CN114074872A - Speed limiter rope wheel and speed limiter - Google Patents
Speed limiter rope wheel and speed limiter Download PDFInfo
- Publication number
- CN114074872A CN114074872A CN202010828059.5A CN202010828059A CN114074872A CN 114074872 A CN114074872 A CN 114074872A CN 202010828059 A CN202010828059 A CN 202010828059A CN 114074872 A CN114074872 A CN 114074872A
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- Prior art keywords
- sheave
- ring
- rope
- brake
- inner ring
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- 239000000428 dust Substances 0.000 claims description 5
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 7
- 239000010959 steel Substances 0.000 abstract description 7
- 230000007246 mechanism Effects 0.000 description 10
- 238000009434 installation Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001960 triggered effect 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
- B66B5/044—Mechanical overspeed governors
-
- 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
Abstract
The invention belongs to the technical field of elevator accessories, and particularly relates to a speed limiter rope wheel and a speed limiter. Wherein, overspeed governor rope sheave includes: an inner ring of the rope pulley; the inner diameter of the rope wheel outer ring is matched with the outer diameter of the rope wheel inner ring so as to be sleeved outside the rope wheel inner ring; the brake assembly comprises a brake pad and a mounting piece, wherein the brake pad is mounted on the inner ring of the rope wheel through the mounting piece, the brake pad is in contact fit with the outer ring of the rope wheel through required positive pressure, and the positive pressure can be adjusted through the mounting piece. The speed limiter rope wheel adopts a split type design, and utilizes a brake block to preset traction wheel braking of a lifting force, thereby replacing the traditional mode of generating the lifting force by pressing a steel wire rope or clamping the steel wire rope and dragging.
Description
Technical Field
The invention belongs to the technical field of elevator accessories, and particularly relates to a speed limiter rope wheel and a speed limiter.
Background
The speed limiter is an important guarantee for the safe operation of the elevator. When the elevator runs at an overspeed, the speed limiter triggers the electrical switch and generates mechanical action to drive the safety tongs to brake the car forcibly. At present, rope wheels of the speed limiter are designed in an integrated mode, the lifting force is generated mainly in a mode of pressing a steel wire rope or clamping the steel wire rope and dragging, the fluctuation of the lifting force is large and uncontrollable, and the adjustment is very inconvenient.
Disclosure of Invention
Based on the above-mentioned drawbacks and deficiencies of the prior art, it is an object of the present invention to at least solve one or more of the above-mentioned problems of the prior art, in other words to provide a speed limiter sheave and a speed limiter that meet one or more of the above-mentioned needs.
In order to achieve the purpose, the invention adopts the following technical scheme:
a governor sheave comprising:
an inner ring of the rope pulley;
the inner diameter of the rope wheel outer ring is matched with the outer diameter of the rope wheel inner ring so as to be sleeved outside the rope wheel inner ring;
the brake assembly comprises a brake pad and a mounting piece, wherein the brake pad is mounted on the mounting piece, and the mounting piece is mounted on the inner ring of the rope pulley; the brake block is contacted and matched with the outer ring of the rope wheel at the required positive pressure, and the positive pressure can be adjusted by the mounting piece.
Preferably, the brake pads in the brake assembly are arranged in pairs and are respectively positioned on two sides of the outer ring of the rope wheel.
Preferably, the mounting part comprises two supports, a bolt and a nut, the two supports are fixed on two sides of the inner ring of the rope wheel through the bolt and the nut, and one sides of the two supports, facing the outer ring of the rope wheel, are fixed with the brake pads arranged in pairs respectively.
Preferably, the brake components are arranged in a plurality of groups and are uniformly distributed along the circumferential direction of the outer ring of the rope wheel.
Preferably, a dustproof component is arranged corresponding to the outer ring of the rope pulley and the inner ring of the rope pulley.
