CN111196539A - Power generation type speed limiter - Google Patents
Power generation type speed limiter Download PDFInfo
- Publication number
- CN111196539A CN111196539A CN201910770251.0A CN201910770251A CN111196539A CN 111196539 A CN111196539 A CN 111196539A CN 201910770251 A CN201910770251 A CN 201910770251A CN 111196539 A CN111196539 A CN 111196539A
- Authority
- CN
- China
- Prior art keywords
- pulley
- arc
- speed limiter
- rod
- steel wire
- 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.)
- Pending
Links
- 238000010248 power generation Methods 0.000 title abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 38
- 239000010959 steel Substances 0.000 claims abstract description 38
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
- B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
- B66B5/06—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed electrical
Landscapes
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention discloses a power generation type speed limiter which comprises a speed limiter support, wherein the bottom of the speed limiter support is in threaded connection with a fixing bolt, the top of the speed limiter support is provided with a pulley device, the bottom surface of the speed limiter support is movably connected with a clamping block device corresponding to the top of the pulley device, one side of the top of the speed limiter support corresponding to the pulley device is provided with a motor device, and the back of the top of the speed limiter support corresponding to the pulley device is provided with an electric control lock tongue device. According to the invention, different upper speed limits can be set according to different elevators through microcomputer equipment, the applicability of the speed limiter is improved, the arc-shaped clamping block is pulled by the lock tongue wheel to control the steel wire pulley and the steel wire rope, the internal mechanical structure is simple, the execution degree is high, the operation of the speed limiter is stable, and the safety of the elevators is improved.
Description
Technical Field
The invention belongs to the technical field of elevator safety, and particularly relates to a power generation type speed limiter.
Background
The elevator speed limiter is one of safety control components in an elevator safety protection system, and when the elevator in operation causes the car to overspeed and even to fall due to any reason and all other safety protection devices do not work, the speed limiter and the safety tongs perform linkage action to stop the elevator car;
the straight-running elevator speed limiter in the prior art is a safety part for preventing the elevator from running at an overspeed, generally only can control a highest upper linear speed, elevators with different speeds need to customize speed-matched speed limiters independently, the universality is poor, a complex mechanical structure is arranged in the speed limiter, most of the speed limiters are made by utilizing the principle of centrifugal acting force, the execution degree is low, the manufacturing process is complex, and the manufacturing cost is high.
Disclosure of Invention
The invention aims to solve the problems in the background art and provides a power generation type speed limiter.
The technical scheme adopted by the invention is as follows:
the power generation type speed limiter comprises a speed limiter support, wherein a fixing bolt is connected to the bottom of the speed limiter support through threads, a pulley device is arranged at the top of the speed limiter support, a clamping block device is movably connected to the top, corresponding to the pulley device, of the bottom surface of the speed limiter support, a motor device is arranged on one side, corresponding to the pulley device, of the top of the speed limiter support, and an electric control spring bolt device is arranged on the back, corresponding to the pulley device, of the top of the speed limiter support.
The pulley device comprises a steel wire pulley, a steel wire rope is nested on the side face of the steel wire pulley, a ratchet wheel is fixedly connected to the back face of the steel wire pulley, the steel wire pulley is fixed to the top of a speed limiter support through a rotating shaft, a rope hole is formed in the position, corresponding to the steel wire rope, of the bottom face of the speed limiter support, and the opening area of the rope hole is larger than the sectional area of the steel wire rope.
The clamping block device comprises a first arc-shaped rod, a first connecting rod is movably connected to the top end of the first arc-shaped rod, a second connecting rod is movably connected to one end, away from the first arc-shaped rod, of the first connecting rod, a second arc-shaped rod is movably connected to one end, away from the first connecting rod, of the second connecting rod, arc-shaped clamping blocks are arranged on the inner sides of the first arc-shaped rod and the second arc-shaped rod, and springs are movably connected to the tops of the first arc-shaped rod and the second arc-shaped rod.
