Lifting device and elevator

Abstract

The utility model relates to the field of elevators, and discloses a lifting device and an elevator, a limiting mechanism is arranged in the lifting device, the limiting mechanism restrains the upper limit swing angle and the lower limit swing angle of an action part through a first blocking piece and a second blocking piece, and mechanical interference or structural deformation caused by over-travel motion is avoided. And the action of the lifting device is always in a safety threshold value. In addition, the lifting design of the first blocking piece and the second blocking piece allows the limiting position to be dynamically adjusted according to actual requirements, the adaptability to different elevator models is remarkably improved, triggering parameters are conveniently and finely adjusted in the installation or maintenance stage, and it is ensured that the action of the safety tongs is accurately matched with the elevator dynamic working condition. The elevator adopts the lifting device, so that the action of a transmission structure related to the safety tongs is more stable, an elevator safety tongs system is optimized, and the safety coefficient of the elevator is higher.

Description

Technical Field

[0001] This utility model relates to the field of elevator technology, and in particular to a lifting device and an elevator. Background Technology

[0002] The elevator safety brake system is the core protective device to prevent the car from accidentally falling or running at excessive speed. Its reliability directly depends on the precise triggering of the lifting device. The lifting device typically uses a mechanical linkage structure (such as a connecting rod or connecting plate) to convert the overspeed signal from the elevator speed governor into the clamping force of the safety brake, thereby braking the car in an emergency.

[0003] Currently, various lifting device structures have been disclosed in the prior art, such as the "Elevator Safety Gear Lifting Device" proposed in patent CN204369360U. This solution achieves force transmission through the hinged linkage of the first and second connecting plates, but the swing angle of the first and second connecting plates lacks an effective limiting design. Excessive swing of the connecting plates can easily lead to collisions with fixed components (such as guide rails and cables) in the shaft, resulting in structural deformation or breakage; uncontrolled swing angle may cause the safety gear to trigger prematurely (false alarm emergency stop) or delay in triggering (braking lag), reducing system reliability; in addition, repeated excessive swing of the hinge point can easily bear abnormal stress, leading to wear of the pin shaft and increased clearance, further exacerbating the risk of action deviation. Utility Model Content

[0004] In view of this, the present invention proposes a lifting device and an elevator, the purpose of which is to provide travel limit for the action on the lifting device, so as to improve the working reliability of the lifting device.

[0005] The solution provided by the first aspect of this utility model includes:

[0006] A lifting device, comprising:

[0007] A first rotating shaft, on which a first lifting arm is provided, and the first lifting arm is connected to a first lifting link for triggering the safety clamp to clamp the elevator guide rail;

[0008] The second rotating shaft is arranged parallel to the first rotating shaft, and the second rotating shaft is provided with a second lifting arm. The second lifting arm is connected to a second lifting link for triggering the safety clamp to clamp the elevator guide rail.

[0009] A linkage mechanism is provided, which is connected to the first rotating shaft and the second rotating shaft so that the two rotating shafts rotate in opposite directions;

[0010] A spring-loaded assembly provides an initial preload to the first and second rotating shafts to keep the safety clamp released from the elevator guide rails;

[0011] A lifting arm, which is connected to a first rotating shaft or a second rotating shaft, and is also connected to a speed limiter wire rope;

[0012] The limiting mechanism includes a frame component, a first blocking component, and a second blocking component. The first blocking component and the second blocking component can be vertically and flexibly disposed on the frame component. The first blocking component and the second blocking component are respectively disposed on the upper and lower sides of the lifting arm, or respectively disposed on the upper and lower sides of the second lifting arm, or respectively disposed on the upper and lower sides of the lifting arm.

[0013] As a further optional solution, the structural component is the upper beam of the elevator car frame or a bracket set on the upper beam, and the first blocking member and the second blocking member are threadedly connected to the structural component.

[0014] As a further optional solution, two first nuts are fixedly provided on the structural component;

[0015] Both the first and second blocking components are bolts, and the first and second blocking components are respectively threadedly connected to two first nuts.

[0016] As a further optional solution, the first blocking member and the second blocking member are respectively threaded with a second nut.

[0017] As a further optional solution, the linkage mechanism includes a linkage rod, the two ends of which are respectively hinged to the first lifting arm and the second lifting arm;

[0018] The elastic component includes a base, a spring, a pressure plate, and a locking nut. The base is fixed in position and the linkage rod passes through the base. The spring is sleeved on the linkage rod, and the first end of the spring abuts against the base. The locking nut is threaded onto the linkage rod, and the locking nut presses the pressure plate against the second end of the spring.

