CN214569907U - Overspeed protection device for elevator - Google Patents
Overspeed protection device for elevator Download PDFInfo
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- CN214569907U CN214569907U CN202120572885.8U CN202120572885U CN214569907U CN 214569907 U CN214569907 U CN 214569907U CN 202120572885 U CN202120572885 U CN 202120572885U CN 214569907 U CN214569907 U CN 214569907U
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Abstract
The application discloses an elevator overspeed protection device, which comprises a speed limiting device, a speed limiting device steel wire rope guide wheel, a lifting linkage mechanism, a speed limiting device steel wire rope and a braking device; the speed limiting device is fixed on the bottom pit or a guide rail at the bottom; a steel wire rope guide wheel of the speed limiting device is fixed on a guide rail or a top beam at the top; the braking device is arranged on the suspension cage and matched with the guide rail on the well; the lifting linkage mechanism is arranged on the suspension cage and comprises a rotating shaft arranged on the suspension cage, a swinging arm connected with the braking device is arranged on the rotating shaft, a lifting arm is also arranged on the rotating shaft, a steel wire rope of the speed limiting device is wound on a steel wire rope guide wheel of the speed limiting device and a rope wheel of the speed limiting device, and two ends of the steel wire rope of the speed limiting device are connected with the lifting arm. The utility model discloses construction elevator in the well is mainly applicable to, separately sets up speed limit and arresting gear, easy to assemble maintenance and the operation that resets.
Description
Technical Field
The utility model relates to a lift field, concretely relates to lift overspeed protection device.
Background
The existing overspeed protection device of a construction elevator adopts an anti-falling safety device which is a pure mechanical sealing structure, a centrifugal speed limiting device and a conical drum brake in the anti-falling safety device are complex in structure and inconvenient to install and reset, the reliability of the anti-falling safety device can only be verified through experiments after installation, people cannot be carried in a suspension cage during experiments, the anti-falling safety device can be reset only by an additional ascending platform after the braking reset, the anti-falling safety clamp is the only anti-falling measure of the construction elevator, the overall safety and reliability are low, the speed limiting and brake are inconvenient to overhaul and maintain, and the resetting after experiments is complex.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above problem, overcome at least one not enough, provide an elevator overspeed protection device.
The utility model adopts the following technical scheme:
an elevator overspeed protection device is characterized in that the elevator is a traction machine underneath type elevator, the elevator comprises guide rails arranged on the side wall of a hoistway and a suspension cage capable of moving up and down, and the elevator overspeed protection device comprises a speed limiting device, a speed limiting device steel wire rope guide wheel, a lifting linkage mechanism, a speed limiting device steel wire rope and a braking device;
the speed limiting device is fixed on the pit or the guide rail at the bottom;
the speed limiting device steel wire rope guide wheel is fixed on a guide rail or a top beam at the top;
the braking device is arranged on the suspension cage and matched with a guide rail on the well;
the lifting linkage mechanism is arranged on the suspension cage and comprises a rotating shaft arranged on the suspension cage, a swinging arm connected with the braking device is arranged on the rotating shaft, a lifting arm is further arranged on the rotating shaft, the steel wire rope of the speed limiting device is wound on a steel wire rope guide wheel of the speed limiting device and a rope wheel of the speed limiting device, and two ends of the steel wire rope of the speed limiting device are connected with the lifting arm.
When the speed limiting device is actually used, the speed limiting device can be fixed on a guide rail at the bottom through a support and a pressing plate, or a base of the speed limiting device is fixed on the ground of a pit through an expansion screw; during actual use, the steel wire rope guide wheel of the speed limiting device can be fixed on the guide rail at the top through the support and the pressing plate, and the limiting block is fixed at the top of the support to prevent the steel wire rope guide wheel of the speed limiting device from falling. In practice, the mounting on the cage means mounting on a cage frame, such as an upper beam or a lower beam of the cage. The speed limiting device of this application is current speed limiting device, and the system of this application stops the device for current system and stops the device.
