CN1228063A

CN1228063A - Handrail drive for passenger conveyor

Info

Publication number: CN1228063A
Application number: CN 96180425
Authority: CN
Inventors: K·瓦尔鲍姆; J·奥斯特尔梅尔; K·皮特施
Original assignee: Otis Elevator Co
Current assignee: Otis Elevator Co
Priority date: 1996-09-03
Filing date: 1996-09-03
Publication date: 1999-09-08
Anticipated expiration: 2016-09-03
Also published as: CN1086673C

Abstract

A handrail drive for a passenger conveyor includes a drive belt that does not emcompass either the main drive shaft or the handrail drive shaft. In a particular embodiment, the drive belt includes a plurality of outwardly extending teeth and is formed from a reinforced elastomeric material. The teeth are engaged with complementary toothed extensions on the main and handrail drive shafts. Two pairs of deflection rollers maintain contact between the drive belt and drive shafts and an adjustable spring maintains tension in the drive belt.

Description

The handrail drive of passenger conveyors

The present invention relates to passenger conveyors, relate in particular to the handrail drive of this conveyer.

A kind of representative type handrail drive that is used for passenger conveyors comprises a pair of by axle bonded assembly power wheel.This power wheel and handrail engagement provide displacing force to handrail.Described axle is by the drive chain transmission, and described drive chain is connected with main driving axle and the sprocket wheel through being fixed on the every axle is connected with the handrail axle.Like this, the pedal of passenger conveyors or supporting plate and handrail are by with identical speed transmission.

Handrail drive is that also often keep in repair with passenger conveyors in a public problem source.Sprocket wheel on drive chain and the axle needs lubricated all the time to keep normal running and to reduce abrasion.This necessary work has increased the maintenance cost of passenger conveyors.Even good lubricating arranged, chain also weares and teares along with use.Wearing and tearing cause passenger conveyors extra vibration and noise of when running.Chain must be changed in case of necessity.Pulling down the worn-down drive chain and changing a new chain is a time-consuming and expensive job.Obviously, passenger conveyors does not move between the stage of replacement, makes troubles for possible passenger.

In view of above-mentioned technology, the scientists and engineers is is just researching and developing the handrail drive with minimum maintenance cost and vibration under applicant's bailee's leader.

According to the present invention, handrail drive comprises a driving band, and described driving band engages but do not center on main driving axle or handrail transmission shaft.

Driving band has not improved the maintainability of handrail drive around the result of transmission shaft.Driving band is easy to be removed and changes and do not interfere transmission shaft.

According to a specific embodiment of the present invention, handrail drive comprise a pair of and each handrail ingear power wheel, one and described power wheel bonded assembly axle and with handrail transmission shaft and imput shaft ingear driving band.Described driving band is made by a kind of elastomeric material and is comprised complementary teeth ingear tooth on outward extending and the transmission shaft.The two pairs of deflection roll and driving band engagement.First pair is positioned near the main driving axle, with the abundant engagement between the tooth that guarantees driving band and main driving axle; Second pair is positioned near the handrail transmission shaft, to guarantee the abundant engagement between driving band and the handrail transmission shaft.Adjustable belt stretcher and driving band engagement.

It is noise when having the vibration that reduced and operation that this specific embodiment brings the advantage of handrail drive.Compare with the physical constraints that the messenger chain that uses prior art occurs, above-mentioned specific embodiment provides and has used the more chance of the tooth of fine pith.It is minimum that the vibration that littler pitch will produce reduces to.In addition, described specific embodiment does not need to lubricate, and compares with the chain-drive handrail drive that needs are lubricated, and this feature reduces to minimum with the service expenditure of handrail drive.

The following detailed description to exemplary embodiment of the present with reference to the accompanying drawings will more be understood above-mentioned and other purpose, characteristics and advantage of the present invention.Wherein:

The lateral plan of Fig. 1 movable sidewalk biopsy cavity marker devices;

The transparent view of the handrail drive of Fig. 2 movable sidewalk;

The lateral plan of Fig. 3 handrail drive;

The lateral plan of Fig. 4 driving band, axle and deflection roll engagement place.

Fig. 1 represents a movable sidewalk 12, and it comprises that a framework 14, has step chain 18 and a plurality of being linked in sequence and forms the pedal assembly 16 of the pedal 22 of continuous loop, the main drive 26 and a pair of upwardly extending guardrail 28 in both sides at pedal 22 of pedal 22.The part of above-mentioned pedal ring exposes so that passenger's feed surface 24 to be provided.In described framework 14, install one and move this handrail drive 34 handrail 32 usefulness.

Main drive 26 comprises machine 36 that displacing force is provided, by the main driving axle 38 of machine 36 transmissions be installed in a pair of driving chain wheel 42 at main driving axle 38 two ends.Each sprocket wheel 42 and step chain 18 engagements, the rotation of main driving axle 38 and sprocket wheel 42 causes that pedal assembly 16 moves through its running way.

