CN212712266U - Lift safety tongs downward lifting mechanism - Google Patents
Lift safety tongs downward lifting mechanism Download PDFInfo
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- CN212712266U CN212712266U CN202021556557.0U CN202021556557U CN212712266U CN 212712266 U CN212712266 U CN 212712266U CN 202021556557 U CN202021556557 U CN 202021556557U CN 212712266 U CN212712266 U CN 212712266U
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Abstract
The utility model provides a lower lifting mechanism of elevator safety tongs, which comprises safety tongs, a safety tongs mounting seat, a lifting device and a trigger device used for triggering the safety tongs and triggering an electrical switch fixed on a lower beam of a lift car; the safety gear mounting seats are arranged at two ends of the lower beam of the lift car, and the safety gears are arranged on the safety gear mounting seats; the lifting device is positioned on the side part of the car upright post and is connected with the steel wire rope; the trigger device is respectively connected with the lifting device and the safety gear, and the trigger device can elastically rotate to realize that the lifting device drives the trigger device to rotate so as to trigger the safety gear to act; the trigger device is provided with a rotary beating plate, and the rotary beating plate triggers the electric switch to act when the trigger device rotates, so that the elevator traction main machine is stopped. The utility model discloses simple to operate can adjust the pretightning force of carrying moreover and drawing to improve pull rod link gear's life and reduce use cost. The utility model discloses can trigger the safety tongs action and drive electrical switch at the underbeam, reach duplicate protection's effect.
Description
Technical Field
The utility model relates to an elevator technical field, more specifically say, relate to an elevator safety tongs draws mechanism down.
Background
The elevator usually uses the safety gear overspeed governor link gear, and they use always supporting, when the speed of car surpassed a definite value of the rated speed of the car of elevator, then can trigger the action of safety gear through the overspeed governor, made the safety gear card in car guide rail to make the car stop motion, prevent the accident, guarantee the car and take advantage of personnel's safety.
The conventional lifting mechanism is arranged above the car roof in a convenient resetting manner, and the safety tongs below the car are lifted by the pull rod linkage mechanism of the upper beam (positioned on the upper side of the car roof), but the lifting structure is not suitable for use due to reasons such as insufficient height of the top layer, so that a safety space with sufficient height of the top layer is required to be used in a downward lifting manner, or misoperation or failure in triggering of the lifting mechanism due to inaccurate lifting transmission caused by overlong transmission rods can occur.
In addition, the existing pull rod linkage mechanism has the defect of inconvenient installation and part replacement, and in the long-term use process of the pull rod linkage mechanism, parts with large abrasion are difficult to replace and install, and only the whole pull rod linkage mechanism can be replaced, so that the service life of the pull rod linkage mechanism is shortened, and the use cost is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects and shortcomings in the prior art and provide a lower lifting mechanism of elevator safety tongs; the elevator safety gear downward pulling mechanism is convenient to install, and the pulling pre-tightening force can be adjusted, so that the service life of the pull rod linkage mechanism is prolonged, and the use cost is reduced; in addition, when the speed limiter detects that the elevator is overspeed, the lower lifting mechanism of the elevator safety gear can trigger the safety gear to act on the lower beam in a short distance, drive the electrical switch, electrically brake and stop the elevator traction main machine, and achieve the effect of double protection.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the utility model provides an elevator safety tongs is lifting mechanism down which characterized in that: the safety gear lifting device comprises a safety gear, a safety gear mounting seat, a lifting device and a triggering device, wherein the triggering device is used for triggering the safety gear to act and triggering an electric switch fixed on a lower beam of a lift car to act; the safety gear mounting seats are arranged at two ends of the lower beam of the lift car, and the safety gears are arranged on the safety gear mounting seats; the lifting device is positioned on the side part of the car upright post and is connected with the steel wire rope; the trigger device is respectively connected with the lifting device and the safety tongs, and the trigger device can elastically rotate to realize that the lifting device drives the trigger device to rotate so as to trigger the safety tongs to act; the trigger device is provided with a rotary beating plate, and the rotary beating plate triggers an electric switch to act when the trigger device rotates, so that the elevator traction main machine is stopped;
a fixing plate is arranged on the side part of the safety gear mounting seat and is positioned on the side of the lower beam of the lift car; the trigger device also comprises a torsion bar, a torsion spring, a first pulling frame and a second pulling frame; the torsion spring is arranged on the torsion bar and connected with the fixing plate; the torsion bar penetrates through the fixed plate, and two ends of the torsion bar extend out of the fixed plate and are respectively connected with the first pulling frame and the second pulling frame; the rotary beating plate penetrates through and is fixed on the torsion bar;
the fixed plate is provided with a plurality of torsional spring fixed holes for adjusting the lifting pretightening force; one end of the torsion spring is fixed on the torsion bar, and the other end of the torsion spring is adjustably fixed in the torsion spring fixing hole, so that the lifting pretightening force is adjusted.
