An elevator compensation chain for quickly eliminating stress and its usage method

Abstract

The present invention discloses a lift compensation chain for quickly eliminating stress and its usage method, which relates to the technical field of compensation chains. It includes chain links, connection frames, and stress elimination units. A connecting rod is movably installed through the inside of the chain link. A spherical bearing is installed through the bottom of the connection frame. A swing rod is installed inside the spherical bearing. The bottom of the swing rod is connected to the top of another chain link below. The stress elimination unit is arranged on the outside of the chain link to quickly eliminate the swing of the chain link parallel to the plane where the lift and the counterweight are located. The present invention applies an elastic pressure to the sprocket, enabling the swinging compensation chain to quickly stop swinging, quickly eliminating the stress between the chain links, reducing the phenomenon of uneven counterweight caused by the swing of the compensation chain, increasing the stability of the lift, and enabling the lifting ring to move upward to increase the maximum swing angle of the chain link when the pressure of the pressing wheel on the chain link is too large, thereby reducing the pressure of the pressing wheel on the chain link and reducing the damage to the pressing wheel and the chain link.

Description

Technical Field

[0001] The present invention relates to the technical field of compensating chains, and particularly to an elevator compensating chain capable of quickly eliminating stress and a using method thereof. Background Art

[0002] An elevator compensating chain is a chain installed under an elevator and a counterweight to balance the weight of the traction rope between the elevator and the counterweight. The traction rope between the elevator and the counterweight will cause the center of gravity to move back and forth between the elevator side and the counterweight side as the elevator moves up and down, thereby causing instability in the operation of the elevator. The compensating chain can compensate for the instability of the elevator caused by the change of the center of gravity of the traction rope. The traditional compensating chain is prone to swing when the elevator moves up and down. The swing of the compensating chain will cause the center of gravity of the compensating chain to move back and forth, and also cause instability during the operation of the elevator. Moreover, the stress between the chain links of the swinging compensating chain is sometimes large and sometimes small, which is likely to damage the compensating chain and the end connection position of the compensating chain.

[0003] The defects of the existing compensating chains are as follows:

[0004] 1. Patent document US3768596A discloses an elevator compensating chain. The elastic spacers provided by the alternating links of the elevator compensating chain in this patent keep the connection fully extended, thus eliminating the chain rattle. However, this compensating chain lacks a structure for quickly reducing the swing of the chain links. When the chain links swing, internal components will generate stress, and it is easy to cause the center of gravity of the compensating chain to move, resulting in unstable operation of the elevator. Therefore, a quick stress-eliminating elevator compensating chain that can quickly eliminate the swing of the elevator compensating chain and the stress generated by the swing is needed to solve this problem.

[0005] 2. Patent document KR101009296B1 discloses an elevator compensating chain and a manufacturing method for a curve radius curve. This patent discloses a method for manufacturing an elevator compensating chain with an adjustable radius of curvature and provides an elevator compensating chain manufactured using the same to prevent noise and shock. This compensating chain does not have the function of adjusting temperature. The compensating chain is generally made of metal materials. Metals are prone to cold brittleness in cold weather, and their toughness decreases and they are easily broken. The compensating chain is more likely to break, affecting the use safety of the elevator. Therefore, a quick stress-eliminating elevator compensating chain that can adjust the temperature of the compensating chain is needed to solve this problem.

[0006] 3. Patent document JP2008291888A discloses a chain. The chain in this patent reduces frictional losses during chain operation and prevents the chain from running in the chain shoe. This chain does not have a dehumidifying structure. When the chain encounters moisture in the air, it is prone to rust, causing the connecting parts of the chain to be fixed together due to rust, thereby affecting the movement of the chain links in the chain. When used as an elevator compensation chain, the chain is prone to rust, resulting in the inability of the chain links to move, thereby affecting the bending ability of the compensation chain and causing the chain to be unable to bend normally to achieve the compensation of the elevator counterweight. Therefore, a rapid stress-relieving elevator compensation chain that can reduce moisture is needed to solve this problem.

[0007] 4. Patent document CN101445200B discloses an elevator car compensation chain. During the operation of the elevator in this patent, the compensation chain has better stability, improving the comfort and safety of the elevator. The bending amplitude of the chain of this compensation chain is stable and the swing is small. However, if the compensation chain collides with an object below, due to the small bending amplitude of the compensation chain, the chain links of the compensation chain are prone to be subjected to greater internal stress, thereby easily causing damage to the compensation chain and the end connection components between the compensation chain and the elevator. Therefore, a rapid stress-relieving elevator compensation chain that can buffer when the compensation chain collides with an object below and can increase the bending ability of the compensation chain during the collision is needed to solve this problem. Summary of the Invention

[0008] An object of the present application is to provide a rapid stress-relieving elevator compensation chain and its usage method, which can solve the technical problems raised in the prior art.

[0009] To achieve the above object, the present invention provides the following technical solution: A rapid stress-relieving elevator compensation chain, including chain links, connection frames, stress elimination units, temperature control units, anti-collision units, moisture absorption units, and a central processing unit. The anti-collision unit includes an anti-bottom collision unit and an anti-side collision unit. A connecting rod is movably installed through the inside of the chain link. The connection frame is located outside the connecting rod. A joint bearing is installed through the bottom of the connection frame. A swing rod is installed inside the joint bearing. The bottom of the swing rod is connected to the top of another chain link below;

[0010] The stress elimination unit is arranged on the outside of the chain link to quickly eliminate the swing of the chain link parallel to the plane where the elevator and the counterweight are located. The temperature control unit is arranged inside the chain link to prevent the temperature of the chain link from being too low. The anti-bottom collision unit is used to reduce the damage caused by the bottom of the compensation chain being collided. The anti-side collision unit is used to prevent the two sides of the compensation chain from being collided and damaged. The moisture absorption unit is arranged on the front of the stress elimination unit to absorb moisture in the air. The central processing unit is used to control the operation of the power components of the compensation chain.

[0011] Preferably, a first heat insulation cotton is installed on the outer side of the link, sealing rings are symmetrically installed on the outer side of the connecting rod, and the sealing rings are located on both sides of the connecting frame. A second heat insulation cotton is installed on the outer side of the connecting frame. Bolts are symmetrically installed through the front surface of the link. A plurality of first buffer springs are symmetrically installed at the bottom of the connecting frame, and one end of the first buffer spring is connected to the top of the link.

