Safety gear for high-rise building elevator

Abstract

The application provides a safety clamp for high-rise building elevator, and relates to the technical field of building safety. The safety clamp comprises a clamp body shell, locking blocks are fixed on both sides of the clamp body shell, a trapezoidal section is formed on the front surface of the clamp body shell, installation grooves are formed on both sides of the trapezoidal section, the inner cavities of the installation grooves are movably connected with double wedge block mechanisms through pulling mechanisms, safety ropes are arranged between the two double wedge block mechanisms, a connecting base is arranged at the bottom of the clamp body shell, stroke grooves are arranged on the front and back surfaces of the inner cavity of the clamp body shell, the double wedge block mechanisms can move horizontally and vertically along the stroke grooves, a triggering mechanism is arranged on the front surface of the clamp body shell, when the elevator car body moves downward or upward at a high speed, the two double wedge block mechanisms are horizontally pushed, the two double wedge block mechanisms generate relative friction with the safety ropes, the two double wedge block mechanisms move downward or upward relative to the clamp body shell under the action of the friction, and then the two double wedge block mechanisms are locked by the locking blocks. The bidirectional wedge blocks can realize bidirectional braking, and the practicability of the device is improved.

Description

Technical Field

[0001] This invention relates to the field of building safety technology, and in particular to a safety clamp for elevators in high-rise buildings. Background Technology

[0002] Elevators are an essential piece of equipment in modern high-rise buildings, solving the problem of time-consuming and laborious travel between high-rise buildings. Due to the increasing travel needs of people, elevators often operate 24 hours a day, and malfunctions are inevitable. In order to ensure the safety of passengers inside the elevator in the event of a malfunction, speed governors and safety brakes are used in combination to protect the elevator and ensure that the elevator car can be completely stopped when it is overspeeding.

[0003] The speed governor activates the safety brake after an overspeed, while the safety brake stops the elevator car. The proper functioning of the safety brake directly impacts the elevator's safety performance. Traditional safety brakes consist of a housing, brake blocks, and wedges. The traction rope is directly connected to the wedges. When the speed governor's flywheel is jammed, the traction rope connected to the wedges is lifted by the tension. The inclined surface of the brake blocks brings the wedges closer together, contacting the safety rope in the middle and generating friction. Simultaneously, the wedges and brake blocks are pressed and locked together, achieving a complete stop. This type of safety brake is simple in structure, practical, convenient, and inexpensive, making it the most widely used type of safety brake currently.

[0004] Although existing safety brakes for high-rise building elevators have many advantages, they still have certain limitations in actual use. Traditional safety brakes can only stop the elevator car from falling too fast, but they cannot function when the elevator car is about to hit the top, leading to safety accidents.

[0005] In response, this invention proposes a safety clamp for elevators in high-rise buildings, aiming to solve the aforementioned problems. Summary of the Invention

[0006] The purpose of this invention is to provide a safety clamp for elevators in high-rise buildings. This safety clamp has the advantage of bidirectional braking, which solves the problem that traditional safety clamps can only solve the problem of overspeed descent but cannot solve the problem of overshooting.

[0007] This invention provides a safety clamp for elevators in high-rise buildings, comprising: a clamp body shell, with locking blocks fixedly installed on both sides of the inner wall of the clamp body shell; trapezoidal sections are respectively formed on the front center of the clamp body shell near the top and bottom; mounting grooves are respectively formed on both sides of the trapezoidal sections; the inner cavity of each mounting groove is movably connected to the surface of a set of double wedge slider mechanisms through a pulling mechanism; a safety rope is provided between the two sets of double wedge slider mechanisms; a connecting base for connecting to the elevator car body is provided on the bottom back of the clamp body shell; travel grooves are respectively provided on the front and back of the inner cavity of the clamp body shell; the double wedge slider mechanisms can move laterally and longitudinally along the travel grooves; a triggering mechanism is provided on the outer front of the clamp body shell; the triggering mechanism can push the two sets of double wedge slider mechanisms laterally towards the center when the elevator car body moves downward or upward at excessive speed, so that they generate relative friction with the safety rope; the double wedge slider mechanisms move downward or upward relative to the clamp body shell under the action of friction, and then abut against the locking blocks and lock.

