CN105480811B - Rope clamping device - Google Patents
Rope clamping device Download PDFInfo
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- CN105480811B CN105480811B CN201610035448.6A CN201610035448A CN105480811B CN 105480811 B CN105480811 B CN 105480811B CN 201610035448 A CN201610035448 A CN 201610035448A CN 105480811 B CN105480811 B CN 105480811B
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- brake
- movable clamping
- rope
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
- B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
- B66B5/24—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces by acting on guide ropes or cables
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention relates to a rope clamping device which is structurally characterized in that two brake clamping blocks with opposite clamping surfaces are arranged in a frame, a rope channel is formed between the clamping surfaces of the two brake clamping blocks, a friction plate is arranged on the clamping surface of each brake clamping block, at least one of the two brake clamping blocks is a movable clamping block which can move up and down in the frame, and a tension spring which pulls the movable clamping block to enable the back surface of the movable clamping block to be attached to the inner edge of the frame is arranged between the movable clamping block and the frame; the back surface of the movable clamping block is an inclined surface relative to the clamping surface, so that the movable clamping block forms a wedge-shaped block; the inner edge of the frame which is attached to the back surface of the movable clamping block is an inclined surface which is matched with the back surface of the movable clamping block. The invention can lead the lift car or the lifted heavy object to be immediately clamped by the rope clamping device no matter the lift car or the lifted heavy object rolls downwards or upwards, thereby preventing the occurrence of malignant consequences caused by accidents.
Description
Technical Field
The invention relates to a rope brake, in particular to a rope clamp.
Background
In recent years, accidents of car sliding, top rushing and bottom squating of an elevator occur at times, and in order to inhibit the accidents, the mandatory requirement that a safety protection device for preventing the car from moving accidentally is additionally arranged on the elevator is added in a modification list of No. 1 standard of safety standard for manufacturing and installing elevators newly issued in China so as to prevent the serious casualty accidents caused by the accidental movement of the car.
The existing safety protection devices for preventing the car from moving accidentally generally include the following three ways:
the first way is to add a separate set of brake on the basis of the original brake as a redundant design. The disadvantage of this form is that if the car moves accidentally in the power failure state, the two brakes will act simultaneously, which not only increases the original braking torque qualified for adjustment greatly, but also causes the elevator to brake too hard, possibly causing inertial damage to the elevator passengers. In addition, the conventional elevator structure is generally not provided with an installation position for installing the second set of brake and an unnecessary space.
The second way is to use a bi-directional safety gear device. The traditional mode is that the safety tongs are triggered mechanically, namely when the car moves unexpectedly and exceeds the speed, the mechanical speed limiter triggers the safety tongs to act, so that the work is reliable, but the mechanical speed limiter can trigger the safety tongs to act only under the condition of exceeding the speed. The bidirectional safety tongs are triggered by electromagnets, and can realize the action of the safety tongs under the condition that the car is moved accidentally and is not over-speed. And the electromagnet trigger comprises two working modes of power-on trigger and power-off trigger. However, when the system is powered off and the lift car is accidentally displaced, the power-on trigger mode cannot effectively trigger the safety gear to act; therefore, the electromagnet triggering mode of the bidirectional safety gear must adopt a power-off triggering mode. The disadvantage of the power-off triggering mode is that when the normal power failure of the power supply system occurs instead of the situation that the car moves accidentally, the electromagnet can trigger the bidirectional safety tongs to act, after the power supply is recovered, the elevator cannot automatically recover to normal operation due to the clamping of the safety tongs, and the safety tongs can be opened only by means of manual operation of maintenance personnel, so that the elevator can recover to normal operation. It is not imaginable that all elevators cannot automatically resume normal operation after a large-area power failure in an urban area occurs. If a set of automatic recovery device of safety tongs, such as a hydraulic driving device and the like, is added to each elevator, the setting cost is high and is not feasible.
A third way is to add a wire rope brake. Most of the existing steel wire rope brakes are uplink overspeed protectors, and the problems that firstly, the brake pad is eccentrically worn due to unilateral action exist; and secondly, the steel wire rope brake is also in an overspeed triggering working mode and is in one-way overspeed action. Therefore, under the condition of no overspeed operation, if the elevator car moves accidentally, the steel wire brake cannot trigger the action. Therefore, the wire rope brake must also be electromagnetically activated to achieve a protective action against car movement without overspeed conditions. However, the electromagnetic trigger still has the same problems of power-on trigger and power-off trigger as the bidirectional safety tongs.
It can be seen that the existing safety protection devices for preventing the elevator car from moving accidentally have very large technical or use defects, so that the actual use requirements of the elevator cannot be met.
Disclosure of Invention
The invention aims to provide a rope clamp to solve the problem that the conventional safety brake cannot meet the actual use requirement of elevator safety protection.