[0012] Preferably, the temperature control unit includes a first temperature detection unit and a first heating unit. The two first temperature detection units are symmetrically installed on the inner side of the link, and the two first heating units are symmetrically installed through the top of the link.

[0013] Preferably, the stress elimination unit includes a first electric telescopic unit, a lifting ring, a first pressure detection unit, a second buffer spring, a moving rod, a mounting block and a pressing wheel. The two first electric telescopic units are symmetrically installed on both sides of the link. The output end of the first electric telescopic unit is installed with a lifting ring. Receiving grooves are symmetrically opened on the inner walls of the back and front of the lifting ring. The front inner wall of the front receiving groove is installed with a first pressure detection unit. The input end of the first pressure detection unit is installed with a third buffer spring. One end of the third buffer spring is installed with a moving rod. Mounting blocks are symmetrically installed on the back of the moving rod. Pressing wheels are movably installed through the inner sides of the mounting blocks.

[0014] Preferably, the moisture absorption unit includes a grid frame, silica gel desiccant, a second heating unit, a humidity detection unit and a second temperature detection unit. The grid frame is installed on the front of the lifting ring. The silica gel desiccant is installed inside the grid frame. The second heating unit is installed inside the grid frame and is located inside the silica gel desiccant. The humidity detection unit is installed on the front inner wall of the grid frame. The second temperature detection unit is installed on the front inner wall of the grid frame.

[0015] Preferably, the anti-bottom collision unit includes a mounting frame, a second pressure detection unit, a third buffer spring, a buffer plate, a first transparent box, a first distance measurement unit, a storage box, a second electric telescopic unit and a first wiping plate. The mounting frame is installed on the back of the lifting ring. The second pressure detection unit is installed on the front inner wall of the mounting frame. The input end of the second pressure detection unit is installed with a third buffer spring. One end of the third buffer spring is installed with a buffer plate. The first transparent box is installed on the top of the mounting frame. The first distance measurement unit is installed inside the first transparent box. The storage box is installed on the top of the first transparent box. The second electric telescopic unit is installed on the top inner wall of the storage box. The output end of the second electric telescopic unit is installed with a first wiping plate.

[0016] Preferably, the side collision prevention unit includes a second transparent box, a second distance measuring unit, a mounting plate, a third electric telescopic unit, and a second wiping plate. The two second transparent boxes are symmetrically installed on the top of the lifting ring. The second distance measuring unit is installed inside the second transparent box. The mounting plate is installed on the top of the second transparent box. The third electric telescopic unit is installed on one side of the mounting plate. The output end of the third electric telescopic unit is installed with the second wiping plate.

[0017] Preferably, the central processing unit includes a logic control sub-unit and a micro-control unit. The central processing unit is installed on the front of the mounting frame. The micro-control unit is electrically connected to the first temperature detection unit, the first heating unit, the first electric telescopic unit, the first pressure detection unit, the second heating unit, the humidity detection unit, the second pressure detection unit, the first distance measuring unit, the second electric telescopic unit, the second distance measuring unit, the third electric telescopic unit, and the second temperature detection unit. The logic control sub-unit is used to judge the signals received by the micro-control unit and issue the judgment results.

[0018] Preferably, the usage method of the elevator compensation chain for quickly eliminating stress is as follows:

[0019] S1. Connect the adjacent upper and lower chain links through connecting rods and connecting frames. After connecting multiple chain links to form a compensation chain, use the first temperature detection unit to detect the ambient temperature. After the logic control sub-unit judges that the ambient temperature is lower than the set value, the micro-control unit controls the first heating unit to heat the chain links until the first temperature detection unit detects that the temperature of the chain links reaches the specified value;

[0020] S2. Use silica gel desiccant to absorb the moisture in the surrounding environment and reduce the rust phenomenon caused by the erosion of moisture on components such as chain links. Use the humidity detection unit to detect the humidity of the silica gel desiccant. After the logic control sub-unit judges that the humidity of the silica gel desiccant is higher than the set value, the micro-control unit controls the second heating unit to heat the silica gel desiccant until the humidity detection unit detects that the humidity of the silica gel desiccant is lower than the set value;

[0021] S3. When the data measured by the first distance measuring unit and the second pressure detection unit are normal, the micro-control unit controls the first electric telescopic unit to drive the lifting ring to move downward, so that the pressing wheel exerts elastic pressure on the front and rear of the chain link, making the swing in the front direction of the chain link smaller. At the same time, the first pressure detection unit detects the pressure of the pressing wheel on the chain link. When the logic control sub-unit judges that the pressure of the first pressure detection unit increases, the micro-control unit controls the first electric telescopic unit to drive the lifting ring to move upward. When the logic control sub-unit judges that the pressure of the first pressure detection unit decreases, the micro-control unit controls the first electric telescopic unit to drive the lifting ring to move downward;

[0022] S4. When the back of the link of the compensation chain faces the ground, the distance between the object on the ground and the first ranging unit is detected by the first ranging unit. After the logic control subunit determines that the data measured by the first ranging unit is lower than the set value, the first electric telescopic unit is controlled by the micro control unit to drive the lifting ring to move upward, so that the pressing wheel on the lifting ring cancels the rotation restriction on the link, enabling the link to have a larger rotation angle in the front-back direction, and avoiding damage caused by excessive stress between the components of the link due to the inability to rotate when the front-back rotation angle of the link is too small due to collision.

[0023] S5. The distances between the objects on both sides of the link and the second ranging unit are measured by the second ranging unit. When the logic control subunit determines that the measured distance is lower than the set value, the first electric telescopic unit is controlled by the micro control unit to drive the lifting ring to move upward, so that the pressing wheel on the lifting ring cancels the rotation restriction on the link, enabling the link to have a larger rotation angle in the left-right direction, and avoiding damage caused by excessive stress between the components of the link due to the inability to rotate when the left-right rotation angle of the link is too small due to collision.

