Patent Description:
At present, the maximum lifting height that the existing escalator drive device can meet is only <NUM> meters or less, which can no longer meet market demand. In order to further increase the lifting height (such as increasing to <NUM> meters or higher), the number and/or power of the driving motors can only be increased.

However, increasing the power of the driving motor results in a significant increase in the size of the driving motor, which makes the original space used to accommodate the original driving motor unable to meet this requirement, and increasing the original space is not feasible in reality. Increasing the number of driving motors will also bring the problem that the original motor accommodation space cannot meet the requirements.

In order to further increase the lifting height, there is also a technical problem of the original structure of the driving spindle in the driving device being unable to adapt.

<CIT> discloses a passenger conveyor with two motors attached to a reduction gear. <CIT> discloses a drive part of an escalator.

<CIT> discloses driving means for escalators.

In order to solve one or more defects in the prior art, according to one aspect of the present invention, a driving device for escalator is provided, and comprising a first driving motor, a second driving motor, a third driving motor, a fourth driving motor, a driving spindle and a handrail belt spindle, wherein the first driving motor and the second driving motor are connected with a first gear box, and the third driving motor and the fourth driving motor are connected with a second gear box, the driving torque of the first driving motor and the second driving motor is transmitted to the driving spindle through the first gear box, and the driving torque of the third driving motor and the fourth driving motor are transmitted to the driving spindle through the second gear box, wherein the driving device further comprises at least one fifth driving motor and at least one sixth driving motor.

The fifth driving motor and the sixth driving motor are connected with at least one third gear box.

The driving torque of the fifth driving motor and the sixth driving motor is transmitted to the driving spindle and the handrail belt spindle through the third gear box.

According to the above aspects of the present invention, the fifth driving motor is arranged between the driving spindle and the handrail belt spindle.

The handrail belt spindle is arranged between the fifth driving motor and the sixth driving motor.

The third gear box is disposed between the first gear box and the second gear box and is disposed closer to the first gear box than the second gear box.

According to the above aspects of the present invention, in a direction parallel to an axis of the handrail belt spindle, the fifth driving motor and the sixth driving motor are both located between the handrail belt assemblies arranged on two axial ends of the handrail belt spindle.

According to the above aspects of the present invention, the third gear box comprises an output gear, a first input gear, a handrail belt spindle gear and a second input gear which are arranged in a housing of the third gear box.

The fifth driving motor drives the first input gear.

The sixth driving motor drives the second input gear.

The first input gear is matched with the output gear and the handrail belt spindle gear at the same time.

The second input gear is matched with the handrail belt spindle gear.

The driving torque of the fifth driving motor is transmitted to the driving spindle through the input gear and to the handrail belt spindle through the handrail belt spindle gear.

The driving torque of the sixth driving motor is transmitted to the handrail belt spindle through the handrail belt spindle gear.

According to the above aspects of the present invention, a spline structure is arranged on the outer circumferential surface of a part of handrail belt spindle.

The handrail belt spindle gear is provided with a handrail gear through hole, and a spline structure is arranged on the inner circumferential surface of the handrail gear through hole.

The handrail belt spindle is fitted in the handrail gear through hole, and the spline structure on the inner circumferential surface of the handrail gear through hole is fitted with the spline structure on the outer circumferential surface of the part of the handrail belt spindle.

According to the above aspects of the present invention, the handrail belt assembly are arranged on two axial ends of the handrail belt spindle.

The rotation of the handrail belt spindle drives the handrail belt assembly to move.

According to the above aspects of the present invention, the handrail belt spindle is also provided with a third sealing piece and a fourth sealing piece.

The third sealing piece and the fourth sealing piece are respectively and fixedly connected to two sides of the housing of the third gear box through fasteners.

According to the above aspects of the present invention, a spline structure is arranged on the outer circumferential surface of the first axial end of the driving spindle.

The output gear of the first gear box is provided with an output gear through hole, and the inner circumferential surface of the output gear through hole is provided with a spline structure.

The first axial end of the driving spindle is fitted in the output gear through hole of the output gear of the first gearbox, and the spline structure of the first axial end of the driving spindle is fitted with the spline structure of the output gear through hole.

According to the above aspects of the present invention, a first axial protrusion extending outward from the first axial end of the driving spindle.

A first axial end cap is fixedly fitted on the first axial protrusion through a fastener and abuts against the output gear of the first gear box.

According to the above aspects of the present disclosure, a first annular recess is arranged on the driving spindle adjacent to the first axial end of the driving spindle.

A first cylindrical section is arranged on the driving spindle adjacent to the first annular recess of the driving spindle.

A first ferrule is arranged on the outer circumferential surface of the first cylindrical section, and the first ferrule is located between an extended part of the output gear of the first gearbox and the outer circumferential surface of the first cylindrical section.

A first double-row roller bearing is arranged on the first cylindrical section.

A first spacer is arranged between an inner ring of the first double-row roller bearing and the extended part of the output gear of the first gear box.

The extended part of the output gear of the first gear box abuts against the inner ring of the first double-row roller bearing through the first spacer.

