CN112279034B - Elevator safety tongs - Google Patents
Elevator safety tongs Download PDFInfo
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- CN112279034B CN112279034B CN202011144181.7A CN202011144181A CN112279034B CN 112279034 B CN112279034 B CN 112279034B CN 202011144181 A CN202011144181 A CN 202011144181A CN 112279034 B CN112279034 B CN 112279034B
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- sleeve
- lifting rod
- wedge block
- sliding
- rod
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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
- B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
- B66B5/044—Mechanical overspeed governors
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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
- B66B5/22—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 means of linearly-movable wedges
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Types And Forms Of Lifts (AREA)
Abstract
The utility model provides an elevator safety tongs, two sets of brake wedge subassembly have been included, and set up the linkage cover on a set of brake wedge subassembly, the linkage cover connects the first and the second of the pull rod of the two sets of brake wedge subassemblies of drive, the combined action through the interior cover of taking the internal screw thread and the helical guideway outside the interior cover makes the action of pulling of pull rod one smooth and easy, gentle transformation is for pulling of pull rod two, make the braking that the movable wedge can be gentle when braking the guide rail down, the braking impact has been reduced, when increasing safety tongs braking effect, the equipment loss has been reduced.
Description
Technical Field
The invention relates to the technical field of elevators, in particular to an elevator safety gear.
Background
With the popularization of elevators, the safety performance of the elevators becomes a concern for large elevator manufacturers, and in order to ensure the safety of the elevators, the elevators generally comprise safety tongs. As the speed of an elevator becomes faster, a progressive safety gear becomes a mainstream safety gear gradually, but the conventional progressive safety gear is operated singly, the heat generated during braking is high, the braking regulation range is small, and a good braking effect is difficult to be achieved for various overspeed conditions, so that patent document 1 discloses an emergency braking device of an elevator and the elevator, the emergency braking device connects at least two safety gears in series to jointly brake a guide rail to achieve the purpose of safety braking, the two safety gears are jointly lifted by a lifting rod 12, the gap size L1 between an upper braking member and the guide rail is smaller than the gap size L2 between a lower braking member 42 and the guide rail, so that the upper braking member and the lower braking member are successively braked, the braking performance of each braking device is fully exerted, but the gap between the upper braking member and the lower braking member needs to be adjusted each time when the elevator is installed, the operation is complicated and the precision is not high, in addition, the time for adding the brake to the lower brake part is not controllable, the action process is sudden when the lower brake part is added to the brake, and the impact on the lower brake part is large; for another example, patent document 2 discloses an elevator safety gear, in which a lower gear capable of acting together is added on the basis of an upper gear in the conventional progressive safety gear form, and in the braking process, the two gears brake together to increase the braking friction area and improve the braking effect, but the lower gear is driven to brake through a lower pull rod 42 with a strip-shaped hole, the lower gear only acts after the upper gear brakes for a certain distance, the lower gear does not act synchronously with the upper gear, and the lower gear only acts when an upper pin 411 abuts against the upper end of a strip-shaped hole, so that the intervention braking action is sudden, the impact on a lower movable wedge 32, a lower pull rod 42 and a guide rail 5 is large, the problem of safety gear impact is introduced when the braking effect is improved, the service life of the safety gear is prolonged, and the influence of unnecessary noise is introduced.
[ patent document 1] CN 104583111A;
[ patent document 2] CN 105905740A.
In summary, although the safety tongs of the conventional safety elevator are used in a linkage manner, the lower safety tongs are suddenly added with braking action, the adding action speed of the lower safety tongs is the same as that of the upper safety tongs, the action speed of the lower safety tongs cannot be adjusted, and the action impact of the lower safety tongs is large, the safety elevator provided by the application also uses the two safety tongs to act, a linkage sleeve is sleeved on the first lifting rod, the upper end of the second lifting rod is connected to the linkage sleeve, the lifting speed of the second lifting rod is slower than that of the first lifting rod while the first lifting rod and the second lifting rod are synchronously lifted through the linkage sleeve, the linkage sleeve uses a spiral guide rail structure, the lifting action of the first lifting rod is transmitted to the second lifting rod after passing through a similar speed reducing mechanism, and meanwhile, the lower safety tongs can slowly contact with the guide rail, and the guide rail cannot be suddenly braked to generate impact, so that the service life of the safety tongs can be prolonged while the actions of the two safety tongs are ensured.
