CN202163832U

CN202163832U - Chain wheel shaft component of scraper conveyor

Info

Publication number: CN202163832U
Application number: CN201120221571XU
Authority: CN
Inventors: 叶笃孟
Original assignee: ZHEJIANG JINGJI ELECTROMECHANICAL CO Ltd
Current assignee: ZHEJIANG JINGJI ELECTROMECHANICAL CO Ltd
Priority date: 2011-06-28
Filing date: 2011-06-28
Publication date: 2012-03-14
Anticipated expiration: 2021-06-28

Abstract

The utility model provides a chain wheel shaft component of a scraper conveyor. The chain wheel shaft component of the scraper conveyor comprises a core shaft supported by bearings and chain wheels sleeved on the core shaft, and is characterized in that the chain wheels are replaceable external chain wheels. Sprockets of the chain wheels of the scraper conveyor adopt the movable sprocket mounting mode and can be replaced after being damaged. Withdrawal lining sleeves on the bearings are mounted in wheel hubs and under gaps; when the bearings are mounted, heating is not needed, and the mechanical properties of materials are not influenced; and when the bearings are dismounted, all that is needed is to loosen tensioning nuts, so that the bearings can be dismounted, the surface strain of holes in a mounting shaft and the bearings is not liable to cause, and the service lives of the bearings are improved. Through the adoption of the two modes, the structure is simple, the manufacturing is convenient, the working is reliable, and the mounting and dismounting and the maintenance are simpler and more convenient, so that the replacement and maintenance time is greatly shortened, the user cost is lowered, and great economic benefits can be brought for users.

Description

Slat conveyer sprocket shaft assembly

Technical field

This practicality relates to a kind of new plate conveyer chain axle assembly, particularly relates to a kind of sprocket wheel external tooth that changes and moves back the slat conveyer sprocket shaft assembly that unloads lining with axle upper support bearing band.

Technical background

Slat conveyer is the continuous conveyor of a kind of flexible traction mechanism, is the machinery of arranging for coal-face and mining roadway fortune coal.Its driving component is a scraper chain, and bogey is an intermediate channel, and scraper chain is placed in the groove face of intermediate channel.The sprocket wheel of scraper chain pile warp head, tail is connected into dead front type and places intermediate channel, and is supporting with flitting and conveyer push unit, realizes coal breakage, coalings, transports coal and moving conveyor toolization.All can in chute, coaling along the conveyer total length, the coal in the intermediate channel of packing into is dilatory by scraper chain, in intermediate channel, slides into the unloading end and unloads.Slat conveyer is made up of chain-drive section, drive end unit, intermediate channel and appurtenances thereof, scraper chain, chain tension adjusting device, push unit and anchor fitting etc.Chain-drive section mainly is made up of headstock, sprocket shaft assembly, retarder, blind axle, coupler and electrical motor etc.; Be the device of the transmission of power of electrical motor being given scraper chain, driving, unloading, connection and supporting head anchor fitting and push unit, the fixing function of coal-cutting machinery tow chain are arranged.

The sprocket shaft assembly is the force transferring part of chain-drive section, is made up of sprocket wheel and connecting cylinder.Sprocket shaft unit construction pattern is many, is the power element that is used for transmitting tractive power.General sprocket shaft assembly mainly is by mandrel, bearing, bearing seat, sprocket wheel, sealing member, passes through parts such as lid, axle sleeve and consist of an integral body.The mandrel middle part is equipped with sprocket wheel, and mandrel and sprocket wheel mainly lean on two flat keys to come transferring power and motion.The lubricating oil of sprocket shaft assembly is stored in the sprocket shaft group, and this kind lubricating method high lubricating effect can effectively prolong service life of Shaft assembly.Sprocket wheel is to adopt alloy steel to forge to form, and in order to strengthen its intensity and to increase the service life, it has been carried out the case hardening processing.Sprocket wheel is the main traction element of slat conveyer, because they are can be at high temperature, dust many and have under the harsh conditions such as corrosion and work, thereby in Coal Mechanical equipment, is widely used.But because the chain-drive instantaneous transmission ratio is non-constant, so sprocket wheel certain vibration of meeting generation in transmission process, thereby the slat conveyer overbalance of transmission in the course of the work caused.Go down for a long time can cause damage to sprocket teeth, when improper engagement phenomenon such as chain jamming occurring, and withdraw from use immediately please, otherwise improper impulsive force might cause retarder to beat tooth, and the generation of accident such as chain rupture.When the sprocket wheel wearing and tearing need to change, need to shut down, the sprocket shaft assembly is carried out disassembling, assembling and replacing, dismounting is inconvenience very, more can have influence on the ordinary production of coal and the economic benefit of factory when serious.Bearing and mandrel adopt the transition fit mode, and installation and removal are extremely difficult, need during dismounting to remove by force; This can cause the performance of mandrel and bearing to descend, and whenever tears the one-time mechanical performance open and also descend, and adds up successively; Be prone to cause the surface of mandrel to pull, reduce the service life of bearing.

