CN114084766B - Unloading and variable-resistance shock absorption structure for steel wire rope - Google Patents

Abstract

The invention discloses an unloading and variable-resistance shock absorption structure for a steel wire rope. The device comprises a fixed module and a movable module, wherein the movable module is sleeved in the fixed module through a square sliding rod to realize relative sliding. One end of the fixed module is provided with a fixed electromagnet, one end of the movable module is provided with a movable electromagnet, the other end of the movable module is provided with a movable pulley, and the movable pulley plays a role of a tension pulley; an external object contacts and pushes the movable module to move relative to the fixed module, so that the movable module is driven to move in a variable resistance manner, and unloading and variable resistance shock absorption of the steel wire rope are realized; when the external object is not in contact with the moving module, the tensioning of the steel wire rope is realized. The invention has the functions of variable resistance shock absorption, unloading, double unloading, rebound prevention and automatic resetting.

Description

An unloading and variable resistance shock absorbing structure for wire rope

technical field

The invention relates to a rope force unloading and object buffering and shock absorbing structure, in particular to a structure that also has variable resistance shock absorbing for moving objects during the unloading process.

Background technique

In the field of transmission, common transmission methods include screw drive, sprocket drive, wire rope drive, belt drive, etc. Among them, wire rope drives are widely used in occasions with large loads and long strokes, such as elevator lifts and crane loads.

Taking elevator take-off and landing as an example, in order to improve the safety of the elevator, multiple steel wire solutions are often used in the elevator scheme and accompanied by complex electronic control procedures to prevent the elevator from falling when it fails.

However, these protective measures are not foolproof. At present, there are still accidents of elevator falling in China. What's more serious is that once the elevator falls, the passengers will face serious danger to their lives.

At the same time, the protective measures in the field are almost all concentrated in the preventive field, that is: how to prevent the elevator from falling; and once these preventive measures fail, once the elevator falls, how to protect the passengers during the falling process. Lack of corresponding follow-up protection programs.

SUMMARY OF THE INVENTION

Aiming at the deficiencies of the prior art, especially for the elevator falling process, the purpose of the present invention is to provide an unloading and variable resistance shock absorbing structure for wire ropes, including multiple functions of shock absorption, unloading, rebound prevention, and automatic reset , which can be used to provide a soft variable resistance shock absorption buffer process, and realize the motion buffer of heavier objects.

In order to solve the above problems, the technical scheme of the present invention is:

The unloading and variable resistance shock absorption structure includes a fixed module and a mobile module, the mobile module is movably sleeved on the fixed module, one end of the mobile module is connected with a wire rope, and the other end is suspended or subjected to impact and extrusion from external objects; the external objects contact and push the mobile module. It moves relative to the fixed module and drives the mobile module to move with variable resistance to realize the unloading of the wire rope, thereby realizing variable resistance shock absorption; when the external object does not contact the mobile module, the wire rope is tensioned.

The fixed module includes two DC power sources, a fixed electromagnet and two sets of conductive plate groups; the fixed electromagnet includes a fixed sleeve and a fixed conductive coil, and the fixed conductive coil is wound on the fixed sleeve; the two sets of conductive plate groups are arranged in parallel and adjacent to each other. Each group of conductive plates is composed of two conductive plates facing each other in parallel and spaced apart; both ends of the fixed conductive coil are respectively connected to two conductive plates in a group of conductive plates, and one end of the fixed conductive coil is connected to the conductive plate. A DC power supply is connected in series;

The moving module includes a sliding rod, a moving pulley, a resistance component and a moving electromagnet; one end of the sliding rod is movably passed through the fixed sleeve and a moving electromagnet is arranged, and the middle of the sliding rod is located in the two conductive plates of the two sets of conductive plates of the fixed module. Between the plates, a ring-shaped resistance component is fixedly sleeved on the middle of the sliding rod, and the two sides of the resistance component are respectively electrically connected to the two conductive plates of at least one group of the conductive plate groups, so that the two conductive plates are connected to each other, and the other side of the sliding rod is electrically connected. A movable pulley is hingedly installed on one end, and the wire rope is wound around the movable pulley; the moving electromagnet includes a circular ring sleeve and a movable conductive coil, the circular ring sleeve is fixed on the end of the sliding rod after movably passing through the fixed sleeve, and the movable conductive coil is wound on the circular ring sleeve. Coil; both ends of the moving conductive coil are respectively connected to two conductive plates in another group of conductive plates, and another DC power supply is connected in series between one end of the moving conductive coil and the conductive plates.