Disclosure of Invention
In order to overcome the defects of the conventional elevator safety tongs, the invention provides a technical scheme, the elevator safety tongs comprise an upper brake wedge block assembly and a lower brake wedge block assembly, the lower brake wedge block assembly is arranged at the lower end of the upper brake wedge block assembly, the elevator safety tongs further comprise a linkage sleeve, the linkage sleeve is arranged at the upper end of the upper brake wedge block assembly, the linkage sleeve comprises a barrel, an inner sleeve, a spiral guide rail and an extension rod, the inner sleeve is rotatably arranged at the inner side of the barrel, inner threads are arranged at the inner side of the inner sleeve, the spiral guide rail is arranged around the inner sleeve and can rotate along with the rotation of the inner sleeve, one end of the extension rod is sleeved on the inner sleeve, the other end of the extension rod is connected with a lifting rod II, the middle of the extension rod II is abutted against the spiral guide rail, the lifting rod I is meshed with the inner threads at the inner side of the linkage sleeve through external threads, the lifting rod I penetrates through the linkage sleeve and then is connected with the upper brake wedge block assembly, the lifting rod II is connected with the lower brake wedge block assembly, the lifting rod I drives the lifting rod to synchronously move through the linkage sleeve, and the lifting speed of the second lifting rod is lower than that of the first lifting rod.
Preferably, the linkage cover still includes the roof, the lower plate, sliding sleeve and lifting rod connector, the endotheca is coaxial to be set up inside the barrel, the upper end and the lower extreme of endotheca are fixedly connected with roof and lower plate respectively, roof and lower plate can rotate for the barrel, helical guideway's both ends are fixed respectively on roof and lower plate, the sliding sleeve slides and sets up in the outer end of endotheca, extension bar left end fixedly connected in the right-hand member of sliding sleeve, extension bar right-hand member fixedly connected with is used for carrying out the lifting rod connector of being connected with two lifting rods, the barrel is provided with vertical guide slot at the right-hand member, vertical guide slot is worn out to the extension bar, thereby vertical guide slot can guide the extension bar and follow vertical direction up-and-down motion, the roof, all be provided with on the lower plate and pass the hole.
Preferably, the linkage sleeve further comprises an upper top plate, a lower bottom plate, a sliding sleeve, an outer sleeve and a pre-tightening spring, the inner sleeve is coaxially arranged inside the cylinder body, the upper end and the lower end of the inner sleeve are fixedly connected with the upper top plate and the lower bottom plate respectively, the upper top plate and the lower bottom plate can rotate relative to the cylinder body, two ends of the spiral guide rail are fixed on the upper top plate and the lower bottom plate respectively, the sliding sleeve is arranged at the outer end of the inner sleeve in a sliding manner, the left end of the extension rod is fixedly connected with the right end of the sliding sleeve, the right end of the extension rod is fixedly connected with a lifting rod connector used for being connected with a lifting rod II, the cylinder body is provided with a vertical guide groove at the right end, the extension rod penetrates out of the vertical guide groove, so that the vertical guide groove can guide the extension rod to move up and down along the vertical direction, the extension rod is abutted against the spiral guide rail, the upper top plate and the lower bottom plate are provided with through holes, the cylinder body is sleeved in the outer sleeve in a sliding manner, and the pre-tightening spring is fixedly arranged between the upper frame body top plate and the cylinder body, the upper end of the barrel is provided with a limiting guide block, the outer sleeve is provided with a limiting guide groove, and the limiting guide block slides up and down along the limiting guide groove.
Preferably, the pitch of the helical guide is greater than the pitch of the internal thread.
Preferably, the upper brake wedge assembly includes an upper frame, and the linkage sleeve is mounted to an inner side or an outer side of the upper frame.
Preferably, a connecting end is further arranged on the top plate of the upper frame body, and the cylinder body is detachably connected into the connecting end.
Preferably, a first bearing is arranged between the upper top plate and the cylinder, and a second bearing is arranged between the lower bottom plate and the cylinder.
Preferably, the spiral guide rail is a round rod, a flat strip or a structure consisting of two parallel round rods.
Preferably, the upper and lower brake wedge assemblies are of independent instantaneous and/or progressive safety gear construction.