[0008] Preferably, the travel groove includes multiple sets of transverse grooves and longitudinal grooves. The longitudinal grooves are respectively disposed on both sides of the center line of the front and back of the inner wall of the clamp body housing. One end of each set of transverse grooves is perpendicularly connected to the longitudinal groove near the center, and the other end of the transverse grooves extends to both sides of the clamp body housing.

[0009] Preferably, the bottom of the transverse groove and the longitudinal groove are respectively provided with stepped bottom grooves.

[0010] Preferably, the double wedge slider mechanism includes a wedge body, with contact slopes provided at the top and bottom of one side of the wedge body. The inclination direction of the contact slopes corresponds to the adjacent trapezoidal cross-section. Slide rods are fixedly installed on the front and back of the wedge body near the middle position. Each slide rod is slidably installed in the corresponding transverse groove in the initial state. Push plates are fixedly installed between adjacent slide rods. A connecting shaft that is movably connected to each of the pulling mechanisms is fixedly installed on the surface of the wedge body. The slide rods can slide out of the transverse groove and into the longitudinal groove under the action of the triggering mechanism.

[0011] Preferably, each set of the double wedge slider mechanism has two sliders, which vertically penetrate the wedge and slide in cooperation with the transverse groove or the longitudinal groove on the front and back of the clamp housing. The diameter of the slider is smaller than the opening width of the transverse groove and the longitudinal groove.

[0012] Preferably, the triggering mechanism includes a main shaft that passes through the outer side of the middle of the double wedge slider mechanism and is rotatably connected to the front and back of the clamp housing. Push blocks are fixedly sleeved on the outer surface of the main shaft. The number of push blocks corresponds to the number of push plates and is located on their outer side. In the initial state, the push blocks are in contact with the push plates. A torsion bar is fixedly sleeved at one end of the main shaft. A side rod is fixed at the end of the torsion bar away from the main shaft. A traction rope is connected inside the side rod by a hook lock. When the elevator car body overspeeds and the speed limiter locks, the traction rope is pulled and pulls the side rod, causing the torsion bar to generate torque and drive the main shaft to rotate. This causes the push blocks to rotate and pushes the slider out of the transverse groove and into the longitudinal groove.

[0013] Preferably, the bottom of the push block is fitted with a drag-reducing guide wheel. When the push block rotates, the drag-reducing guide wheel abuts against the push plate, causing the slide rod to slide out of the transverse groove.

[0014] Preferably, a travel pressure bar is fixedly installed on the back of the force-bearing torsion bar, and a compression bar is provided in the center of the front of the clamp body shell. After the force-bearing torsion bar rotates, the travel pressure bar and the compression bar abut against each other.

[0015] Preferably, the pulling mechanism includes a rotating shaft seat, which is movably sleeved with the inner wall of the mounting groove. The rotating shaft seat is fixedly connected to one end of the stroke rod, and the other end of the stroke rod is telescopically fitted with a sleeve rod. A bushing is fixedly installed at the end of the sleeve rod, and the bushing is movably sleeved with the connecting shaft.