In the scheme, after the speed limiter detects overspeed, the speed limiter blocks a steel wire rope, the car continues to move downwards and is transmitted to the lifting device through the steel wire rope, the triggering device can be driven by the lifting device to rotate so as to trigger the safety tongs to act, so that the car stops at the position where the safety tongs are clamped on the guide rail, meanwhile, the triggering device is provided with a rotary beating plate, the rotary beating plate triggers an electric switch to act when the triggering device rotates, and braking of the elevator traction main machine is realized, so that the mechanical and electric double-insurance safety braking car is realized.
In addition, the fixing plate for installing the torsion spring and the torsion bar is arranged on the side part of the safety gear installation seat and is positioned on the side of the car underbeam, so that the installation process of the torsion spring and the torsion bar is not influenced by the positions of the car underbeam and the safety gear installation seat, the installation and the replacement of the torsion spring and the torsion bar are convenient, the problem that only the whole pull rod linkage mechanism can be replaced in the prior art can be solved, and the use cost is reduced. And simultaneously, the utility model discloses the angle of torsional spring not only can be set for to the effect of torsional spring fixed orifices to make the torsion bar have certain pretightning force when normal assembled state, can play the effect of adjusting the pretensioning force of carrying, when torsional spring wearing and tearing or elasticity diminish, can be with the fixed different torsional spring fixed orifices of the other end of torsional spring in order to guarantee current pretightning force, thereby improved pull rod link gear's life.
The fixed plate is detachably connected with the safety gear mounting seat. The design can facilitate the installation and replacement of parts such as a torsion spring, a torsion bar and the like, the parts such as the torsion spring, the torsion bar and the like can be integrated after being installed on the fixing plate and then installed on the safety gear installation seat
The torsion bar mounting holes are uniformly formed in the outer circumference of the torsion bar mounting hole.
The lifting device comprises a lifting rod and a rope head clamp fixing plate for fixing a steel wire rope; the rope head clamp fixing plate is connected with the steel wire rope; one end of the lifting rod is connected with the rope end clamp fixing plate, and the other end of the lifting rod is connected with the trigger device, so that the steel wire rope pulls the lifting rod to drive the trigger device to rotate.
The lifting device of the utility model also comprises a lifting rod limiting bracket used for limiting the moving range of the lifting rod; the lifting rod penetrates through the lifting rod limiting support, and the lifting rod limiting support is connected with the car stand column. The width of the lifting rod limiting support is larger than that of the lifting rod, the lifting rod limiting support is used for limiting the moving range of the lifting rod to be not too large, and the lifting rod limiting support can possibly collide with other parts of a hoistway or an elevator car when the moving range is too large.
The safety tongs comprise a movable wedge block, a tong seat, a sliding groove, a fixed wedge block and an elastic piece; the clamp seat is connected with the safety clamp mounting seat; the elastic piece and the sliding groove are both arranged on the caliper seat, and the fixed wedge block is connected with the elastic piece; the movable wedge blocks are connected in the sliding grooves in a sliding mode, and a movable space of the car guide rail is arranged between the movable wedge blocks and the fixed wedge blocks.
