CN113998558A - Anti-disengaging structure of plunger for elevator buffer and elevator buffer - Google Patents
Anti-disengaging structure of plunger for elevator buffer and elevator buffer Download PDFInfo
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- CN113998558A CN113998558A CN202010738263.8A CN202010738263A CN113998558A CN 113998558 A CN113998558 A CN 113998558A CN 202010738263 A CN202010738263 A CN 202010738263A CN 113998558 A CN113998558 A CN 113998558A
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- plunger
- wall
- elevator buffer
- bottom cover
- clamp spring
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- 239000000872 buffer Substances 0.000 title claims abstract description 52
- 238000007789 sealing Methods 0.000 claims description 15
- 238000000926 separation method Methods 0.000 claims 2
- 230000003993 interaction Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 3
- 239000011295 pitch Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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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
- B66B5/28—Buffer-stops for cars, cages, or skips
-
- 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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- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention belongs to the technical field of elevator buffers, and particularly relates to an anti-disengaging structure of a plunger for an elevator buffer, wherein a bottom cover is arranged at an opening at the bottom of the plunger, the plunger is inserted into an oil cylinder so as to enable the bottom cover to be positioned in the oil cylinder, the anti-disengaging structure comprises a first clamp spring, a limiting groove is formed in the outer side wall of the bottom cover, and the first clamp spring is arranged in the limiting groove; the inner wall of the top of the oil cylinder is provided with an anti-dislocation part; when the plunger moves upwards to the target position, the first clamp spring interacts with the anti-falling part to limit the movement of the plunger along the upwards direction. According to the anti-falling structure of the plunger for the elevator buffer, the built-in design of the anti-falling position between the outer wall of the bottom cover of the plunger and the inner wall of the air cylinder is utilized, and compared with the existing external design of the switch contact rod, the anti-falling structure has better reliability, saves the installation space of the switch contact rod, and simplifies the structure of the elevator buffer.
Description
Technical Field
The invention belongs to the technical field of elevator buffers, and particularly relates to an anti-disengaging structure of a plunger for an elevator buffer and the elevator buffer.
Background
The hydraulic elevator buffer buffers and decelerates the car acting on the hydraulic elevator buffer to stop by means of hydraulic throttling damping, and plays a role in buffering protection.
Most of the existing hydraulic elevator buffers limit the stroke of a plunger through a switch contact rod, and the plunger is prevented from being separated from an oil cylinder. For example: patent document CN210884794U discloses a hydraulic shock absorber. The structure leads to the length of the switch contact rod to be longer, and the switch contact rod is arranged outside the plunger externally, because the spring in the buffering process rotates or deviates to cause the switch contact rod to incline, the plunger is more in the resetting process, and the reliability is ensured by good guiding or anti-rotation waiting measures. Not only occupies space, but also has complex structure. Therefore, there is a need for an improved anti-drop structure of the plunger for the elevator buffer.
Disclosure of Invention
Based on the defects in the prior art, the invention provides an anti-disengaging structure of a plunger for an elevator buffer and the elevator buffer.
In order to achieve the purpose, the invention adopts the following technical scheme:
an anti-disengaging structure of a plunger for an elevator buffer is characterized in that a bottom cover is installed at an opening in the bottom of the plunger, the plunger is inserted into an oil cylinder so that the bottom cover is located in the oil cylinder, the anti-disengaging structure comprises a first clamp spring, a limiting groove is formed in the outer side wall of the bottom cover, and the first clamp spring is installed in the limiting groove; the inner wall of the top of the oil cylinder is provided with an anti-dislocation part; when the plunger moves upwards to the target position, the first clamp spring interacts with the anti-falling part to limit the movement of the plunger along the upwards direction.
Preferably, the oil cylinder comprises a main body part, an anti-falling part and an opening part from bottom to top along the axial direction of the oil cylinder, the inner diameter of the main body part is larger than that of the opening part, the main body part and the opening part are transited through the anti-falling part, and the anti-falling part is located on the inner wall of the anti-falling part.
Preferably, the main body and the opening of the cylinder are in linear transition through a drop-preventing part, and the drop-preventing part is an inclined plane.