Preferably, the dustproof assembly comprises dustproof rings and corresponding fixing pieces, wherein the dustproof rings are respectively positioned on two sides of the inner ring of the rope wheel; the ring width portion of the dustproof ring extends to be attached to the side wall of the rope wheel outer ring.
Preferably, the dust-proof ring is provided with an avoiding hole position of the brake pad.
Preferably, the dust-proof ring comprises a plurality of ring sheets, and the plurality of ring sheets are sequentially arranged in an encircling manner to form an annular structure.
Preferably, the fixing parts are provided with a plurality of numbers, and all the fixing parts and the mounting parts are uniformly distributed along the circumferential direction of the inner ring of the rope pulley.
The invention also provides a speed governor which comprises a base frame and the speed governor rope wheel in any scheme, wherein the inner ring of the rope wheel is installed on the base frame through the rope wheel shaft.
Compared with the prior art, the invention has the beneficial effects that:
the speed governor rope wheel and the speed governor adopt a split type design, a brake block made of composite materials can preset traction wheel braking of lifting force, constant lifting force is provided, and the traditional mode of generating the lifting force by pressing a steel wire rope or clamping the steel wire rope and dragging is replaced.
Drawings
Fig. 1 is a schematic structural view of a speed governor according to embodiment 1 of the present invention;
fig. 2 is a schematic structural view of a base frame of a speed governor in embodiment 1 of the present invention;
fig. 3 is a schematic structural view of an inner ring of a sheave of a speed governor in embodiment 1 of the present invention;
fig. 4 is a schematic structural view of the outer sheave ring of the governor in embodiment 1 of the present invention;
fig. 5 is a schematic radial sectional view of the outer ring of the sheave of the governor in embodiment 1 of the present invention;
fig. 6 is a schematic structural view of a sheave of a speed governor in embodiment 1 of the present invention;
fig. 7 is a schematic structural view of a brake assembly of a speed governor of embodiment 1 of the present invention;
fig. 8 is a schematic structural view of a second side of a sheave of a speed governor of embodiment 1 of the invention (brake assembly not shown);
fig. 9 is a schematic structural view of a second side of a sheave of a speed governor of embodiment 1 of the invention (showing a brake assembly);
fig. 10 is a schematic structural view of a first side of a sheave of a speed governor in embodiment 1 of the invention;
fig. 11 is a schematic structural view of a second side of a sheave of a speed governor of embodiment 1 of the invention;
fig. 12 is a schematic structural view of a brake disc of a speed governor according to embodiment 1 of the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention, the following description will explain the embodiments of the present invention with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
Example 1:
the governor sheave of the present embodiment is applied to a governor.
As shown in fig. 1-12, the speed limiter comprises a base frame 1, a rope wheel shaft 2, a rope wheel 3, a centrifugal throw 4, a centrifugal mechanism, a brake cam assembly, a brake disc 9 and an electric switch 10.
As shown in fig. 2, the base frame 1 includes a bottom plate and two side plates extending vertically along two long sides of the bottom plate, and a mounting space of the sheave is formed between the two side plates. The base plate 1 has an inlet 1a and an outlet 1b for the wire ropes, and has a mounting hole for fixedly mounting the base frame at a corresponding position. In addition, the rope wheel shaft 2 is installed between the two side plates in the width direction parallel to the bottom plate and is positioned at the top of the middle position of the two side plates, so that the rope wheel is suspended in the installation space.
As shown in fig. 3-6, the rope pulley 2 of the present embodiment is a split type design, and includes a rope pulley inner ring 21, a rope pulley outer ring 22 and a brake assembly.
Specifically, rope sheave inner circle 21 includes installation department, stake frame portion and outer fringe portion from inside to outside in proper order, and the installation department passes through deep groove ball bearing and installs on rope pulley shaft 2, and stake frame portion includes four spinal branch poles, along the circumference evenly distributed of installation department, and each spinal branch pole extends along the radial outside of rope sheave, and the outer fringe portion is connected with the extension end of each spinal branch pole respectively. The inner part of the rope wheel inner ring 21 is provided with four vacant positions, wherein two vacant positions are opposite to each other and used for accommodating the centrifugal swinging block 4. In addition, the sheave inner 21 is preferably integrally formed.
