CN215516295U

CN215516295U - Elevator compensation chain tensioning device and elevator system

Info

Publication number: CN215516295U
Application number: CN202121392640.3U
Authority: CN
Inventors: 赵德梁; 何自立
Original assignee: Winone Elevator Co Ltd
Current assignee: Winone Elevator Co Ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2022-01-14
Anticipated expiration: 2031-06-22

Abstract

The utility model belongs to the technical field of elevators, and particularly relates to an elevator compensation chain tensioning device and an elevator system. The elevator compensation chain tensioning device comprises two guide wheels, a wheel carrier and a supporting assembly, wherein the two guide wheels are installed on the wheel carrier at intervals, the supporting assembly comprises a supporting seat and a supporting shaft, the supporting seat is installed in a pit of a well, the supporting shaft is arranged on the supporting seat and located between the two guide wheels, and the wheel carrier is supported on the supporting shaft and can rotate around the axial direction of the supporting shaft. Like this, when the power and the moment that act on two leading wheels in compensation chain both sides changed, the wheel carrier can rotate around the back shaft to the atress of balanced compensation chain both sides, so that the compensation chain that the excessive rise tight side resumes normal rising, avoid the compensation chain excessive rise, reduce the chain rupture risk of compensation chain, make the compensation chain of the side of laxing taut again simultaneously, avoid the compensation chain lax swing, provide more reliable guarantee for the safe operation of elevator.

Description

Elevator compensation chain tensioning device and elevator system

Technical Field

The utility model belongs to the technical field of elevators, and particularly relates to an elevator compensation chain tensioning device and an elevator system.

Background

In the elevator structure, as shown in fig. 1, a car 2 and a counterweight 3 are connected to both ends of a hoisting rope 1, and a trailing cable 4 is suspended from the bottom of the car. When the car 2 is in a pit, the hoisting rope 1 pulls the car 2, the weight of the hoisting rope 1 is on the side of the car 2, and the weight of the trailing cable 4 is negligible; when the car 2 is at the top floor, the counterweight 3 is at the pit, and at this time, the hoisting rope 1 pulls the counterweight 3, the weight of the hoisting rope 1 is on the counterweight 3 side, and the weight of the trailing cable 4 is on the car 2 side. As such, during the operation of the elevator, the change in the lengths of the hoist rope 1 and the trailing cable 4 causes the weight change on the car 2 side and the counterweight 3 side according to the change in the position of the car 2, and this weight change directly affects the traction condition, the braking torque, and the energy consumption of the traction machine 5. Therefore, the system balance compensation must be performed by the compensation chain 10 when the elevator hoisting height is more than 30 m.

In the related art, one end of the compensation chain 10 is suspended from the car 2, the other end is suspended from the counterweight 3, and the compensation chain 10 is tensioned by the guide wheel 20. When the elevator runs at a high speed or accelerates and decelerates, the compensation chain 10 of the elevator is in a loose state, and in the moving process, the vibration amplitude of the compensation chain 10 is too large due to the vibration and inertia of the elevator, so that other parts of an elevator shaft are scraped, the elevator is damaged, and the emergency stop is caused to cause casualties.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model mainly aims to provide an elevator compensation chain tensioning device and an elevator system, and aims to solve the technical problems that in the prior art, in the process of high-speed movement or acceleration and deceleration of an elevator, the compensation chain is loosened, so that the swing amplitude of the compensation chain is too large, and the compensation chain scrapes other parts of a hoistway, so that the elevator is damaged or is stopped emergently.

The technical scheme adopted by the utility model is as follows: the utility model provides an elevator compensation chain rises and tightly installs, includes:

the two guide wheels are used for winding the compensation chain;

the two guide wheels are arranged on the wheel frame at intervals;

the supporting assembly comprises a supporting seat and a supporting shaft arranged on the supporting seat, the supporting shaft is positioned between the two guide wheels, and the wheel carrier is supported on the supporting shaft and can rotate around the supporting shaft in the axial direction.

In some embodiments, the wheel carrier is provided with a plurality of installation positions for installing guide wheels at intervals, and the two guide wheels can be installed on any two installation positions according to the positions of a car and a counterweight of an elevator, so that the hanging point of the compensating chain and one guide wheel is positioned on the heavy vertical line of the car, and the hanging point of the compensating chain and the other guide wheel is positioned on the heavy vertical line of the counterweight.

In some embodiments, the wheel frame comprises a rectangular wheel frame side plate, the wheel frame is provided with a shaft hole with the center positioned on the symmetry line of the wheel frame side plate, the supporting shaft penetrates through the shaft hole, and the two guide wheels are symmetrically arranged at the two ends of the wheel frame side plate along the length direction relative to the symmetry line.

In some embodiments, the elevator compensating chain tensioning device further comprises an elastic compensating mechanism for keeping the compensating chain tensioned all the time, the shaft hole is a strip-shaped hole, the strip-shaped hole extends along the width direction of the side plate of the wheel carrier and is vertical to the supporting shaft, and the elastic compensating mechanism is elastically connected with the wheel carrier so as to drive the wheel carrier to move under the guiding matching of the supporting shaft and the shaft hole.

In some embodiments, the elastic compensation mechanism includes two elastic members and a supporting top plate spaced above the wheel frame and connected to the supporting base, the wheel frame further includes a wheel frame cover plate connected to the wheel frame side plate, and the two elastic members are respectively disposed at two ends of the supporting top plate along the length direction and correspondingly connected to two ends of the wheel frame cover plate.