The directions of the magnetic fields generated by the stationary conductive coil and the moving conductive coil are opposite to each other after being energized.

The fixed conductive coil and the movable conductive coil are spirally wound in the same direction, and the current directions are opposite.

The conductive plate group connected to the moving conductive coil is arranged closer to the wire rope and the movable pulley than the conductive plate group connected to the fixed conductive coil.

The resistance assembly is composed of a plurality of resistance plates, the plurality of resistance plates are fixedly sleeved on the sliding rod at intervals, and the two sides of at least one resistance plate in the resistance assembly are respectively electrically connected to a group of conductive plate groups connected to the fixed conductive coil. two conductive plates, so that the two conductive plates are connected to each other.

The overall length of the plurality of resistance plates along the axial direction of the sliding rod is greater than the length of the two conductive plates of a group of conductive plates along the axial direction of the sliding rod, and is smaller than the length of the two conductive plates of a group of conductive plates along the axial direction of the sliding rod twice and the sum of the gaps between the two sets of conductive plates.

The sliding rod moves axially through the fixed sleeve, and drives the resistance components fixed on the sliding rod to move synchronously, and adjusts the number of conductive resistance plates connected between the two conductive plates in the two groups of conductive plates, that is, adjusting The resistance value of the conductive resistance component connected between the two conductive plates in the two groups of conductive plate groups, and then adjust the conduction current generated in the fixed conductive coil and the moving conductive coil, that is, adjust the fixed conductive coil and the moving conductive coil. The generated magnetic field realizes the mutually variable resistance repulsion motion between the fixed module and the mobile module.

The side part of the movable pulley is connected with a pulley baffle plate for limiting the slippage of the wire rope.

The unloading and variable-resistance shock-absorbing structure is used for the buffering of the elevator falling.

The beneficial effects of the method of the present invention:

(1) Heavier objects (such as elevators) can achieve variable resistance shock absorption during the fall process to prevent violent impact and prevent rebound after impact;

(2) During the shock absorption process, the wire rope is unloaded at the same time;

(3) An amplified position detection scheme is designed to achieve high-sensitivity triggering of the model.

The invention has the functions of variable resistance shock absorption, unloading, double unloading, rebound prevention and automatic reset.

Description of drawings

Fig. 1 is the overall appearance view of the unloading and variable resistance shock absorbing structure of the present invention;

Figure 2 is a split view of the unloading and variable resistance shock absorption structure;

Figure 3 is a structural diagram of a fixed module;

Figure 4 is a top view of the fixed module;

Figure 5 is a structural diagram of a fixed electromagnet;

Fig. 6 is a mobile module split diagram;

Fig. 7 is a schematic diagram of the limit state of tensioning the wire rope at the beginning of the unloading and variable resistance shock absorbing structure;

Figure 8 is a schematic diagram of the state where the unloading and variable resistance shock absorbing structure relaxes the wire rope in the state of maximum resistance;

Fig. 9 is a schematic diagram of unloading and variable-resistance shock-absorbing structure loosening the wire rope in a state where the resistance becomes smaller;

Figure 10 is a schematic diagram of the unloading and variable resistance shock-absorbing structure loosening the wire rope in a stable and non-rebound state;

Figure 11 is a schematic diagram of the unloading and variable resistance shock absorbing structure returning to the limit state of tensioning the wire rope;

In the picture: 1 unloading and variable resistance shock absorption structure, 2 fixed module, 3 mobile module, 4 DC power supply, 5 fixed electromagnet, 6 conductive plate, 7 snap bracket, 8 fixed sleeve, 9 fixed conductive coil, 10 sliding rod , 11 moving pulleys, 12 pulley baffles, 13 resistance plates, 14 moving electromagnets, 15 ring sets, 16 moving conductive coils, 17 steel wire ropes, 18 external metal plates.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the following detailed description is given in conjunction with the accompanying drawings and embodiments. It should be understood that the invention examples specifically described herein are only used to explain the present invention, and are not limited to the present invention.