The inner diameter of the rope pulley outer ring 22 is matched with the outer diameter of the rope pulley inner ring 21 so as to be conveniently sleeved outside the rope pulley inner ring 21;
as shown in fig. 7, the brake assembly includes a brake pad 23 and a mounting member 24, the brake pad 23 is mounted on the mounting member 24, the mounting member 24 is mounted on the sheave inner ring 21, and the brake pad 23 is in contact engagement with the sheave outer ring 22 at a desired positive pressure to generate a lifting force. Wherein the positive pressure is adjustable by the mounting. Specifically, the brake pads 23 of the brake assembly are arranged in pairs and are respectively positioned on both sides of the sheave outer ring 22 so as to provide a constant positive pressure and thus a constant lifting force. The mounting piece comprises two support seats 24a, a bolt 24b and a nut 24c, the two support seats 24a are fixed at the extending ends of the two support rods on the two sides of the inner ring 21 of the rope wheel through the bolt 24b and the nut 24c, and one sides of the two support seats 24a facing the outer ring of the rope wheel are respectively fixed with the brake pads 23 arranged in pairs, so that the two side walls of the outer ring of the rope wheel are clamped by the brake pads arranged in pairs to provide constant positive pressure. The brake components of the embodiment are provided with two groups, and are symmetrically arranged on two sides of the rope wheel inner ring 21, so that the brake components are uniformly distributed along the circumferential direction of the rope wheel outer ring 22. It should be noted that the number of the brake assemblies is not limited to two sets in this embodiment, and can be freely adjusted according to actual requirements.
In addition, the sheave outer ring 22 and the sheave inner ring 21 of the present embodiment are provided with a dust-proof member. Specifically, as shown in fig. 6, 8 and 9, the dustproof assembly includes dustproof rings 25 respectively installed on two sides of the sheave inner ring and corresponding fixing members 26, the fixing members 26 fix the dustproof rings to the sheave inner ring, and the ring width portions of the dustproof rings 25 extend to be attached to the side wall of the sheave outer ring, so as to achieve the dustproof between the sheave outer ring 22 and the sheave inner ring 21. Wherein, the dust ring 25 has an avoiding hole position 250 of the brake pad.
The dust ring of the present embodiment includes a plurality of ring pieces 25a, for example, the number of the ring pieces of the present embodiment is four, but not limited to four; the four ring pieces are taken as an example for explanation, the four ring pieces are sequentially arranged in a surrounding mode to form an annular structure, and the avoidance hole position is located at the corresponding connection position of the adjacent ring pieces. Any side of rope sheave inner circle of this embodiment corresponds has two mounting 26, and in addition, brake assembly has two sets ofly, and its support 24a is corresponding also has two, utilizes two mountings 26 and two supports 24a to fix spacingly four adjacent positions of four rings piece to realize the dustproof of rope sheave inner circle 21 and rope sheave outer lane 22, avoid the foreign matter to get into the handing-over department of rope sheave inner circle 21 and rope sheave outer lane 22. Wherein, the fixing piece of the dustproof assembly and the support of the brake assembly are uniformly distributed along the circumferential direction of the inner ring of the rope wheel, so that the stress uniformity of the whole structure is ensured.
As shown in fig. 10, the sheave 2 of this embodiment is symmetrically provided with centrifugal throwers 4, specifically, two centrifugal throwers are respectively located at two opposite vacant positions inside the inner sheave ring 21. Centrifugal mechanisms which are in one-to-one correspondence with the centrifugal throwing blocks 4 are symmetrically arranged on the first side of the two sides of the rope wheel 2, and the two centrifugal mechanisms are linked through a connecting rod 51. Specifically, the centrifugal mechanism comprises a centrifugal swing rod 5 and a fulcrum shaft 50, and the fulcrum shaft 50 is arranged at the extension ends of the other two support rods of the inner ring of the rope pulley; the centrifugal swing rod 5 comprises a first support arm 5a and a second support arm 5b extending from the first support arm 5a, an included angle between the first support arm 5a and the second support arm 5b is an obtuse angle, the length of the first support arm 5a is smaller than that of the second support arm 5b, the end part of the first support arm 51 is connected with the centrifugal swinging block 4, and the middle part of the second support arm 5b is rotatably installed on the fulcrum shaft 50. In addition, two ends of the connecting rod 51 are respectively connected with the two centrifugal swing rods 5, and the connecting rod 51 is located on the same side of the plane where the two fulcrum shafts are located, so that the two centrifugal mechanisms can realize centrifugal linkage.
Wherein, at least one centrifugal swing rod is correspondingly provided with a centrifugal reset mechanism. In this embodiment, a centrifugal swing rod is provided with a centrifugal reset mechanism as an example for detailed description. Specifically, as shown in fig. 10, the centrifugal return mechanism includes a centrifugal spring 52, a centrifugal spring spindle 53 and a spindle sleeve 54, and the centrifugal spring 52 and the spindle sleeve 54 are sequentially sleeved outside the centrifugal spring spindle 53; one end of the centrifugal spring mandrel 53 is fixed on the inner ring 21 of the rope pulley, and the other end is movably matched in the mandrel sleeve 54; one end of the core shaft sleeve 54 is abutted against the centrifugal spring 52, and the other end is connected with one side of the second support arm of the centrifugal swing rod 5 far away from the centrifugal flail. When the centrifugal throwing block 4 is thrown outwards in an overspeed state, the centrifugal throwing block 4 is linked with the centrifugal swing rod 5, the centrifugal swing rod 5 is linked with the core shaft sleeve 54, and the core shaft sleeve 54 compresses the centrifugal spring 52; after the speed limiter is reset, the centrifugal swing rod 5 is reset under the restoring force of the centrifugal spring 52.
As shown in fig. 11, the centrifugal throw block 4 of the present embodiment is further connected to the end of the fulcrum shaft 50 on the second side of the two sides of the sheave through a connecting plate 40, and the connecting plate 40 is rotatably fitted to the fulcrum shaft 50 to realize fulcrum positioning of the centrifugal throw block.
The brake disc 9 and two brake cam assemblies of this embodiment all are located the second side in rope sheave both sides, and wherein, brake disc 9 installs on rope sheave axle 2 through oilless bearing, and two brake cam assemblies symmetric distribution are in the radial both sides of brake disc, and with centrifugal flail 4 one-to-one.
Specifically, as shown in fig. 11, the brake cam assembly includes a brake cam 6 and a lifting rod 60, and the brake cam 60 is rotatably mounted to the sheave 2, specifically, the fulcrum shaft 50 rotatably mounted to the inner ring of the sheave. One end of the lifting rod 60 is rotatably arranged on the brake cam 6, the other end of the lifting rod is rotatably arranged on the centrifugal throw block 4, and the rotating installation mode can adopt a rotating pair connection.
In addition, as shown in fig. 12, the peripheral wall of the brake disk 9 of the present embodiment has knurling 9a so as to raise the frictional force between the brake cam 6 and the brake disk 9. Further, as shown in fig. 11, the contact surface of the brake cam 6 and the brake disk 9 of the present embodiment has a stopper protrusion 6a to prevent the brake cam 6 from rotating excessively.