Preferably, the upper brake wedge block assembly comprises an upper frame body, a buffer plate, a buffer spring, an adjusting bolt, an upper fixed wedge block, a first sliding block and an upper movable wedge block, wherein the buffer plate is horizontally and slidably arranged in the upper frame body, the adjusting bolt is arranged on the side edge of the upper frame body, one end of the buffer plate is abutted to the tail end of the adjusting bolt, the other end of the buffer plate is fixedly connected with one end of the buffer spring, the other end of the buffer spring is connected with the upper fixed wedge block, the upper fixed wedge block can horizontally slide in the upper frame body, the other end of the upper fixed wedge block is slidably provided with the first sliding block, the other end of the first sliding block is slidably connected with the upper movable wedge block, a first horizontally-arranged strip-shaped hole is formed in the upper movable wedge block, and a first lifting rod is connected with the upper movable wedge block through the strip-shaped hole; the lower braking wedge block assembly comprises a lower frame body, a lower fixed wedge block, a lower movable wedge block and a second sliding block, one end of the lower fixed wedge block is fixedly arranged on the inner side of the lower frame body, the other end of the lower fixed wedge block is movably connected with the second sliding block, the other end of the second sliding block is slidably connected with the lower movable wedge block, a second bar-shaped hole which is horizontally arranged is formed in the lower movable wedge block, and a second lifting rod is connected with the lower movable wedge block through the second bar-shaped hole.
Preferably, the external thread on the first lifting rod is arranged in a threaded sleeve structure.
The invention has the beneficial effects that:
1) the elevator safety tongs disclosed by the invention use two brake wedge block assemblies for action, the first lifting rod is sleeved with the linkage sleeve, the upper end of the second lifting rod is connected with the lifting rod connector of the linkage sleeve, the synchronous lifting of the first lifting rod and the second lifting rod is realized through the linkage sleeve, the lifting speed of the second lifting rod is slower than that of the first lifting rod, and the lower brake wedge block assembly can brake slower than that of the upper brake wedge block assembly without adjusting the clearance between the two brake wedges and the guide rail;
2) furthermore, the linkage sleeve comprises an inner sleeve with internal threads and a spiral guide rail which can rotate along with the inner sleeve, the spiral guide rail is used for converting the lifting action of the first lifting rod into the lifting action of the second lifting rod, and the screw pitch of the internal threads is smaller than that of the spiral guide rail, so that the lifting action transmitted from the first lifting rod to the second lifting rod is similar to that of a 'speed reducing mechanism', and the speed of the second lifting rod is slower than that of the first lifting rod;
3) furthermore, the linkage sleeve also comprises a sliding sleeve and an extension rod, the sliding sleeve is sleeved on the inner sleeve 20, the extension rod is limited by the spiral guide rail 23 to move up and down in the vertical guide groove, and the spiral guide rail is a smooth curve, so that when the extension rod carries out lifting movement along with the first lifting rod, the spiral guide rail guides the extension rod to carry out stable and smooth up and down movement, and the second lifting rod is driven to carry out corresponding smooth and steady lifting movement, and the lower safety tongs cannot be suddenly moved;
4) furthermore, in order to increase the applicability of the safety gear, the linkage sleeve is of a detachable structure, linkage sleeves of different models can be obtained through limited experiments, namely, the time that the lower safety gear is slower than the upper safety gear when spiral guide rails with different thread pitches are used is obtained through the limited experiments, the linkage sleeves of different models are divided according to the ratio of the thread pitch of the spiral guide rails to the thread pitch of the internal thread, and the linkage sleeves of different models are marked, so that the linkage sleeves of different models are selected when elevators with different running speeds are used, and the applicability of the elevators is further enhanced;
5) furthermore, in order to ensure the running safety of the elevator and prevent the elevator from generating too large impact on the safety gear when large impact vibration occurs, so as to cause irreparable damage, the application range of the safety gear is enlarged, an outer sleeve is also arranged between a cylinder body of a linkage sleeve and a top plate of an upper frame body, the outer sleeve is sleeved outside the cylinder body, the outer sleeve can only slide along the axial direction of the cylinder body, a pretightening spring is arranged between the top plate of the upper frame body and the cylinder body, when a first lifting rod normally acts, the pretightening spring tightly pushes the cylinder body, an inner sleeve rotates along with the lifting of the first lifting rod, so that a second lifting rod is correspondingly driven to carry out lifting, if the first lifting rod is abnormally carried after being impacted, the pretightening spring is compressed, so that the second lifting rod is synchronously carried along with the lifting of the first lifting rod, so that the elevator can automatically take corresponding braking action according to the specific situation of the lifting rod, the safety of the elevator is further improved;
6) further, be provided with the external screw thread that meshes with the internal thread of endotheca on the lifting rod one, thereby the rotary motion of interior cover is converted into to the carry of lifting rod one, simultaneously in order to adapt to the commonality of this application, make it improve to current safety tongs, make the external screw thread set up to the form of thread bush, then embolia in current lifting rod, thereby need not carry out redesign again to current lifting rod, on the basis of current two safety tongs of arranging side by side, add the linkage cover, with linkage cover complex lifting rod two, embolia lifting rod two with the thread bush again can, further improve the commonality of equipment.
