CN112573335A

CN112573335A - Chain tensioning device of escalator

Info

Publication number: CN112573335A
Application number: CN202011416812.6A
Authority: CN
Inventors: 刘涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2021-03-30

Abstract

The invention relates to the technical field of escalators and discloses an escalator chain tensioning device which comprises a driving wheel, a driving gear, a chain, an escalator shell and a current transformer, wherein the driving wheel and the driving gear are in transmission connection through the chain, a parallel support is fixedly arranged on the escalator shell and positioned between the driving wheel and the chain, a driven wheel gear is movably arranged at the bottom of the parallel support and meshed with the right side of the chain, a square sleeve is fixedly arranged at the top of the parallel support, and a steel block is movably sleeved in the square sleeve. Through the setting of steel system piece and pinch roller, utilize the gravity of steel system piece, exert decurrent pressure to the pinch roller, and then exert decurrent pressure to the chain between action wheel and the drive gear for the chain carries out the pressurized tensioning, effectively prevents its shake in transmission in-process, and the tooth phenomenon is jumped with the taking off that the extension too caused, effectively increases driven security.

Description

Chain tensioning device of escalator

Technical Field

The invention relates to the technical field of escalators, in particular to an escalator chain tensioning device.

Background

Along with the development of economy, the application of the escalator is more and more extensive and the use quantity is more and more, chain and sprocket are used to many places in the escalator, through the operation of its cooperation drive relevant part, wherein one of the most crucial transmission is the transmission between gear and the drive gear that the motor drove, but the phenomenon that the chain can appear lax when the design or in-process of using, easily causes chain and sprocket to disengage the tooth, jump the tooth scheduling problem, lead to the travelling comfort and the stability that the escalator used to reduce, probably cause the accident simultaneously, then, need utilize the tensioning ware to take up the tension to the chain, but the tensioning ware that uses at present has some deficiencies, as follows:

the existing tensioning device is complex in structure, too large in size, not sensitive enough in reaction, and not capable of timely adjusting along with the change of the loosening degree of the chain, and needs to be replaced after the chain is extended to a certain degree, the existing tensioning device cannot timely provide replacement information, so that the chain is continuously used, the escalator is caused to shake, even the chain is broken, and accidents are caused.

In case the transmission breaks off, drive gear appears losing power in the twinkling of an eye, causes the quick gliding of automatic escalator easily, to the harm that causes of taking personnel, and current overspeed device tensioner can't respond to the emergence of this kind of condition equally, and the functionality is not enough.

Disclosure of Invention

The invention provides an escalator chain tensioning device which has the advantages of good tensioning effect and high safety and solves the problems in the background art.

The invention provides the following technical scheme: an escalator chain tensioning device comprises an active wheel, a driving gear, a chain, an escalator shell and a current transformer, wherein the active wheel and the driving gear are connected through chain transmission, a parallel support is fixedly arranged on the escalator shell and between the active wheel and the chain, a driven wheel gear is movably arranged at the bottom of the parallel support and meshed with the right side of the chain, a square sleeve is fixedly arranged at the top of the parallel support, a steel block is sleeved on the square sleeve in a movable manner, an electromagnet is fixedly arranged in the square sleeve and above the steel block, a long resistor is fixedly arranged at the top of the steel block and electrically connected with a circuit in the electromagnet, a support frame is fixedly arranged on the bottom surface of the steel block, a pressing wheel is movably arranged at the bottom end of the support frame and meshed with the chain, the two ends of the pinch roller are movably connected with ratchet devices, the inner sides of the parallel supports are provided with clamping grooves, the ratchet devices are movably clamped with the clamping grooves, and the current transformer is electrically connected with the electromagnets.

Preferably, ratchet includes square case, square case and ratchet wheel, square case be the positive direction and with draw-in groove activity joint, ratchet wheel and pinch roller's both ends fixed connection, the even movable mounting arc stopper in square case's inside, ratchet wheel and arc stopper swing joint.

Preferably, the equal even fixed mounting in both sides of steel piece has the stopper, the inside of square cover and the both sides movable mounting who is located the stopper have the chucking device, stopper and chucking device swing joint.

