KR100826727B1 - Drive unit for escalators or moving sidewalks - Google Patents

Abstract

The present invention is a passenger conveyor (2) with a movable belt (4), comprising a frame (6) and at least one movable belt drive wheel mounted to the frame (6) and connected to the drive shaft (10) and the drive shaft. A drive unit including a main drive belt drive 12 and a drive motor 16 and a step-down gear 18 for driving the main drive belt drive 12; The output side of 18 is connected to the input side of the main movable belt drive 12. In the present invention, the drive motor 16 is mounted on the housing of the step-down gear 18, the drive motor 18 and the step-down gear 18 form the drive unit 8, and the drive unit 18 ) Is supported by the main movable belt drive (12).

Drive motor, Step-down gear, Main drive belt drive, Passenger conveyor, Toothed wheel gear, Spur gear, Passenger conveyor

Description

DRIVE UNIT FOR ESCALATORS OR MOVING SIDEWALKS}

TECHNICAL FIELD The present invention relates to a passenger conveyor with a movable belt, in particular an output side of a main movable belt drive wheel and a step-down gear that incorporates a frame and at least one movable belt drive wheel mounted on the frame and connected to the drive shaft and the drive shaft. An escalator or moving walkway with a passenger conveyor composed of a drive unit for driving a main drive belt drive including a drive motor and a step-down gear connected to an input side of the main drive belt drive.

Various passenger conveyors of this type are currently in use. The movable belt represents the passenger conveyance element of the passenger conveyor. Passengers are transported along the exposed surface of the movable belt while standing or walking. In the escalator, the movable belt is also called a step belt. The step belt consists of several steps connected to each other by a step chain. The main movable belt drive is typically provided in one of the reverse regions of the movable belt, typically including two chain wheels for driving the movable beet that engages the step chain. The main movable belt drive is driven by the drive unit.                 

In the moving walkway, the movable belt is formed by respective pellet bodies connected to each other. As a result, the movable belt is also called a pellet belt in these cases. The pellet bodies are connected to each other by transfer chains similar to escalators and are driven by the main drive belt drive. However, there are also moving walkways where the movable belt extends continuously along the length of the movable belt, for example, a reinforced plastic material in which in each case no steps or pellets are provided. do. These moving walkways are also driven by a main movable belt drive arranged in one of the reverse zones.

The drive unit for driving the main movable belt drive often incorporates a drive motor to which the first end of the step-down gear is directly connected. Brakes for the passenger conveyor are also often arranged in the area of the drive motor. The drive motor is usually mounted on the frame of the passenger conveyor with the first end of the step-down gear. The output side of the first stage of the step-down gear drives the main drive belt drive via a so-called intermediate gear. The intermediate gear usually consists of a chain gear or toothed wheel gear. Since the intermediate gear is usually required to apply a certain distance, this can easily be achieved with a chain gear. In other words, the distance applied can be easily achieved with a slightly longer chain. Intermediate gears designed in the form of toothed wheel gears usually include several intermediate wheels of uniform size and consequently do not require gear deceleration. Chain gears are commonly used in so-called department store systems, for example department stores, malls, shopping arcades or even office buildings. So-called transportation systems where chain gears are used in public transport zones, for example railway stations, airports, subway stations, etc., need to meet much higher requirements than systems used for commercial purposes. Intermediate gears achieved in the form of toothed wheel gears are usually used in transportation systems.

All known embodiments of such systems have some disadvantages. First, a series of respective parts are positioned relative to each other and need to be mounted separately on the frame. In particular, mounting the drive motor separately on the frame will cause further vibrations within the frame, resulting in undesirable noise. Mounting the drive motor separately also has the disadvantage that the parts need to be adjusted respectively with respect to each other. This adversely affects the increase in assembly costs, ie the competition. In addition, separate housings are required for each of the parts, respectively. This leads to additional material requirements and increased costs.

As a result, the present invention is based on the goal of designing a passenger conveyor of the type described initially in such a way that it is designed to suppress vibrations from the drive motor in the frame and to allow the passenger conveyor to be produced easily and inexpensively.