According to the above aspects of the present invention, a second cylindrical section is arranged on the driving spindle adjacent to the first cylindrical section of the driving spindle.

A first step sprocket assembly is fitted on the second cylindrical section.

The first step sprocket assembly comprises a step flange and a step sprocket, wherein the step sprocket is connected to the step flange through a fastener and is matched with the steps of the escalator.

The step flange is provided with a step flange through hole.

The step flange is matched with the spline structure arranged on the outer circumferential surface of the second cylindrical section through the spline structure arranged on the inner circumferential surface of the step flange through hole.

According to the above aspects of the present invention, a second ferrule is arranged on the outer circumferential surface of the first cylindrical section, and the second ferrule is located between the step flange and the outer circumferential surface of the first cylindrical section.

A second spacer is arranged between the inner ring of the first double-row roller bearing and the step flange.

The inner ring of the first double-row roller bearing abuts against the step flange through the second spacer.

According to the above aspects of the present invention, a third cylindrical section is arranged on the driving spindle adjacent to the second cylindrical section of the driving spindle.

A ring-shaped third spacer is arranged on the outer circumferential surface of the third cylindrical section.

Two single-row rolling bearings are respectively arranged on the outer circumferential surfaces of the two axial ends of the third spacer.

A first steering plate mounting part is arranged on the outer rings of the two single-row rolling bearings.

A first steering plate is installed on the first steering plate mounting part through convex-concave fit, and one of the step runner of the escalator is rolling fitted on the first steering plate.

The stepped flange abuts against the inner ring of one of the single-row rolling bearings and abuts against the third spacer.

A first stopper is connected to the first steering plate mounting part through a fastener and extends to the rolling body of another single-row rolling bearing along the radial direction of the third cylindrical section, thereby blocking the outer ring of the other single-row rolling bearing in the axial direction.

A first mounting part boss is arranged on the first steering plate mounting part.

A spacer boss facing the first mounting part boss is arranged on the third spacer.

The outer rings of the two single-row rolling bearings respectively abut against the two axial ends of the first mounting part boss.

The inner rings of the two single-row rolling bearings respectively abut against the two axial ends of the spacer boss.

According to the above aspects of the present invention, a fourth cylindrical section and a fifth cylindrical section are sequentially arranged on the driving spindle adjacent to the third cylindrical section of the driving spindle.

A fourth spacer in the shape of a ring is arranged on an outer circumferential surface of the fourth cylindrical section.

A first axial end of the fourth spacer is fitted on the third cylindrical section.

A second axial end of the fourth spacer is fitted on the fifth cylindrical section.

According to the above aspects of the present invention, the inner ring of the other single-row rolling bearing and the third spacer abut against the first axial end of the fourth spacer.

The output gear of the third gear box abuts against a step portion provided on the second axial end of the fourth spacer.

A first closing part is also arranged on the outer surface of the fourth spacer.

The first closing member is fixedly connected to the first side of the housing of the third gear box by fastener.

According to the above aspects of the present invention, a sixth cylindrical section is arranged on the driving spindle adjacent to the fifth cylindrical section of the driving spindle.

A spline structure is arranged on the outer circumferential surface of the sixth cylindrical section.

The output gear of the third gearbox is provided with an output gear through hole, and the inner circumferential surface of the output gear through hole of the output gear of the third gearbox is provided with a spline structure.

The sixth cylindrical section of the driving spindle is splined in the output gear through hole of the output gear of the third gearbox.

According to the above aspects of the present invention, a second annular recess is arranged on the driving spindle adjacent to the sixth cylindrical section of the driving spindle.

A seventh cylindrical section and an eighth cylindrical section are sequentially arranged on the driving spindle adjacent to the second annular recess of the driving spindle.

The output gear of the third gear box is fitted on the seventh cylindrical section and abuts against a step portion formed between the seventh cylindrical section and the eighth cylindrical section.

A second closing part is also arranged on the outer surface of the eighth cylindrical section.

The second closing member is fixedly connected to the second side of the housing of the third gear box by fastener.

According to the above aspects of the present invention, a spline structure is arranged on the outer circumferential surface of the second axial end of the driving spindle.

The output gear of the second gearbox is provided with an output gear through hole, and the inner circumferential surface of the output gear through hole is provided with a spline structure.

The second axial end of the driving spindle is fitted in the output gear through hole of the output gear of the second gearbox, and the spline structure of the second axial end of the driving spindle is fitted with the spline structure of the output gear through hole.

According to the above aspects of the present invention, a second axial protrusion extending outward from the second axial end of the driving spindle.

A second axial end cap is fixedly fitted on the second axial protrusion through a fastener and abuts against the output gear of the second gearbox.

According to the above aspects of the present invention, a third annular recess is arranged on the driving spindle adjacent to the second axial end of the driving spindle.

A ninth cylindrical section is arranged on the driving spindle adjacent to the third annular recess of the driving spindle.

A third collar is arranged on the outer circumferential surface of the ninth cylindrical section, and the third collar is located between an extended part of the output gear of the second gearbox and the outer circumferential surface of the ninth cylindrical section.

A second double-row roller bearing is arranged on the ninth cylindrical section.