[0019] As a further optional solution, the linkage rod includes a first connecting rod, a second connecting rod, and a connecting stud, wherein the first connecting rod and the second connecting rod are respectively threaded to both ends of the connecting stud.

[0020] As a further optional solution, a safety switch is also included, wherein a trigger is provided on the first or second rotating shaft, and the safety switch is located on the rotation path of the trigger.

[0021] Compared with existing technologies, this lifting device has at least the following advantages:

[0022] The lifting device incorporates a limiting mechanism that constrains the upper and lower limit swing angles of the first / second lifting arm / lifting arm via a first and second blocking component. This prevents mechanical interference or structural deformation caused by overtravel, ensuring that the lifting device's operation remains within safe thresholds. Furthermore, the liftable design of the first and second blocking components allows for dynamic adjustment of the limiting positions based on actual needs (such as the clamping stroke of different safety clamp models and guide rail spacing), significantly improving adaptability to different elevator models. It also facilitates fine-tuning of trigger parameters (such as clamping force threshold and action response time) during installation or maintenance, ensuring precise matching between the safety clamp's action and the elevator's dynamic operating conditions.

[0023] The solution provided by the second aspect of this utility model includes:

[0024] An elevator comprising any of the above-mentioned lifting devices.

[0025] As a further optional solution, an upper beam is also included, which comprises two opposing first C-shaped sheet metal sections;

[0026] The first rotating shaft, the second rotating shaft, the linkage mechanism, and the elastic component on the lifting device are all arranged between two first C-shaped sheet metals; one end of the first rotating shaft passes through one of the first C-shaped sheet metals and is connected to the lifting arm.

[0027] As a further optional solution, it also includes two vertical beams, which are respectively connected to both ends of the upper beam. The vertical beams include a vertically arranged second C-shaped sheet metal.

[0028] The first lifting link and the second lifting link are respectively installed in two vertical beams. Several pressure marks are provided in the vertical beams. The pressure marks are used to press the first lifting link / second lifting link onto the inner wall of the vertical beam.

[0029] Compared with existing technologies, this elevator has at least the following advantages:

[0030] The elevator uses this lifting device, which makes the operation of the transmission structure related to the safety clamp more stable, optimizes the elevator safety clamp system, and increases the elevator's safety factor. Attached Figure Description

[0031] Figure 1 This is a front view of a lifting device according to an embodiment of the present invention;

[0032] Figure 2 This is a top view of a lifting device according to an embodiment of the present utility model;

[0033] Figure 3 This is a schematic diagram of the structure of a lifting device according to an embodiment of the present invention;

[0034] Figure 4 This is a structural schematic diagram of an elevator according to an embodiment of the present invention;

[0035] Figure 5 yes Figure 4 Enlarged view of A in the middle;

[0036] Figure 6 yes Figure 4 Enlarged view of B in the middle;

[0037] In the diagram: 100, safety clamp; 200, upper beam; 210, first C-shaped sheet metal; 300, upright beam; 310, pressure bracket;

[0038] 1. First pivot; 11. First lifting arm; 111. First lifting link;

[0039] 2. Second pivot; 21. Second lifting arm; 211. Second lifting linkage;

[0040] 3. Linkage mechanism; 31. Linkage rod; 311. First connecting rod; 312. Second connecting rod; 313. Connecting stud;

[0041] 4. Elastic component; 41. Base; 42. Spring; 43. Pressure plate; 44. Locking nut;

[0042] 5. Lifting arm;

[0043] 6. Limiting mechanism; 61. First blocking component; 62. Second blocking component; 63. First nut; 64. Second nut;

[0044] 7. Safety switch;

[0045] 8. Trigger. Detailed Implementation

[0046] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0047] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0048] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0050] refer to Figure 1-3 An embodiment of this utility model shows a lifting device, including a first rotating shaft 1, a second rotating shaft 2, a linkage mechanism 3, an elastic component 4, a lifting arm 5, and a limiting mechanism 6.