[0024] Preferably, the following steps are further included in the S4:

[0025] S41. When the collision speed between the back of the link and the ground is too fast, the buffer plate first contacts the ground, and the third buffer spring buffers the collision of the buffer plate, reducing the damage to the link caused by the collision. At the same time, the second pressure detection unit transmits the pressure received by the buffer plate to the micro control unit. When the logic control subunit determines that the pressure measured by the second pressure detection unit is too large, the first electric telescopic unit is controlled by the micro control unit to drive the lifting ring to move upward, and then the pressing wheel on the lifting ring cancels the rotation restriction on the link, enabling the link to have a larger rotation angle in the front-back direction, and avoiding damage caused by excessive stress between the components of the link due to the inability to rotate when the front-back rotation angle of the link is too small due to collision.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. The micro - control unit of the present invention controls the first electric telescopic unit to drive the lifting ring to move downward, so that the pressure wheel exerts elastic pressure on the front and rear of the chain link, gradually reducing the swing of the chain link in the front - rear direction, thereby reducing the swing amplitude of the compensating chain during the up - and - down movement of the elevator and the counterweight. Moreover, the swing amplitude is quickly reduced, quickly eliminating the stress between the chain links, and further reducing the phenomenon of uneven counterweight caused by the swing of the compensating chain, increasing the stability of the elevator. By detecting the pressure of the pressure wheel on the chain link through the first pressure detection unit, when the logic control sub - unit determines that the pressure of the first pressure detection unit increases, the micro - control unit controls the first electric telescopic unit to drive the lifting ring to move upward, thus avoiding excessive pressure on the pressure wheel when the compensating chain bends too much, thereby reducing the damage to the pressure wheel and the chain link. The elevator compensating chain that quickly eliminates stress can exert elastic pressure on the sprocket, enabling the swinging compensating chain to quickly stop swinging, quickly eliminating the stress between the chain links, further reducing the phenomenon of uneven counterweight caused by the swing of the compensating chain, increasing the stability of the elevator, and increasing the maximum swing angle of the chain link by moving the lifting ring upward when the pressure of the pressure wheel on the chain link is too large, thereby reducing the pressure of the pressure wheel on the chain link and reducing the damage to the pressure wheel and the chain link.

[0028] 2. The present invention detects the ambient temperature through the first temperature detection unit. After the logic control sub - unit determines that the ambient temperature is lower than the set value, the micro - control unit controls the first heating unit to heat the chain link until the first temperature detection unit detects that the temperature of the chain link reaches the specified value, avoiding the situation of increased cold brittleness and cracking due to too low temperature of the chain link. The elevator compensating chain that quickly eliminates stress detects the ambient temperature through the first temperature detection unit. After the logic control sub - unit determines that the ambient temperature is lower than the set value, the micro - control unit controls the first heating unit to heat the chain link until the first temperature detection unit detects that the temperature of the chain link reaches the specified value, avoiding the situation of increased cold brittleness and cracking due to too low temperature of the chain link.

[0029] 3. The present invention absorbs the moisture in the surrounding environment through the silica gel desiccant, reducing the rust phenomenon caused by the erosion of moisture on components such as the chain link. The humidity of the silica gel desiccant is detected through the humidity detection unit, and after the logic control sub - unit determines that the humidity of the silica gel desiccant is higher than the set value, the micro - control unit controls the second heating unit to heat the silica gel desiccant until the humidity detection unit detects that the humidity of the silica gel desiccant is lower than the set value. The elevator compensating chain that quickly eliminates stress absorbs the moisture in the surrounding environment through the silica gel desiccant, reducing the rust phenomenon caused by the erosion of moisture on components such as the chain link, and further avoiding the situation that the chain link is difficult to rotate due to rust. The humidity of the silica gel desiccant is detected through the humidity detection unit, and after the logic control sub - unit determines that the humidity of the silica gel desiccant is higher than the set value, the micro - control unit controls the second heating unit to heat and dry the silica gel desiccant so that the silica gel desiccant can continue to absorb moisture.

[0030] 4. When the buffer plate contacts the ground in the present invention, the third buffer spring buffers the collision of the buffer plate, reducing the damage to the chain link caused by the collision. At the same time, the second pressure detection unit transmits the pressure received by the buffer plate to the micro-control unit. When the logic control sub-unit determines that the pressure measured by the second pressure detection unit is too large, the micro-control unit controls the first electric telescopic unit to drive the lifting ring to move upward. As a result, the pressure wheel on the lifting ring cancels the rotation restriction on the chain link, enabling the chain link to have a larger rotation angle in the front-back direction, avoiding damage caused by excessive stress between the components of the chain link due to the inability to rotate when the chain link is collided with a low front-back rotation angle. When the elevator compensation chain for quickly eliminating stress contacts the ground with the buffer plate, the third buffer spring buffers the collision of the buffer plate, reducing the damage to the chain link, and the first electric telescopic unit drives the lifting ring to move upward, so that the pressure wheel on the lifting ring cancels the rotation restriction on the chain link, enabling the chain link to have a larger rotation angle in the front-back direction, avoiding damage caused by excessive stress between the components of the chain link due to the inability to rotate when the front-back rotation angle of the chain link is low. Description of the Drawings

[0031] Figure 1 is a three-dimensional view of the present invention;

[0032] Figure 2 is a schematic structural view of the chain link of the present invention;

[0033] Figure 3 is a front cross-sectional view of the present invention;

[0034] Figure 4 is a schematic structural view of part A of the present invention;

[0035] Figure 5 is a schematic structural view of the first electric telescopic unit of the present invention;

[0036] Figure 6 is a schematic structural view of the lifting ring of the present invention;

[0037] Figure 7 is a side cross-sectional view of the lifting ring and the grid frame of the present invention;

[0038] Figure 8 is a schematic structural view of the installation frame of the present invention;

[0039] Figure 9 is a schematic structural view of the second transparent box of the present invention;

[0040] Figure 10 is a schematic control flow diagram of the present invention;

[0041] Figure 11 is a flow chart of the usage method of the present invention.