A fifth spacer is arranged between the inner ring of the second double-row roller bearing and the extended part of the output gear of the second gearbox.

The extended part of the output gear of the second gear box abuts against the inner ring of the second double-row roller bearing through the fifth spacer.

According to the above aspects of the present invention, a tenth cylindrical section is arranged on the driving spindle adjacent to the ninth cylindrical section of the driving spindle.

A second step sprocket assembly is fitted on the tenth cylindrical section.

The second step sprocket assembly comprises a step flange and a step sprocket, wherein the step sprocket is connected to the step flange through a fastener and is matched with the steps of the escalator.

The step flange is matched with the spline structure arranged on the outer circumferential surface of the tenth cylindrical section through the spline structure arranged on the inner circumferential surface of the step flange through hole.

According to the above aspects of the present invention, a fourth collar is also arranged on the outer circumferential surface of the ninth cylindrical section, and the fourth collar is located between the step flange and the outer circumferential surface of the ninth cylindrical section.

A sixth spacer is arranged between the inner ring of the second double-row roller bearing and the step flange of the second step sprocket assembly.

The inner ring of the second double-row roller bearing abuts against the step flange of the second step sprocket assembly through the sixth spacer.

According to the above aspects of the present invention, an eleventh cylindrical section is arranged on the driving spindle adjacent to the tenth cylindrical section of the driving spindle.

An annular seventh spacer is arranged on the outer circumferential surface of the eleventh cylindrical section.

Two single-row rolling bearings are respectively arranged on the outer circumferential surfaces of the two axial ends of the seventh spacer.

A second steering plate mounting part is arranged on the outer rings of the two single-row rolling bearings.

A second steering plate is installed on the second steering plate mounting part through convex-concave fit, and another step runner of the escalator steps is rolled and matched on the second steering plate.

The stepped flange abuts against the inner ring of one of the single-row rolling bearings and abuts against the seventh spacer.

A second stopper is connected to the second steering plate mounting part through a fastener and extends to the rolling body of another single-row rolling bearing along the radial direction of the eleventh cylindrical section, thereby blocking the outer ring of the other single-row rolling bearing in the axial direction.

A second mounting part boss is arranged on the second steering plate mounting part.

A spacer boss facing the second mounting part boss is arranged on the seventh spacer.

The outer rings of the two single-row rolling bearings respectively abut against the two axial ends of the second mounting part boss.

According to the above aspects of the present invention, the seventh spacer abuts against a step portion formed between the eleventh cylindrical section of the driving spindle and the eighth cylindrical section of the driving spindle.

According to the above aspects of the present invention, the first driving motor and the second driving motor are connected with the first gear box through a gear transmission mechanism.

The third driving motor and the fourth driving motor are connected with the second gear box through a gear transmission mechanism.

The fifth driving motor and the sixth driving motor are connected with said at least one third gear box through a gear transmission mechanism.

According to the technical scheme of the present invention, the fifth and sixth driving motors are added to the driving device of the escalator, so that the total lifting power of the driving device is improved, and the requirement of increasing the lifting height can be met.

The size of each original driving motor remains unchanged, and there is no need to transform the original space for accommodating the original driving motors.

The added fifth driving motor is arranged between the driving spindle and the handrail belt spindle, thus making full use of the original unused space between the driving spindle and the handrail belt spindle.

The handrail belt spindle is arranged between and driven by the fifth and sixth driving motors, thereby increasing the driving torque that can be applied to the handrail belt spindle.

So far, in order that the detailed description of the disclosure herein can be better understood and the contribution of the disclosure to the prior art can be better realized, the disclosure has outlined the contents of the disclosure quite broadly. Of course, embodiments of the present disclosure will be described below and will form the subject of the appended claims.

Likewise, those skilled in the art will recognize that the concept on which this disclosure is based can be easily used as a basis for designing other structures, methods and systems for carrying out the several purposes of this disclosure.

Those skilled in the art will have a better understanding of this disclosure through the following drawings, and the advantages of this disclosure can be more clearly reflected. The drawings described here are only for illustrative purposes of selected embodiments, not all possible implementations, and are not intended to limit the scope of the present disclosure.

The following is a detailed explanation of the specific implementation according to the disclosed content, combined with various drawings.

<FIG> shows a three-dimensional schematic diagram of a driving device for an escalator according to an embodiment of the present disclosure, wherein the driving device comprises a first driving motor <NUM>, a second driving motor <NUM>, a third driving motor <NUM>, a fourth driving motor <NUM>, a driving spindle <NUM>, and a handrail belt spindle <NUM>. The first driving motor <NUM> and the second driving motor <NUM> are connected to a first gearbox <NUM> through their respective planetary gear trains (not shown). The third driving motor and the fourth driving motor are connected to a second gearbox <NUM> through their respective planetary gear trains.

Technicians in this field can understand that each planetary gear train can also be set in corresponding gearboxes.

The driving torques of the first and second driving motors <NUM> and <NUM> are transmitted to the driving spindle <NUM> through the first gear box <NUM>, and the driving torques of the third and fourth driving motors <NUM> and <NUM> are transmitted to the driving spindle <NUM> through the second gear box <NUM>.

