CN217972159U - Synchronous belt transmission structure and elevator door opening and closing device - Google Patents

Abstract

The utility model relates to an elevator technical field especially relates to a synchronous belt drive structure and lift-cabin door switching device. A synchronous belt transmission structure comprises a synchronous belt, wherein the synchronous belt can transmit; the synchronous belt transmission structure further comprises a belt clamp and a transmission arm, the belt clamp is connected to the synchronous belt, one end of the transmission arm is rotationally connected with the belt clamp, the other end of the transmission arm is connected to a driven piece, and the transmission arm can rotate relative to the belt clamp. The utility model has the advantages that: when the driven piece suddenly stops, the synchronous belt is continuously driven by the retaining force of the driving unit, and the transmission arm is rotationally connected with the belt clamp, so that the transmission arm can rotate relative to the synchronous belt, the synchronous belt is protected, and the synchronous belt is prevented from being broken.

Description

Synchronous belt transmission structure and elevator door opening and closing device

Technical Field

The utility model relates to an elevator technical field especially relates to a synchronous belt drive structure and lift-cabin door switching device.

Background

An elevator door motor, also called a door opening machine, is an opening and closing device of an elevator door. When the elevator door opening and closing mechanism receives an elevator door opening and closing signal, an elevator door motor controls a door opening motor through a self-contained control system, torque generated by the motor is converted into force in a specific direction, and the elevator door is closed or opened.

The hold-in range is the important component part of elevator door machine, and the hold-in range is as transmission device for with the drive power of the motor that opens the door through the hold-in range transmission to the car door of driven piece like the elevator, realize the car door open and close among the current hold-in range transmission structure, drive unit includes the motor, the motion of motor drive hold-in range. The synchronous belt and the elevator door (such as a car door) are usually fixedly connected to the hanging plate through a connecting piece, and the hanging plate is synchronously moved or in transmission connection with the car door. In the door opening and closing process of the door machine, the motor drives the synchronous belt transmission structure to drive the hanging plate and the car door to realize the door opening and closing action. However, when the elevator door is opened and closed to move in place, the door opening motor still has a holding power, can drive the hold-in range and drive the connecting piece to continue to move for a short distance, however the link plate has spacing and can not continue to move along with the hold-in range, so can cause to have certain angle between current hold-in range connecting piece and the hold-in range, lead to the hold-in range to take place to twist reverse, reduce the life of hold-in range, serious then leads to the hold-in range fracture.

The driving unit (door opening motor) is controlled by the frequency converter to realize the opening and closing action of the elevator door. However, in the prior art, the driving unit and the frequency converter are both independent of the installation of the bottom plate of the door machine, and the driving unit and the frequency converter are easy to collide with each other because of no protective outer cover, are not beneficial to maintenance, and simultaneously, cause the volume of the elevator opening and closing device to be huge. In addition, the door knife in the elevator door machine is usually directly driven by a motor, for example, the relative movement of the left door knife and the right door knife is realized by fixedly connecting a connecting piece and a synchronous belt, and the transmission structure is not beneficial to the stability of the movement of the door knife. There are other problems such as: the existing door lock switch is a single-contact switch, two single-contact switches need to be arranged in a door machine system, and a frequency converter also needs to receive two signals, so that the debugging is not facilitated, and the structure is complex. Therefore, the elevator door motor system needs to be improved on the structure.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model discloses a solve above-mentioned hold-in range and appear twisting reverse and then reduce life's technical problem easily in transmission process, the utility model provides a can prevent that the hold-in range from taking place torsional synchronous belt drive structure, technical scheme is as follows:

a synchronous belt transmission structure comprises a synchronous belt, wherein the synchronous belt can transmit; the synchronous belt transmission structure further comprises a belt clamp and a transmission arm, the belt clamp is connected to the synchronous belt, one end of the transmission arm is rotatably connected with the belt clamp, the other end of the transmission arm is connected to a driven piece, and the transmission arm can rotate relative to the belt clamp.