[0042] In the figure: 1. Link; 2. First heat insulation cotton; 3. First temperature detection unit; 4. First heating unit; 5. Connecting rod; 6. Bolt; 7. Sealing ring; 8. Connection frame; 9. Second heat insulation cotton; 10. Spherical plain bearing; 11. Swing rod; 12. First buffer spring; 13. First electric telescopic unit; 15. Lifting ring; 16. Storage groove; 17. First pressure detection unit; 18. Second buffer spring; 19. Moving rod; 20. Mounting block; 21. Pressing wheel; 22. Mesh frame; 23. Silica gel desiccant; 24. Second heating unit; 25. Humidity detection unit; 26. Mounting frame; 27. Second pressure detection unit; 28. Third buffer spring; 29. Buffer plate; 30. First transparent box; 31. First distance measurement unit; 32. Storage box; 33. Second electric telescopic unit; 34. First wiping plate; 35. Central processing unit; 36. Second transparent box; 37. Second distance measurement unit; 38. Mounting plate; 39. Third electric telescopic unit; 40. Second wiping plate; 41. Second temperature detection unit; 42. Logic control sub-unit; 43. Micro control unit. Detailed implementation manners

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0044] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "provided with", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0046] Please refer toFigure 1 , Figure 2 , Figure 3 and Figure 4 , an embodiment provided by the present invention: a rapid stress-relieving elevator compensating chain;

[0047] It includes a link 1, a connecting frame 8. A connecting rod 5 is movably installed through the inside of the link 1. The connecting frame 8 is located outside the connecting rod 5. A joint bearing 10 is installed through the bottom of the connecting frame 8. A swing rod 11 is installed inside the joint bearing 10. The bottom of the swing rod 11 is connected to the top of another link 1 below. A first heat insulation cotton 2 is installed on the outside of the link 1. Sealing rings 7 are symmetrically installed on the outside of the connecting rod 5, and the sealing rings 7 are located on both sides of the connecting frame 8. A second heat insulation cotton 9 is installed on the outside of the connecting frame 8. Bolts 6 are symmetrically installed through the front of the link 1. A plurality of first buffer springs 12 are symmetrically installed at the bottom of the connecting frame 8, and one end of the first buffer spring 12 is connected to the top of the link 1. The link 1 can provide an installation position for other components of the device. At the same time, a plurality of links 1 are connected to each other through the connecting frame 8 and the connecting rod 5 to form a compensating chain. The first heat insulation cotton 2 plays a role in heat preservation, reducing the heat loss in the link 1. The connecting rod 5 plays a role in connecting the connecting frame 8 and the link 1. The bolt 6 can squeeze and fix the connecting rod 5 by rotation. The connecting frame 8 can provide an installation position for the joint bearing 10. The joint bearing 10 can provide an installation position for the swing rod 11. At the same time, the joint bearing 10 can enable the swing rod 11 to swing back and forth, left and right. The swing rod 11 plays a role in connecting the joint bearing 10 and the link 1. The second heat insulation cotton 9 plays a role in heat preservation, reducing the heat loss in the connecting frame 8. The first buffer spring 12 can apply a restoring force to the swinging link 1, making the swinging link 1 automatically straighten.

[0048] Please refer to Figure 1 and Figure 2 , an embodiment provided by the present invention: a rapid stress-relieving elevator compensating chain;

[0049] It includes a temperature control unit. The temperature control unit is arranged inside the link 1 to prevent the temperature of the link 1 from being too low. The temperature control unit includes a first temperature detection unit 3 and a first heating unit 4. Two first temperature detection units 3 are symmetrically installed on the inside of the link 1. Two first heating units 4 are symmetrically installed through the top of the link 1. The first temperature detection unit 3 is a temperature sensor, which can detect the temperature of the link 1 and transmit the temperature information to the micro control unit 43. The first heating unit 4 is a heating rod, which can convert electrical energy into heat energy, so as to heat the link 1.

[0050] Please refer to Figure 1 , Figure 5 , Figure 6 and Figure 7, an embodiment provided by the present invention: a lift compensation chain for quickly eliminating stress;

[0051] It includes a stress elimination unit which is arranged on the outer side of the link 1 and is used to quickly eliminate the swing of the link 1 parallel to the plane where the lift and the counterweight are located. The stress elimination unit includes a first electric telescopic unit 13, a lifting ring 15, a first pressure detection unit 17, a second buffer spring 18, a moving rod 19, a mounting block 20 and a pressing wheel 21. Two first electric telescopic units 13 are symmetrically installed on both sides of the link 1. The output end of the first electric telescopic unit 13 is installed with a lifting ring 15. The inner walls of the back and front of the lifting ring 15 are symmetrically provided with receiving grooves 16. The front inner wall of the front receiving groove 16 is installed with a first pressure detection unit 17. The input end of the first pressure detection unit 17 is installed with a third buffer spring 28. One end of the third buffer spring 28 is installed with a moving rod 19. The back of the moving rod 19 is symmetrically installed with mounting blocks 20. The inner sides of the mounting blocks 20 are movably installed through the pressing wheel 21. The first electric telescopic unit 13 is an electric telescopic rod, which can convert electrical energy into kinetic energy, thereby driving the lifting ring 15 to move up and down. The lifting ring 15 can drive the pressing wheel 21 to move up and down by moving up and down. The receiving groove 16 can provide a receiving space for the moving rod 19. The first pressure detection unit 17 is a pressure sensor, which can detect the pressure of the pressing wheel 21 on the link 1 and can transmit the pressure information to the micro control unit 43 at the same time. The second buffer spring 18 plays a buffering role, which can buffer the pressure received by the moving rod 19 and can transmit the pressure received by the moving rod 19 to the first pressure detection unit 17 at the same time. The moving rod 19 can provide an installation position for the mounting block 20. The moving rod 19 can move back and forth, so that the pressing wheel 21 can move back and forth. The mounting block 20 can provide an installation position for the pressing wheel 21. The pressing wheel 21 can extrude and limit the link 1 and can transmit the pressure from the link 1 to the mounting block 20, and then to the moving rod 19.

