Safety clamp lifting device, elevator car and use method thereof

Abstract

The present invention belongs to the field of elevators, and discloses a safety clamp lifting device, an elevator car and a method of using the same. The safety clamp lifting device includes a linkage rod, an elastic reset member, a support frame and a lifting mechanism, wherein the lifting mechanism is movably mounted on the support frame; a first adsorption member is mounted on the linkage rod, and a second adsorption member is mounted on the lifting mechanism; one end of the linkage rod close to the lifting mechanism is an adsorption end, the adsorption end is mounted with the first adsorption member, and the other end is a lifting end, and the lifting end passes through the support frame, the second adsorption member on the lifting mechanism is located between the adsorption end and the lifting end, and the first adsorption member cooperates with the second adsorption member; one end of the elastic reset member acts on the support frame and the other end acts on the linkage rod. The electromechanical hybrid drive safety clamp is realized.

Description

Technical Field

[0001] The invention belongs to the field of elevators, and in particular to a safety clamp lifting device, an elevator car and a use method thereof. Background Art

[0002] With the continuous acceleration of my country's urbanization process, more and more high-rise buildings are equipped with elevator equipment, so the safety of elevator equipment is closely related to people's lives; the traditional elevator mechanical safety clamp uses a mechanical speed limiter to implement mechanical drive from above the shaft, but this traditional method has a complex structure and requires the use of traction wire ropes for driving, which makes the system more complicated and inconvenient to install and maintain.

[0003] Electric elevator safety clamps are also gradually appearing, some of which adopt the working principle of power-driven safety action. However, it is not easy to check the safety of power-driven safety clamps. For example, the quality of power supply and whether the wires are broken directly affect the safety action. In addition, the safety clamp action should be able to achieve safe braking at any time (including power outage time) and in any state to provide safety protection for the elevator.

[0004] In addition, there are strict safety distance requirements between the lower part of the safety clamp and the bottom of the well, so it is not suitable to set too many driving mechanisms at the lower part of the safety clamp. Summary of the invention

[0005] The object of the present invention is to improve the disadvantages of the prior art and provide a safety clamp lifting device, an elevator car and a use method thereof, which can reliably drive the safety clamp.

[0006] The technical solution is as follows:

[0007] A safety clamp lifting device comprises a linkage rod, an elastic reset member, a support frame and a lifting mechanism, wherein the lifting mechanism is movably mounted on the support frame; a first adsorption member is mounted on the linkage rod, and a second adsorption member is mounted on the lifting mechanism; one end of the linkage rod close to the lifting mechanism is an adsorption end, on which the first adsorption member is mounted, and the other end is a lifting end, and the lifting end passes through the support frame, the second adsorption member on the lifting mechanism is located between the adsorption end and the lifting end, and the first adsorption member cooperates with the second adsorption member; one end of the elastic reset member acts on the support frame and the other end acts on the linkage rod.

[0008] The lifting mechanism includes a power source and a lifting member, the power source drives the lifting member, and the second adsorption member is installed on the lifting member.

[0009] When the elastic return member is in the state of compressing and storing energy, the adsorption end of the linkage rod is in the first position; when the elastic return member is in the state of releasing energy and at least partially restoring its shape, the adsorption end of the linkage rod is in the second position; the lifting member always avoids the second position during movement.

[0010] The lifting member includes a first connecting end and a second connecting end, the first connecting end is connected to the power source, and the second connecting end is connected to the second adsorption member; during the movement of the lifting member, the first connecting end and the second connecting end are always located on both sides of the second position.

[0011] The first connection end and the second connection end are connected at the edge through a plate or a rod, and a avoidance groove is provided in the middle of the second connection end, and the linkage rod passes through the avoidance groove.

[0012] The side portion between the first connection end and the second connection end is closed by a plate, and there is at least one plate connecting the first connection end and the second connection end, and at least one side is ensured to be open.

[0013] A connecting plate is provided on the adsorption end, and the first adsorption component is installed on the connecting plate; the second adsorption components are provided on both sides of the second connecting end located at the avoidance groove; the elastic reset component is a spring, and the spring is sleeved on the linkage rod, one end of the spring acts on the support frame, and the other end acts on the adsorption end of the linkage rod.