In some embodiments, the elastic compensation mechanism includes two elastic members and two mounting seats, the two mounting seats are both located below the wheel carrier and are used for being mounted in a pit of the hoistway, the wheel carrier further includes a wheel carrier bottom plate connected with the wheel carrier side plate, and the two elastic members are respectively connected between the wheel carrier bottom plate and the two mounting seats.

In some embodiments, the elevator compensating chain tensioning device further comprises a limiting assembly, the limiting assembly comprises a limiting switch and a limiting column, a limiting protrusion is arranged on the limiting column, the limiting column is arranged beside the limiting switch, and one of the limiting switch and the limiting column is arranged on the side plate of the wheel carrier;

when the wheel carrier side plate moves to the preset position relative to the supporting shaft, the switch contact of the limit switch can be in contact with the limit bulge, so that the wheel carrier side plate is limited at the preset position.

In some embodiments, the elevator compensating chain tensioning device comprises two groups of limit components with the same structure, and two limit switches are arranged at two opposite ends of the side plate of the wheel carrier;

when the wheel frame side plate moves to a preset position relative to the supporting shaft, the switch contact of at least one limit switch is contacted with the corresponding limit bulge.

In some embodiments, the wheel carrier comprises two wheel carrier side plates which are arranged in parallel at intervals, each wheel carrier side plate is provided with a shaft hole, the support shaft penetrates through the two shaft holes, the support assembly further comprises a support shaft clamping plate for limiting the axial translation and the rotation of the support shaft, and the support shaft clamping plate is mounted on the wheel carrier side plates and clamped with the support shaft.

In some embodiments, the two guide wheels are both installed between the two wheel frame side plates, the wheel shafts of the two guide wheels are respectively connected with the two wheel frame side plates, two wheel shaft clamping plates for limiting the axial translation and rotation of the guide wheels are further arranged on the wheel frame side plates, and the two wheel shaft clamping plates are respectively clamped with the wheel shafts of the two guide wheels.

In some embodiments, two anti-dropping pads are further clamped between the two wheel frame side plates, the two anti-dropping pads are respectively located on one side of the two guide wheels, which is away from the support shaft, and the two anti-dropping pads respectively surround the wheel grooves of the corresponding guide wheels to form limiting holes for the compensation chain to pass through.

One or more technical solutions in the elevator compensation chain tensioning device provided by the embodiment of the utility model have at least one of the following technical effects: according to the elevator compensating chain tensioning device, the two guide wheels are arranged on the wheel carrier at intervals, the wheel carrier is rotatably connected with the supporting seat through the supporting shaft, and the wheel carrier can rotate around the axial direction of the supporting shaft, namely along the winding direction of the compensating chain. The compensating chain is tensioned and wound on the two guide wheels, when the two sides of the compensating chain are unbalanced in stress, for example, when an elevator runs at high speed or accelerates or decelerates, one side of the compensating chain is excessively tensioned, and the other side of the compensating chain is loosened. Therefore, excessive tensioning of the compensation chain can be avoided, the risk of chain breakage of the compensation chain is reduced, and the service life of the compensation chain is prolonged; more importantly, the compensation chain can be prevented from loosening and swinging, and the interference and the scraping of the compensation chain on other parts and structures in the elevator shaft are avoided, so that the safe operation of the elevator is ensured more reliably.

The other technical scheme of the utility model is as follows: the elevator system comprises a hoisting rope, a compensation chain, a car and a counterweight which are hung at two ends of the hoisting rope, and the elevator compensation chain tensioning device, wherein one end of the compensation chain is connected with the car, and the other end of the compensation chain is connected with the counterweight after bypassing two guide wheels.

The elevator system provided by the embodiment of the utility model has the beneficial effects that: according to the elevator system, by using the elevator compensation chain tensioning device, the compensation chain can be kept in a normal tensioning state no matter what running state the elevator is in, the situation that the compensation chain is broken due to excessive tensioning of the compensation chain, so that the overall balance of the elevator system is damaged, the situation that the elevator is damaged or stops in an emergency due to interference of peripheral parts caused by loosening of the compensation chain and the like cannot occur, the balance compensation performance of the elevator system is better, the overall service performance of the elevator system is improved, and the use safety is effectively improved.

Drawings

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

Fig. 1 is a schematic view of a structure of an elevator system in the related art;

fig. 2 is a schematic structural diagram of an elevator compensating chain tensioning device according to an embodiment of the present invention;

fig. 3 is a schematic top view of a partial structure of the tension device of the compensating chain of the elevator shown in fig. 2;

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

fig. 5 is a sectional view of a wheel frame of the tension device of the compensating chain of the elevator shown in fig. 2;

fig. 6 is a schematic structural diagram of an elevator compensating chain tensioning device according to another embodiment of the present invention;

fig. 7 is a cross-sectional view of a wheel frame of the elevator compensating chain tensioner shown in fig. 6.

