阅读说明：本技术 螺旋式自动扶梯的梯级驱动装置及螺旋式自动扶梯 (Step driving device of spiral escalator and spiral escalator ) 是由 应书勇 庞骋 符立峰 李春福 于 2019-09-18 设计创作，主要内容包括：本发明公开了一种螺旋式自动扶梯的梯级驱动装置,包括主驱动轴、固定在所述主驱动轴两端的梯级链轮以及用于驱动所述梯级链轮转动的驱动电机,所述梯级链轮包括第一梯级链轮和第二梯级链轮,梯级上设置有梯级轴,所述第一梯级链轮的直径大于所述第二梯级链轮的直径,所述主驱动轴水平设置,所述梯级轴与所述主驱动轴呈夹角设置。本发明的一种螺旋式自动扶梯的梯级驱动装置,其结构设计合理,两梯级链的最初动力来源于同一主驱动轴,使二者能启停步动,保证了乘梯安全；通过调整梯级链轮节圆直径的大小来实现螺旋梯级内圈、外圈不同运行速度,结构简单、容易实现；且将主驱动轴水平设置,技术成熟、使用安全。(The invention discloses a step driving device of a spiral escalator, which comprises a main driving shaft, step chain wheels fixed at two ends of the main driving shaft and a driving motor used for driving the step chain wheels to rotate, wherein the step chain wheels comprise a first step chain wheel and a second step chain wheel, step shafts are arranged on steps, the diameter of the first step chain wheel is larger than that of the second step chain wheel, the main driving shaft is horizontally arranged, and the step shafts and the main driving shaft form an included angle. The step driving device of the spiral escalator has reasonable structural design, the initial power of two step chains is from the same main driving shaft, so that the two step chains can start and stop to step, and the safety of taking the escalator is ensured; the different running speeds of the inner ring and the outer ring of the spiral step are realized by adjusting the pitch circle diameter of the step chain wheel, and the structure is simple and easy to realize; and the main driving shaft is horizontally arranged, so that the technology is mature and the use is safe.)

1. The utility model provides a step drive arrangement of spiral escalator, includes the main drive axle, fixes the step sprocket at main drive axle both ends and be used for the drive step sprocket pivoted driving motor, the step sprocket includes first step sprocket and second step sprocket, is provided with the step axle on the step, its characterized in that, the diameter of first step sprocket is greater than the diameter of second step sprocket, the main drive axle level sets up, the step axle with the main drive axle is the contained angle setting.

2. The step driving device of an escalator according to claim 1, wherein said first step sprocket and said second step sprocket have the same number of teeth and different pitches; or the first step chain wheel and the second step chain wheel have the same tooth pitch and different tooth numbers; or the tooth pitch and the tooth number on the first step chain wheel and the second step chain wheel are different.

3. The step driving device of an escalator according to claim 2, wherein said step shafts have inner and outer ends, and the distance between the inner ends of adjacent step shafts is smaller than the distance between the outer ends of the corresponding adjacent step shafts.

4. The step driving device of an escalator according to claim 3, wherein an inner end portion of said step shaft is lower than an outer end portion of said step shaft.

5. The step driving device of an escalator according to claim 2, wherein a vertical plane on which an axis of said step shaft is located is parallel to a vertical plane on which a front end of said step tread is located.

6. The step driving device of an escalator according to claim 2, wherein a tread surface of said step is horizontally disposed, and said main driving shaft is disposed in parallel with said tread surface of said step.

7. The step driving device of an escalator according to claim 1, wherein adjacent steps are connected by a step chain, the step chain comprises an inner step chain and an outer step chain, the first step sprocket is used for driving the outer step chain to operate, and the second step sprocket is used for driving the inner step chain to operate.

8. The step drive of an escalator as claimed in claim 7, wherein the pitch of said inner step chain is smaller than the pitch of said outer step chain.

9. A step driving device of an escalator according to claim 1, wherein a driving sprocket is connected to said second step sprocket, and a main driving chain is provided between said driving motor and said driving sprocket.

10. An escalator comprising a step drive of an escalator according to any one of claims 1-9.

Technical Field

The invention relates to the technical field of escalators, in particular to a step driving device of a spiral escalator and the spiral escalator comprising the step driving device.

Background

With the development and progress of society, the escalator is widely used and becomes an indispensable device for people to facilitate life. But current escalators are essentially linear escalators.