Referring to Fig. 2, handrail drive 34 comprises a driving band 44, two pairs of deflection roll 46, stretching device 48, a handrail transmission shaft 52 and a pair of handrail power wheels 54 that are installed in handrail transmission shaft 52 two ends.Driving band 44 is connected with handrail transmission shaft 52 with main driving axle 38, so that with moved further pedal assembly 16 with this is to handrail 32.Described handrail power wheel 54 is provided with by traditional approach and handrail 32 ingear mechanisms, so that displacing force is passed to handrail 32.

Driving band 44 is elastic body belts of strengthening, has outside tooth 56.Profile of tooth salient 58 engagements of the complementation on driving band 44 toothed outside faces and every axle 38,52 (see figure 4).The size of tooth and pitch can change according to specific application.Yet should be noted that vibration and noise when making the tooth pitch minimum can make the handrail drive operation reduce to minimum.The inside face 62 of driving band engages with each deflection roll 46.

Described deflection roll 46 is installed on the stretching device 48, is used for rotating and deflection driving band 44, so that fully contact with the tooth-like protrusion 58 of axle 38,52.Fully contact the undue wear that the engagement that is meant between driving band 44 and the

transmission shaft

38,52 does not have slip and driving band 44.

Referring to Fig. 3, stretching device 48 comprises a framework 64, an adjustable springs 66 and an arm 68.Framework 64 is supporting deflection roll 46 and spring 66.Arm 68 comprises that one is used for installation end 72 that is pivotable and the other end 74 that engages with spring 66 on framework 64.A deflection roll 46 is installed on the arm 68, and spring 66 provides the power of pusher arm 68 to rotate around first end 72.This turning effort provides a constant tension force on driving band 44.Because spring can be regulated by traditional approach, so the tension force of driving band 44 can change by regulating spring power.Suitable tension force size depends on the type of driving band, the size of tooth and the engagement between driving band and the axle.Too little tension force can cause the slip of driving band on axle, and too big tension force can cause the unsuitable wearing and tearing of driving band.

Can implement pulling down and installing of driving band 44 by following mode.Because handrail drive 34 is positioned at the central authorities of framework 14, and one or more pedal 22 is pulled down so that near handrail drive 34 from pedal assembly 16.Can slide with regard to removable underdrive band 44 from deflection roll 46 until driving band 44 by unclamping a deflection roll 46.Can use the deflection roll 46 that is installed on the arm 68, regulating spring 66 is to remove the tension force on the driving band 44 for this reason.Then, driving band 44 and another roller 46 and tooth-like protrusion 58 jump out of meshs.Driving band 44 is not that driving band 44 need not cut off and also need not pull down

transmission shaft

38,52 around the result of

transmission shaft

38,52.

Identical step is adopted in the installation of new driving band 44, just reversed in order.New transmission band 44 and tooth-like protrusion 58 and deflection roll 46 engagements.Regulate adjustable spring 66 then, driving band 44 is applied tension force, until reaching suitable tension force.At this moment the installation of new transmission band 44.Make to install because driving band 44 not around

transmission shaft

38,52, does not therefore need to pull down

transmission shaft

38,52 again and simplify.The pedal of pulling down in the time of will beginning at last 22 is mounted in the pedal assembly 16 again.

Because driving band 44 is made by the spring body material maintenance of handrail drive 34 is simplified.Different with messenger chain of the prior art, this class driving device does not need to lubricate during use.

Embodiment shown in Fig. 1-3 is the passenger conveyors of movable sidewalk type, only is used for serve exemplary purposes.Handrail drive of the present invention also can be used for the passenger conveyors such as the escalator of other type.

Though according to exemplary embodiment diagram with described the present invention, those skilled in the art should understand that and to do various modifications, omission and interpolation and not break away from the spirit and scope of the present invention the present invention.

Claims

1. handrail drive that passenger conveyors is used, described passenger conveyors comprise a band main driving axle main drive and a pair of armrests, and described handrail drive comprises:

With each handrail ingear device;

One handrail transmission shaft; With

One with main driving axle and handrail transmission shaft ingear driving band so that rotate described transmission shaft synchronously, wherein, main driving axle and handrail transmission shaft are not centered on by driving band.

2. according to the handrail drive of claim 1, wherein, comprise a pair of power wheel with each handrail ingear device, each power wheel and this are to a handrail engagement in the handrail, and the handrail transmission shaft extends between the described power wheel.

3. according to the handrail drive of claim 1, wherein, main driving axle and handrail transmission shaft have a plurality of outward extending teeth, and wherein driving band has a plurality of from outward extending tooth of driving band and the complementary and engagement with the tooth of transmission shaft.

4. according to the handrail drive of claim 1, wherein, driving band is made by a kind of elastomeric material.

5. according to the handrail drive of claim 1, also comprise one first pair be installed near the main driving axle and be installed near the handrail transmission shaft with driving band ingear deflection roll and one second pair and with driving band ingear deflection roll, and the mechanism of tensioning driving band.

6. according to the handrail drive of claim 5, wherein, stretching device is adjustable.