In the figures, the various figures are mainly marked:

1. a hoisting rope; 2. a car; 3. a counterweight; 4. a trailing cable; 5. a traction machine; 10. a compensation chain; 20. a guide wheel; 21. a wheel axle; 22. a wheel axle clamping plate; 23. an anti-drop pad; 231. a limiting hole; 30. a wheel carrier; 31. a wheel carrier side plate; 311. a shaft hole; 312. an installation position; 32. a wheel carrier cover plate; 33. a wheel carrier base plate; 40. a support assembly; 41. a supporting seat; 42. a support shaft; 43. supporting a top plate; 431. a first connection end; 432. a second connection end; 44. supporting a shaft clamping plate; 50. a limiting component; 51. a limit switch; 52. a limiting column; 521. a limiting bulge; 60. an elastic compensation mechanism; 61. a first elastic member; 62. a second elastic member; 63. a first connecting column; 64. a second connecting column; 65. a first mounting seat; 66. a second mounting seat; 67. a first cover plate; 68. and a second cover plate.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to fig. 1 to 7 and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

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 be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

The terms "length," "width," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated based on the orientation or positional relationship shown in the drawings for simplicity of description only and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.

The terms "first" and "second" 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. The features defined as "first", "second" may explicitly or implicitly include one or more of the features and "a plurality" means two or more.

Reference in the specification to "one embodiment," "some embodiments," or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the utility model. The appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like in various places in the specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the elevator structure, as shown in fig. 1, a car 2 and a counterweight 3 are connected to both ends of a hoisting rope 1, and a trailing cable 4 is suspended from the bottom of the car 2. When the car 2 is in a pit, the hoisting rope 1 pulls the car 2, the weight of the hoisting rope 1 is on the side of the car 2, and the weight of the trailing cable 4 is negligible; when the car 2 is at the top floor, the counterweight 3 is at the pit, and at this time, the hoisting rope 1 pulls the counterweight 3, the weight of the hoisting rope 1 is on the counterweight 3 side, and the weight of the trailing cable 4 is on the car 2 side. As such, during the operation of the elevator, the change in the lengths of the hoist rope 1 and the trailing cable 4 causes the weight change on the car 2 side and the counterweight 3 side according to the change in the position of the car 2, and this weight change directly affects the traction condition, the braking torque, and the energy consumption of the traction machine 5. Therefore, the system balance compensation must be performed by the compensation chain 10 when the elevator hoisting height is more than 30 m.

In the related art, as shown in fig. 1, a guide wheel 20 is usually provided for tensioning the compensation chain 10, and when in use, one end of the compensation chain 10 is suspended from the car 2, and the other end of the compensation chain passes through the guide wheel 20 and then is suspended from the counterweight 3. However, when the elevator runs at a high speed or accelerates or decelerates, the compensating chain 10 of the elevator is in a loose state and cannot be kept tight under the influence of inertia and vibration of the car 2 or the counterweight 3, and at the moment, the loose compensating chain 10 swings to scrape other parts of the elevator shaft, so that the elevator is damaged and casualties are caused by emergency stop.

Based on this, as shown in fig. 2 to 7, an embodiment of the present invention provides an elevator compensation chain tensioning device, which is suitable for being used in an elevator system, and is used for keeping the compensation chain 10 of an elevator in an effective and reliable tensioning state all the time, preventing the compensation chain 10 from being loosened and swinging due to ineffective tensioning, and simultaneously preventing the compensation chain 10 from being broken due to excessive tensioning.

Referring to fig. 2 to 4, fig. 2 is a schematic structural view of a tension device of an elevator compensating chain according to an embodiment of the present invention, fig. 3 is a schematic top view of a wheel frame 30 of the tension device shown in fig. 2, and fig. 4 is a cross-sectional view taken along a-a line in fig. 3. The elevator compensating chain tensioning device provided by the utility model is described in detail below with reference to the accompanying drawings.

As shown in fig. 2 to 4, an embodiment of the present invention provides an elevator compensating chain tensioning device, which includes a wheel frame 30 and two guide wheels 20 mounted on the wheel frame 30 at intervals. In use, the wheel carrier 30 is used for being mounted to the bottom of a hoistway of an elevator, the compensation chain 10 is wound around the two guide wheels 20, specifically, one end of the compensation chain 10 is connected to the car 2 of the elevator, and the other end of the compensation chain is connected to the counterweight 3 after being wound around the two guide wheels 20, so that the compensation chain 10 is tightened under the combined action of the car 2, the counterweight 3 and the two guide wheels 20 by determining the mounting position of the wheel carrier 30 (see fig. 1). In this embodiment, the wheel body of the guide wheel 20 may be made of nylon, so as to reduce the friction between the compensation chain 10 and the guide wheel 20, reduce the wear of the compensation chain 10 and the guide wheel 20, and prolong the useful life of the compensation chain 10 and the guide wheel 20.

Further, the elevator compensating chain tensioning device further comprises a supporting assembly 40, the supporting assembly 40 comprises a supporting seat 41 and a supporting shaft 42, wherein the supporting seat 41 is used for being installed in a pit of an elevator shaft, so as to determine a specific position of the guide wheel 20 relative to the car 2 and the counterweight 3, the supporting shaft 42 is arranged on the supporting seat 41 and located between the two guide wheels 20, and the wheel carrier 30 is supported on the supporting shaft 42 and can axially rotate around the supporting shaft 42. Specifically, the support shaft 42 is disposed parallel to the wheel shaft 21 of the guide wheel 20, the wheel carrier 30 is provided with a shaft hole 311, and the support shaft 42 is inserted through the shaft hole 311, so that the wheel carrier 30 can rotate about the support shaft 42 under the pulling action of the compensating chain 10.