Preferably, the opening of the oil cylinder is provided with a plurality of spaced sealing grooves along the axial direction, and O-shaped sealing rings are arranged in the sealing grooves and are in sealing fit with the plunger.
As a preferred scheme, the limit groove of the bottom cover is provided with groove walls which are sequentially close to the inner wall of the oil cylinder from top to bottom along the axial direction of the plunger, and the diameter of the lowest position of the groove walls is matched with the inner diameter of the opening part of the oil cylinder; when the first clamp spring is positioned at the highest position of the groove wall, the diameter of the first clamp spring in a free state is matched with the inner diameter of the main body part of the oil cylinder.
Preferably, the inner wall of the plunger is provided with a first clamping groove, and the outer wall of the bottom cover is provided with a second clamping groove; and a second clamp spring contracts in the second clamping groove of the bottom cover under the action of external force, and when the bottom cover is inserted in the target position in the plunger, part of the clamp spring is expanded into the first clamping groove of the plunger so as to fix the plunger and the bottom cover.
Preferably, the inner wall of the plunger has a guide surface extending axially inward along the bottom opening thereof, so that the second snap spring and the guide surface interact with each other to be retracted into the second snap groove of the bottom cover.
Preferably, the structure of the guide surface is an annular structure matched with the side surface of the circular truncated cone.
Preferably, the diameter of the outermost side of the guide surface is not smaller than the outer diameter of the second snap spring in a free state.
The invention also provides an elevator buffer which comprises the anti-falling structure.
Compared with the prior art, the invention has the beneficial effects that:
according to the anti-disengaging structure of the plunger for the elevator buffer, the built-in design of the anti-disengaging structure between the outer wall of the bottom cover of the plunger and the inner wall of the air cylinder is utilized, and compared with the existing external design of the switch contact rod, the anti-disengaging structure has better reliability, saves the installation space of the switch contact rod, and simplifies the structure of the elevator buffer.
The structure of the elevator buffer is optimized, and the elevator buffer is beneficial to miniaturization design.
Drawings
Fig. 1 is a schematic structural view of an elevator buffer according to a first embodiment of the present invention;
fig. 2 is an axial partial sectional view of an elevator buffer according to a first embodiment of the present invention;
FIG. 3 is an enlarged view of section I of FIG. 2;
FIG. 4 is an enlarged view of section II of FIG. 3;
FIG. 5 is a schematic structural diagram of a spring seat according to a first embodiment of the present invention;
FIG. 6 is a structural schematic diagram of another perspective of the spring seat of the first embodiment of the present invention;
fig. 7 is a schematic structural diagram of a bracket according to a first embodiment of the invention.
Fig. 8 is a schematic structural view of an elevator buffer according to a second embodiment of the present invention;
fig. 9 is an axial partial sectional view of an elevator buffer according to a second embodiment 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.
The first embodiment is as follows:
as shown in fig. 1 to 7, the anti-drop structure of the plunger for the elevator buffer of the present embodiment is applied to the elevator buffer.
The elevator buffer comprises an oil cylinder 1, a plunger 2, a reset mechanism and a safety switch 4.
Specifically, the oil cylinder 1 of the present embodiment is installed above the base 0; the plunger 2 is a hollow structure with an opening at the bottom, and a bottom cover 5 is arranged at the opening at the bottom. The plunger 2 is inserted into the oil cylinder 1, so that the bottom cover 5 is positioned in the oil cylinder 1. As shown in fig. 3, the inner wall of the plunger 2 has a first locking groove 2a, and the first locking groove 2a is an annular groove extending radially outward from the inner wall of the plunger; the outer side wall of the bottom cover 5 has a second catching groove 5a, and the second catching groove 5a is an annular groove along which the outer side wall of the bottom cover extends radially inward. Plunger 2 passes through 6 fixed connection of second jump ring with bottom 5, and the concrete mounting means of second jump ring 6 is as follows: the second snap spring 6 contracts into the second snap groove 5a of the bottom cover under the action of external force, when the bottom cover 5 is inserted into the target position in the plunger 2, part of the second snap spring 6 expands into the first snap groove 2a of the plunger, namely, one side of the second snap spring 6 is located in the first snap groove 2a of the plunger, and the other side of the second snap spring 6 is located in the second snap groove 5a of the bottom cover, so that the plunger 2 is connected with the bottom cover 5. The connecting mode that adopts the second jump ring between plunger and the bottom of this embodiment replaces welding or threaded connection among the prior art, reducible processing improves assembly efficiency.