[0014] The supporting frame is provided with sliding grooves on both sides close to the lifting member, and the lifting member slides along the sliding grooves.

[0015] The power source includes a driving motor, a screw rod and a matching block. The motor is fixedly mounted on the support frame. The motor output shaft drives the screw rod to rotate. The matching block is mounted on the first connecting end. The screw rod cooperates with the matching block to drive the first connecting end to move back and forth.

[0016] The power source is a pneumatic cylinder or a hydraulic cylinder, and the telescopic rod of the pneumatic cylinder or the hydraulic cylinder acts on the first connecting end.

[0017] The first adsorption member and the second adsorption member are electromagnets or magnetic adsorption members, and at least one of the first adsorption member and the second adsorption member is an electromagnet.

[0018] A buffer pad is arranged at the bottom of the support frame, and when the lifting member moves to the lowest position, the lifting member conflicts with the buffer pad.

[0019] The lifting end of the linkage rod is provided with a limiting convex ring, and when the adsorption end moves to the second position, the limiting convex ring is clamped with the support frame.

[0020] It also includes a position detector, which is installed on the support frame and detects the position of the linkage rod.

[0021] The elevator car comprises a car body, a safety clamp and the aforementioned safety clamp lifting device, wherein the safety clamp is installed on the outside of the car body, the safety clamp lifting device is installed on the outside of the car body and located above the safety clamp, and the lifting end of the linkage rod acts on the safety clamp.

[0022] The method for using an elevator car comprises the following steps: identifying that the car body is working, the adsorption end of the linkage rod cooperates with the lifting mechanism through a magnetic attraction piece and an electromagnet, the linkage rod moves downward to reach the lowest point, the elastic reset piece is in an energy storage state, and the safety clamp is in a relaxed state; identifying that the car body is working abnormally, the adsorption end of the linkage rod is released from the lifting mechanism through the magnetic attraction piece and the electromagnet, the elastic reset piece releases energy, the linkage rod is driven to be pulled upward, the safety clamp is in a clamped state, and the car body stops moving.

[0023] The principles and advantages of this solution:

[0024] During installation, the safety clamp lifting device is installed above the safety clamp. At this time, the linkage rod protrudes from the support frame toward the safety clamp, and then the lifting end is connected to the safety clamp lifting rod. When the safety clamp is driven, the linkage rod moves downward to the lowest position. At this time, the safety clamp is in a relaxed state, and the elevator is operating normally; when the linkage rod moves upward, at this time, driven by the linkage rod, the safety clamp is in a clamped state, and the elevator cannot operate, completing the safety locking state of the elevator. Here, the first adsorption member and the second adsorption member cooperate, so when the lifting mechanism moves, the linkage rod can be driven to move. In order to ensure that the safety clamp is in a relaxed state, the lifting mechanism moves downward. Driven by the lifting mechanism, the linkage rod also moves downward, and the lifting end reaches the lowest position. The elevator is in this position when it works normally; once the elevator moves abnormally, such as the descending speed is too fast, the safety clamp lifting device will be cut off from the working power supply, and the first adsorption member and the second adsorption member will be immediately released. When the restraint of the elastic reset member is released, the deformation is quickly restored, driving the linkage rod to lift upward, and the lifting end of the linkage rod drives the safety clamp to be in a clamped state, completing the braking of the elevator. Here, only the safety clamp lifting device is used to operate the safety clamp, which has a compact structure and is easy to install and debug.

[0025] In addition, the first connection end, the second connection end, the plate and the middle avoidance groove structure of the lifting member form a movement space that does not interfere with the intermediate linkage rod and the elastic reset member at all. Therefore, no matter when and in what state the lifting mechanism is, the linkage rod and its elastic reset member can realize emergency braking action, effectively ensuring the safety of the safety clamp action.

[0026] In addition, the safety clamp is driven by the elastic reset member when the working power is cut off, which is a power-off safety drive, that is, the safety action does not need to rely on external energy, but is implemented by internal energy. It is more in line with safety requirements.

