Elevator hoisting rope head tension automatic balancing device
The automatic tension balancing device at the elevator traction rope head utilizes a multi-stage balance beam and tension adjustment mechanism to achieve tension balance between traction ropes, solving the problem that traditional devices cannot balance tension, improving the service life of traction ropes and traction sheaves, and providing safety protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING PINZHI CONSTR ENG QUALITY INSPECTION CO LTD
- Filing Date
- 2025-06-23
- Publication Date
- 2026-06-02
AI Technical Summary
Traditional traction rope end devices cannot achieve tension balance between traction ropes, resulting in uneven wear of the traction sheave and traction ropes, reducing service life and incurring high replacement costs.
An automatic tension balancing device for elevator traction rope ends is adopted, including a rope end support hinge seat, a multi-stage balance beam and a rope end device base. The tension between traction ropes is automatically balanced through the multi-stage balance beam and balance fulcrum. The device is combined with a tension adjustment mechanism and a bolt preload sensor for real-time monitoring and protection.
It achieves tension balance between traction ropes, extends the service life of traction ropes and traction sheaves, reduces replacement frequency and cost, and provides protection against rope breakage, uneven tension, and overload.
Smart Images
Figure CN224313036U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of elevator equipment technology, specifically an automatic tension balancing device for elevator traction rope ends. Background Technology
[0002] The drive mechanism of a traction elevator is the traction machine. The traction machine drives the traction ropes by the friction between the traction sheave grooves and the wire ropes. The traction sheave has multiple grooves, and each groove holds one traction rope. The suspended loads of the elevator car, counterweight, and passenger load are borne by all the traction ropes. However, each wire rope bears the load independently. The stress level of each traction rope is determined after installation and commissioning. Traditional traction rope end devices can only adjust the tension of each individual traction rope and do not balance the tension between the traction ropes, thus failing to guarantee balanced tension among the traction ropes during elevator use. GB / T7588.1 "Safety Code for Elevator Manufacturing and Installation Part 1 Passenger Elevators and Load Elevators" 5.5.5.1 requires an automatic adjustment device to be installed at least at one end of the suspended wire rope or chain to balance the tension of each rope or chain. Therefore, traditional rope end devices cannot meet the standard requirements.
[0003] The hazards of uneven tension between traction ropes include: (1) Uneven tension in the traction ropes will cause accelerated uneven wear of the traction sheave grooves, reducing the service life of the traction sheave and resulting in waste. (2) Uneven tension in the traction ropes will cause accelerated wear of the traction ropes, reducing the service life of the traction ropes and resulting in waste. (3) The cost of replacing the traction sheave or traction rope is not to be underestimated, because the traction rope is replaced as a whole, not just one of the traction ropes. For example, for an elevator with a 100m lifting height, a 2:1 traction ratio, and 6 traction ropes, about 2400m of steel wire rope is needed. Replacing the traction sheave or traction rope is time-consuming and laborious, and it also affects passengers' use of the elevator. Therefore, ensuring the tension balance between the traction ropes is the key factor in improving the service life of the traction sheave or traction rope, but the existing traction rope end device does not have the function of tension balancing. Utility Model Content
[0004] In view of this, the purpose of this utility model is to provide an automatic tension balancing device for elevator traction rope ends to solve the problems in the background art.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] This utility model discloses an automatic tension balancing device for elevator traction rope ends, comprising, from top to bottom, a rope end support hinge seat, a multi-stage balancing beam, and a rope end device base; each balancing beam includes three balancing fulcrums; the rope end support hinge seat is fixedly connected to the traction rope end; the balancing fulcrums on both sides of the first-stage balancing beam are respectively hinged to the two rope end support hinge seats, the balancing fulcrum at the middle position of the subsequent-stage balancing beam is hinged to one side of the balancing fulcrum of the previous-stage balancing beam, and the last-stage balancing beam is hinged to the rope end device base; both the multi-stage balancing beam and the rope end device base are provided with through holes, and the traction rope passes through the through holes of the multi-stage balancing beam and the rope end device base.
[0007] In one embodiment of this application, the tension automatic balancing device includes two rows of rope head support hinge seats; the multi-stage balancing beam includes a longitudinal balancing beam and a transverse balancing beam, the longitudinal balancing beam is provided with three balancing support points on the front and rear sides respectively, and the transverse balancing beam is provided with three balancing support points on the left and right sides respectively; the side beam used to connect the longitudinal balancing beam and the transverse balancing beam is provided with balancing support points on both sides and the front and rear sides.