[0052] Please refer to Figure 1 , Figure 5 and Figure 7 , an embodiment provided by the present invention: a lift compensation chain for quickly eliminating stress;

[0053] It includes a moisture absorption unit which is arranged on the front of the stress elimination unit and used to absorb moisture in the air. The moisture absorption unit includes a grid frame 22, silica gel desiccant 23, a second heating unit 24, a humidity detection unit 25 and a second temperature detection unit 41. The grid frame 22 is installed on the front of the lifting ring 15. Inside the grid frame 22, the silica gel desiccant 23 is installed. Inside the grid frame 22, the second heating unit 24 is installed and the second heating unit 24 is located inside the silica gel desiccant 23. On the front inner wall of the grid frame 22, the humidity detection unit 25 is installed. On the front inner wall of the grid frame 22, the second temperature detection unit 41 is installed. The grid frame 22 can provide an installation position for the silica gel desiccant 23 so that the silica gel desiccant 23 has a position to be installed. The silica gel desiccant 23 can absorb moisture in the air. The second heating unit 24 is a heating rod which can convert electrical energy into heat energy to heat the silica gel desiccant 23 so that the moisture in the silica gel desiccant 23 is dried. The humidity detection unit 25 is a humidity sensor which can detect the humidity in the silica gel desiccant 23 and transmit the humidity information to the micro control unit 43. The second temperature detection unit 41 is a temperature sensor which can detect the temperature of the silica gel desiccant 23 and transmit the temperature information to the micro control unit 43.

[0054] Please refer to Figure 1 、 Figure 5 、 Figure 6 and Figure 8 and

[0055] Including an anti-bottom-collision unit, the anti-bottom-collision unit is used to reduce the damage caused by the collision of the bottom of the compensation chain. The anti-bottom-collision unit includes a mounting frame 26, a second pressure detection unit 27, a third buffer spring 28, a buffer plate 29, a first transparent box 30, a first distance measurement unit 31, a storage box 32, a second electric telescopic unit 33 and a first cleaning plate 34. The mounting frame 26 is installed on the back of the lifting ring 15. The inner wall of the front of the mounting frame 26 is installed with the second pressure detection unit 27. The input end of the second pressure detection unit 27 is installed with the third buffer spring 28. One end of the third buffer spring 28 is installed with the buffer plate 29. The top of the mounting frame 26 is installed with the first transparent box 30. The first distance measurement unit 31 is installed inside the first transparent box 30. The top of the first transparent box 30 is installed with the storage box 32. The inner wall of the top of the storage box 32 is installed with the second electric telescopic unit 33. The output end of the second electric telescopic unit 33 is installed with the first cleaning plate 34. The mounting frame 26 can provide guidance for the buffer plate 29 and can also provide an installation position for the second pressure detection unit 27. The second pressure detection unit 27 is a pressure sensor, which can detect the pressure information received by the buffer plate 29 and transmit the pressure information to the micro-control unit 43. The third buffer spring 28 plays a buffering role, which can buffer the force received by the buffer plate 29 and transmit the force received by the buffer plate 29 to the second pressure detection unit 27. The first transparent box 30 can provide an installation position for the first distance measurement unit 31. The first distance measurement unit 31 is a laser rangefinder, which can measure the distance between the object on the back of the chain link 1 and the first distance measurement unit 31 and transmit the distance information to the micro-control unit 43. The storage box 32 can provide an installation position for the second electric telescopic unit 33 and can also provide a storage space for the first cleaning plate 34. The second electric telescopic unit 33 can convert electrical energy into kinetic energy, thereby driving the first cleaning plate 34 to move up and down. The first cleaning plate 34 can wipe the dust on the back of the first transparent box 30 clean by moving up and down.

[0056] Please refer to Figure 1 , Figure 5 , Figure 6 and Figure 9 , an embodiment provided by the present invention: a fast stress-relieving elevator compensation chain;

[0057] It includes a side collision prevention unit which is used to prevent the two sides of the compensation chain from being damaged by collision. The side collision prevention unit includes a second transparent box 36, a second distance measuring unit 37, a mounting plate 38, a third electric telescopic unit 39 and a second wiping plate 40. The two second transparent boxes 36 are symmetrically installed on the top of the lifting ring 15. The second distance measuring unit 37 is installed inside the second transparent box 36. The mounting plate 38 is installed on the top of the second transparent box 36. A third electric telescopic unit 39 is installed on one side of the mounting plate 38. The output end of the third electric telescopic unit 39 is installed with the second wiping plate 40. The second transparent box 36 can provide an installation position for the second distance measuring unit 37. The second distance measuring unit 37 is a laser rangefinder and can measure the distance between the objects on both sides of the chain link 1 and the second distance measuring unit 37. The mounting plate 38 can provide an installation position for the third electric telescopic unit 39 so that the third electric telescopic unit 39 has a position for installation. The third electric telescopic unit 39 can convert electrical energy into kinetic energy, thereby driving the second wiping plate 40 to move back and forth. The second wiping plate 40 can wipe the dust on one side of the second transparent box 36 clean by moving back and forth.

[0058] Please refer to Figure 1 、 Figure 5 、 Figure 6 and Figure 10 An embodiment provided by the present invention: A fast stress-relieving elevator compensation chain;

[0059] It includes a central processing unit 35 which is used to control the operation of the power components of the compensation chain. The central processing unit 35 includes a logic control sub-unit 42 and a micro-control unit 43. The central processing unit 35 is installed on the front of the mounting frame 26. The micro-control unit 43 is electrically connected to the first temperature detection unit 3, the first heating unit 4, the first electric telescopic unit 13, the first pressure detection unit 17, the second heating unit 24, the humidity detection unit 25, the second pressure detection unit 27, the first distance measuring unit 31, the second electric telescopic unit 33, the second distance measuring unit 37, the third electric telescopic unit 39 and the second temperature detection unit 41. The logic control sub-unit 42 is used to judge the signals received by the micro-control unit 43 and issue the judgment results at the same time. The logic control sub-unit 42 can judge the temperature information, humidity information and distance received by the micro-control unit 43 and can issue the judgment data to the micro-control unit 43. After receiving the data issued by the logic control sub-unit 42, the micro-control unit 43 controls the first heating unit 4, the first electric telescopic unit 13, the second heating unit 24, the second electric telescopic unit 33 and the third electric telescopic unit 39.

