CN111776914A - Bent lever type failure-proof elevator safety tongs and elevator - Google Patents

Bent lever type failure-proof elevator safety tongs and elevator Download PDF

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Publication number
CN111776914A
CN111776914A CN202010713708.7A CN202010713708A CN111776914A CN 111776914 A CN111776914 A CN 111776914A CN 202010713708 A CN202010713708 A CN 202010713708A CN 111776914 A CN111776914 A CN 111776914A
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China
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main
vice
clamp body
auxiliary
voussoir
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CN202010713708.7A
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CN111776914B (en
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王鸿云
毕峰瑞
张莉
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Taizhou University
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Taizhou University
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Publication of CN111776914A publication Critical patent/CN111776914A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66BELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/16Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
    • B66B5/18Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
    • B66B5/22Braking 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)

Abstract

The invention discloses a bent lever type failure-prevention elevator safety tongs, wherein a main wedge block is internally provided with an accommodating groove, the opening of the accommodating groove faces a guide rail, the accommodating groove is internally provided with a roller, the main wedge block is also provided with a first guide hole which enables the accommodating groove to be communicated with an auxiliary wedge block corresponding to the vertical direction, the accommodating groove is also internally provided with a guide rod driven by the roller to rotate, the upper part of the guide rod is positioned in the first guide hole, the top of the guide rod is provided with a rotating guide surface, the bottom of the auxiliary wedge block corresponding to the main wedge block is provided with a second guide hole, the second guide hole is internally provided with the top of a push rod, the bottom of the push rod is contacted with the rotating guide surface of the guide rod. An elevator adopts above-mentioned bent lever formula to prevent losing effect elevator safety tongs. The invention has the advantages that: when the main clamp body fails, the auxiliary clamp body exerts a braking effect, and the safety coefficient is improved. After the elevator adopts above-mentioned structure, for ordinary elevator dual guarantee has been had occasionally in the inefficacy, ensure car safety.