Preferably, the clamping device comprises a clamping block and an elastic rope, the top of the clamping block is movably connected with the square sleeve, the spring is fixedly connected to the top of the right side of the clamping block, the right end of the spring is fixedly connected with the square sleeve, the elastic rope is movably connected with the square sleeve, and the spring is movably connected with the elastic rope.

Preferably, the length of the long resistor is smaller than the vertical distance between the pressing wheel and the driven wheel gear.

The invention has the following beneficial effects:

1. through the setting of steel system piece and pinch roller, utilize the gravity of steel system piece, exert decurrent pressure to the pinch roller, and then exert decurrent pressure to the chain between action wheel and the drive gear for the chain carries out the pressurized tensioning, effectively prevents its shake in transmission in-process, and the tooth phenomenon is jumped with the taking off that the extension too caused, effectively increases driven security.

2. Through the setting from the wheel gear, make follow drive gear reverse rotation from the wheel gear, when the chain suddenly splits at the transmission in-process, it can be under the pushing down of pinch roller, with from the wheel gear meshing, make mutual locking between the three, effectively prevent the automatic escalator gliding, improve appendage operation security, setting through ratchet simultaneously, make the pinch roller only can clockwise rotate, and when being thrown away fast behind the chain fracture, pinch roller and from the wheel gear meshing, carry on spacingly to the wheel gear, prevent from the wheel gear reversal, and then carry out the chucking to the chain, prevent drive gear reversal, lead to the elevator gliding, the accident appears, further increase the security of elevator operation.

3. Through the setting of electro-magnet and long resistance, make along with the lax of chain, the steel piece descends the in-process gradually and carries long resistance and electro-magnet and break away from gradually, and then the electric current in the increase electro-magnet, keep along with the increase of the distance between electro-magnet and the steel piece on the one hand, the electro-magnet still can provide the appeal of relative stability to the steel piece, guarantee that the pinch roller keeps in the certain limit to the pressure on the chain, guarantee chain drive's stability and security, on the other hand, after the current value reaches certain numerical value, send a signal to the center control system of automatic escalator through current transformer, stop the operation of elevator, the chain is changed in the maintenance.

Drawings

FIG. 1 is a schematic front view of the structure of the present invention;

FIG. 2 is a schematic view of the structure of the present invention in a compressed state;

FIG. 3 is a schematic side view of the structure of the present invention;

FIG. 4 is a front view of a partial schematic view of a structural hold-down device of the present invention;

FIG. 5 is a schematic circuit diagram of an electromagnet and a long resistor according to the present invention;

FIG. 6 is a schematic cross-sectional view of a ratchet device according to the present invention;

FIG. 7 is an enlarged view of the point A in FIG. 1.

In the figure: 1. a driving wheel; 2. a drive gear; 3. a chain; 4. an escalator outer casing; 5. a parallel support; 6. a slave wheel gear; 7. a square sleeve; 8. making a steel block; 9. a long resistance; 10. an electromagnet; 11. a support frame; 12. a pinch roller; 13. a limiting block; 14. a clamping device; 141. a clamping block; 142. a spring; 143. an elastic cord; 15. a ratchet gear; 151. a square box; 152. a ratchet gear; 153. an arc-shaped limiting block; 16. a card slot; 17. a current transformer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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. 1-7, an escalator chain tensioning device comprises a driving wheel 1, a driving gear 2, a chain 3, an escalator casing 4 and a current transformer 17, wherein the driving wheel 1 and the driving gear 2 are in transmission connection through the chain 3, a parallel bracket 5 is fixedly arranged on the escalator casing 4 and positioned between the driving wheel 1 and the chain 3, a driven wheel gear 6 is movably arranged at the bottom of the parallel bracket 5 and meshed with the right side of the chain 3 from the driven wheel gear 6, a square sleeve 7 is fixedly arranged at the top of the parallel bracket 5, a steel block 8 is movably sleeved in the square sleeve 7, an electromagnet 10 is fixedly arranged in the square sleeve 7 and positioned above the steel block 8, a long resistor 9 is fixedly arranged at the top of the steel block 8, the long resistor 9 is electrically connected with a circuit in the electromagnet 10, a support frame 11 is fixedly arranged at the bottom surface of the steel block 8, a pinch roller 12 is movably arranged at the bottom end, the pinch roller 12 is meshed with the chain 3, two ends of the pinch roller 12 are movably connected with ratchet wheel devices 15, the inner side of the parallel support 5 is provided with a clamping groove 16, the ratchet wheel devices 15 are movably clamped with the clamping groove 16, and the current transformer 17 is electrically connected with the electromagnet 10.

