CN111204634A - Elevator buffer that security performance is high - Google Patents
Elevator buffer that security performance is high Download PDFInfo
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- CN111204634A CN111204634A CN202010156458.1A CN202010156458A CN111204634A CN 111204634 A CN111204634 A CN 111204634A CN 202010156458 A CN202010156458 A CN 202010156458A CN 111204634 A CN111204634 A CN 111204634A
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- 239000000872 buffer Substances 0.000 title claims description 23
- 230000003139 buffering effect Effects 0.000 claims abstract description 25
- 238000013016 damping Methods 0.000 claims abstract description 19
- 229920001971 elastomer Polymers 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 11
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052580 B4C Inorganic materials 0.000 claims description 3
- 239000004593 Epoxy Substances 0.000 claims description 3
- 229920000181 Ethylene propylene rubber Polymers 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 3
- 229910000428 cobalt oxide Inorganic materials 0.000 claims description 3
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 claims description 3
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 3
- 235000019387 fatty acid methyl ester Nutrition 0.000 claims description 3
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 239000004014 plasticizer Substances 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims 1
- 230000006378 damage Effects 0.000 description 6
- 239000006173 Good's buffer Substances 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
Images
Classifications
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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
- B66B5/28—Buffer-stops for cars, cages, or skips
- B66B5/282—Structure thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/022—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using dampers and springs in combination
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2289—Oxides; Hydroxides of metals of cobalt
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses an elevator buffering device with high safety performance, which comprises a first mounting plate, a second mounting plate and a base, wherein multiple groups of high-strength damping springs are arranged between the first mounting plate and the second mounting plate, guide posts are arranged between two adjacent high-strength damping springs, multiple groups of buffering oil cylinders are arranged between the second mounting plate and the base, and the upper end parts of the buffering oil cylinders are connected with the lower end surface of the second mounting plate through buffering cushions.
Description
Technical Field
The invention relates to the technical field of elevator buffering, in particular to an elevator buffering device with high safety performance.
Background
Elevators and other lifting devices are essential for urban life, and the safety problem of elevators is also important for people to consider. When the elevator encounters an accident situation, such as sudden falling, a good buffer device is beneficial to reducing overweight injuries of people, and sometimes even lives of people can be saved. With the development of science and technology, the elevator is also continuously developed and progresses, wherein the elevator buffer device is also widely used. However, in the existing elevator buffer device on the market, impact force generated by high-speed falling of the elevator still impacts a buffer pad or a spring, the elevator is bounced up due to elasticity, secondary injury is easily caused to passengers in the elevator, and therefore improvement is needed.
Disclosure of Invention
The invention aims to provide an elevator buffer device with high safety performance so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an elevator buffer that security performance is high, includes first mounting panel, second mounting panel and base, install multiunit high strength damping spring between first mounting panel and the second mounting panel, and install the guide post between two adjacent high strength damping spring, install multiunit cushion cylinder between second mounting panel and the base, be connected through the blotter under cushion cylinder upper end and the second mounting panel between the terminal surface.
Preferably, the high-strength damping spring is provided with 8-10 groups, the high-strength damping spring comprises an upper fixing plate, a lower fixing plate, a spiral spring body and an elastic rubber block, the elastic rubber block is arranged between the upper fixing plate and the first mounting plate, the elastic rubber block is arranged between the lower fixing plate and the second mounting plate, and the spiral spring body is arranged between the upper fixing plate and the lower fixing plate.
Preferably, the buffer oil cylinder comprises a cylinder body, a rodless cavity is arranged on the inner side of the cylinder body, a first cavity for moving a first piston is arranged between one end of the rodless cavity and the inner side of one end of the cylinder body, a second cavity for moving a second piston is arranged between the other end of the rodless cavity and the other end of the inner side of the cylinder body, an oil port is arranged from the center of the side surface of the rodless cavity to the outer side of the cylinder body, and the oil port is connected with the hydraulic assembly through an oil pipe; the piston shaft tail end of the first piston is in contact with a boss at one end of the piston rod, the piston shaft tail end of the second piston is in contact with a front gear, the other end of the piston rod sequentially penetrates through the center of the hollow first piston rod, the center of the cylinder body and the center of the hollow second piston and then is connected with the front gear, and the front gear is connected with a stress component needing buffering through a flange plate.
Preferably, the upper surface of the first mounting plate is covered with a rubber material layer, and the rubber material layer comprises, by weight, 30-50 parts of ethylene propylene rubber, 20-40 parts of aluminum oxide, 10-20 parts of titanium dioxide, 5-15 parts of white carbon black, 5-10 parts of a plasticizer, 10-20 parts of epoxy fatty acid methyl ester, 4-10 parts of cobalt oxide, 3-9 parts of nano calcium carbonate, 3-5 parts of diatomite, 1-3 parts of montmorillonite, 2-4 parts of boron carbide and 4-8 parts of polyamide wax micropowder.