In practical use, the compensation chain 10 is tensioned under the action of the car 2, the counterweight 3 and the two guide wheels 20, and in an initial state, the two guide wheels 20 and the wheel carrier 30 are in a horizontal state, as shown in fig. 2, when the elevator runs at a high speed or is suddenly accelerated and decelerated, the compensation chain 10 is influenced by the inertia force of the counterweight 3 and the elevator car 2, the situation that the two sides are stressed differently occurs, so that one side of the compensation chain 10 is excessively tensioned, the other side is loosened, this, in turn, causes a change in the forces and moments exerted by the compensating chain 10 on the two guide wheels 20, therefore, the balance of the wheel frame 30 is broken, at this time, the compensating chain 10 on the excessively tight side pulls the guide wheel 20 connected with the compensating chain to move back to the upper side of the pit bottom of the hoistway, and correspondingly, the guide wheel 20 corresponding to the compensating chain 10 on the loose side moves downwards to the pit bottom of the hoistway, so that the whole compensating chain 10 is in a normal tight state again. Specifically, as shown in fig. 2, when the right compensation chain 10 is in an over-tensioned state and the left compensation chain 10 is in a relaxed state, the right compensation chain 10 pulls the right guide wheel 20 to move upward, so as to drive the wheel carrier 30 to rotate around the support shaft 42 along the direction indicated by the dotted arrow R2 in fig. 2, so that the tensioning amount of the right compensation chain 10 is reduced, and the left relaxed compensation chain 10 is synchronously re-tensioned when the corresponding guide wheel 20 moves downward; conversely, when the left compensation chain 10 is excessively tensioned and the right compensation chain 10 is loosened, the wheel frame 30 rotates around the supporting shaft 42 in the direction of the dotted arrow R1 in fig. 2, so that the compensation chain 10 is restored to the normal tensioned state.

In the elevator compensating chain tensioning device provided by the embodiment of the utility model, the wheel carrier 30 is rotatably connected with the supporting seat 41 through the supporting shaft 42 and can rotate around the axial direction of the supporting shaft 42, namely, along the winding direction of the compensating chain 10, when the two sides of the compensation chain 10 are unbalanced in stress, such as when the elevator runs at high speed or runs at acceleration or deceleration, one side of the compensation chain 10 is excessively tensioned, the other side is relaxed, in this way, the forces and moments acting on the two guide wheels 20 on both sides of the compensating chain 10 change, and, at this time, the wheel frame 30 rotates around the supporting shaft 42 under the pulling force of one side of the compensation chain 10, so that the guide wheel 20 on the pulled side moves upwards to restore the compensation chain 10 on the excessively tight side to a normal tight state, and the guide wheel 20 on the other side moves downwards to re-tighten the compensation chain 10 on the loose side, thereby re-keeping the whole compensation chain 10 in the normal tight state. Therefore, excessive tensioning of the compensation chain 10 can be avoided, the risk of chain breakage of the compensation chain 10 is reduced, and the service life of the compensation chain 10 is prolonged; more importantly, the compensation chain 10 can be prevented from loosening and swinging, and the compensation chain 10 is prevented from interfering and scraping other parts and structures in the elevator shaft, so that the failure rate of the elevator is reduced, and more reliable guarantee is provided for the safe operation of the elevator. And the compensation chain tensioning device of this embodiment's simple structure makes the dynamic balance design structure of elevator compacter, nimble to can help improving the stress of elevator guide shoe, improve the comfort that the passenger took the elevator.

In another embodiment of the present invention, as shown in fig. 2 and 3, the wheel frame 30 includes a wheel frame side plate 31 having a regular rectangular shape, the two guide wheels 20 are symmetrically mounted on two end portions of the wheel frame side plate 31 along the length direction, the axle hole 311 is opened on the wheel frame side plate 31, and the center of the axle hole 311 (the geometric center of the axle hole 311) is located on a symmetrical line (shown by a dotted line L in fig. 2 and 3) of the wheel frame side plate 31 along the width direction. In actual installation, one guide wheel 20 is located below the car 2, the other guide wheel 20 is located below the counterweight 3, the two guide wheels 20 are symmetrical with respect to a symmetry line of the wheel frame side plate 31, the wheel frame side plate 31 is in a horizontal state under the support of the support base 41 when the compensation chain 10 is in a normal tensioning state, and the two guide wheels 20 are located on the same horizontal straight line, so that the occupied space is small.

In the related art, when the counterweight 3 of the elevator is laterally arranged (or the counterweight 3 is disposed at the rear, and the car is too deep), for a conventional tensioning device (refer to the structure shown in fig. 1) in which a single guide wheel 20 is arranged to tension the compensation chain 10, since the distance between the hanging points of the compensation chain 10 on the guide wheel 20 cannot be freely adjusted and is affected by the bending diameter of the compensation chain 10, the hanging points of the compensation chain 10 on the guide wheel 20 deviate from the weight perpendicular line of the car 2 (the counterweight 3), so that the impact force and the friction force between the compensation chain 10 and the guide wheel 20 are increased. In this way, in order to ensure that the hanging point of the compensating chain 10 is near the plumb line of the car (or the counterweight 3), the guide wheel 20 needs to be arranged as far away from the car 2 and the counterweight 3 as possible, however, the depth of the elevator shaft is excessively increased, the civil engineering cost is increased, and the effective tensioning of the compensating chain 10 by the guide wheel 20 is influenced due to the excessively large depth.

In view of this, in an embodiment of the present invention, as shown in fig. 2 and 3, a plurality of mounting locations 312 for mounting the guide wheel 20 are spaced apart from each other on the wheel frame 30 along a hanging direction of the vertical compensation chain 10 (a direction indicated by an arrow F in fig. 2), and the plurality of mounting locations 312 are horizontally spaced apart from each other on the wheel frame side plate 31.