[0027] In addition, the lifting mechanism of the present invention is located at the upper part of the safety clamp, which is beneficial to the spatial layout of the safety clamp in the lower part of the elevator system and effectively reduces the distance between the safety clamp and the bottom pit of the hoistway. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings herein show specific examples of the technical solutions described in the present invention, and together with the specific implementation methods constitute a part of the specification, and are used to explain the technical solutions, principles and effects of the present invention.

[0029] Unless otherwise specified or defined, the same reference numerals in different drawings represent the same or similar technical features, and the same or similar technical features may also be represented by different reference numerals.

[0030] Figure 1 is a schematic diagram of the three-dimensional structure when the first adsorption component and the second adsorption component of the embodiment of the present invention cooperate with each other;

[0031] Figure 2 The embodiment of the present invention Figure 1 Schematic diagram of the plane;

[0032] Figure 3 is a schematic diagram of the three-dimensional structure of the first adsorption member and the second adsorption member when the coordination is released according to the embodiment of the present invention;

[0033] Figure 4 The embodiment of the present invention Figure 3 Schematic diagram of the plane;

[0034] Figure 5 is a schematic diagram of the three-dimensional structure of the lifting member of the embodiment of the present invention when it moves upward;

[0035] Figure 6 is a schematic diagram of the three-dimensional structure of the lifting member after moving upward according to the embodiment of the present invention;

[0036] Figure 7 is a schematic diagram of the three-dimensional structure when the lifting member of the embodiment of the present invention drives the adsorption end to move downward;

[0037] Figure 8 The embodiment of the present invention Figure 7 A schematic diagram of the structure enlargement in the middle;

[0038] Fig. 9 is a schematic diagram of the three-dimensional structure of an elevator car according to an embodiment of the present invention;

[0039] Fig.10 The embodiment of the present invention Fig. 9 Enlarged schematic diagram of the structure at point B in the middle.

[0040] Description of reference numerals:

[0041] 10. Linkage rod; 11. First adsorption member; 12. Adsorption end; 121. Connecting plate; 13. Lifting end; 131. Position limiting convex ring; 20. Elastic reset member; 21. Spring; 30. Support frame; 31. Slide groove; 32. Buffer pad; 40. Lifting mechanism; 41. Second adsorption member; 42. Power source; 421. Drive motor; 422. Screw rod; 423. Matching block; 43. Lifting member; 431. First connecting end; 432. Second connecting end; 4321. Avoidance groove; 50. Position detector; 60. Car body; 70. Safety clamp. DETAILED DESCRIPTION

[0042] In order to facilitate the understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0043] Unless otherwise specified or defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art. In the case of combining the technical solution of the present invention with a realistic scenario, all technical and scientific terms used herein may also have meanings corresponding to the purpose of implementing the technical solution of the present invention.

[0044] Unless otherwise specified or defined, the "first, second..." used in this article is merely used to distinguish names and does not represent a specific quantity or order.

[0045] Unless specifically stated or defined otherwise, the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0046] It should be noted that when a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there can be a central component; when an component is considered to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time; when an component is considered to be "installed on" another component, it can be directly installed on the other component or there can be a central component at the same time. When an component is considered to be "set on" another component, it can be directly set on the other component or there can be a central component at the same time.

[0047] like Figures 1 to 4As shown, the safety clamp lifting device includes a linkage rod 10, an elastic reset member 20, a support frame 30 and a lifting mechanism 40, wherein the lifting mechanism 40 is movably mounted on the support frame 30; a first adsorption member 11 is mounted on the linkage rod 10, and a second adsorption member 41 is mounted on the lifting mechanism 40; one end of the linkage rod 10 close to the lifting mechanism 40 is an adsorption end 12, on which the first adsorption member 11 is mounted, and the other end is a lifting end 13, and the lifting end 13 passes through the support frame 30, and the second adsorption member 41 on the lifting mechanism 40 is located between the adsorption end 12 and the lifting end 13, and the first adsorption member 11 cooperates with the second adsorption member 41; one end of the elastic reset member 20 acts on the support frame 30, and the other end acts on the linkage rod 10.