The purpose of the invention is realized as follows: a rope clamping device is characterized in that two brake clamping blocks with opposite clamping surfaces are arranged in a frame, a rope channel is formed between the clamping surfaces of the two brake clamping blocks, a friction plate is arranged on the clamping surface of each brake clamping block, at least one of the two brake clamping blocks is a movable clamping block, and a tension spring for pulling the movable clamping block to enable the back surface of the movable clamping block to be attached to the inner edge of the frame is arranged between the movable clamping block and the frame; the back surface of the movable clamping block is an inclined surface relative to the clamping surface, so that the movable clamping block forms a wedge-shaped block; the inner edge of the frame which is attached to the back surface of the movable clamping block is an inclined surface which is matched with the back surface of the movable clamping block.
The back surface of the movable clamping block is a mountain-shaped surface with a raised middle part formed by intersecting two inclined surfaces facing opposite directions; the inner edge of the frame is a conical surface which is formed by intersecting two inclined surfaces facing opposite directions and is concave in the middle. Therefore, the safety protection device with bidirectional braking protection is formed.
In the present invention, one of the brake shoes opposite to the movable shoe may be a fixed shoe fixed in the frame.
The two brake clamping blocks can also be movable clamping blocks, the two movable clamping blocks have the same structure, and are symmetrically arranged in the frame.
The middle part of the back surface of the movable clamping block is provided with a longitudinal sliding groove; the braking mechanism is provided with a compression spring and a braking push rod pushed by the compression spring, and the front end of the braking push rod abuts against the sliding groove of the movable clamping block.
According to the invention, two brake triggering mechanisms can be symmetrically arranged on the frame, and each brake triggering mechanism drives one movable clamping block to act through a brake push rod.
The frame can also be provided with a braking trigger mechanism and a set of linkage mechanism, and the linkage mechanism is connected with the braking trigger mechanism; the brake trigger mechanism drives one movable clamping block to act through a brake push rod, and simultaneously drives the other movable clamping block to act oppositely through the linkage mechanism.
And the back of the movable clamping block is provided with a roller, a bearing or an arched spring plate. The roller or the bearing is arranged to reduce the sliding friction between the movable clamping block and the inner edge of the frame; the bow-shaped spring plate is arranged for properly delaying the clamping action of the movable clamping block during safety braking.
The front end of the brake push rod is provided with a bearing or a roller to reduce the friction resistance between the movable clamping block and the end of the brake push rod during safe braking.
The movable clamping block of the wedge-shaped body is arranged in the wedge-shaped groove of the rope clamp frame, so that under normal conditions, the movable clamping block is pulled to the most concave part of the conical surface of the inner edge of the frame by the tension spring, and therefore, a rope passing through the rope channel can keep passing without obstacles, and the normal use of an elevator or hoisting equipment is not influenced; when the elevator or the hoisting equipment is in the condition of accidental movement of a car or a hoisted heavy object due to failure of a main brake, a brake push rod is driven to push a movable clamping block in a rope clamp to move towards a clamping surface under the control of a detection control system of the equipment or a brake trigger mechanism on the rope clamp, so that a rope channel in the rope clamp is narrowed, a friction plate on the brake clamping block generates brake clamping friction force on a running rope, the brake clamping friction force is reacted on the movable clamping block to drive the movable clamping block to move towards the direction (upwards or downwards) of the rope movement, at the moment, the wedge-shaped movable clamping block automatically reduces a rope clamping gap of the rope channel in the moving process under the guiding and restricting action of a wedge-shaped groove of a frame, the rope is quickly clamped until the rope is clamped, so that the reliable and quick clamping brake of a traction rope is realized, and the protection effect of safe brake is realized, the elevator car or the lifted heavy object can be immediately clamped and stopped by the rope clamping device no matter the elevator car or the lifted heavy object upwards rushes to the top or slides downwards, so that accidents of the elevator car or the lifted heavy object upwards rushing to the top or sliding downwards and the like caused by failure of a main brake of the elevator or hoisting equipment are avoided.
If the power supply line is in fault or the power is normally cut off, a main brake of the elevator or the hoisting equipment brakes and clamps the traction steel wire rope; and the rope clamping device can clamp the steel wire rope through the braking clamping block under the action of the braking triggering mechanism. However, at the moment, the elevator or the hoisting equipment is braked by clamping the traction steel wire rope by the main brake, so that the condition of up-and-down movement of the steel wire rope can not occur, the condition that the movable clamping block is driven by the friction force of the steel wire rope to move can not be generated by the braking of the rope clamping device, and the condition that the movable clamping block clamps the rope at the wedge-shaped end of the frame can not occur. After the power supply is recovered, the braking trigger mechanism is electrified and returned, the movable clamping block in the rope clamping device can be automatically reset under the action of the tension spring, the rope clamping device is automatically opened, the elevator or hoisting equipment can automatically recover to normal work, and therefore the condition of manual reset operation required by power failure of a power supply line is avoided, great work convenience is provided for the safety brake on the elevator or the hoisting equipment for preventing the accidental displacement of the car/heavy object, and the safety brake on the elevator or the hoisting equipment for preventing the accidental displacement of the car/heavy object is additionally arranged to be possible.
The invention has the following characteristics:
1. the positive pressure of the brake trigger mechanism on the movable clamping block is utilized to clamp the traction rope, and the movable clamping block with a wedge-shaped structure enters the wedge-shaped groove of the frame under the driving of the displacement of the traction rope by the friction force formed between the traction rope and the friction plate so as to clamp the traction rope, thereby achieving the purpose of braking. Only when the traction rope moves, the movable clamping block enters the wedge-shaped groove of the frame to realize clamping and braking.
2. Under the condition that the brake trigger mechanism applies positive pressure to enable the brake clamping block to keep a clamping state, after the power supply is recovered, the brake trigger mechanism can automatically release the clamping pressure of the rope clamping device on the traction rope to enable the traction rope to recover a normal operation state, and therefore the problem of self-recovery of large-area power failure equipment is effectively solved.
3. The rope clamping device is simple in structure and small in occupied position, can be mounted beside an elevator machine room or a traction machine, is convenient for old body modification, and solves the problem that the existing elevator does not have a safety brake mounting position.
Drawings
FIG. 1 is a schematic structural view of example 1.
FIG. 2 is a side view of embodiment 1.
FIG. 3 is a plan view of embodiment 1.
Fig. 4 is a schematic structural view of embodiment 1 in a state of clamping the rope.
FIG. 5 is a schematic structural view of example 2.
FIG. 6 is a schematic structural view of embodiment 3.
FIG. 7 is a plan view of embodiment 3.
FIG. 8 is a schematic structural view of example 4.
FIG. 9 is a schematic structural view of example 5.
In the figure: 1. the brake device comprises a frame, 2, a rope channel, 3, a friction plate, 4, a movable clamping block, 5, a tension spring, 6, a sliding groove, 7, a brake electromagnet, 71, a yoke, 72, an armature, 73, an electromagnetic coil, 74, a compression spring, 75, a brake push rod, 8, an end plate, 9, a fixed clamping block, 10 and a steel wire rope.
Detailed Description
Example 1
As shown in fig. 1, 2 and 3, the frame 1 is a rectangular-cylindrical three-dimensional frame structure, the top surface and the bottom surface of the frame 1 are provided with vertically-opposite slit-shaped openings, the frame 1 is provided with two brake blocks with opposite clamping surfaces, a rope passage 2 is formed between the clamping surfaces of the two brake blocks, and the rope passage 2 is vertically opposite to the slit-shaped openings on the frame 1, so that the traction steel wire rope 10 can vertically pass through the frame 1. The two brake clamping blocks are oppositely arranged, the opposite surfaces of the brake clamping blocks are mutually parallel clamping surfaces, and a friction plate 3 is arranged on the clamping surface of each brake clamping block. In this embodiment, the two brake clamping blocks are both movable clamping blocks 4, and the two movable clamping blocks 4 have the same structure and are symmetrically arranged in the frame 1.
In fig. 1, the back surface (the surface opposite to the clamping surface) of the movable clamping block 4 is a mountain-shaped surface with a convex middle portion formed by intersecting an upper oblique vertical surface and a lower oblique vertical surface which face oppositely, and two oblique vertical surfaces in the mountain-shaped surface can be vertical symmetrical surfaces. Two symmetrically arranged movable clamping blocks 4 form a shuttle-shaped body. The inner edges of the frame body at the left side and the right side of the frame 1 are conical surfaces with concave middle parts formed by intersecting an upper inclined vertical surface and a lower inclined vertical surface which face oppositely, the two inclined vertical surfaces are vertical symmetrical surfaces, and the inclination of the inclined vertical surfaces of the frame corresponds to that of the inclined vertical surfaces of the movable clamping blocks. The tapered inner edges at the left side and the right side of the frame 1 are of a symmetrical structure, two opposite inclined vertical surfaces above the inner edges at the two sides of the frame 1 form a wedge-shaped groove, two opposite inclined vertical surfaces below the inner edges at the two sides form a wedge-shaped groove, therefore, two upward and downward wedge-shaped grooves are formed in the frame 1, and the upper wedge-shaped groove and the lower wedge-shaped groove are communicated with each other. The length of the inclined surface of each wedge-shaped groove is larger than that of the inclined vertical surface of the movable clamping block 4, so that the movable clamping block 4 can move up and down in the wedge-shaped groove of the frame 1.
The upper end and the lower end of the two sides of the frame 1 are respectively provided with a tension spring 5 which is used for shunting the upper end and the lower end of the movable clamping block 4 at the side where the tension springs are located. The movable clamping block 4 on the side is abutted to the central position of the inner edge of the frame through the action of the tension spring 5. The position is a normal holding position of the movable clamping block 4 and is also a position for keeping the rope passage 2 at the maximum opening degree so that the traction steel wire rope can normally pass through the rope passage 2.