Drawings
Fig. 1 presents a diagrammatic illustration of the structure of an elevator according to the invention;
fig. 2 is a view of the elevator safety gear of the invention in the direction of a;
fig. 3 is a view B-B of the elevator safety gear of fig. 2;
fig. 4 is a schematic view of another structure of elevator safety gear.
Description of the reference symbols
1. A car; 2. a guide shoe; 3. safety tongs; 4. a guide rail; 5. a machine room bottom plate; 6. a governor wheel mounting base; 7. a governor wheel; 8. a speed limiter wire rope; 9. a speed limiter tension wheel; 10. a joint; 11. a linkage rod; 12. lifting a first pull rod; 13. an upper frame body; 14. a lower frame body; 15. a linkage sleeve; 16. lifting a pull rod II; 17. an upper brake wedge assembly; 18. a lower brake wedge assembly; 19. a barrel; 20. an inner sleeve; 21. a lower base plate; 22. an upper top plate; 23. a helical guide rail; 24. a sliding sleeve; 25. an extension bar; 26. a lifting rod connector; 27. a vertical guide groove; 28. connecting the end heads; 29. an internal thread; 30. passing through the aperture; 31. a first bearing; 32. a second bearing; 33. fixing a wedge block; 34. an upper movable wedge block; 35. a first sliding block; 36. a buffer plate; 37. a buffer spring; 38. adjusting the bolt; 39. a first strip-shaped hole; 40. a lower fixed wedge; 41. a lower movable wedge block; 42. a second sliding block; 43. a strip-shaped hole II; 44. an outer sleeve; 45. a limiting guide block; 46. a limiting guide groove; 47. pre-tightening the spring; 48. and a top plate of the upper frame body.
Detailed Description
The present invention is further illustrated by the following examples, which are not intended to be limiting in any way, and any modifications or alterations based on the teachings of the present invention are intended to fall within the scope of the present invention.
As shown in fig. 1-3, the elevator of the present invention includes a car 1, a guide shoe 2, a safety gear 3, a guide rail 4, a governor wheel 7, a governor wire rope 8, a governor tensioning wheel 9, a linkage rod 11 and a first lifting rod 12, the car 1 is guided by the guide shoe 2 to move up and down along the guide rail 4, the safety gear 3 is installed at the bottom of the car 1, the governor wire rope 8 is surrounded between the governor wheel 7 and the governor tensioning wheel 9, one end of the linkage rod 11 is connected to the governor wire rope 8, the other end is connected to the first lifting rod 12, the lower end of the lifting rod 12 is connected to the safety gear 3, the car 1 further includes a driving mechanism such as a wire rope traction mechanism or a cordless motor driving structure, and the like. As shown in fig. 2, the safety gear 3 includes an upper brake wedge assembly 17, a lower brake wedge assembly 18 and a linkage sleeve 15, the linkage sleeve 15 is installed at the upper end of the upper brake wedge assembly 17, the lower brake wedge assembly 18 is installed at the lower end of the upper brake wedge assembly 17, a first lifting rod 12 is slidably connected to the inner side of the linkage sleeve 15 through an external thread, the first lifting rod 12 penetrates through the linkage sleeve 15 and then is connected with the upper brake wedge assembly 17, the side edge of the linkage sleeve 15 is connected with a second lifting rod 16, the second lifting rod 16 is connected with the lower brake wedge assembly 18, the first lifting rod 12 drives the second lifting rod 16 to synchronously move through the linkage sleeve 15, and the lifting speed of the second lifting rod 16 is lower than that of the first lifting rod 12.