[0008] The balance supports on the front and rear sides of the side beam are respectively hinged to the balance supports at the middle positions of the front and rear sides of the upper longitudinal balance beam, and the balance supports on the left and right sides of the side beam are respectively hinged to the balance supports on one side of the left and right sides of the lower transverse balance beam.
[0009] In one embodiment of this application, the balancing fulcrum is a circular hole or a cylinder, and different balancing beams are hinged by inserting the cylinder into the circular hole.
[0010] In one embodiment of this application, gaps are provided between adjacent balance beams and between the last balance beam and the base of the rope head device to provide space for the balance beam to rotate.
[0011] In one embodiment of this application, a tension adjusting mechanism is further included, the tension adjusting mechanism including a tension adjusting nut located above the rope end support hinge seat, and a compression spring located between the tension adjusting nut and the rope end support hinge seat;
[0012] The tension adjusting nut engages with the threaded part on the traction rope, and the compression spring is sleeved on the traction rope.
[0013] In one embodiment of this application, the multi-level balance beam includes a three-level longitudinal balance beam, a one-level side beam, and a one-level transverse balance beam.
[0014] In one embodiment of this application, a bolt preload sensor for monitoring rope tension is provided between the rope end hinge support and the compression spring.
[0015] The beneficial effects of this utility model are as follows: This utility model provides an automatic tension balancing device for elevator traction rope ends. Multiple traction rope ends are fixed within the automatic tension balancing device, which balances the tension of these ends. The automatic tension balancing device includes, from top to bottom, rope end support hinge seats, multi-stage balance beams, and a rope end device base. Each balance beam includes three balance points. The rope end support hinge seats are fixedly connected to the traction rope ends. The balance points on both sides of the first-stage balance beam are hinged to the two rope end support hinge seats respectively. The balance point in the middle of the subsequent-stage balance beam is hinged to one side of the balance point of the previous-stage balance beam. The last-stage balance beam is hinged to the rope end device base. This application utilizes multi-stage balance beams and balance points to balance the tension of multiple traction rope ends, ensuring that the tension difference between the traction ropes is controlled within an acceptable range in real time during elevator use, which helps to improve the service life of the traction ropes and traction sheaves. Attached Figure Description
[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0017] Figure 1 This is a structural diagram of an automatic tension balancing device for elevator traction rope ends, shown in one embodiment of this application.
[0018] Figure 2 This is an exploded view of an automatic tension balancing device for elevator traction rope ends according to an embodiment of this application.
[0019] Figure 3 This is a schematic diagram illustrating the balancing principle of the balance beam in one embodiment of this application;
[0020] Figure 4 This is a schematic diagram illustrating the balancing principle of a multi-stage balancing beam in one embodiment of this application;
[0021] Figure 5 This is a schematic diagram of the balance beam configuration structure when the number of traction ropes in this application is 4.
[0022] Figure 6 This is a schematic diagram of the balance beam configuration structure when the number of traction ropes in this application is 5;
[0023] Figure 7 This is a schematic diagram of the balance beam configuration structure when the number of traction ropes in this application is 6;
[0024] Figure 8 This is a schematic diagram of the balance beam configuration structure when the number of traction ropes in this application is 7;
[0025] Figure 9 This is a schematic diagram of the balance beam configuration structure when the number of traction ropes in this application is 8;
[0026] Figure 10 This is a schematic diagram of the balance beam configuration structure when the number of traction ropes in this application is 9;
[0027] Figure 11 This is a schematic diagram of the balance beam configuration structure when the number of traction ropes in this application is 10;
[0028] Figure 12 This is a schematic diagram of the balance beam configuration structure when the number of traction ropes in this application is 11.
[0029] Figure 13 This is a schematic diagram of the balance beam configuration structure when the number of traction ropes in this application is 12.
[0030] Figure 14 This is a schematic diagram of the balance beam configuration structure when the number of traction ropes in this application is 13.
[0031] Figure 15 This is a schematic diagram of the balance beam configuration structure when the number of traction ropes in this application is 14.
[0032] Figure 16 This is a schematic diagram of the balance beam configuration structure when the number of traction ropes in this application is 15.
[0033] Figure 17 This is a schematic diagram of the balance beam configuration structure when the number of traction ropes in this application is 16.
[0034] 1- Rope end support hinge seat;
[0035] 2-Balance beam, 21-Longitudinal balance beam, 22-Side beam, 23-Transverse balance beam, 24-Balance support point;
[0036] 3- Rope end device base;
[0037] 4-Tension adjusting screw;
[0038] 5-Compression spring. Detailed Implementation
[0039] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.