The utility model content

The purpose of the utility model is to address the above problem, and a kind of improved slat conveyer sprocket shaft assembly is provided, and can change sprocket wheel external tooth and mandrel upper support bearing band and move back and unload lining, increases the service life.

Under the prerequisite that slat conveyer complete machine intensity meets the demands; Can drive element normal operation be the prerequisite that guarantees the slat conveyer normal operation; And the assembly of easy fault is the sprocket shaft assembly in the drive element; Because slat conveyer sprocket shaft assembly is in the running environment that coal, water surround, to realize the waterproof and dustproof sealing; Rotary seal under the gross pollution condition, higher to leak free layout, adjustment and maintenance requirement, the fault that the sprocket shaft assembly is prone to is bearing destruction, sprocket chain nest and the flank of tooth conquassation that bad seals, oil leak or pollution cause; Thereby cause its can not normal engaged, drive annular chains, and then cause chain rupture or jump accidents such as chain.In a single day the sprocket shaft assembly damages, and then whole slat conveyer also will be out of service.After the sprocket shaft assembly damaged, slat conveyer need be shut down the replacing sprocket wheel, need take the whole chain axle assembly apart when changing sprocket wheel and change, and unloading process complicacy and replacing time are long.The bearing of sprocket shaft assembly is positioned at the inboard supporting zone of chain road side plate fully, and force-bearing situation is good, at rigidity and the sprocket shaft assembly quality with minimizing bearing seat relative under the even load, sprocket shaft, there is certain influence in life-span of bearing.The bearing of sprocket shaft assembly adopts transition fit with axle, very inconvenience when after wearing and tearing, installing and removing.

For achieving the above object, the design of the utility model is: the utility model adopts the basic structure of the slat conveyer sprocket wheel that can change external tooth, is made up of sprocket body, sprocket, a plurality of attaching screw.Sprocket body and sprocket are for dividing the body structure (see figure 2); The structural shape of sprocket body is on the sprocket body cylindrical, to be processed with oval pin; Be processed with the knock hole of same shape on the sprocket, sprocket installs on the sprocket through knock hole, with attaching screw fixed chain wheels tooth; Like this, cause it can not normal engaged the time in sprocket chain nest and flank of tooth conquassation, slat conveyer need not shut down the replacing sprocket wheel; Only need back out the wearing and tearing sprocket, the sprocket teeth that more renews fast, unloading process is simple and the replacing time is short; Need not change sprocket body; Former chain wheel assembly does not need completely knocked down, has saved the time to the user, has brought great economic benefit.

Block bearing is equipped with at the mandrel both ends of former chain wheel assembly, bearing and mandrel transition fit.The utility model band moves back the basic structure (see figure 3) of the block bearing that unloads lining, is unloaded lining and forms with moving back by tapered bore bearing, and bearing is the national standard tapered bore bearing, and the taper hole tapering is 1:12 or 1:30, moves back to unload lining tapered bore bearing is installed on the cylindrical shaft.Move back the working accuracy that unloads lining and mandrel and require high-precision production tolerance unlike the interference fit that kind.Bearing installation is near shaft shoulder place, moves back to unload lining and be pressed into bearing bore by the axle upper nut, till bearing end-play is reduced to desired value, moves back that to unload lining easy to adjust, can wheel hub be adjusted to desired location easily on axle.Dismounting is during bearing, tightens another special nut and makes to move back and unload lining and withdraw from.Be applicable to that radial weight is bigger, the less double-row bearing of axial load is fixed on optical axis.Installation and removal are extremely convenient, during dismounting, can not cause the axle and the performance of bearing to descend, and are difficult for causing the surface of axle to pull, and improve the service life of bearing, and wearing and tearing back transmitting torque effect also can obviously improve.

According to above-mentioned design, the utility model adopts following technical scheme:

A kind of slat conveyer sprocket shaft assembly comprises the mandrel of bearing supporting and is sleeved on the sprocket wheel on the mandrel, it is characterized in that described sprocket wheel is for can change outer toothed chain wheel.

The above-mentioned structure of changing outer toothed chain wheel is: sprocket body and sprocket are for dividing body structure, and sprocket is fixed on the sprocket body through attaching screw.

Be processed with oval pin on the cylindrical of above-mentioned sprocket body; Be processed with knock hole on the described sprocket with this ellipse pin item coupling; On the said oval pin screw is arranged, it is the countersunk head socket head cap screw that the screw perforation that aligns with this screw, said attaching screw are arranged on the said sprocket; Pass said screw perforation and the said screw of precession, the realization sprocket is captiveed joint with sprocket body.

Be equipped with between above-mentioned mandrel and the bearing to move back and unload lining.

Above-mentioned bearing installation is near shaft shoulder place, has on the mandrel to revolve to join hold-down nut said moving back unloaded lining and be pressed into bearing bore.

Above-mentioned bearing is the national standard tapered bore bearing, and moving back and unloading the lining outside wall surface is conical suface and its coupling, unloads lining formation friction self-locking to moving back.

The utility model mainly is, bearing transition fit difficult mounting or dismounting loaded down with trivial details to changing behind the sprocket chain odontotripsis of slat conveyer and custom-designed a kind of frame mode, and breaking through in the maximum in the design is to have adopted the sprocket wheel that can change the gear teeth to unload lining with adopting to add to move back on the tapered bore bearing.The sprocket wheel sprocket of slat conveyer adopts the oscillating tooth mounting means, after sprocket teeth damages, can change sprocket easily.Move back on the bearing and unload lining and be installed in the wheel hub, it is installed under the gap, during installation, need not heating, to the not influence of mechanical characteristics of material; During dismounting, only need unscrew tightening nut, can get off bearing removal, be difficult for causing the surface in hole in installation shaft and the bearing to pull, improve the service life of bearing.The dual mode that more than adopts, simple in structure, easily manufactured, reliable operation, mounting or dismounting, safeguard all easier, thereby significantly reduced the replacing maintenance time and reduced user cost, can be the user and bring great economic benefit.

Description of drawings

Fig. 1 is the structure scheme of erection of the utility model sprocket shaft assembly.

Fig. 2 can change the structure scheme of erection of the scraper plate chain wheel construction pattern of external tooth for the utility model.

Fig. 3 moves back the basic structure of the block bearing that unloads lining for the utility model band.

The specific embodiment

the utility model preferred embodiment accompanying drawings should be as follows.

Embodiment one: referring to Fig. 1 and Fig. 2, thisSlat conveyer sprocket shaft assembly comprises the mandrel of bearing supporting and is sleeved on the sprocket wheel on the mandrel that described sprocket wheel is for can change outer toothed chain wheel.

Embodiment two: referring to Fig. 1, Fig. 2 and Fig. 3; Present embodiment and embodiment one are basic identical; Different is: described structure of changing outer toothed chain wheel is: sprocket body 33 is the branch body structure with sprocket 34, and sprocket 34 is fixed on the sprocket body 33 through attaching screw.Be processed with oval pin on the cylindrical of described sprocket body 33; Be processed with knock hole on the described sprocket 34 with this ellipse pin item coupling; On the said oval pin screw is arranged, on the said sprocket 34 screw perforation that aligns with this screw is arranged, said attaching screw 35 is the countersunk head socket head cap screw; Pass said screw perforation and the said screw of precession, realization sprocket 34 is captiveed joint with sprocket body 35.Be equipped with between described mandrel 5 and the bearing 15 to move back and unload lining 21.Described bearing 15 is installed near shaft shoulder place, has on the mandrel 5 to revolve to join hold-down nut 22 said moving back unloaded lining 21 and be pressed into bearing 15 endoporus.Described bearing 15 is the national standard tapered bore bearing, and moving back and unloading lining 21 outside wall surface is conical suface and its coupling, unloads lining 21 formation friction self-lockings to moving back.

Embodiment three:Present embodiment provides a kind of external tooth that changes to move back the slat conveyer chain wheel assembly that unloads lining with an axle upper support bearing band, whole chain wheel assembly (see figure 1) by bolt 1, packing ring 2, enclosing cover 3, seal ring 4, mandrel 5, flat key 6, screw 7, back-up ring 8, bolt 9, packing ring 10, float grease seal 11, cover 12 thoroughly, oil sealing 13, locating dowel pin 14, bearing 15, bearing seat 16, float grease seal 17, sprocket wheel 18, nest 19, seal ring 20, move back parts such as unloading lining 21, locknut 22, sheath 23, protecting cover 24, bolt 25, packing ring 26, plug 27, gland 28, screw 29 and form.When the whole chain wheel assembly is installed, earlier single or two flat key 31 usefulness socket head cap screws 32 are fixed on the mandrel 5, left sprocket wheel 18 corresponding keyways install on the mandrel 5; Seal ring 20 is inserted on the mandrel 5 with nest 19, aims at the oil through position, installs right sprocket wheel equally; With the float grease seal 17 symmetries sprocket wheel endoporus of packing into, both sides locating dowel pin 14 is installed to earlier on two side shaft holders 16, and bearing block assembly is comprised that bearing installation is to mandrel 5 in the chain wheel set both sides; Both sides float grease seal 11 is installed on the mandrel with back-up ring 8 axial location, and the left side is covered 12 thoroughly and prevented leakage of oil through oil sealing 13 sealed bearings, enclosing cover 3 with cover 12 thoroughly and be connected with packing ring 10 through bolt 9; Middle with seal ring 4 sealings; Enclosing cover 3 tops are provided with two oil inlets, and the bottom is provided with an oil drain hole, secure with bolt 1 and packing ring 2 usually; Covering thoroughly of right side 12 directly is connected with bearing seat 16, and screw 30, packing ring are fixed, and sheath 23 directly is enclosed within the castellated shaft side of mandrel 5, plays the protection spline.28 sealings of plug 27 usefulness seal rings, the logical hydraulic fluid port in middle part of blocking mandrel 5 is terminal, blocks with gland 29, and protecting cover 24 usefulness bolts 25 directly are connected on the mandrel 5 with packing ring 26, push down sheath 23.

Sprocket wheel 18 left and right sides two parts are the bearing block support structure, and the whole chain axle assembly leans on locating dowel pin 14 to be connected on the matrix.Bolt 9, packing ring 10 compress the effect that connects enclosing cover 3, and seal ring 4 sealing enclosing covers 3 prevent leakage of oil.Two side bearings 15 are in the seal cavity; A certain amount of lubricating oil is housed in seal cavity; Mandrel 5 is a quill shaft, and has a plurality of through holes to connect each other on the axle, has increased the storage space of lubricating oil like this; Left and right sides two parts are communicated, the sufficient lubrication of bearing has been played certain effect with preventing the temperature rise of lubricating oil.Float grease seal 11 belongs to dynamic mechanical seal mode with float grease seal 17 these type of sealings, generally is made up of the floating ring of ferroalloy materials and supporting government rubber O-ring seals, and floating ring uses in pairs, and one with the turning unit rotation, and one static relatively.Receive the distortion after the axial compression by O-ring seals, produce thrust, play good sealing effectiveness the floating-ring seal end face.The male splines part of sheath 23 protection mandrels 5; The male splines at mandrel 5 two ends partly is subsequent use coupling part, and protecting cover 24 leans on bolt 25 and packing ring 26 to be connected on the mandrel 5, and gland 29 blocks plug 27; Seal ring 28 is housed on the plug 27, prevents that mandrel 5 internal lubrication oil from leaking outside.The structural shape of sprocket wheel 18 is made up of sprocket body, sprocket, a plurality of attaching screw.Endoporus is processed with keyway and oil through on the sprocket body, and flat key is housed on the keyway, mainly plays connection chain wheel body and mandrel transmitting torque.Center of symmetry with nest is the center; Left and right sides sprocket wheel, float grease seal, bearing block assembly, pass through lid and be contained in both sides respectively, left end is respectively installed on the bearing block assembly with outer hexagonal bar iron of enclosing cover and packing ring, and the right-hand member sheath is sleeved on the mandrel castellated shaft; Protecting cover blocks plug and gland; Adjust seal ring, bolt, nut screwing clamping are formed a whole set of sprocket shaft assembly.