[0016] Preferably, a stress spring is fixedly installed at the other end of the stroke rod, the stress spring is connected to the inner wall of the sleeve rod, and the stress spring is in a stretched state in the initial state.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The double wedge slider mechanism can be triggered when the elevator car body exceeds the speed of upward or downward movement. Under the friction of the safety rope, it will move upward or downward and lock with the locking block through the inclined surface, so as to achieve the effect of braking in both directions of overspeed. 2. During normal elevator operation, the double wedge slider mechanism does not come into contact with the safety rope, and the double wedge slider mechanism can be pulled laterally by the pulling mechanism to ensure that the double wedge slider mechanism will not come off and come into contact with the safety rope during normal elevator car operation, thus improving the stability of the device during operation. 3. It is no longer necessary to connect the traction rope directly to the wedge block, which could lead to the rope breaking due to excessive traction force after the double wedge slider mechanism locks, resulting in wedge block failure. In this technical solution, the traction rope only needs to be connected to the triggering mechanism, which can push the double wedge slider mechanism out to make it contact the safety rope and continuously exert the braking effect, thus avoiding the failure of the traction rope. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the safety clamp of the present invention; Figure 2 This is a schematic diagram of the structure of the clamp body shell in this invention; Figure 3 This is a top view of the clamp body shell in this invention; Figure 4 For the present invention along Figure 3 Cross-sectional view after being cut along the AA direction; Figure 5 For the present invention along Figure 3 Cross-sectional view after sectioning along the BB direction; Figure 6 This is a three-dimensional structural diagram of the double wedge slider mechanism in this invention; Figure 7 This is a left view of the double wedge slider mechanism in this invention; Figure 8 This is a three-dimensional structural diagram of the traction mechanism in this invention; Figure 9 This is a cross-sectional view of the traction mechanism of the present invention after being cut along the axial direction; Figure 10 This is a front view of the triggering mechanism in this invention; Figure 11 This is a schematic diagram of the back of the triggering mechanism in this invention; Explanation of reference numerals in the attached figures: 1. Clamp housing; 2. Locking block; 3. Trapezoidal cross-section; 4. Mounting groove; 5. Double wedge slider mechanism; 51. Wedge; 52. Contact slope; 53. Slide rod; 54. Push plate; 55. Connecting shaft; 6. Pulling mechanism; 61. Rotating shaft seat; 62. Stroke rod; 63. Sleeve rod; 64. Bushing; 65. Stress spring; 7. Safety rope; 8. Connecting base; 9. Stroke groove; 91. Transverse groove; 92. Longitudinal groove; 93. Stepped bottom groove; 10. Pressing bar; 11. Triggering mechanism; 111. Main shaft; 112. Push block; 113. Resistance reducing guide wheel; 114. Torsion bar; 115. Stroke pressure bar; 116. Side rod; 117. Traction rope. Detailed Implementation

[0020] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] like Figure 1-5As shown, this invention discloses a safety clamp for elevators in high-rise buildings, comprising: a clamp body shell 1, which is flat and cylindrical with a rectangular cross-section; locking blocks 2 are fixedly installed on both sides of the inner wall of the clamp body shell 1; the surface of the locking blocks 2 is a side-mounted trapezoid, and its long surface is fixedly connected to the side inner wall of the clamp body shell 1; the two inclined surfaces of the locking blocks 2 are located at the top and bottom of the clamp body shell 1, respectively, and have the same inclination; trapezoidal sections 3 are respectively opened in the middle of the front of the clamp body shell 1 near the top and bottom; the inclined surfaces of the locking blocks 2 are located on the outer side of the trapezoidal sections; mounting grooves 4 are respectively opened on both sides of the trapezoidal sections 3; the inner cavity of each mounting groove 4 is movably connected to the surface of a set of double wedge slider mechanisms 5 through a pulling mechanism 6; and a vertically arranged safety rope 7 is provided between the two sets of double wedge slider mechanisms 5. The bottom back of the clamp housing 1 is provided with a connecting base 8 for connecting with the elevator car body. The front and back of the inner cavity of the clamp housing 1 are respectively provided with stroke grooves 9. The double wedge slider mechanism 5 can move laterally and longitudinally along the groove trajectory of the stroke groove 9. The outer front of the clamp housing 1 is provided with a trigger mechanism 11. When the elevator car body moves downward or upward at overspeed, the trigger mechanism 11 can push the two sets of double wedge slider mechanisms 5 laterally towards the middle, so that they move laterally along the stroke groove 9 to the middle and generate relative friction with the safety rope 7. Under the action of friction, the double wedge slider mechanism 5 moves longitudinally downward or upward relative to the clamp housing 1 along the stroke groove 9. Then, the inclined surface of the double wedge slider mechanism 5 cooperates with the inclined surface of the locking block 2 to lock, achieving the effect of braking in both directions of overspeed.