As shown in Figures 1 and 2, the unloading and variable resistance shock absorbing structure 1 includes a fixed module 2 and a mobile module 3. The mobile module 3 is movably sleeved on the fixed module 2. One end of the mobile module 3 is connected to the wire rope 17, and the other end is suspended in the air or accepts external The impact and extrusion of objects; external objects contact and push the mobile module 3 to move relative to the fixed module 2, which drives the mobile module 3 to move with variable resistance, realizes the unloading of the wire rope, and then realizes variable resistance shock absorption; when the external object does not contact the mobile module 3 , to achieve the tension of the wire rope.

Specifically, when the external object does not contact the moving module 3, the moving pulley tightens the wire rope; when the external object hits and drives the moving module 3 to slide, the moving pulley unloads the wire rope. This sliding process is also a variable resistance shock absorption process.

As shown in FIG. 3 and FIG. 4, the fixed module 2 includes two DC power sources 4, a fixed electromagnet 5 and two sets of conductive plate groups; as shown in FIG. 5, the fixed electromagnet 5 includes a fixed sleeve 8 and a fixed conductive coil 9, The fixed sleeve 8 is kept fixed, and the fixed conductive coil 9 is spirally wound on the fixed sleeve 8; The connection lines between the two conductive plates 6 of the conductive plate are the same, and the conductive plates 6 are fixed on the buckle bracket 7; the two ends of the fixed conductive coil 9 are respectively connected to two conductive plates 6 in a group of conductive plates, A DC power supply 4 is connected in series between one end of the fixed conductive coil 9 and the connected conductive plate 6;

The number of the conductive plates 6 is four, which are respectively fixed in the snap brackets 7 . The 4 conductive plates are divided into two groups. The two conductive plates in each group are installed facing each other. The first conductive plate of each group is connected to one electrode of the DC power supply, and the other conductive plate is first connected to the electromagnetic coil, and then connected to the DC power supply. another electrode.

As shown in FIG. 6 , the moving module 3 includes a sliding rod 10, a movable pulley 11, a resistance component and a moving electromagnet 14; There is a moving electromagnet 14, the middle part of the sliding rod 10 is located between the two conductive plates 6 of the two groups of conductive plates of the fixed module 2, the middle part of the sliding rod 10 is fixedly sleeved with a square ring-shaped resistance component, and the resistance component is located in the two groups of conductive plates. Between the two conductive plates 6 of the plate group, the two sides of the resistor assembly are respectively electrically connected to the two conductive plates 6 of at least one of the conductive plate groups, so that the two conductive plates 6 are connected to each other, and the other end of the sliding rod 10 is hinged The movable pulley 11 is installed, the wire rope 17 is wound around the movable pulley 11, and the side of the movable pulley 11 is connected with a pulley baffle 12 for the slipping limit of the wire rope 17; the bottom plane is flush.

The moving electromagnet 14 includes a circular ring sleeve 15 and a movable conductive coil 16. The circular ring sleeve 15 is fixed at the end of the sliding rod 10 movably passing through the fixed sleeve 8, and the circular ring sleeve 15 is spirally wound with a movable conductive coil 16. The ring sleeve 15 is used to connect the external metal plate 18 of the external object; the two ends of the moving conductive coil 16 are respectively connected to the two conductive plates 6 in another group of conductive plates, and one end of the moving conductive coil 16 is connected to the connected conductive plate 6. Another DC power source 4 is connected in series between the boards 6 .