It can be understood that, when the driven member suddenly stops, the timing belt continues to be driven due to the holding force of the motor, and the driving arm is rotatably connected to the belt clip so that the driving arm can rotate relative to the timing belt, thereby protecting the timing belt and preventing the timing belt from being broken. The utility model discloses a synchronous belt drive structure is not limited to only connect the lift-cabin door through coupling assembling, still can use other fields, for example, climbing mechanism, manipulator etc. that need go up and down. The driving arm is connected with the articulated realization rotation of area clamp accessible, or realizes rotating through setting up antifriction bearing and connect, and area clamp and hold-in range accessible can be dismantled to connect and realize fixed connection, also can dismantle through the non and connect and realize fixed connection, can dismantle the connection can be joint, spiro union etc. the non can be dismantled and connect for modes such as welding, splice and connect, and area clamp and hold-in range still can be connected for rotating, as long as the area clamp can be driven by the hold-in range and remove together can.

In one embodiment, the belt clip is provided with a mounting hole, one end of the transmission arm is provided with a rotating shaft, and the rotating shaft is arranged in the mounting hole in a penetrating way and is rotatably connected with the hole wall of the mounting hole.

So set up, simple structure. In this embodiment, the one end of axis of rotation can stretch out outside the mounting hole, and the axis of rotation that is located outside the mounting hole carries on spacingly through the round pin axle, or, sets up the step on the pore wall of mounting hole, and the external diameter of the one end of axis of rotation is great, and the axis of rotation joint is in the mounting hole, and the great one end butt of external diameter realizes the ascending spacing of axis of rotation, prevents that the axis of rotation from breaking away from in the mounting hole.

In one embodiment, the driving arm includes a main body section, a connecting section and a mounting section, wherein two ends of the connecting section are respectively connected to the main body section and the mounting section, the main body section is connected to the belt clip, and the mounting section is used for connecting the driven member.

In one embodiment, the connecting section is bent and extended to form one or more sections.

So set up, the linkage segment can be bent according to the practical application occasion of being driven piece, not only can avoid other spare parts, can extend the erection segment to being driven piece department moreover and connect, simultaneously, bend and can also play the reinforcing effect.

The utility model discloses still provide following technical scheme:

an elevator door opening and closing device comprises a door motor bottom plate, a driving unit, a connecting assembly and the synchronous belt transmission structure, wherein the driving unit is arranged on the door motor bottom plate and connected with the synchronous belt, and the connecting assembly is respectively connected with a driving arm and an elevator door; coupling assembling includes link plate and door sword, the link plate is connected with elevator car door, door sword fixed mounting in on the link plate, the link plate warp the driving arm with the hold-in range is connected.

It can be understood that the door sword is connected with direct and driving arm, that is to say, the door sword is not directly driven by the hold-in range, drives through the link plate, for asynchronous door sword, can improve stability. Door sword and driving arm respectively with link plate detachably fixed connection, also can be non-detachably fixed connection, the driving arm can also be connected for rotating with the link plate, as long as the driving arm can drive the link plate and realize removing can.

In one embodiment, the driving unit includes a motor, a driving wheel and a driven wheel, the driving wheel and the driven wheel are respectively disposed at two ends of the synchronous belt, and an output shaft of the motor is connected to the driving wheel.

So set up, simple structure.

In one of them embodiment, the synchronous belt drive structure still include with the converter that the drive unit electricity is connected, the motor the action wheel from the driving wheel the hold-in range the converter is all located the same side of door machine bottom plate.

So set up, can reduce the holistic volume of lift-cabin door switching device, be convenient for transportation and installation to, all locate drive unit, hold-in range and converter the same side of door machine bottom plate, promptly, motor, converter, action wheel and all locate one side that the door machine bottom plate is equipped with the hold-in range from the driving wheel, can surveyability when follow-up maintenance, convenient maintenance.

In one embodiment, an extension plate is arranged on the bottom plate of the gantry crane and extends towards the transmission arm and is fixedly connected with the transmission arm.

So set up, the extension board plays the supporting role to the driving arm.

It can be understood that the door knife is connected with the transmission arm directly, that is to say, the door knife is not directly driven by the synchronous belt, is driven through the link plate, and is asynchronous door knife, stability can be improved. Door sword and driving arm respectively with link plate detachably fixed connection, also can be non-detachably fixed connection, the driving arm can also be connected for rotating with the link plate, as long as the driving arm can drive the link plate and realize removing can.