Wherein, ratchet 15 includes square case 151, square case 151 and ratchet wheel 152, square case 151 is the positive direction and with draw-in groove 16 activity joint, ratchet wheel 152 and the both ends fixed connection of pinch roller 12, the even movable mounting arc stopper 153 in square case 151, ratchet wheel 152 and arc stopper 153 swing joint, make under the drive of chain 3, pinch roller 12 only can rotate clockwise, carry out spacingly to pinch roller 12, make the fracture back of chain 3, when pinch roller 12 and the meshing of trailing wheel gear 6, carry on spacingly to trailing wheel gear 6, the prevention is from trailing wheel gear 6 reversal, and then carry out the chucking to chain 3, prevent its reversal, lead to the elevator gliding, the accident appears, increase the security of elevator operation.

Wherein, the equal even fixed mounting in both sides of steel piece 8 has stopper 13, the inside of square cover 7 and the both sides movable mounting that is located stopper 13 have chucking device 14, stopper 13 and 14 swing joint of chucking device, when steel piece 8 carries support frame 11 and pinch roller 12 to descend and compresses tightly chain 3, chucking device 14 is spacing to stopper 13, make steel piece 8 can only descend and can not rise, so effectively carry out the tensioning to chain 3, compress tightly it simultaneously, prevent its transmission in-process shake, and with action wheel 1, chain 3 breaks away from, further increase chain drive's security.

Wherein, chucking device 14 includes fixture block 141 and elasticity rope 143, fixture block 141's top and square cover 7 swing joint, fixture block 141's right side top fixedly connected with spring 142, spring 142's right-hand member and square cover 7 fixed connection, elasticity rope 143 and square cover 7 swing joint, spring 142 and elasticity rope 143 swing joint, during the maintenance, pulling elasticity rope 143 for fixture block 141 retracts in the inside of square cover 7, and then releases the chucking to steel piece 8, can make steel piece 8 return.

The length of the long resistor 9 is smaller than the vertical distance between the pressing wheel 12 and the driven wheel gear 6, when the chain 3 is broken, the pressing wheel 12 loses the supporting force and rapidly descends to be in contact with the driven wheel gear 6, at the moment, the long resistor 9 is separated from the circuit of the electromagnet 10, the circuit of the electromagnet 10 is interrupted, the pressure of the steel block 8 on the driven wheel gear 6 reaches the maximum, and the driven wheel gear 6 is limited and locked.