[0051] The first rotating shaft 1 is provided with a first lifting arm 11, which is connected to a first lifting link 111 for triggering the safety clamp 100 to clamp the elevator guide rail; the second rotating shaft 2 is arranged parallel to the first rotating shaft 1, and the second rotating shaft 2 is provided with a second lifting arm 21, which is connected to a second lifting link 211 for triggering the safety clamp 100 to clamp the elevator guide rail; the linkage mechanism 3 is connected to the first rotating shaft 1 and the second rotating shaft 2 so that their rotation directions are opposite; the elastic component 4 provides initial force to the first rotating shaft 1 and the second rotating shaft 2. The initial preload is used to keep the safety clamp 100 released from the elevator guide rail; the lifting arm 5 is connected to the first rotating shaft 1 or the second rotating shaft 2, and the lifting arm 5 is connected to the speed limiter wire rope; the limiting mechanism 6 includes a frame component, a first blocking component 61 and a second blocking component 62, the first blocking component 61 and the second blocking component 62 can be raised and lowered on the frame component, the first blocking component 61 and the second blocking component 62 are respectively located on the upper and lower sides of the lifting arm 5, or respectively located on the upper and lower sides of the second lifting arm 21, or respectively located on the upper and lower sides of the lifting arm 5.

[0052] Specifically, during normal elevator operation, the elastic component 4 provides initial preload to the first rotating shaft 1 and the second rotating shaft 2, ensuring that the first lifting arm 11 and the second lifting arm 21 do not trigger the safety clamp 100, i.e., keeping the safety clamp 100 released from the elevator guide rail, allowing the elevator to operate normally along the elevator guide rail. During abnormal elevator operation (e.g., overspeeding, falling, etc.), the speed limiter cable on the elevator will pull the lifting arm 5. In this embodiment, the lifting arm 5 is connected to the first rotating shaft 1, so the lifting arm 5 drives the first rotating shaft 1 to rotate, which in turn drives the first lifting arm 11 to swing upwards. The first lifting arm 11, through the linkage mechanism 3, drives the second lifting arm 21 to swing upwards. This allows the first lifting link 111 and the second lifting link 211 to move upwards, thereby triggering the safety clamps 100 located on both sides of the elevator car. In other embodiments, the lifting arm 5 can also be connected to the second rotating shaft 2, with the second lifting arm 21 driving the first lifting arm 11.

[0053] In this embodiment, the movement range of the moving parts is limited by the first blocking member 61 and the second blocking member 62 on the limiting mechanism 6. The moving parts refer to the lifting arm 5, the first lifting arm 11, and the second lifting arm 21. As can be seen from the above working process, the lifting arm 5, the first lifting arm 11, and the second lifting arm 21 move synchronously. Therefore, the first blocking member 61 and the second blocking member 62 can block only one of the moving parts to achieve synchronous limitation of the lifting arm 5, the first lifting arm 11, and the second lifting arm 21. In this embodiment, as shown... Figure 5 As shown, the first blocking member 61 and the second blocking member 62 are respectively disposed on the upper and lower sides of the lifting arm 5, thereby constraining the upper and lower limit swing angles of the first lifting arm 11 / second lifting arm 21 / lifting arm 5. In this way, mechanical interference or structural deformation caused by overtravel can be avoided, ensuring that the lifting device always operates within a safe threshold.

[0054] Furthermore, the first blocking member 61 and the second blocking member 62 are vertically and flexibly mounted on the structural member, thus allowing adjustment of their upper and lower positions. This vertically and flexibly mounted design of the first blocking member 61 and the second blocking member 62 allows for dynamic adjustment of the limit positions according to actual needs (such as the clamping stroke of different models of safety clamp 100, guide rail spacing, etc.), significantly improving adaptability to different elevator models. It also facilitates fine-tuning of trigger parameters (such as clamping force threshold and action response time) during installation or maintenance, ensuring that the action of the safety clamp 100 is precisely matched with the dynamic working conditions of the elevator.

[0055] In some embodiments, the structural member is the upper beam 200 of the elevator car frame or a bracket disposed on the upper beam 200, such as... Figure 5As shown, in this embodiment, the structural component is the upper beam 200, and the first blocking member 61 and the second blocking member 62 are movably mounted on the upper beam 200. To facilitate the lifting and lowering function of the first blocking member 61 and the second blocking member 62, the first blocking member 61 and the second blocking member 62 are threadedly connected to the structural component. In this way, the lifting and lowering adjustment of the first blocking member 61 and the second blocking member 62 can be realized, and the positions of the first blocking member 61 and the second blocking member 62 can be stabilized, thereby blocking the moving parts (first lifting arm 11 / second lifting arm 21 / lifting arm 5).