[0024] Specifically, the travel groove 9 includes multiple sets of transverse grooves 91 and longitudinal grooves 92. The longitudinal grooves 92 are respectively located on both sides of the center line of the front and back of the inner wall of the clamp housing 1, and are used to limit the longitudinal travel of the two sets of double wedge slider mechanisms 5. Each longitudinal groove 92 is connected to two transverse grooves 91. One end of each set of transverse grooves 91 is perpendicularly connected to the middle of the longitudinal groove 92, and the other end of the transverse grooves 91 extends to both sides of the clamp housing 1. The bottom of the transverse grooves 91 and the longitudinal grooves 92 are respectively provided with stepped bottom grooves 93, and the two ends of the stepped bottom grooves 93 extend to the top and bottom of the clamp housing 1, respectively.

[0025] like Figure 1 , 6As shown in Figure 7, the double wedge slider mechanism 5 includes a wedge 51. The top and bottom of one side of the wedge 51 are provided with contact slopes 52. The inclination direction of the contact slopes 52 corresponds to the side surface of the adjacent trapezoidal cross-section 3. The inner surface of the wedge 51 can be roughened, corrugated, or have attached friction particles to increase the friction between it and the safety rope 7. Two slide rods 53 are fixedly installed near the middle of the front and back sides of the wedge 51. The slide rods 53 vertically penetrate the wedge 51 and slide in cooperation with the transverse grooves 91 or longitudinal grooves 92 on the front and back sides of the clamp housing 1. The diameter of the slide rod 53 is smaller than the width of the transverse groove 91 and the longitudinal groove 92. Each slide bar 53 is initially slidably installed in each transverse groove 91. A push plate 54 is fixedly installed between adjacent slide bars 53, and the push plate 54 connects the two slide bars 53 to form a whole. A connecting shaft 55 that is movably connected to each pulling mechanism 6 is fixedly installed on the surface of the wedge 51. The slide bar 53 can slide out of the transverse groove 91 and enter the longitudinal groove 92 under the action of the triggering mechanism 11. The stepped bottom groove 93 makes the switching groove smoother and the sliding fit more stable. Through the structural design of the double wedge slider mechanism 5, regardless of whether the elevator car is in a downward or upward overspeed state, the lower contact slope 52 and the upper contact slope 52 can rub against the safety rope 7 through the inner side of the double wedge slider mechanism 5, thereby causing displacement and contact with the locking block 2 and squeezing and locking, thus achieving the braking effect. Compared with the problem that traditional safety clamps can only achieve unidirectional braking, if bidirectional braking is to be achieved, two sets of opposite safety clamps must be installed, making the structure too complicated and inconvenient to install. This invention can achieve bidirectional braking by setting bidirectional wedges, thus improving the practicality of the safety clamp.

[0026] like Figure 1 , 10As shown in Figure 11, the triggering mechanism 11 includes a main shaft 111. The main shaft 111 passes through the outer side of the middle part of the double wedge slider mechanism 5 and is rotatably connected to the front and back sides of the clamp housing 1. A push block 112 is fixedly sleeved on the outer surface of the main shaft 111. The number of push blocks 112 corresponds to the number of push plates 54 and is located on the outside of them. In the initial state, the push blocks 112 are in contact with the push plates 54. A force-bearing torsion bar 114 is fixedly sleeved on one end of the main shaft 111. A side rod 116 is fixedly fixed on the end of the force-bearing torsion bar 114 away from the main shaft 111. A traction rope 117 is connected inside the side rod 116 through a hook lock. A stroke pressure strip 115 is fixedly installed on the back side of the force-bearing torsion bar 114. A squeezing strip 10 is provided in the middle of the front side of the clamp housing 1. When the elevator car body overspeeds and the speed limiter locks, the traction rope 117 is pulled and pulls the side rod 116, causing the torsion bar 114 to generate torque and drive the main shaft 111 to rotate. After the torsion bar 114 rotates 90°, the travel pressure bar 115, under the torque of the torsion bar 114, comes into contact with and is pressed against the compression bar 10, causing the push block 112 to rotate and pushing the slide bar 53 out of the transverse groove 91, losing its longitudinal positioning and entering the longitudinal groove 92. Finally, the inner surface of the double wedge-shaped slider mechanism 5 comes into contact with and rubs against the safety rope 7, moving up and down under the action of friction, thereby achieving contact at an angle. The inclined surface of the locking block 2 contacts and locks the surface of the surface 52. This method does not require the traction rope 117 to be directly connected to the wedge block 51, thus avoiding the situation where the traction force is too large after the wedge block 51 is locked and the rope breaks, resulting in failure. In this invention, the push block 112 only needs to push out the double wedge slider mechanism 5 so that it contacts the safety rope 7 and can play its role. At this time, if the traction rope 117 breaks, the stroke pressure bar 115 and the compression bar 10 are in a compressed state and cannot be reset. The double wedge slider mechanism 5 will always remain in the pushed-out state and cannot be reset or fail, thus improving the reliability of the device.