The working principle is that the driving wheel 1 rotates anticlockwise, the driving gear 2 is driven to rotate anticlockwise through the chain 3, the driving gear 2 is driven to rotate clockwise from the gear wheel 6, the chain 3 drives the pressing wheel 12 to rotate clockwise, the pressure of the pressing wheel 12 on the chain 3 is obtained by subtracting a certain attraction force of the electromagnet 10 on the steel block 8 from the gravity of the steel block 8, when the chain 3 is loosened and extended gradually in the using process, the steel block 8 descends gradually to press the chain 3, and in the gradual descending process, the long resistor 9 and the electromagnet 10 are gradually separated, so that the current in the electromagnet 10 is increased, the distance between the electromagnet 10 and the steel block 8 is increased, the electromagnet 10 still can provide a relatively stable attraction force on the steel block 8, the pressure of the pressing wheel 12 on the chain 3 is guaranteed to be kept within a certain range, meanwhile, when the steel block 8 carries the pressing wheel 12 to descend to press the chain 3, the clamping block 141 limits the limiting block 13, so that the steel block 8 can only descend but cannot ascend, the chain 3 is effectively tensioned and is compressed to prevent the chain from shaking in the transmission process and disengaging from the driving wheel 1 and the chain 3, when the chain 3 is loosened to a certain degree, the chain 3 is still in contact with the driven wheel gear 6, meanwhile, the long resistor 9 descends to a certain height along with the steel block 8, the resistor connected into the electromagnet 10 is reduced, the current in the electromagnet 10 reaches a certain value, and a signal is transmitted to the outside through the current transformer 17 to remind a maintenance worker to replace the chain in time; when a chain breaks suddenly at a certain moment, it is divided into two cases, one of which is: the pressing wheel 12 is pressed downwards to be meshed with the driven gear 6, and the driving gear 2 and the driven gear 6 are always opposite in transmission direction, so that the driving gear 2 and the driven gear are mutually dragged to clamp the driving gear 2, the escalator is stopped, and the escalator is effectively prevented from sliding downwards to cause accidents; the second step is as follows: after the chain 3 is broken, the chain is not meshed with the driven gear 6 and slides away, at this time, the pressing wheel 12 loses the supporting force, descends and is meshed with the driven gear 6, and the pressing wheel 12 can only rotate clockwise under the limit of the ratchet device 15, so that the situation that the driven gear 6 cannot rotate clockwise is limited, the escalator slides downwards, the driving gear 2 needs to continue to rotate, and the escalator is limited and stopped.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an automatic staircase chain overspeed device tensioner, includes action wheel (1), drive gear (2), chain (3), staircase shell (4) and current transformer (17), action wheel (1) and drive gear (2) are connected its characterized in that through chain (3) transmission: the escalator comprises an escalator shell (4), a parallel support (5) is fixedly mounted between an driving wheel (1) and a chain (3), the bottom of the parallel support (5) is movably mounted with a driven wheel gear (6), the driven wheel gear (6) is meshed with the right side of the chain (3), a square sleeve (7) is fixedly mounted at the top of the parallel support (5), a steel block (8) is sleeved in the square sleeve (7), an electromagnet (10) is fixedly mounted in the square sleeve (7) and above the steel block (8), a long resistor (9) is fixedly mounted at the top of the steel block (8), the long resistor (9) is electrically connected with a circuit in the electromagnet (10), a support frame (11) is fixedly mounted at the bottom of the steel block (8), and a pressing wheel (12) is movably mounted at the bottom of the support frame (11), pinch roller (12) and chain (3) meshing, the both ends swing joint of pinch roller (12) has ratchet (15), draw-in groove (16) have been seted up to the inboard of parallel support (5), ratchet (15) and draw-in groove (16) activity joint, current transformer (17) and electro-magnet (10) electric connection.

2. An escalator chain tensioner according to claim 1, characterized in that: ratchet (15) are including square case (151), square case (151) and ratchet wheel (152), square case (151) be the positive direction and with draw-in groove (16) activity joint, ratchet wheel (152) and the both ends fixed connection of pinch roller (12), the inside even movable mounting arc stopper (153) of square case (151), ratchet wheel (152) and arc stopper (153) swing joint.

3. An escalator chain tensioner according to claim 1, characterized in that: the equal even fixed mounting in both sides of steel piece (8) has stopper (13), the inside of square cover (7) and the both sides movable mounting that is located stopper (13) have chucking device (14), stopper (13) and chucking device (14) swing joint.

4. An escalator chain tensioner according to claim 3, characterized in that: the clamping device (14) comprises a clamping block (141) and an elastic rope (143), the top of the clamping block (141) is movably connected with the square sleeve (7), the top of the right side of the clamping block (141) is fixedly connected with a spring (142), the right end of the spring (142) is fixedly connected with the square sleeve (7), the elastic rope (143) is movably connected with the square sleeve (7), and the spring (142) is movably connected with the elastic rope (143).

5. An escalator chain tensioner according to claim 1, characterized in that: the length of the long resistor (9) is smaller than the vertical distance between the pressing wheel (12) and the driven wheel gear (6).