According to the invention, this object is characterized by the fact that the drive motor is mounted on the housing of the step-down gear while the drive motor and the step-down gear form a drive unit, and the drive unit is supported by the main movable belt drive. That is achieved by a passenger conveyor. The brake is also preferably integrated into the drive unit. For example, the brake may be arranged between the drive motor and the step-down gear in the form of a separate component or integrated into the drive motor or step-down gear.

Compared with the construction of the prior art, it can be easily seen that only one gear is achieved in place of two separate step-down gears which achieves a full gear reduction. The drive motor is mounted on the housing of the present gear. In this case, if necessary, a brake can be arranged between the step-down gear and the drive motor. As a result, mounting the drive motor directly on the frame is no longer necessary, and vibrations in the frame are significantly reduced. If applicable, the brake as well as the step-down gear and drive motor result in an integral drive unit. An additional feature can be seen in that this integral drive unit is directly supported by the main movable belt drive. The drive unit can be completely preassembled in the form of only one component. No specific adjustment of this drive unit is required. In particular, the drive unit is designed such that the housing of the step-down gear simultaneously forms an end shield for the rotor of the drive unit. In this case, in particular, it is advantageous if the housing of the step-down gear simultaneously forms the housing of the brake. Alternatively, the housing of the drive motor can be connected with the housing of the step-down gear by conventional connecting elements. While assembling the passenger conveyor, the entire drive unit can be mounted on the main drive belt drive. Depending on the type of mounting, no fine adjustments or any adjustments are required as described in detail below.

The drive unit is preferably supported by the shaft of the main movable belt drive. The axis of the main movable belt drive may comprise, for example, a longitudinal tooth that fits into a corresponding tooth on the step-down gear output side. In this case, the drive unit is only pushed onto the drive shaft of the main movable belt drive and is tightened without being loosened by, for example, bolting or keying.

Alternatively, the housing of the drive unit is for example connected to the support structure of the main drive belt drive and is for example firmly bolted onto the structure. In this type of configuration, any alignment is necessary to ensure complete power flux from the drive motor to the main drive belt drive via the step-down gear. For example, if the step-down gear is not mounted on the main drive belt drive in a precisely aligned manner, misalignment occurs between the rotating parts, resulting in increased wear. In contrast to the cases in which the drive unit is supported by the drive shaft of the main movable belt drive, this type of configuration requires some adjustments.

The torque support is preferably provided between the frame of the passenger conveyor and the drive unit. For example, the torque support can be started in the drive motor or in the housing of the step-down gear. In particular, the torque support is required in configurations in which the drive unit is supported only by the drive shaft of the main movable belt drive. However, due to the longer lever arms, this design also has an advantage in the configuration in which the drive unit is also connected on the main drive belt drive, for example its support frame. The torque support may be directly connected to the frame of the passenger conveyor. However, such a connection can also be achieved indirectly by means of the components arranged there between. In extreme cases, the torque support may also be designed separately. If necessary, this can also be achieved for buildings in which a passenger conveyor is mounted.

An elastic torque support is preferably provided. For example, such torque support may be composed of conventional shock absorbers or coil spring shock absorbers, for example as used in large quantities in the automotive industry. Parts of this type are particularly advantageous in terms of cost. Insulators composed of polymeric vibration isolators or rubber insulators or other suitable elastic materials may be considered for this purpose.

The step-down gear is preferably achieved in the form of a toothed wheel gear. Toothed wheel gears are usually more suitable for carrying high loads. In addition, toothed wheel gears have a lower maintenance cost. This is of particular advantage for the integral configuration of the drive unit. Particular preference is given to step-down gears having three stages. The most suitable step-down gear consists of a first stage consisting of a conical gear which functions to rotate the axis of rotation by 90 °, a spur gear in which the direction of the axis of rotation does not change, i.e. the axis of rotation is merely moved in parallel from one end to the other. It consists of a step-down gear having three stages of the second stage and the third stage of the step-down gear consisting of.