[0056] The preferred option described above, for ease of manufacturing, is as follows: Figure 5 As shown, two first nuts 63 are fixedly installed on the structural component; the first blocking member 61 and the second blocking member 62 are both bolts, and the first blocking member 61 and the second blocking member 62 are respectively threadedly connected to the two first nuts 63. In this way, the lifting function of the first blocking member 61 and the second blocking member 62 can be realized.

[0057] Furthermore, such as Figure 5 As shown, the first blocking member 61 and the second blocking member 62 are respectively threaded with a second nut 64. By tightening the second nut 64, the first blocking member 61 and the second blocking member 62 are less likely to loosen on the structural member (i.e., the upper beam 200), further ensuring the installation stability of the first blocking member 61 and the second blocking member 62.

[0058] In some embodiments, to achieve the linkage between the first lifting arm 11 and the second lifting arm 21, such as Figure 1-3 As shown, the linkage mechanism 3 includes a linkage rod 31, with its two ends hinged to the first lifting arm 11 and the second lifting arm 21, respectively. The elastic component 4 includes a base 41, a spring 42, a pressure plate 43, and a locking nut 44. The base 41 is fixed in position, and the linkage rod 31 passes through the base 41. The spring 42 is sleeved on the linkage rod 31, with its first end abutting against the base 41. The locking nut 44 is threaded onto the linkage rod 31, pressing the pressure plate 43 against the second end of the spring 42. The preload of the spring 42, i.e., the initial preload applied by the spring 42 to the linkage rod 31, can be adjusted by adjusting the position of the locking nut 44 on the linkage rod 31.

[0059] In some embodiments, such as Figure 2 As shown, the linkage 31 includes a first connecting rod 311, a second connecting rod 312, and a connecting stud 313. The first connecting rod 311 and the second connecting rod 312 are respectively threaded to both ends of the connecting stud 313. The overall length of the linkage 31 can be adjusted by rotating the connecting stud 313.

[0060] In some embodiments, such as Figure 1 and Figure 2 As shown, it also includes a safety switch 7. A trigger 8 is provided on the first rotating shaft 1 or the second rotating shaft 2, and the safety switch 7 is located on the rotation path of the trigger 8. Specifically, when the elevator operates abnormally, the speed governor wire rope triggers the lifting arm 5, causing the first rotating shaft 1 / second rotating shaft 2 to rotate, which in turn drives the trigger 8 to move. When the trigger 8 moves, it triggers the safety switch 7. After the safety switch 7 is activated, it disconnects the elevator safety circuit, thereby enabling the control system to effectively brake the elevator and provide signal feedback.

[0061] In addition, this utility model also provides an elevator, which includes the above-mentioned lifting device.

[0062] like Figure 4 and Figure 5 As shown, the elevator includes an upper beam 200, which includes two opposing first C-shaped sheet metals 210; the first rotating shaft 1, the second rotating shaft 2, the linkage mechanism 3, and the elastic component 4 on the lifting device are all arranged between the two first C-shaped sheet metals 210; one end of the first rotating shaft 1 passes through a first C-shaped sheet metal 210 and is connected to the lifting arm 5.

[0063] In this way, by placing the lifting device inside the upper beam 200, the space occupied by the lifting device above the car is reduced, and the upper beam 200 can also protect the lifting device.

[0064] In addition, such as Figure 4 and Figure 6 As shown, it also includes two vertical beams 300, which are respectively connected to the two ends of the upper beam 200. Each vertical beam 300 includes a vertically arranged second C-shaped sheet metal. The first lifting link 111 and the second lifting link 211 are respectively disposed in the two vertical beams 300. Each vertical beam 300 is provided with a plurality of pressure brackets 310, which are used to press the first lifting link 111 / second lifting link 211 onto the inner wall of the vertical beam 300.

[0065] Specifically, by placing the first lifting link 111 and the second lifting link 211 within the upright beam 300, a certain degree of protection is provided for the first lifting link 111 and the second lifting link 211; and by using the clamp 310 to limit the position of the first lifting link 111 and the second lifting link 211, the up and down movement of the first lifting link 111 and the second lifting link 211 is more stable. It should be noted that the clamp 310 does not press the first lifting link 111 and the second lifting link 211 into place; the first lifting link 111 and the second lifting link 211 can still move up and down.