[0040] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the layers related to the present invention and are not drawn according to the actual number, shape and size of the layers in the actual implementation. In the actual implementation, the form, number and proportion of each layer can be arbitrarily changed, and the layer layout may also be more complex.
[0041] Numerous details are explored in the following description to provide a more thorough explanation of embodiments of the present invention; however, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details.
[0042] Figure 1 This is a structural diagram of an automatic tension balancing device for elevator traction rope ends, as shown in one embodiment of this application. Figure 1 As shown, an automatic tension balancing device according to this embodiment includes:
[0043] The structure consists of a rope head support hinge 1, a multi-stage balance beam 2, and a rope head device base 3, arranged from top to bottom. Each balance beam 2 includes three balance points 24. The rope head support hinge 1 is fixedly connected to the end of the traction rope. The balance points 24 on both sides of the first-stage balance beam 2 are hinged to the two rope head support hinge 1 respectively. The balance point 24 in the middle of the next-stage balance beam 2 is hinged to one side of the balance point 24 of the previous-stage balance beam 2. The last-stage balance beam 2 is hinged to the rope head device base 3. Both the multi-stage balance beam 2 and the rope head device base 3 are provided with through holes, through which the traction rope passes.
[0044] Figure 2 This is an exploded view of an automatic tension balancing device for elevator traction rope ends according to an embodiment of this application, as shown below. Figure 2 As shown, the tension automatic balancing device includes two rows of rope head support hinge seats 1; the multi-stage balancing beam 2 includes a longitudinal balancing beam 21 and a transverse balancing beam 23, with three balancing support points 24 on the front and rear sides of the longitudinal balancing beam 21, and three balancing support points 24 on the left and right sides of the transverse balancing beam 23; the side beam 22 used to connect the longitudinal balancing beam 21 and the transverse balancing beam 23 is provided with balancing support points 24 on both sides and the front and rear sides.
[0045] Specifically, the multi-stage balancing beam 2 includes a three-stage longitudinal balancing beam 211, a first-stage side beam 22, and a first-stage transverse balancing beam 233. The hinge axes of the longitudinal balancing beam 211 and the transverse balancing beam 233 are perpendicular, and they are used to automatically balance the unbalanced stress in the longitudinal direction and the unbalanced stress in the transverse direction, respectively.
[0046] The balance support points 24 on the front and rear sides of the side beam 22 are respectively hinged to the balance support points 24 at the middle position of the front and rear sides of the upper longitudinal balance beam 211, and the balance support points 24 on the left and right sides of the side beam 22 are respectively hinged to the balance support points 24 on one side of the left and right sides of the lower transverse balance beam 23.
[0047] In this embodiment, the balancing fulcrum 24 is a circular hole or a cylinder, and different balancing beams 2 are hinged by inserting a cylinder into the circular hole. Specifically, the balancing fulcrum 24 located in the middle position is a circular hole, and the balancing fulcrum 24 located at the edge position is a cylinder, thereby realizing hierarchical connection.
[0048] Figure 3 This is a schematic diagram illustrating the balancing principle of the balance beam in one embodiment of this application. Figure 4 This is a schematic diagram of the balancing principle of a multi-stage balancing beam in one embodiment of this application, as shown below. Figures 3-4 As shown, the balance beam is subjected to two loads F1 and F2 and a support force F. The balance beam can rotate about the fulcrum. The three forces on the balance beam are a planar parallel force system in any state.
[0049] The equilibrium condition for a balanced beam is: F1 = F2, where F = F1 + F2. When F1 ≠ F2, the equilibrium is broken, and the beam will rotate around the fulcrum. As shown in the diagram, if F1 > F2, the beam will rotate counterclockwise. During this rotation, F1 gradually relaxes and decreases, while F2 gradually tightens and increases, until F1 = F2 again, maintaining equilibrium. Therefore, the beam can automatically balance the loads at both ends. The same logic applies when F2 > F1.
[0050] The equilibrium condition for a non-equally divided equilibrium beam is: F = F1 + F2;
[0051] The magnitudes of F1 and F2 are inversely proportional to the distances L1 and L2 from the point of application to the intermediate hinge point: F1 / F2 = L2 / L1.