In actual use, the installation positions of the two guide wheels 20 are calculated according to the positions of the car 2 and the counterweight 3 of the elevator, so that the spacing distance between the two guide wheels 20 is determined, the hanging point of the compensating chain 10 and one guide wheel 20 is ensured to be positioned on the heavy vertical line of the car 2, and the hanging point of the compensating chain 10 and the other guide wheel 20 is positioned on the heavy vertical line of the counterweight 3. Thus, the two guide wheels 20 can be installed on any two installation positions 312 according to the positions of the car 2 and the counterweight 3 of the elevator, and during use, the specific installation positions can be determined according to design calculation, so that the installation depth of the guide wheels 20 can be effectively reduced, the civil engineering cost is reduced, and the manufacturing cost is reduced.

In an embodiment of the present invention, please refer to fig. 2, fig. 4 and fig. 5 together, wherein fig. 5 is a cross-sectional view of the wheel frame 30 of the tensioning device shown in fig. 2. The elevator compensation chain tensioning device further comprises an elastic compensation mechanism 60 for keeping the compensation chain 10 tensioned all the time, and the elastic compensation mechanism 60 is specifically used for re-tensioning the compensation chain 10 when the length of the compensation chain 10 changes. In the related art, as the service life of the elevator is prolonged, the length of the compensating chain 10 is lengthened, so that the compensating chain 10 is loosened, and the elastic compensating mechanism 60 is arranged to automatically correct and adjust the elongation of the compensating chain 10 when the length of the compensating chain 10 is lengthened, so that the compensating chain 10 with the lengthened length is straightened and tensioned again, and the overhauling and maintaining frequency of the compensating chain 10 is reduced.

Specifically, in the present embodiment, the axle hole 311 is a strip-shaped hole provided in the wheel frame side plate 31, the strip-shaped hole extends along the direction perpendicular to the support axle 42 and extends from one side of the wheel frame side plate 31 to the other side along the width direction, that is, the length direction of the strip-shaped hole is consistent with the hanging direction of the compensation chain 10, and the elastic compensation mechanism 60 is elastically connected to the wheel frame 30 to drive the wheel frame 30 to move under the guiding cooperation of the support axle 42 and the axle hole 311.

In practical use, when the length of the compensating chain 10 changes, the elastic compensating mechanism 60 drives the wheel carrier 30 to move towards the direction of tensioning the compensating chain 10, i.e. towards the pit bottom of the hoistway, under the guiding cooperation of the supporting shaft 42 and the shaft hole 311, so that the two guiding wheels 20 straighten and tension the lengthened compensating chain 10 again.

Therefore, the elastic compensation mechanism 60 is arranged to drive the wheel carrier 30 to move, when the length of the compensation chain 10 is lengthened, the elastic compensation mechanism 60 elastically extends or elastically contracts, so as to push or pull the wheel carrier 30 to drive the guide wheel 20 to move towards the direction of lengthening the compensation chain 10, thereby automatically correcting the tensioning amount of the compensation chain 10, re-tensioning the compensation chain 10 with the lengthened length, and avoiding accidents such as damage or sudden stop of the elevator caused by excessive swing of the compensation chain 10 due to looseness, interference and scraping with other parts and structures in the hoistway.

In some embodiments, as shown in fig. 2 and 5, the elastic compensation mechanism 60 includes two elastic members and a supporting top plate 43, the supporting top plate 43 is disposed above the wheel frame 30 at an interval and is fixedly connected to the supporting base 41, and the two elastic members are respectively disposed at two ends of the supporting top plate 43 along the length direction and are correspondingly elastically connected to two ends of the wheel frame 30. Specifically, the elastic compensation mechanism 60 includes a first elastic member 61 and a second elastic member 62 having the same structure, the supporting top plate 43 has a first connecting end 431 above one guide wheel 20 and a second connecting end 432 above the other guide wheel 20, the first elastic member 61 is elastically connected between the wheel frame 30 and the first connecting end 431, the second elastic member 62 is elastically connected between the wheel frame 30 and the second connecting end 432, and when the compensation chain 10 is normally tensioned, the elastic members are in an elastic compression state, that is, the elastic members apply a pushing force to the wheel frame side plate 31 toward the pit bottom of the hoistway.

Thus, the supporting seat 41 supports and fixes the supporting top plate 43 above the wheel frame side plate 31 away from the bottom of the hoistway pit, the supporting top plate 43 is fixed, when the compensation chain 10 is normally tensioned, the tension of the compensation chain 10 on the wheel frame side plate 31 and the thrust of the two elastic members on the wheel frame side plate 31 are in a balanced state, when the length of the compensation chain 10 is increased and is loosened, the tension of the compensation chain 10 acting on the wheel frame side plate 31 is reduced, at the moment, the elastic members elastically extend and push the wheel frame side plate 31 to move, so that the compensation chain 10 is straightened again and returns to the tensioned state.

Specifically, in the present embodiment, as shown in fig. 2 and 5, the wheel frame 30 includes two frame side plates 31 and a wheel frame cover plate 32 that are arranged in parallel at intervals, two opposite side edges of the wheel frame cover plate 32 are respectively connected with an upper side edge of the two frame side plates 31 that is away from the hoistway pit bottom, the guide wheels 20 are installed between the two frame side plates 31, and the wheel frame cover plate 32 covers the two guide wheels 20, so as to prevent external dust, impurities and the like from falling into contact with the guide wheels 20 and affecting the normal operation of the guide wheels 20.