As shown in fig. 12, the brake disc 9 of the present embodiment is provided with a trip plate 90 for triggering the electric switch 10 of the speed governor. Wherein, still be equipped with spacing axle 91 on the brake disc 9, correspondingly, the curb plate that corresponds the brake disc on the bed frame 1 has the spacing movable groove 1c that corresponds to spacing axle, and spacing axle needs to satisfy switch clapper 90 at the stroke in spacing movable groove 1c and can trigger the electrical switch 10 of overspeed governor, and when speeding promptly, the brake disc rotates, and spacing axle is followed the spacing movable groove activity and is triggered the electrical switch of overspeed governor to switch clapper to spacing extreme position in spacing movable groove. In addition, a reset mechanism for resetting the limiting shaft 91 is installed on the side plate of the base frame 1 corresponding to the brake disc, the reset mechanism comprises a spring 92 and a connecting piece 93, the connecting piece 93 is fixedly installed on one side far away from the moving direction of the limiting shaft, one end of the spring 92 is connected with the connecting piece 93, and the other end of the spring is connected with the limiting shaft 91. When the limiting shaft moves along the limiting movable groove 1c, the spring 92 is stretched; when the governor is reset, the limit shaft is reset by the restoring force of the spring 92. The connecting member 93 may be a fixing member such as a bolt or a screw.
The overspeed governor of this embodiment still includes the electro-magnet, and the electro-magnet is installed in bed frame 1 for remote triggering and reset the overspeed governor, the prior art can be referred to the concrete structure of electro-magnet, and it is not repeated here.
The operating principle of the speed limiter of this embodiment is as follows:
when the brake disc is overspeed, the centrifugal swing block is linked with the corresponding lifting rod, the lifting rod is linked with the corresponding brake cam to rotate, so that the brake cam rotates to be in brake fit with the brake disc, and the rotating directions of the two brake cams are opposite; the outer ring of the rope wheel is stopped through positive pressure between the outer ring of the rope wheel and the brake pad, and constant lifting force is provided for the steel wire rope.
Example 2:
the speed governor of the present embodiment is different from embodiment 1 in that:
centrifugal canceling release mechanical system and be used for the canceling release mechanical system that spacing axle resets can also adopt other canceling release mechanical systems among the prior art, realize the structure diversification of overspeed governor, satisfy the demand of different application occasions.
Other structures can refer to embodiment 1.
The foregoing has outlined rather broadly the preferred embodiments and principles of the present invention and it will be appreciated that those skilled in the art may devise variations of the present invention that are within the spirit and scope of the appended claims.
Claims (10)
1. A speed governor sheave, comprising:
an inner ring of the rope pulley;
the inner diameter of the rope wheel outer ring is matched with the outer diameter of the rope wheel inner ring so as to be sleeved outside the rope wheel inner ring;
the brake assembly comprises a brake pad and a mounting piece, wherein the brake pad is mounted on the mounting piece, and the mounting piece is mounted on the inner ring of the rope pulley; the brake block is contacted and matched with the outer ring of the rope wheel at the required positive pressure, and the positive pressure can be adjusted by the mounting piece.
2. The governor sheave of claim 1, wherein the brake pads in the brake assembly are arranged in pairs on opposite sides of an outer race of the sheave.
3. The speed governor rope pulley according to claim 2, wherein the mounting member comprises two support blocks, a bolt and a nut, the two support blocks are fixed to two sides of the inner ring of the rope pulley through the bolt and the nut, and one sides of the two support blocks facing the outer ring of the rope pulley are respectively fixed to the brake pads arranged in pairs.
4. The governor sheave of claim 1, wherein the brake assemblies are arranged in a plurality of groups evenly distributed around the outer circumference of the sheave.
5. The governor sheave of any one of claims 1-4, wherein dust protection components are provided corresponding to an outer sheave ring and an inner sheave ring.
6. The governor sheave of claim 5, wherein the dust-proof assembly comprises dust-proof rings on either side of the sheave inner ring and corresponding fasteners securing the dust-proof rings to the sheave inner ring; the ring width portion of the dustproof ring extends to be attached to the side wall of the rope wheel outer ring.