The required gear reduction ratio can be achieved in a way with particular advantages with a step-down gear comprising three stages. The speed of a typical drive motor, for example a typical rotational speed of a four pole asynchronous motor, will lie at approximately 1500 rpm at a supply frequency of 50 Hz. At the same frequency, the six pole asynchronous motor has a rotation speed of approximately 1000 rpm. Rotational speeds on the order of 10 rpm are suitable for driving the main drive belt drive, so it is necessary to achieve a gear reduction ratio of approximately 120: 1. Particularly preferred step-down gears are conical gears having a gear reduction ratio of approximately 6: 1 as the first stage, first gear reduction stages having spur gears having a gear reduction ratio of approximately 4: 1 and gear reduction ratios of approximately 6: 1. It includes a second gear reduction stage having a spur gear having a. This results in an overall gear reduction ratio of approximately 120: 1. The conical gear may preferably be composed of hypoid bevel gears or other types of conical gears.

Alternatively, the step-down gear may consist of a chain gear or a combination of toothed wheel gear and chain gear.

The housing of the step-down gear is preferably divided into different chambers to allow the use of different lubricants for different gear stages. It is very natural that high speed gears require a higher quality lubricant than low speed gears. Similarly, gears with high power density require correspondingly good lubrication. For example, high speed gears are preferably provided with oil lubrication, and grease lubrication is often suitable for low speed gears. If conventional lubrication is provided for all gear stages, the gear stage with the highest requirements determines the quality of the lubricant and the lubricant change interval. If the step-down gear is divided into different chambers, it is possible to select an appropriate lubricant for each chamber. Due to this measure, the requirements for high cost and high quality lubricants can be significantly reduced. The lubricant replacement interval of the two chambers can be adopted for each other in such a way that no additional maintenance costs are required by selecting the chamber size and appropriately employing each lubricant with respect to each other.

It is preferred that the first chamber is provided at the first and second gear stages, while the second chamber is provided at the third stage.

Each module comprising a first stage of the step-down gear and a drive motor, respectively, can be connected to the final toothed wheel of the gear train at which the output of the step-down gear occurs. If the first chamber is provided at the first and second gear stages and the second chamber is provided at the third stage, this can be achieved in a particularly simple manner. The option of connecting several individual modules with the drive motor and the first stage of the step-down gear to the final toothed wheel of the gear train is a drive for any size passenger conveyor with only a few identical parts, depending on the module concept. Makes it possible to achieve a unit. It is natural that passenger conveyors with short or low transport heights require significantly lower drive power than passenger conveyors with long or high transport heights. To date, drive motors with different power ratios have been used for different power requirements. Separate gear sizes are produced for each power ratio of the drive motors. The manufacture and storage of these parts is correspondingly expensive. The proposed module design according to the present invention is based on the optional toothed wheel of the gear train in a housing with several connection options, and any two different parts of the module with the first stage of the step-down gear and the drive motor. It is possible to achieve a drive unit for the power ratio.

The drive of the step-down gear is preferably connected to the axis of the main drive belt drive.

The final toothed wheel of the gear train is preferably directly connected to the movable belt drive wheel of the main drive belt drive. This embodiment provides the advantage that in extreme cases the final toothed wheel of the gear train and the movable belt drive wheel of the main drive belt drive can be achieved in one piece. Since the two parts often have the same diameter, manufacturing can be simplified in many cases with this measure.

The invention is also characterized in that the drive motor is mounted on the step-down gear for a passenger conveyor with a movable belt comprising a drive motor and a step-down gear connected to the main drive belt drive. It relates to a drive unit.

The invention is explained in more detail below with reference to one embodiment shown in the drawings.

1 shows the essential parts of a passenger conveyor according to the invention.

2 is a schematic view of a drive unit used for a passenger conveyor according to the present invention.

Essential parts of the passenger conveyor 2 according to the invention are shown schematically in FIG. 1. The drive shaft 10 of the main movable belt drive 12, as well as the movable belt 4, the part of the frame 6 and the cross section of the drive unit 8 are shown in the figure.

When the passenger conveyor 2 is configured as a moving walkway, the movable belt 4 may be composed of a pellet belt or an endless movable belt. When the passenger conveyor 2 is configured by an escalator, the movable belt 4 may be configured as a step belt. . In any case, the movable belt 4 is driven by the main movable belt drive 12. The main movable belt drive 12 comprises at least one movable belt drive wheel (not shown) consisting of, for example, a chain wheel engaged into the drive chain of the movable belt 4. Two movable belt drive wheels mounted on a conventional drive shaft 10 are usually provided, ie one movable belt drive wheel is arranged on each side of the movable belt 4.

