CN111776911A - Failure-prevention elevator safety tongs and elevator - Google Patents
Failure-prevention elevator safety tongs and elevator Download PDFInfo
- Publication number
- CN111776911A CN111776911A CN202010713644.0A CN202010713644A CN111776911A CN 111776911 A CN111776911 A CN 111776911A CN 202010713644 A CN202010713644 A CN 202010713644A CN 111776911 A CN111776911 A CN 111776911A
- Authority
- CN
- China
- Prior art keywords
- main
- auxiliary
- vice
- clamp body
- voussoir
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 210000000080 chela (arthropods) Anatomy 0.000 claims description 15
- 230000006978 adaptation Effects 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 6
- 238000013459 approach Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Types And Forms Of Lifts (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses an anti-failure elevator safety tongs, which comprises a lifting rod, a main tong body and an auxiliary tong body, wherein the auxiliary tong body is arranged above the main tong body, an accommodating groove is formed in the main wedge block, the opening of the accommodating groove faces to a guide rail, a roller is arranged in the accommodating groove, a guide hole communicated with an auxiliary wedge block corresponding to the vertical direction is also formed in the accommodating groove, an ejector rod is arranged in the guide hole, the bottom end of the ejector rod extends into the accommodating groove and is connected with a disc, the disc is tightly contacted with the roller, the top end of the ejector rod is in threaded connection with a nut, an ejector hole matched with the nut is formed in the bottom of the auxiliary wedge block, and the height of the ejector hole is. Also discloses an elevator, which adopts the safety tongs. The invention has the advantages that: by arranging the auxiliary clamp body, when the main clamp body fails, the auxiliary clamp body can play a role in generating braking force. And the elevator adopting the safety tongs has double protection and is safer.
Description
Technical Field
The invention relates to an anti-failure 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 an anti-failure elevator safety gear and an elevator, and can effectively solve the problem that the existing elevator has only one pair of safety gears and is insufficient in safety coefficient.
In order to solve the technical problems, the invention is realized by the following technical scheme: the 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 a clamping 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 the clamping guide rail are arranged in the auxiliary tong body;
open in the main voussoir has the holding tank, the holding tank opening is towards the guide rail, be equipped with the gyro wheel in the holding tank, the main voussoir still opens the communicating guiding hole of vice voussoir that makes holding tank and vertical direction correspond, be equipped with the ejector pin in the guiding hole, the bottom of ejector pin stretches into in the holding tank and is connected with the disc, disc and gyro wheel in close contact with, the top and the nut threaded connection of ejector pin, open the bottom of vice voussoir has the apical pore with nut looks adaptation, the height that highly is greater than the nut of apical pore.
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 cross section of the nut is a regular polygon, the cross section of the top hole is the same as that of the nut, and the top of the nut is in close contact with the top of the top hole. Regular polygon is easy to process and is not easy to slip the nut and the top hole.
Preferably, the roller comprises a roller shaft, a mandrel and two rubber wheels, the mandrel is fixed on the roller shaft, the rubber wheels are respectively fixed on the roller shafts at two ends of the mandrel, one of the rubber wheels is in close contact with the disc, the circle center of the disc is not overlapped with the rubber wheel, and the diameter of the mandrel is smaller than that of the rubber wheel. The tight contact of a rubber wheel and the disc eccentricity guarantees that the rubber wheel can drive the disc to rotate, so that the relative position of the nut rises to jack up the auxiliary clamp body, the diameter of the mandrel is larger than that of the rubber wheel, and the mandrel cannot interfere with the rotation of the disc when the roller rotates.
An elevator adopts above-mentioned elevator safety tongs of preventing becoming invalid.
Compared with the prior art, the invention has the advantages that: through setting up vice pincers body, when the main pincers body became invalid, the drive gyro wheel continued to roll, and the gyro wheel will drive the disc and rotate to make the ejector pin take place to rotate, because the nut can not rotate, so the nut takes place to remove with the ejector pin vertical direction, pushes up vice pincers body, makes the interval between two vice pincers bodies reduce, and two vice pincers bodies will hug closely the guide rail, begin to the braking, thereby vice pincers body performance braking effect when the main pincers body became invalid has ensured the safety of car. 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 view of the structure of the fail-safe elevator safety gear of the present invention;
FIG. 2 is a schematic view of the structure A-A in FIG. 1.
