CN111847184B - Construction elevator emergency braking device - Google Patents
Construction elevator emergency braking device Download PDFInfo
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- CN111847184B CN111847184B CN202010753590.0A CN202010753590A CN111847184B CN 111847184 B CN111847184 B CN 111847184B CN 202010753590 A CN202010753590 A CN 202010753590A CN 111847184 B CN111847184 B CN 111847184B
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- elevator cage
- piston
- elevator
- plunger
- blind hole
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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
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Types And Forms Of Lifts (AREA)
Abstract
The invention relates to an emergency braking device for a construction elevator, which effectively solves the problems that the emergency braking device for the construction elevator is easy to malfunction and has limited braking force; the technical scheme includes that the elevator cage comprises a guide rail frame and an elevator cage, the elevator cage can move along the guide rail frame, a vertical rack is fixed on the front side of the guide rail frame, a vertical upright post with a rectangular cross section is fixed on the position of the front side of the guide rail frame deviated to the left, a rectangular sleeve is fixed on the rear wall of the elevator cage, the rectangular sleeve is sleeved on the upright post and is in clearance fit with the upright post, and the elevator cage can generate a small deflection when losing weight so that the rectangular sleeve is locked on the upright post for braking; the elevator self-locking device can realize self-locking when the elevator falls, and the larger the self weight of the elevator cage is, the larger the locking force is, the effective braking of the elevator cage can be realized, the working is reliable, the falling accident is avoided, and the casualty loss of personnel and equipment is greatly reduced.
Description
Technical Field
The invention relates to the field of buildings, in particular to an emergency braking device for a construction elevator.
Background
The construction elevator is material personnel lifting equipment indispensable to high-rise building construction, and the falling of an elevator cage is the most serious elevator accident with the greatest harm, so emergency braking devices are arranged on the elevators, and are started to brake the elevator when the elevator is weightless and falls down; the existing emergency braking device is generally of a clamping type or a clamping type, the device is easy to malfunction, braking force is limited, braking performance is unreliable, particularly for elevators with large carrying capacity, the accident rate is higher, and the elevator falling accident is still frequent, for example, 7 persons are injured when a construction elevator falls in Chaozhou city in 2020 and 4 months, and 19 persons are in distress when a construction elevator falls in Wuhan 'east lake garden' in 2012, all because the elevator emergency braking device is out of work, the accidents are similar to the accidents.
Disclosure of Invention
Aiming at the situation, the invention provides the emergency braking device for the construction elevator to overcome the defects of the prior art, and effectively solves the problems that the emergency braking device for the construction elevator is easy to malfunction and has limited braking force.
The technical scheme for solving the problem is that the emergency braking device for the construction elevator comprises a guide rail frame and an elevator cage which are of vertical rectangular steel structures, wherein vertical round pipes are arranged at four edges of the guide rail frame, two groups of connecting components which are arranged at intervals left and right are arranged on the rear wall of the elevator cage, each connecting component comprises a three-quarter circular-arc shell, three pulleys are uniformly distributed on the circumference of the inner wall of each shell, and the shells and the pulleys of the two groups of connecting components are tightly embraced on the two round pipes on the front side, so that the connection between the elevator cage and the guide rail frame is realized; a horizontal left transverse shaft and a horizontal right transverse shaft are fixed on the rear wall of the elevator cage, the rear end of the left transverse shaft is rotatably arranged on the left shell, an arc-shaped groove is formed in the front side surface of the right shell, and the rear end of the right transverse shaft extends into the arc-shaped groove, so that the elevator cage can rotate around the left transverse shaft; a horizontal first blind hole is formed in the shell on the right side, a sliding block is installed in the first blind hole, a first pressure spring is installed between the left end of the sliding block and the bottom of the first blind hole, and the right end of the sliding block can extend into the arc-shaped groove to be supported below the right transverse shaft; a vertical rack is fixed on the front side of the guide rail frame, a first gear and a second gear which are meshed with the rack are installed on the rear wall of the elevator cage, the first gear is connected with a driving motor, an end face cam is coaxially fixed on the second gear, a piston cylinder in the left-right direction is fixed on the rear wall of the elevator cage, a left piston is installed in the piston cylinder, a first pull rope is connected between the right end of the left piston and the left end of a sliding block, a first air inlet hole and a first air exhaust hole which are located on the right side of the left piston are formed in the side wall of the piston cylinder, a plunger pump is installed on the piston cylinder, an air vent pipe is connected between the plunger pump and the air inlet hole, a first check valve is installed on the air vent pipe, the outer end of a push rod of the plunger pump is in contact with the end face cam, the end face cam can drive the plunger pump to pump air into the piston cylinder, and the air pumping speed of the plunger pump is less than or equal to the air exhaust speed of the first air exhaust hole when the elevator cage is normally lifted; a vertical upright post with a rectangular cross section is fixed at the left-deviated position of the front side of the guide rail frame, a rectangular sleeve is fixed on the back wall of the elevator cage, and the rectangular sleeve is sleeved on the upright post and is in clearance fit with the upright post.