Preferably, the L-shaped connecting pieces are welded on two sides of the base respectively and comprise longitudinal sections and horizontal sections, the longitudinal sections and the horizontal sections are arranged vertically, the longitudinal sections are welded on the outer side wall of the base, and the horizontal sections are provided with locking through holes.
Preferably, the first mounting plate, the second mounting plate and the base are all made of steel materials.
Compared with the prior art, the invention has the beneficial effects that:
(1) the elevator buffer device has the advantages of novel structural design, good buffer performance, slow rebound after buffering, and capability of reducing secondary damage, and can effectively guarantee the safety of personnel in an elevator.
(2) The high-strength damping spring adopted by the invention has good damping and buffering effects, is not easy to deform, and can increase the overall buffering performance of the lift car.
(3) The buffer oil cylinder adopted by the invention can adapt to complex and variable impact buffering by freely adjusting the pressure range, overcomes the defects of the traditional buffering, effectively exerts the buffering effect, is slow in rebound after buffering, and prevents the secondary damage in the elevator caused by the quick return of the elevator car.
(4) In the invention, the rubber material layer covered on the upper surface of the mounting plate has buffering and wear-resisting properties, so that the whole device is protected.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the high-strength damping spring according to the present invention;
FIG. 3 is a schematic view of the structure of the cushion cylinder according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-3, the present invention provides the following technical solutions: an elevator buffer device with high safety performance comprises a first mounting plate 1, a second mounting plate 2 and a base 3, wherein the first mounting plate, the second mounting plate and the base are all made of steel materials; install multiunit high strength damping spring 4 between first mounting panel 1 and the second mounting panel 2, and install guide post 5 between two adjacent high strength damping spring 4, install multiunit cushion cylinder 6 between second mounting panel 2 and the base 3, be connected through blotter 7 between 6 upper end of cushion cylinder and the second mounting panel 2 lower terminal surface.
In the invention, 8-10 groups of high-strength damping springs 4 are arranged, each high-strength damping spring 4 comprises an upper fixing plate 8, a lower fixing plate 9, a spiral spring body 10 and an elastic rubber block 11, the elastic rubber block 11 is arranged between the upper fixing plate 8 and a first mounting plate 1, the elastic rubber block 11 is arranged between the lower fixing plate 9 and a second mounting plate 2, and the spiral spring body 10 is arranged between the upper fixing plate 8 and the lower fixing plate 9. The high-strength damping spring adopted by the invention has good damping and buffering effects, is not easy to deform, and can increase the overall buffering performance of the lift car.
In the invention, the buffer oil cylinder 6 comprises a cylinder body 12, a rodless cavity 13 is arranged on the inner side of the cylinder body 12, a first cavity 15 for enabling a first piston 14 to move is arranged between one end of the rodless cavity 13 and the inner side of one end of the cylinder body 12, a second cavity 17 for enabling a second piston 16 to move is arranged between the other end of the rodless cavity 13 and the inner side of the cylinder body 12, an oil port is arranged from the center of the side surface of the rodless cavity 13 to the outer side of the cylinder body 12, and the oil port is connected with a hydraulic assembly 18 through an oil; the tail end of a piston shaft of the first piston 14 touches a boss at one end of a piston rod 19, the tail end of a piston shaft of the second piston 16 touches a front stop 20, the other end of the piston rod 19 sequentially penetrates through the center of the hollow first piston 14, the center of the cylinder body 12 and the center of the hollow second piston 16 and then is connected with the front stop 20, and the front stop 20 is connected with a stress part needing buffering through a flange plate. The buffer oil cylinder adopted by the invention can adapt to complex and variable impact buffering by freely adjusting the pressure range, overcomes the defects of the traditional buffering, effectively exerts the buffering effect, is slow in rebound after buffering, and prevents the secondary damage in the elevator caused by the quick return of the elevator car.
In addition, in the invention, the upper surface of the first mounting plate is covered with a layer of rubber material layer, and the rubber material layer comprises 30-50 parts of ethylene propylene rubber, 20-40 parts of aluminum oxide, 10-20 parts of titanium dioxide, 5-15 parts of white carbon black, 5-10 parts of plasticizer, 10-20 parts of epoxy fatty acid methyl ester, 4-10 parts of cobalt oxide, 3-9 parts of nano calcium carbonate, 3-5 parts of diatomite, 1-3 parts of montmorillonite, 2-4 parts of boron carbide and 4-8 parts of polyamide wax micropowder according to parts by weight. In the invention, the rubber material layer covered on the upper surface of the mounting plate has buffering and wear-resisting properties, so that the whole device is protected.