[0048] During installation, the safety clamp lifting device is installed above the safety clamp 70. At this time, the linkage rod 10 protrudes from the support frame 30 toward the safety clamp 70, and then the lifting end 13 extends into the safety clamp 70 to drive the safety clamp 70. When the linkage rod 10 extends downward to the lowest position, the safety clamp 70 is in a relaxed state and the elevator is operating normally; when the linkage rod 10 moves upward, the safety clamp 70 is driven by the linkage rod 10 to be in a clamped state, the elevator cannot run, and the safety locking state of the elevator is completed. Here, the first adsorption member 11 and the second adsorption member 41 cooperate with each other, so when the lifting mechanism 40 moves, the linkage rod 10 can be driven to move. In order to ensure that the safety clamp 70 is in a relaxed state, the lifting mechanism 40 is moved downward. Driven by the lifting mechanism 40, the linkage rod 10 also moves downward, and the pulling end 13 reaches the lowest position, which is the position when the elevator is working normally. Once the elevator moves abnormally, such as the descent speed is too fast, the safety clamp lifting device receives an abnormal signal, and the first adsorption member 11 and the second adsorption member 41 are immediately released. When the restraint of the elastic reset member 20 is released, the deformation is quickly restored, and the linkage rod 10 is driven to lift upward. The pulling end 13 of the linkage rod 10 drives the safety clamp 70 to be in a clamped state, thereby completing the locking of the elevator.

[0049] like Figures 1 to 4 As shown, the lifting mechanism 40 includes a power source 42 and a lifting member 43, wherein the power source 42 drives the lifting member 43, and the second adsorption member 41 is installed on the lifting member 43. The lifting member 43 is driven by the power source 42, and the movement of the lifting member 43 is achieved through the cooperation of the second adsorption member 41 and the first adsorption member 11 to adjust the position of the linkage rod 10.

[0050] When the elastic reset member 20 is in the state of compressing and storing energy, the adsorption end 12 of the linkage rod 10 is in the first position. Figure 1 and Figure 2As shown, the adsorption end 12 is in the first position; when the elastic reset member 20 is in the state of releasing energy and at least partially restoring the shape, the adsorption end 12 of the linkage rod 10 is in the second position, as shown in FIG. Figure 3 and Figure 4 As shown, the suction end 12 is located at the second position; the lifting member 43 always avoids the second position during the movement.

[0051] The first position is the position where the safety clamp 70 is in a relaxed state, at which time the elevator can operate normally, and the second position is the position where the safety clamp 70 is in a clamped state, at which time the elevator is locked and cannot operate. Therefore, when the elevator is running, the suction end 12 of the linkage rod 10 is in the first position. Once an abnormality occurs in the elevator, the safety action is triggered. At this time, the first suction member 11 and the second suction member 41 are quickly released from the match, ensuring that the suction end 12 of the linkage rod 10 is pulled upward to reach the second position, triggering the locking effect of the safety clamp 70. Since the lifting member 43 avoids the second position, the suction end 12 of the linkage rod 10 can move to the second position without obstruction.

[0052] like Figures 5 to 7 As shown, when the suction end 12 of the linkage rod 10 needs to be reset from the second position to the first position, the power source 42 drives the lifting member 43 to move the second suction member 41 on the lifting member 43 toward the first suction member 11 of the linkage rod 10 until the first suction member 11 and the second suction member 41 are matched, and then the power source 42 drives the lifting member 43 in the reverse direction. At this time, the suction end 12 of the linkage rod 10 moves relative to the first position under the action of the lifting member 43 until it moves to the second position. Here, even if an elevator failure occurs during operation, since the lifting member 43 always avoids the second position, no matter where the lifting member 43 moves to, it can be restored to the second position, ensuring that the safety clamp 70 can be driven and locked by the linkage rod 10 at any time.