Further, as shown in fig. 2 and 5, two connection posts are spaced apart from each other on the wheel frame cover plate 32, and two elastic members are respectively connected between the two connection posts and the top support plate 43. Specifically, the wheel frame cover plate 32 is provided with a first connecting post 63 and a second connecting post 64 which have the same structure at a position back to the two guide wheels 20, the first connecting end 431 of the supporting top plate 43 is provided with a first cover plate 67, the second connecting end 432 is provided with a second cover plate 68, the first elastic member 61 is connected between the first connecting post 63 and the first cover plate 67, and the second elastic member 62 is connected between the second connecting post 64 and the second cover plate 68.

In other embodiments, this embodiment provides another arrangement of the elastic compensation mechanism 60 as an alternative to the elastic compensation mechanism 60 of the above-described embodiments. Referring to fig. 6 and 7, in which fig. 6 is a schematic structural diagram of an elevator compensating chain tensioning device provided in this embodiment, and fig. 7 is a cross-sectional view of a wheel frame 30 of the elevator compensating chain tensioning device shown in fig. 6.

In this embodiment, as shown in fig. 6 and 7, the elastic compensation mechanism 60 includes two elastic members and two mounting seats, the two elastic members are a first elastic member 61 and a second elastic member 62 respectively, the two mounting seats are a first mounting seat 65 and a second mounting seat 66 respectively, the first mounting seat 65 and the second mounting seat 66 are both located below the wheel frame 30 and are used for being mounted in the pit of the hoistway, the first mounting seat 65 and the second mounting seat 66 are respectively disposed opposite to the two guide wheels 20, the first elastic member 61 is elastically connected between the wheel frame 30 and the first mounting seat 65, the second elastic member 62 is elastically connected between the wheel frame 30 and the second mounting seat 66, and when the compensation chain 10 is normally tensioned, the elastic members are in an elastic extension state, that is, that the elastic members apply a thrust force to the wheel frame side plate 31 away from the pit bottom of the hoistway. Thus, the first mounting seat 65 and the second mounting seat 66 are fixedly mounted at the pit bottom of the hoistway, when the compensation chain 10 is normally tensioned, the tension of the compensation chain 10 on the wheel frame side plate 31 and the thrust of the two elastic members on the wheel frame side plate 31 are in a balanced state, when the length of the compensation chain 10 is lengthened and loosened, the tension of the compensation chain 10 acting on the wheel frame side plate 31 is reduced, at the moment, the elastic members elastically contract and pull the wheel frame side plate 31 to move towards the pit bottom of the hoistway, so that the compensation chain 10 is straightened again and returns to the tensioned state.

Specifically, in the present embodiment, as shown in fig. 6 and 7, the wheel frame 30 further includes a wheel frame bottom plate 33, two opposite sides of the wheel frame bottom plate 33 are respectively connected to the lower sides of the two wheel frame side plates 31, the first mounting seat 65 is provided with a first connecting column 63, the second mounting seat 66 is provided with a second connecting column 64, the wheel frame bottom plate 33 is provided with a first cover plate 67 and a second cover plate 68, the first elastic member 61 is connected between the first connecting column 63 and the first cover plate 67, and the second elastic member 62 is connected between the second connecting column 64 and the second cover plate 68.

In the above embodiments, the elastic member may be a spring, one end of the spring is sleeved on the first connecting column 63 (the second connecting column 64), and the other end of the spring is connected to the corresponding first cover 67 (the second cover 68). It is understood that in other embodiments, the elastic member may also be an elastic rubber member, such as a polyurethane rubber member, or may also be a combination element of a rubber member and a spring, and the like, which is not limited herein.

In another embodiment of the present invention, as shown in fig. 2 and 6, the elevator compensating chain tensioning device further includes a limiting assembly 50, the limiting assembly 50 includes a limiting switch 51 and a limiting post 52, a limiting protrusion 521 is disposed on the limiting post 52, the limiting post 52 is disposed beside the limiting switch 51, the limiting protrusion 521 is in limiting fit with the limiting switch 51, and one of the limiting switch 51 and the limiting post 52 is disposed on the wheel frame side plate 31.

When the compensation chain 10 is used, the limit switch 51 is in communication connection with a control system of the elevator, when the wheel frame side plate 31 moves to a preset position relative to the support shaft 42, a switch contact of the limit switch 51 can be in contact with the limit protrusion 521, and when the control system receives the contact information, the elevator is controlled to stop, so that the wheel frame side plate 31 is limited at the preset position and cannot move continuously, and the compensation chain 10 is prevented from being broken due to excessive tensioning.

As shown in fig. 2 and 6, the elevator compensating chain tensioning device of this embodiment includes two sets of limiting assemblies 50 with the same structure, two limiting switches 51 are symmetrically disposed at two opposite ends of the wheel frame side plate 31, and two limiting posts 52 are respectively disposed beside the two limiting switches 51. Specifically, in the present embodiment, the two limit switches 51 are respectively disposed at the lower side portions of the two ends of the wheel frame side plate 31, the two limit posts 52 are respectively mounted below the wheel frame side plate 31, and the two limit protrusions 521 are respectively located at the lower side portions of the corresponding limit switches 51 departing from the wheel frame side plate 31. When the wheel frame side plate 31 moves to a preset position relative to the support shaft 42, the switch contact of at least one limit switch 51 contacts with the corresponding limit protrusion 521, so that the limit switch 51 feeds back contact information to a control system of the elevator, and the control system controls the elevator to stop.

