Extensible handrail linear driving device and moving sidewalk

Abstract

The invention discloses an extensible handrail linear driving device and a moving sidewalk, and aims to solve the problem that a handrail belt is easy to slip due to insufficient driving force of the handrail belt when the moving sidewalk transports goods for a long distance in the prior art. The technical problem is solved through the following technical scheme that a plurality of handrail driving units are arranged, each handrail driving unit comprises a support and a plurality of mounting shafts arranged on the support, the adjacent mounting shafts are in transmission through chains, and each mounting shaft is provided with a friction wheel; the pressing assembly comprises a plurality of pressing wheels matched with the friction wheels on the mounting shaft and a pressing piece for pushing the pressing wheels to move towards the friction wheels; and the mounting shafts of the adjacent handrail driving units are in transmission through chains. The number of the handrail driving units can be automatically selected according to the length of the moving sidewalk, and therefore it can be guaranteed that the multiple friction wheels drive the handrail belt at the same time, the driving force of the handrail belt is increased, and the handrail belt is prevented from slipping.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and more particularly to an expandable handrail linear drive device and a moving walkway. Background Art

[0002] Moving walkways are usually installed in large places such as airports, exhibition halls, and shopping malls to transport passengers and goods horizontally. The structure is similar to that of an escalator, mainly consisting of a moving surface and handrails. Usually, the moving surface does not form a step shape when it is inclined.

[0003] In the process of transporting goods over long distances via moving walkways, the handrail belt drive system is usually installed at one end of the moving walkway due to the long distance, which makes the handrail belt prone to slipping, resulting in insufficient driving force for the handrail belt.

[0004] The Chinese patent publication number is CN110092279A, and the publication date is May 31, 2019. The name of the invention is a handrail transmission structure and a moving walkway containing the same. In this application, a driving wheel is set at the end of the handrail to drive the handrail. The above application drives the handrail by setting a driving wheel at the end of the handrail. The driving force on the handrail is not strong, and the handrail is prone to slipping. Summary of the invention

[0005] The present invention overcomes the problem in the prior art that the handrail is prone to slipping due to insufficient driving force of the handrail when transporting goods over long distances. An expandable handrail linear drive device is provided, which can expand the number of drive units and the spacing between them according to the length of the moving walkway, effectively solving the problem of slipping of the handrail caused by insufficient driving force of the long-distance moving walkway.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solution: an expandable handrail linear drive device, comprising: A plurality of handrail drive units, each of which comprises a support and a plurality of mounting shafts arranged on the support, adjacent mounting shafts are driven by chains, and each mounting shaft is provided with a friction wheel; A clamping assembly, comprising a plurality of clamping wheels matched with the friction wheels on the mounting shaft and a clamping member for pushing the clamping wheels to move toward the friction wheels; The mounting shafts of adjacent handrail drive units are driven by chains.

[0007] In the present invention, the handrail drive unit is a unit assembly composed of a support, a mounting shaft, a chain, a friction wheel and a clamping assembly. When in use, the number of handrail drive units can be selected according to the length of the moving walkway, so that multiple friction wheels can be used to drive the handrail belt at the same time, thereby increasing the driving force of the handrail belt and preventing the handrail belt from slipping. In addition, since multiple friction wheels and clamping members are used to drive the handrail belt at the same time in the present application, and each group of friction wheels and clamping members act independently on the handrail belt, even if the friction force of one or several groups of friction wheels and clamping members on the handrail belt is reduced or even disappears, the remaining friction wheels and clamping members can still drive the handrail belt, thereby effectively avoiding the occurrence of handrail belt slipping.

[0008] During the actual installation, the length of the chain between each group of handrail drive units can also be set to different lengths, so that several groups of handrail drive units can be evenly distributed on the entire handrail belt, and the driving force on the handrail belt is more stable. Of course, the length of the chain between each group of handrail drive units can be set shorter, so that several groups of handrail drive units can be concentrated, which is convenient for centralized handrail drive unit maintenance.

[0009] Preferably, at least two driving sprockets are arranged on each installation shaft, and adjacent installation shafts are connected by chains wound around the driving sprockets for transmission.