The pulling frame I and the pulling frame II are respectively connected with the lifting device and a movable wedge block of the safety tongs.
The safety gear mounting seat is provided with observation holes for observing the distance between the movable wedge block and the fixed wedge block and the car guide rail. The observation hole is used for observing the distance between the movable wedge block and the fixed wedge block and the car guide rail when the gap of the safety gear is assembled and adjusted.
The rope head clamp fixing plate is provided with a first hole position for fixing one end of the steel wire rope and a second hole position for fixing the other end of the steel wire rope; the first hole is positioned above the second hole; two ends of the steel wire rope are connected through a rope head clamp fixing plate to form closed-loop connection. One end of the steel wire rope is used for fixedly connecting the speed limiter of the machine room, and the other end of the steel wire rope is used for connecting the speed limiter tensioning device below the lift car.
The utility model discloses lift mechanism's under elevator safety tongs working process is like:
in a normal state, the movable wedge block of the safety gear is positioned below the vertical movable range under the action of gravity and the pre-tightening force of the torsion bar, namely the gravity of the movable wedge block and the force reserved for the torsion bar during assembly enable the movable wedge block of the safety gear to be in an open state (the gap between the movable wedge block and the fixed wedge block is larger than the thickness of the car guide rail, and the safety gear is in a normal use state).
After the overspeed governor detects that the car is overspeed, the overspeed governor blocks the steel wire rope passing through the overspeed governor, and the car continues to descend, and then transmits the steel wire rope blocking the overspeed governor to the rope head clamp fixing plate connected with the lifting rod, and then the lifting rod is lifted. When the pulling force is greater than the pre-tightening force of the torsion bar and the gravity of the movable wedge block, the first pulling frame and the second pulling frame trigger the safety tongs to act, at the moment, the movable wedge block of the safety tongs will lift upwards, the gap between the movable wedge block and the fixed wedge block will gradually become smaller, and the safety tongs are clamped on the car guide rail, so that the car stops at the position where the safety tongs are clamped on the guide rail. Meanwhile, the rotary beating plate fixed on the torsion bar triggers an electric switch fixed on a lower beam of the lift car to act, so that a traction main machine of the elevator is electrically braked, and the lift car is safely braked by mechanical and electrical double insurance.
Compared with the prior art, the utility model has the advantages of as follows and beneficial effect:
1. the utility model discloses elevator safety tongs is carried under and is drawn mechanism when the overspeed governor detects the elevator and hypervelocity, can the low coverage liftoff trigger the safety tongs action at the underbeam to drive electrical switch realizes that electrical braking stops the elevator and tows the host computer, reaches duplicate protection's effect.
2. The utility model discloses lift mechanism simple to operate under elevator safety tongs, the pretightning force of pulling is carried in adjustable moreover to improve pull rod link gear's life and reduce use cost.