[0027] In this embodiment, a drag-reducing guide wheel 113 is also sleeved on the bottom of the push block 112. The drag-reducing guide wheel 113 can rotate relative to the push block 112. When the push block 112 rotates, the drag-reducing guide wheel 113 abuts against the push plate 54, causing the slide rod 53 to slide out from the transverse groove 91. The drag-reducing guide wheel 113 can effectively reduce the friction between the push block 112 and the double wedge slider mechanism 5, avoiding the situation where excessive friction causes the length of the push block 112 to become shorter and unable to completely push out the double wedge slider mechanism 5, thus improving the stability of the device during operation.

[0028] like Figure 1 and Figure 7-9As shown, the traction mechanism 6 includes a rotating shaft seat 61, which is movably sleeved with the inner wall of the mounting groove 4. The rotating shaft seat 61 is fixedly connected to one end of the stroke rod 62, and the other end of the stroke rod 62 is telescopically fitted with one end of the sleeve rod 63. A bushing 64 is fixedly installed on the other end of the sleeve rod 63, and the bushing 64 is movably sleeved with the connecting shaft 55. A stress spring 65 is fixedly installed on the other end of the stroke rod 62, and the stress spring 65 is connected to the inner wall of the sleeve rod 63. The stress spring 65 is in a stretched state in the initial state, and can laterally pull the connecting shaft 55 in the initial state. This ensures that during normal operation of the elevator, the connecting shaft 55 will not be dislodged from the interior of the transverse groove 91 due to vibration during elevator car operation, which would cause the wedge device 5 to come into contact with the safety rope 7 and cause an emergency braking situation during normal elevator operation. This improves the stability of the device during operation. When the double wedge slider mechanism 5 comes into contact with the safety rope 7 and is subjected to friction, causing displacement, if the double wedge slider mechanism 5 is displaced vertically upwards at this time, the lower contact slope 52 contacts and presses against the slope of the locking block 2, locking it in place. At this time, due to the shortening of the distance between the two ends of the upper pulling mechanism 6, the stroke rod 62 is compressed and retracts into the sleeve rod 63. At this time, the stress spring 65 changes from a stretched state to a compressed state, and its elastic force acts on the surface of the connecting shaft 55 through the bushing 64, making the contact surface of the double wedge slider mechanism 5... The pressure on the contact surface between the upper part of the double wedge slider mechanism 5 and the safety rope 7 increases, thereby increasing the friction between the double wedge slider mechanism 5 and the safety rope 7. This increases the squeezing force between the double wedge slider mechanism 5 and the locking block 2, reducing the sliding distance of the elevator car after the safety brake effect is achieved. If the double wedge slider mechanism 5 moves vertically downward, the lower traction mechanism 6 will also increase the friction between the lower part of the double wedge slider mechanism 5 and the contact surface of the safety rope 7 through the same principle, thereby stopping the car in the shortest possible time and improving its safety performance.