The working mode and the constituent functional parts of the spiral escalator are similar to those of a linear escalator. The spiral staircase can provide ascending or descending service for passengers, the left side and the right side of the steps are provided with hand straps for passengers to grasp, and the hand straps and the steps run along a spiral track. In order to make the spiral stair turn sideways while moving forward, the stair driving device must provide two different running speeds for the inner ring and the outer ring of the stair.

In the case of the existing common linear escalator, two step chains are used for driving steps (one on each side of the steps), which is also a mandatory regulation of the national escalator industry standard. The common escalator generally drives a main driving chain to transmit power to a main driving shaft through a motor, two step chain wheels with the same pitch and tooth number are arranged on the main driving shaft to drive a step chain to enable steps to move upwards or downwards, and the two sides of the lower step of the structure keep constant-speed movement. Therefore, the structure can not meet the special requirements of the spiral staircase on the step speed at present.

Disclosure of Invention

In view of the above, in order to solve the problems of the prior art, the present invention provides a step driving apparatus suitable for an escalator.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a step drive arrangement of spiral escalator, includes the main drive axle, fixes the step sprocket at main drive axle both ends and be used for the drive step sprocket pivoted driving motor, the step sprocket includes first step sprocket and second step sprocket, is provided with the step axle on the step, the diameter of first step sprocket is greater than the diameter of second step sprocket, the main drive axle level sets up, the step axle with the main drive axle is the contained angle setting. The initial power of the two-step chain is from the same main driving shaft, so that the two chains can be started, stopped and stepped, and the safety of taking the elevator is ensured; the different running speeds of the inner ring and the outer ring of the spiral step are realized by adjusting the pitch circle diameter of the step chain wheel, and the structure is simple and easy to realize; and the main driving shaft is horizontally arranged, the driving mode and the installation type are similar to those of a common escalator, the technology is mature, and the use is safe.

Preferably, the first step chain wheel and the second step chain wheel have the same number of teeth and different tooth pitches; or the first step chain wheel and the second step chain wheel have the same tooth pitch and different tooth numbers; or the tooth pitch and the tooth number on the first step chain wheel and the second step chain wheel are different. The diameters of the first step chain wheel and the second step chain wheel are changed by various methods to achieve ideal speed difference and meet the requirements of the spiral escalator.

More preferably, the step shafts have inner ends and outer ends, and the distance between the inner ends of adjacent step shafts is smaller than the distance between the outer ends of the corresponding adjacent step shafts. The step structure is changed, the distance between the outer ring step shafts is enlarged, so that when the step rotates, the outer ring moves for a longer distance than the inner ring, and the step tread is matched with the fan-ring-shaped step tread, so that two sides of the step have different movement speeds, and the step turns to the side when moving forward by utilizing the speed difference, thereby meeting the spiral movement requirement.

Further preferably, the inner end of the step shaft is lower than the outer end of the step shaft. The outer end part and the inner end part of the step shaft are positioned in the same vertical plane, and the outer end part of the step shaft is higher than the inner end part of the step shaft, so that an inclined angle is formed between the step shaft and the tread, the step can turn to the side while advancing, and the step tread is kept horizontal in the working section.

More preferably, a vertical plane on which an axis of the step shaft is located is parallel to a vertical plane on which a front end of the step tread is located. That is, the step shaft is parallel to the front end of the tread when viewed from the top of the step, so that the main driving shaft can be set to be in a horizontal state when the driving device is designed, the structure is more stable, and the operation is more stable.

More preferably, the tread surface of the step is horizontally disposed, and the main drive shaft is disposed in parallel with the tread surface of the step.

Preferably, adjacent steps are connected through step chains, each step chain comprises an inner ring step chain and an outer ring step chain, the first step chain wheel is used for driving the outer ring step chain to operate, and the second step chain wheel is used for driving the inner ring step chain to operate. Because the diameters of the two step chain wheels are different, the speed of the outer ring step chain is higher than that of the inner step chain, so that the outer ring and the inner ring of the step respectively obtain two different running speeds.

More preferably, the pitch of the inner ring step chain is smaller than the pitch of the outer ring step chain. Since the distance between the inner ends of the adjacent step shafts is smaller than the distance between the outer ends of the adjacent step shafts, the pitch of the inner step chain can be set smaller than the pitch of the outer step chain.