The first gear box <NUM> and the second gear box <NUM> each include a respective input gear, an intermediate transmission gear (not shown) and an output gear. The first driving motor <NUM> and the second driving motor <NUM> are engaged with the corresponding input gears of the first gear box <NUM> and the second gear box through their respective planetary gear trains, and the driving torque is transmitted to the corresponding output gears through the corresponding intermediate transmission gears, and then to the driving spindle <NUM>.

As shown in <FIG> and <FIG>, the driving device further includes a fifth driving motor <NUM> and a sixth driving motor <NUM>.

The fifth driving motor <NUM> and the sixth driving motor <NUM> are connected with the third gear box <NUM> through respective planetary gear trains.

The driving torques of the fifth driving motor <NUM> and the sixth driving motor <NUM> are transmitted to the driving spindle <NUM> and the handrail belt spindle <NUM> through the third gear box <NUM>.

The fifth driving motor <NUM> is arranged between the driving spindle <NUM> and the handrail belt spindle <NUM>.

The handrail belt spindle <NUM> is arranged between the fifth driving motor <NUM> and the sixth driving motor <NUM>.

The third gear box <NUM> is disposed between the first gear box <NUM> and the second gear box <NUM> and is disposed closer to the first gear box <NUM> than the second gear box <NUM>.

The driving spindle <NUM> and the handrail spindle <NUM> are arranged in parallel with each other.

According to the above embodiment of the present disclosure, in the direction parallel to the axis of the handrail belt spindle <NUM>, the fifth driving motor <NUM> and the sixth driving motor <NUM> are both located between the handrail belt assemblies <NUM> provided at both axial ends of the handrail belt spindle <NUM>.

<FIG> also shows six braking devices acting on the first to sixth driving motors respectively.

According to the above embodiments of the present disclosure, as shown in <FIG> and <FIG>, a spline structure is provided on the outer circumferential surface of a first axial end <NUM>-<NUM> of the driving spindle <NUM>.

The output gear <NUM>-<NUM> of the first gear box <NUM> has an output gear through hole <NUM>-<NUM>, and a spline structure is provided on the inner circumferential surface of the output gear through hole <NUM>-<NUM>.

The first axial end <NUM>-<NUM> of the driving spindle <NUM> is fitted into the output gear through hole <NUM>-<NUM> of the output gear <NUM>-<NUM> of the first gear box <NUM>, and the spline structure of the first axial end <NUM>-<NUM> of the driving spindle <NUM> is fitted with the spline structure of the output gear through hole <NUM>-<NUM>.

According to the above-mentioned embodiments of the present disclosure, as shown in <FIG>, a first axial protrusion <NUM>-<NUM> extends outward from the first axial end <NUM>-<NUM> of the driving spindle <NUM>.

A first axial end cap <NUM>-<NUM> is fixedly fitted on the first axial protrusion <NUM>-<NUM> by fasteners and abuts against the output gear <NUM>-<NUM> of the first gear box <NUM>.

According to the above embodiments of the present disclosure, as shown in <FIG>, a first annular recess <NUM>-<NUM> is provided on the driving spindle <NUM> adjacent to the first axial end <NUM>-<NUM> of the driving spindle <NUM>.

A first cylindrical section <NUM>-<NUM> is provided on the driving spindle <NUM> adjacent to the first annular recess <NUM>-<NUM> of the driving spindle <NUM>.

On the outer circumferential surface of the first cylindrical section <NUM>-<NUM>, a first ferrule <NUM>-<NUM> is provided, which is located between the axial extension of the output gear <NUM>-<NUM> of the first gear box <NUM> and the outer circumferential surface of the first cylindrical section <NUM>-<NUM>.

The output gear <NUM>-<NUM> is supported by the driving spindle <NUM> at its two ends along the axial direction of the driving spindle <NUM> (for example, one end is supported by the first ferrule <NUM>-<NUM> and the other end is supported by the first axial end cap <NUM>-<NUM> provided on the driving spindle <NUM>), so that the spline structure of the first axial end <NUM>-<NUM> of the driving spindle <NUM> does not bear radial pressure, but only bears driving torque.

A first double-row roller bearing <NUM> is provided on the first cylindrical section <NUM>-<NUM>.

A first spacer <NUM>-<NUM> is provided between an inner ring <NUM>-<NUM> of the first double-row roller bearing <NUM> and the extended portion of the output gear <NUM>-<NUM> of the first gear box <NUM>.

The extended portion of the output gear <NUM>-<NUM> of the first gear box <NUM> abuts against the inner ring <NUM>-<NUM> of the first double-row roller bearing <NUM> through the first spacer <NUM>-<NUM>.

According to the above embodiments of the present disclosure, as shown in <FIG>, a second cylindrical section <NUM>-<NUM> is provided on the driving spindle <NUM> adjacent to the first cylindrical section <NUM>-<NUM> of the driving spindle <NUM>.

A first step sprocket assembly <NUM> is fitted on the second cylindrical section <NUM>-<NUM>.