Description

Bent lever type failure-proof elevator safety tongs and elevator
Technical Field
The invention relates to a bent lever type failure-prevention elevator safety tongs and an elevator.
Background
The elevator is the transportation equipment that people are commonly used, and high-rise building all uses car elevator especially, and current car elevator all is equipped with safety tongs, but a guide rail generally corresponds and sets up a safety tongs, and when the elevator dropped down suddenly, the safety tongs can be drawn close each other and press from both sides tight guide rail, plays emergency braking's effect, nevertheless because only a safety tongs, in case can produce very big threat to the life of the person of taking in the elevator in failure.
Disclosure of Invention
The invention aims to provide a bent lever type failure-prevention elevator safety tongs and an elevator, and can effectively solve the problem that the existing elevator has only one pair of safety tongs and is insufficient in safety coefficient.
In order to solve the technical problems, the invention is realized by the following technical scheme: the bent rod type failure-prevention elevator safety tongs comprise a lifting rod, a main tong body and an auxiliary tong body, wherein the auxiliary tong body is arranged above the main tong body, two main wedge blocks which move upwards along the vertical direction under the action of the lifting rod and mutually approach to clamp a guide rail are arranged in the main tong body, each main wedge block is connected with one lifting rod, and two auxiliary wedge blocks which move upwards along the vertical direction and mutually approach to clamp the guide rail are arranged in the auxiliary tong body;
the utility model discloses a wedge structure, including main voussoir, guide pin, guide rod, main voussoir, the holding tank has been opened in the main voussoir, the holding tank opening is towards the guide rail, be equipped with the gyro wheel in the holding tank, main voussoir has still opened the communicating first guiding hole of vice voussoir that makes the holding tank correspond with vertical direction, still be equipped with the rotatory guide arm of by the gyro wheel drive in the holding tank, the upper portion of guide arm is located first guiding hole, the top of guide arm is equipped with rotatory spigot surface, corresponds with main voussoir the bottom of vice voussoir is opened there is the second guiding hole, be equipped with the top of ejector pin in the second guiding hole, the bottom of ejector.
Preferably, the main clamp body and the auxiliary clamp body are integrally arranged; or the main clamp body and the auxiliary clamp body are fixedly connected through bolts. The integrally arranged main clamp body and the auxiliary clamp body have good rigidity and connection stability, and the safety is higher; the split main clamp body and the split auxiliary clamp body are suitable for improving the existing equipment, the maintenance cost can be reduced, and the main clamp body or the auxiliary clamp body with a fault can be independently replaced.
Preferably, the internal main cavity room that is equipped with of main tong, the inside wall of main cavity room is close to the main cavity middle part from supreme down gradually and forms main spigot surface, be equipped with two in the main cavity room main voussoir, two leave the clearance that lets the guide rail pass through between the main voussoir, two main voussoir all is equipped with the main wedge inclined plane with main spigot surface looks adaptation. When the main wedge block moves under the action of upward force, the main guide surface is contacted with the inclined surface of the main wedge block, and the two main wedge blocks are extruded towards the middle to be close to each other and tightly hold the guide rail for braking.
Preferably, the surface of the main wedge opposite to the guide rail is a plane. The plane is easy to process, is beneficial to reducing the production cost and is convenient to install.
Preferably, the auxiliary clamp body is internally provided with an auxiliary cavity, the inner side wall of the auxiliary cavity is gradually close to the middle part of the auxiliary cavity from bottom to top to form an auxiliary guide surface, two auxiliary wedge blocks are arranged in the auxiliary cavity, a gap for the guide rail to pass through is also reserved between the two auxiliary wedge blocks, and the two auxiliary wedge blocks are both provided with auxiliary wedge inclined surfaces matched with the auxiliary guide surfaces. When the auxiliary wedge block moves upwards under the action of the main wedge block, the auxiliary guide surface contacts with the inclined surface of the auxiliary wedge block to extrude the two auxiliary wedge blocks towards the middle, so that the two auxiliary wedge blocks are close to each other to hold the guide rail tightly for braking.
Preferably, the surface of the auxiliary wedge block opposite to the guide rail is a plane.
Preferably, the lifting rod is fixedly connected with the bottom of the corresponding main wedge block. The lifting rod generates upward thrust to push the main wedge blocks to close.