In addition, the base 3 both sides have welded L shape connecting piece respectively, L shape connecting piece includes vertical section 21 and horizontal segment 22, vertical section 21 and horizontal segment 22 set up perpendicularly, vertical section 21 welds in the 3 lateral walls of base, it has the locking through-hole to open on the horizontal segment 22. The L-shaped connecting piece can improve the stability of the base installation.
In conclusion, the elevator buffer device has the advantages of novel structural design, good buffer performance, slow rebound after buffering, and capability of reducing secondary damage, and can effectively guarantee the safety of personnel in an elevator.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (6)
1. The utility model provides an elevator buffer that security performance is high, includes first mounting panel (1), second mounting panel (2) and base (3), its characterized in that: install multiunit high strength damping spring (4) between first mounting panel (1) and second mounting panel (2), and install guide post (5) between two adjacent high strength damping spring (4), install multiunit buffer cylinder (6) between second mounting panel (2) and base (3), be connected through blotter (7) between buffer cylinder (6) upper end and the terminal surface under second mounting panel (2).
2. The elevator buffer device with high safety as claimed in claim 1, wherein: high strength damping spring (4) set up 8-10 group, high strength damping spring (4) include upper fixed plate (8), bottom plate (9), the spiral spring body (10) and elastic rubber piece (11), install elastic rubber piece (11) between upper fixed plate (8) and first mounting panel (1), install elastic rubber piece (11) between bottom plate (9) and second mounting panel (2), install spiral spring body (10) between upper fixed plate (8) and bottom plate (9).
3. The elevator buffer device with high safety as claimed in claim 1, wherein: the buffer oil cylinder (6) comprises a cylinder body (12), a rodless cavity (13) is arranged on the inner side of the cylinder body (12), a first cavity (15) enabling a first piston (14) to move is arranged between one end of the rodless cavity (13) and the inner side of one end of the cylinder body (12), a second cavity (17) enabling a second piston (16) to move is arranged between the other end of the rodless cavity (13) and the other end of the inner side of the cylinder body (12), an oil port is formed from the center of the side face of the rodless cavity (13) to the outer side of the cylinder body (12), and the oil port is connected with a hydraulic assembly (18) through an oil pipe; the end of a piston shaft of the first piston (14) touches a boss at one end of a piston rod (19), the end of a piston shaft of the second piston (16) touches a front gear (20), the other end of the piston rod (19) sequentially penetrates through the center of the hollow first piston (14), the center of the cylinder body (12) and the center of the hollow second piston (16) and then is connected with the front gear (20), and the front gear (20) is connected with a force-bearing part needing buffering through a flange plate.
4. The elevator buffer device with high safety as claimed in claim 1, wherein: the upper surface of the first mounting plate is covered with a rubber material layer, and the rubber material layer comprises, by weight, 30-50 parts of ethylene propylene rubber, 20-40 parts of aluminum oxide, 10-20 parts of titanium dioxide, 5-15 parts of white carbon black, 5-10 parts of a plasticizer, 10-20 parts of epoxy fatty acid methyl ester, 4-10 parts of cobalt oxide, 3-9 parts of nano calcium carbonate, 3-5 parts of diatomite, 1-3 parts of montmorillonite, 2-4 parts of boron carbide and 4-8 parts of polyamide wax micropowder.
5. The elevator buffer device with high safety as claimed in claim 1, wherein: the base (3) both sides have welded L shape connecting piece respectively, L shape connecting piece includes vertical section (21) and horizontal segment (22), vertical section (21) and horizontal segment (22) set up perpendicularly, vertical section (21) welding is at base (3) lateral wall, it has the locking through-hole to open on horizontal segment (22).
6. The elevator buffer device with high safety as claimed in claim 1, wherein: the first mounting plate, the second mounting plate and the base are all made of steel materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010156458.1A CN111204634A (en) | 2020-03-09 | 2020-03-09 | Elevator buffer that security performance is high |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010156458.1A CN111204634A (en) | 2020-03-09 | 2020-03-09 | Elevator buffer that security performance is high |
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| Publication Number | Publication Date |
|---|---|
| CN111204634A true CN111204634A (en) | 2020-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010156458.1A Pending CN111204634A (en) | 2020-03-09 | 2020-03-09 | Elevator buffer that security performance is high |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112175391A (en) * | 2020-10-10 | 2021-01-05 | 上海淳信机电科技有限公司 | Non-metal composite material and water-resistant elevator buffer prepared from same |
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2020
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| CN106188676A (en) * | 2016-08-09 | 2016-12-07 | 安徽纯启动力机械有限公司 | A kind of high-quality stable bushing elastomeric material |
| CN206307875U (en) * | 2016-12-16 | 2017-07-07 | 苏州德菱邑铖精工机械股份有限公司 | One kind straight trip elevator car bottom damped junction device |
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| CN211871090U (en) * | 2020-03-09 | 2020-11-06 | 南通润雅机电科技有限公司 | Elevator buffer that security performance is high |
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