The elevator self-locking device can realize self-locking when the elevator falls, and the larger the self weight of the elevator cage is, the larger the locking force is, the effective braking of the elevator cage can be realized, the working is reliable, the falling accident is avoided, and the casualty loss of personnel and equipment is greatly reduced.
Drawings
FIG. 1 is a top view of the present invention.
Fig. 2 is an enlarged view of the a position.
Fig. 3 is a front view of the present invention in normal operation.
Fig. 4 is a front view of the elevator car after deflection.
Fig. 5 is an enlarged view of the position B in fig. 2.
FIG. 6 is an enlarged view of the B position after the brake block is ejected.
Fig. 7 is an enlarged view of the position C in fig. 2.
Fig. 8 is an enlarged view of the position D in fig. 2.
Fig. 9 is an enlarged view of the position E in fig. 3.
FIG. 10 is a front cross-sectional view of the arcuate slot position.
FIG. 11 is a front cross-sectional view of the right cross-axis moving down the position of the rear arc-shaped groove.
Figure 12 is a front cross-sectional view of the rectangular sheath in its normal operating position.
FIG. 13 is a front cross-sectional view of the position of the rectangular sleeve during braking.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.
As shown in fig. 1 to 13, the elevator car comprises a vertical guide rail frame 1 and an elevator car 2 which are made of rectangular steel structures, wherein vertical round pipes 3 are arranged at four edges of the guide rail frame 1, two groups of connecting assemblies which are arranged at intervals left and right are arranged on the rear wall of the elevator car 2, each connecting assembly comprises a three-quarter arc-shaped shell 4, three pulleys 5 are uniformly distributed on the circumference of the inner wall of each shell 4, and the shells 4 and the pulleys 5 of the two groups of connecting assemblies are tightly embraced on the two round pipes 3 on the front side, so that the connection between the elevator car 2 and the guide rail frame 1 is realized; a horizontal left transverse shaft 6 and a horizontal right transverse shaft 7 are fixed on the rear wall of the elevator cage 2, the rear end of the left transverse shaft 6 is rotatably mounted on the left shell 4, an arc-shaped groove 8 is formed in the front side surface of the right shell 4, and the rear end of the right transverse shaft 7 extends into the arc-shaped groove 8, so that the elevator cage 2 can rotate around the left transverse shaft 6; a horizontal first blind hole 9 is formed in the shell 4 on the right side, a sliding block is arranged in the first blind hole 9, a first pressure spring 11 is arranged between the left end of the sliding block and the bottom of the first blind hole 9, and the right end of the sliding block can extend into the arc-shaped groove 8 to be supported below the right cross shaft 7; a vertical rack 12 is fixed on the front side of the guide rail frame 1, a first gear 13 and a second gear 14 which are meshed with the rack 12 are installed on the rear wall of the elevator cage 2, the first gear 13 is connected with a driving motor 15, an end face cam 16 is coaxially fixed on the second gear 14, a piston cylinder 17 in the left-right direction is fixed on the rear wall of the elevator cage 2, a left piston 18 is installed in the piston cylinder 17, a first pull rope 19 is connected between the right end of the left piston 18 and the left end of a sliding block, a first air inlet hole 20 and a first air outlet hole 21 which are positioned on the right side of the left piston 18 are formed in the side wall of the piston cylinder 17, a plunger pump 22 is installed on the piston cylinder 17, a vent pipe is connected between the plunger pump 22 and the air inlet hole, a first check valve 43 is installed on the vent pipe, the outer end of a push rod 23 of the plunger pump 22 is contacted with the end face cam 16, the end face cam 16 rotates to drive the plunger pump 22 to pump air into the piston cylinder 17, the pumping speed of the plunger pump 22 is less than or equal to the exhaust speed of the first exhaust hole 21 when the elevator cage 2 is normally lifted; a vertical upright post 24 with a rectangular cross section is fixed at the left-biased position of the front side of the guide rail frame 1, a rectangular sleeve 25 is fixed on the rear wall of the elevator cage 2, and the rectangular sleeve 25 is sleeved on the upright post 24 and is in clearance fit with the upright post 24.