7. The governor sheave of claim 6, wherein the dust collar has an escape aperture for a brake pad.
8. The governor sheave of claim 6, wherein the dust ring comprises a plurality of ring segments that are sequentially encircled to form an annular structure.
9. The governor sheave of claim 6, wherein the plurality of fixed members includes a plurality of fixed members and the plurality of mounting members are evenly distributed about the inner circumference of the sheave.
10. A speed limiter comprising a base frame, characterized by a speed limiter sheave as claimed in any one of claims 1-9, the inner ring of the sheave being mounted to the base frame by a sheave shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010828059.5A CN114074872B (en) | 2020-08-17 | 2020-08-17 | Speed limiter rope sheave and speed limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010828059.5A CN114074872B (en) | 2020-08-17 | 2020-08-17 | Speed limiter rope sheave and speed limiter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114074872A true CN114074872A (en) | 2022-02-22 |
| CN114074872B CN114074872B (en) | 2024-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010828059.5A Active CN114074872B (en) | 2020-08-17 | 2020-08-17 | Speed limiter rope sheave and speed limiter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114074872B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012250826A (en) * | 2011-06-06 | 2012-12-20 | Mitsubishi Electric Building Techno Service Co Ltd | Elevator speed adjuster |
| CN105060058A (en) * | 2015-07-23 | 2015-11-18 | 杭州沪宁电梯配件有限公司 | Constant force speed governor |
| CN209143433U (en) * | 2018-03-15 | 2019-07-23 | 杭州沪宁电梯部件股份有限公司 | Rope sheave governor trigger mechanism |
| CN209411543U (en) * | 2018-03-15 | 2019-09-20 | 杭州沪宁电梯部件股份有限公司 | A kind of rope sheave mechanism of limiter of speed |
| CN110329872A (en) * | 2019-08-09 | 2019-10-15 | 石家庄通安机械有限公司 | Centrifugal elevator governor |
| CN210048315U (en) * | 2019-04-10 | 2020-02-11 | 德阳市重装检测有限责任公司 | Accurate measuring device for elevator speed limiter |
| CN210505138U (en) * | 2019-08-09 | 2020-05-12 | 石家庄通安机械有限公司 | Centrifugal elevator speed limiter |
| CN213112095U (en) * | 2020-08-17 | 2021-05-04 | 杭州沪宁电梯部件股份有限公司 | Speed limiter rope wheel and speed limiter |
-
2020
- 2020-08-17 CN CN202010828059.5A patent/CN114074872B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012250826A (en) * | 2011-06-06 | 2012-12-20 | Mitsubishi Electric Building Techno Service Co Ltd | Elevator speed adjuster |
| CN105060058A (en) * | 2015-07-23 | 2015-11-18 | 杭州沪宁电梯配件有限公司 | Constant force speed governor |
| CN209143433U (en) * | 2018-03-15 | 2019-07-23 | 杭州沪宁电梯部件股份有限公司 | Rope sheave governor trigger mechanism |
| CN209411543U (en) * | 2018-03-15 | 2019-09-20 | 杭州沪宁电梯部件股份有限公司 | A kind of rope sheave mechanism of limiter of speed |
| CN210048315U (en) * | 2019-04-10 | 2020-02-11 | 德阳市重装检测有限责任公司 | Accurate measuring device for elevator speed limiter |
| CN110329872A (en) * | 2019-08-09 | 2019-10-15 | 石家庄通安机械有限公司 | Centrifugal elevator governor |
| CN210505138U (en) * | 2019-08-09 | 2020-05-12 | 石家庄通安机械有限公司 | Centrifugal elevator speed limiter |
| CN213112095U (en) * | 2020-08-17 | 2021-05-04 | 杭州沪宁电梯部件股份有限公司 | Speed limiter rope wheel and speed limiter |
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| Publication number | Publication date |
|---|---|
| CN114074872B (en) | 2024-05-07 |
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