The working principle of the overspeed protection device of the elevator is as follows: when the suspension cage is overspeed, the speed limiting device works to clamp the steel wire rope of the speed limiting device, and simultaneously sends a signal to the control cabinet, so that the suspension cage stops. The utility model discloses construction elevator in the well is mainly applicable to, separately sets up speed limit and arresting gear, easy to assemble maintenance and the operation that resets. The installation position of the speed limiting device is close to the position of an electric control cabinet of the tractor, so that the length of a connecting cable is reduced.
In one embodiment of the present invention, the lifting arm is provided with an upper heart ring and a lower heart ring, one end of the wire rope of the speed limiting device is connected to the upper heart ring, the other end of the wire rope of the speed limiting device is connected to the lower heart ring, and the wire rope of the speed limiting device ties up and fixes the rope end of the nest return with the body through the rope clamp; the swinging arm is connected with a wedge block of the braking device, the swinging arm is assembled with the rotating shaft through a pin shaft, and the rotating angle of the swinging arm on the rotating shaft can be adjusted;
the rotating shaft is also fixedly provided with a rotating part, the lifting linkage mechanism comprises two rotating shafts and a connecting rod assembly, two ends of the connecting rod assembly are respectively hinged and matched with the rotating part corresponding to the rotating shafts, and the rotating parts of the connecting rod assembly, the two rotating shafts and the cage hanging frame) form a four-bar linkage mechanism:
the connecting rod assembly comprises two branch rods which are nested with each other, a compression spring capable of adjusting the compression amount is installed between the two branch rods, and the two branch rods are combined together through a screw column.
In one embodiment of the present invention, the speed limiting device includes:
the base is fixed on the pit or the guide rail at the bottom;
the guide rod is fixed with the base;
the movable frame is slidably mounted on the guide rod, a speed limiter assembly is mounted on the movable frame, the speed limiter assembly adopts a cam friction type or centrifugal throw block clamping type working principle, and comprises a rope wheel;
the balancing weight is fixed at the upper end of the movable frame;
and the electrical switch is arranged on the base or the movable frame, and when the suspension cage exceeds the speed, the speed limiter assembly works to clamp the steel wire rope of the speed limiting device and trigger the electrical switch.
The overspeed governor subassembly of this application is current overspeed governor, can be friction formula or centre gripping formula. The speed limiting device is used for tensioning a steel wire rope of the speed limiting device through a balancing weight.
In one of the embodiments of the utility model, the last extension limit switch that has of overspeed governor component, extension limit switch passes through the support and fixes to the guide bar on for control speed limiter wire rope's extension volume, when speed limiter wire rope's extension volume has exceeded the setting value, extension limit switch is triggered by the adjustable shelf, and then makes cage bring to rest.
In one embodiment of the present invention, the electrical verification switch is installed on the suspension cage or the lifting linkage mechanism, and when the swing arm rotates to drive the braking device, the swing arm drives the rotation shaft to rotate, and triggers the electrical verification switch, so as to cut off the power of the elevator control system, and the suspension cage relies on the inertia of the four-bar linkage mechanism to lift and pull to make the braking device brake the guide rail, so as to stop the suspension cage.
In one embodiment of the present invention, the stopping device is a progressive or instantaneous structure.
The speed limiting device is the existing speed limiting device, can adopt pendulum bob friction type or centrifugal throw piece clamping type principle, after overspeed, the centrifugal throw piece of the speed limiting device touches its hair-holding arm to move, the wire rope of the speed limiting device in the rope sheave of the speed limiting device is clamped on the rope sheave, or after overspeed, the amplitude of the pendulum bob swinging on its curve cam is greater than the normal amplitude, the swing arm of the pendulum bob is clamped in the ratchet groove of the speed limiting device to lock, trigger the electric switch of the action verification at the same time, the cage control system stops after receiving the signal of the electric switch; under the action of inertia force, a braking device fixed on the suspension cage continues to operate inertially, and both a speed limiting device and a steel wire rope of the speed limiting device are in a stopped state at the moment, a lifting arm drives a rotating shaft and a swinging arm to rotate under the action of the steel wire rope of the speed limiting device, the swinging arm drives a wedge-shaped block of the braking device to move, and a gap between the wedge-shaped block and a guide surface of a guide rail is eliminated, so that the suspension cage is braked on the guide rail, an electrical verification switch of a lifting linkage mechanism is triggered when the braking device is braked, and a control system receives a power-off shutdown signal for the second time at the moment.
The application also discloses another elevator overspeed protection device, wherein the elevator is a tractor overhead elevator, the elevator comprises a guide rail arranged on the side wall of a hoistway and a suspension cage capable of moving up and down, and the elevator overspeed protection device comprises a speed limiting device, a tensioning device, a lifting linkage mechanism, a speed limiting device steel wire rope and a braking device;
the speed limiting device is fixed on the top guide rail or the top beam;
the tensioning device is fixed on a guide rail at the bottom or on the ground of a pit;
the braking device is arranged on the suspension cage and matched with a guide rail on the well;
the lifting linkage mechanism is arranged on the suspension cage and comprises a rotating shaft arranged on the suspension cage, a swinging arm connected with the braking device is arranged on the rotating shaft, a lifting arm is further arranged on the rotating shaft, the steel wire rope of the speed limiting device is wound on the rope wheel of the tensioning device and the rope wheel of the speed limiting device, and two ends of the steel wire rope of the speed limiting device are connected with the lifting arm.
When the speed limiting device is actually used, the speed limiting device can be fixed on the top guide rail through the bracket and the pressing plate or fixed on the top beam through the bracket; in actual use, the tensioning device is fixed on the guide rail at the bottom through the bracket and the pressing plate.
In one embodiment of the present invention, the lifting arm is provided with an upper heart ring and a lower heart ring, one end of the wire rope of the speed limiting device is connected to the upper heart ring, the other end of the wire rope of the speed limiting device is connected to the lower heart ring, and the wire rope of the speed limiting device ties up and fixes the rope end of the nest return with the body through the rope clamp; the swing arm is connected with a wedge block of the braking device, the swing arm is assembled with the rotating shaft through a pin shaft, and the rotating angle of the swing arm on the rotating shaft can be adjusted
Still be fixed with the rotation piece on the axis of rotation, carry and draw link gear to include two axis of rotation and a link assembly, link assembly's both ends respectively with correspond the rotation piece articulated cooperation of axis of rotation, the rotation piece and the cage of link assembly, two axes of rotation form four-bar linkage:
the connecting rod assembly comprises two branch rods which are nested with each other, a compression spring capable of adjusting the compression amount is installed between the two branch rods, and the two branch rods are combined together through a screw column.
In one embodiment of the present invention, the tensioning device has an extension limit switch, and when the extension amount of the steel wire rope of the speed limiting device exceeds a set value, the tensioning device triggers the extension limit switch fixed on the guide rail to act, so that the elevator control system is powered off, and the cage stops operating; the lifting linkage mechanism on the lifting cage is provided with an electrical verification switch, when the swinging arm rotates to drive the braking device to work, the swinging arm drives the rotating shaft to rotate to trigger the electrical verification switch, so that the elevator control system is powered off, the lifting cage is stopped, and the electrical verification switch of the lifting mechanism and the extension limit switch of the speed limiting device form double protection.
In one embodiment of the present invention, the tensioning device is a weight type or a swing rod type structure; the stopping device is of a progressive or instantaneous structure.
This application speed limiting device and braking pincers separately set up, have set up a plurality of switch control simultaneously, when easy to assemble overhauls and the operation that resets, fail safe nature further improves.
The utility model has the advantages that: the working principle of the overspeed protection device of the elevator is as follows: when the suspension cage is overspeed, the speed limiting device works to clamp the steel wire rope of the speed limiting device, and simultaneously sends a signal to the control cabinet, so that the suspension cage stops. The utility model discloses construction elevator in the well is mainly applicable to, separately sets up speed limit and arresting gear, easy to assemble maintenance and the operation that resets.
Description of the drawings:
FIG. 1 is a schematic view of an overspeed protection apparatus of an elevator of embodiment 1;
FIG. 2 is a schematic view of a governor device according to embodiment 1;
FIG. 3 is a schematic view of a lifting linkage;
FIG. 4 is a schematic view of an overspeed protection apparatus of an elevator of embodiment 2;
FIG. 5 is another illustration of the overspeed protection apparatus of an elevator of embodiment 2;
fig. 6 is a schematic diagram of a governor assembly and an appliance switch;
fig. 7 is a schematic view of another angle of the governor assembly and appliance switch.
The figures are numbered:
1. a guide rail; 2. a pit; 3. a suspension cage; 4. a speed limiting device; 5. a steel wire rope guide wheel of the speed limiting device; 6. a lifting linkage mechanism; 7. a steel wire rope of the speed limiting device; 8. a stopping device; 9. a rotating shaft; 10. a swing arm; 11. lifting the arm; 12. putting on a chicken heart ring; 13. placing a chicken heart ring; 14. rope clips; 15. a rotating member; 16. a connecting rod assembly; 17. separating rods; 18. A pressure spring; 19. a base; 20. a guide bar; 21. a movable frame; 22. a governor assembly; 23. a balancing weight; 24. an electrical switch; 25. a limit switch is extended; 26. an electrical verification switch; 27. a tensioning device; 28. a sheave; 29. a rope clamp; 30. a ratchet mechanism; 31. throwing blocks; 32. a connecting rod; 33. a return spring; 34. a swing rod switch; 35. a swing link.
The specific implementation mode is as follows:
the present invention will be described in detail with reference to the accompanying drawings.
Example 1
As shown in fig. 1 to 3, an elevator overspeed protection device, which is a traction machine underneath type elevator, comprises a guide rail 1 arranged on a side wall of a hoistway and a suspension cage 3 capable of moving up and down, and comprises a speed limiting device 4, a speed limiting device steel wire rope guide wheel 5, a lifting linkage mechanism 6, a speed limiting device steel wire rope 7 and a braking device 8;
the speed limiting device 4 is fixed on the pit 2 or on the guide rail 1 of the pit 2;
a steel wire rope guide wheel 5 of the speed limiting device is fixed on a guide rail 1 or a top beam at the top;
the braking device 8 is arranged on the suspension cage 3 and is matched with the guide rail 1 on the well;
the lifting linkage mechanism 6 is arranged on the suspension cage 3, the lifting linkage mechanism 6 comprises a rotating shaft 9 which is rotatably arranged on the suspension cage 3, a swing arm 10 connected with the braking device 8 is arranged on the rotating shaft 9, a lifting arm 11 is also arranged on the rotating shaft 9, a speed-limiting device steel wire rope 7 is wound on a speed-limiting device steel wire rope guide wheel 5 and a rope wheel 28 of the speed-limiting device 4, and two ends of the speed-limiting device steel wire rope 7 are connected with the lifting arm 11.
When in actual use, the speed limiting device 4 can be fixed on the guide rail 1 of the pit 2 through a bracket and a pressure plate, or the base 19 of the speed limiting device is fixed on the ground of the pit 2 through an expansion screw; during actual application, the steel wire rope guide wheel 5 of the speed limiting device can be fixed on the guide rail 1 at the top through the support and the pressing plate, and the limiting block is fixed at the top of the support to prevent the steel wire rope guide wheel 5 of the speed limiting device from falling. In this embodiment, mounted on the cage 3 means mounted on the upper or lower beam of the cage 3. The governor 4 of the present application is a conventional governor 4, and the braking device 8 of the present application is a conventional braking device 8 (e.g., a brake caliper).
The working principle of the overspeed protection device of the elevator is as follows: when the suspension cage 3 is overspeed, the speed limiting device 4 works to clamp the steel wire rope 7 of the speed limiting device, and simultaneously sends a signal to the control cabinet, the suspension cage 3 stops, the braking device 8 fixed on the suspension cage 3 continues to operate inertially due to the action of inertia force, at the moment, the speed limiting device 4 and the steel wire rope 7 of the speed limiting device are both in a stop state, under the action of the steel wire rope 7 of the speed limiting device, the lifting arm 11 drives the rotating shaft 9 and the swinging arm 10 to rotate, and the swinging arm 10 drives the wedge block of the braking device 8 to move, so that the gap between the wedge block and the guide surface of the guide rail 1 is eliminated, and the suspension cage 3 is braked on the guide rail 1. The utility model discloses construction elevator in the well is mainly applicable to, separately sets up speed limit and arresting gear, easy to assemble maintenance and the operation that resets. The installation position of the speed limiting device 4 is close to the position of an electric control cabinet of the tractor, so that the length of a connecting cable is reduced.
As shown in fig. 1 and 3, in the present embodiment, an upper heart ring 12 and a lower heart ring 13 are mounted on the lifting arm 11, one end of the speed-limiting device steel wire rope 7 is connected to the upper heart ring 12, the other end of the speed-limiting device steel wire rope 7 is connected to the lower heart ring 13, and the rope end of the returning rope is tied and fixed to the body of the speed-limiting device steel wire rope 7 through the rope clamp 14; the swing arm 10 is connected with a wedge block of the braking device 8, the swing arm is assembled with the rotating shaft through a pin shaft, and the rotating angle of the swing arm on the rotating shaft can be adjusted;
still be fixed with on the axis of rotation 9 and rotate piece 15, carry and draw link gear 6 to include two axis of rotation 9 and a link assembly 16, link assembly 16's both ends respectively with correspond the articulated cooperation of the rotation piece 15 of axis of rotation, link assembly 16, the rotation piece 15 and cage 3 (cage frame) of two axes of rotation form four-bar linkage:
the connecting rod assembly 16 comprises two branch rods 17 which are nested with each other, and a pressure spring 18 which can adjust the compression amount is arranged between the two branch rods 17.
As shown in fig. 2, in the present embodiment, the speed limiting device 4 includes:
the base 19 is used for being fixed on the pit 2 or the guide rail 1 of the pit 2;
a guide rod 20 fixed to the base 19;
a movable frame 21 which is slidably arranged on the guide rod 20, and is provided with a speed limiter assembly 22 which comprises a rope wheel 28;
the counterweight block 23 is fixed at the upper end of the movable frame 21 and is used for tensioning the steel wire rope 7 of the speed limiting device;
and an electrical switch 24 is arranged on the base or the movable frame, and when the suspension cage exceeds the speed, the speed limiter assembly works to clamp the steel wire rope of the speed limiting device and trigger the electrical switch.
The speed limiter assembly is an existing speed limiter assembly, can adopt a cam friction type or centrifugal flail block clamping type working principle, and as shown in fig. 6 and 7, the existing clamping type speed limiter assembly mainly comprises a rope wheel 28, a rope clamping device 29, a ratchet mechanism 30, a flail block 31, a connecting rod 32, a return spring 33, a swing rod switch 34 and other structures, wherein the flail blocks 31 are symmetrically fixed at the edges of two ends of the rope wheel 28, and the flail blocks 31 are connected in series through the connecting rod 32 and the return spring 33; the swing rod switch 34 is connected with the swinging block 31, after the suspension cage runs at an overspeed, the swinging block 31 triggers the swing rod switch 34 to beat a plate under the action of centrifugal force to clamp the ratchet mechanism 30, and the ratchet mechanism 30 drives the swing rod 35 of the rope clamp 29 to act to clamp a steel wire rope and trigger the electrical switch 24 at the same time.