Preferably, a driving sprocket is connected to the second step sprocket, and a main driving chain is arranged between the driving motor and the driving sprocket.

The invention also provides a spiral escalator which comprises the step driving device of the spiral escalator.

Compared with the prior art, the invention has the advantages that: the step driving device of the spiral escalator has reasonable structural design, the initial power of two step chains is from the same main driving shaft, so that the two step chains can start and stop to step, and the safety of taking the escalator is ensured; the different running speeds of the inner ring and the outer ring of the spiral step are realized by adjusting the pitch circle diameter of the step chain wheel, and the structure is simple and easy to realize; and the main driving shaft is horizontally arranged, the driving mode and the installation type are similar to those of the common escalator, the technology is mature, the use is safe, and the escalator is suitable for any spiral escalator which ascends leftwards or rightwards.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic perspective view of a spiral escalator in accordance with a preferred embodiment of the present invention;

FIG. 2 is an enlarged view of section I of FIG. 1;

fig. 3 is a schematic top view of the step drive of the escalator in accordance with the preferred embodiment of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

fig. 5 is a schematic view showing the operation of the escalator path of the spiral escalator in the preferred embodiment of the present invention;

fig. 6 is a front view of a step in the escalator of the preferred embodiment of the present invention;

fig. 7 is a top view of a step in the escalator of the preferred embodiment of the present invention;

fig. 8 is a side view of a step in the escalator of the spiral type in the preferred embodiment of the present invention;

fig. 9 is a perspective view of a first perspective of a step in the escalator of the preferred embodiment of the present invention;

FIG. 10 is a perspective view of the hidden step shaft and roller of the step of FIG. 9;

fig. 11 is a perspective view of a second perspective of a step in the escalator of the preferred embodiment of the invention;

fig. 12 is a perspective view of a step in the escalator of the spiral type according to another preferred embodiment of the present invention;

fig. 13 is a top plan view of a horizontal flight in the escalator of the preferred embodiment of the present invention;

fig. 14 is a side view of a horizontal flight in the escalator of the preferred embodiment of the present invention;

fig. 15 is a perspective view of an inclined section of a ramp in the escalator of the preferred embodiment of the invention;

wherein: 1. the stair climbing device comprises an upper comb plate, 2 parts of a skirt panel, 3 parts of stairs, 4 parts of inner ring stair chains, 5 parts of outer ring stair chains, 6 parts of stair shafts, 7 parts of lower comb plates, 8 parts of treads, 9 parts of skirts, 101 parts of tread edge teeth, 102 parts of tread edge teeth, 111 parts of tread tooth grooves, 112 parts of tread tooth grooves, 12 parts of rollers, 131 parts of inner support shafts, 132 parts of outer support shafts, 141 parts of inner support holes, 142 parts of outer support holes, 151 parts of inner end plates, 152 parts of outer end plates, 161 parts of limiting parts, 162 parts of limiting grooves, 17 parts of main drive shafts, 18 parts of drive motors, 19 parts of main drive chains, 20 parts of drive sprockets, 21 parts of first stair sprockets, 22 parts of second stair sprockets and 23 parts of handrail belts.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not a whole embodiment. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 15, the spiral escalator of the present embodiment includes a step structure, a driving device adapted to the step structure, and other prior art adaptive components such as an upper comb plate 1, a lower comb plate 7, a skirt panel 2, a handrail belt 23, and the like.

The step structure of the spiral escalator in this embodiment includes a plurality of steps 3, step shafts 6 disposed on the steps 3, and step chains for driving the step shafts 6 to move, where the steps 3 include tread surfaces 8, kick surfaces 9, inner end plates 151, and outer end plates 152, the step chains include inner-ring step chains 4 and outer-ring step chains 5, the tread surfaces 8 of the steps 3 are of a fan-ring shape, the radius corresponding to the inner rings of the tread surfaces 8 is smaller than the radius corresponding to the outer rings of the tread surfaces 8, the step shafts 6 have inner end portions and outer end portions, and the distance between the inner end portions of adjacent step shafts 6 is smaller than the distance between the outer end portions of adjacent step shafts 6, as shown in fig. 13 and 15. The step chain in the embodiment adopts the sleeve roller chain which is a limited three-dimensional chain, can be bent in a small range along the lateral direction, and has mature structure realization technology and high reliability.