The motor device comprises a generator, the side face of the generator is connected with a wire, one end, far away from the generator, of the wire is connected with a voltage conversion device, a first belt pulley is nested in a rotating shaft of the generator, a transmission belt is nested in the side face of the first belt pulley, and a second belt pulley is embedded in one end, far away from the first belt pulley, of the transmission belt.
Wherein, automatically controlled spring bolt device includes the spring bolt wheel, the side fixedly connected with spring bolt box of spring bolt wheel, the inside of spring bolt box is equipped with the electromagnetic rod, one side of electromagnetic rod is equipped with the rotation axis, the side nestification of rotation axis has the activity spring bolt, one side that the activity spring bolt corresponds the electromagnetic rod is equipped with the permanent magnet, the positive threaded connection of spring bolt wheel has connecting bolt.
The second belt pulley and the steel wire pulley are nested on the same rotating shaft, the transmission ratio of the first belt pulley to the second belt pulley is 1:1, and the wire is electrically connected with a rotating coil in the generator.
The first connecting rod and the second connecting rod are fixed on the front surface of the spring bolt wheel through connecting bolts, and the spring bolt wheel is nested on a rotating shaft of the steel wire pulley through a bearing.
The voltage conversion device is electrically connected with the microcomputer equipment, and the electromagnetic rod is electrically connected with the microcomputer equipment.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. in the invention, the arranged generator can obtain the rotating speed of the steel wire pulley, the voltage conversion device can transmit the electric signal of the generator to the microcomputer equipment, the microcomputer equipment calculates the speed of the steel wire pulley, the microcomputer equipment can be used for setting the upper speed limit of the steel wire pulley, after the speed of the steel wire pulley reaches the upper speed limit, the microcomputer equipment can be used for controlling the magnetic force direction of the electromagnetic rod and turning off the electric brake of the elevator to ensure the stable stop of the elevator, and the microcomputer equipment can be used for setting different upper speed limits according to different elevators, thereby improving the applicability of the speed limiter.
2. According to the elevator speed limiter, the arc-shaped clamping blocks are pulled by the lock tongue wheel to control the steel wire pulleys and the steel wire rope, the internal mechanical structure is simple, the execution degree is high, the speed limiter runs stably, and the safety of the elevator is improved.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a rear view of the present invention;
FIG. 3 is a schematic view of the construction of the pulley apparatus of the present invention;
FIG. 4 is a schematic structural view of a clamping block device according to the present invention;
FIG. 5 is a schematic structural view of a motor apparatus according to the present invention;
fig. 6 is a schematic structural view of the electric control deadbolt assembly of the present invention.
The labels in the figure are: 1. a governor bracket; 2. fixing the bolt; 3. a pulley device; 31. a steel wire pulley; 32. a ratchet wheel; 33. a wire rope; 4. a clamping block device; 41. a first arcuate bar; 42. a first link; 43. a second arcuate bar; 44. a second link; 45. an arc-shaped clamping block; 46. a spring; 5. a motor device; 51. a generator; 52. a wire; 53. a voltage conversion device; 54. a first pulley; 55. a drive belt; 56. a second pulley; 6. an electrically controlled deadbolt assembly; 61. a latch bolt wheel; 62. a lock tongue box; 63. an electromagnetic bar; 64. a rotating shaft; 65. a movable bolt; 66. and connecting the bolts.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1-6, an electricity generation type speed limiter comprises a speed limiter support 1, wherein a fixing bolt 2 is connected to the bottom of the speed limiter support 1 through a thread, a pulley device 3 is arranged at the top of the speed limiter support 1, a clamping block device 4 is movably connected to the bottom of the speed limiter support 1 corresponding to the top of the pulley device 3, a motor device 5 is arranged on one side of the top of the speed limiter support 1 corresponding to the pulley device 3, an electric control spring bolt device 6 is arranged on the back of the top of the speed limiter support 1 corresponding to the pulley device 3, a steel wire pulley 31 of the pulley device 3 is embedded in the side of the steel wire pulley 31, a ratchet wheel 32 is fixedly connected to the back of the steel wire pulley 31, the steel wire pulley 31 is fixed to the top of the speed limiter support 1 through a rotating shaft, a rope hole is formed in the position of.