A radial second blind hole 26 is formed in the inner wall of the shell 4 on the left side, a brake block 27 is installed in the second blind hole 26, the brake block 27 can slide in the second blind hole 26, a second pressure spring 28 is installed between the brake block 27 and the bottom of the second blind hole 26, a third blind hole 29 vertical to the second blind hole is formed in the side wall of the second blind hole 26, a clamping block 30 capable of sliding in the third blind hole 29 is installed in the third blind hole 29, a third pressure spring 31 is installed between the clamping block 30 and the bottom of the third blind hole 29, a clamping groove 32 is formed in the side wall of the brake block 27, and under the action of the third pressure spring 31, the outer end of the clamping block 30 is clamped in the clamping groove 32; the piston cylinder 17 is also internally provided with a right piston 33, the left piston 18 and the right piston 33 are arranged at a left-right interval, the first air inlet hole 20 and the first air outlet hole 21 are positioned between the left piston 18 and the right piston 33, a second pull rope 34 is connected between the left end surface of the right piston 33 and the inner end of the fixture block 30, the right piston 33 moves rightwards to pull the fixture block 30 out of the clamping groove 32, and the brake block 27 is outwards popped out to compress the round pipe 3 under the action of the second pressure spring 28 to brake and decelerate the left connecting assembly.
The piston cylinder 17 is provided with a limit protrusion at the inner wall position between the left piston 18 and the right piston 33, which can prevent the left piston 18 and the right piston 33 from moving towards the middle to cover the first air inlet hole 20 and the first air outlet hole 21.
The plunger pump 22 comprises a plunger 36 cylinder 35 in the left-right direction, a plunger 36 is installed in the plunger 36 cylinder 35, a fourth pressure spring 37 is installed between the plunger 36 and the left end of the plunger 36 cylinder 35, the push rod 23 is fixed at the right end of the plunger 36, the right end of the push rod 23 extends out of the plunger 36 cylinder 35 to be in contact with the end face cam 16, a second air inlet hole 38 and a second air outlet hole 39 are formed in the left end of the plunger 36 cylinder 35, the second air outlet hole 39 is communicated with the first air inlet hole 20 through a vent pipe, a second check valve 40 is installed outside the second air inlet hole 38, the plunger 36 can suck air through the second air inlet hole 38 when moving rightwards, and the plunger 36 can pump air into the piston cylinder 17 through the vent pipe when moving leftwards.
Each shell 4 consists of two arcs which are connected through a flange, so that the shell 4 and the pulley 5 in the shell can be buckled on the circular tube 3 and then connected through bolts, and the shell 4 can be installed and detached on the circular tube 3.
The arc-shaped groove 8 is through from front to back, the rear end of the right cross shaft 7 penetrates through the arc-shaped groove 8 and is provided with a convex edge 41, and the cross shaft can be prevented from being pulled out of the arc-shaped groove 8.
The outer wall of the upright post 24 and the inner wall of the rectangular sleeve 25 are both provided with teeth 42, so that the self-locking capacity between the two can be increased.
Rope holes for the pull rope to pass through are formed in the two shells 4 and the side wall of the piston cylinder 17.
When the elevator cage is normally used, the right rotating shaft is positioned at the upper end of the arc-shaped groove 8, the sliding block extends into the arc-shaped groove 8 under the action of the first pressure spring 11 to be supported below the right transverse shaft 7, so that the right transverse shaft 7 cannot move downwards, the clamping block 30 is clamped into the clamping groove 32 on the brake block 27 under the action of the third pressure spring 31, the brake block 27 is not contacted with the circular pipe 3, the second pressure spring 28 is in a compression state, the elevator cage 2 is in a horizontal rotating state at the moment, and the rectangular sleeve 25 and the upright post 24 are sleeved outside the upright post 24 in parallel; the driving motor 15 drives the first gear 13 to rotate so that the first gear 13 moves up and down along the rack 12, thereby realizing the lifting of the elevator cage 2; in the normal lifting process of the elevator cage 2, the second gear 14 moves up and down along the rack 12 along with the elevator cage 2, so that the second gear 14 drives the end face cam 16 to rotate, the end face cam 16 rotates to push the push rod 23, and the push rod 23 and the plunger 36 can move left and right under the action of the fourth pressure spring 37, so that the air suction and pumping action of the plunger pump 22 is realized; however, since the lift speed is limited when the cage 2 is normally operated and the rotational speeds of the second gear 14 and the end cam 16 are limited, the pumping speed of the plunger pump 22 is slow, and the pumping speed of the plunger pump 22 into the piston cylinder 17 is equal to or lower than the exhaust speed of the first exhaust hole 21 in the piston cylinder 17 in the range of the normal lift speed of the cage 2, and therefore the left piston 18 and the right piston 33 do not move to both sides.