The fixed conductive coil 9 and the movable conductive coil 16 are spirally wound in the same direction, and the current directions are opposite. In the specific implementation, the positive and negative electrodes of the two DC power sources 4 are arranged in opposite directions, so that the electrodes connected to one end of the fixed conductive coil 9 and the moving conductive coil 16 respectively have opposite polarities, so that the currents of the fixed conductive coil 9 and the moving conductive coil 16 are reversed. In the opposite direction.

The external object is the external metal plate 18 , and when the external object 18 strikes and contacts, the external metal plate 18 and the annular sleeve 15 are in contact and connected. An external metal plate is an external object that can refer to a component of an elevator. Taking an elevator as an example, the device of the present invention can be fixed at the bottom of a building, and does not move with the elevator, but only when the elevator falls, the outer metal plate 18 will hit the device, so that the device plays a protective role.

The conductive plate group connected to the moving conductive coil 16 is arranged closer to the wire rope 17 and the movable pulley 11 than the conductive plate group connected to the fixed conductive coil 9 .

The resistance assembly is composed of a plurality of concentrically arranged resistance plates 13, the plurality of resistance plates 13 are fixedly sleeved on the sliding rod 10 at intervals, and the resistance plates 13 are located between the two conductive plates 6 of the two groups of conductive plates. Two sides of a resistance plate 13 are electrically connected to two conductive plates 6 of a group of conductive plates connected to the fixed conductive coil 9 respectively, so that the two conductive plates 6 are connected to each other. Adjacent resistive plates 13 are insulated.

The overall length of the plurality of resistance plates 13 along the axial direction of the sliding rod 10 is greater than the length of the two conductive plates 6 of a group of conductive plates along the axial direction of the sliding rod 10, and is smaller than the length of the two conductive plates 6 of a group of conductive plates along the sliding rod 10. Twice the axial length of the rod 10 and the sum of the gap between the two groups of conductive plates 6 .

The sliding rod 10 moves axially through the fixed sleeve 8, which drives the resistance components fixed on the sliding rod 10 to move synchronously, and adjusts the number of conductive resistance plates 13 connected between the two conductive plates 6 in the two groups of conductive plates. , that is, to adjust the resistance value of the conductive resistance components connected between the two conductive plates 6 in the two groups of conductive plates, and then to adjust the conduction current generated by the fixed conductive coil 9 and the moving conductive coil 16, that is, to adjust the fixed conductive The magnetic field generated by the coil 9 and the moving conductive coil 16 realizes the mutually variable resistance repulsion motion between the fixed module 2 and the moving module 3 .

Therefore, when an external impact drives the mobile module to loosen the wire rope, the two electromagnets of the mobile module and the fixed module realize resistance changes through resistance changes, thereby realizing the variable resistance shock absorption effect. At the same time, the sliding of the mobile module realizes the unloading of the wire rope.

In a specific implementation, the number of resistance plates is 9, and the size and resistance value of each resistance plate are equal. The overall length of the four resistance plates 13 along the axial direction of the sliding rod 10 is equal to the length of the two conductive plates 6 of one set of conductive plate groups along the axial direction of the sliding rod 10, and the interval between the two groups of conductive plate groups along the axial direction of the sliding rod 10 The length is greater than the entire length of one resistance plate 13 along the axial direction of the sliding rod 10 .

The fixed electromagnet 5 is composed of a fixed conductive coil 9 wound on a fixed sleeve 8 , and a square through hole for the sliding rod 10 to pass through is designed at the center of the fixed sleeve 8 . The winding directions of the coils of the fixed electromagnet 5 and the moving electromagnet 14 are the same, and the current directions are opposite.

The material of the sliding rod 10 is insulating material, and the shape is a square long rod. The middle of the sliding rod 10 is provided with a grid-like structure, and there are nine grid gaps, and the size is exactly nine resistance plates.