In fig. 3, an end plate 8 is provided on the frame 1 at the lateral opening of the rope passage 2 to shield the brake shoes. The rope channel 2 is a four-side closed upper and lower channel surrounded by the frame 1, two braking clamping blocks and two end plates 8.
As shown in fig. 1 and 3, a longitudinal sliding groove 6 is formed in the middle of the back of the movable clamping block 4, and the sliding groove may be a through groove from top to bottom or a groove with a section of upper and lower seals formed in the middle. In the latter case, it is ensured that the movable clamping blocks 4 can reach the top dead center and the bottom dead center of the wedge-shaped groove of the frame after the brake push rod is inserted. The bottom surface of the sliding groove 6 is parallel to the clamping surface.
In fig. 1, brake triggering mechanisms including a brake electromagnet 7, a compression spring 74, a brake push rod 75, and the like are respectively provided at the middle portions of the outer sides of the frame bodies on the left and right sides of the frame 1. In fig. 1, the brake electromagnet 7 is composed of a yoke 71, an armature 72, and an electromagnetic coil 73; a compression spring 74 is installed in the inner cavity of the brake electromagnet 7 (which may be disposed outside the brake electromagnet), and a brake push rod 75 passes through the yoke 71, the armature 72, and the compression spring 74, and maintains a linkage structure with the armature 72. The brake push rod 75 is perpendicular to the clamping surface of the movable clamping block 4, and the front end of the brake push rod abuts against the bottom surface of the sliding groove 6 after penetrating into the frame 1, so that the brake push rod applies positive pressure to the movable clamping block 4 under the action of the compression spring 74. The brake push rods 75 on both sides of the frame 1 are oppositely positioned.
The brake electromagnet 7 can be a power-off trigger electromagnet, and an energy storage capacitor for providing a time-delay working power supply is connected in a control circuit of the brake electromagnet 7. The energy storage capacitor is used for providing a short-time (about 0.1-10 seconds) working power supply for the braking electromagnet when the power is lost so that the braking electromagnet 7 can be powered off and trigger the action after delaying for 0.1-5 seconds, and therefore, the action time of the rope clamping device can be lagged behind the action time of a main brake of a tractor, and the inertia injury caused by over-violent elevator braking due to the simultaneous action of the rope clamping device and the main brake of the tractor is avoided.
In the invention, only one braking trigger mechanism can be arranged on the frame 1, and a set of linkage mechanism is additionally arranged and connected with the braking trigger mechanism; the brake trigger mechanism drives one movable clamping block 4 to act through the brake push rod 75, and simultaneously drives the other movable clamping block on the opposite side to act oppositely through the linkage mechanism, so that the two movable clamping blocks 4 realize the opposite clamping action.
When the elevator is moved accidentally (i.e. the situation that the main brake fails), because the rope clamp in the braking state has braking clamping force on the traction steel wire rope, the friction plates 3 on the two movable clamping blocks 4 generate braking friction force on the passing steel wire rope 10, and the braking friction force counteracts the movable clamping blocks 4 to drive the movable clamping blocks 4 to move upwards (assuming that the steel wire rope moves upwards at the moment) and enter the upper wedge-shaped groove of the frame 1 (fig. 4). In the process of entering the wedge-shaped groove of the frame, the two movable clamping blocks 4 are forced to further move towards the clamping surface, so that the rope channel 2 is narrower, the steel wire rope 10 is quickly clamped and clamped, the reliable and quick clamping and stopping of the steel wire rope after the elevator main brake fails are realized, the safety protection effect is realized, and the occurrence of the accident that the lift car is pushed upwards due to the failure of the elevator main brake is avoided.
The working principle of the rope clamp for braking protection of the car sliding accident downwards is the same as that of the rope clamp, and only the two movable clamping blocks 4 enter the wedge-shaped groove at the lower part of the frame 1 to quickly clamp and clamp the steel wire rope 10.
In order to reduce the pressing resistance of the brake push rod 75 during the safe braking process of the movable clamping block 4, a plurality of rollers or bearings can be arranged on the back surface of the movable clamping block 4 to reduce the sliding friction between the movable clamping block and the inner edge of the frame. And a groove can be formed in the back surface of the movable clamping block 4, and an arch spring plate is embedded in the groove, wherein the arch top of the arch spring plate is higher than the surface of the movable clamping block 4, so that the flexible acting force is increased, and the clamping action of the movable clamping block 4 in the safety braking process is properly delayed. A bearing or a roller can be additionally arranged on the front end head of the brake push rod 75 to reduce the friction resistance between the movable clamping block 4 and the front end head of the brake push rod during safe braking.
Example 2
The structure of the embodiment is basically the same as that of the embodiment 1, and the structure is also a structure for arranging the double-movable clamping blocks and is provided with two braking triggering mechanisms; the front ends of the brake push rods 75 in the two brake triggering mechanisms respectively abut against the sliding grooves 6 of the movable clamping blocks 4 on one side of each brake triggering mechanism to trigger braking.