Tread ridge teeth 101 matched with the upper comb plate 1 and the lower comb plate 7 are arranged on the tread 8, and tread tooth grooves 111 are formed between the adjacent tread ridge teeth 101; the kick surface 9 is provided with kick surface ridge teeth 102, and a kick surface tooth socket 112 is formed between adjacent kick surface ridge teeth 102. The partial tread ridge 101 extends to one side far away from the kick surface 9 to form a limiting part 161, and the limiting part 161 is accommodated in the kick surface tooth groove 112 of the corresponding step 3; adjacent ones of the stopper portions 161 form a stopper groove 162 therebetween, and the kick face ridge teeth 102 are received in the stopper groove 162 of the corresponding step 3. That is, a mutual limiting effect is formed between adjacent steps 3, so that the steps 3 are kept stable in the operation process, and the tread 8 needs to be matched with the upper comb plate 1 and the lower comb plate 7.

The center of the circle corresponding to the inner circle of the tread surface 8 coincides with the center of the circle corresponding to the outer circle of the tread surface 8, but the radii corresponding to the two circles are different, as shown in fig. 7. Namely, the tread ridge 101 or the tread groove 111 on the tread 8 belongs to a segment of the circumference of a plurality of concentric circles, but the closer to the outer end, the longer the circumference. In other embodiments, the centers of the circles may approximately coincide.

The section of the kick surface 9 is circular arc, and the radius R3 corresponding to the circular arc of the inner circle of the kick surface 9 is smaller than the radius R4 corresponding to the circular arc of the outer circle of the kick surface 9, as shown in FIG. 8. I.e. the riser ridge 102 of the step 3 is formed by a set of curved lines of unequal radius.

As shown in fig. 6 and fig. 8-12, the inner end plate 151 and the outer end plate 152 are respectively provided with an inner supporting hole 141 and an outer supporting hole 142 corresponding to the step shaft 6, the axial line of the inner supporting hole 141 and the axial line of the outer supporting hole 142 are located in the same vertical plane, the vertical plane is perpendicular to the tread 8, and the height of the outer supporting hole 142 is higher than that of the inner supporting hole 141. That is, the outer end and the inner end of the step shaft 6 are located in the same vertical plane, and the outer end of the step shaft 6 is higher than the inner end of the step shaft 6, so that an inclined angle is formed between the step shaft 6 and the tread surface 8, the step 3 can turn to the side while moving forward, and the step tread surface 8 is kept horizontal in the working section.

As shown in fig. 3, 7-8 and 13, the vertical plane on which the axis of the step axle 6 lies is parallel to the vertical plane on which the front end of the tread 8 lies. That is, the step shaft 6 is parallel to the front end of the tread 8 in plan view of the step 3, so that the main drive shaft 17 can be set in a horizontal state when designing the drive device, and the structure is more stable and the operation is more stable.

As shown in fig. 7, 9 and 11-12, the pitch of the inner step chain 4 is smaller than the pitch of the outer step chain 5. The pitch is the distance between two adjacent chain links on the step chain, and since the distance between the inner ends of the adjacent step shafts 6 is smaller than the distance between the outer ends of the adjacent step shafts 6, the pitch of the inner step chain 4 can be set smaller than the pitch of the outer step chain 5.

As shown in fig. 8, the inner end plate 151 and the outer end plate 152 are respectively provided with an inner support shaft 131 and an outer support shaft 132 for mounting the step roller 12, the distance between the outer support hole 142 and the outer support shaft 132 is greater than the distance between the inner support hole 141 and the inner support shaft 131, and the axis of the outer support shaft 132 is slightly higher than the axis of the inner support shaft 131 or is flush with the axis of the inner support shaft 131.

The step driving device in this embodiment includes a main driving shaft 17, step sprockets fixed at two ends of the main driving shaft 17, and a driving motor 18 for driving the step sprockets to rotate, wherein the step sprockets include a first step sprocket 21 and a second step sprocket 22, the second step sprocket 22 is connected to a driving sprocket 20, and a main driving chain 19 is disposed between the driving motor 18 and the driving sprocket 20. The diameter of the first step chain wheel 21 is larger than that of the second step chain wheel 22, the main driving shaft 17 is horizontally arranged, and the step shaft 6 and the main driving shaft 17 are arranged at an included angle. The first step chain wheel 21 is used for driving the outer ring step chain 5 to operate, and the second step chain wheel 22 is used for driving the inner ring step chain 4 to operate. Because the diameters of the two step chain wheels are different, the speed of the outer ring step chain 5 is higher than that of the inner ring step chain 4, so that the outer ring and the inner ring of the step respectively obtain two different running speeds, namely slow inner ring and fast outer ring.

