CN1007634B

CN1007634B - Driving arrangement for cutting heads or rolls of advancing or mining machine

Info

Publication number: CN1007634B
Application number: CN 88103728
Authority: CN
Inventors: 阿尔弗雷德·齐茨; 彼得·科格勒
Original assignee: Voestalpine AG
Current assignee: Voestalpine AG
Priority date: 1987-06-17
Filing date: 1988-06-16
Publication date: 1990-04-18
Also published as: AT388024B; IN168210B; GB2205881A; GB8814049D0; CN88103728A; DE3820264C2; ATA154587A; DE3820264A1; ES2008545A6

Abstract

In a driving arrangement for the cutting heads or rolls of an advancing or mining machine having the cutting heads or rolls rotatably supported on a cantilever arm at both sides thereof and having the driving shaft rotatably supported within the interior of the cantilever arm (1), the output shafts (2) are supported in mutually coaxial relation at the free end of the cantilever arm and carry at their respective mutually facing inner ends a gear wheel being in meshing engagement within the interior of the cantilever arm with a common paraxial intermediate gear wheel (4). In this case, the mutually facing inner ends of the output shafts are supported on a common bearing carrier (13) being stationary relative to the cantilever arm, and the output shafts comprise a central cavity (19) extending in axial direction. The output shafts are non-rotatably connected with the heads or rolls. Preferably, the bearing carrier (13) extends through the axes of the output shafts (2) and carries axial tubular protrusions (20) extending through the cavity (19) of the output shafts, noting that conduits (21) for the supply of pressurized cooling liquid are connected to the bearing carrier.

Description

Driving arrangement for cutting heads or rolls of advancing or mining machine

The present invention relates to the digging head of development machine or digger or the transmission device of digging roller, this digging head or roller are bearing in the both sides of cantilever in rotating mode, and power transmission shaft is bearing in the inside of cantilever in rotating mode.

This class development machine or or digger in, digging head or roller are supported, so that respectively around or the axis that intersect rotation transversal with the longitudinal axis of digging arm or cantilever.This device can obtain from Australian Patent AT-PS 359.453.Because in the digging operation process, produce high temperature on the cutter head, under any circumstance, the cooling of cutter head is favourable.People advised also that water cooling cutter head was with the formation of containment spark, and spark is accompanied by the danger of blast.For this reason, people have understood installation water spout on digging head itself, so that jet water course directly sprays to cutter head.Because the effect of the dust that the nozzle of this cutter head cooling unit is formed in the digging operation process requires under high as far as possible pressure with the water supply nozzle, to prevent the obstruction of nozzle.In known structure because the digging head rotates, so with water by the bearing of digging head, promptly be supplied to the digging head by the digging arm usually.Under high hydraulic pressure situation, the sealing of water supply installation is a more complicated.From AT-PS 359 453 above-mentioned, know a kind of device, wherein, the water supply of nozzle is realized by bearing, this bearing and digging arm rigid connection, and the afterbody, particularly a planetary gear of reduction gearing transmission device are housed.After this bearing, the supply of water is to be realized by the axial passage that leads to the digging head outside, and it must prevent especially that sealing flows in the space that gear is installed owing to leaking, because lubricating system was lost efficacy.In these known configurations, be equipped with one in the both sides of digging head and comprise this planetary geared system, and possess series of characteristics, so that high pressure sealing to be provided, prevent that cooling water from entering in the gear-box.

The digger of knowing from Australian Patent AT-PS 339 235 and BP GB-PS 1 581 154, the afterbody of back gear is configured in the respective inner of digging head.In these known configurations, the supply cooling medium must extend through the operative gear device for the feed line of cutter head, under high-pressure situations, requires complicated sealing device, flows in the geared system to prevent cooling medium.

Two this back gears are contained in the structure of the digging head or the digging roller of hollow, mean the installation cost that needs are huge, in addition, this device also exists water because sealing leak and the danger that under high pressure enters lubricating loop, make lubricant deterioration like this, thereby may damage the geared system of digging head inside.

The purpose of this invention is to provide a kind of the sort of transmission device of mentioning at the beginning, its structure is more simple, can reliably refrigerating medium under high pressure be supplied to the nozzle of digging head or digging roller.

For solving above-mentioned task, transmission device of the present invention mainly comprises two output shafts, they are bearing in the free end of cantilever mutually coaxially, in their opposed facing the inners separately a gear are housed, and this two gear is meshed with public, a paraxial idler gear in cantilever inside.Opposed facing the inner of two output shafts is bearing in one with respect on the static common axis bearing of cantilever, and output shaft comprises a centre bore that extends vertically, and output shaft connects with digging head or digging roller in not rotatable mode.In this structure, water channel no longer needs to extend through the one-level geared system, but can be by the output shaft of hollow, it is to be noted that opposed facing the inner with two output shafts is bearing in one with respect to this feature on the static common axis bearing of cantilever, provide with plain mode water supply conduit is connected to possibility on this bearing support.Since the idler gear of the afterbody of back gear by device in the digging arm, the rotation of the rotation of idler gear and digging head or digging roller is parallel to each other, as mentioned below, the desired sealing of coolant delivery apparatus, also greatly simple under the pressure coolant situation, this is because it no longer needs through the one-level geared system.In addition, can use less digging roller or the digging head in occupation of land space.This structure that the axis of back gear parallels with the rotational line of digging head or roller basically, the possibility that the single-piece gear-box is installed is provided in simple mode, this is because the required structural member of this geared system, can be inserted in the gear-box by the side direction perforate, make maintenance work very convenient.Generally speaking, transmission device of the present invention makes the structure of geared system be easy to installation and maintenance, and additional significant advantage also is provided, under high pressure supply coolant and do not have any problem.

Advantageously, the device of supply cooling fluid body is further improved, bearing support is extended along the axis of output shaft, and bearing support is equipped with the axial tubular elongator of the centre bore that extends through output shaft, and the conduit of supply cooling fluid body connect under pressure with bearing support.The tubulose elongator itself that is contained on the bearing support also connects with bearing support in not rotatable mode, thereby connects with digging arm or cantilever, therefore, only needs the minor diameter sealing surface in the far ultraviolet side of geared system.In the present embodiment, bearing support itself can extend between the end of two output shafts as spacer member, preferably can be designed to basically the spacer member of extending along the cantilever longitudinal axis, its end is located at the certain intervals place of idler gear front of the afterbody of cantilever inside.

In a particularly simple manner, bearing support can be designed to and tank wall, particularly in aggregates with the antetheca of cantilever.Consequently the assembling of case is simple.Except the favourable monolithic design of the gear-box in the cantilever position, output shaft can with the case shroud ring around, and the case cover can be fixed tightly in together by the dash member of supporting shaft holder.

Bearing support is except having above-mentioned advantage and supply cooling fluid under the pressure is simple, also providing the firm bearing arrangement that can bear enormous power.In order to lay or even large-sized bearing in simple mode, should advantageously come to select like this its structure, make the facing on the end mutually of external gear of being equipped with of two output shafts include dimple, to lay the bearing that is fixed on the bearing support.The bearing space of She Zhiing can directly be filled out with gear lubricant in such a way, makes arrangement works reliable, can not wear and tear, and maintenance workload is very little.

Hereinafter further specify the present invention with reference to embodiment shown in the accompanying drawing.

Accompanying drawing is depicted as the axial sectional view that digging arm and output shaft are fitted together, and wherein, the digging head or the digging roller that are attached to above-mentioned output shaft are omitted.

In digging arm or cantilever 1, on the free end of cantilever, be supported with two mutual coaxial output shafts 2 in rotating mode, an external gear 3 is respectively arranged on the inner that faces one another of two output shafts.Two external gears 3 and public idler gear 4 engagements.Idler gear 4 comprises gear ring 5, and its axis 6 is parallel to each other with above-mentioned two output shafts 2.Idler gear 4 is equivalent to be installed in the afterbody of the reduction gearing transmission device in the gear-box 8.This reduction gearing transmission device also comprises other gear, and their axis 9,10 is parallel with axis 6,7.Based on this gear drive, might change single gear part by the perforate on the gear-box 8, this perforate can cover with for example cover plate 11 and 12.

The inner that faces one another of above-mentioned two output shafts 2 is bearing in respect on the static public bearing support 13 of cantilever 1 with bearing 14, note that the bearing support 13 and the antetheca 15 of cantilever 1 form an integral body.In this case, bearing support 13 is designed to a spacer member, extends along the direction of the longitudinal axis 16 of cantilever 1 basically, and its end is positioned at the certain intervals place, front of afterbody idler gear 4.Supporting output shaft and the bearing 14 that is fixed to bearing support 13 are placed in the dimple 17 of output shaft 2.Output shaft 2 also is bearing on the cantilever 1 by bearing 18.

Each output shaft 2 comprises axial center hole 19, and the tubulose elongator 20 of bearing support 13 stretches in centre bore 19, so that cooling fluid is supplied to the nozzle of digging head under pressure.In the present embodiment, the tubulose elongator 20 in being rigidly attached to bearing support 13 provides cooling fluid to be realized by conduit 21.For the cooling fluid that prevents to pressurize enters in the gear-box, near the dimple 17 of the outlet position of tubulose elongator 20 and output shaft 2,

seal

22 and 23 are installed in simple mode.Note that should be only at the minor diameter position in gear drive outside configuration sealing surface, so the structure of seal simplifies greatly, can prevent reliably that especially the liquid that pressurizes from penetrating in the sliding agent of gear drive.

Except owing to adopt that its axis is parallel to that gear that the output shaft axis extends causes be easy to assembling and for ease of maintenaince, if these two output shafts by case cover 24 around, and the case cover is fixed on the dash member that has bearing support 13 15 of cantilever 1, just can make output shaft 2 be easy to assembling and replacing.

Claims

1, the digging head of development machine or digger or the transmission device of digging roller, above-mentioned digging head or roller are bearing in the both sides of cantilever in rotating mode, and power transmission shaft is rotatably supported in cantilever inside, the invention is characterized in that two output shafts (2) are bearing in the free end of cantilever (1) mutually coaxially, on the inner separately that faces one another of two output shafts, gear (3) is housed, public the inside of cantilever (1) and one, paraxial idler gear (4) is meshed, opposed facing the inner of two output shafts (2) is bearing in respect on the static common axis bearing (13) of cantilever (1), output shaft (2) comprises the centre bore (19) that extends vertically, and output shaft (2) connects with digging head or roller in not rotatable mode.

2, transmission device as claimed in claim 1, it is characterized in that bearing support (13) stretches along the axis (7) of output shaft (2), bearing support (13) is equipped with the axial tubular elongator (20) of the centre bore (19) that extends through output shaft (2), and the conduit of supplied with pressurized cooling fluid (21) is communicated with bearing support (13).

3, transmission device as claimed in claim 1 is characterized in that bearing support (13) becomes an integral body with tank wall, and is particularly in aggregates with the antetheca (15) of cantilever (1).

4, transmission device as claimed in claim 2 is characterized in that bearing support (13) becomes an integral body with tank wall, and is particularly in aggregates with the antetheca (15) of cantilever (1).

5, as each described transmission device in the claim 1 to 4, it is characterized in that bearing support (13) is designed to a spacer member, basically the longitudinal axis (16) along cantilever (1) extends, and terminates at the certain intervals place, front of inner last idler gear (4) of cantilever (1).

6,, it is characterized in that two output shafts (2) include dimple (17) on it is equipped with the opposed facing end of external gear (3), to lay the bearing (14) that is fixed on the bearing support (3) as each described transmission device in the claim 1 to 4.

7, transmission device as claimed in claim 5 is characterized in that two output shafts (2) include dimple (17) on it is equipped with the opposed facing end of external gear (3), to lay the bearing (14) that is fixed on the bearing support (3).