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 and 2, the embodiment of the failure-prevention elevator safety gear and the elevator of the invention is shown, the 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 upwards along the vertical direction under the action of the lifting rod 1 and approaching to a clamping 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 upwards along the vertical direction and approaching to the clamping guide rail 4 are arranged in the auxiliary gear body 3;
there is holding tank 20 in the main voussoir 5, holding tank 20 opening is towards guide rail 4, be equipped with gyro wheel 21 in the holding tank, the holding tank is stretched out to the gyro wheel part to can drive the gyro wheel with the guide rail contact and rotate in the follow-up operation, main voussoir 5 has still opened the communicating guiding hole 22 of vice voussoir 6 that makes holding tank 20 correspond with vertical direction, be equipped with ejector pin 23 in the guiding hole 22, the bottom of ejector pin 23 is stretched into in holding tank 20 and is connected with disc 24, disc 24 and gyro wheel 21 in close contact with, the top and the nut 25 threaded connection of ejector pin 23, the apical pore 26 with nut 25 looks adaptation is opened to the bottom of vice voussoir 6.
Through setting up vice pincers body, when the main pincers body became invalid, the drive gyro wheel continued to roll, and the gyro wheel will drive the disc and rotate to make the ejector pin take place to rotate, because the nut can not rotate, so the nut takes place to remove with the ejector pin vertical direction, pushes up vice pincers body, makes the interval between two vice pincers bodies reduce, and two vice pincers bodies will hug closely the guide rail, begin to the braking, thereby vice pincers body performance braking effect when the main pincers body became invalid has ensured the safety of car. After the elevator adopts above-mentioned structure, for ordinary elevator dual guarantee has been had occasionally in the inefficacy, ensure car safety.
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 nut 25 and the ejector rod 23 to generate relative movement in the vertical direction when the ejector rod 23 rotates, the cross section of the nut 25 is a regular polygon, the cross section of the top hole 26 is the same as that of the nut 25, the top of the nut 25 is in close contact with the top of the top hole 26, the cross section of the nut 25 is generally a regular hexagon, and in order to lengthen the relative movement distance between the nut 25 and the ejector rod 23, the nut 25 can be made as long as possible in the height direction, so that a long movement stroke can be obtained.
The roller 21 needs to drive the disc 24 to rotate when rolling, so the roller 21 generally comprises a roller 27, a mandrel 28 and two rubber wheels 29, the mandrel 28 is fixed on the roller 27, the roller 27 at two ends of the mandrel 28 is respectively fixed with one rubber wheel 29, one rubber wheel 29 is tightly contacted with the disc 24, the circle center of the disc 24 is not overlapped with the rubber wheel 29, and the diameter of the mandrel 28 is smaller than that of the rubber wheel 29, so that the disc 24 is driven to rotate when the rubber wheel 29 of the roller is contacted with the guide rail 4 to rotate, and the ejector rod 23 is driven to rotate relative to the nut 25.
The invention also discloses an elevator, and the anti-failure elevator safety tongs adopting the technical scheme are adopted.