As shown in fig. 3, the linkage sleeve 15 includes a cylinder 19, an inner sleeve 20, an upper top plate 22, a lower bottom plate 21, a spiral guide rail 23, a sliding sleeve 24, an extension bar 25 and a lifting bar connector 26, the cylinder 19 is installed at the upper end of the upper brake wedge assembly 17, the inner sleeve 20 is coaxially installed inside the cylinder 19, the upper end and the lower end are fixedly connected with the upper top plate 22 and the lower bottom plate 21 respectively, the upper top plate 22 and the lower bottom plate 21 can rotate relative to the cylinder 19, two ends of the spiral guide rail 23 are fixed on the upper top plate 22 and the lower bottom plate 21 respectively, the spiral guide rail 23 is arranged around the inner sleeve 20, the sliding sleeve 24 is slidably arranged at the outer end of the inner sleeve 20, the left end of the extension bar 25 is fixedly connected to the right end of the sliding sleeve 24, the right end of the extension bar 25 is fixedly connected with the lifting bar connector 26 for connecting with the lifting bar two 16, the cylinder 19 is provided with a vertical guide groove 27 at the right end, the extension bar 25 penetrates out of the vertical guide groove 27, thereby vertical guide slot 27 can guide the extension bar 25 along vertical direction up-and-down motion, extension bar 25 butt is on helical guideway 23, go up roof 22, all be provided with on the lower plate 21 and pass hole 30, the endotheca 20 inboard is provided with internal thread 29, this internal thread 29 meshes with the external screw thread of lifting rod one 12, thereby when lifting rod one 12 lifts the action, can drive endotheca 20 and helical guideway 23 rotatory, extension bar 25 carries out synchronous lifting under helical guideway 23 and vertical guide slot 27's combined action, and then when lifting rod one 12 lifts, lifting rod two 16 also promote.
Preferably, the pitch of the spiral guide rail 23 is greater than the pitch of the internal thread 29, so that the pulling speed of the second pulling rod 16 is lower than that of the first pulling rod 12. Preferably, the spiral guide rail 23 and the internal thread 29 are arranged in a rotating direction such that the spiral guide rail 23 can drive the extension bar 25 to perform the pulling operation when the first pulling rod 12 performs the pulling operation.
Preferably, in order to ensure that the upper top plate 22 and the lower bottom plate 21 rotate smoothly, a first bearing 31 is arranged between the upper top plate 22 and the cylinder 19, and a second bearing 32 is arranged between the lower bottom plate 21 and the cylinder 19.
Preferably, the spiral guide rail 23 may include a round bar, a flat bar, or two parallel round bars, and the extension bar 25 may be provided with a guide sleeve sleeved on the spiral guide rail 23, or the extension bar 25 is located between the two parallel round bars to achieve smooth movement.
Preferably, the spiral guide rail 23 may also be located on the inner sleeve 20 and has a spirally arranged groove structure, and the extension bar 25 is embedded into the spirally arranged groove structure, so that the extension bar 25 can be lifted and lowered correspondingly when the inner sleeve 20 rotates.
Preferably, the upper brake wedge assembly 17 includes an upper frame 13, and the linkage sleeve 15 is mounted on either the inside or outside of the upper frame 13. Preferably, the top plate 48 of the upper frame 13 is further provided with a connection end 28, and the cylinder 19 is detachably connected in the connection end 28, for example, by a screw connection or a bayonet connection.
Further, as shown in fig. 4, the linkage sleeve 15 includes a cylinder 19, an inner sleeve 20, an upper top plate 22, a lower bottom plate 21, a spiral guide rail 23, a sliding sleeve 24, an extension bar 25, a lifting rod connector 26, an outer sleeve 44 and a pre-tightening spring 47, the cylinder 19 is mounted at the upper end of the upper brake wedge assembly 17, the inner sleeve 20 is coaxially disposed inside the cylinder 19, the upper end and the lower end are fixedly connected with the upper top plate 22 and the lower bottom plate 21 respectively, the upper top plate 22 and the lower bottom plate 21 can rotate relative to the cylinder 19, two ends of the spiral guide rail 23 are fixed on the upper top plate 22 and the lower bottom plate 21 respectively, the spiral guide rail 23 is disposed around the inner sleeve 20, the sliding sleeve 24 is slidably disposed at the outer end of the inner sleeve 20, the left end of the extension bar 25 is fixedly connected to the right end of the sliding sleeve 24, the right end of the extension bar 25 is fixedly connected with the lifting rod connector 26 for connecting with the lifting rod two 16, the cylinder 19 is provided with a vertical guide groove 27 at the right end, the extension rod 25 penetrates out of the vertical guide groove 27, the vertical guide groove 27 can guide the extension rod 25 to move up and down along the vertical direction, the extension rod 25 abuts against the spiral guide rail 23, the upper top plate 22 and the lower bottom plate 21 are provided with the through holes 30, the inner side of the inner sleeve 20 is provided with the internal thread 29, the internal thread 29 is meshed with the external thread of the first lifting rod 12, the inner sleeve 20 and the spiral guide rail 23 can be driven to rotate when the first lifting rod 12 is lifted, the extension rod 25 is lifted synchronously under the combined action of the spiral guide rail 23 and the vertical guide groove 27, and then when the first lifting rod 12 is lifted, the second lifting rod 16 is also lifted. The cylinder 19 is slidably sleeved in the outer sleeve 44, a pre-tightening spring 47 is fixedly arranged between the top plate 48 of the upper frame body and the cylinder 19, the upper end of the cylinder 19 is provided with a limiting guide block 45, the outer sleeve 44 is provided with a limiting guide groove 46, and the limiting guide block 45 slides up and down along the limiting guide groove 46. In the initial state, the elastic force of the pre-tightening spring 47 compresses the cylinder 19, so that the cylinder 19 is located at the lower end of the outer sleeve 44, when the first lifting rod is lifted normally, the pre-tightening spring 47 compresses the cylinder 19, so that the inner sleeve 20 can rotate normally, and when the first lifting rod is lifted suddenly under the impact of external force, the lifting force acts on the pre-tightening spring 47 to compress the pre-tightening spring, so that the cylinder 19 is directly driven to move upwards, and the second lifting rod can be matched to be lifted synchronously. Preferably, the interlocking sleeve 15 may be attached to the upper end of the upper frame top plate 48.
Preferably, the external thread on the lifting rod I can be set to be in a threaded sleeve structure, so that the existing lifting rod can be improved, the threaded sleeve structure is sleeved in the smooth lifting rod, and the applicability of the lifting rod is further improved.
Preferably, the upper and lower brake wedge assemblies 17, 18 may be of existing independent instantaneous and/or progressive safety gear construction.
Preferably, as shown in fig. 2, the upper brake wedge assembly 17 includes an upper frame 13, a buffer plate 36, a buffer spring 37, an adjusting bolt 38, an upper fixed wedge 33, a first sliding block 35, and an upper movable wedge 34, wherein the buffer plate 36 is horizontally slidably disposed in the upper frame 13, the adjusting bolt 38 is disposed on a side of the upper frame 13, one end of the buffer plate 36 abuts against a tail end of the adjusting bolt 38, the other end of the buffer plate is fixedly connected with one end of the buffer spring 37, the other end of the buffer spring 37 is connected with the upper fixed wedge 33, the upper fixed wedge 33 can horizontally slide in the upper frame 13, the other end of the upper fixed wedge 33 is slidably disposed with the first sliding block 35, the other end of the first sliding block 35 is slidably connected with the upper movable wedge 34, a horizontally disposed first strip-shaped hole 39 is disposed in the upper movable wedge 34, and the first lifting rod 12 is connected with the upper movable wedge 34 through the first strip-shaped hole 39.
Further, the lower brake wedge assembly 18 includes a lower frame 14, a lower fixed wedge 40, a lower movable wedge 41, and a second sliding block 42, one end of the lower fixed wedge 40 is fixedly disposed inside the lower frame 14, the other end of the lower fixed wedge is movably connected with the second sliding block 42, the other end of the second sliding block 42 is slidably connected with the lower movable wedge 41, a second horizontally disposed strip-shaped hole 43 is disposed in the lower movable wedge 41, and the second lifting rod 16 is connected with the lower movable wedge 41 through the second strip-shaped hole 43.
Further, the upper frame 13 and the lower frame 14 may be integrally formed or separately provided.
Further, a speed limiter wheel 7 is rotatably arranged on a speed limiter wheel mounting seat 6, and the speed limiter mounting seat 6 is arranged on the machine room bottom plate 5; further, the speed limiter steel wire rope 8 is connected with a linkage rod 11 through a joint 10.
Further, the upper frame top plate 48 is provided with the insertion hole 30.
The working process of the elevator of the invention is as follows: when the elevator car runs at an overspeed or falls accidentally, the speed limiter steel wire rope 8 drives the linkage rod 11 to act to drive the first lifting rod 12 to carry out lifting action, the first lifting rod 12 drives the upper movable wedge block 34 to act upwards so as to compress the guide rail 4, when the first lifting rod 12 carries out lifting action, the external thread arranged on the first lifting rod 12 is meshed with the internal thread in the inner sleeve 20 so as to correspondingly drive the lower bottom plate 21 and the upper top plate 22 to carry out rotating action so as to drive the spiral guide rail 23 to carry out rotating action, the spiral guide rail 23 drives the extension rod 25 to carry out corresponding lifting action along the guide rail 23, the lifting rod connector connected with the tail end of the extension rod is connected with a second lifting rod 16, the second lifting rod 16 drives the lower movable wedge block 41 to carry out lifting action, so that the lower movable wedge block 41 and the upper movable wedge block 34 act simultaneously, and simultaneously, the thread pitch of the spiral guide rail 23 is set to be larger than that of the internal thread 29, therefore, the pulling speed of the second lifting rod 16 is slower than that of the first lifting rod 12, so that the lower movable wedge 41 lags behind the upper movable wedge 34 for braking, and the abrasion of the wedges is further reduced. And because the linkage sleeve 15 is a detachable structure, and the linkage sleeve 15 is provided with a plurality of models according to the difference between the pitch of the spiral guide rail 23 and the pitch of the internal thread, when the braking time of the lower movable wedge block is delayed by the upper movable wedge block, the linkage sleeve 15 with the larger pitch ratio between the pitch of the spiral guide rail 23 and the pitch of the internal thread is selected.