[0010] Adjacent installation shafts are driven by chains wound around the driving sprocket, so that when several installation shafts are arranged side by side, power can be transmitted between the several installation shafts, so that the several installation shafts can rotate synchronously.

[0011] Preferably, two mounting shafts are provided on the support.

[0012] The armrest drive unit consists of two mounting shafts, which makes it easy to expand the number of armrest drive units.

[0013] Preferably, the pressing member is an arc-shaped pressing leaf spring, and pressing wheels are provided at both ends of the pressing leaf spring.

[0014] The arc-shaped compression leaf spring utilizes the elastic force generated by the bending of the compression leaf spring itself, so that the compression leaf spring can push the compression wheel onto the friction wheel.

[0015] Preferably, a chain tensioning device is provided on the support, and the chain tensioning device is provided on adjacent installation shafts to tension the transmission chain between the two installation shafts.

[0016] The chain tensioning device is arranged on adjacent installation shafts to tension the transmission chain between the two installation shafts to prevent the chain transmitting power between the installation shafts from loosening.

[0017] Preferably, the chain tensioning device comprises a tensioning member abutting against the chain and a pushing member pushing the tensioning member to press against the chain.

[0018] The pushing member pushes the tensioning member to press tightly on the chain, thereby achieving tensioning of the chain.

[0019] Preferably, the surface of the tensioning member that contacts the chain is an arc surface, and the pushing member is a pushing spring that pushes the tensioning member to contact the chain.

[0020] The push spring can provide continuous pressing force to the tensioning member through its own elastic force, thereby ensuring that the chain is in a tensioned state.

[0021] Preferably, a slide groove is provided on the support, and the direction of the slide groove is the same as the direction of the line connecting the plurality of installation shafts; a sliding block is provided in the slide groove, and the installation shaft is fixedly provided on the sliding block.

[0022] When installing the chain on the adjacent handrail drive unit, the position of the mounting shaft can be moved to facilitate the installation of the chain.

[0023] The present application also provides a moving walkway, comprising the above-mentioned expandable handrail linear drive device, and also comprising a truss and a handrail belt, wherein a plurality of handrail drive units are distributed along the length direction of the truss; a chain drive shaft is arranged on the truss, and the chain drive shaft and the mounting shaft at the end of the expandable handrail linear drive device are driven by a chain; The friction wheel and the clamping piece are pressed on both sides of the handrail.

[0024] The driving host drives the mounting shafts on several handrail driving units to rotate through the output main shaft, chain driving shaft and chain; the entire transmission structure is simple and compact with high transmission efficiency.

[0025] Preferably, a limit adjustment assembly is also provided on the truss, which includes limit bolts arranged at both ends of the support in the horizontal direction, side blocks are arranged on both sides of the support in the horizontal direction, side holes are provided on the mounting side blocks, and the limit bolts pass through the side holes.

[0026] When installing the support, the position of the support can be adjusted by turning the limit nut, so that the chain can be installed conveniently, and after installation, the chain can be tightened by adjusting the position of the support.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: the handrail drive unit is a unit assembly consisting of a support, a mounting shaft, a chain, a friction wheel, a clamping assembly and a chain tensioning device. When in use, the number of handrail drive units can be selected according to the length of the moving walkway. The adjacent handrail drive units are also driven by chains, so that the power on the mounting shaft is transmitted in sequence through the chains, and all the mounting shafts rotate synchronously. In addition, the mounting shafts are driven by chains, and the chains will not slip, which can ensure that the mounting shafts rotate, drive multiple friction wheels to drive the handrail belts at the same time, increase the driving force of the handrail belts, and prevent the handrail belts from slipping. Furthermore, since the present application uses multiple friction wheels and pressure members to drive the handrail belt at the same time, and each group of friction wheels and pressure members act on the handrail belt independently, even if the friction force of one or several groups of friction wheels and pressure members on the handrail belt is reduced or even disappears, the remaining friction wheels and pressure members can still act on the handrail belt, and the handrail belt can run smoothly, effectively avoiding the slipping of the handrail belt due to the loss of friction of some friction wheels.