When a sudden falling accident occurs, the falling speed of the elevator car 2 is increased sharply, the rotating speed of the second gear 14 and the end cam 16 is increased sharply, the speed of pumping air into the piston cylinder 17 by the plunger pump 22 is increased to be greater than the exhaust speed of the first exhaust hole 21, so the air pressure at the middle position of the piston cylinder 17 is increased, thereby the left piston 18 is pushed to move leftwards, the right piston 33 moves rightwards, the left piston 18 moves leftwards, the slide block is pulled by the first pull rope 19 to move leftwards by overcoming the action of the first compression spring 11, the slide block retreats from the arc-shaped groove 8 to retract into the first blind hole 9, the force application point is lost below the right cross shaft 7, the right piston 33 moves rightwards, the fixture block 30 is pulled by the second pull rope 34 to move rightwards by overcoming the action of the third compression spring 31, the fixture block 30 retreats from the clamping groove 32 to retract into the third blind hole 29, and the brake block 27 extends outwards under the action of the second compression spring 28 to compress the outer wall of the circular tube 3, the gliding speed of the connecting assembly on the left side is reduced, and under the action of the left and right speed difference and the unbalanced weight of the elevator cage 2 on the two sides of the rectangular sleeve 25, the right side of the elevator cage 2 can deflect downwards, and the right cross shaft 7 moves downwards along the arc-shaped groove 8; after the elevator cage 2 deflects, the rectangular sleeve 25 deflects along with the elevator cage 2, so that the upper end and the lower end of the rectangular sleeve 25 are clamped on the upright posts 24, under the biasing action of the elevator cage 2, the rectangular sleeve 25 and the upright posts 24 realize self-locking, and the heavier the elevator cage 2 is, the larger the self-locking force is, thereby realizing the effective braking of the elevator cage 2.
The reason that the second gear 14 is designed to drive the end face cam 16 without directly driving the rotating disc by using the first gear 13 is that the first gear 13 is a stressed gear, so that the risk of damage is higher, and therefore the second gear 14 is designed to avoid the problem that the self-locking mechanism cannot effectively respond to the falling accident caused by the damage of the first gear 13.
According to the invention, through the special installation mode of the elevator cage 2, the elevator cage 2 can generate a small deflection during weightlessness, so that the rectangular sleeve 25 and the upright post 24 are locked, and the larger the self weight of the elevator cage 2 is, the larger the locking force is, so that the effective braking of the elevator cage 2 can be realized, the falling accident can be avoided, and the casualty loss of personnel and equipment can be greatly reduced.
Claims (7)
1. A construction elevator emergency braking device comprises a vertical guide rail frame (1) and an elevator cage (2) which are of rectangular steel structures, and is characterized in that four edges of the guide rail frame (1) are vertical round pipes (3), the rear wall of the elevator cage (2) is provided with two groups of connecting components which are arranged at intervals left and right, each connecting component comprises a three-quarter arc-shaped shell (4), three pulleys (5) are uniformly distributed on the circumference of the inner wall of each shell (4), and the shells (4) and the pulleys (5) of the two groups of connecting components are tightly held on the two round pipes (3) on the front side, so that the connection between the elevator cage (2) and the guide rail frame (1) is realized; a horizontal left transverse shaft (6) and a horizontal right transverse shaft (7) are fixed on the rear wall of the elevator cage (2), the rear end of the left transverse shaft (6) is rotatably installed on the left shell (4), an arc-shaped groove (8) is formed in the front side surface of the right shell (4), and the rear end of the right transverse shaft (7) extends into the arc-shaped groove (8), so that the elevator cage (2) can rotate around the left transverse shaft (6); a horizontal first blind hole (9) is formed in the shell (4) on the right side, a sliding block is installed in the first blind hole (9), a first pressure spring (11) is installed between the left end of the sliding block and the bottom of the first blind hole (9), and the right end of the sliding block can extend into the arc-shaped groove (8) to be supported below the right transverse shaft (7); a vertical rack (12) is fixed on the front side of the guide rail frame (1), a first gear (13) and a second gear (14) which are meshed with the rack (12) are installed on the rear wall of the elevator cage (2), the first gear (13) is connected with a driving motor (15), an end cam (16) is coaxially fixed on the second gear (14), a piston cylinder (17) in the left-right direction is fixed on the rear wall of the elevator cage (2), a left piston (18) is installed in the piston cylinder (17), a first pull rope (19) is connected between the right end of the left piston (18) and the left end of a sliding block, a first air inlet hole (20) and a first air outlet hole (21) which are positioned on the right side of the left piston (18) are formed in the side wall of the piston cylinder (17), a plunger pump (22) is installed on the piston cylinder (17), a first check valve (43) is connected between the plunger pump (22) and the air inlet hole, and a vent pipe is installed on the vent pipe, the outer end of a push rod (23) of the plunger pump (22) is contacted with the end face cam (16), the end face cam (16) rotates to drive the plunger pump (22) to pump air into the piston cylinder (17), and the air pumping speed of the plunger pump (22) is less than or equal to the air exhaust speed of the first air exhaust hole (21) when the elevator cage (2) is normally lifted; a vertical upright post (24) with a rectangular cross section is fixed at the position of the front side of the guide rail frame (1) deviated to the left, a rectangular sleeve (25) is fixed on the rear wall of the elevator cage (2), and the rectangular sleeve (25) is sleeved on the upright post (24) and is in clearance fit with the upright post (24); when the elevator has a sudden drop accident, the weight of the elevator cage 2 on two sides of the rectangular sleeve 25 is unbalanced, the right side of the elevator cage 2 can deflect downwards, the right transverse shaft 7 moves downwards along the arc-shaped groove 8, after the elevator cage 2 deflects, the rectangular sleeve 25 can clamp the upper end and the lower end of the rectangular sleeve 25 on the upright post 24 along with the deflection of the elevator cage 2, and under the action of the offset of the elevator cage 2, the rectangular sleeve 25 and the upright post 24 realize self-locking.
2. The construction elevator emergency braking device according to claim 1, the inner wall of the left shell (4) is provided with a radial second blind hole (26), a brake block (27) is arranged in the second blind hole (26), the brake block (27) can slide in the second blind hole (26), a second pressure spring (28) is arranged between the brake block (27) and the bottom of the second blind hole (26), the side wall of the second blind hole (26) is provided with a third blind hole (29) vertical to the side wall, a clamping block (30) capable of sliding in the third blind hole (29) is arranged in the third blind hole, a third pressure spring (31) is arranged between the clamping block (30) and the bottom of the third blind hole (29), and the side wall of the brake block (27) is provided with a clamping groove (32), under the action of a third pressure spring (31), the outer end of the clamping block (30) is clamped into the clamping groove (32); still install a right piston (33) in piston cylinder (17), left piston (18) and right piston (33) are controlled the interval and are arranged, first inlet port (20) and first exhaust hole (21) are located between left piston (18) and right piston (33), be connected with second stay cord (34) between the inner of right piston (33) left end face and fixture block (30), right piston (33) move rightly and can pull out fixture block (30) from draw-in groove (32), brake block (27) outwards pop out and compress tightly pipe (3) under the effect of second pressure spring (28) and carry out the brake speed reduction to left coupling assembling.
3. A construction elevator emergency brake apparatus according to claim 2, wherein the piston cylinder (17) is provided with a stopper protrusion at an inner wall position between the left piston (18) and the right piston (33).
4. The construction elevator emergency braking device according to claim 1, plunger pump (22) including left right direction's plunger (36) jar (35), install a plunger (36) in plunger (36) jar (35), install fourth pressure spring (37) between plunger (36) and plunger (36) jar (35) left end, push rod (23) are fixed at the right-hand member of plunger (36) and push rod (23) right end stretch out plunger (36) jar (35) and are contacted with terminal surface cam (16), the left end of plunger (36) jar (35) is opened has second inlet port (38) and second exhaust hole (39), the breather pipe switches on second exhaust hole (39) and first inlet port (20), second check valve (40) are installed outward to second inlet port (38), plunger (36) right movement accessible second inlet port (38) are breathed in, plunger (36) move the accessible piston cylinder left and pump the gas in breather pipe (17).