When the lifting device is used, the lifting rod 1 is installed, if the lift car falls, the lifting rod 1 pushes the main wedges 5 to move upwards, the two main wedges 5 are close to each other under the action of the main guide surface 8 to clamp the guide rail 4, in the process, the main wedges 5 move upwards to drive the ejector rod 23 to move upwards, meanwhile, the main clamp body 2 is clamped on the guide rail 4 and cannot stand immediately, the roller 21 also rotates, the driving disc 24 drives the ejector rod 23 to rotate, so that the nut 25 and the ejector rod 23 can move relatively in the vertical direction, in order to eliminate the influence on the auxiliary wedge 6, the auxiliary wedge 6 cannot be in contact with the guide rail 4, the numerical value that the height of the ejection hole is larger than the height of the nut is calculated, namely, the height difference between the ejection hole and the nut is larger than the sum of the lifting height of the main wedges when braking and the lifting height of the nut relative to the ejector rod when braking, the auxiliary clamp body 3 does not play a role when the main clamp body 2 brakes, the loss of the auxiliary caliper body 3 caused by braking is reduced, and the main caliper body 2 can also play a role after braking, so that the braking distance and the braking time are shortened. If the main caliper body 2 fails and the car descends continuously, the roller 21 drives the disc 24 to rotate continuously, the ejector rod 23 also rotates continuously relative to the nut 25, the nut 25 moves upwards to jack the auxiliary wedge block 6 upwards, the distance component between the two auxiliary wedge blocks 6 is reduced due to the interaction of the auxiliary guide surface 11 and the auxiliary wedge inclined surface 12, the two auxiliary wedge blocks 6 clamp the guide rail 4 tightly, braking is started, and the car stops falling. Therefore, after the main clamp body 2 fails, the auxiliary clamp body 3 plays a role, 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. Prevent elevator safety tongs that became invalid, 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 the communicating guiding hole (22) of vice voussoir (6) that vertical direction corresponds, be equipped with ejector pin (23) in guiding hole (22), the bottom of ejector pin (23) is stretched into in holding tank (20) and is connected with disc (24), disc (24) and gyro wheel (21) in close contact with, the top and nut (25) threaded connection of ejector pin (23), top hole (26) with nut (25) looks adaptation are opened to the bottom of vice voussoir (6), the height of top hole is greater than the height of nut.
2. The fail-safe elevator safety gear set of claim 1, wherein: 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 fail-safe elevator safety gear set of claim 1, wherein: 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 fail-safe elevator safety gear set of claim 3, wherein: the surface of the main wedge block (5) opposite to the guide rail (4) is a plane.
5. The fail-safe elevator safety gear set of claim 1, wherein: 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 fail-safe elevator safety gear set of claim 5, wherein: the surface of the auxiliary wedge block (6) opposite to the guide rail (4) is a plane.
7. The fail-safe elevator safety gear set of claim 1, wherein: the lifting rod (1) is fixedly connected with the bottom of the corresponding main wedge block (5).
8. The fail-safe elevator safety gear set of claim 1, wherein: the cross section of the nut (25) is a regular polygon, the cross section of the top hole (26) is the same as that of the nut (25), and the top of the nut (25) is tightly contacted with the top of the top hole (26).
9. The fail-safe elevator safety gear set of claim 1, wherein: the roller (21) comprises a roller (27), a mandrel (28) and two rubber wheels (29), the mandrel (28) is fixed on the roller (27), the roller (27) at the two ends of the mandrel (28) is respectively fixed with one rubber wheel (29), one of the rubber wheels (29) is in close contact with the disc (24), the circle center of the disc (24) is not overlapped with the rubber wheels (29), and the diameter of the mandrel (28) is smaller than that of the rubber wheels (29).