[0060] The usage method of the fast stress-relieving elevator compensation chain is as follows:

[0061] S1. Connect the vertically adjacent link rings 1 through the connecting rod 5 and the connecting frame 8. After connecting multiple link rings 1, a compensating chain is formed. The first temperature detection unit 3 detects the ambient temperature. After the logic control sub-unit 42 determines that the ambient temperature is lower than the set value, the micro-control unit 43 controls the first heating unit 4 to heat the link rings 1 until the first temperature detection unit 3 detects that the temperature of the link rings 1 reaches the specified value;

[0062] S2. The silica gel desiccant 23 absorbs the moisture in the surrounding environment to reduce the rust phenomenon caused by the erosion of components such as the link rings 1 by moisture. The humidity detection unit 25 detects the humidity of the silica gel desiccant 23. After the logic control sub-unit 42 determines that the humidity of the silica gel desiccant 23 is higher than the set value, the micro-control unit 43 controls the second heating unit 24 to heat the silica gel desiccant 23 until the humidity detection unit 25 detects that the humidity of the silica gel desiccant 23 is lower than the set value;

[0063] S3. When the data measured by the first distance measurement unit 31 and the second pressure detection unit 27 are normal, the micro-control unit 43 controls the first electric telescopic unit 13 to drive the lifting ring 15 to move downward, so that the pressing wheel 21 exerts an elastic pressure on the front and rear of the link ring 1, making the swing of the link ring 1 in the front and rear directions gradually smaller, thereby reducing the swing amplitude of the compensating chain during the up and down movement of the elevator and the counterweight, and further reducing the phenomenon of uneven counterweight caused by the swing of the compensating chain, increasing the stability of the elevator. At the same time, the first pressure detection unit 17 detects the pressure of the pressing wheel 21 on the link ring 1. When the logic control sub-unit 42 determines that the pressure of the first pressure detection unit 17 increases, the micro-control unit 43 controls the first electric telescopic unit 13 to drive the lifting ring 15 to move upward. When the logic control sub-unit 42 determines that the pressure of the first pressure detection unit 17 decreases, the micro-control unit 43 controls the first electric telescopic unit 13 to drive the lifting ring 15 to move downward;

[0064] S4. When the back of the link ring 1 of the compensating chain faces the ground, the first distance measurement unit 31 detects the distance between the object on the ground and the first distance measurement unit 31. After the logic control sub-unit 42 determines that the data measured by the first distance measurement unit 31 is lower than the set value, the micro-control unit 43 controls the first electric telescopic unit 13 to drive the lifting ring 15 to move upward, so that the pressing wheel 21 on the lifting ring 15 cancels the rotation restriction on the link ring 1, making the link ring 1 have a larger rotation angle in the front and rear directions, and avoiding damage caused by excessive stress between the components of the link ring 1 due to the inability to rotate due to low front and rear rotation angles of the link ring 1 caused by collision;

[0065] S5. Measure the distances from the objects on both sides of the link 1 to the second distance measuring unit 37 through the second distance measuring unit 37. When the logic control subunit 42 determines that the measured distance is lower than the set value, control the first electric telescopic unit 13 through the micro control unit 43 to drive the lifting ring 15 to move upward, so that the pressing wheel 21 on the lifting ring 15 cancels the rotation restriction on the link 1, enabling the link 1 to have a larger rotation angle in the left and right directions, and avoiding damage caused by excessive stress between the components of the link 1 due to the inability to rotate caused by low left and right rotation angles of the link 1 due to collisions.

[0066] The following steps are further included in S4:

[0067] S41. When the collision speed between the back surface of the link 1 and the ground is too fast, the buffer plate 29 first contacts the ground, and the third buffer spring 28 buffers the collision of the buffer plate 29 to reduce the damage to the link 1 caused by the collision. At the same time, the second pressure detection unit 27 transmits the pressure received by the buffer plate 29 to the micro control unit 43. When the logic control subunit 42 determines that the pressure measured by the second pressure detection unit 27 is too large, the micro control unit 43 controls the first electric telescopic unit 13 to drive the lifting ring 15 to move upward, and further enables the pressing wheel 21 on the lifting ring 15 to cancel the rotation restriction on the link 1, enabling the link 1 to have a larger rotation angle in the front and back directions, and avoiding damage caused by excessive stress between the components of the link 1 due to the inability to rotate caused by low front and back rotation angles of the link 1 due to collisions.

[0068] Working principle: Before using the elevator compensation chain for rapid stress relief, it is necessary to first check whether there are any problems affecting its use. First, connect the adjacent upper and lower link rings 1 through the connecting rod 5 and the connecting frame 8. After connecting multiple link rings 1, a compensation chain is formed. The first temperature detection unit 3 detects the ambient temperature. After the logic control sub-unit 42 determines that the ambient temperature is lower than the set value, the micro-control unit 43 controls the first heating unit 4 to heat the link ring 1 until the first temperature detection unit 3 detects that the temperature of the link ring 1 reaches the specified value, so as to avoid the situation where the cold brittleness of the link ring 1 increases and it breaks due to too low temperature. The silica gel desiccant 23 absorbs the moisture in the surrounding environment, reducing the corrosion phenomenon caused by the erosion of moisture on components such as the link ring 1. The humidity detection unit 25 detects the humidity of the silica gel desiccant 23. After the logic control sub-unit 42 determines that the humidity of the silica gel desiccant 23 is higher than the set value, the micro-control unit 43 controls the second heating unit 24 to heat the silica gel desiccant 23 until the humidity detection unit 25 detects that the humidity of the silica gel desiccant 23 is lower than the set value. When the data measured by the first distance measurement unit 31 and the second pressure detection unit 27 are normal, the micro-control unit 43 controls the first electric telescopic unit 13 to drive the lifting ring 15 to move downward, so that the pressure wheel 21 exerts elastic pressure on the front and rear of the link ring 1, making the swing of the link ring 1 in the front and rear directions gradually smaller. At the same time, the first pressure detection unit 17 detects the pressure of the pressure wheel 21 on the link ring 1. When the logic control sub-unit 42 determines that the pressure of the first pressure detection unit 17 increases, the micro-control unit 43 controls the first electric telescopic unit 13 to drive the lifting ring 15 to move upward. When the logic control sub-unit 42 determines that the pressure of the first pressure detection unit 17 decreases, the micro-control unit 43 controls the first electric telescopic unit 13 to drive the lifting ring 15 to move downward. When the back of the link ring 1 of the compensation chain faces the ground, the first distance measurement unit 31 detects the distance between the object on the ground and the first distance measurement unit 31. After the logic control sub-unit 42 determines that the data measured by the first distance measurement unit 31 is lower than the set value, the micro-control unit 43 controls the first electric telescopic unit 13 to drive the lifting ring 15 to move upward, so that the pressure wheel 21 on the lifting ring 15 cancels the rotation restriction on the link ring 1, making the link ring 1 have a larger rotation angle in the front and rear directions, avoiding damage caused by excessive stress between the components of the link ring 1 due to too low rotation angle in the front and rear directions of the link ring 1 and being unable to rotate when being collided. When the collision speed between the back of the link ring 1 and the ground is too fast, the buffer plate 29 first contacts the ground, and the third buffer spring 28 buffers the collision of the buffer plate 29, reducing the damage to the link ring 1 caused by the collision. At the same time, the second pressure detection unit 27 transmits the pressure received by the buffer plate 29 to the micro-control unit 43. When the logic control sub-unit 42 determines that the pressure measured by the second pressure detection unit 27 is too large, the micro-control unit 43 controls the first electric telescopic unit 13 to drive the lifting ring 15 to move upward,Furthermore, the rotation restriction of the chain link 1 by the pressing wheel 21 on the lifting ring 15 is cancelled, enabling the chain link 1 to have a larger rotation angle in the front-back direction, avoiding damage caused by excessive stress between components of the chain link 1 due to the inability to rotate caused by low front-back rotation angle and collision. The distance between the objects on both sides of the chain link 1 and the second distance measuring unit 37 is measured by the second distance measuring unit 37. When the logic control sub-unit 42 determines that the measured distance is lower than the set value, the first electric telescopic unit 13 is controlled by the micro control unit 43 to drive the lifting ring 15 to move upward, thereby cancelling the rotation restriction of the chain link 1 by the pressing wheel 21 on the lifting ring 15, enabling the chain link 1 to have a larger rotation angle in the left-right direction, and avoiding damage caused by excessive stress between components of the chain link 1 due to the inability to rotate caused by low left-right rotation angle and collision.

[0069] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention, and any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. An elevator compensation chain for rapid stress relief, characterized in that: The invention comprises a chain link (1), a connecting frame (8), a stress relief unit, a temperature control unit, an anti-collision unit, a moisture absorption unit and a central processing unit (35), wherein the anti-collision unit comprises a bottom collision prevention unit and a side collision prevention unit, wherein a connecting rod (5) is movably installed through the inner side of the chain link (1), the connecting frame (8) is located on the outer side of the connecting rod (5), a joint bearing (10) is installed through the bottom of the connecting frame (8), a swing rod (11) is installed inside the joint bearing (10), and the bottom of the swing rod (11) is connected to the top of another chain link (1) below; The stress relief unit is arranged on the outside of the chain link (1) to quickly eliminate the swing of the chain link (1) parallel to the surface where the elevator and the counterweight are located; the temperature control unit is arranged inside the chain link (1) to prevent the temperature of the chain link (1) from being too low; the bottom collision prevention unit is used to reduce the damage caused by the bottom of the compensation chain by collision; the side collision prevention unit is used to prevent the two sides of the compensation chain from being damaged by collision; the moisture absorption unit is arranged on the front of the stress relief unit to absorb moisture in the air; and the central processing unit (35) is used to control the operation of the power components of the compensation chain; The stress relief unit comprises a first electric telescopic unit (13), a lifting ring (15), a first pressure detection unit (17), a second buffer spring (18), a moving rod (19), a mounting block (20) and a pressure wheel (21). The two first electric telescopic units (13) are symmetrically mounted on both sides of the chain ring (1). The output end of the first electric telescopic unit (13) is mounted with a lifting ring (15). The back inner wall and the front inner wall of the lifting ring (15) are symmetrically provided with a storage groove (16). The front inner wall of the front storage groove (16) is mounted with a first pressure detection unit (17). The input end of the first pressure detection unit (17) is mounted with a third buffer spring (28). One end of the third buffer spring (28) is mounted with a moving rod (19). The back of the moving rod (19) is symmetrically mounted with a mounting block (20). The inner side of the mounting block (20) is penetrated by a pressure wheel (21) that is movably mounted.

2. The elevator compensating chain for rapid stress relief according to claim 1, characterized in that: The outer side of the chain link (1) is installed with a first heat insulating cotton (2), the outer side of the connecting rod (5) is symmetrically installed with a sealing ring (7), and the sealing ring (7) is located on both sides of the connecting frame (8), and the outer side of the connecting frame (8) is installed with a second heat insulating cotton (9), the front side of the chain link (1) is symmetrically penetrated by bolts (6), and the bottom of the connecting frame (8) is symmetrically installed with a plurality of first buffer springs (12), and one end of the first buffer spring (12) is connected to the top of the chain link (1).

3. The elevator compensating chain for rapid stress relief according to claim 2, characterized in that: The temperature control unit comprises a first temperature detection unit (3) and a first heating unit (4), wherein two first temperature detection units (3) are symmetrically mounted on the inner side of the chain ring (1), and two first heating units (4) are symmetrically mounted through the top of the chain ring (1).

4. The elevator compensating chain for rapid stress relief according to claim 3, characterized in that: The moisture absorption unit comprises a grid frame (22), a silica gel desiccant (23), a second heating unit (24), a humidity detection unit (25) and a second temperature detection unit (41); the grid frame (22) is mounted on the front side of the lifting ring (15); the silica gel desiccant (23) is mounted inside the grid frame (22); the second heating unit (24) is mounted inside the grid frame (22), and the second heating unit (24) is located inside the silica gel desiccant (23); the humidity detection unit (25) is mounted on the front inner wall of the grid frame (22); and the second temperature detection unit (41) is mounted on the front inner wall of the grid frame (22).