Preferably, the idler wheel comprises a wheel shaft, a rubber wheel and a worm wheel, the wheel shaft is rotatably connected to two opposite side walls of the main chamber, the worm wheel is sleeved on the wheel shaft, the rubber wheel is sleeved on the wheel shaft at two ends of the worm wheel respectively, the worm is arranged at the lower part of the guide rod, when the brake fails, the rubber wheel and the guide rail are in rolling friction, the worm wheel is protected from being damaged, and meanwhile, enough friction force is provided for driving the worm wheel to rotate.
Preferably, the side surface of the main chamber is open, and a baffle plate for closing the opening is arranged on the side surface of the main clamp body. The side opening is convenient for the installation of the main wedge block and the guide rod, and after the installation is finished, the opening is timely sealed through the baffle, so that the main wedge block is protected from being influenced in movement.
An elevator adopts above-mentioned bent lever formula to prevent losing effect elevator safety tongs.
Compared with the prior art, the invention has the advantages that: through setting up vice pincers body, when main pincers body became invalid, the relative slip took place with the guide rail contact for the gyro wheel, and the rotation of gyro wheel drives the guide arm and rotates, and the rotation of guide arm can make the ejector pin with the guide arm contact at vertical direction upward movement to with vice wedge piece jack-up that makes progress, thereby vice wedge piece upward movement in-process can draw close each other and press from both sides tight guide rail, realizes the braking, just so can be when main pincers body became invalid vice pincers body performance braking effect, improvement factor of safety. After the elevator adopts above-mentioned structure, for ordinary elevator dual guarantee has been had occasionally in the inefficacy, ensure car safety.
Drawings
FIG. 1 is a structural view of a bent lever type failure-preventing elevator safety gear of the present invention;
FIG. 2 is a schematic view of the structure A-A of FIG. 1;
FIG. 3 is a schematic view showing the connection of the roller, the guide bar and the ejector bar according to the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Referring to fig. 1, 2 and 3, the embodiment of the bent-bar-type failure-prevention elevator safety gear and the elevator of the present invention is shown, the bent-bar-type failure-prevention elevator safety gear comprises a lifting rod 1, a main gear body 2 and an auxiliary gear body 3, the auxiliary gear body 3 is arranged above the main gear body 2, two main wedges 5 moving upward along the vertical direction under the action of the lifting rod 1 and approaching to each other to clamp a guide rail 4 are arranged in the main gear body 2, each main wedge 5 is connected with one lifting rod 1, and two auxiliary wedges 6 moving upward along the vertical direction and approaching to each other to clamp the guide rail 4 are arranged in the auxiliary gear body 3;
an accommodating groove 20 is formed in the main wedge block 5, the opening of the accommodating groove 20 faces the guide rail 4, a roller 21 is arranged in the accommodating groove, the roller partially extends out of the accommodating groove so as to be in contact with the guide rail to drive the roller to rotate in subsequent operation, a first guide hole 22 which enables the accommodating groove 20 to be communicated with the auxiliary wedge block 6 corresponding to the vertical direction is formed in the main wedge block 5, a guide rod 23 driven to rotate by the roller is further arranged in the accommodating groove, the upper portion of the guide rod 23 is located in the first guide hole 22, a rotary guide surface 24 is arranged at the top of the guide rod 23, a second guide hole 25 is formed in the bottom of the auxiliary wedge block 6 corresponding to the main wedge block 5, a top rod 26 is arranged in the second guide hole 25, the bottom of the top rod 26 is in contact with the rotary guide surface 24 of the guide rod 23, and the lifting of the top rod.
Through setting up vice pincers bodies 3, when main pincers bodies 2 became invalid, relative slip took place with the contact of guide rail 4 for gyro wheel 21, the rotation of gyro wheel drives guide arm 23 and rotates, and guide arm 23's rotation can make the ejector pin 26 with the contact of guide arm 23 at vertical direction upward movement, thereby with vice wedge piece jack-up that makes progress, thereby vice wedge piece upward movement in-process can draw close each other and press from both sides tight guide rail, realize the braking, just so can be when main pincers bodies became invalid vice pincers bodies performance braking effect, safety factor is improved.
Generally, it is preferable that the main clamp body 2 and the auxiliary clamp body 3 are manufactured integrally, so that the safety and the stability are relatively high, and of course, the main clamp body 2 and the auxiliary clamp body 3 can be separately arranged and connected through bolts, so that the old equipment is convenient to reform, and the maintenance cost is also favorably reduced.