[0029] The method of using this invention is as follows: During use, regardless of whether the elevator car is in a downward or upward overspeed state, the contact slope 52 located below the double wedge slider mechanism 5 and the contact slope 52 located above the double wedge slider mechanism 5 can rub against the safety rope 7 inside the double wedge slider mechanism 5, thereby causing displacement and contact with the locking block 2 and squeezing and locking, thus achieving the braking effect. The slide rod 53 is initially located inside the transverse groove 91, which plays a role in longitudinally limiting the double wedge slider mechanism 5 and preventing it from sliding up and down. At the same time, since the stress spring 65 is initially in a stretched state, the traction mechanism 6 can laterally pull the connecting shaft 55 in the initial state, ensuring that the slide rod 53 will not come out of the transverse groove 91 due to the vibration during the operation of the elevator car during normal operation. When the elevator car overspeeds and the speed limiter activates and locks, the traction rope 117 is pulled and pulls the side rod 116. Since the side rod 116 is located on one side of the torsion bar 114, the torsion bar 114 generates torque and rotates under the limiting action of the main shaft 111 during traction, until the torsion bar 114 rotates 90 degrees and causes the travel pressure bar 115 to collide with the extrusion bar 10 and stop rotating. At the same time, the push block 112 rotates 90 degrees synchronously under the drive of the main shaft 111. This pushes the push plate 54 and drives the double wedge slider mechanism 5 to move closer to the safety rope 7. During this process, the slide bar 53 disengages from the transverse groove 91 and enters the longitudinal groove 92, thus losing its longitudinal positioning. Finally, the double wedge slider mechanism 5 and the safety rope 7 come into contact and rub against each other, thereby achieving contact and locking between the contact inclined surface 52 and the locking block 2. At the same time, the drag-reducing guide wheel 113 can effectively reduce the friction between the push block 112 and the double wedge slider mechanism 5. When the double wedge slider... When mechanism 5 contacts and displaces with safety rope 7, if the double wedge slider mechanism 5 displaces vertically upwards, the lower contact slope 52 contacts and locks the locking block 2. At this time, due to the shortening of the distance between the two ends of the upper traction mechanism 6, the stroke rod 62 is compressed and retracts into the sleeve rod 63. At this time, the stress spring 65 changes from a stretched state to a compressed state. The spring force acts on the surface of the connecting shaft 55 through the bushing 64, which increases the pressure on the upper half of the contact surface of the double wedge slider mechanism 5 and the contact surface of the safety rope 7, thereby increasing the friction between the double wedge slider mechanism 5 and the safety rope 7, increasing the squeezing force between the double wedge slider mechanism 5 and the locking block 2, reducing the braking effect of the safety clamp, and reducing the sliding distance of the car. If the double wedge slider mechanism 5 displaces vertically downwards, the lower traction mechanism 6 will also increase the friction between the lower half of the double wedge slider mechanism 5 and the contact surface of the safety rope 7 through the same principle, thereby stopping the car in the shortest time.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A safety clamp for elevators in high-rise buildings, characterized in that, include: The clamp housing (1) has locking blocks (2) fixedly installed on both sides of its inner wall. The clamp housing (1) has trapezoidal sections (3) on the front center near the top and bottom. The trapezoidal sections (3) have mounting grooves (4) on both sides. The inner cavity of each mounting groove (4) is movably connected to the surface of a set of double wedge slider mechanisms (5) through a pulling mechanism (6). A safety rope (7) is provided between the two sets of double wedge slider mechanisms (5). The bottom back of the clamp housing (1) has a connecting base (8) for connecting to the elevator car body. The front and back of the inner cavity of the clamp housing (1) have stroke grooves (9). The stroke grooves (9) include multiple sets of transverse grooves (91). The longitudinal groove (92) is respectively located on both sides of the center line of the front and back of the inner wall of the clamp body shell (1). One end of each set of transverse grooves (91) is perpendicularly connected to the middle of the longitudinal groove (92). The other end of the transverse groove (91) extends to both sides of the clamp body shell (1). The double wedge slider mechanism (5) includes a wedge (51). The top and bottom of one side of the wedge (51) are provided with contact slopes (52). The inclination direction of the contact slopes (52) corresponds to the adjacent trapezoidal section (3). Slide rods (53) are fixedly installed on the front and back of the wedge (51) near the middle. The slide rods on each set of the double wedge slider mechanism (5) The number of (53) is two. The slide rod (53) penetrates the wedge (51) vertically and is slidably installed with the transverse groove (91) or the longitudinal groove (92) on the front and back of the clamp housing (1). The diameter of the slide rod (53) is smaller than the width of the groove opening of the transverse groove (91) and the longitudinal groove (92). Each slide rod (53) is slidably installed in the transverse groove (91) in the initial state. A push plate (54) is fixedly installed between adjacent slide rods (53). A connecting shaft (55) that is movably connected to each of the pulling mechanisms (6) is fixedly installed on the surface of the wedge (51). The slide rod (53) can slide out of the transverse groove (91) and enter the wedge under the action of the triggering mechanism (11). Within the longitudinal groove (92), the double wedge slider mechanism (5) can move laterally and longitudinally along the stroke groove (9). A trigger mechanism (11) is provided on the outer front side of the clamp body housing (1). The trigger mechanism (11) includes a main shaft (111). The main shaft (111) passes through the outer side of the middle part of the double wedge slider mechanism (5) and is rotatably connected to the front and back sides of the clamp body housing (1). A push block (112) is fixedly sleeved on the outer surface of the main shaft (111). The number of push blocks (112) corresponds to the number of push plates (54) and is located on their outer side. In the initial state, the push blocks (112) are in contact with the push plates (54). A force-bearing torsion bar (114) is fixedly sleeved on one end of the main shaft (111).A side rod (116) is fixed to the end of the torsion bar (114) away from the main shaft (111). A traction rope (117) is connected inside the side rod (116) via a hook lock. When the elevator car body overspeeds and the speed limiter engages and locks, the traction rope (117) is pulled and pulls the side rod (116), causing the torsion bar (114) to generate torque and drive the main shaft (111) to rotate, causing the push block (112) to rotate and... The slide bar (53) is pushed out of the transverse groove (91) and into the longitudinal groove (92). When the elevator car body moves downward or upward at excessive speed, the triggering mechanism (11) pushes the two sets of double wedge slider mechanisms (5) laterally towards the center, causing them to rub against the safety rope (7). Under the action of friction, the double wedge slider mechanism (5) moves downward or upward relative to the clamp housing (1), thereby contacting and locking with the locking block (2).