In this embodiment, the speed limiter assembly 22 has an extension limit switch 25, and the extension limit switch 25 is fixed to the guide rod 20 through a bracket and is used for monitoring the extension amount of the steel wire rope of the speed limiter, and when the extension amount of the steel wire rope of the speed limiter exceeds a set value, the extension limit switch 25 is triggered by the movable frame 21, so that the cage stops operating.
In this embodiment, an electrical verification switch 26 is installed on the cage 3 or the lifting linkage mechanism 6, when the swing arm rotates to drive the braking device to work, the swing arm drives the rotating shaft to rotate to trigger the electrical verification switch, so that the elevator control system is powered off, and the cage is lifted by means of inertia of the four-bar linkage mechanism to drive the braking device to be braked on the guide rail, so that the cage stops running.
In the present embodiment, the braking device 8 is of a progressive or instantaneous structure.
The speed-limiting device 4 can adopt a pendulum bob friction type or centrifugal swing block clamping type principle, when the centrifugal swing block of the speed-limiting device 4 touches the hair clip holding arm of the speed-limiting device to act after overspeed, a steel wire rope 7 of the speed-limiting device in a rope wheel of the speed-limiting device 4 is clamped on the rope wheel, or the swing amplitude of the pendulum bob on a curve cam of the pendulum bob is larger than the normal amplitude after overspeed, the swing arm of the pendulum bob is clamped in a ratchet groove of the speed-limiting device 4 to lock, and simultaneously an electrical switch for action verification is triggered, and a control system of the cage 3 stops after receiving a signal of the electrical switch; under the action of inertia force, the braking and stopping device 8 fixed on the suspension cage 3 continues to operate inertially, at the moment, the speed limiting device 4 and the speed limiting device steel wire rope 7 are both in a stopping state, under the action of the speed limiting device steel wire rope 7, the lifting arm 11 drives the rotating shaft 9 and the swinging arm 10 to rotate, the swinging arm 10 drives the wedge-shaped block of the braking and stopping device 8 to move, the gap between the wedge-shaped block and the guide surface of the guide rail 1 is eliminated, so that the suspension cage 3 is braked on the guide rail 1, when the braking and stopping device 8 is braked, the electrical verification switch 26 of the lifting and stopping linkage mechanism is triggered, and at the moment, the control system receives a power-off and stopping signal secondarily.
This application speed limiting device 4 and braking pincers separately set up, have set up a plurality of switch control simultaneously, when easy to assemble overhauls and the operation that resets, and fail safe nature further improves.
Example 2
As shown in fig. 4 and 5, the present application further discloses another elevator overspeed protection device, wherein the elevator is a tractor overhead elevator, the elevator comprises a guide rail 1 arranged on a sidewall of a hoistway and a cage 3 capable of moving up and down, and the elevator overspeed protection device comprises a governor 4, a tensioner 27, a lifting linkage mechanism 6, a governor rope 7 and a braking device 8;
the speed limiting device 4 is fixed on the top guide rail 1 or the top beam;
the tensioning device 27 is fixed on the guide rail 1 at the bottom or on the ground of a pit;
the braking device 8 is arranged on the suspension cage 3 and is matched with the guide rail 1 on the well;
the lifting linkage mechanism 6 is arranged on the suspension cage 3, the lifting linkage mechanism 6 comprises a rotating shaft 9 which is rotatably arranged on the suspension cage 3, a swing arm 10 connected with the braking device 8 is arranged on the rotating shaft 9, a lifting arm 11 is also arranged on the rotating shaft 9, a steel wire rope 7 of the speed limiting device is wound on a steel wire rope wheel of the tensioning device 27 and the steel wire rope wheel of the speed limiting device 4, and two ends of the steel wire rope 7 of the speed limiting device are connected with the lifting arm 11.
When in actual use, the speed limiting device 4 can be fixed on the top guide rail 1 through a bracket and a pressure plate or fixed on the top beam through the bracket; in actual use, the tensioning device 27 is fixed on the bottom guide rail 1 through a bracket and a pressing plate.
In the present embodiment, the pulling and pulling interlocking mechanism 6 is the same as in embodiment 1.
In this embodiment, the tensioning device 27 has an extension limit switch 25, and when the extension amount of the steel wire rope of the speed limiting device exceeds a set value, the tensioning device 27 triggers the extension limit switch 25 fixed on the guide rail to act, so that the elevator control system is powered off, and the cage stops running; when the swinging arm rotates to drive the braking device to work, the swinging arm drives the rotating shaft to rotate to trigger the electrical verification switch, so that the elevator control system is powered off, the suspension cage stops, and the electrical verification switch of the lifting mechanism and the extension limit switch of the speed limiting device form double protection.
In this embodiment, the tensioning device 27 is of a weight-hammer type (see fig. 5) or a pendulum-rod type structure (see fig. 4); the braking device 8 is of progressive or instantaneous construction.
The above is only the preferred embodiment of the present invention, and not the patent protection scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings of the present invention can be directly or indirectly applied to other related technical fields, and all the same principles are included in the protection scope of the present invention.
Claims (10)
1. An elevator overspeed protection device, the said elevator is the elevator of the underneath type of the traction machine, the elevator includes the guide rail set up in sidewall of well and cage that can move up and down, characterized by that, the elevator overspeed protection device includes the speed-limiting device, wire rope guide pulley of the speed-limiting device, draws the link gear, wire rope of the speed-limiting device and stops the device;
the speed limiting device is fixed on the pit or the guide rail at the bottom;
the speed limiting device steel wire rope guide wheel is fixed on a guide rail or a top beam at the top;
the braking device is arranged on the suspension cage and matched with a guide rail on the well;
the lifting linkage mechanism is arranged on the suspension cage and comprises a rotating shaft arranged on the suspension cage, a swinging arm connected with the braking device is arranged on the rotating shaft, a lifting arm is further arranged on the rotating shaft, the steel wire rope of the speed limiting device is wound on a steel wire rope guide wheel of the speed limiting device and a rope wheel of the speed limiting device, and two ends of the steel wire rope of the speed limiting device are connected with the lifting arm.
2. The elevator overspeed protection device as claimed in claim 1, wherein the lifting arm is provided with an upper heart ring and a lower heart ring, one end of the speed-limiting device steel wire rope is connected with the upper heart ring, the other end of the speed-limiting device steel wire rope is connected with the lower heart ring, and the rope end of the rope loop is tied and fixed with the body of the rope loop through a rope clamp; the swinging arm is connected with a wedge block of the braking device, the swinging arm is assembled with the rotating shaft through a pin shaft, and the rotating angle of the swinging arm on the rotating shaft can be adjusted;
still be fixed with the rotation piece on the axis of rotation, carry and draw link gear to include two axis of rotation and a link assembly, link assembly's both ends respectively with correspond the rotation piece articulated cooperation of axis of rotation, the rotation piece and the cage of link assembly, two axes of rotation form four-bar linkage:
the connecting rod assembly comprises two branch rods which are nested with each other, a compression spring capable of adjusting the compression amount is installed between the two branch rods, and the two branch rods are combined together through a screw column.
3. The elevator overspeed protection device of claim 2 wherein said governor means comprises:
the base is fixed on the pit or the guide rail at the bottom;
the guide rod is fixed with the base;
the movable frame is slidably mounted on the guide rod, a speed limiter assembly is mounted on the movable frame, the speed limiter assembly adopts a cam friction type or centrifugal throw block clamping type working principle, and comprises a rope wheel;
the balancing weight is fixed at the upper end of the movable frame;
and the electrical switch is arranged on the base or the movable frame, and when the suspension cage exceeds the speed, the speed limiter assembly works to clamp the steel wire rope of the speed limiting device and trigger the electrical switch.
4. The elevator overspeed protection device of claim 3 wherein said governor assembly has an extension limit switch attached thereto by a bracket to a guide bar for monitoring the extension of the governor rope, wherein the extension limit switch is triggered by the movable frame when the extension of the governor rope exceeds a predetermined value to stop the cage.
5. The elevator overspeed protection device of claim 4 wherein an electrical verification switch is mounted on said cage or said lifting linkage, said swing arm rotates said pivot shaft to activate said electrical verification switch when said swing arm rotates to operate said brake, thereby de-energizing said elevator control system, said cage being lifted by inertia of said four-bar linkage to cause said brake to stop on said guide rail, thereby stopping said cage.
6. An elevator overspeed protection device as set forth in claim 1 wherein said arrest means is of progressive or instantaneous construction.
7. An elevator overspeed protection device, the said elevator is the overhead hoist of the hauling machine, the said elevator includes the guide rail set up in sidewall of well and cage that can move up and down, characterized by that, the elevator overspeed protection device includes the speed-limiting device, overspeed device tensioner, draws and draws the link gear, steel wire rope of speed-limiting device and stops the device;
the speed limiting device is fixed on the top guide rail or the top beam;
the tensioning device is fixed on a guide rail at the bottom or on the ground of a pit;
the braking device is arranged on the suspension cage and matched with a guide rail on the well;
the lifting linkage mechanism is arranged on the suspension cage and comprises a rotating shaft arranged on the suspension cage, a swinging arm connected with the braking device is arranged on the rotating shaft, a lifting arm is further arranged on the rotating shaft, the steel wire rope of the speed limiting device is wound on the rope wheel of the tensioning device and the rope wheel of the speed limiting device, and two ends of the steel wire rope of the speed limiting device are connected with the lifting arm.
8. The elevator overspeed protection device as claimed in claim 7, wherein the lifting arm is provided with an upper heart ring and a lower heart ring, one end of the speed-limiting device steel wire rope is connected with the upper heart ring, the other end of the speed-limiting device steel wire rope is connected with the lower heart ring, and the rope end of the rope loop is tied and fixed with the body of the rope loop through a rope clamp; the swinging arm is connected with a wedge block of the braking device, the swinging arm is assembled with the rotating shaft through a pin shaft, and the rotating angle of the swinging arm on the rotating shaft can be adjusted;
still be fixed with the rotation piece on the axis of rotation, carry and draw link gear to include two axis of rotation and a link assembly, link assembly's both ends respectively with correspond the rotation piece articulated cooperation of axis of rotation, the rotation piece and the cage of link assembly, two axes of rotation form four-bar linkage:
the connecting rod assembly comprises two branch rods which are nested with each other, a compression spring capable of adjusting the compression amount is installed between the two branch rods, and the two branch rods are combined together through a screw column.
9. The elevator overspeed protection device of claim 7 wherein said tensioner has an extension limit switch, and when the extension of the rope of the governor exceeds a predetermined value, the tensioner triggers said extension limit switch attached to the guide rail to activate, thereby de-energizing the elevator control system and stopping the cage; the lifting linkage mechanism on the lifting cage is provided with an electrical verification switch, when the swinging arm rotates to drive the braking device to work, the swinging arm drives the rotating shaft to rotate to trigger the electrical verification switch, so that the elevator control system is powered off, the lifting cage is stopped, and the electrical verification switch of the lifting mechanism and the extension limit switch of the speed limiting device form double protection.
10. The elevator overspeed protection device of claim 9 wherein said tensioner is of a weight-hammer or pendulum-rod type construction; the stopping device is of a progressive or instantaneous structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120572885.8U CN214569907U (en) | 2021-03-19 | 2021-03-19 | Overspeed protection device for elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120572885.8U CN214569907U (en) | 2021-03-19 | 2021-03-19 | Overspeed protection device for elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214569907U true CN214569907U (en) | 2021-11-02 |
Family
ID=78320869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120572885.8U Active CN214569907U (en) | 2021-03-19 | 2021-03-19 | Overspeed protection device for elevator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214569907U (en) |
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2021
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