By adopting the technical scheme:
The clamping block device 4 comprises a first arc-shaped rod 41, a first connecting rod 42 is movably connected to the top end of the first arc-shaped rod 41, a second connecting rod 44 is movably connected to one end, away from the first arc-shaped rod 41, of the first connecting rod 42, a second arc-shaped rod 43 is movably connected to one end, away from the first connecting rod 42, of the second connecting rod 44, an arc-shaped clamping block 45 is arranged on the inner sides of the first arc-shaped rod 41 and the second arc-shaped rod 43, and a spring 46 is movably connected to the tops of the first arc-shaped rod 41 and the second arc-shaped rod 43.
By adopting the technical scheme:
the triangle-shaped stable structure that spring 46, first connecting rod 42 and second connecting rod 44 are constituteed can guarantee that first arc pole 41 and second arc pole 43 can not influence the normal rotation of wire rope pulley 31, and when arc clamp splice 45 extruded wire rope 33, the area of contact with wire rope 33 has been increased in the design of arc clamp splice 45, has increased the frictional force between arc clamp splice 45 and the wire rope 33 promptly, guarantees that clamp splice device 4 moves more effectively.
The motor device 5 comprises a generator 51, a lead 52 is connected to the side surface of the generator 51, a voltage conversion device 53 is connected to one end, far away from the generator 51, of the lead 52, a first belt pulley 54 is nested on a rotating shaft of the generator 51, a transmission belt 55 is nested on the side surface of the first belt pulley 54, a second belt pulley 56 is nested on one end, far away from the first belt pulley 54, of the transmission belt 55, the second belt pulley 56 and the steel wire pulley 31 are nested on the same rotating shaft, the transmission ratio of the first belt pulley 54 to the second belt pulley 56 is 1:1, and the lead 52 is electrically connected with a rotating coil inside the generator 51.
By adopting the technical scheme:
when the steel wire pulley 31 rotates, the second belt pulley 56 can be driven to rotate through the rotating shaft, the second belt pulley 56 can drive the first belt pulley 54 to rotate through the transmission belt 55, the first belt pulley 54 drives the inner coil of the generator 51 to rotate, the generator 51 generates voltage, a voltage signal is transmitted to the voltage conversion device 53 through the lead 52, the rotating speed of the steel wire pulley 31 can be calculated through the voltage generated by the generator 51, and the rotating speed of the steel wire pulley 31 can be monitored.
The electric control bolt device 6 comprises a bolt wheel 61, a bolt box 62 is fixedly connected to the side surface of the bolt wheel 61, an electromagnetic rod 63 is arranged inside the bolt box 62, a rotating shaft 64 is arranged on one side of the electromagnetic rod 63, a movable bolt 65 is nested on the side surface of the rotating shaft 64, a permanent magnet is arranged on one side, corresponding to the electromagnetic rod 63, of the movable bolt 65, a connecting bolt 66 is connected to the front surface of the bolt wheel 61 in a threaded manner, the first connecting rod 42 and the second connecting rod 44 are fixed to the front surface of the bolt wheel 61 through the connecting bolt 66, and the bolt wheel 61 is nested on a rotating shaft of the steel wire pulley.