The first step sprocket assembly <NUM> includes a step flange <NUM>-<NUM> and a step sprocket <NUM>-<NUM>, wherein the step sprocket <NUM>-<NUM> is connected to the step flange <NUM>-<NUM> through fasteners and cooperates with the steps <NUM> of the escalator.

The step flange <NUM>-<NUM> has a step flange through hole <NUM>-<NUM>.

The step flange <NUM>-<NUM> is matched with the spline structure provided on the outer circumferential surface of the second cylindrical section <NUM>-<NUM> through the spline structure provided on the inner circumferential surface of the step flange through hole <NUM>-<NUM>.

According to the above embodiments of the present disclosure, as shown in <FIG> and <FIG>, a second ferrule <NUM>-<NUM> is also provided on the outer circumferential surface of the first cylindrical section <NUM>-<NUM>, and the second ferrule <NUM>-<NUM> is located between the step flange <NUM>-<NUM> and the outer circumferential surface of the first cylindrical section <NUM>-<NUM>.

A second spacer <NUM>-<NUM> is provided between the inner ring <NUM>-<NUM> of the first double-row roller bearing <NUM> and the stepped flange <NUM>-<NUM>.

The inner ring <NUM>-<NUM> of the first double-row roller bearing <NUM> abuts against the step flange <NUM>-<NUM> through the second spacer <NUM>-<NUM>.

According to the above embodiments of the present disclosure, as shown in <FIG>, a third cylindrical section <NUM>-<NUM> is provided on the driving spindle <NUM> adjacent to the second cylindrical section <NUM>-<NUM> of the driving spindle <NUM>.

An annular third spacer <NUM>-<NUM> is provided on an outer circumferential surface of the third cylindrical section <NUM>-<NUM>.

Two single-row rolling bearings <NUM> are respectively provided on the outer circumferential surfaces of the two axial ends of the third spacers <NUM>-<NUM>.

A first steering plate mounting portion <NUM> is provided on the outer ring <NUM>-<NUM> of the two single-row rolling bearings <NUM>.

A first steering plate <NUM> is mounted on the first steering plate mounting portion <NUM> through convex-concave fit, and one of the step wheels (not shown) of the steps <NUM> of the escalator is rolling fitted on the first steering plate <NUM>.

The stepped flange <NUM>-<NUM> abuts against the inner ring <NUM>-<NUM> of one of the single-row rolling bearings <NUM> and abuts against the third spacer <NUM>-<NUM>.

A first stopper <NUM>-<NUM> is connected to the first steering plate mounting portion <NUM> by fasteners and extends to the rolling body of another single-row rolling bearing <NUM> along the radial direction of the third cylindrical section <NUM>-<NUM>, thereby blocking the outer ring <NUM>-<NUM> of the other single-row rolling bearing <NUM> in the axial direction.

The stepped flange <NUM>-<NUM> is supported by the driving spindle <NUM> at its two ends along the axial direction of the driving spindle <NUM> (for example, one end is supported by the second ferrule <NUM>-<NUM> and the other end is supported by the outer circumferential surface of the third cylindrical section <NUM>-<NUM>), so that the spline structure provided on the outer circumferential surface of the second cylindrical section <NUM>-<NUM> does not bear radial pressure, but only bears driving torque.

According to the above embodiments of the present disclosure, as shown in <FIG>, the first steering plate mounting portion <NUM> is provided with a first mounting portion boss <NUM>-<NUM>.

The third spacer <NUM>-<NUM> is provided with a spacer boss <NUM>-<NUM>-<NUM> facing the first mounting boss <NUM>-<NUM>.

The outer rings <NUM>-<NUM> of the two single-row rolling bearings <NUM> respectively abut against two axial ends of the first mounting boss <NUM>-<NUM>.

The inner rings <NUM>-<NUM> of the two single-row rolling bearings <NUM> abut against two axial ends of the spacer boss <NUM>-<NUM>-<NUM>, respectively.

According to the above embodiments of the present disclosure, as shown in <FIG>, a fourth cylindrical section <NUM>-<NUM> and a fifth cylindrical section <NUM>-<NUM> are sequentially provided on the driving spindle <NUM> adjacent to the third cylindrical section <NUM>-<NUM> of the driving spindle <NUM>.

On the outer circumferential surface of the fourth cylindrical section <NUM>-<NUM>, a ring-shaped fourth spacer <NUM>-<NUM> is provided.

As shown in <FIG>, the first axial end of the fourth spacer <NUM>-<NUM> is fitted on the third cylindrical section <NUM>-<NUM>.

A second axial end of the fourth spacer <NUM>-<NUM> is fitted on the fifth cylindrical section <NUM>-<NUM>.

According to the above embodiments of the present disclosure, as shown in <FIG> and <FIG>, the inner ring <NUM>-<NUM> of the other single-row rolling bearing <NUM> and the third spacer <NUM>-<NUM> abut on the first axial end of the fourth spacer <NUM>-<NUM>.

The output gear <NUM>-<NUM> of the third gear box <NUM> abuts against a step portion <NUM>-<NUM>-<NUM> provided on the second axial end of the fourth spacer <NUM>-<NUM>.