[0053] The first adsorption member 11 and the second adsorption member 41 are electromagnets or magnetic attractants, and at least one of the first adsorption member 11 and the second adsorption member 41 is an electromagnet. In this embodiment, the first adsorption member 11 is a magnetic attractant, and the second adsorption member 41 is an electromagnet, so the coordination between the electromagnet and the magnetic attractant is achieved by energizing the electromagnet. Therefore, when the elevator suddenly loses power, the electromagnet loses its power supply and its magnetism disappears. At this time, the coordination between the electromagnet and the magnetic attractant is released, and the linkage rod 10 resets the adsorption end 12 to the second position under the action of the elastic reset member 20.

[0054] The magnetic attraction member may be a metal that can be magnetically attracted or a permanent magnet. In this embodiment, the magnetic attraction member is an iron sheet.

[0055] like Figures 1 to 4As shown, the lifting member 43 includes a first connection end 431 and a second connection end 432, wherein the first connection end 431 is connected to the power source 42, and the second connection end 432 is connected to the second adsorption member 41; during the movement of the lifting member 43, the first connection end 431 and the second connection end 432 are always located on both sides of the second position. The first connection end 431 provides power, and the second connection end 432 is used to drive the linkage rod 10. The two functions are divided to avoid interference. In addition, during the movement of the lifting member 43, it is ensured that the first connection end 431 and the second connection end 432 will not interfere with the second position, that is, it is ensured that the adsorption end 12 of the linkage rod 10 can retreat to the second position.

[0056] like Figures 5 to 7 As shown, the first connection end 431 and the second connection end 432 are connected from the edge by a plate or a rod, and a avoidance groove 4321 is provided in the middle of the second connection end 432, and the linkage rod 10 passes through the avoidance groove 4321. The plate or the rod connects the first connection end 431 and the second connection end 432, so that when the power source 42 drives the first connection end 431, the second connection end 432 moves synchronously.

[0057] In addition, the side between the first connection end 431 and the second connection end 432 is closed by a plate, and there is at least one plate connecting the first connection end 431 and the second connection end 432, and at least one side is open. The one side opening is provided to facilitate the installation of the second adsorption member 41 and the position of the adsorption end 12 of the detection linkage rod 10. Moreover, the plates provided on multiple sides can improve the tensile strength.

[0058] like Figures 5 to 7 As shown, a connecting plate 121 is provided on the adsorption end 12, and the first adsorption member 11 is installed on the connecting plate 121; the second connecting end 432 is located on both sides of the avoidance groove 4321 and is provided with a second adsorption member 41; the elastic reset member 20 is a spring 21, and the spring 21 is sleeved on the linkage rod 10, one end of the spring 21 acts on the support frame 30, and the other end acts on the adsorption end 12 of the linkage rod 10. The first adsorption member 11 on the connecting plate 121 cooperates with the second adsorption member 41, and the second adsorption member 41 is provided on both sides of the avoidance groove 4321, so the cooperation between the first adsorption member 11 and the second adsorption member 41 is more stable. By utilizing the elastic compression principle of the spring 21, a reset force is provided to the linkage rod 10, ensuring that the adsorption end 12 of the linkage rod 10 is reset to the second position under the action of the spring 21, and the position of the spring 21 sleeved on the linkage rod 10 is fixed.

[0059] like Figure 8As shown, the support frame 30 is provided with a slide groove 31 on both sides close to the lifting member 43, and the lifting member 43 slides along the slide groove 31. The slide groove 31 guides the lifting member 43 to prevent the lifting member 43 from being offset when moving. Specifically, a guide protrusion is provided outwardly at the first connection end 431 and the second connection end 432, and the guide protrusion cooperates with the slide groove 31. In addition, guide protrusions are provided on both sides of the connecting plate 121, and the guide protrusions of the connecting plate 121 cooperate with the slide groove 31.

[0060] like Figures 5 to 7 As shown, the power source 42 includes a driving motor 421, a screw rod 422 and a matching block 423. The motor is fixedly mounted on the support frame 30. The motor output shaft drives the screw rod 422 to rotate. The matching block 423 is mounted on the first connecting end 431. The screw rod 422 cooperates with the matching block 423 to drive the first connecting end 431 to move back and forth. The driving motor 421 drives the screw rod 422 to control the movement of the first connecting end 431, thereby realizing the movement of the lifting member 43, and then driving the movement of the linkage rod 10. At this time, the reciprocating motion of the lifting member 43 is realized by reverse and forward rotation. In addition, after the screw rod 422 and the driving motor 421 are installed, their positional relationship is only a rotational relationship, so there will be no extension or shortening, so there will be no interference with the movement of the linkage rod 10 when the motor and the screw rod 422 rotate.

[0061] In another embodiment, the power source 42 is a cylinder or a hydraulic cylinder, and the telescopic rod of the cylinder or the hydraulic cylinder acts on the first connection end 431. When the telescopic rod is extended outward, the first connection end 431 is at the bottom, and the first connection end 431 does not interfere with the second position, so the second position can be guaranteed not to be disturbed even after the telescopic rod is retracted.

[0062] like Figures 5 to 7 As shown, a buffer pad 32 is provided at the bottom of the support frame 30. When the lifting member 43 moves to the lowest position, the lifting member 43 conflicts with the buffer pad 32. The buffer pad 32 limits the lifting member 43 and controls the downward position of the lifting member 43. The upper layer of the buffer pad 32 is made of soft material and is made of rubber. The buffer layer has a certain height, so that a space is ensured between the connecting plate 121 and the bottom of the support frame 30, and the space can accommodate the compressed spring 21.

[0063] like Figures 1 to 4As shown, the lifting end 13 of the linkage rod 10 is provided with a limiting convex ring 131, and when the adsorption end 12 moves to the second position, the limiting convex ring 131 is locked with the support frame 30. The limiting convex ring 131 controls the highest rising position of the lifting member 43, and can also prevent the lifting end 13 from entering the support frame 30, affecting the normal operation of the entire device.

[0064] like Figure 1 As shown, the safety clamp lifting device further includes a position detector 50, which is mounted on the support frame 30 to detect the position of the linkage rod 10. The position detector 50 can detect the position of the linkage rod 10 in real time to determine whether the linkage rod 10 is at a specified position.

[0065] like Fig. 9 and Fig.10 As shown, the elevator car comprises a car body 60, a safety clamp 70 and the aforementioned safety clamp lifting device, wherein the safety clamp 70 is installed outside the car body 60, the safety clamp lifting device is installed outside the car body 60 and located above the safety clamp 70, and the lifting end 13 of the linkage rod 10 acts on the safety clamp 70. With the automatic elevator car, the safety clamp 70 is controlled by the safety clamp lifting device to achieve elevator braking.

[0066] The method for using the elevator car comprises the following steps: recognizing that the car body 60 is working, the adsorption end 12 of the linkage rod 10 cooperates with the lifting mechanism 40 through the magnetic attraction part and the electromagnet, the linkage rod 10 moves downward to reach the lowest point, the elastic reset part 20 is in an energy storage state, and the safety clamp 70 is in a relaxed state;

[0067] The abnormal operation of the car body 60 is identified, the adsorption end 12 of the linkage rod 10 and the lifting mechanism 40 are released through the cooperation of the magnetic attraction member and the electromagnet, the elastic reset member 20 releases energy, the linkage rod 10 is driven to be pulled upward, the safety clamp 70 is in a clamped state, and the car body 60 stops moving.

[0068] When quoting drawing descriptions, new features that appear are described; in order to avoid repeated quotations of drawings resulting in less concise descriptions, features that have been described clearly will not be quoted in the drawings one by one.

[0069] The purpose of the above embodiments is to exemplarily reproduce and deduce the technical solution of the present invention, and to fully describe the technical solution, purpose and effect of the present invention. Its purpose is to make the public understand the disclosed content of the present invention more thoroughly and comprehensively, and it does not limit the scope of protection of the present invention.

[0070] The above embodiments are not exhaustive enumerations of the present invention, and there may be multiple other implementations not listed. Any replacement and improvement made without violating the concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. Safety clamp lifting device, characterized in that: It includes a linkage rod, an elastic reset member, a support frame and a lifting mechanism, wherein the lifting mechanism is movably mounted on the support frame; A first adsorption member is installed on the linkage rod, and a second adsorption member is installed on the lifting mechanism; One end of the linkage rod close to the lifting mechanism is a suction end, the suction end is installed with the first suction piece, and the other end is a lifting end, and the lifting end passes through the support frame, the second suction piece on the lifting mechanism is located between the suction end and the lifting end, and the first suction piece cooperates with the second suction piece; One end of the elastic reset member acts on the support frame, and the other end acts on the linkage rod; The lifting mechanism comprises a power source and a lifting member, the power source drives the lifting member, and the second adsorption member is installed on the lifting member; When the elastic reset member is in the state of compressing and storing energy, the position of the adsorption end of the linkage rod is the first position; when the elastic reset member is in the state of releasing energy and at least partially restoring its shape, the position of the adsorption end of the linkage rod is the second position; The lifting member always avoids the second position during the movement.

2. The safety clamp lifting device according to claim 1, characterized in that: The lifting member includes a first connecting end and a second connecting end, the first connecting end is connected to the power source, and the second connecting end is connected to the second adsorption member; During the movement of the lifting member, the first connecting end and the second connecting end are always located at two sides of the second position.

3. The safety clamp lifting device according to claim 2, characterized in that: The first connection end and the second connection end are connected at the edge through a plate or a rod, and a avoidance groove is provided in the middle of the second connection end, and the linkage rod passes through the avoidance groove.

4. The safety clamp lifting device according to claim 3, characterized in that: The side portion between the first connection end and the second connection end is closed by a plate, and there is at least one plate connecting the first connection end and the second connection end, and at least one side is ensured to be open.

5. The safety clamp lifting device according to claim 2, characterized in that: The power source includes a driving motor, a screw rod and a matching block. The motor is fixedly mounted on the support frame. The motor output shaft drives the screw rod to rotate. The matching block is mounted on the first connecting end. The screw rod cooperates with the matching block to drive the first connecting end to move back and forth.

6. The safety clamp lifting device according to claim 3, characterized in that: The adsorption end is provided with a connecting plate, and the first adsorption member is mounted on the connecting plate; The second connecting end is provided with second adsorption parts on both sides of the avoidance groove; The elastic reset member is a spring, which is sleeved on the linkage rod. One end of the spring acts on the support frame, and the other end acts on the adsorption end of the linkage rod.

7. The safety clamp lifting device according to claim 1, characterized in that: A buffer pad is arranged at the bottom of the support frame, and when the lifting member moves to the lowest position, the lifting member conflicts with the buffer pad.

8. The safety clamp lifting device according to any one of claims 1 to 7, characterized in that: The first adsorption member and the second adsorption member are electromagnets or magnetic adsorption members, and at least one of the first adsorption member and the second adsorption member is an electromagnet.

9. The safety clamp lifting device according to any one of claims 1 to 7, characterized in that: The lifting end of the linkage rod is provided with a limiting convex ring, and when the adsorption end moves to the second position, the limiting convex ring is clamped with the support frame.

10. The safety clamp lifting device according to any one of claims 1 to 7, characterized in that: It also includes a position detector, which is installed on the support frame and detects the position of the linkage rod.

11. An elevator car, characterized in that: It comprises a car body, a safety clamp and the safety clamp lifting device according to any one of claims 1 to 10, wherein the safety clamp is installed on the outside of the car body, the safety clamp lifting device is installed on the outside of the car body and located above the safety clamp, and the lifting end of the linkage rod acts on the safety clamp.

12. A method for using an elevator car, using the elevator car according to claim 11, comprising the following steps: When the car body is working, the adsorption end of the linkage rod cooperates with the lifting mechanism through the magnetic attraction part and the electromagnet, the linkage rod moves downward to reach the lowest point, the elastic reset part is in the energy storage state, and the safety clamp is in the relaxed state; Identify the abnormal operation of the car body, the adsorption end of the linkage rod and the lifting mechanism are released through the cooperation of the magnetic suction part and the electromagnet, the elastic reset part releases energy, the linkage rod is driven to be pulled upward, the safety clamp is in a clamped state, and the car body stops moving.

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