According to the elevator safety tongs, the elevator safety tongs comprise two groups of brake wedge block assemblies, the linkage sleeves are arranged on the brake wedge block assemblies and are connected with the first lifting rods and the second lifting rods for driving the two groups of brake wedge block assemblies, the lifting actions of the first lifting rods are smooth and gentle to change for lifting the second lifting rods under the combined action of the inner sleeves with internal threads and the spiral guide rails outside the inner sleeves, the brake of the lower movable wedge blocks can be gentle when the guide rails are braked, the brake impact is reduced, and the equipment loss is reduced while the brake effect of the safety tongs is improved.
Claims (9)
1. An elevator safety gear comprises an upper brake wedge block assembly (17) and a lower brake wedge block assembly (18), wherein the lower brake wedge block assembly (18) is installed at the lower end of the upper brake wedge block assembly (17), the elevator safety gear is characterized by further comprising a linkage sleeve (15), the linkage sleeve (15) is installed at the upper end of the upper brake wedge block assembly (17), the linkage sleeve (15) comprises a cylinder body (19), an inner sleeve (20), a spiral guide rail (23) and an extension rod (25), the inner sleeve (20) is rotatably arranged on the inner side of the cylinder body (19), internal threads (29) are arranged on the inner side of the inner sleeve (20), the spiral guide rail (23) is arranged around the inner sleeve (20) and can rotate along with the rotation of the inner sleeve, one end of the extension rod (25) is sleeved on the inner sleeve (20), the other end of the extension rod is connected with a second lifting rod (16), the middle of the extension rod abuts against the spiral guide rail (23), a first lifting rod (12) is meshed with the internal threads (29) on the inner side of the linkage sleeve (15) through external threads, the lifting rod I (12) penetrates through the linkage sleeve (15) and then is connected with the upper brake wedge block assembly (17), the lifting rod I (12) is connected with the upper movable wedge block (34) through a horizontally arranged strip-shaped hole I (39) arranged in an upper movable wedge block (34) of the upper brake wedge block assembly (17), the lifting rod II (16) is connected with the lower brake wedge block assembly (18), the lifting rod II (16) is connected with the lower movable wedge block (41) through a horizontally arranged strip-shaped hole II (43) arranged in a lower movable wedge block (41) of the lower brake wedge block assembly (18), the lifting rod I (12) drives the lifting rod II (16) to synchronously act through the linkage sleeve (15), and the screw pitch of the spiral guide rail (23) is larger than that of the internal thread (29), so that the lifting speed of the lifting rod II (16) is lower than that of the lifting rod I (12).
2. An elevator safety gear according to claim 1, characterized in that: the linkage sleeve (15) further comprises an upper top plate (22), a lower bottom plate (21), a sliding sleeve (24) and a lifting rod connector (26), the inner sleeve (20) is coaxially arranged inside the cylinder body (19), the upper end and the lower end of the inner sleeve (20) are fixedly connected with the upper top plate (22) and the lower bottom plate (21) respectively, the upper top plate (22) and the lower bottom plate (21) can rotate relative to the cylinder body (19), two ends of a spiral guide rail (23) are fixed on the upper top plate (22) and the lower bottom plate (21) respectively, the sliding sleeve (24) is arranged at the outer end of the inner sleeve (20) in a sliding mode, the left end of an extension rod (25) is fixedly connected to the right end of the sliding sleeve (24), the right end of the extension rod (25) is fixedly connected with the lifting rod connector (26) used for being connected with a second lifting rod (16), the right end of the cylinder body (19) is provided with a vertical guide groove (27), and the extension rod (25) penetrates out of the vertical guide groove (27), therefore, the vertical guide groove (27) can guide the extension rod (25) to move up and down along the vertical direction, and the upper top plate (22) and the lower bottom plate (21) are provided with through holes (30).