Except that the rope channel 2 is an upper and lower channel (fig. 5) which is enclosed by three surfaces and is opened at one side and is formed by the frame 1, the brake clamping block and the end plate 8. The structure with the opened side surface of the rope channel is convenient for installing the rope clamp on elevator equipment which is not easy to disassemble, namely, the steel wire rope 10 on the elevator can enter the rope channel 2 through the opened side, thereby greatly facilitating the installation of the rope clamp.
Example 3
As shown in fig. 6, the structure of this embodiment is basically the same as that of embodiment 1, except that one of the two brake blocks in the frame 1 is the movable block 4, and the other is the fixed block 9; the fixed clamping blocks 9 are fixed in the frame 1 and the provision of a respective one of the brake triggering mechanisms is dispensed with. Therefore, in the present embodiment, a brake triggering mechanism including the brake electromagnet 7, the compression spring 74, the brake push rod 75, and the like is provided only on the frame 1 on the movable clamp 4 side. Similarly, the brake electromagnet 7 is composed of a yoke 71, an armature 72, an electromagnetic coil 73 and the like; a compression spring 74 is installed in the inner cavity of the brake electromagnet 7 (which may be disposed outside the brake electromagnet), and a brake push rod 75 passes through the yoke 71, the armature 72, and the compression spring 74, and maintains a linkage structure with the armature 72. The brake push rod 75 is perpendicular to the slide groove 6 of the movable clamp block 4, and after the front end of the brake push rod penetrates into the frame 1, the front end of the brake push rod abuts against the bottom surface of the slide groove 6, and under the action of the compression spring 74, positive pressure is applied to the movable clamp block 4.
In this embodiment, the upper and lower inclined vertical surfaces of the left inner edge of the frame 1 and the clamping surfaces of the fixing clamp blocks 9 form an upward wedge-shaped groove and a downward wedge-shaped groove which are composed of the inclined vertical surfaces and the vertical surfaces.
In fig. 7, an end plate 8 for shielding the braking clamp block is arranged on the side surface of the frame 1 adjacent to the rope channel 2, and the rope channel 2 is surrounded by the frame 1, the movable clamp block 4, the fixed clamp block 9 and the end plates 8 at two sides to form an upper channel and a lower channel which are closed at four sides.
In this embodiment, a plurality of rollers or bearings may be disposed on the back of the movable clamping block 4 to reduce the sliding friction between the movable clamping block and the inner edge of the frame. And a groove can be formed in the back surface of the movable clamping block 4, and an arched spring plate can be embedded in the groove, so that the clamping action of the movable clamping block 4 during safety braking can be properly delayed. A bearing or a roller can be additionally arranged on the front end of the brake push rod 75 so as to reduce the frictional resistance between the movable clamping block 4 and the front end of the brake push rod during safe braking.
Example 4
As shown in fig. 8, the structure of this embodiment is basically the same as that of embodiment 3, and is also an arrangement structure of one movable clamping block and one fixed clamping block, and the brake triggering mechanism is provided only on the frame 1 on the movable clamping block 4 side, and the brake triggering mechanism is omitted on the frame 1 on the fixed clamping block 9 side. What is different is that the rope channel 2 is an upper channel and a lower channel which are enclosed by three surfaces and opened at one side and are formed by the frame 1, the movable clamping block 4, the fixed clamping block 9 and the end plates 8 at two sides. The embodiment is suitable for old body modification occasions where the traction steel wire rope is not convenient to disassemble.
Example 5
As shown in fig. 9, the frame 1 is a rectangular-cylindrical three-dimensional frame structure, a slit-shaped opening is provided on the top surface of the frame 1, two brake blocks with opposite clamping surfaces are provided in the frame 1, a rope passage 2 is formed between the clamping surfaces of the two brake blocks, the rope passage 2 is vertically opposite to the slit-shaped opening on the frame 1, and the traction wire rope 10 can vertically pass through the frame 1. The two brake clamping blocks are oppositely arranged, the opposite surfaces of the brake clamping blocks are mutually parallel clamping surfaces, and a friction plate 3 is arranged on the clamping surface of each brake clamping block. In this embodiment, the two brake clamping blocks are both movable clamping blocks 4, and the two movable clamping blocks 4 have the same structure and are symmetrically arranged in the frame 1.
In this embodiment, the clamping surface of the movable clamping block 4 is a vertical surface, the back surface of the movable clamping block is an inclined vertical surface, and the inclined surfaces of the two movable clamping blocks 4 face the upper side of the frame 1, so that the two movable clamping blocks 4 form a combined wedge-shaped body. The inner edges of the frame bodies at the two sides of the frame 1 are inclined planes which are matched with the back slope of the movable clamping block 4, and the inner edges of the inclined planes at the two sides of the frame 1 form a one-way wedge-shaped groove for clamping the combined wedge-shaped body.
The upper end and the lower end of the two sides of the frame 1 are respectively provided with a tension spring 5 which is used for shunting the upper end and the lower end of the movable clamping block 4 at the side where the tension springs are located. The movable clamping block 4 on the side is attached to the middle position of the inner edge of the frame body of the frame 1 under the action of the tension spring 5. The position is a normal holding position of the movable clamping block 4, so that the opening degree of the rope channel 2 meets the requirement that the traction steel wire rope smoothly passes through the rope channel 2.
The middle part of the back of the movable clamping block 4 is provided with a longitudinal sliding groove 6 which can be a through groove from top to bottom or a section of groove which is arranged in the middle and is sealed from top to bottom. The bottom surface of the sliding groove 6 is parallel to the clamping surface.
The middle parts of the outer sides of the frame bodies on the left side and the right side of the frame 1 are respectively provided with a braking trigger mechanism, and the braking trigger mechanism comprises a braking electromagnet 7, a compression spring 74, a braking push rod 75 and the like. The brake electromagnet 7 consists of a yoke 71, an armature 72, an electromagnetic coil 73 and the like; a compression spring 74 is installed in the inner cavity of the brake electromagnet 7 (which may be disposed outside the brake electromagnet), and a brake push rod 75 passes through the yoke 71, the armature 72, and the compression spring 74, and maintains a linkage structure with the armature 72. The brake push rod 75 is perpendicular to the clamping surface of the movable clamping block 4, and the front end of the brake push rod abuts against the bottom surface of the sliding groove 6 after penetrating into the frame 1, so that the brake push rod applies positive pressure to the movable clamping block 4 under the action of the compression spring 74. The brake push rods 75 on both sides of the frame 1 are oppositely positioned.
The brake electromagnet 7 can be a power-off trigger electromagnet, and an energy storage capacitor for providing a time-delay working power supply is connected in a control circuit of the brake electromagnet 7.
In this embodiment, only one braking triggering mechanism may be arranged on the frame 1, and a set of linkage mechanism is further installed, and the linkage mechanism is connected with the braking triggering mechanism; the brake trigger mechanism drives one movable clamping block 4 to act through the brake push rod 75, and simultaneously drives the other movable clamping block on the opposite side to act oppositely through the linkage mechanism, so that the two movable clamping blocks 4 realize the opposite clamping action.
In this embodiment, only one unidirectional wedge-shaped groove is formed in the frame 1, so that only unidirectional safety braking can be performed on the steel wire rope, and the hoisting device can be safely used on hoisting equipment such as a winch, because the hoisting equipment such as a winch only needs to solve the unidirectional accident that a heavy object falls and the steel wire rope descends when the main brake fails. If the embodiment is used on the elevator traction machine, the safety brakes can be respectively arranged at the steel wire ropes on the two sides of the traction machine, and the braking directions of the two safety brakes are opposite, so that the use requirement of the elevator traction machine on safety braking can be met.
Similarly, in this embodiment, a plurality of rollers or bearings may be disposed on the back of the movable clamping block 4 to reduce the sliding friction between the movable clamping block and the inner edge of the frame. And a groove can be formed in the back surface of the movable clamping block 4, and an arched spring plate can be embedded in the groove, so that the clamping action of the movable clamping block 4 during safety braking can be properly delayed. A bearing or a roller can be additionally arranged on the front end of the brake push rod 75 so as to reduce the frictional resistance between the movable clamping block 4 and the front end of the brake push rod during safe braking.
Example 6
Referring to fig. 9 and 6, the structure of the present embodiment is basically the same as that of embodiment 5, except that one of the two brake blocks is the movable block 4, and the other is the fixed block 9, so as to form a static-dynamic one-way safety brake. The fixed clamping blocks 9 are fixed in the frame 1 and the provision of a respective one of the brake triggering mechanisms is dispensed with. Therefore, in the present embodiment, a brake triggering mechanism including the brake electromagnet 7, the compression spring 74, the brake push rod 75, and the like is provided only on the frame 1 on the movable clamp 4 side. Similarly, the brake electromagnet 7 is composed of a yoke 71, an armature 72, an electromagnetic coil 73 and the like; the compression spring 74 is installed in the inner cavity of the brake electromagnet 7, and the brake push rod 75 passes through the yoke 71, the armature 72 and the compression spring 74, and maintains a linkage structure with the armature 72. The brake push rod 75 is perpendicular to the slide groove 6 of the movable clamp block 4, and after the front end of the brake push rod penetrates into the frame 1, the front end of the brake push rod abuts against the bottom surface of the slide groove 6, and under the action of the compression spring 74, positive pressure is applied to the movable clamp block 4.
The application of this example is the same as example 5.
The rope clamping device can perform safe braking in the following way:
1. a steel wire rope 10 for hoisting the cage or the heavy object passes through the rope channel 2 of the rope clamp, and a control circuit of the rope clamp is connected to a working power supply.