A first closing member <NUM> is also provided on the outer surface of the fourth spacer <NUM>-<NUM>.

The first closing member <NUM> is fixedly connected to a first side <NUM>-<NUM> of the housing <NUM>-<NUM> of the third gear box <NUM> by fasteners.

According to the above embodiments of the present disclosure, as shown in <FIG>, a sixth cylindrical section <NUM>-<NUM> is provided on the driving spindle <NUM> adjacent to the fifth cylindrical section <NUM>-<NUM> of the driving spindle <NUM>.

A spline structure is provided on an outer circumferential surface of the sixth cylindrical section <NUM>-<NUM>.

The output gear <NUM>-<NUM> of the third gear box <NUM> has an output gear through hole <NUM>-<NUM>, and a spline structure is provided on the inner circumferential surface of the output gear through hole <NUM>-<NUM> of the output gear <NUM>-<NUM> of the third gear box <NUM>.

The sixth cylindrical section <NUM>-<NUM> of the driving spindle <NUM> is splined in the output gear through hole <NUM>-<NUM> of the output gear <NUM>-<NUM> of the third gear box <NUM>.

According to the above embodiments of the present disclosure, as shown in <FIG>, a second annular recess <NUM>-<NUM> is provided on the driving spindle <NUM> adjacent to the sixth cylindrical section <NUM>-<NUM> of the driving spindle <NUM>.

A seventh cylindrical section <NUM>-<NUM> and an eighth cylindrical section <NUM>-<NUM> are sequentially arranged on the driving spindle <NUM> adjacent to the second annular recess <NUM>-<NUM> of the driving spindle <NUM>.

The output gear <NUM>-<NUM> of the third gear box <NUM> is fitted on the seventh cylindrical section <NUM>-<NUM> and abuts against a step portion <NUM>-<NUM> formed between the seventh cylindrical section <NUM>-<NUM> and the eighth cylindrical section <NUM>-<NUM>.

A second closing member <NUM> is also provided on the outer surface of the eighth cylindrical section <NUM>-<NUM>.

The second closing member <NUM> is fixedly connected to a second side <NUM>-<NUM> of the housing <NUM>-<NUM> of the third gear box <NUM> by fasteners.

The output gear <NUM>-<NUM> is supported by the driving spindle <NUM> at its two ends in the axial direction of the driving spindle <NUM> (for example, one end is supported by the seventh cylindrical section <NUM>-<NUM> and the other end is supported by the step portion <NUM>-<NUM>-<NUM> of the fourth spacer <NUM>-<NUM>), so that the spline structure provided on the outer circumferential surface of the sixth cylindrical section <NUM>-<NUM> does not bear radial pressure, but only bears driving torque.

According to the above embodiments of the present disclosure, as shown in <FIG>, a spline structure is provided on the outer circumferential surface of the second axial end <NUM>-<NUM> of the driving spindle <NUM>.

The output gear <NUM>-<NUM> of the second gear box <NUM> has an output gear through hole <NUM>-<NUM>, and a spline structure is provided on the inner circumferential surface of the output gear through hole <NUM>-<NUM>.

The second axial end <NUM>-<NUM> of the driving spindle <NUM> is fitted in the output gear through hole <NUM>-<NUM> of the output gear <NUM>-<NUM> of the second gearbox <NUM>, and the spline structure of the second axial end <NUM>-<NUM> of the driving spindle <NUM> is fitted with the spline structure of the output gear through hole <NUM>-<NUM>.

According to the above-mentioned embodiments of the present disclosure, as shown in <FIG>, a second axial protrusion <NUM>-<NUM> extends outwardly from the second axial end <NUM>-<NUM> of the driving spindle <NUM>.

A second axial end caps <NUM>-<NUM> are fixedly fitted on the second axial protrusions <NUM>-<NUM> by fasteners and abut against the output gear <NUM>-<NUM> of the second gear box <NUM>.

According to the above embodiments of the present disclosure, as shown in <FIG>, a third annular recess <NUM>-<NUM> is provided on the driving spindle <NUM> adjacent to the second axial end <NUM>-<NUM> of the driving spindle <NUM>.

A ninth cylindrical section <NUM>-<NUM> is provided on the driving spindle <NUM> adjacent to the third annular recess <NUM>-<NUM> of the driving spindle <NUM>.

On the outer circumferential surface of the ninth cylindrical section <NUM>-<NUM>, a third ferrule <NUM>-<NUM> is provided, which is located between an extended portion of the output gear <NUM>-<NUM> of the second gearbox <NUM> and the outer circumferential surface of the ninth cylindrical section <NUM>-<NUM>.

A second double-row roller bearing <NUM> is arranged on the ninth cylindrical section <NUM>-<NUM>.

A fifth spacer <NUM>-<NUM> is provided between the inner ring <NUM>-<NUM> of the second double-row roller bearing <NUM> and the extended portion of the output gear <NUM>-<NUM> of the second gear box <NUM>.

The extended portion of the output gear <NUM>-<NUM> of the second gear box <NUM> abuts against the inner ring <NUM>-<NUM> of the second double-row roller bearing <NUM> through the fifth spacer <NUM>-<NUM>.