[0052] Depend on Figure 4 As can be seen, in this application, the number of multi-stage balance beams and the structure are determined based on the number of traction ropes. Figures 5-17 This is a schematic diagram of the balance beam configuration structure when the number of traction ropes in this application ranges from 4 to 16. Please refer to... Figures 5-17 Please refer to the table below for further understanding. The table below shows the configuration of the balance beam based on the number of traction ropes (P) during specific implementation:
[0053] Traction quantity (P) and balance beam configuration table
[0054]
[0055] In addition, gaps are provided between adjacent balance beams and between the last-stage balance beam and the rope head device base to provide space for the balance beams to rotate. These gaps ensure that each balance beam can rotate freely to achieve automatic load balancing; the size of the gaps also limits the rotation angle to prevent it from becoming too large. This ensures that even if the balance is disrupted unexpectedly (such as if one traction rope breaks or elongates, causing the load to disappear or decrease), the balance beam can still support the load transmitted by the remaining traction ropes. As long as tension exists in at least one traction rope, there will be no danger of the car or counterweight suspension failing and falling. To keep the balance beams in a state of automatic balance in real time, it is only necessary to adjust the load at both ends of the balance beam to control its rotation range, ensuring that the bottom of the balance beam does not contact other balance beams, transverse balance beams, or the base; it is not necessary to maintain a constantly horizontal state.
[0056] In addition, a tension adjustment mechanism is included, comprising a tension adjustment nut 4 located above the rope end support hinge seat, and a compression spring 5 located between the tension adjustment nut 4 and the rope end support hinge seat. The tension adjustment nut 4 engages with a threaded connection on the traction rope, and the compression spring 5 is fitted onto the traction rope. When the tension adjustment nut 4 is rotated to further compress the spring, the spring's attempt to return to its original shape increases, which increases its tension on the traction rope, thereby increasing the tension of the traction rope. Conversely, if the tension adjustment nut 4 is loosened to allow the spring to slightly spring back, the spring's tension on the traction rope decreases, reducing the tension of the traction rope.
[0057] In one embodiment of this application, a bolt preload sensor for monitoring rope tension is provided between the rope end hinge support and the compression spring. Based on the bolt preload sensor, this application can also implement various protection mechanisms, specifically including:
[0058] (1) Assume the number of traction ropes in the elevator traction system is... Automatic tension balancing devices are installed on both the counterweight side and the car side of the elevator, and the measured tension of each rope end on the counterweight side is obtained. And obtain the measured tension of each rope end on the car side. ,in, Number the ends of the rope;
[0059] (2) The measured tension of each rope end on the car side When the overload judgment condition is met, overload protection is triggered. The mathematical expression for the overload judgment condition is:
[0060]
[0061] In the formula, Number of rope ends This represents the theoretical tension of each rope end on the car side under rated load;
[0062] (3) The measured tension of each rope end on the car side and the measured tension of each rope end on the weighted side. When the uneven tension judgment condition is met, the uneven tension protection is triggered. The uneven tension judgment condition is one of the following mathematical expressions:
[0063]
[0064]
[0065]
[0066]
[0067] (4) The measured tension of each rope end on the car side and the measured tension of each rope end on the weighted side. The rope breakage protection is triggered when the rope breakage criteria are met. The rope breakage criteria are as follows: or .
[0068] (5) When the overload protection is triggered, a stop command is issued for the elevator, and operation is resumed when the elevator load returns to the rated load;
[0069] (6) When the uneven tension protection is triggered, an elevator stop command is issued, and operation is resumed when the tension of multiple rope ends is adjusted to balance;
[0070] (7) When the rope breakage protection is triggered, the elevator stop command is issued and operation is resumed when all traction ropes are replaced and the rope tension is balanced after the traction ropes are replaced.
[0071] If any one or more of the following protection mechanisms—rope breakage protection, uneven tension protection, and overload protection—are triggered, a stop command will be issued, causing the elevator to stop automatically in a timely manner. If overload protection is triggered, the load will be reduced to within the rated load and operation will automatically resume. If uneven tension protection is triggered, the rope end device needs to be adjusted to the automatic balancing state to restore tension balance and operation. If rope breakage protection is triggered, all traction ropes must be replaced, and after replacement, the rope end device must be adjusted to the automatic balancing state to restore tension balance before operation can resume.
[0072] The automatic tension balancing device for elevator traction rope ends in this application has the following characteristics:
[0073] 1. It can automatically balance the tension between the traction ropes, so that the tension difference between the traction ropes during elevator use is controlled within an acceptable range in real time, which helps to improve the service life of the traction ropes and traction sheaves.
[0074] 2. The structure is simple and the cost is low. The balance principle is intuitive and the balance adjustment is relatively easy. As long as the bottom of each balance beam does not contact other balance beams, side beams or bases, the tension can be automatically balanced.