The two conductive plates in each group are separated by a vertical distance equal to the width of the resistive plates. The distance between the two groups of conductive plates is greater than the thickness of one resistance plate. The length of the conductive plate is equal to the sum of the thickness of the four resistance plates and the three grid gaps.

When the mobile module is in the limit position of tightening the steel wire rope 17, only the resistance plate closest to the steel wire rope 17 is connected to the conductive plate 6 connected to the moving conductive coil 16, and the four resistance plates on the side away from the wire rope 17 are connected to the fixed conductive coil 9. The connected conductive plate;

When the mobile module is in the limit position of unloading and loosening the wire rope 17, only the four resistance plates close to the wire rope 17 are connected to the conductive plate 6 connected to the moving conductive coil 16, and no resistance plate far from the wire rope 17 is connected to the fixed conductive coil 9. conductive plate. At this time, the fixed conductive coil 9 is not energized, no magnetic field is generated, and no repulsive force is generated between the fixed conductive coil 9 and the movable conductive coil 16, so that the mobile module will not bounce.

The specific implementation of the unloading and variable resistance shock absorbing structure 1 is as follows:

The fixed module 2 is used as the fixed end, and the moving module 3 is inserted into the fixed module 2 for assembly.

Among them, there are 4 conductive plates 6 in the fixed module 2, which are respectively numbered as M/U/K/P (FIG. 4). The electromagnetic plate M is installed symmetrically with the electromagnetic plate P, M is connected to the negative pole of the DC power supply 4, P is first connected to the conductive coil 16 of the moving electromagnet 14, and then connected to the positive pole of the DC power supply 4 (Figure 7, Figure 4); The plate U is installed symmetrically with the electromagnetic plate K, U is connected to the positive pole of the DC power supply 4, and K is first connected to the conductive coil 9 of the fixed electromagnet 5, and then connected to the negative pole of the DC power supply 4 (Figure 7, Figure 4). The snap bracket 7 is used to fix the conductive plate 6 (FIG. 4).

Wherein, the two ends of the sliding rod 10 in the mobile module 3 are respectively locked to the movable electromagnet 14 and the movable pulley 11 (FIG. 6). The middle position of the sliding rod 10 is installed with 9 resistance plates 13 (FIG. 6). The mobile module 3 is installed on the symmetrical center of the fixed module 2. Specifically, the sliding rod 10 of the mobile module 3 is inserted into the square hole of the fixed sleeve 8 of the fixed electromagnet 5 of the fixed module 2, and the mobile module 3 can be relative to the fixed module. 2 slides.

In particular, the fixed electromagnet 5 is composed of a conductive coil 9 wound on a fixed sleeve 8, wherein a square through hole is designed in the center of the fixed sleeve 8 (Fig. 3), and the square through hole acts as a "sliding sleeve". The sliding rod 10 of the mobile module 3 is installed therethrough, and the sliding rod 10 is allowed to slide in its square hole.

In particular, the middle part of the sliding rod 10 is in the shape of a grid, and the function is to clamp and install nine resistance boards 13 (FIG. 6).

In particular, the sliding rod 10 is rigidly insulated, and the section of the sliding rod is square, and the cross-sectional size (excluding the grille section) is equal to the size of the square through hole of the fixing sleeve 8, which not only prevents the sliding rod 10 from rotating, but also realizes sliding The rod 10 slides in the square hole of the fixed sleeve 8 .

In particular, the distance between the conductive plate M and the conductive plate P is equal to the width of the resistance plate 13; the distance between the conductive plate U and the conductive plate K is equal to the width of the resistance plate 13, so that with the sliding of the moving module 3, the resistance plate 13 can just be The two groups of conductive plates slide between each other, and during the sliding process, the conductive plates M and P are connected, or the conductive plates U and K are connected.

In particular, the interval between the two groups of conductive plates (ie: the interval between M and U, or the interval between K and P) (FIG. 7) is smaller than the thickness of the single-piece resistance plate 13, thus preventing the same resistance The board 13 is connected to two groups of conductive boards at the same time to cause circuit confusion.

In particular, the length of each conductive plate 6 is equal to the sum of the thickness of the four resistance plates 13 and the three grid spacings, thus ensuring that the same group of conductive plates 6 can only be connected to four resistance plates 13 at the same time.

In particular, when the moving module 3 is at the right limit position (FIG. 7), only one resistive plate 13 connects the conducting plate M and the conducting plate P; at this time, there are four resistive plates 13 connecting the conducting plate U and the conducting plate K.

In particular, when the moving module 3 is at the left limit position (FIG. 10), the moving electromagnet 14 is in contact with the fixed electromagnet 5. At this time, there are 4 resistance plates 13 connecting the conductive plate M and the conductive plate P, and there are no resistance plates. 13 Connect the conductive plate U and the conductive plate K (Fig. 10).

In particular, the winding directions of the coils of the fixed electromagnet 5 and the moving electromagnet 14 are the same, but the current directions are opposite. The beneficial effect of this design is that when both coils are energized, the magnetic poles between the two electromagnets are in opposite directions, and a repulsive force is generated between the two electromagnets.

In particular, each pulley is provided with a pulley baffle 12 (FIG. 6). The pulley baffle is an arc surface structure, and the starting plane of the arc surface is flush with the lower plane of the pulley groove. The effect of this design is that when the wire rope 17 is loose, the wire rope will not completely escape from the pulley groove. scope. When the wire rope 17 is tensioned again, the wire rope can be automatically snapped into the groove of the pulley without manual adjustment.

The principle and process of variable resistance shock absorption:

In the initial position (Fig. 7), there is 1 resistance plate 13 connected to the conductive plates M and P, and the moving electromagnet 14 forms a loop and generates a magnetic force; at the same time, there are 4 resistance plates 13 connected to the conductive plates U and K, and the fixed electromagnet 5 A loop is formed and a magnetic force is generated; and the current direction of the moving electromagnet 14 and the fixed electromagnet 5 are opposite, so a repulsive force is formed between the two. Under the action of the repulsive force, the moving electromagnet 14 drives the entire moving module 2 to slide to the right limit position, especially the movable pulley 11 moves to the right limit position ( FIG. 7 ). At this time, the wire rope 17 is tensioned under the action of the movable pulley 11 (FIG. 7), and at this time, the wire rope is in a normal driving state.

When the outer metal plate 18 (such as the outer frame of the elevator box) rapidly hits the outer end face of the moving electromagnet 14, the moving electromagnet 14 receives the impact and starts to move left; at the same time, the sliding rod 10 drives the moving pulley 11 to move left, and the moving pulley After 11 moves to the left, the wire rope 17 is loosened, so that the tensioning effect is lost, and the unloading is realized (Fig. 8).

In the above impact process, it is divided into three stages:

In the first stage, the sliding rod 10 is moved to the left, the number of the resistance plates 13 connecting the conductive plates U and K is kept at 4, and the resistance plates 13 connecting the conductive plates M and P are increased from 1 to 4 at the initial position. Therefore, in the first stage, the resistance of the fixed electromagnet 5 does not change, the current does not change, and the magnetic force does not change; the resistance of the moving electromagnet 14 decreases, the current increases, and the magnetic force increases; thus, the fixed electromagnet 5 and the moving electromagnet The repulsive force between the irons 14 increases (FIGS. 7 to 8).

In the second stage, the sliding rod 10 continues to move to the left, the resistance plates 13 connecting the conductive plates U and K are reduced from 4 pieces to 1 piece, and the resistance plates connecting the conductive plates M and P remain 4 pieces; in the second stage, The resistance of the moving electromagnet 14 does not change, the current does not change, and the magnetic force does not change; the resistance of the fixed electromagnet 5 increases, the current decreases, and the magnetic force decreases; therefore, in the second stage, the fixed electromagnet 5 and the moving electromagnet 14 The repulsive force between them is reduced (Fig. 8 to Fig. 9).

In the third stage, the sliding rod 10 continues to move to the left limit position, the resistance plate 13 is completely separated from the conductive plate U and the conductive plate K, at this time, the coil of the fixed electromagnet 5 loses current and loses its magnetic force; connect the electromagnetic plate M and the electromagnetic plate The resistance plate 13 of P is kept as 4 pieces, the resistance of the moving electromagnet 14 is unchanged, the current is unchanged, and the magnetic force is unchanged. At this time, no magnetic force acts between the moving electromagnet 14 and the fixed electromagnet 5 . Thus the moving module 2 can be stopped at the left limit position (Fig. 10).

The above process is the shock absorption process after the unloading and variable resistance shock absorbing structure is impacted by the external metal plate 18. During this process, the shock absorbing force first increases, then decreases, and finally decreases to zero, thereby realizing the external object resistance. The variable-resistance damping that first increases and then decreases to zero, and there is no rebound; in addition, the wire rope used for transmission cuts off the driving force due to loosening, avoiding secondary loading.

When the external fault is removed, the external moving object is reset, and at this time, the external metal plate 18 is reset accordingly. At the moment of reset startup, the moving electromagnet 14 has a magnetic force because it is in an electrified state (Fig. 10), which makes the electromagnetic attraction between the moving electromagnet 14 and the external metal plate 18, so under the action of the magnetic force, the moving electromagnet 18 follows move to the right, thereby driving the entire moving module 3 to move to the right (Fig. 11). In the process of continuing to move to the right, the fixed electromagnet 2 restores the current conduction state and restores the magnetic force; the repulsive force between the moving electromagnet 14 and the fixed electromagnet 5 restores, and this repulsion aggravates the right-moving reset of the moving electromagnet 14, and finally makes the mobile module 3Move right to the limit position. At this time, the movable pulley 11 achieves the tensioning effect on the wire rope 17 again, and the driving ability is restored ( FIG. 11 ).

In particular, all the above processes have achieved special beneficial effects: when the external object fails, the unloading and variable resistance shock absorption structure 1 realizes the variable resistance shock absorption process of "repulsion first increases and then decreases to zero"; deceleration to At zero time, the system will not rebound; during the impact buffering process, the driving force of the wire rope is unloaded through the action of the moving pulley; when the fault is eliminated, the system can automatically reset to the wire rope tensioning effect; pulley baffle 12 It can prevent the wire rope from falling out of the effective range of the pulley when it is loose, which helps the wire rope to automatically return to the groove of the pulley during subsequent reset.

Claims (9)

1. The utility model provides an uninstallation and variable resistance shock attenuation structure for wire rope which characterized in that: the unloading and variable-resistance shock absorption structure (1) comprises a fixed module (2) and a movable module (3), the movable module (3) is movably sleeved on the fixed module (2), one end of the movable module (3) is connected with a steel wire rope (17), and the other end of the movable module is suspended in the air or receives the impact and extrusion of an external object; an external object contacts and pushes the movable module (3) to move relative to the fixed module (2) to drive the movable module (3) to move in a resistance-variable mode, unloading of the steel wire rope is achieved, and then resistance-variable shock absorption is achieved; when the external object is not in contact with the moving module (3), the steel wire rope is tensioned;

the fixed module (2) comprises two direct current power supplies (4), a fixed electromagnet (5) and two groups of conducting plate groups; the fixed electromagnet (5) comprises a fixed sleeve (8) and a fixed conductive coil (9), and the fixed conductive coil (9) is wound on the fixed sleeve (8); the two groups of conducting plate groups are arranged in parallel and closely, and each group of conducting plate group is formed by two conducting plates (6) which are arranged in parallel, oppositely and at intervals; two ends of the fixed conductive coil (9) are respectively connected to two conductive plates (6) in a group of conductive plate groups, and a direct current power supply (4) is connected in series between one end of the fixed conductive coil (9) and the conductive plates (6);