Drawings
FIG. 1 is a first structural schematic diagram of a lifting mechanism of an elevator safety gear;
FIG. 2 is a second schematic structural view of a lower lifting mechanism of the elevator safety gear of the present invention;
fig. 3 is a first schematic diagram of a safety gear mounting seat in a lifting mechanism of an elevator safety gear;
fig. 4 is a second schematic diagram of a safety gear mounting seat in the elevator safety gear lower lifting mechanism of the invention;
wherein, 1 is a safety gear, 1.1 is a movable wedge block, 1.2 is a gear seat, 1.3 is a sliding groove, 1.4 is an elastic piece, 1.5 is a fixed wedge block, 2 is a safety gear mounting seat, 3 is a car underbeam, 4 is an electrical switch, 5 is a car upright post, 6 is a rotary striking plate, 7 is a lifting rod, 8 is a rope end clamp fixing plate, 9 is a lifting rod limiting support, 10 is a fixing plate, 10.1 is a torsion spring fixing hole, 11 is a torsion bar, 12 is a torsion spring, 13 is a first pulling frame, 14 is a second pulling frame, 15 is an observation hole, and 16 is a mounting hole.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Examples
As shown in fig. 1 to 4, the elevator safety gear downward pulling mechanism of the present invention comprises a safety gear 1, a safety gear mounting seat 2, a pulling device and a triggering device for triggering the safety gear 1 to move and triggering an electrical switch 4 fixed on a car underbeam 3 to move, wherein the safety gear mounting seat 2 is mounted at two ends of the car underbeam 3, the safety gear 1 is arranged on the safety gear mounting seat 2, and the pulling device is located at a side portion of a car column 5 and connected with a steel wire rope; the trigger device is respectively connected with the lifting device and the safety gear 1, and the trigger device can elastically rotate to realize that the lifting device drives the trigger device to rotate so as to trigger the safety gear 1 to act; the trigger device is provided with a rotary beating plate 6, and the rotary beating plate 6 triggers the electric switch 4 to act when the trigger device rotates, so that the elevator traction main machine is stopped.
Specifically, the lifting device comprises a lifting rod 7 and a rope end clamp fixing plate 8 used for fixing the steel wire rope, the rope end clamp fixing plate 8 is connected with the steel wire rope, one end of the lifting rod 7 is connected with the rope end clamp fixing plate 8, the other end of the lifting rod is connected with the trigger device, and the steel wire rope pulls the lifting rod 7 to drive the trigger device to rotate. The lifting device further comprises a lifting rod limiting support 9 used for limiting the range of motion of the lifting rod 7, the lifting rod 7 penetrates through the lifting rod limiting support 9, the lifting rod limiting support 9 is connected with the car upright post 5, and the width of the lifting rod limiting support 9 is larger than that of the lifting rod 7. The function of the lifting rod limiting bracket 9 is to limit the movement range of the lifting rod 7 not to be overlarge, and the lifting rod may collide with other parts of a hoistway or an elevator car when the movement range is overlarge.
The utility model discloses a lateral part of safety tongs mount pad 2 is provided with fixed plate 10, and fixed plate 10 is located the side of car underbeam 3. The trigger device further comprises a torsion bar 11, a torsion spring 12, a first pulling frame 13 and a second pulling frame 14, wherein the torsion spring 12 is arranged on the torsion bar 11 and connected with the fixing plate 10, the fixing plate 10 is provided with a mounting hole 16 of the torsion bar 11, the torsion bar 11 penetrates through the fixing plate 10 through the mounting hole 16, two ends of the torsion bar 11 extend out of the fixing plate 10 to be respectively connected with the first pulling frame 13 and the second pulling frame 14, and the rotary beating plate 6 penetrates through and is fixed on the torsion bar 11. This fixed plate 10 passes through the bolt and can dismantle with safety tongs mount pad 2 and be connected, and the installation and the change of torsional spring 12 and torsion bar 11 of being convenient for can solve among the prior art can only whole pull rod link gear carry out the problem of replacement to reduce use cost.
Carry the pretightning force in order can set for the angle of torsional spring 12 and adjust, the utility model discloses a fixed plate 10 sets up a plurality of and is used for adjusting to carry the torsional spring fixed orifices 10.1 of carrying the pretightning force, and on 12's of torsional spring one end was fixed in torsion bar 11, the other end was fixed in torsional spring fixed orifices 10.1. A plurality of torsion spring fixing holes 10.1 are uniformly formed along the outer circumference of the torsion bar 11 mounting hole 16. The utility model discloses torsional spring fixed orifices 10.1's effect not only can set for the angle of torsional spring 12 to make torsion bar 11 have certain pretightning force when normal assembled state, can play the effect of adjusting the pulling pretensioning force moreover, when torsional spring 12 wearing and tearing or elasticity become small, can be with torsional spring fixed orifices 10.1 of the fixed difference of the other end of torsional spring 12 in order to guarantee current pretightning force, thereby improved pull rod link gear's life.