[0075] 3. It can provide conditions for elevators to be equipped with rope breakage protection, uneven tension protection and overload protection.
[0076] 4. After the model of the tension automatic balancing rope head device is established, in practical applications, based on the elevator parameters such as the maximum tension of the traction rope, the number of traction ropes, the spacing between traction ropes, and the diameter of the rope head adjusting screw, the structural dimensions can be modified and the strength can be verified before it can be directly applied without changing the structure.
[0077] 5. The balancing effect of the automatic tension balancing rope head device can be verified in real time by setting a bolt preload sensor.
[0078] 6. One end of the rope can be adjusted to break the balance and verify the effectiveness of the uneven tension protection.
[0079] 7. You can adjust any one of the rope ends to loosen it and verify the effectiveness of the rope breakage protection.
[0080] 8. Load tests can be conducted to verify the effectiveness and accuracy of overload protection.
[0081] 9. Theoretically, when the automatic tension balancing rope head device is in automatic balancing mode, the tension of each traction rope should be equal. However, due to unavoidable machining errors in the balancing device and rotational resistance at the hinges between the balancing beams, balancing errors are also unavoidable. Therefore, ensuring absolutely equal tension in each traction rope is very difficult. However, it is easy to control the balancing error to an acceptable level by improving machining accuracy and lubrication conditions at the hinges between the balancing beams.
[0082] In the above embodiments, although the present invention has been described in conjunction with specific embodiments thereof, many substitutions, modifications, and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. The embodiments of the present invention are intended to cover all such substitutions, modifications, and variations falling within the broad scope of the appended claims.
[0083] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.
Claims
1. An automatic tension balancing device for elevator traction rope ends, characterized in that, The system includes a rope head support hinge seat (1), a multi-stage balance beam (2), and a rope head device base, arranged from top to bottom. Each balance beam (2) includes three balance points (24). The rope head support hinge seat (1) is fixedly connected to the end of the traction rope. The balance points (24) on both sides of the first-stage balance beam (2) are hinged to the two rope head support hinge seats (1) respectively. The balance point (24) in the middle of the next-stage balance beam (2) is hinged to the balance point (24) on one side of the previous-stage balance beam (2). The last-stage balance beam (2) is hinged to the rope head device base. Both the multi-stage balance beam (2) and the rope head device base are provided with through holes, and the traction rope passes through the through holes of the multi-stage balance beam (2) and the rope head device base.
2. The automatic tension balancing device for elevator traction rope ends according to claim 1, characterized in that, The automatic tension balancing device includes two rows of rope head support hinge seats (1); the multi-stage balancing beam (2) includes a longitudinal balancing beam (21) and a transverse balancing beam (23), the longitudinal balancing beam (21) is provided with three balancing support points (24) on the front and rear sides respectively, and the transverse balancing beam (23) is provided with three balancing support points (24) on the left and right sides respectively; the side beams used to connect the longitudinal balancing beam (21) and the transverse balancing beam (23) are provided with balancing support points (24) on both sides and on the front and rear sides. The balance support points (24) on the front and rear sides of the side beam are respectively hinged to the balance support points (24) at the middle position of the front and rear sides of the upper longitudinal balance beam (21), and the balance support points (24) on the left and right sides of the side beam are respectively hinged to the balance support points (24) on one side of the left and right sides of the lower transverse balance beam (23).
3. The automatic tension balancing device for elevator traction rope ends according to claim 1, characterized in that, The balance fulcrum (24) is a circular hole or a cylinder, and different balance beams (2) are hinged by inserting the cylinder into the circular hole.
4. The automatic tension balancing device for elevator traction rope ends according to claim 1, characterized in that, There are gaps between adjacent balance beams (2) and between the last balance beam (2) and the rope head device base (3) to provide space for the balance beam to rotate.
5. The automatic tension balancing device for elevator traction rope ends according to claim 1, characterized in that, It also includes a tension adjustment mechanism, which includes a tension adjustment nut (4) located above the rope end support hinge (1) and a compression spring (5) located between the tension adjustment nut (4) and the rope end support hinge (1). The tension adjusting nut (4) is threaded onto the traction rope, and the compression spring is sleeved on the traction rope.
6. The automatic tension balancing device for elevator traction rope ends according to claim 2, characterized in that, The multi-level balance beam includes a three-level longitudinal balance beam (21), a first-level side beam (22), and a first-level transverse balance beam (23).
7. The automatic tension balancing device for elevator traction rope ends according to claim 5, characterized in that, A bolt preload sensor for monitoring rope tension is provided between the rope end hinge support and the compression spring.