The output gear <NUM>-<NUM> is supported by the driving spindle <NUM> at its two ends along the axial direction of the driving spindle <NUM> (for example, one end is supported by the third ferrule <NUM>-<NUM> and the other end is supported by the second axial end cap <NUM>-<NUM> provided on the driving spindle <NUM>), so that the spline structure of the second axial end <NUM>-<NUM> of the driving spindle <NUM> is not subjected to radial pressure, but only to driving torque.

According to the above embodiments of the present disclosure, as shown in <FIG>, a tenth cylindrical section <NUM>-<NUM> is provided on the driving spindle <NUM> adjacent to the ninth cylindrical section <NUM>-<NUM> of the driving spindle <NUM>.

A second step sprocket assembly <NUM> is fitted on the tenth cylindrical section <NUM>-<NUM>.

The second step sprocket assembly <NUM> includes a step flange <NUM>-<NUM> and a step sprocket <NUM>-<NUM>, wherein the step sprocket <NUM>-<NUM> is connected to the step flange <NUM>-<NUM> through fasteners and cooperates with the steps <NUM> of the escalator.

The step flange <NUM>-<NUM> is matched with the spline structure provided on an outer circumferential surface of the tenth cylindrical section <NUM>-<NUM> through the spline structure provided on an inner circumferential surface of the step flange through hole <NUM>-<NUM>.

According to the above embodiments of the present disclosure, as shown in <FIG> and <FIG>, a fourth ferrule <NUM>-<NUM> is further provided on the outer circumferential surface of the ninth cylindrical section <NUM>-<NUM>, and the fourth ferrule <NUM>-<NUM> is located between the step flange <NUM>-<NUM> and the outer circumferential surface of the ninth cylindrical section <NUM>-<NUM>.

A sixth spacer <NUM>-<NUM> is provided between the inner ring <NUM>-<NUM> of the second double-row roller bearing <NUM> and the step flange <NUM>-<NUM> of the second step sprocket assembly <NUM>.

The inner ring <NUM>-<NUM> of the second double-row roller bearing <NUM> abuts against the step flange <NUM>-<NUM> of the second step sprocket assembly <NUM> and against the fourth ferrule <NUM>-<NUM> through the sixth spacer <NUM>-<NUM>.

According to the above embodiments of the present disclosure, as shown in <FIG>, an eleventh cylindrical section <NUM>-<NUM> are provided on the driving spindle <NUM> adjacent to the tenth cylindrical section <NUM>-<NUM> of the driving spindle <NUM>.

An annular seventh spacer <NUM>-<NUM> is provided on the outer circumferential surface of the eleventh cylindrical section <NUM>-<NUM>.

A single-row rolling bearing <NUM> is provided on the outer circumferential surface of the two axial ends of the seventh spacers <NUM>-<NUM>, respectively.

A second steering plate mounting portion <NUM> is provided on the outer ring <NUM>-<NUM> of the two single-row rolling bearings <NUM>.

A second steering plate <NUM> is mounted on the second steering plate mounting portion <NUM> through convex-concave fit, and another step wheel (not shown) of the escalator step <NUM> is rolled and fitted on the second steering plate <NUM>.

The step flange <NUM>-<NUM> of the second step sprocket assembly <NUM> abuts against the inner ring <NUM>-<NUM> of one of the single row rolling bearings <NUM> and abuts against the seventh spacer <NUM>-<NUM>.

The stepped flange <NUM>-<NUM> is supported by the driving spindle <NUM> at its two ends in the axial direction of the driving spindle <NUM> (for example, one end is supported by the fourth ferrule <NUM>-<NUM> and the other end is supported by the outer circumferential surface of a part of the tenth cylindrical section <NUM>-<NUM>), so that the spline structure provided on the outer circumferential surface of the tenth cylindrical section <NUM>-<NUM> does not bear radial pressure, but only bears driving torque.

As shown in <FIG>, a second stopper <NUM>-<NUM> is connected to the second steering plate mounting portion <NUM> by fasteners and extends to the rolling body of another single-row rolling bearing <NUM> along the radial direction of the eleventh cylindrical section <NUM>-<NUM>, thereby blocking the outer ring <NUM>-<NUM> of the other single-row rolling bearing <NUM> in the axial direction.

The second steering plate mounting portion <NUM> is provided with a second mounting portion boss <NUM>-<NUM>.

The seventh spacer <NUM>-<NUM> is provided with a spacer boss <NUM>-<NUM>-<NUM> facing the second mounting boss <NUM>-<NUM>.

The outer ring <NUM>-<NUM> of the two single-row rolling bearings <NUM> respectively abuts against the two axial ends of the second mounting boss <NUM>-<NUM>.

The inner ring <NUM>-<NUM> of the two single-row rolling bearings <NUM> abuts against the two axial ends of the spacer bosses <NUM>-<NUM>-<NUM>, respectively.

According to the above embodiments of the present disclosure, as shown in <FIG>, the seventh spacer <NUM>-<NUM> abuts against a step portion <NUM>-<NUM> formed between the eleventh cylindrical section <NUM>-<NUM> and the eighth cylindrical section <NUM>-<NUM>.