By adopting the technical scheme:
magnetic force can be produced to electromagnetic rod 63 after the circular telegram, when the magnetic force that electromagnetic rod 63 produced is opposite with the magnetic pole of the last permanent magnet of movable bolt 65, movable bolt 65 can be inhaled in the inner chamber of spring bolt box 62 to movable electromagnetic rod 63, when the magnetic force that electromagnetic rod 63 produced is the same with the magnetic pole of the last permanent magnet of movable bolt 65, electromagnetic rod 63 can release movable bolt 65 and lock bolt box 62, movable bolt 65 can block pivoted ratchet 32 this moment, make ratchet 32 drive latch bolt wheel 61 synchronous rotation, pivoted latch bolt wheel 61 can pass through first connecting rod 42 pulling first arc pole 41 or through second connecting rod 44 pulling second arc pole 43, make arc clamp 45 extrude on wire rope 33, make wire rope 33 stop sliding, thereby guarantee that the safety tongs can normally start.
The voltage conversion device 53 is electrically connected to the microcomputer device, and the electromagnetic rod 63 is electrically connected to the microcomputer device.
By adopting the technical scheme:
the voltage conversion device 53 can transmit the electric signal of the generator 51 to the microcomputer device, the microcomputer device calculates the speed of the steel wire pulley 31, the microcomputer device can set the upper speed limit of the steel wire pulley 31, and after the speed of the steel wire pulley 31 reaches the upper speed limit, the microcomputer device can control the magnetic force direction of the electromagnetic rod 63 and turn off the elevator electric brake, so that the elevator can be stably stopped.
Referring to fig. 1-6, when the elevator is running, the wire pulley 31 drives the second pulley 56 to rotate through the rotating shaft, the second pulley 56 drives the first pulley 54 to rotate through the transmission belt 55, the first pulley 54 drives the internal coil of the generator 51 to rotate, so that the generator 51 generates voltage and transmits the voltage signal to the voltage conversion device 53 through the wire 52, the voltage conversion device 53 can transmit the electric signal of the generator 51 to the microcomputer device, the microcomputer device calculates the speed of the wire pulley 31, when the wire pulley 31 reaches the set upper speed limit, the microcomputer device changes the magnetic direction of the electromagnetic rod 63, the electromagnetic rod 63 can push the movable latch tongue 65 out of the latch tongue box 62, at this time, the movable latch tongue 65 can block the rotating ratchet wheel 32, so that the ratchet wheel 32 drives the latch tongue wheel 61 to rotate synchronously, the rotating latch tongue 61 can pull the first arc-shaped rod 41 through the first connecting rod 42 or pull the second arc-shaped rod 43 through the second connecting rod 44, the arc-shaped clamping blocks 45 are extruded on the steel wire rope 33, so that the steel wire rope 33 stops sliding, and the safety tongs can be normally started to stop the elevator.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. Electricity generation formula overspeed governor, including overspeed governor support (1), its characterized in that: the bottom threaded connection of overspeed governor support (1) has fixing bolt (2), the top of overspeed governor support (1) is equipped with pulley device (3), the top swing joint that the bottom surface of overspeed governor support (1) corresponds pulley device (3) has clamp splice device (4), one side that the top of overspeed governor support (1) corresponds pulley device (3) is equipped with motor device (5), the back that the top of overspeed governor support (1) corresponds pulley device (3) is equipped with automatically controlled spring bolt device (6).
2. A power generating governor as defined in claim 1, wherein: pulley gear (3) steel wire pulley (31), wire rope (33) have been nested to the side of steel wire pulley (31), the back fixedly connected with ratchet (32) of steel wire pulley (31), the top at overspeed governor support (1) is fixed through the pivot in steel wire pulley (31), the rope hole has been seted up to the position that the bottom surface of overspeed governor support (1) corresponds wire rope (33), and the open area in rope hole is greater than the sectional area of wire rope (33).
3. A power generating governor as defined in claim 1, wherein: the clamp splice device (4) comprises a first arc-shaped rod (41), the top end of the first arc-shaped rod (41) is movably connected with a first connecting rod (42), one end of the first connecting rod (42) far away from the first arc-shaped rod (41) is movably connected with a second connecting rod (44), one end of the second connecting rod (44) far away from the first connecting rod (42) is movably connected with a second arc-shaped rod (43), the inner sides of the first arc-shaped rod (41) and the second arc-shaped rod (43) are provided with arc-shaped clamp splices (45), and the top portions of the first arc-shaped rod (41) and the second arc-shaped rod (43) are movably connected with springs (46).
4. A power generating governor as defined in claim 1, wherein: the motor device (5) comprises a generator (51), a lead (52) is connected to the side face of the generator (51), one end, far away from the generator (51), of the lead (52) is connected with a voltage conversion device (53), a first belt pulley (54) is nested in the rotating shaft of the generator (51), a transmission belt (55) is nested in the side face of the first belt pulley (54), and a second belt pulley (56) is embedded in one end, far away from the first belt pulley (54), of the transmission belt (55).
5. A power generating governor as defined in claim 1, wherein: automatically controlled spring bolt device (6) are including spring bolt wheel (61), side fixedly connected with spring bolt box (62) of spring bolt wheel (61), the inside of spring bolt box (62) is equipped with electromagnetic rod (63), one side of electromagnetic rod (63) is equipped with rotation axis (64), the side nestification of rotation axis (64) has movable spring bolt (65), one side that movable spring bolt (65) correspond electromagnetic rod (63) is equipped with the permanent magnet, the positive threaded connection of spring bolt wheel (61) has connecting bolt (66).
6. A power generating speed limiter in accordance with claim 2 or 4, wherein: the second belt pulley (56) and the steel wire pulley (31) are nested on the same rotating shaft, the transmission ratio of the first belt pulley (54) to the second belt pulley (56) is 1:1, and the lead (52) is electrically connected with a rotating coil in the generator (51).
7. A power generating speed limiter in accordance with claim 2, 3 or 6 wherein: the first connecting rod (42) and the second connecting rod (44) are fixed on the front surface of the bolt wheel (61) through connecting bolts (66), and the bolt wheel (61) is nested on a rotating shaft of the steel wire pulley (31) through a bearing.
8. A power generating speed limiter in accordance with any one of claims 1 to 5, wherein: the voltage conversion device (53) is electrically connected with the microcomputer equipment, and the electromagnetic rod (63) is electrically connected with the microcomputer equipment.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201910770251.0A CN111196539A (en) | 2019-08-20 | 2019-08-20 | Power generation type speed limiter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201910770251.0A CN111196539A (en) | 2019-08-20 | 2019-08-20 | Power generation type speed limiter |
Publications (1)
Publication Number | Publication Date |
---|---|
CN111196539A true CN111196539A (en) | 2020-05-26 |
Family
ID=70741627
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201910770251.0A Pending CN111196539A (en) | 2019-08-20 | 2019-08-20 | Power generation type speed limiter |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN111196539A (en) |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2129702Y (en) * | 1991-10-23 | 1993-04-14 | 上海市公共交通总公司 | Locking rope box for electromagnetic ratchet of trolley bus |
JP2001122549A (en) * | 1999-10-25 | 2001-05-08 | Hitachi Ltd | Governor for elevator |
JP2005145702A (en) * | 2003-11-19 | 2005-06-09 | Toshiba Elevator Co Ltd | Elevator |
CN201280378Y (en) * | 2008-05-13 | 2009-07-29 | 惠公 | Power-generation descending arm rest lift |
CN101532544A (en) * | 2009-04-20 | 2009-09-16 | 北京升华电梯集团有限公司 | Braking brake |
CN104071672A (en) * | 2014-06-20 | 2014-10-01 | 长沙环康环保科技有限公司 | Elevator emergency inductive speed-limiting device |
CN104609276A (en) * | 2015-02-03 | 2015-05-13 | 合肥工业大学 | Elevator speed limiter and control method thereof |