The movable belt drive shaft 10 is mounted on the frame 6 of the passenger conveyor 2 with the bearing 14 as shown in the lower part of FIG. Alternatively, the main drive belt drive 12 may comprise a separate support frame mounted on the frame 6 of the passenger conveyor 2.

The drive shaft 10 of the main movable belt drive 12 is driven by the drive unit 8. The drive unit 8 comprises a drive motor 16, a brake 17 and a step-down gear 18. For example, the drive motor 16 may be configured as a conventional four pole or six pole asynchronous motor. At a supply frequency of 50 Hz, motors of this type operate at rotational speeds of approximately 1000 to 1500 rpm. The step-down gear 18 is preferably arranged in the closed housing. Step-down gears usually provide a gear reduction ratio of approximately 120: 1. Other gear reduction ratios may also be considered depending on the operating frequency, drive motor and application.

The drive motor 16 is mounted on the housing 22 of the step-down gear 18 by a brake 17. It can be seen that the drive motor is substantially cylindrical and its longitudinal axis is arranged to be positioned on an extension line in the direction in which the step-down gear extends. Although it is necessary to rotate the direction of rotation by 90 ° between the drive motor 16 and the drive shaft 10, this provides the advantage that the mass distribution of the drive unit is essentially one-dimensional. This makes it possible to mount the drive unit on the main movable belt drive in which no moment needs to be absorbed around the direction in which the drive unit 8 extends. A significant moment around the direction in which the drive unit 8 extends is in the area where the drive unit 8 is mounted on the main drive belt drive 12 if the drive motor 16 is substantially parallel to the drive shaft 12. It is easy to see that it should be absorbed. This moment must also be transmitted by the housing of the step-down gear 18, ie the housing 22 must be realized appropriately and stably.

In the embodiment shown, the housing of the step-down gear 18 is mounted on the frame 6 of the passenger conveyor 2. In addition, the drive unit 8 is supported by the torque support 20 by the drive motor 16. In another configuration, the drive unit 8 is supported only by the drive shaft 10 of the main movable belt drive 12.

FIG. 1 clearly shows that the drive unit 8 usually protrudes into the upper mechanism region outside of the movable belt 4, rather than protruding below the movable belt 4. In contrast to the configuration in which the drive unit 8 is arranged between the front movable part and the rear movable part of the movable belt 4, this provides the advantage that, for example, the drive unit is easily accessible for manual operation. For example, manual manipulation may be required if passengers in the area of the movable belt need to be rescued after an emergency shutoff.

2 shows the step-down gear 18 of the drive unit 8 in an enlarged form. Also shown in this figure is a drive motor 16 in which the longitudinal axis of rotation is rotated by 90 ° with respect to the axis of rotation of the respective toothed wheels in the step-down gear 18. Conical gear 24, which includes a first conical gear wheel 26 and a second conical wheel 30, which forms a first end of the step-down gear and is mounted on gear shaft 28, is a step-down gear. Arranged in the housing 22. The smaller spur gear 32 that meshes with the larger spur gear 34 rotates with the second conical gear wheel 30 and the gear shaft 28. The spur gear 34 is fixed on the shaft 36. The two spur gears 32 and 34 form a second gear reduction stage 38. Another small spur gear 38 that meshes with another larger spur gear 40 that ultimately drives the drive shaft 10 at a predetermined rotational speed rotates with the spur gear 34 and the shaft 36. Respective gear axes are arranged in the housing 22 of the step-down gear in the corresponding bearing 42 schematically shown in this figure.

The first gear reduction stage 24 and the second gear reduction stage 38 are arranged in the first chamber 44, and the third gear reduction stage 48 formed by the spur gears 38, 40 is the second. While being arranged in the chamber 46, the step-down gear is divided into two chambers 44, 46. This makes it possible to provide separate lubrication for each of the two chambers 44, 46. In addition, this means that several modules, consisting of the drive motor 16, the first and second stages 24, 28 of the step-down gear, have a final toothed wheel 40 of the gear train, depending on the power options of the drive unit 8. This enables a particularly simple modular design of the drive unit 8 so that it can be connected to it. In extreme cases, some modules may be arranged around the final toothed wheel 40 of a gear train similar to a radial engine. The housing in which the final toothed wheel 40 of the gear train is accommodated may be provided with several openings, for example to which the respective modules can be connected. However, these openings need to be sealed if no module is connected to each opening.