2. The safety clamp for elevators in high-rise buildings according to claim 1, characterized in that, The bottom of the transverse groove (91) and the longitudinal groove (92) are respectively provided with stepped bottom grooves (93).

3. The safety clamp for elevators in high-rise buildings according to claim 1, characterized in that, The bottom of the push block (112) is fitted with a drag-reducing guide wheel (113). When the push block (112) rotates, the drag-reducing guide wheel (113) abuts against the push plate (54), causing the slide rod (53) to slide out of the transverse groove (91).

4. The safety clamp for high-rise building elevators according to claim 1, characterized in that, A travel pressure bar (115) is fixedly installed on the back of the force-bearing torsion bar (114), and a squeezing bar (10) is provided in the center of the front of the clamp body shell (1). After the force-bearing torsion bar (114) rotates, the travel pressure bar (115) abuts against the squeezing bar (10).

5. The safety clamp for high-rise building elevators according to claim 1, characterized in that, The pulling mechanism (6) includes a rotating shaft seat (61), which is movably sleeved with the inner wall of the mounting groove (4). The rotating shaft seat (61) is fixedly connected to one end of the stroke rod (62), and the other end of the stroke rod (62) is telescopically fitted with the sleeve rod (63). A bushing (64) is fixedly installed at the end of the sleeve rod (63), and the bushing (64) is movably sleeved with the connecting shaft (55).

6. The safety clamp for elevators in high-rise buildings according to claim 5, characterized in that, A stress spring (65) is fixedly installed at the other end of the stroke rod (62). The stress spring (65) is connected to the inner wall of the sleeve rod (63). The stress spring (65) is in a stretched state in the initial state.

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