2. When the main brake of the tractor is in power-off braking, the brake is in synchronous power-off, but the energy storage capacitor provides 0.1-10 seconds of delay working power supply for the braking electromagnet 7, so that the rope clamp is braked after 0.1-5 seconds of delay.
3. And adjusting the opening action time of the rope clamp to be less than the opening action time of the main brake of the traction machine or the winch, and when the main brake of the traction machine or the winch is electrified and opened, the rope clamp is electrified at the same time, but the rope clamp is opened 0.05-0.5 second before the main brake of the traction machine or the winch.
4. When the traction machine or the winch normally moves, the movable clamping block 4 in the rope clamping device is pulled to the inner edge of the frame 1 by the tension spring 5, the rope channel 2 between the two braking clamping blocks is expanded, and the steel wire rope 10 passes through the rope channel 2 without obstacles.
5. When the main brake of the tractor or the winch brakes normally, the rope clamp acts in a delayed mode, the brake push rod 75 in the rope clamp applies positive extrusion force to the movable clamping block 4 under the action of the compression spring 74, the movable clamping block 4 is pressed to the steel wire rope 10 in the rope channel 2, and the two brake clamping blocks clamp the stopped steel wire rope 10.
6. When the main brake of the traction machine or the winch is normally opened, the rope clamping device performs suction action in advance of the main brake of the traction machine or the winch because the brake opening action time of the rope clamping device is shorter than the brake opening action time of the main brake of the traction machine or the winch, the forward extrusion force on the movable clamping block 4 is eliminated, the movable clamping block 4 is made to return to be attached to the inner edge of the frame 1 (figure 1) under the action of the tension spring 5, and the rope channel 2 is expanded before the steel wire rope is pulled.
7. When the main brake of the tractor brakes, the steel wire rope does not stop or restarts to act after stopping, the steel wire rope 10 clamped in the rope clamping device rope channel 2 drives the movable clamping block 4 to act along with the steel wire rope in the same direction, so that the movable clamping block 4 enters the wedge-shaped groove of the frame 1 (figure 4), generates larger clamping force on the steel wire rope in the rope channel 2 under the action of the wedge-shaped groove of the frame, and clamps and stops the moving steel wire rope under the limiting action of the frame 1.
8. When emergency braking is needed, a line switch between a control circuit and an energy storage capacitor in the rope clamp is disconnected, a brake push rod 75 in the rope clamp applies positive extrusion force to the movable clamping block 4 under the action of a compression spring 74, so that the movable clamping block 4 presses against the steel wire rope 10 in the rope channel 2, the two brake clamping blocks clamp the moving steel wire rope 10, the moving steel wire rope 10 drives the movable clamping block 4 to move upwards or downwards along with the movable clamping block through friction force, and the movable clamping block 4 enters a corresponding wedge-shaped groove of the frame 1; under the action of the wedge-shaped groove of the frame, the movable clamping block 4 generates larger clamping force on the steel wire rope 10 in the rope channel 2 and clamps and stops the moving steel wire rope under the limiting action of the frame 1.
9. When the fault of the main brake of the tractor or the winch is eliminated or the accident reason of emergency braking is eliminated, the working power supply is switched on, the main brake of the tractor or the winch is opened, the brake electromagnet 7 of the rope clamp is electrified and sucked, and the positive extrusion force of the compression spring 74 and the brake push rod 75 to the movable clamping block 4 is eliminated; then the hoisting machine or the winch is controlled to rotate reversely through the inching switch, at the moment, the steel wire rope 10 clamped and stopped by the brake clamping block in the wedge-shaped groove of the frame generates a reverse action trend, reverse acting force is applied to the brake clamping block, the movable clamping block 4 is loosened and moves in the opposite direction of entering the wedge-shaped groove of the frame, after the movable clamping block 4 leaves the end stop point of the wedge-shaped groove of the frame, the movable clamping block returns under the pulling action of the tension spring 5 and is attached to the inner edge of the frame, the rope channel 2 is expanded, and the loosening action after the rope clamp clamps are clamped and stopped is completed. Of course, the invention can also adopt the conventional manual operation mode, and utilize working mechanisms such as screw rods, jackscrews and the like to open the dead rope clamping device.
Claims (7)
1. A rope clamping device is characterized by comprising a frame with a square column-shaped three-dimensional frame structure, wherein a strip seam type opening which is opposite up and down is arranged on the top surface and the bottom surface of the frame, two braking clamping blocks with opposite clamping surfaces are arranged in the frame, a rope channel is formed between the clamping surfaces of the two braking clamping blocks, the rope channel is opposite to the strip seam type opening on the frame up and down, a friction plate is arranged on the clamping surface of each braking clamping block, at least one of the two braking clamping blocks is a movable clamping block, and a tension spring which pulls the movable clamping block to enable the back surface of the movable clamping block to be attached to the inner edge of the frame is arranged between the movable clamping block and the frame; the back surface of the movable clamping block is an inclined surface relative to the clamping surface, so that the movable clamping block forms a wedge-shaped block; the inner edge of the frame, which is attached to the back surface of the movable clamping block, is an inclined surface which is attached to the back surface of the movable clamping block;
the back surface of the movable clamping block is a mountain-shaped surface with a convex middle part formed by intersecting two inclined surfaces facing opposite directions; the inner edge of the frame is a conical surface with a concave middle part formed by intersecting two inclined surfaces in opposite directions;
a longitudinal sliding groove is formed in the middle of the back of the movable clamping block; the braking mechanism is arranged on the outer side of the frame body of the frame, a compression spring and a braking push rod pushed by the compression spring are arranged on the braking mechanism, and the front end of the braking push rod abuts against the sliding groove of the movable clamping block.