To the structure of the main tong body 2, be equipped with main cavity room 7 in the main tong body 2, the inside wall of main cavity room 7 is close to formation main spigot surface 8 from supreme to main cavity room 7 middle part gradually down, be equipped with two in the main cavity room 7 main voussoir 5, two leave the clearance that lets guide rail 4 pass through between the main voussoir 5, two main voussoir 5 all is equipped with the main wedge inclined plane 9 with 8 looks adaptations of main spigot surface, main voussoir 5 is the plane with the relative face of guide rail 4, and it also can understand for main cavity room 7 is the four terrace with edges on only one inclined plane, and main voussoir 5 is the four terrace with edges on only one inclined plane, and the track of main voussoir 5 upward movement can also be controlled in the time of providing main voussoir 5 lateral force to such design, guarantees that main voussoir 5 can not take place the rotation when the motion, makes main vous. The gap between the two main wedges 5 allows the guide rail to pass through when the elevator normally moves, and when emergency braking is needed, the two main wedges are close to each other, and the gap gradually disappears.
Similarly, the structure of the auxiliary clamp body 3 is similar to that of the main clamp body 2, an auxiliary cavity 10 is arranged in the auxiliary clamp body 3, the inner side wall of the auxiliary cavity 10 is gradually close to the middle of the auxiliary cavity 10 from bottom to top to form an auxiliary guide surface 11, two auxiliary wedge blocks 6 are arranged in the auxiliary cavity 10, a gap for the guide rail 4 to pass through is also reserved between the two auxiliary wedge blocks 6, the two auxiliary wedge blocks 6 are both provided with auxiliary wedge inclined surfaces 12 matched with the auxiliary guide surfaces 11, and the surfaces of the auxiliary wedge blocks 6 opposite to the guide rail 4 are planes.
In the design, the lifting rod 1 is fixedly connected with the bottom of the corresponding main wedge block 5, and when the car falls, the lifting rod 1 moves upwards to push the main wedge block 5 upwards, so that the main wedge block 5 clamps the guide rail 4 for braking.
In order to enable the roller to drive the auxiliary wedge block to brake more timely, the roller comprises a wheel shaft 27, a rubber wheel 28 and a turbine 29, the wheel shaft 27 is rotatably connected to two opposite side walls of the main chamber, the turbine 29 is sleeved on the wheel shaft 27, the rubber wheel 28 is sleeved on the wheel shaft 27 at two ends of the turbine 29 respectively, the lower portion of the guide rod 23 is a worm 30, the worm 30 is driven through the turbine 29, the accommodating space of the main wedge block can be reduced, and the rolling force of the rubber wheel 28 can be transmitted to the guide rod 23 in time to be changed into rotating force.
Since the installation of the roller, the guide rod 23 and the ejector rod 26 in the main chamber is complicated, in order to install the components more conveniently, an opening is preferably arranged on the side surface of the main chamber, so that the installation is more convenient, and after the installation is finished, the opening can be closed by the baffle plate 31 in a bolt connection mode.
The invention also discloses an elevator, and the curved bar type anti-failure elevator safety tongs adopting the technical scheme are adopted.
When the elevator car braking device is used, the lifting rod 1 is installed, if the car falls, the lifting rod 1 pushes the main wedges 5 to move upwards, the two main wedges 5 are mutually closed under the action of the main guide surface 8 to clamp the guide rail 4, the main clamp body 2 is an instant safety clamp and can immediately brake the car, at the moment, the roller hardly rotates, the main wedges 5 rise to drive the auxiliary wedges 6 to rise, the distance between the auxiliary wedges 6 can be slightly larger than the distance between the main wedges, namely, the auxiliary wedges 6 are not in contact with the guide rail 4 after the main wedges 5 rise to clamp the guide rail 4, but after the main wedges 5 do not brake the car, the roller 21 rolls to drive the turbine 29 to drive the guide rod 23 to rotate, because the top surface of the guide rod 23 is a rising rotary guide surface 24, the ejector rod 26 in contact with the top surface of the guide rod 23 is jacked upwards when the guide rod 23 rotates, and the auxiliary wedges 6 are mutually closed to clamp the guide rail 4 under the action of the auxiliary guide surface 11, therefore, when the main clamp body 2 fails, the auxiliary clamp body 3 plays a role of stopping the car, and the safety of the elevator is ensured.
The above description is only an embodiment of the present invention, but the technical features of the present invention are not limited thereto, and any changes or modifications within the technical field of the present invention by those skilled in the art are covered by the claims of the present invention.