[0028] During the actual installation, the length of the chain between each group of handrail drive units can also be set to different lengths, so that several groups of handrail drive units can be evenly distributed on the entire handrail belt, and the driving force on the handrail belt is more stable. Of course, the length of the chain between each group of handrail drive units can be set shorter, so that several groups of handrail drive units can be concentrated, which is convenient for centralized handrail drive unit maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional structural diagram of a plurality of handrail drive units of the present invention when they are installed on a side frame.

[0030] Figure 2 It is a front view of a plurality of handrail drive units of the present invention when they are installed on a truss.

[0031] Figure 3 It is a three-dimensional structural diagram of the handrail driving unit of the present invention.

[0032] Figure 4 It is an exploded schematic diagram of the handrail drive unit of the present invention.

[0033] Figure 5 Schematic diagram of an exploded view of a handrail driving unit in another embodiment of the present invention.

[0034] Figure 6 It is a schematic diagram of the installation of several handrail drive units in another embodiment of the present invention.

[0035] Figure 7 It is a three-dimensional structural diagram of a plurality of handrail driving units of the present invention installed on a truss.

[0036] In the figure: 1, handrail drive unit, 11, support, 12, mounting shaft, 121, drive sprocket, 122, oil baffle, 13, friction wheel, 14, slide groove, 141, slider, 15, side block, 151, side hole; 2. a clamping assembly, 21. a clamping wheel, 22. a clamping member, 221. a leaf spring; 3. Chain tensioning device, 31. Tensioning member, 311. Arc surface, 32. Pushing member; 4, truss, 41, side frame; 5. Handrails; 6. Driving main machine, 61. Output spindle, 62. Chain driving shaft; 7. Limit adjustment assembly, 71. Limit bolt, 72. Limit nut. DETAILED DESCRIPTION

[0037] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings: Example 1: Reference Figures 1 to 5 As shown, an expandable handrail linear drive device comprises: A plurality of handrail drive units 1, each of which comprises a support 11 and a plurality of mounting shafts 12 disposed on the support 11, adjacent mounting shafts 12 are driven by a chain, and a friction wheel 13 is disposed on each mounting shaft 12; The clamping assembly 2 includes a plurality of clamping wheels 21 that cooperate with the friction wheels 13 on the mounting shaft 12 and a clamping member 22 that pushes the clamping wheels 21 to move toward the friction wheels 13; The mounting shafts 12 of adjacent handrail driving units 1 are driven by chains.

[0038] In the present application, the handrail driving unit 1 is a unit assembly consisting of a support 11, a mounting shaft 12, a chain, a friction wheel 13 and a clamping assembly 2. When in use, the number of handrail driving units 1 can be selected according to the length of the moving walkway, so that multiple friction wheels 13 can be used to drive the handrail 5 at the same time, thereby increasing the driving force of the handrail 5 and preventing the handrail 5 from slipping. In addition, since multiple friction wheels 13 and clamping members 22 are used to drive the handrail 5 at the same time in the present application, and each group of friction wheels 13 and clamping members 22 act independently on the handrail 5, even if the friction force of one or more groups of friction wheels 13 and clamping members 22 on the handrail 5 is reduced or even disappears, the remaining friction wheels 13 and clamping members 22 can still drive the handrail 5, thereby effectively preventing the handrail 5 from slipping.

[0039] Furthermore, during the actual installation, the length of the chain between each group of handrail drive units 1 can also be set to different lengths, so that several groups of handrail drive units 1 can be evenly distributed on the entire handrail belt 5, and the driving force on the handrail belt 5 is more stable. Of course, the length of the chain between each group of handrail drive units 1 can be set shorter, so that several groups of handrail drive units 1 can be concentratedly distributed, which is convenient for centralized handrail drive units 1 to be repaired.