The utility model discloses a safety tongs 1 is prior art's product, can purchase on the market, it is including activity wedge 1.1, pincers seat 1.2, spout 1.3, fixed wedge 1.5 and elastic component 1.4, wherein, pincers seat 1.2 is connected with safety tongs mount pad 2, elastic component 1.4 and spout 1.3 all set up on pincers seat 1.2, fixed wedge 1.5 is connected with elastic component 1.4, activity wedge 1.1 is sliding connection in spout 1.3, be car guide's free space between activity wedge 1.1 and the fixed wedge 1.5. And the first pulling frame 13 and the second pulling frame 14 are respectively connected with the lifting device and the movable wedge block 1.1 of the safety gear 1.
The utility model discloses a safety tongs mount pad 2 offers and is used for observing the observation hole 15 of distance between activity wedge 1.1 and fixed wedge 1.5 and the car guide rail, and the effect of this observation hole 15 is used for observing the distance of activity wedge 1.1 and fixed wedge 1.5 and car guide rail when assembling the clearance of adjustment safety tongs 1.
The utility model discloses a wire rope is including the wire rope one that is used for the speed limiter of fixed connection computer lab and the wire rope two that is used for connecting car below overspeed governor tight device that rises, and rope clamp fixed plate 8 sets up the hole site one of fixed wire rope one and the hole site two of fixed wire rope two, and hole site one is located hole site two tops, and wire rope one and wire rope two pass through rope clamp fixed plate 8 and connect and form the closed loop and connect.
The utility model discloses lift mechanism's under elevator safety tongs working process is like:
in a normal state, under the action of gravity and the pre-tightening force of the torsion bar 11, the movable wedge 1.1 of the safety gear 1 is positioned below the vertical movable range, namely, the gravity of the movable wedge 1.1 and the force reserved for the torsion bar 11 during assembly enable the movable wedge 1.1 of the safety gear 1 to be in an open state (the gap between the movable wedge 1.1 and the fixed wedge 1.5 is larger than the thickness of the car guide rail, and the safety gear is in a normal use state).
After the speed limiter detects that the car is overspeed, the speed limiter blocks the steel wire rope, the steel wire rope is transmitted to a rope head clamp fixing plate 8 connected with the lifting rod 7 through the steel wire rope, and then the lifting rod 7 is lifted. When the pulling force is greater than the pre-tightening force of the torsion bar 11 and the gravity of the movable wedge 1.1, the first pulling frame 13 and the second pulling frame 14 trigger the safety gear 1 to act, at this time, the movable wedge 1.1 of the safety gear 1 will be lifted upwards, the gap between the movable wedge 1.1 and the fixed wedge 1.5 will gradually decrease, and then the safety gear 1 is clamped on the car guide rail, so that the car stops at the position where the safety gear 1 is clamped on the guide rail. Meanwhile, the rotating beating plate 6 fixed on the torsion bar 11 triggers the electric switch 4 fixed on the lower beam 3 of the elevator car to act, so that the traction main machine of the elevator is electrically braked, and the elevator car is safely stopped by mechanical and electric double insurance.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.