CN205061234U (en) * | 2015-10-21 | 2016-03-02 | 刘德民 | Two -way overspeed governor with unexpected function that removes of monitoring elevator car |
CN207330027U (en) * | 2017-08-29 | 2018-05-08 | 浙江屹立电梯有限公司 | A kind of elevator Double-speed limit device |
CN207330029U (en) * | 2017-09-01 | 2018-05-08 | 杭州职业技术学院 | A kind of elevator load test device |
CN211393447U (en) * | 2019-08-20 | 2020-09-01 | 北京升华电梯集团有限公司 | Power generation type speed limiter |
-
2019
- 2019-08-20 CN CN201910770251.0A patent/CN111196539A/en active Pending
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2129702Y (en) * | 1991-10-23 | 1993-04-14 | 上海市公共交通总公司 | Locking rope box for electromagnetic ratchet of trolley bus |
JP2001122549A (en) * | 1999-10-25 | 2001-05-08 | Hitachi Ltd | Governor for elevator |
JP2005145702A (en) * | 2003-11-19 | 2005-06-09 | Toshiba Elevator Co Ltd | Elevator |
CN201280378Y (en) * | 2008-05-13 | 2009-07-29 | 惠公 | Power-generation descending arm rest lift |
CN101532544A (en) * | 2009-04-20 | 2009-09-16 | 北京升华电梯集团有限公司 | Braking brake |
CN104071672A (en) * | 2014-06-20 | 2014-10-01 | 长沙环康环保科技有限公司 | Elevator emergency inductive speed-limiting device |
CN104609276A (en) * | 2015-02-03 | 2015-05-13 | 合肥工业大学 | Elevator speed limiter and control method thereof |
CN205061234U (en) * | 2015-10-21 | 2016-03-02 | 刘德民 | Two -way overspeed governor with unexpected function that removes of monitoring elevator car |
CN207330027U (en) * | 2017-08-29 | 2018-05-08 | 浙江屹立电梯有限公司 | A kind of elevator Double-speed limit device |
CN207330029U (en) * | 2017-09-01 | 2018-05-08 | 杭州职业技术学院 | A kind of elevator load test device |
CN211393447U (en) * | 2019-08-20 | 2020-09-01 | 北京升华电梯集团有限公司 | Power generation type speed limiter |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN106144826B (en) | A kind of control method of elevator governor | |
CN211393447U (en) | Power generation type speed limiter | |
CN104401836A (en) | Speed limiter for triggering elevator safe execution mechanism or device | |
CN211169391U (en) | Car following type speed limiter | |
CN111196539A (en) | Power generation type speed limiter | |
CN203007869U (en) | Electromagnetic braking automatic control positioning rotary swinging mechanism | |
CN105752790B (en) | A kind of elevator governor | |
CN204508522U (en) | A kind of elevator system of tower cylinder gear-rack type lifter | |
CN105293245A (en) | Winding drum type elevator anti-falling device | |
CN110329872A (en) | Centrifugal elevator governor | |
CN201925094U (en) | Automatic safety control system of medium-small wind power generator | |
CN101871338A (en) | Direct drive pumping unit | |
CN209535032U (en) | A kind of auxiliary braking speed limiting system | |
CN109516335B (en) | No computer lab overspeed governor | |
CN216105781U (en) | Novel constant speed brake | |
CN211335933U (en) | Mechanism for driving brake pedal to automatically rotate through linear traction and automobile | |
CN210193275U (en) | Stroke limiting device | |
CN111377329A (en) | Centrifugal trigger mechanism for high-speed elevator speed limiter | |
CN209344642U (en) | Automatic overhead line system | |
CN203392684U (en) | Novel stretching device | |
CN207774530U (en) | A kind of explosion-proof limiter of speed | |
CN201777757U (en) | Brushless DC driving device for elevator | |
CN213265294U (en) | Door opening and closing mechanism for elevator | |
CN2916865Y (en) | Active cable releaser of cable winch | |
CN216945743U (en) | Elevator overspeed protection device |
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 |