2. The rope clamp of claim 1 wherein one of the brake shoes opposite the movable shoe is a fixed shoe, the fixed shoe being secured in the frame.
3. The rope clamp of claim 1, wherein both of the two braking blocks in the frame are movable blocks, the two movable blocks have the same structure and are symmetrically arranged in the frame.
4. The rope clamp according to claim 1, wherein two brake triggering mechanisms are symmetrically arranged on the frame, and each brake triggering mechanism drives one movable clamping block to act through a brake push rod.
5. The rope clamp of claim 1, wherein a brake triggering mechanism and a set of linkage mechanisms are provided on the frame, the linkage mechanisms being connected to the brake triggering mechanism; the brake trigger mechanism drives one movable clamping block to act through a brake push rod, and simultaneously drives the other movable clamping block to act oppositely through the linkage mechanism.
6. The rope clamp of claim 1, 2 or 5, wherein a roller, a bearing or a bow spring plate is arranged on the back of the movable clamping block.
7. A rope clamp according to claim 1, 2 or 5, wherein a bearing or roller is provided on the front end of the brake push rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610035448.6A CN105480811B (en) | 2016-01-20 | 2016-01-20 | Rope clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610035448.6A CN105480811B (en) | 2016-01-20 | 2016-01-20 | Rope clamping device |
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| Publication Number | Publication Date |
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| CN105480811A CN105480811A (en) | 2016-04-13 |
| CN105480811B true CN105480811B (en) | 2020-04-24 |
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| CN201610035448.6A Active CN105480811B (en) | 2016-01-20 | 2016-01-20 | Rope clamping device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105819302B (en) * | 2016-05-31 | 2018-06-29 | 石家庄五龙制动器股份有限公司 | Rope brake |
| CN106044455B (en) * | 2016-08-05 | 2017-09-26 | 石家庄五龙制动器股份有限公司 | Compact rope brake |
| CN106429938B (en) * | 2016-11-29 | 2019-04-19 | 芜湖木木游乐设备有限公司 | A kind of dead-man's device using high-altitude rotation sightseeing equipment |
| CN108275538B (en) * | 2018-04-04 | 2019-07-19 | 浙江蒂尔森电梯有限公司 | A kind of express elevator safety tongs |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1024337C (en) * | 1990-01-18 | 1994-04-27 | 中国矿业大学 | Friction braking method and device for elevator |
| CN1121975C (en) * | 2000-04-14 | 2003-09-24 | 中国建筑科学研究院建筑机械化研究分院 | Bidirectional safety tongs for elevator |
| CN2623667Y (en) * | 2002-09-05 | 2004-07-07 | 盛嘉勋 | Bidirectional safe clamp |
| US7080717B2 (en) * | 2003-03-24 | 2006-07-25 | Mitsubishi Denki Kabushiki Kaisha | Emergency brake apparatus of elevator |
| CN2721586Y (en) * | 2004-05-24 | 2005-08-31 | 宁波申菱电梯配件有限公司 | Bidirectional speed limited safety pliers for elevator |
| CN1325362C (en) * | 2004-12-18 | 2007-07-11 | 宁波申菱电梯配件有限公司 | Rope brake for overspeed upgoing elevator |
| JP2009046274A (en) * | 2007-08-22 | 2009-03-05 | Mitsubishi Electric Building Techno Service Co Ltd | Hoisting/lowering preventive device and elevator device |
| CN102120539B (en) * | 2010-12-30 | 2013-09-04 | 沈阳博林特电梯股份有限公司 | Electromagnetic wedge-shaped bidirectional rope gripper |
| CN105110131A (en) * | 2015-09-25 | 2015-12-02 | 黄波 | Elevator electromagnetic braking device and operation method thereof |
| CN205367379U (en) * | 2016-01-20 | 2016-07-06 | 韩伍林 | Wire holder |
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Effective date of registration: 20170824 Address after: High tech Zone of Hebei province Shijiazhuang City Xinshi road 050000 No. 375 Applicant after: Shijiazhuang Wulon brake Co., Ltd Address before: Hebei province Shijiazhuang City Xinshi road 050000 No. 375 stone building C block 501 Wulong brake Limited by Share Ltd Applicant before: Han Wulin |
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