Sprocket body 33 is branch body structure (see figure 2) with sprocket 34; The structural shape of sprocket body 33 is on sprocket body 33 cylindricals, to be processed with oval pin; Be processed with the knock hole of respective shapes on the sprocket 34; Sprocket 34 installs on the sprocket body 33 through knock hole, with attaching screw 35 fixed chain wheels teeth 34; Like this, cause it can not normal engaged the time in sprocket wheel 18 chain nests and flank of tooth conquassation, slat conveyer need be shut down the replacing sprocket wheel; Only need back out wearing and tearing sprocket 34, the sprocket 34 that more renews fast, unloading process is simple and the replacing time is short; Need not change sprocket body 33; Former sprocket shaft assembly does not need completely knocked down, has saved the time to the user, has brought great economic benefit.

What bearing seat in-to-in bearing 15 adopted is Biserial cylindrical roller bearing, and bearing is the national standard tapered bore bearing, and the taper hole tapering is 1:12 or 1:30, and bearing 15 unloads lining 21 tapered bore bearing is installed on the cylindrical mandrel 5 by moving back.Bearing 15 is installed near shaft shoulder place, moves back to unload lining 21 and be pressed into bearing 15 endoporus by mandrel 5 upper nuts 22, till bearing 15 end-plaies are reduced to desired value.Self-locking so pinch device is also unlikely to get loose even take off, can be taken off hold-down nut 22 so relievedly because dismounting lining 21 leans on the friction of its conical suface, uses captive nut instead to replace, and compresses and will dismantle lining 21.During the dismounting bearing, unscrew hold-down nut 22 dismounting lining 21 is withdrawed from.Be applicable to that radial weight is bigger, the less double-row bearing of axial load is fixed on optical axis.Installation and removal are extremely convenient, during dismounting, can not cause the mandrel 5 and the performance of bearing 15 to descend, and are difficult for causing the surface of mandrel 5 to pull, and improve the service life of bearing 15, and wearing and tearing back transmitting torque effect also can obviously improve.

Claims

1. a slat conveyer sprocket shaft assembly comprises the mandrel (5) of bearing (15) supporting and is sleeved on the sprocket wheel (18) on the mandrel (5), it is characterized in that described sprocket wheel (18) is for can change outer toothed chain wheel.

2. slat conveyer sprocket shaft assembly according to claim 1; It is characterized in that described structure of changing outer toothed chain wheel is: sprocket body (33) is the branch body structure with sprocket (34), and sprocket (34) is fixed on the sprocket body (33) through attaching screw.

3. slat conveyer sprocket shaft assembly according to claim 2; It is characterized in that being processed with oval pin on the cylindrical of described sprocket body (33); Be processed with knock hole on the described sprocket (34) with this ellipse pin item coupling; On the said oval pin screw is arranged, said sprocket has the screw perforation that aligns with this screw on (34), and said attaching screw (35) is the countersunk head socket head cap screw; Pass said screw perforation and the said screw of precession, realization sprocket (34) is captiveed joint with sprocket body (35).

4. slat conveyer sprocket shaft assembly according to claim 1 is characterized in that being equipped with between described mandrel (5) and the bearing (15) to move back unloading lining (21).

5. slat conveyer sprocket shaft assembly according to claim 4 is characterized in that described bearing (15) is installed near shaft shoulder place, has on the mandrel (5) to revolve to join hold-down nut (22) said moving back unloaded lining (21) and be pressed into bearing (15) endoporus.

6. slat conveyer sprocket shaft assembly according to claim 5 is characterized in that described bearing (15) is the national standard tapered bore bearing, and moving back and unloading lining (21) outside wall surface is conical suface and its coupling, unloads lining (21) formation friction self-locking to moving back.