[0066] In summary, this application provides a lifting device and an elevator. The lifting device includes a limiting mechanism 6, which constrains the upper and lower limit swing angles of the first lifting arm 11 / second lifting arm 21 / lifting arm 5 through the first blocking member 61 and the second blocking member 62. This avoids mechanical interference or structural deformation caused by overtravel, ensuring that the lifting device's operation is always within a safe threshold. Furthermore, the liftable design of the first blocking member 61 and the second blocking member 62 allows for dynamic adjustment of the limiting position according to actual needs (such as the clamping stroke of different safety clamp models, guide rail spacing, etc.), significantly improving adaptability to different elevator models. It also facilitates fine-tuning of trigger parameters (such as clamping force threshold and action response time) during installation or maintenance, ensuring precise matching between the safety clamp's action and the elevator's dynamic operating conditions.

[0067] The elevator uses this lifting device, which makes the operation of the transmission structure related to the safety clamp more stable, optimizes the elevator safety clamp system, and increases the elevator's safety factor.

[0068] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0069] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A lifting device, characterized in that, include: A first rotating shaft, on which a first lifting arm is provided, and the first lifting arm is connected to a first lifting link for triggering the safety clamp to clamp the elevator guide rail; The second rotating shaft is arranged parallel to the first rotating shaft, and the second rotating shaft is provided with a second lifting arm. The second lifting arm is connected to a second lifting link for triggering the safety clamp to clamp the elevator guide rail. A linkage mechanism is provided, which is connected to the first rotating shaft and the second rotating shaft so that the two rotating shafts rotate in opposite directions; A spring-loaded assembly provides an initial preload to the first and second rotating shafts to keep the safety clamp released from the elevator guide rails; A lifting arm, which is connected to a first rotating shaft or a second rotating shaft, and is also connected to a speed limiter wire rope; The limiting mechanism includes a frame component, a first blocking component, and a second blocking component. The first blocking component and the second blocking component can be vertically and flexibly disposed on the frame component. The first blocking component and the second blocking component are respectively disposed on the upper and lower sides of the lifting arm, or respectively disposed on the upper and lower sides of the second lifting arm, or respectively disposed on the upper and lower sides of the lifting arm.

2. The lifting device according to claim 1, characterized in that: The structural component is the upper beam of the elevator car frame or a bracket installed on the upper beam, and the first blocking component and the second blocking component are threadedly connected to the structural component.

3. The lifting device according to claim 2, characterized in that: Two first nuts are fixedly installed on the structural component; Both the first and second blocking components are bolts, and the first and second blocking components are respectively threadedly connected to two first nuts.

4. The lifting device according to claim 3, characterized in that: The first and second blocking members are respectively threaded with a second nut.

5. The lifting device according to claim 1, characterized in that: The linkage mechanism includes a linkage rod, the two ends of which are respectively hinged to the first lifting arm and the second lifting arm; The elastic component includes a base, a spring, a pressure plate, and a locking nut. The base is fixed in position and the linkage rod passes through the base. The spring is sleeved on the linkage rod, and the first end of the spring abuts against the base. The locking nut is threaded onto the linkage rod, and the locking nut presses the pressure plate against the second end of the spring.

6. The lifting device according to claim 5, characterized in that: The linkage rod includes a first connecting rod, a second connecting rod, and a connecting stud, wherein the first connecting rod and the second connecting rod are respectively threaded to both ends of the connecting stud.

7. The lifting device according to claim 1, characterized in that: It also includes a safety switch, wherein a trigger is provided on the first or second rotating shaft, and the safety switch is located on the rotation path of the trigger.

8. An elevator, characterized in that, Includes any one of the lifting devices according to claims 1-7.

9. The elevator according to claim 8, characterized in that: It also includes an upper beam, which comprises two opposing first C-shaped sheet metal sections; The first rotating shaft, the second rotating shaft, the linkage mechanism, and the elastic component on the lifting device are all arranged between two first C-shaped sheet metals; one end of the first rotating shaft passes through one of the first C-shaped sheet metals and is connected to the lifting arm.

10. The elevator according to claim 9, characterized in that: It also includes two vertical beams, which are respectively connected to both ends of the upper beam. The vertical beams include a vertically arranged second C-shaped sheet metal. The first lifting link and the second lifting link are respectively installed in two vertical beams. Several pressure marks are provided in the vertical beams. The pressure marks are used to press the first lifting link / second lifting link onto the inner wall of the vertical beam.

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