In one embodiment, the number of the hanging plates is two, the elevator door opening and closing device further comprises a door lock switch, the door lock switch is a double-contact switch, and the hanging plates are driven by the driving unit and the synchronous belt to form a contact/disconnection matching relation with the door lock switch in the displacement process.

So set up, can simplify the structure, be convenient for the debugging, need not to set up two switches.

In one embodiment, a column pad is arranged on one side of the hanging plate, an external thread is arranged at one end, close to the hanging plate, of the column pad, the column pad is in threaded connection with the hanging plate, an internal thread is arranged inside one end, far away from the hanging plate, of the column pad, and a fastener penetrates through the door knife and is in threaded connection with the column pad.

Compared with the prior art, the utility model provides a synchronous belt drive structure is connected through rotating the driving arm with the area clamp, when being stopped suddenly by the driving piece, the hold-in range because the drive of drive unit still has the holding power and can continue to move a period, and the driving arm rotates with the area clamp to be connected for the driving arm can be rotatory for the hold-in range, and can not lead to the hold-in range to twist reverse, thereby the protection hold-in range avoids breaking because of twisting. The driving unit and the frequency converter are both arranged on the bottom plate of the gantry crane, so that the size can be reduced, and the installation and the transportation are convenient; in the elevator door opening and closing device of the utility model, the asynchronous door knife is driven by the hanging plate to move, thus improving the stability of the door knife; in addition, the door lock switch adopts a double-contact switch, so that the structure can be simplified, and the debugging is convenient.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention or the conventional technologies, the drawings required to be used in the description of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is an exploded view of a part of a synchronous belt transmission structure according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the belt clip and timing belt;

FIG. 3 is a front view of the belt clip;

FIG. 4 is a side view of the belt clip;

FIG. 5 is a perspective view of the actuator arm;

fig. 6 is a perspective view of an elevator door opening and closing device;

fig. 7 is a partial enlarged view of a portion a in fig. 6;

fig. 8 is a front view of the elevator door opening and closing device attached to the car door;

fig. 9 is a partial structural view of the elevator door opening and closing device;

fig. 10 is a perspective view of the pillar pad.

The symbols in the drawings represent the following meanings:

1000. an elevator door opening and closing device; 100. a synchronous belt transmission structure; 10. a door machine bottom plate; 11. an extension plate; 20. a synchronous belt; 21. a clamping block; 30. a belt clip; 31. mounting holes; 32. a housing hole; 33. a card slot; 34. the body block; 341. a containing groove; 35. a matching block; 351. a protrusion; 36. connecting holes; 40. a transmission arm; 41. a rotating shaft; 42. a main body section; 43. a connection section; 431. a first stage; 432. a second stage; 44. an installation section; 50. a drive assembly; 51. a drive unit; 52. a driven wheel; 53. a motor; 54. a driving wheel; 60. a frequency converter; 200. a connecting assembly; 201. hanging plates; 202. a door knife; 203. a post pad; 204. a door lock switch; 2000. car door.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The use of the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions in the description of the invention is for illustrative purposes only and does not represent a unique embodiment.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

In the present disclosure, unless otherwise explicitly stated or limited, a first feature "on" or "under" a second feature may mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and 9, the present invention provides a synchronous belt transmission structure 100 connected to a driven member for driving the driven member to move. The driven member may be any driven member that needs to be moved, such as a jack mechanism that needs to be raised and lowered, a hitch plate 201 attached to an elevator car door 2000, or a vane 202 attached to an elevator door machine.