5. The construction elevator emergency braking device according to claim 1, wherein each of the housings (4) is formed by two circular arcs, and the two circular arcs are connected by flanges, so that the housings (4) and the pulleys (5) therein can be fastened on the circular tube (3) and then connected by bolts, thereby realizing the mounting and dismounting of the housings (4) on the circular tube (3).
6. The construction elevator emergency braking device according to claim 1, wherein the arc-shaped groove (8) is through in front and at the back, and the rear end of the right cross shaft (7) passes through the arc-shaped groove (8) and is provided with a convex edge (41).
7. A construction elevator emergency braking device according to claim 1, wherein the outer wall of the column (24) and the inner wall of the rectangular sleeve (25) are provided with teeth (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010753590.0A CN111847184B (en) | 2020-07-30 | 2020-07-30 | Construction elevator emergency braking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010753590.0A CN111847184B (en) | 2020-07-30 | 2020-07-30 | Construction elevator emergency braking device |
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| Publication Number | Publication Date |
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| CN111847184A CN111847184A (en) | 2020-10-30 |
| CN111847184B true CN111847184B (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010753590.0A Active CN111847184B (en) | 2020-07-30 | 2020-07-30 | Construction elevator emergency braking device |
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| CN (1) | CN111847184B (en) |
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| AU2005244549A1 (en) * | 2004-12-17 | 2006-07-06 | Inventio Ag | Lift installation with a breaking device, and method for braking and stopping a lift installation |
| CN101318601A (en) * | 2008-07-03 | 2008-12-10 | 中国矿业大学 | Friction drive hoist cable brake and rope clamping device |
| CN101565142A (en) * | 2008-04-21 | 2009-10-28 | 禾利斯脱-惠脱内电梯有限公司 | Elevator car brake with shoes actuated by spring coupled to gear drive |
| CN102071982A (en) * | 2011-02-21 | 2011-05-25 | 山东大学 | Mobile rocker arm shaft type variable valve timing mechanism |
| CN102089232A (en) * | 2008-07-11 | 2011-06-08 | 因温特奥股份公司 | Catch device with an energy accumulator element |
| CN102701037A (en) * | 2012-04-18 | 2012-10-03 | 林智勇 | Elevator safety airbag device |
| BRPI1102914A2 (en) * | 2011-06-20 | 2013-07-16 | Tall Max Indestria Ltda | fall arrest lever |
| CN111319755A (en) * | 2018-12-17 | 2020-06-23 | 波音公司 | Braking system for aircraft and associated method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103879854B (en) * | 2014-03-04 | 2016-06-22 | 浙江迦南科技股份有限公司 | Fall arrest lifting feed device and using method thereof |
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2020
- 2020-07-30 CN CN202010753590.0A patent/CN111847184B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2005244549A1 (en) * | 2004-12-17 | 2006-07-06 | Inventio Ag | Lift installation with a breaking device, and method for braking and stopping a lift installation |
| CN101565142A (en) * | 2008-04-21 | 2009-10-28 | 禾利斯脱-惠脱内电梯有限公司 | Elevator car brake with shoes actuated by spring coupled to gear drive |
| CN101318601A (en) * | 2008-07-03 | 2008-12-10 | 中国矿业大学 | Friction drive hoist cable brake and rope clamping device |
| CN102089232A (en) * | 2008-07-11 | 2011-06-08 | 因温特奥股份公司 | Catch device with an energy accumulator element |
| CN102071982A (en) * | 2011-02-21 | 2011-05-25 | 山东大学 | Mobile rocker arm shaft type variable valve timing mechanism |
| BRPI1102914A2 (en) * | 2011-06-20 | 2013-07-16 | Tall Max Indestria Ltda | fall arrest lever |
| CN102701037A (en) * | 2012-04-18 | 2012-10-03 | 林智勇 | Elevator safety airbag device |
| CN111319755A (en) * | 2018-12-17 | 2020-06-23 | 波音公司 | Braking system for aircraft and associated method |
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| Publication number | Publication date |
|---|---|
| CN111847184A (en) | 2020-10-30 |
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