[0040] Example 2: Reference Figures 1 to 5 As shown, an expandable handrail linear drive device comprises: A plurality of handrail drive units 1, each of which comprises a support 11 and a plurality of mounting shafts 12 disposed on the support 11, adjacent mounting shafts 12 are driven by a chain, and a friction wheel 13 is disposed on each mounting shaft 12; The clamping assembly 2 includes a plurality of clamping wheels 21 that cooperate with the friction wheels 13 on the mounting shaft 12 and a clamping member 22 that pushes the clamping wheels 21 to move toward the friction wheels 13; The mounting shafts 12 of adjacent handrail drive units 1 are driven by chains.

[0041] In order to ensure smooth transmission between adjacent installation shafts 12, at least two drive sprockets 121 are provided on each installation shaft 12, and the adjacent installation shafts 12 are transmitted by chains wound around the drive sprockets 121, so that when several installation shafts 12 are arranged side by side, power can be transmitted between the several installation shafts 12, so that the several installation shafts 12 can rotate synchronously. The friction wheel 13 is provided at the end of the installation shaft 12, and an oil baffle 122 is provided between the drive sprocket 121 and the friction wheel 13.

[0042] The number of the mounting shafts 12 on the support 11 can be set according to actual conditions, for example, three, four or other numbers of mounting shafts 12 can be set on the support 11. In this embodiment, two mounting shafts 12 are set on each support 11 of this embodiment, and the two mounting shafts 12 are arranged in parallel, and the two mounting shafts 12 are transmitted by a chain wound around the driving sprocket 121.

[0043] In one embodiment, the pressing member 22 is an arc-shaped pressing leaf spring, and pressing wheels 21 are provided at both ends of the pressing leaf spring. The arc-shaped pressing leaf spring uses the elastic force generated by the bending of the pressing leaf spring itself to enable the pressing leaf spring to push the pressing wheel 21 onto the friction wheel 13. When in use, the friction wheel 13 and the pressing wheel 21 are clamped on both sides of the handrail 5 to prevent the handrail 5 from slipping. In addition, the pressing leaf spring and the pressing wheel 21 in this embodiment are fixedly arranged on the support 11.

[0044] In one embodiment, two compression leaf springs are provided, and the two ends of the compression wheel 21 are respectively connected to the two compression leaf springs, and each compression leaf spring includes a plurality of overlapping leaf spring pieces 221, and the plurality of leaf spring pieces 221 gradually increase toward the arc-shaped opening direction thereof. The compression leaf spring in this embodiment is composed of three overlapping leaf spring pieces 221, and the lengths of the three leaf spring pieces 221 gradually increase from the bottom. The three leaf spring pieces 221 are arranged in an overlapping manner, and the compression leaf spring can be deformed more easily, thereby facilitating the installation of the handrail belt 5 between the compression wheel 21 and the friction wheel 13.

[0045] The support 11 is provided with a chain tensioning device 3, which is provided on adjacent mounting shafts 12 to tension the transmission chain between the two mounting shafts 12 to prevent the chain transmitting power between the mounting shafts 12 from loosening. In this embodiment, two mounting shafts 12 are provided on the support 11, so only one set of chain tensioning devices 3 is required to be provided between the two mounting shafts 12 to achieve tensioning of the chain connecting the two mounting shafts 12. Correspondingly, if three mounting shafts 12 are provided, two sets of chain tensioning devices 3 are provided between the three mounting shafts 12.

[0046] In one embodiment, the chain tensioning device 3 includes a tensioning member 31 abutting against the chain and a pushing member 32 pushing the tensioning member 31 to press against the chain. The pushing member 32 pushes the tensioning member 31 to press against the chain to achieve tensioning of the chain. The pushing member 32 can be a device such as a cylinder or an oil cylinder. The pushing member 32 and the tensioning member 31 are both arranged on the support 11.

[0047] The surface of the tensioning member 31 that contacts the chain is an arc surface 311 , and the pushing member 32 is a pushing spring that pushes the tensioning member 31 to contact the chain.

[0048] The push spring pushes the tensioning member 31 to press against the chain, thereby tensioning the chain between adjacent mounting shafts 12. The push spring can provide continuous compression force to the tensioning member 31 through its own elastic force, thereby ensuring that the chain is in a tensioned state. In this embodiment, two push springs are provided, and the two push springs provide a stable compression force for the push member 32.

[0049] In the present application, the handrail drive unit 1 is a unit assembly consisting of a support 11, a mounting shaft 12, a chain, a friction wheel 13, a clamping assembly 2 and a chain tensioning device 3. When in use, the number of handrail drive units 1 can be selected according to the length of the moving walkway. The adjacent handrail drive units 1 are also driven by chains, so that the power on the mounting shaft 12 is transmitted in sequence through the chain, and all the mounting shafts 12 rotate synchronously. In addition, the mounting shafts 12 are driven by chains, and the chains will not slip, which can ensure that the mounting shaft 12 rotates, driving multiple friction wheels 13 to simultaneously drive the handrail belt 5, increasing the driving force of the handrail belt 5 and preventing the handrail belt 5 from slipping. Furthermore, since the present application adopts multiple friction wheels 13 and pressure pieces 22 to drive the handrail belt 5 at the same time, and each group of friction wheels 13 and pressure pieces 22 act on the handrail belt 5 independently, even if the friction force of one or several groups of friction wheels 13 and pressure pieces 22 on the handrail belt 5 is reduced or even disappears, the remaining friction wheels 13 and pressure pieces 22 can still act on the handrail belt 5, and the handrail belt 5 can run smoothly, effectively avoiding the slipping of the handrail belt 5 due to the loss of friction of some friction wheels 13.

[0050] Furthermore, during the actual installation, the length of the chain between each group of handrail drive units 1 can also be set to different lengths, so that several groups of handrail drive units 1 can be evenly distributed on the entire handrail belt 5, and the driving force on the handrail belt 5 is more stable. Of course, the length of the chain between each group of handrail drive units 1 can be set shorter, so that several groups of handrail drive units 1 can be concentratedly distributed, which is convenient for centralized handrail drive units 1 to be repaired.

[0051] Example 3: Reference Figures 1 to 6 As shown, an expandable handrail linear drive device comprises: A plurality of handrail drive units 1, each of which comprises a support 11 and a plurality of mounting shafts 12 disposed on the support 11, adjacent mounting shafts 12 are driven by a chain, and a friction wheel 13 is disposed on each mounting shaft 12; The clamping assembly 2 includes a plurality of clamping wheels 21 that cooperate with the friction wheels 13 on the mounting shaft 12 and a clamping member 22 that pushes the clamping wheels 21 to move toward the friction wheels 13; The mounting shafts 12 of adjacent handrail driving units 1 are driven by chains.

[0052] In order to ensure smooth transmission between adjacent installation shafts 12, at least two drive sprockets 121 are provided on each installation shaft 12, and the adjacent installation shafts 12 are transmitted by chains wound around the drive sprockets 121, so that when several installation shafts 12 are arranged side by side, power can be transmitted between the several installation shafts 12, so that the several installation shafts 12 can rotate synchronously. The friction wheel 13 is provided at the end of the installation shaft 12, and an oil baffle 122 is provided between the drive sprocket 121 and the friction wheel 13.

[0053] The number of the mounting shafts 12 on the support 11 can be set according to actual conditions, for example, three, four or other numbers of mounting shafts 12 can be set on the support 11. In this embodiment, two mounting shafts 12 are set on each support 11 of this embodiment, and the two mounting shafts 12 are arranged in parallel, and the two mounting shafts 12 are transmitted by a chain wound around the driving sprocket 121.

[0054] In one embodiment, the pressing member 22 is an arc-shaped pressing leaf spring, and pressing wheels 21 are provided at both ends of the pressing leaf spring. The arc-shaped pressing leaf spring uses the elastic force generated by the bending of the pressing leaf spring itself to enable the pressing leaf spring to push the pressing wheel 21 onto the friction wheel 13. When in use, the friction wheel 13 and the pressing wheel 21 are clamped on both sides of the handrail 5 to prevent the handrail 5 from slipping. In addition, the pressing leaf spring and the pressing wheel 21 in this embodiment are fixedly arranged on the support 11.

[0055] In one embodiment, two compression leaf springs are provided, and the two ends of the compression wheel 21 are respectively connected to the two compression leaf springs, and each compression leaf spring includes a plurality of overlapping leaf spring pieces 221, and the plurality of leaf spring pieces 221 gradually increase toward the arc-shaped opening direction thereof. The compression leaf spring in this embodiment is composed of three overlapping leaf spring pieces 221, and the lengths of the three leaf spring pieces 221 gradually increase from the bottom. The three leaf spring pieces 221 are arranged in an overlapping manner, and the compression leaf spring can be deformed more easily, thereby facilitating the installation of the handrail belt 5 between the compression wheel 21 and the friction wheel 13.

[0056] The support 11 is provided with a chain tensioning device 3, which is provided on adjacent mounting shafts 12 to tension the transmission chain between the two mounting shafts 12 to prevent the chain transmitting power between the mounting shafts 12 from loosening. In this embodiment, two mounting shafts 12 are provided on the support 11, so only one set of chain tensioning devices 3 is required to be provided between the two mounting shafts 12 to achieve tensioning of the chain connecting the two mounting shafts 12. Correspondingly, if three mounting shafts 12 are provided, two sets of chain tensioning devices 3 are provided between the three mounting shafts 12.

[0057] In one embodiment, the chain tensioning device 3 includes a tensioning member 31 abutting against the chain and a pushing member 32 pushing the tensioning member 31 to press against the chain. The pushing member 32 pushes the tensioning member 31 to press against the chain to achieve tensioning of the chain. The pushing member 32 can be a device such as a cylinder or an oil cylinder. The pushing member 32 and the tensioning member 31 are both arranged on the support 11.

[0058] The surface of the tensioning member 31 that contacts the chain is an arc surface 311 , and the pushing member 32 is a pushing spring that pushes the tensioning member 31 to contact the chain.

[0059] The push spring pushes the tensioning member 31 to press against the chain, thereby tensioning the chain between adjacent mounting shafts 12. The push spring can provide continuous compression force to the tensioning member 31 through its own elastic force, thereby ensuring that the chain is in a tensioned state. In this embodiment, two push springs are provided, and the two push springs provide a stable compression force for the push member 32.

[0060] Reference Figure 5 and Figure 6 As shown, the structure of this embodiment is similar to that of the embodiment 2, except that a slide groove 14 is provided on the support 11, and the direction of the slide groove 14 is the same as the direction of the line connecting the plurality of mounting shafts 12; a slider 141 is provided in the slide groove 14, and the slider 141 is a T-shaped structure, and a threaded hole is provided on the slider 141, so as to facilitate connection with the mounting shaft 12. The T-shaped slider 141 can directly cooperate with the slide groove 14, and can be fixed with the mounting shaft 12, and the mounting shaft 12 is provided on the slider 141.

[0061] In this embodiment, the number of slide grooves 14 is related to the number of mounting shafts 12 on the support 11. Two mounting shafts 12 are arranged on the support 11 in this embodiment, so only one of the mounting shafts 12 is installed on the slider 141, so that the mounting shaft 12 can slide along the slide groove 14. When installing a chain on an adjacent handrail drive unit 1, the position of the mounting shaft 12 can be moved to facilitate the installation of the chain. It should be noted that in the specific installation process, the latter handrail drive unit 1 tightens the mounting shaft 12 of the previous handrail drive unit 1 through the chain, and when the last handrail drive unit 1 is installed, the last handrail drive unit 1 is mirrored with the previous handrail drive unit 1, that is, the two supports 11 are symmetrically arranged (such as Figure 6 As shown, the dotted line is the center of symmetry), the mounting shafts 12 arranged on the support 11 and the slider 141 are tightened against each other.

[0062] In the present application, the handrail drive unit 1 is a unit assembly consisting of a support 11, a mounting shaft 12, a chain, a friction wheel 13, a clamping assembly 2 and a chain tensioning device 3. When in use, the number of handrail drive units 1 can be selected according to the length of the moving walkway. The adjacent handrail drive units 1 are also driven by chains, so that the power on the mounting shaft 12 is transmitted in sequence through the chain, and all the mounting shafts 12 rotate synchronously. In addition, the mounting shafts 12 are driven by chains, and the chains will not slip, which can ensure that the mounting shaft 12 rotates, driving multiple friction wheels 13 to simultaneously drive the handrail belt 5, increasing the driving force of the handrail belt 5 and preventing the handrail belt 5 from slipping. Furthermore, since the present application adopts multiple friction wheels 13 and pressure pieces 22 to drive the handrail belt 5 at the same time, and each group of friction wheels 13 and pressure pieces 22 act on the handrail belt 5 independently, even if the friction force of one or several groups of friction wheels 13 and pressure pieces 22 on the handrail belt 5 is reduced or even disappears, the remaining friction wheels 13 and pressure pieces 22 can still act on the handrail belt 5, and the handrail belt 5 can run smoothly, effectively avoiding the slipping of the handrail belt 5 due to the loss of friction of some friction wheels 13.

[0063] Furthermore, during the actual installation, the length of the chain between each group of handrail drive units 1 can also be set to different lengths, so that several groups of handrail drive units 1 can be evenly distributed on the entire handrail belt 5, and the driving force on the handrail belt 5 is more stable. Of course, the length of the chain between each group of handrail drive units 1 can be set shorter, so that several groups of handrail drive units 1 can be concentratedly distributed, which is convenient for centralized handrail drive units 1 to be repaired.

[0064] Example 4: Figures 1 to 7 As shown, a moving walkway includes the expandable handrail linear drive device in the above-mentioned embodiments 1 to 3, and also includes a truss 4 and a handrail belt 5, and a plurality of handrail drive units 1 are distributed along the length direction of the truss 4; a chain drive shaft 62 is arranged on the truss 4, and the chain drive shaft 62 and the mounting shaft 12 at the end of the expandable handrail linear drive device are driven by a chain; the friction wheel 13 and the clamping piece 22 are clamped on both sides of the handrail belt 5.

[0065] A side frame 41 is provided on the side wall of the truss 4, and a plurality of handrail drive units 1 are fixedly provided on the side frame 41. A groove is provided on the side frame 41, so that the support 11 can be directly installed on the side frame 41, so as to facilitate the expansion of the number of handrail drive units 1.

[0066] A driving main unit 66 and an output spindle 61 are provided at the end of the truss 4, and the driving main unit 6 includes but is not limited to a motor. The output spindle 61 and the driving main unit 6 are driven by a chain, and the output spindle 61 and the chain drive shaft 62 are also driven by a chain. The driving main unit 6 drives the mounting shafts 12 on the plurality of handrail drive units 1 to rotate through the output spindle 61, the chain drive shaft 62 and the chain. The entire transmission structure is simple and compact, and the transmission efficiency is high.

[0067] In one of the embodiments, a limit adjustment assembly 7 is further provided on the truss 4, and the limit adjustment assembly 7 includes limit bolts 71 arranged at both ends of the support 11 in the horizontal direction, and a limit nut 72 is arranged on the limit bolt 71. Side blocks 15 are arranged on both sides of the support 11 in the horizontal direction, and side holes 151 are provided on the mounting side blocks 15. The limit bolts 71 pass through the side holes 151, and the limit nuts 72 abut against the outer side surfaces of the side blocks 15 on both sides.

[0068] In this embodiment, the limit adjustment assembly 7 is mainly used to adjust the position of the support 11. Therefore, the limit adjustment assembly 7 is provided on both sides of each support 11. When installing the support 11, the position of the support 11 can be adjusted by rotating the limit nut 72, so that the chain can be installed conveniently, and after installation, the chain can be tightened by adjusting the position of the support 11.

[0069] A moving walkway in the present application is equipped with an expandable handrail linear drive device, which can determine the number of handrail drive units 1 according to the length of the handrail belt. The adjacent handrail drive units 1 are also driven by chains, so that the power on the installation shaft 12 is transmitted in sequence through the chain, and all the installation shafts 12 rotate synchronously. In addition, the installation shafts 12 are driven by chains, and the chains will not slip, which can ensure that the installation shaft 12 rotates, driving multiple friction wheels 13 to drive the handrail belt 5 at the same time, increasing the driving force of the handrail belt 5 and preventing the handrail belt 5 from slipping. Furthermore, since the present application adopts multiple friction wheels 13 and pressure pieces 22 to drive the handrail belt 5 at the same time, and each group of friction wheels 13 and pressure pieces 22 act on the handrail belt 5 independently, even if the friction force of one or several groups of friction wheels 13 and pressure pieces 22 on the handrail belt 5 is reduced or even disappears, the remaining friction wheels 13 and pressure pieces 22 can still act on the handrail belt 5, and the handrail belt 5 can run smoothly, effectively avoiding the slipping of the handrail belt 5 due to the loss of friction of some friction wheels 13.

[0070] Furthermore, during the actual installation, the length of the chain between each group of handrail drive units 1 can also be set to different lengths, so that several groups of handrail drive units 1 can be evenly distributed on the entire handrail belt 5, and the driving force on the handrail belt 5 is more stable. Of course, the length of the chain between each group of handrail drive units 1 can be set shorter, so that several groups of handrail drive units 1 can be concentratedly distributed, which is convenient for centralized handrail drive units 1 to be repaired.

[0071] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. An expandable handrail linear drive device, characterized in that it comprises: A plurality of handrail drive units, each of which comprises a support and a plurality of mounting shafts arranged on the support, adjacent mounting shafts are driven by chains, and each mounting shaft is provided with a friction wheel; A clamping assembly, comprising a plurality of clamping wheels matched with the friction wheels on the mounting shaft and a clamping member for pushing the clamping wheels to move toward the friction wheels; The mounting shafts of adjacent handrail drive units are driven by chains.

2. The expandable handrail linear drive device according to claim 1, characterized in that: At least two driving sprockets are arranged on each installation shaft, and adjacent installation shafts are driven by chains wound around the driving sprockets.

3. The expandable handrail linear drive device according to claim 1 or 2, characterized in that: Two mounting shafts are arranged on the support.

4. The expandable handrail linear drive device according to claim 3 is characterized in that: The pressing piece is an arc-shaped pressing leaf spring, and pressing wheels are arranged at both ends of the pressing leaf spring.

5. The expandable handrail linear drive device according to claim 1 or 2, characterized in that: A chain tensioning device is arranged on the support, and the chain tensioning device is arranged on adjacent installation shafts to tension the transmission chain between the two installation shafts.

6. The expandable handrail linear drive device according to claim 5, characterized in that: The chain tensioning device comprises a tensioning member abutting against the chain and a pushing member pushing the tensioning member to press against the chain.

7. The expandable handrail linear drive device according to claim 5, characterized in that: The surface where the tensioning piece contacts the chain is an arc surface, and the pushing piece is a pushing spring that pushes the tensioning piece to contact the chain.

8. The expandable handrail linear drive device according to claim 1 or 2, characterized in that: The support is provided with a slide groove, the direction of which is the same as the direction of a line connecting a plurality of installation shafts; a sliding block is provided in the slide groove, and the installation shaft is fixedly provided on the sliding block.

9. A moving walkway, characterized in that: The expandable handrail linear drive device comprises any one of claims 1 to 8, further comprising a truss and a handrail belt, wherein a plurality of handrail drive units are distributed along the length direction of the truss; a chain drive shaft is arranged on the truss, and the chain drive shaft and the mounting shaft at the end of the expandable handrail linear drive device are driven by a chain; The friction wheel and the clamping piece are pressed on both sides of the handrail.

10. The moving walkway according to claim 9, characterized in that: A limit adjustment component is also provided on the truss, which includes limit bolts arranged at both ends of the support in the horizontal direction, limit nuts are arranged on the limit bolts, side blocks are arranged on both sides of the support in the horizontal direction, side holes are arranged on the mounting side blocks, and the limit bolts pass through the side holes.

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