3. An elevator safety gear according to claim 1, characterized in that: the linkage sleeve (15) further comprises an upper top plate (22), a lower bottom plate (21), a sliding sleeve (24), an outer sleeve (44) and a pre-tightening spring (47), the inner sleeve (20) is coaxially arranged inside the cylinder body (19), the upper end and the lower end of the inner sleeve (20) are fixedly connected with the upper top plate (22) and the lower bottom plate (21) respectively, the upper top plate (22) and the lower bottom plate (21) can rotate relative to the cylinder body (19), two ends of a spiral guide rail (23) are fixed on the upper top plate (22) and the lower bottom plate (21) respectively, the sliding sleeve (24) is arranged at the outer end of the inner sleeve (20) in a sliding mode, the left end of the extension rod (25) is fixedly connected with the right end of the sliding sleeve (24), the right end of the extension rod (25) is fixedly connected with a lifting rod connector (26) used for being connected with the lifting rod II (16), the vertical guide groove (27) is arranged at the right end of the cylinder body (19), and the extension rod (25) penetrates out of the vertical guide groove (27), thereby vertical guide slot (27) can guide extension bar (25) along vertical direction up-and-down motion, extension bar (25) butt is on helical guideway (23), go up roof (22), all be provided with on lower plate (21) and pass hole (30), barrel (19) sliding sleeve locates in outer sleeve (44), and fixed pretension spring (47) that is provided with between last framework roof (48) and barrel (19), barrel (19) upper end is provided with spacing guide block (45), outer sleeve (44) are provided with spacing guide slot (46), spacing guide block (45) slide from top to bottom along spacing guide slot (46).
4. An elevator safety gear according to claim 2 or 3, characterized in that: the upper brake wedge assembly (17) comprises an upper frame body (13), and the linkage sleeve (15) is installed on the inner side or the outer side of the upper frame body (13).
5. An elevator safety gear according to claim 2 or 3, characterized in that: a connecting end (28) is further arranged on an upper frame top plate (48) of the upper frame (13), and the cylinder (19) is detachably connected into the connecting end (28).
6. An elevator safety gear according to claim 2 or 3, characterized in that: a first bearing (31) is arranged between the upper top plate (22) and the cylinder body (19), and a second bearing (32) is arranged between the lower bottom plate (21) and the cylinder body (19).
7. An elevator safety gear according to claim 1, characterized in that: the spiral guide rail (23) is a structure consisting of a round rod, a flat strip or two parallel round rods.
8. An elevator safety gear according to claim 1, characterized in that: the upper brake wedge assembly (17) and the lower brake wedge assembly (18) are of independent instantaneous and/or progressive safety gear structure.
9. An elevator safety gear according to any one of claims 2-3 and 7-8, characterized in that: the upper braking wedge block assembly (17) comprises an upper frame body (13), a buffer plate (36), a buffer spring (37), an adjusting bolt (38), an upper fixed wedge block (33), a first sliding block (35) and an upper movable wedge block (34), wherein the buffer plate (36) is horizontally arranged in the upper frame body (13) in a sliding manner, the adjusting bolt (38) is arranged on the side edge of the upper frame body (13), one end of the buffer plate (36) is abutted against the tail end of the adjusting bolt (38), the other end of the buffer plate is fixedly connected with one end of the buffer spring (37), the other end of the buffer spring (37) is connected with the upper fixed wedge block (33), the upper fixed wedge block (33) can horizontally slide in the upper frame body (13), the other end of the sliding block (33) is provided with a first sliding block (35), the other end of the first sliding block (35) is slidably connected with the upper movable wedge block (34), and a first horizontally-arranged strip-shaped hole (39) is arranged in the upper movable wedge block (34), the lifting rod I (12) is connected with the upper movable wedge block (34) through a strip-shaped hole I (39); lower braking voussoir subassembly (18) are including framework (14) down, lower fixed voussoir (40), lower movable voussoir (41), two sliding blocks (42), lower fixed voussoir (40) one end is fixed to be set up in framework (14) are inboard down, one end swing joint has two sliding blocks (42) in addition, two sliding block (42) other one end sliding connection lower movable voussoir (41), be provided with two (43) of bar hole of horizontal arrangement in lower movable voussoir (41), it connects lower movable voussoir (41) through two (43) of bar hole to carry pull rod two (16).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011144181.7A CN112279034B (en) | 2020-10-23 | 2020-10-23 | Elevator safety tongs |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011144181.7A CN112279034B (en) | 2020-10-23 | 2020-10-23 | Elevator safety tongs |
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| CN112279034A CN112279034A (en) | 2021-01-29 |
| CN112279034B true CN112279034B (en) | 2021-12-17 |
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| CN112279034A (en) | 2021-01-29 |
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