The synchronous belt drive structure 100 includes a synchronous belt 20, a belt clip 30, and a driving arm 40, the synchronous belt 20 is driven by a driving unit 51, the synchronous belt 20 can transmit a driving force of the driving unit 51 to a driven member, the belt clip 30 is connected to the synchronous belt 20 and rotatably connected to the driving arm 40, and one end of the driving arm 40, which is away from the belt clip 30, is connected to the driven member. It can be understood that, in the transmission process of the synchronous belt 20, when the driven member stops after moving to the right position, the synchronous belt 20 still has a holding force due to the driving unit 51, and will continue to move for a short time along with the driving unit 51 driving the driving arm 40, and the driving arm 40 is connected with the belt clip 30 through rotation, so that the driving arm 40 can keep synchronous movement with the synchronous belt 20, and the situation that the driving arm 40 cannot generate a certain angle with the synchronous belt 20 along with the synchronous movement of the synchronous belt 20, and further the synchronous belt 20 is twisted is avoided. When being driven piece for the link plate 201 of connecting elevator car door 2000, because elevator car door 2000's door machine drives the belt by drive assembly and operates, and car door 2000 puts in place the back in the switching, and hold-in range 20 receives the drive unit 51 drive can continue to move a small segment distance, and link plate 201 is because of the restriction, can't be along with hold-in range 20 moves together, leads to forming certain angle between link plate 201 and the hold-in range 20, and then leads to hold-in range 20 to take place to twist reverse and fracture, the utility model discloses a driving arm 40 is connected with the rotation of belt clamp 30, and in the twinkling of an eye of the lift-in door switching puts in place, the stop motion, hold-in range 20 is rotatory for driving arm 40, can prevent that hold-in range 20 from twisting and breaking.

The belt clip 30 is made of plastic material and is light in weight.

In one embodiment, the belt clip 30 defines a mounting hole 31, and the actuator arm 40 has a rotating shaft 41 formed on a portion thereof, the rotating shaft 41 being disposed through the mounting hole 31 and rotatably coupled to the belt clip 30. Outside the one end of axis of rotation 41 can stretch out mounting hole 31, the axis of rotation 41 that is located the mounting hole 31 outside carries on spacingly through the round pin axle, or, sets up the step on the pore wall of mounting hole 31, and the external diameter of the one end of axis of rotation 41 increases, and 41 joints of axis of rotation are in mounting hole 31, and the great one end of external diameter butt is on the step, realizes 41 ascending spacings of axis of rotation, prevents that axis of rotation 41 from breaking away from in the mounting hole 31.

In other embodiments, a rolling bearing may be further disposed on the belt clip 30, an outer side of the rolling bearing is fixedly connected to the belt clip 30, and an inner side of the rolling bearing is in interference fit with the rotating shaft 41, so as to achieve rotational connection therebetween.

Referring to fig. 2, the belt clip 30 is provided with a receiving hole 32 for the synchronous belt 20 to pass through, the outer side surface of the synchronous belt 20 is provided with a plurality of clamping blocks 21 arranged at intervals, the hole wall of the receiving hole 32 is provided with a plurality of clamping grooves 33, and a part of the clamping blocks 21 are clamped in the clamping grooves 33, so that the synchronous belt 20 drives the belt clip 30 to move, and the belt clip is prevented from slipping. The fixture block 21 may have a prism shape, a truncated pyramid shape, a semi-cylinder shape, etc., if the fixture block 21 is a prism, the clamping groove 33 is also a prism, if the fixture block 21 is a semi-cylinder, the clamping groove 33 is also a semi-cylinder, if the fixture block 21 is a truncated pyramid, the clamping groove 33 is also a truncated pyramid, and the clamping groove 33 and the fixture block 21 are matched in shape.

The belt clip 30 includes a body block 34 and a mating block 35, the body block 34 is fixedly connected to the mating block 35, a receiving groove 341 is formed on a side surface of the body block 34 facing the mating block 35, the receiving groove 341 is matched with the mating block 35 to form a receiving hole 32, a protrusion 351 is formed on a side surface of the mating block 35 facing the body block 34, and the protrusion 351 is inserted into the receiving groove 341 and abuts against a side surface of the timing belt 20 far from the clamping block 21, so as to clamp the timing belt 20. After the body block 34 and the matching block 35 are installed, they can be connected in a detachable manner or in a non-detachable manner, for example, they can be connected by welding, clamping, screwing, gluing, etc.

In one embodiment, the mounting hole 31 is provided at the middle of the belt clip 30, and in order to avoid the mounting hole 31, there are two receiving grooves 341 provided at both sides of the mounting hole 31, respectively, and there are two protrusions 351, the two protrusions 351 being spaced apart from each other. In other embodiments, the mounting hole 31 may also be located on the side of the belt clip 30 near the end.

Referring to fig. 3 and 4, the belt clip 30 has a side surface formed with a coupling hole 36, and the coupling hole 36 penetrates the body block 34 and the engagement block 35, respectively, for insertion of a fastener, thereby fixedly coupling the body block 34 and the engagement block 35.

In one embodiment, the four attachment holes 36 are provided, two by two, on either side of the receiving hole 32, respectively, to stably rotatably attach the driving arm 40 to the belt clip 30. In other embodiments, the connection holes 36 may be disposed on both sides of the mounting hole 31, or the connection holes 36 may be disposed on both sides of the receiving hole 32 and both sides of the mounting hole 31.

Referring to fig. 5, in order to adapt to the structure of the driven member, the driving arm 40 includes a main body section 42, a connecting section 43 and a mounting section 44, wherein both ends of the connecting section 43 are connected to the main body section 42 and the mounting section 44, respectively, and the main body section 42 is connected to the side surface of the belt clip 30. The mounting section 44 and the hanging plate 201 can be detachably connected in a clamping manner, a screwing manner and the like, and can be detachably connected in a welding manner, a gluing manner and the like.

Connecting segment 43 forms one section or multistage through bending, and connecting segment 43 can be bent according to driven piece's practical application occasion, not only can avoid other spare parts, can extend installation section 44 to driven piece department moreover and connect, and simultaneously, bend and can also play the reinforcing effect. The connecting section 43 may be bent to form one, two, three or more sections, and the bent section formed by bending the connecting section 43 forms a certain angle with the main body section 42 or the mounting section 44, or the bent section is inclined to the left or right, or inclined to the front or back.

In an embodiment, the connecting segment 43 extends from the end of the main segment 42 toward a direction perpendicular to the main segment 42, and the extending direction is for facilitating the mounting segment 44 to be used for connecting the driven element, and the specific extending direction can be adjusted according to actual situations. The installation section 44 and the hanging plate 201 can be detachably connected in a clamping manner, a screwing manner and the like, and can be detachably connected in a welding manner, a gluing manner and the like.

The connecting section 43 includes a first section 431 and a second section 432, the first section 431 is connected to the main body section 42, one end of the second section 432 far from the first section 431 is connected to the mounting section 44, the second section 432 is perpendicular to the mounting section 44, in order to avoid other parts, the first section 431 can be inclined towards the left or towards the right, or can be inclined towards the front or towards the back, and the included angle between the second section 432 and the mounting section 44 can be an acute angle or an obtuse angle, which can be adjusted according to actual conditions.

Referring to fig. 6 and 8, the present invention further provides an elevator door opening/closing device 1000, which includes a door motor base plate 10, a connecting assembly 200 and the synchronous belt transmission structure 100, wherein the synchronous belt 20 is disposed on the door motor base plate 10, and the connecting assembly 200 is connected to the driving arm 40 and the elevator door respectively. The connecting assembly 200 is the driven member, in this embodiment, the synchronous belt transmission structure 100 is used for transmitting the power of the driving unit 51 to drive the opening and closing of the elevator door, which refers to the car door 2000 and/or the hall door of the elevator.

The extension board 11 can be arranged on the bottom board 10 of the gantry crane, the extension board 11 is fixedly connected with the driving arm 40, and the extension board 11 plays a role in supporting and fixing the driving arm 40. The extension plate 11 and the transmission arm 40 can be detachably connected in a clamping manner, a screwing manner and the like, and can also be detachably connected in a welding manner, a gluing manner and the like.

The coupling assembly 200 includes a hanging plate 201 and a vane 202, the hanging plate 201 is coupled to the car door 2000, and the vane 202 is mounted on the hanging plate 201 to couple to the hall door. In the embodiment, an asynchronous door vane is adopted, and when the driving unit 51 drives the hanging plate 201 and the car door 2000 to move through the synchronous belt transmission structure 100, the asynchronous door vane is driven by the hanging plate 201 to move for a certain distance and then clamps the hoistway door lock wheel and drives the hoistway door to move so as to complete the operation of opening or closing the hoistway door. In this embodiment, the asynchronous knife 202 is not directly driven by the driving unit 51, but is driven by the hanging plate 201, so that the movement stability of the asynchronous knife can be improved.

Referring to fig. 7 and 10, a column pad 203 is disposed on one side of the hanging plate 201, a thread is disposed on one end of the column pad 203 close to the hanging plate 201, the column pad 203 is in threaded connection with the hanging plate 201, an internal thread is disposed inside one end of the column pad 203 far from the hanging plate 201, and a fastener penetrates through the door knife 202 and is in threaded connection with the internal thread of the column pad 203. The post pad 203 is used for fixing and supporting the door vane 202. The cylinder pad 203 may be a hexagonal cylinder, a triangular cylinder, or a quadrangular cylinder.

The elevator door opening and closing device 1000 further includes a driving assembly 50, the driving assembly 50 is disposed on the door machine base plate 10 and connected to the synchronous belt 20 for driving the synchronous belt 20 to transmit.

In one embodiment, the driving assembly 50 includes a driving unit 51 (i.e., the driving unit 51 described above), a driving pulley 54 and a driven pulley 52, the driving unit 51 includes a motor 53, the driving pulley 54 and the driven pulley 52 are disposed on the door machine base plate 10 and are respectively disposed at two ends of the synchronous belt 20, an output shaft of the motor 53 is connected to the driving pulley 54, the driving pulley 54 is directly driven to rotate by the motor 53, the structure is simple, and the components of the driving unit 51 are all mounted on the door machine base plate 10, thereby reducing the overall volume of the elevator door opening and closing device 1000.

In one embodiment, the output shaft of the motor 53 and the synchronous belt 20 are located on the same side (front side) of the door machine base plate 10, the driving pulley 54 is connected with the output shaft of the motor 53 in a synchronous motion manner, and the driving pulley 54 and the driven pulley 52 are located at the left and right ends of the front side of the door machine base plate 10. So set up, be convenient for transportation and installation, and when later maintenance, can see drive unit 51 and hold-in range 20 at a glance, be convenient for maintain.

In another embodiment, the motor 53 may be installed on the back of the door machine base plate 10 (that is, the output shaft of the motor 53 and the synchronous belt 20 are respectively installed on the back and the front of the door machine base plate 10), then the synchronous belt 20 installed on the front of the door machine base plate 10 needs to be connected to two driven wheels 52, and the wheel axle of one of the driven wheels 52 needs to be connected to the motor 53 installed on the back of the door machine base plate 10 through a transmission assembly, for example, the wheel axle of the driven wheel 52 is located at one end of the door machine base plate 10 and is fixedly connected to a driving wheel 54, and the driving wheel 54 is connected to a driving wheel installed on the output shaft of the motor 53 through a transmission belt. The motor 53 drives the driving wheel to rotate, the driving wheel 54 is connected with the driving wheel through a conveying belt, or the driving wheel 54 is connected with the driving wheel in a gear meshing manner, so that the driving wheel 54 is driven to rotate, and the axle of the driving wheel 54 is fixedly connected with the axle of the driven wheel 52, so that the driven wheel 52 is driven to rotate; alternatively, the output shaft of the motor 53 is directly connected to the wheel shaft of the driven wheel 52, thereby rotating the driven wheel 52.

The elevator door opening and closing device 1000 further includes a frequency converter 60, and the motor 53 is connected to the frequency converter 60 and controlled by the frequency converter 60. The frequency converter 60 allows the speed of the motor 53 to be steplessly adjusted by changing the voltage and frequency of the motor 53.

Preferably, the frequency converter 60 and the driving unit 51 are both disposed on the same side of the door machine base plate 10 where the synchronous belt 20 is disposed, that is, the frequency converter 60, the synchronous belt 20, the driving wheel 54, the motor 53, and the driven wheel 52 are all disposed on the same side of the door machine base plate 10 and located on the front side of the door machine base plate 10, so that the size of the elevator door opening and closing device 1000 can be reduced, transportation and installation are facilitated, and the driving unit 51 and the frequency converter 60 can be seen at a glance during later maintenance, which facilitates maintenance.

The belt clips 30 are at least two, and the at least two belt clips 30 are respectively connected to the upper and lower synchronous belts 20, it can be understood that the moving directions of the upper and lower synchronous belts 20 are different, and the at least two belt clips 30 are respectively connected to the two driven members through the two transmission arms 40, so as to drive the at least two driven members to move towards or away from each other. In particular, the car door 2000 of the elevator has two doors, and the two belt clips 30 drive the two car doors 2000 to open or close through the two hanging plates 201. Of course, when the synchronous belt drive structure 100 is applied to other applications, the number of belt clips 30 may be 3, 4, or 5 or more, which is adaptively adjusted according to actual application scenarios.

The elevator door opening and closing device 1000 further includes a door lock switch 204, and the door lock switch 204 is disposed on the door machine base plate 10 and between the two hanging plates 201. The door lock switch 204 is a double-contact switch, and when the two hanging plates 201 are driven by the driving unit 51 and the transmission arm 40 to move, the door lock switch 204 is in contact/disconnection cooperation with the two hanging plates in the moving process, so that the door lock is opened and closed. The double-contact switch can simplify the structure and is convenient to debug, and two switches do not need to be arranged.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the claims. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A synchronous belt drive structure includes a synchronous belt (20);

the synchronous belt transmission structure is characterized by further comprising a belt clip (30) and a transmission arm (40), wherein the belt clip (30) is connected to the synchronous belt (20), one end of the transmission arm (40) is rotatably connected with the belt clip (30), the other end of the transmission arm is connected with a driven piece, and the transmission arm (40) can rotate relative to the belt clip (30).

2. The synchronous belt transmission structure according to claim 1, wherein the belt clip (30) is provided with a mounting hole (31), one end of the transmission arm (40) is provided with a rotating shaft (41), and the rotating shaft (41) is inserted into the mounting hole (31) and is rotatably connected with the wall of the mounting hole (31).

3. The synchronous belt drive structure of claim 1, wherein the drive arm (40) includes a main body segment (42), a connecting segment (43), and a mounting segment (44), the connecting segment (43) being connected at both ends to the main body segment (42) and the mounting segment (44), respectively, the main body segment (42) being connected to the belt clip (30), and the mounting segment (44) being used for connecting the driven member.

4. The synchronous belt drive of claim 3, wherein the connecting segment (43) is bent and extended to form one or more segments.

5. An elevator door opening and closing device, characterized in that, it comprises a door machine bottom plate (10), a driving unit (51), a connecting assembly (200) and a synchronous belt transmission structure according to any one of claims 1-4, the driving unit (51) is arranged on the door machine bottom plate (10) and connected with the synchronous belt (20) for driving the synchronous belt (20) to transmit, the connecting assembly (200) is respectively connected with the transmission arm (40) and the elevator door; coupling assembling (200) include link plate (201) and door sword (202), link plate (201) are connected with elevator car door (2000), door sword (202) fixed mounting in on link plate (201), link plate (201) warp driving arm (40) with hold-in range (20) are connected.

6. The elevator door opening and closing device according to claim 5, wherein the driving unit (51) includes a motor (53), a driving pulley (54), and a driven pulley (52), the driving pulley (54) and the driven pulley (52) are respectively provided at both ends of the timing belt (20), and an output shaft of the motor (53) is connected to the driving pulley (54).

7. The elevator door opening and closing device according to claim 6, further comprising a frequency converter (60) electrically connected to the driving unit (51), wherein the motor (53), the driving pulley (54), the driven pulley (52), the synchronous belt (20), and the frequency converter (60) are disposed on the same side of the door motor base plate (10).

8. The elevator door opening and closing device according to claim 5, wherein an extension plate (11) is provided on the door motor base plate (10), and the extension plate (11) extends toward the actuator arm (40) and is fixedly connected to the actuator arm (40).

9. The elevator door opening and closing device according to claim 5, further comprising a door lock switch (204), wherein the door lock switch (204) is a double contact switch, and the hanging plate (201) is driven by the driving unit (51) and the synchronous belt (20) to be in contact/disconnected with the door lock switch (204) in a displacement process.

10. The elevator door opening and closing device according to claim 5, wherein a column pad (203) is disposed on one side of the hanging plate (201), an external thread is disposed on one end of the column pad (203) close to the hanging plate (201), the column pad (203) is in threaded connection with the hanging plate (201), an internal thread is disposed inside one end of the column pad (203) far away from the hanging plate (201), and a fastening member penetrates through the door vane (202) and is in threaded connection with the column pad (203).

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