The drive power can also be increased by connecting one respective drive unit 8 to both sides of the drive shaft 10 in the passenger conveyor 2.

It is relatively simple to achieve different gear reduction ratios for different applications and different drive motors 16 by varying the toothed wheels in the step-down gear 18. The drive unit 8 may also comprise, for example, the essential parts of the main drive belt drive 12. For example, the bearing arrangement for the drive shaft 10 can be integrated into the drive unit 8. In particular, if the final toothed wheel 40 is integrated with the movable belt drive wheel, it may also be considered to achieve a main movable belt drive that is integral with the drive unit 8.

The hand rail drive (not shown) may be driven by the final toothed wheel 40 or the movable belt drive wheel of the toothed wheel train. Alternatively, the pick-off wheel for the hand rail drive can be connected to the final toothed wheel 40 and / or the movable belt drive wheel, for example.

Claims (15)

Passenger conveyor 2 with movable belt 4, Frame 6, A main movable belt driving device 12 mounted to the frame 6 and including a driving shaft 10 and at least one movable belt driving wheel connected to the driving shaft; A drive unit including a drive motor 16 and a step-down gear 18 and for driving the main drive belt drive 12; The output side of the step-down gear 18 is connected to the input side of the main drive belt drive 12, The drive motor 16 is mounted on a housing of the step-down gear 18, the drive motor 16 and the step-down gear 18 form a drive unit 8, and the drive unit Passenger conveyor, characterized in that (8) is supported by the main movable belt drive (12). 2. Passenger conveyor according to claim 1, characterized in that the drive unit (8) is supported by a drive shaft (10) of the main movable belt drive (12). A passenger conveyor as claimed in claim 1 or 2, characterized in that a torque support (20) is provided between the frame (6) and the drive unit (8). A passenger conveyor as claimed in claim 1 or 2, characterized in that an elastic torque support (20) is provided. A passenger conveyor as claimed in claim 1 or 2, characterized in that the step-down gear (18) consists of a toothed wheel gear. Passenger conveyor according to claim 5, characterized in that the step-down gear (18) consists of a step-down gear with three stages. 7. The first stage 24 of the step-down gear 18 is comprised of a conical gear that functions to rotate the axis of rotation by 90 [deg.], And the second stage of the step-down gear 18. (38) and the third end (48) is a passenger conveyor, characterized in that consisting of spur gears that do not change the direction of the rotation axis. 3. The housing 22 of the step-down gear 18 is divided into different chambers 44 and 46 to allow the use of different lubricants for different gear stages. Passengers conveyor. 9. A first chamber (44) is provided in the first gear stage and the second gear stage (24; 38), and a second chamber (46) is provided in the third stage (48). Passengers conveyor. 3. The module of claim 1 or 2, wherein each of the modules comprising the first stage of the step-down gear 18 and the drive motor 16, respectively, is provided with an output of the step-down gear 18. A passenger conveyor, which can be connected to the final toothed wheel 40 of the gear train. A passenger conveyor as claimed in claim 1 or 2, characterized in that the output side of the step-down gear (18) is connected to the drive shaft (10) of the main drive belt drive (12). 3. Passenger conveyor according to claim 1 or 2, characterized in that the final toothed wheel (40) of the gear train is directly connected to the movable belt drive wheel of the main drive belt drive (12). A passenger conveyor as claimed in claim 1 or 2, characterized in that the direction of rotation of the drive motor (16) and the drive shaft (10) is substantially perpendicular to each other. A passenger conveyor as claimed in claim 1 or 2, characterized in that the drive unit is arranged outside the space defined by the front movable part and the rear movable part of the movable belt (4). A drive unit 8 for a passenger conveyor 2 with a movable belt 4 according to claim 1, wherein the drive unit is a step-down gear connected to the main movable belt drive 12. 18) and a drive motor (16), said drive motor (16) being mounted on said step-down gear (18).

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