According to the above-mentioned embodiments of the present disclosure, as shown in <FIG>, the third gear box <NUM> includes an output gear <NUM>-<NUM>, a first input gear <NUM>-<NUM>, a handrail belt spindle gear <NUM>-<NUM> and a second input gear <NUM>-<NUM> arranged in its housing.

The fifth driving motor <NUM> drives the first input gear <NUM>-<NUM> through its gear transmission mechanism such as a planetary gear train (not shown).

The sixth driving motor <NUM> drives the second input gear <NUM>-<NUM> through its gear transmission mechanism such as a planetary gear train (not shown).

The first input gear <NUM>-<NUM> is simultaneously matched with the output gear <NUM>-<NUM> and the handrail belt spindle gear <NUM>-<NUM>.

The second input gear <NUM>-<NUM> is engaged with the handrail belt spindle gear <NUM>-<NUM>.

The driving torque of the fifth driving motor <NUM> is transmitted to the driving spindle <NUM> through the input gear <NUM>-<NUM> and to the handrail belt spindle <NUM> through the handrail belt spindle gear <NUM>-<NUM>.

The driving torque of the sixth driving motor <NUM> is transmitted to the handrail belt spindle <NUM> through the handrail belt spindle gear <NUM>-<NUM>.

According to the above embodiments of the present disclosure, as shown in <FIG>, a spline structure is provided on the outer circumferential surface of a part <NUM>-<NUM> of the handrail spindle <NUM>.

The handrail belt spindle gear <NUM>-<NUM> has a handrail belt gear through hole <NUM>-<NUM>-<NUM>, and a spline structure is arranged on the inner circumferential surface of the handrail belt gear through hole <NUM>-<NUM>-<NUM>.

The handrail main shaft <NUM> is fitted in the handrail belt gear through hole <NUM>-<NUM>-<NUM>, and the spline structure on the inner circumferential surface of the handrail belt gear through hole <NUM>-<NUM>-<NUM> is fitted with the spline structure on the outer circumferential surface of the part of the handrail belt spindle <NUM>.

According to the above embodiments of the present disclosure, as shown in <FIG>, two handrail assemblies <NUM> are provided on both axial ends of the handrail belt spindle <NUM> respectively.

The rotation of the handrail belt spindle <NUM> drives the handrail assemblies <NUM> to move.

According to the above-mentioned embodiments of the present disclosure, as shown in <FIG>, a third closing member <NUM> and a fourth closing member <NUM> are further provided on the handrail belt spindle <NUM>.

The third closing member <NUM> and the fourth closing member <NUM> are fixedly connected to both sides of the housing <NUM>-<NUM> of the third gear box <NUM> through fasteners.

As shown in <FIG>, the housing <NUM>-<NUM> of the third gear box <NUM> is provided with a third gear box opening <NUM>-<NUM>. A handrail belt spindle gear axial extension <NUM>-<NUM>-<NUM> of the handrail belt spindle gear <NUM>-<NUM> is arranged in the third gear box opening <NUM>-<NUM> and extends out of the housing <NUM>-<NUM> of the third gear box <NUM> from the third gear box opening <NUM>-<NUM>.

The handrail belt spindle gear axial extension <NUM>-<NUM>-<NUM> is supported by the handrail belt spindle <NUM> at its two ends along the axial direction of the handrail belt spindle <NUM> (for example, one end is supported by the handrail belt spindle <NUM> and the other end is supported by the handrail belt spindle collar provided on the handrail spindle <NUM>), so that the spline structure on the outer circumferential surface of the part of the handrail belt spindle <NUM> does not bear radial pressure, but only bears driving torque.

A radial spacer <NUM> is provided in the third gear box opening <NUM>-<NUM>. The radial spacer <NUM> is located between the handrail belt spindle gear axial extension <NUM>-<NUM>-<NUM> and an inner circumferential surface of the third gear box opening <NUM>-<NUM> in the radial direction of the third gear box opening <NUM>-<NUM>.

Claim 1:
A driving device for escalators, comprising a first driving motor (<NUM>), a second driving motor (<NUM>), a first gearbox (<NUM>), a driving spindle (<NUM>) and a handrail belt spindle (<NUM>), wherein the first driving motor and the second driving motor are connected with the first gear box (<NUM>), the driving torque of the first driving motor and the second driving motor is transmitted to the driving spindle through the first gear box,
characterized in that the driving device further comprises a third driving motor (<NUM>), a fourth driving motor (<NUM>) and a second gearbox (<NUM>), wherein the third driving motor and the fourth driving motor are connected with the second gear box (<NUM>), and the driving torque of the third driving motor and the fourth driving motor are transmitted to the driving spindle through the second gear box;
at least one fifth driving motor (<NUM>), at least one sixth driving motor (<NUM>) and at least one third gearbox (<NUM>); the fifth driving motor and the sixth driving motor are connected with the third gear box (<NUM>);
the driving torque of the fifth driving motor and the sixth driving motor is transmitted to the driving spindle and the handrail belt spindle through the third gear box.