In this embodiment, the "preset position" refers to a position where the wheel frame side plate 31 is located when the compensating chain 10 is at the limit length. In the in-service use process, along with the continuous extension of compensation chain 10 length, the structural strength of compensation chain 10 can reduce, and when compensation chain 10 extended to the ultimate length, compensation chain 10 was taken place the chain breakage very probably, consequently, set up limit switch 51 and be used for when compensation chain 10 reached the ultimate extension state, in time detected this information and feed back to the control system of elevator with it, control elevator stops the ladder to arrange the operation personnel in time to overhaul compensation chain 10, thereby avoid compensation chain 10 chain breakage.

It will be appreciated that in a particular use, the above-described "the compensation chain 10 is at the limit length" often occurs in two cases:

one situation is that when the compensating chain 10 is blocked during operation, which causes one side of the compensating chain 10 to be excessively stressed and excessively tensioned, the compensating chain 10 on the excessively tensioned side may reach a limit length only by the degree of tensioning, and at this time, the excessively tensioned side of the compensating chain 10 pulls the wheel frame side plate 31 to move upward, so that the wheel frame side plate 31 rotates around the support shaft 42, and thus the other end of the wheel frame side plate 31 and the limit switch 51 installed at the end move downward, and when the limit switch 51 moves to contact with the corresponding limit protrusion 521, the control system of the elevator controls the elevator to stop, thereby preventing the compensating chain from being broken due to excessive tensioning.

In another case, when the length of the compensating chain 10 is gradually increased to reach the limit length along with the long-term use of the compensating chain 10, in this case, the wheel frame side plates 31 are moved to the limit switches 51 at both sides by the pushing or pulling force of the elastic compensating mechanism 60 to contact the limit protrusions 521 of the corresponding limit posts 52 when the compensating chain 10 reaches the limit length, so that the control system of the elevator obtains the contact information and controls the elevator to stop, thereby preventing the compensating chain 10 from being broken due to the structural fatigue reaching the limit length. In this case, when the compensating chain 10 only moves the wheel frame side plate 31 downward due to the length change, but the wheel frame side plate 31 does not move downward to the preset position corresponding to the compensating chain 10 reaching the limit length, the limit switch 51 does not contact the limit protrusion 521, so that the limit is not formed, and the information for controlling the emergency stop of the elevator is not fed back to the control system of the elevator, in which case the elevator is not affected by the length change of the compensating chain 10 and can continue to operate normally.

In another embodiment of the present invention, as shown in fig. 5 and 6, the two wheel frame side plates 31 are respectively provided with a shaft hole 311, the two shaft holes 311 are oppositely disposed, the two opposite end portions of the support shaft 42 respectively penetrate through the two shaft holes 311, the support assembly 40 further includes a support shaft clamping plate 44, the support shaft clamping plate 44 is mounted on the wheel frame side plates 31, the support shaft clamping plate 44 is provided with a clamping groove, and the support shaft 42 is correspondingly clamped in the clamping groove clamped by the support shaft 42, so as to limit the axial translation of the support shaft 42 and the rotation of the support shaft 42, without affecting the rotation of the wheel frame side plates 31 relative to the support shaft 42.

Further, in the present embodiment, the support shaft clamping plate 44 is slidably connected to the wheel frame side plate 31, so that when the wheel frame side plate 31 moves up and down relative to the support shaft 42, the support shaft clamping plate 44 can move along with the support shaft 42, thereby ensuring that the arrangement of the support shaft clamping plate 44 does not affect the movement of the support shaft 42 along the bar-shaped shaft hole 311.

In another embodiment of the present invention, the two guide wheels 20 are mounted between the two wheel frame side plates 31, and the wheel shafts 21 of the two guide wheels 20 are respectively connected to the two wheel frame side plates 31, as shown in fig. 5 and 7. The wheel frame side plate 31 is further provided with two axle clamping plates 22, as shown in fig. 2, 3 and 6, the two axle clamping plates 22 are respectively clamped with the axles 21 of the two guide wheels 20, so as to limit the axial translation and rotation of the two guide wheels 20.

In another embodiment of the present invention, as shown in fig. 2, 3 and 6, two anti-dropping pads 23 are further interposed between the two frame side plates 31, the two anti-dropping pads 23 are respectively located on one side of the two guide wheels 20 away from the support shaft 42, and the two anti-dropping pads 23 are respectively disposed near the rim of the guide wheel 20 adjacent to the two anti-dropping pads 23, so that the two anti-dropping pads 23 respectively surround the corresponding wheel groove of the guide wheel 20 to form a limiting hole 231, the limiting hole 231 is used for the compensation chain 10 to pass through, and the limiting hole 231 can limit the compensation chain 10 in the wheel groove of the guide wheel 20, thereby preventing the compensation chain 10 from dropping off the guide wheel 20.

Another embodiment of the present invention further provides an elevator system, which includes a hoisting rope 1, a compensation chain 10, a car 2 and a counterweight 3 (as shown in fig. 1) suspended at two ends of the hoisting rope 1, and the above-mentioned elevator compensation chain tensioning device, wherein one end of the compensation chain 10 is connected to the car 2, the other end of the compensation chain 10 sequentially bypasses the two guide wheels 20 and then is connected to the counterweight 3, and the support shaft 42 is located between the car 2 and the counterweight 3.

The elevator system that this embodiment provided, through using the elevator compensation chain tensioning device of above-mentioned each embodiment, no matter under what kind of running condition of elevator (at the uniform velocity, under high speed or acceleration and deceleration running condition), its compensation chain 10 homoenergetic keeps normal tight state, neither can appear leading to compensation chain 10 broken chain because of compensation chain 10 rises and tightly excessively, thereby destroy elevator system's whole equilibrium, also can not appear compensation chain 10 because of lax and interfere peripheral part, lead to the condition such as elevator damage or urgent ladder stop, elevator system's balanced compensation performance is better, elevator system's whole performance can be improved, the safety in utilization can effectively be promoted.

It can be understood that the elevator system also has other technical effects of the elevator compensating chain tensioning device provided by the above embodiments, and the details are not described herein.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an elevator compensation chain rises and tightly installs which characterized in that includes:

the two guide wheels are used for winding the compensation chain;

the two guide wheels are arranged on the wheel frame at intervals;

2. The elevator compensating chain tensioning device according to claim 1, wherein the wheel frame is provided with a plurality of mounting positions for mounting the guide wheels at intervals, and the two guide wheels can be mounted on any two mounting positions according to the positions of a car and a counterweight of an elevator, so that the hanging point of the compensating chain and one guide wheel is positioned on a heavy vertical line of the car, and the hanging point of the compensating chain and the other guide wheel is positioned on a heavy vertical line of the counterweight.

3. The elevator compensating chain tensioning device according to claim 1, wherein the wheel frame comprises a rectangular wheel frame side plate, the wheel frame is provided with a shaft hole with a center located on a symmetry line of the wheel frame side plate, the supporting shaft penetrates through the shaft hole, and the two guide wheels are symmetrically mounted at two ends of the wheel frame side plate along the length direction relative to the symmetry line.

4. The elevator compensating chain tensioning device according to claim 3, further comprising an elastic compensating mechanism for keeping the compensating chain tensioned all the time, wherein the shaft hole is a bar-shaped hole extending along the width direction of the side plate of the wheel carrier and perpendicular to the supporting shaft, and the elastic compensating mechanism is elastically connected to the wheel carrier to drive the wheel carrier to move under the guiding cooperation of the supporting shaft and the shaft hole.

5. The elevator compensation chain tensioning device according to claim 4, wherein the elastic compensation mechanism comprises two elastic members and a support top plate arranged above the wheel carrier at intervals and connected with the support base, the wheel carrier further comprises a wheel carrier cover plate connected with the wheel carrier side plate, and the two elastic members are respectively arranged at two end portions of the support top plate along the length direction and correspondingly connected with two end portions of the wheel carrier cover plate.

6. The elevator compensating chain tensioning device according to claim 4, wherein the elastic compensating mechanism comprises two elastic members and two mounting seats, the two mounting seats are both located below the wheel carrier and are used for being mounted in a pit of a hoistway, the wheel carrier further comprises a wheel carrier bottom plate connected with the wheel carrier side plate, and the two elastic members are respectively connected between the wheel carrier bottom plate and the two mounting seats.

7. The elevator compensating chain tensioning device according to any one of claims 3 to 6, further comprising a limiting component, wherein the limiting component comprises a limiting switch and a limiting post, a limiting protrusion is arranged on the limiting post, the limiting post is arranged beside the limiting switch, and one of the limiting switch and the limiting post is arranged on the wheel carrier side plate;

when the wheel carrier side plate moves to a preset position relative to the supporting shaft, the switch contact of the limit switch can be in contact with the limit bulge, so that the wheel carrier side plate is limited at the preset position.

8. The elevator compensating chain tensioning device according to claim 7, wherein the elevator compensating chain tensioning device comprises two sets of limiting assemblies with the same structure, and the two limiting switches are arranged at two opposite ends of the side plate of the wheel carrier;

when the wheel frame side plate moves to the preset position relative to the supporting shaft, the switch contact of at least one limit switch is in contact with the corresponding limit bulge.

9. The elevator compensating chain tensioning device according to any one of claims 3 to 6, wherein the wheel carrier comprises two wheel carrier side plates which are arranged in parallel at intervals, the two wheel carrier side plates are respectively provided with the shaft hole, the supporting shaft penetrates through the two shaft holes, the supporting assembly further comprises a supporting shaft clamping plate which is used for limiting the axial translation and rotation of the supporting shaft, and the supporting shaft clamping plate is mounted on the wheel carrier side plates and clamped with the supporting shaft.

10. The elevator compensating chain tensioning device according to claim 9, wherein the two guide wheels are both mounted between the two wheel carrier side plates, wheel shafts of the two guide wheels are respectively connected with the two wheel carrier side plates, two wheel shaft clamping plates for limiting axial translation and rotation of the guide wheels are further arranged on the wheel carrier side plates, and the two wheel shaft clamping plates are correspondingly clamped with the wheel shafts of the two guide wheels.

11. The elevator compensating chain tensioning device according to claim 9, wherein two anti-dropping pads are further clamped between the two wheel carrier side plates, the two anti-dropping pads are respectively located on one sides of the two guide wheels, which are away from the supporting shaft, and the two anti-dropping pads are respectively surrounded with the corresponding wheel grooves of the guide wheels to form limiting holes for the compensating chain to pass through.

12. An elevator system, comprising a hoisting rope, a compensation chain, a car and a counterweight suspended at two ends of the hoisting rope, and the elevator compensation chain tensioning device of any one of claims 1 to 11, wherein one end of the compensation chain is connected with the car, and the other end of the compensation chain is connected with the counterweight after bypassing the two guide wheels.