5. The elevator compensating chain for rapid stress relief according to claim 4, characterized in that: The bottom collision prevention unit comprises a mounting frame (26), a second pressure detection unit (27), a third buffer spring (28), a buffer plate (29), a first transparent box (30), a first distance measuring unit (31), a storage box (32), a second electric telescopic unit (33) and a first wiping plate (34). The mounting frame (26) is mounted on the back of the lifting ring (15); the second pressure detection unit (27) is mounted on the front inner wall of the mounting frame (26); the third buffer spring (28) is mounted at the input end of the second pressure detection unit (27); the buffer plate (29) is mounted at one end of the third buffer spring (28); the first transparent box (30) is mounted on the top of the mounting frame (26); the first distance measuring unit (31) is mounted inside the first transparent box (30); the storage box (32) is mounted on the top of the first transparent box (30); the second electric telescopic unit (33) is mounted on the top inner wall of the storage box (32); and the first wiping plate (34) is mounted on the output end of the second electric telescopic unit (33).

6. The elevator compensating chain for rapid stress relief according to claim 5, characterized in that: The side collision prevention unit comprises a second transparent box (36), a second distance measuring unit (37), a mounting plate (38), a third electric telescopic unit (39) and a second wiper (40), wherein the two second transparent boxes (36) are symmetrically mounted on the top of the lifting ring (15), the second distance measuring unit (37) is mounted inside the second transparent box (36), the mounting plate (38) is mounted on the top of the second transparent box (36), the third electric telescopic unit (39) is mounted on one side of the mounting plate (38), and the second wiper (40) is mounted on the output end of the third electric telescopic unit (39).

7. The elevator compensating chain for rapid stress relief according to claim 6, characterized in that: The central processing unit (35) comprises a logic control subunit (42) and a micro control unit (43). The central processing unit (35) is mounted on the front of the mounting frame (26). The micro control unit (43) is connected to the first temperature detection unit (3), the first heating unit (4), the first electric telescopic unit (13), the first pressure detection unit (17), the second heating unit (24), the humidity detection unit (25), the second pressure detection unit (27), the first distance measuring unit (31), the second electric telescopic unit (33), the second distance measuring unit (37), the third electric telescopic unit (39) and the second temperature detection unit (41) via electrical signals. The logic control subunit (42) is used to judge the signal received by the micro control unit (43) and to send the judgment result.

8. The method for using a fast stress-relieving elevator compensation chain according to claim 7, characterized in that: The method of using the elevator compensation chain for rapid stress relief is as follows: S1, connecting the upper and lower adjacent chain links (1) through a connecting rod (5) and a connecting frame (8), so that a plurality of chain links (1) are connected to form a compensation chain, detecting the ambient temperature through a first temperature detection unit (3), and after the logic control subunit (42) determines that the ambient temperature is lower than a set value, the microcontrol unit (43) controls the first heating unit (4) to heat the chain link (1) until the first temperature detection unit (3) detects that the temperature of the chain link (1) reaches a specified value; S2, absorbing moisture in the surrounding environment through the silica gel desiccant (23) to reduce the rust phenomenon caused by moisture erosion on the chain link (1) and other components, detecting the humidity of the silica gel desiccant (23) through the humidity detection unit (25), and after the logic control subunit (42) determines that the humidity of the silica gel desiccant (23) is higher than a set value, the micro control unit (43) controls the second heating unit (24) to heat the silica gel desiccant (23) until the humidity detection unit (25) detects that the humidity of the silica gel desiccant (23) is lower than the set value; S3, when the data measured by the first distance measuring unit (31) and the second pressure detection unit (27) are normal, the micro control unit (43) controls the first electric telescopic unit (13) to drive the lifting ring (15) to move downward, so that the pressure wheel (21) applies elastic pressure to the front and rear of the chain ring (1), so that the swing of the chain ring (1) in the front direction becomes smaller, and at the same time, the first pressure detection unit (17) detects the pressure of the pressure wheel (21) on the chain ring (1), and when the logic control subunit (42) determines that the pressure of the first pressure detection unit (17) increases, the micro control unit (43) controls the first electric telescopic unit (13) to drive the lifting ring (15) to move upward, and when the logic control subunit (42) determines that the pressure of the first pressure detection unit (17) decreases, the micro control unit (43) controls the first electric telescopic unit (13) to drive the lifting ring (15) to move downward; S4, when the back side of the link (1) of the compensation chain faces the ground, the first distance measuring unit (31) detects the distance of an object on the ground from the first distance measuring unit (31), and after the logic control subunit (42) determines that the data measured by the first distance measuring unit (31) is lower than a set value, the micro control unit (43) controls the first electric telescopic unit (13) to drive the lifting ring (15) to move upward, so that the pressure wheel (21) on the lifting ring (15) cancels the rotation restriction on the link (1), so that the link (1) has a larger rotation angle in the front-to-back direction, thereby avoiding damage caused by excessive stress between various components of the link (1) due to the low front-to-back rotation angle of the link (1) causing the link (1) to be unable to rotate due to collision; S5. The distances of the objects on both sides of the chain link (1) from the second distance measuring unit (37) are measured by the second distance measuring unit (37). When the logic control subunit (42) determines that the measured distance is lower than the set value, the micro control unit (43) controls the first electric telescopic unit (13) to drive the lifting ring (15) to move upward, thereby causing the pressure wheel (21) on the lifting ring (15) to cancel the rotation restriction on the chain link (1), so that the chain link (1) has a larger rotation angle in the left and right directions, thereby avoiding damage caused by excessive stress between the components of the chain link (1) due to the low left and right rotation angle of the chain link (1) causing the chain link (1) to be unable to rotate due to collision.

9. The method for using an elevator compensation chain for rapid stress relief according to claim 8, characterized in that: The step S4 also includes the following steps: S41. When the collision speed between the back of the chain link (1) and the ground is too fast, the buffer plate (29) first contacts the ground, and the third buffer spring (28) buffers the collision of the buffer plate (29), thereby reducing the damage to the chain link (1) caused by the collision. At the same time, the second pressure detection unit (27) transmits the pressure exerted on the buffer plate (29) to the micro control unit (43). When the logic control subunit (42) determines that the pressure measured by the second pressure detection unit (27) is too large, the micro control unit (43) controls the first electric telescopic unit (13) to drive the lifting ring (15) to move upward, thereby causing the pressure wheel (21) on the lifting ring (15) to cancel the rotation restriction on the chain link (1), so that the chain link (1) has a larger rotation angle in the front-to-back direction, thereby avoiding damage caused by excessive stress between the components of the chain link (1) due to the low front-to-back rotation angle of the chain link (1) being unable to rotate due to collision.

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