Claims (10)

1. Bent lever-type elevator safety tongs that fail that prevents, its characterized in that: the clamp comprises a lifting rod (1), a main clamp body (2) and an auxiliary clamp body (3), wherein the auxiliary clamp body (3) is arranged above the main clamp body (2), two main wedge blocks (5) which move upwards along the vertical direction under the action of the lifting rod (1) and mutually approach to a clamping guide rail (4) are arranged in the main clamp body (2), each main wedge block (5) is connected with one lifting rod (1), and two auxiliary wedge blocks (6) which move upwards along the vertical direction and mutually approach to the clamping guide rail (4) are arranged in the auxiliary clamp body (3); holding tank (20) have been seted up in main voussoir (5), holding tank (20) opening is towards guide rail (4), be equipped with gyro wheel (21) in the holding tank, main voussoir (5) have still been opened and have made holding tank (20) and vertical direction correspond vice voussoir (6) communicating first guiding hole (22), still be equipped with in holding tank (20) by gyro wheel (21) drive rotatory guide arm (23), the upper portion of guide arm is located first guiding hole (22), the top of guide arm (23) is equipped with rotatory spigot surface (24), corresponds with main voussoir the bottom of vice voussoir is opened and is had second guiding hole (25), be equipped with the top of ejector pin (26) in the second guiding hole, the bottom of ejector pin and the rotatory spigot surface contact of guide arm, by the lift of the rotatory control ejector pin of guide arm.
2. The knee lever type failure-prevention elevator safety gear according to claim 1, characterized in that: the main clamp body (2) and the auxiliary clamp body (3) are integrally arranged; or the main clamp body (2) and the auxiliary clamp body (3) are fixedly connected through bolts.
3. The knee lever type failure-prevention elevator safety gear according to claim 1, characterized in that: be equipped with main cavity room (7) in the main tong body (2), the inside wall of main cavity room (7) is from supreme being close to formation main spigot surface (8) to main cavity room (7) middle part gradually down, be equipped with two in main cavity room (7) main voussoir (5), two leave the clearance that lets guide rail (4) pass through between main voussoir (5), two main voussoir (5) all are equipped with main wedge inclined plane (9) with main spigot surface (8) looks adaptation.
4. The knee lever type failure-prevention elevator safety gear according to claim 3, characterized in that: the surface of the main wedge block (5) opposite to the guide rail (4) is a plane.
5. The knee lever type failure-prevention elevator safety gear according to claim 1, characterized in that: be equipped with vice cavity (10) in vice pincers body (3), the inside wall of vice cavity (10) is close to formation vice spigot surface (11) from supreme down to vice cavity (10) middle part gradually, be equipped with two in vice cavity (10) vice voussoir (6), two also leave the clearance that lets guide rail (4) pass through between vice voussoir (6), two vice voussoir (6) all are equipped with vice wedge inclined plane (12) with vice spigot surface (11) looks adaptation.
6. The knee lever type failure-prevention elevator safety gear according to claim 5, characterized in that: the surface of the auxiliary wedge block (6) opposite to the guide rail (4) is a plane.
7. The knee lever type failure-prevention elevator safety gear according to claim 1, characterized in that: the lifting rod (1) is fixedly connected with the bottom of the corresponding main wedge block (5).
8. The knee lever type failure-prevention elevator safety gear according to claim 1, characterized in that: the roller comprises a wheel shaft (27), a rubber wheel (28) and a turbine (29), the wheel shaft is rotatably connected to two opposite side walls of the main chamber, the turbine is sleeved on the wheel shaft, the rubber wheel is sleeved on the wheel shaft at two ends of the turbine respectively, and a worm (30) is arranged at the lower part of the guide rod.
9. The knee lever type failure-prevention elevator safety gear according to claim 1, characterized in that: the side of the main cavity is open, and the side of the main clamp body is provided with a baffle (31) for closing the opening.
10. An elevator characterized in that: use of a knee lever fail safe elevator safety gear according to any one of claims 1 to 9.
CN202010713708.7A 2020-07-20 Curved rod type anti-failure elevator safety tongs and elevator Active CN111776914B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010713708.7A CN111776914B (en) 2020-07-20 Curved rod type anti-failure elevator safety tongs and elevator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010713708.7A CN111776914B (en) 2020-07-20 Curved rod type anti-failure elevator safety tongs and elevator

Publications (2)

Publication Number Publication Date
CN111776914A true CN111776914A (en) 2020-10-16
CN111776914B CN111776914B (en) 2024-05-24

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1783087A2 (en) * 2005-10-14 2007-05-09 Thyssenkrupp Elevadores, S.A. Double-effect emergency braking apparatus for elevator cars
CN204355901U (en) * 2014-12-08 2015-05-27 苏州莱茵电梯制造有限公司 The safety tongs of curve motion elevator
CN106219351A (en) * 2016-08-30 2016-12-14 浙江西子富沃德电机有限公司 A kind of bidirectional safety tongs
CN206051205U (en) * 2016-08-30 2017-03-29 浙江西子富沃德电机有限公司 A kind of elevator bidirectional safety tongs
CN212403066U (en) * 2020-07-20 2021-01-26 台州学院 Bent lever type failure-proof elevator safety tongs and elevator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1783087A2 (en) * 2005-10-14 2007-05-09 Thyssenkrupp Elevadores, S.A. Double-effect emergency braking apparatus for elevator cars
CN204355901U (en) * 2014-12-08 2015-05-27 苏州莱茵电梯制造有限公司 The safety tongs of curve motion elevator
CN106219351A (en) * 2016-08-30 2016-12-14 浙江西子富沃德电机有限公司 A kind of bidirectional safety tongs
CN206051205U (en) * 2016-08-30 2017-03-29 浙江西子富沃德电机有限公司 A kind of elevator bidirectional safety tongs
CN212403066U (en) * 2020-07-20 2021-01-26 台州学院 Bent lever type failure-proof elevator safety tongs and elevator

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