Specifically, the first step sprocket 21 and the second step sprocket 22 have the same number of teeth and different pitches; or the first step sprocket 21 and the second step sprocket 22 have the same pitch and different teeth; or, the tooth pitch and the tooth number on the first step chain wheel 21 and the second step chain wheel 22 are different, and the diameters of the first step chain wheel 21 and the second step chain wheel 22 are changed by various methods to achieve a more ideal speed difference and meet the requirements of the spiral escalator. In this embodiment, it is preferable that the first step sprocket 21 and the second step sprocket 22 have the same pitch and different teeth to cooperate with the step chain.

The step shaft 6 in this embodiment is a through shaft, as shown in fig. 11; in other embodiments, the step shaft 6 may be formed of two half shafts, as shown in fig. 12.

The working principle and the working process of the spiral escalator of the embodiment are briefly described as follows:

the tread 8 of the spiral step 3 is of a fan-ring type, and the inner side and the outer side of the tread 8 are two concentric (or approximately concentric) circular arcs, namely R1 and R2 in the attached figures 7 and 13. The step tread 8 is provided with a plurality of tread ridge teeth 101 and tread tooth grooves 111 which are arranged concentrically (or approximately concentrically), and the tread ridge teeth and the tread tooth grooves are matched with the upper comb plate 1 and the lower comb plate 7 of the inlet and the outlet to meet the requirement of meshing depth of the comb teeth position specified by the standard. The step kick surface 9 is formed by a group of arc curves with different radiuses, as shown in fig. 6 and 8, the kick surface 9 is provided with kick surface ridge teeth 102 and kick surface tooth grooves 112.

The steps 3 are driven by a step chain respectively at the inner side and the outer side, the step distance of the inner ring step chain 4 is slightly smaller than that of the outer ring step chain 5, a step shaft 6 is connected between the two chains, the steps 3 are arranged on the step shaft 6 and can rotate around the shaft, and an angle is formed between the step shaft 6 and the step tread 8 and is arranged in a non-parallel way, as shown in figures 8 and 14. The step pitch can be understood in this embodiment as the distance between two adjacent step shafts 6.

By adding the special step driving structure in the embodiment, the inner ring step chain 4 and the outer ring step chain 5 generate different movement speeds, the spiral steps 3 can turn to the side while advancing by utilizing the speed difference of the two sides, and the tread 8 of the steps 3 is kept horizontal in the working section all the time, thereby achieving the requirement of spiral movement.

In the invention, any number of horizontal steps 3 can be arranged as required; the size of the whole ladder helical radius can be changed by adjusting the value of R1 in the step tread surface 8; the step depth H can be changed by adjusting the values of the lengths L1 and L2 of the inner ring step chain 4 and the outer ring step chain 5 between the adjacent step shafts 6, as shown in fig. 13; the step 3 width can be changed by adjusting the difference between R1 and R2; the inclination angle of the whole staircase can be changed by adjusting the height difference between the treads 8 of the adjacent steps 3; the lifting height of the whole escalator can be changed by adjusting the number of the steps of the inclined section.

The tread 8 of the step 3 is parallel to the horizontal plane, and the step shaft 6 is not parallel to the tread 8 of the step 3; the inner step chain 4 corresponds to the second step sprocket 22 having a small pitch circle diameter, and the outer step chain 5 corresponds to the first step sprocket 21 having a large pitch circle diameter.

When the escalator operates, the driving motor 18 drives the main driving chain 19 and the driving chain wheel 20 to transmit power to the main driving shaft 17, and the first step chain wheel 21 and the second step chain wheel 22 rotate at an equal angular velocity along with the main driving shaft 17. The first step sprocket 21 and the second step sprocket 22 respectively pull the inner step chain 4 and the outer step chain 5 to move together, so that the step chains operate at the same speed as the gear tooth portions of the respective sprockets. Since the pitch circle diameter of the first step sprocket 21 is larger than that of the second step sprocket 22, the outer step chain 5 has a higher speed than the inner step chain 4, so that the outer and inner steps 3 respectively obtain two different operating speeds.

The pitch circle diameters D2 and D1 of the first step chain wheel 21 and the second step chain wheel 22 are changed by adopting a plurality of methods such as the chain links with the same tooth number but different pitches, the chain links with the same pitches but different tooth numbers or the chain links with different pitches and tooth numbers, so as to achieve ideal speed difference; the steps 3 rotate around the step shaft 6 by restricting the position of the roller 12 of the steps 3, so that the steps 3 complete the rotation at the first step chain wheel 21 and the second step chain wheel 22 along with the inner ring step chain 4 and the outer ring step chain 5, and the cyclic use of the step path can be realized.

The step structure of the embodiment is similar to a common escalator, adopts a two-step chain drive and similar four-wheel trolley type step structure, and can circularly realize that passengers can be conveyed upwards or downwards in a tilting way and can stably and synchronously complete lateral turning at the same time by changing the shapes of the step tread surface 8 and the kick surface 9 and assisting with other structures such as a special step chain, a drive chain wheel 20, a step guide rail and the like, thereby meeting the spiral transportation requirement. And the tread of the spiral step can be kept horizontal in the working section, and the meshing clearance between adjacent steps meets the standard requirement, thereby ensuring the safety of taking the ladder. In the step structure of the embodiment, the spiral step skirting surface adopts a composite curved surface design, so that the teeth and tooth grooves of adjacent steps can always keep a stable meshing gap when in spiral motion; the steps are driven by double chains but have different step distances, the two sides of the spiral steps have different movement speeds by matching with the driving mechanism in the embodiment, and the steps 3 turn to the side when advancing by utilizing the speed difference so as to meet the requirement of spiral movement; the chains are connected by a step shaft 6, the steps 3 are arranged on the step shaft 6, the step shaft 6 can be a through shaft or two half shafts, and an inclined angle is formed between the step shaft 6 and the step tread.

The step driving device in the embodiment drives the corresponding step chain to enable the inner ring and the outer ring of the spiral step to respectively operate at different speeds, so that passengers can be conveyed upwards or downwards in a tilting mode, meanwhile, the lateral turning can be stably and synchronously completed by means of the speed difference, and the spiral transportation requirement is met. In the step driving device, a driving motor 18 (single drive or double drive) drives a large step chain wheel, a small step chain wheel and a large step chain wheel to rotate through a main driving chain 19 and a main driving shaft 17, so that the two step chain wheels which coaxially rotate generate two linear speeds of a fast speed and a slow speed to respectively drag the step chains at two sides and provide two running speeds for the inner ring and the outer ring of the spiral step. The pitch circle diameter ratio of the two-step chain wheel can be adjusted by various methods such as the same chain link tooth number but different pitches, the same chain link pitch but different tooth numbers or different chain link pitch and tooth numbers, so that the inner ring speed and the outer ring speed of the spiral step have various matching combinations, and the spiral step chain wheel can be suitable for escalators with various spiral radiuses and spiral lift angles.

The spiral escalator has reasonable structural design, and the step structure is changed to enlarge the distance between the outer ring step shafts, so that when the steps rotate, the outer ring moves for a longer distance than the inner ring, and the step tread is matched with the sector ring type step tread, so that two sides of the steps have different moving speeds, and the steps turn to the side when advancing by using the speed difference, thereby meeting the spiral moving requirement; the typical characteristics of common escalators such as an inclination angle, the number of horizontal steps, the curvature of guide rails at the upper end and the lower end and the like are kept on the structural parameters of the escalator path of the spiral escalator, and no limitation is theoretically imposed on the lifting height, the number of horizontal steps, the step width, the inclination angle, the left-right rotation direction and the like of the spiral escalator; the installation and driving mode of the stair structure is similar to that of a common escalator, the technology is mature, and the use is safe; the initial power of the two-step chain in the step driving device is from the same main driving shaft, so that the two chains can start, stop and step, and the safety of taking the ladder is ensured; the different running speeds of the inner ring and the outer ring of the spiral step are realized by adjusting the pitch circle diameter of the step chain wheel, and the structure is simple and easy to realize; and the main driving shaft is horizontally arranged, the driving mode and the installation type are similar to those of a common escalator, the technology is mature, the use is safe, and the escalator is suitable for any spiral escalator rising leftwards or rightwards.

The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the invention, and not to limit the scope of the invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.