Claims (9)
1. The utility model provides an elevator safety tongs is lifting mechanism down which characterized in that: the safety gear lifting device comprises a safety gear, a safety gear mounting seat, a lifting device and a triggering device, wherein the triggering device is used for triggering the safety gear to act and triggering an electric switch fixed on a lower beam of a lift car to act; the safety gear mounting seats are arranged at two ends of the lower beam of the lift car, and the safety gears are arranged on the safety gear mounting seats; the lifting device is positioned on the side part of the car upright post and is connected with the steel wire rope; the trigger device is respectively connected with the lifting device and the safety tongs, and the trigger device can elastically rotate to realize that the lifting device drives the trigger device to rotate so as to trigger the safety tongs to act; the trigger device is provided with a rotary beating plate, and the rotary beating plate triggers an electric switch to act when the trigger device rotates, so that the elevator traction main machine is stopped;
a fixing plate is arranged on the side part of the safety gear mounting seat and is positioned on the side of the lower beam of the lift car; the trigger device also comprises a torsion bar, a torsion spring, a first pulling frame and a second pulling frame; the torsion spring is arranged on the torsion bar and connected with the fixing plate; the torsion bar penetrates through the fixed plate, and two ends of the torsion bar extend out of the fixed plate and are respectively connected with the first pulling frame and the second pulling frame; the rotary beating plate penetrates through and is fixed on the torsion bar;
the fixed plate is provided with a plurality of torsional spring fixed holes for adjusting the lifting pretightening force; one end of the torsion spring is fixed on the torsion bar, and the other end of the torsion spring is adjustably fixed in the torsion spring fixing hole, so that the lifting pretightening force is adjusted.
2. The elevator safety gear lower pulling mechanism according to claim 1, characterized in that: the fixed plate is detachably connected with the safety gear mounting seat.
3. The elevator safety gear lower pulling mechanism according to claim 1, characterized in that: the torsion bar mounting holes are uniformly formed in the outer circumference of the torsion bar mounting hole.
4. The elevator safety gear lower pulling mechanism according to claim 1, characterized in that: the lifting device comprises a lifting rod and a rope head clamp fixing plate for fixing a steel wire rope; the rope head clamp fixing plate is connected with the steel wire rope; one end of the lifting rod is connected with the rope end clamp fixing plate, and the other end of the lifting rod is connected with the trigger device, so that the steel wire rope pulls the lifting rod to drive the trigger device to rotate.
5. The elevator safety gear lower pulling mechanism according to claim 4, characterized in that: the lifting device also comprises a lifting rod limiting bracket for limiting the moving range of the lifting rod; the lifting rod penetrates through the lifting rod limiting support, and the lifting rod limiting support is connected with the car stand column.
6. The elevator safety gear lower pulling mechanism according to claim 1, characterized in that: the safety tongs comprise a movable wedge block, a tong seat, a sliding groove, a fixed wedge block and an elastic piece; the clamp seat is connected with the safety clamp mounting seat; the elastic piece and the sliding groove are both arranged on the caliper seat, and the fixed wedge block is connected with the elastic piece; the movable wedge blocks are connected in the sliding grooves in a sliding mode, and an installation space of the car guide rail is arranged between the movable wedge blocks and the fixed wedge blocks.
7. The elevator safety gear lower pulling mechanism according to claim 6, characterized in that: the pulling frame I and the pulling frame II are respectively connected with the lifting device and a movable wedge block of the safety tongs.
8. The elevator safety gear lower pulling mechanism according to claim 6, characterized in that: the safety gear mounting seat is provided with observation holes for observing the distance between the movable wedge block and the fixed wedge block and the car guide rail.
9. The elevator safety gear lower pulling mechanism according to claim 4, characterized in that: the rope head clamp fixing plate is provided with a first hole position for fixing one end of the steel wire rope and a second hole position for fixing the other end of the steel wire rope; the first hole is positioned above the second hole; two ends of the steel wire rope are connected through a rope head clamp fixing plate to form closed-loop connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021556557.0U CN212712266U (en) | 2020-07-30 | 2020-07-30 | Lift safety tongs downward lifting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021556557.0U CN212712266U (en) | 2020-07-30 | 2020-07-30 | Lift safety tongs downward lifting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212712266U true CN212712266U (en) | 2021-03-16 |
Family
ID=74911723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021556557.0U Active CN212712266U (en) | 2020-07-30 | 2020-07-30 | Lift safety tongs downward lifting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212712266U (en) |
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2020
- 2020-07-30 CN CN202021556557.0U patent/CN212712266U/en active Active
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