10. An elevator characterized in that: use of the fail safe elevator safety gear of any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010713644.0A CN111776911B (en) | 2020-07-20 | 2020-07-20 | Failure-proof elevator safety tongs and elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010713644.0A CN111776911B (en) | 2020-07-20 | 2020-07-20 | Failure-proof elevator safety tongs and elevator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111776911A true CN111776911A (en) | 2020-10-16 |
| CN111776911B CN111776911B (en) | 2024-05-03 |
Family
ID=72764807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010713644.0A Active CN111776911B (en) | 2020-07-20 | 2020-07-20 | Failure-proof elevator safety tongs and elevator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111776911B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022178843A1 (en) * | 2021-02-26 | 2022-09-01 | 杭州沪宁电梯部件股份有限公司 | Brake assembly for safety protection device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203820234U (en) * | 2014-05-15 | 2014-09-10 | 快客电梯有限公司 | Elevator speed limiter |
| CN104401837A (en) * | 2014-12-08 | 2015-03-11 | 苏州莱茵电梯制造有限公司 | Safety tongs for curve operation elevator |
| CN105905740A (en) * | 2016-06-25 | 2016-08-31 | 浙江南奥电梯有限公司 | Elevator safety clamp |
| CN106241549A (en) * | 2016-08-30 | 2016-12-21 | 浙江西子富沃德电机有限公司 | A kind of elevator bidirectional safety tongs |
| CN212403067U (en) * | 2020-07-20 | 2021-01-26 | 台州学院 | Failure-prevention elevator safety tongs and elevator |
-
2020
- 2020-07-20 CN CN202010713644.0A patent/CN111776911B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203820234U (en) * | 2014-05-15 | 2014-09-10 | 快客电梯有限公司 | Elevator speed limiter |
| CN104401837A (en) * | 2014-12-08 | 2015-03-11 | 苏州莱茵电梯制造有限公司 | Safety tongs for curve operation elevator |
| CN105905740A (en) * | 2016-06-25 | 2016-08-31 | 浙江南奥电梯有限公司 | Elevator safety clamp |
| CN106241549A (en) * | 2016-08-30 | 2016-12-21 | 浙江西子富沃德电机有限公司 | A kind of elevator bidirectional safety tongs |
| CN212403067U (en) * | 2020-07-20 | 2021-01-26 | 台州学院 | Failure-prevention elevator safety tongs and elevator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022178843A1 (en) * | 2021-02-26 | 2022-09-01 | 杭州沪宁电梯部件股份有限公司 | Brake assembly for safety protection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111776911B (en) | 2024-05-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108407840B (en) | Ground track-changing facility for track gauge-changing bogie | |
| CN212403067U (en) | Failure-prevention elevator safety tongs and elevator | |
| WO2020177758A1 (en) | Running system for elevator, and multi-car elevator running system | |
| CN113479769B (en) | Single track hangs two-way swift current car device of preventing based on interior ratchet | |
| CN111776911A (en) | Failure-prevention elevator safety tongs and elevator | |
| CN111498639A (en) | Disconnect-type safety tongs linkage and carry and draw mechanism | |
| CN213112100U (en) | Cam type failure-prevention elevator safety tongs and elevator | |
| CN111776913B (en) | Bent lever type anti-failure elevator safety tongs and elevator | |
| WO2020191926A1 (en) | Hybrid drive conversion device for track and track system using same | |
| CN212374652U (en) | Safety brake device for elevator | |
| CN105217402A (en) | Prevent brake equipment and the method for elevator accidental movement | |
| CN111776909B (en) | Cam type anti-failure elevator safety tongs and elevator | |
| CN213415930U (en) | Pulley type anti-failure elevator safety tongs and elevator | |
| CN111776914B (en) | Curved rod type anti-failure elevator safety tongs and elevator | |
| CN101700849B (en) | Manual rescue device of lifts | |
| CN212403066U (en) | Bent lever type failure-proof elevator safety tongs and elevator | |
| CN212387523U (en) | Elevator safety tongs and elevator | |
| CN213265219U (en) | Anti-failure elevator safety tongs and elevator | |
| CN111776908A (en) | Anti-failure elevator safety tongs and elevator | |
| CN111776908B (en) | Failure-preventing elevator safety tongs and elevator | |
| CN111776914A (en) | Bent lever type failure-proof elevator safety tongs and elevator | |
| CN111776912A (en) | Elevator safety tongs and elevator | |
| CN111776910B (en) | Pulley type failure-proof elevator safety tongs and elevator | |
| CN210710396U (en) | Hydropower station movable hoist operation mechanism suitable for preventing gnawing rail | |
| CN207827759U (en) | A kind of novel hydraulic elevator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Bi Cheng Inventor after: Wang Hongyun Inventor after: Wu Keqian Inventor before: Wu Keqian Inventor before: Wang Hongyun Inventor before: Bi Cheng |
|
| CB03 | Change of inventor or designer information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |