sleeve), the diameter of the external diameter less than cutterhead tapering rear end of axle sleeve, makes four Individual pull bar forms the umbrella cover support bar similar to umbrella with rotary shaft.The rear end of axle sleeve is welded on the antetheca of circular involucrum 5, Axle sleeve and involucrum can only be slid axially, be unable to the company of radial rotating by the holding (not shown) of the chute in rotary shaft along rotary shaft Connect relation.Involucrum can axially back and forth be moved by the push-pull mechanism push-and-pull being connected in the following manner with it along rotary shaft.

The push-pull mechanism includes set on the rotary shaft, is slidably connected the pushing away of (axially and radially slidably) with rotary shaft Draw piece 9.As shown in Figure 3 and Figure 4, the axial cross section of pull-push piece 9 is I-shaped, and there is circle on the front and rear two sides of pull-push piece front portion 9-1 Post roller 9-5, for mitigating frictional force when pull-push piece is contacted with involucrum inwall.Pull-push piece front portion is placed in the involucrum, and Inwall with involucrum keeps certain interval, can be moved forward and backward in involucrum；Pull-push piece neck 9-2 is from the hole of involucrum rear end Stretch out；The pull-push piece rear portion 9-3 being placed in outside involucrum passes through pull-push piece hinge hole 9-4 and two symmetrical telescopic oil cylinders 6 Front end be hinged, through the end cap of the front end of cantilevered casing 7, the front end with cantilevered casing passes through casing for the rear end of telescopic oil cylinder Hinge hole 16 is hinged, and the front end of cantilevered casing is connected by bearing 15 with rotary shaft, and rear end and the planet of cantilevered casing subtract Fast device shell 8 is fixedly connected.Planetary reduction gear output shaft 13 is connected by shaft coupling 12 with rotary shaft, input shaft of planetary reduction gear Connect with motor (not shown).

Claims

1. a kind of telescopic cutting head of roadheader of radial direction, cut head surface carries the spaced cut tooth (1) of helical form, its It is characterised by：Cutter head shaft to be divided into cutterhead top (2) and cutterhead tapering (3), rotary shaft (14) front end of development machine It is fixedly connected with cutterhead top, cutterhead tapering is radially averagely divided into 4-6 splits, the front end of each split and cut The rear end of overhead is hinged, and there are the pull bar (4) that a front end is hinged with split, the rear end of pull bar and axle in the rear end of each split The front end for covering (10) is hinged, the diameter of the external diameter less than cutterhead tapering rear end of axle sleeve, and the rear end of axle sleeve is welded with circular involucrum (5) One is connected into, axle sleeve and involucrum keep to be slid axially along rotary shaft, are unable to radial rotating by the chute in rotary shaft Annexation, involucrum can axially back and forth be moved by push-pull mechanism push-and-pull along rotary shaft.

2. the telescopic cutting head of roadheader of radial direction according to claim 1, it is characterised in that：The push-and-pull involucrum (5) The push-pull mechanism moved axially back and forth along rotary shaft, including axial cross section, in the pull-push piece (9) of I-shaped, pull-push piece is anterior There is cylindrical roller (9-5) on two sides before and after (9-1), and pull-push piece front portion is placed in the involucrum, and has gap with the inwall of involucrum, pushes away Draw piece neck (9-2) stretches out from the rear end of involucrum, the front end of pull-push piece rear portion (9-3) and symmetrical two telescopic oil cylinders (6) It is hinged, rear end and the front end of cantilevered casing (7) of telescopic oil cylinder are hinged, the front end of cantilevered casing is by bearing (15) and rotation Rotating shaft connects, and the rear end of cantilevered casing is fixedly connected with planetary reduction gear shell (8).