the moving module (3) comprises a sliding rod (10), a movable pulley (11), a resistor assembly and a moving electromagnet (14); one end of a sliding rod (10) movably penetrates through a fixed sleeve (8) and is provided with a movable electromagnet (14), the middle part of the sliding rod (10) is positioned between two current conducting plates (6) of two groups of current conducting plates of a fixed module (2), the middle part of the sliding rod (10) is fixedly sleeved with an annular resistance component, two sides of the resistance component are respectively and electrically connected to the two current conducting plates (6) of at least one group of current conducting plates so as to conduct the two current conducting plates (6), the other end of the sliding rod (10) is hinged with a movable pulley (11), and a steel wire rope (17) is wound around the movable pulley (11); the movable electromagnet (14) comprises an annular sleeve (15) and a movable conductive coil (16), the annular sleeve (15) is fixed at the end part of the sliding rod (10) movably penetrating through the fixed sleeve (8), and the movable conductive coil (16) is wound on the annular sleeve (15); two ends of the movable conductive coil (16) are respectively connected to two conductive plates (6) in the other group of conductive plate groups, and another direct current power supply (4) is connected in series between one end of the movable conductive coil (16) and the conductive plates (6).

2. An unloading and variable-resistance seismic mitigation structure for steel wire rope according to claim 1, wherein: the directions of magnetic fields generated after the fixed conductive coil (9) and the moving conductive coil (16) are electrified are opposite.

3. An unloading and variable-resistance seismic mitigation structure for steel wire ropes according to claim 2, wherein: the spiral winding directions of the fixed conductive coil (9) and the movable conductive coil (16) are the same, and the current directions are opposite.

4. An unloading and variable-resistance seismic mitigation structure for steel wire rope according to claim 1, wherein: and the conducting plate group connected with the movable conducting coil (16) is arranged closer to the steel wire rope (17) and the movable pulley (11) than the conducting plate group connected with the fixed conducting coil (9).

5. An unloading and variable-resistance seismic mitigation structure for steel wire ropes according to claim 1, wherein: the resistance assembly is composed of a plurality of resistance plates (13), the resistance plates (13) are fixedly sleeved on the sliding rod (10) at intervals, and two sides of at least one resistance plate (13) in the resistance assembly are respectively and electrically connected to two conductive plates (6) of a group of conductive plate groups connected with the fixed conductive coil (9), so that the two conductive plates (6) are conducted with each other.

6. An unloading and variable-resistance shock-absorbing structure for steel wire ropes according to claim 5, wherein: the length of the whole resistance plates (13) along the axial direction of the sliding rod (10) is greater than the length of the two conductive plates (6) of one group of conductive plate groups along the axial direction of the sliding rod (10), and is less than the sum of the two times of the length of the two conductive plates (6) of one group of conductive plate groups along the axial direction of the sliding rod (10) and the gap between the two groups of conductive plates (6).

7. An unloading and variable-resistance shock-absorbing structure for steel wire ropes according to claim 5, wherein: the sliding rod (10) movably penetrates through the fixed sleeve (8) to move axially, so that the fixed resistor assembly on the sliding rod (10) is driven to move synchronously, the number of the resistor plates (13) which are connected and conducted between the two current-conducting plates (6) in the two groups of current-conducting plate groups is adjusted, namely, the resistance of the resistor assembly which is connected and conducted between the two current-conducting plates (6) in the two groups of current-conducting plate groups is adjusted, and further, the conduction current generated in the fixed conductive coil (9) and the movable conductive coil (16) is adjusted, namely, the magnetic fields generated by the fixed conductive coil (9) and the movable conductive coil (16) are adjusted, and the mutual variable resistance repulsion motion between the fixed module (2) and the movable module (3) is realized.

8. An unloading and variable-resistance shock-absorbing structure for steel wire ropes according to claim 5, wherein: the side part of the movable pulley (11) is connected with a pulley baffle (12) for limiting the slipping of the steel wire rope (17).

9. Use of an unloading and resistance-varying seismic damping structure for steel wire ropes according to any one of claims 1 to 8, characterized in that: the unloading and variable resistance damping structure is used for buffering falling of the elevator.

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