The inner wall of the plunger 2 of this embodiment has a guide surface 2b extending inward along the axial direction of the bottom opening thereof, so that the second snap spring 6 and the guide surface 2b of the plunger interact with each other to be retracted into the second snap groove 5b of the bottom cover. The first clamping groove 2a of the inner wall of the plunger is located on the inner side of the guide surface 2b, so that the second clamp spring can be clamped into the first clamping groove 2a after passing through the guide surface 2 b. The structure of the guide surface 2b is an annular structure matched with the side face of the circular truncated cone, and the caliber of the outermost side of the guide surface 2b is not smaller than the outer diameter of the second clamp spring 6 in a free state, so that the second clamp spring 6 can be assembled conveniently. The number of the second snap springs is not limited to one piece, and can also be multiple pieces, and the second snap springs are overlapped in the first snap grooves 2a of the plunger and the second snap grooves 5a of the bottom cover, so that the connection stability between the plunger and the bottom cover is improved.
A sealing ring 7 can be arranged between the inner wall of the plunger 2 and the outer side wall of the bottom cover 5 in the embodiment, and the sealing ring 7 is in sealing fit between the guide surface 2b of the plunger and the outer wall of the bottom cover 5. Wherein, the outer wall of bottom cap 5 has the bulge loop 5b of radially outwards extending along it, and the bottom of plunger 2 supports and leans on the bulge loop 5b of bottom cap, and sealing washer 7 and the leading surface 2b of plunger, the outer wall of bottom cap 5 and bulge loop 5b sealing contact prevent that the interior oil of plunger from getting into the hydro-cylinder from the installation gap between plunger and the bottom cap, influence the shock-absorbing capacity of elevator buffer.
As shown in fig. 3 and 4, the outer side wall of the bottom cover 5 of the present embodiment has a stopper groove 5c, and the stopper groove 5c is located below the protruding ring 5 b.
The anti-falling structure of the embodiment comprises a first clamp spring 8 which is arranged in the limiting groove 5 c; correspondingly, the inner side wall of the oil cylinder 1 is provided with an anti-disengaging position 1a matched with the first clamp spring 8, and the anti-disengaging position 1a is an anti-disengaging inclined plane and can also be a limiting clamping groove; when the plunger 2 is reset to the target position under the action of the resetting mechanism, the first clamp spring 8 and the anti-falling inclined plane of the oil cylinder perform mutual extrusion action to limit the plunger 2 to continuously move along the resetting direction, so that the stroke of the plunger is limited, and the plunger 2 is prevented from being separated from the oil cylinder 1 under the linkage of the resetting mechanism. Specifically, the oil cylinder 1 sequentially comprises a main body part 1-1, an anti-falling part 1-2 and an opening part 1-3 from bottom to top along the axial direction, the inner diameter of the main body part 1-1 is larger than that of the opening part 1-3, the main body part 1-1 and the opening part 1-3 are transited through the anti-falling part 1-2, specifically through the anti-falling part 1-2, linear transition or arc transition can be adopted; the anti-slip part 1a is positioned on the inner wall of the anti-slip part 1-2. The limiting groove 5c of the bottom cover is provided with a groove wall 5cc which is sequentially close to the inner wall of the oil cylinder from top to bottom along the axial direction of the plunger, and the diameter of the lowest position of the groove wall is matched with the inner diameter of the opening part 1-3 of the oil cylinder; when the first clamp spring 8 is located at the highest position of the groove wall, the diameter of the first clamp spring 8 in a free state is matched with the inner diameter of the main body part 1-1 of the oil cylinder, and the first clamp spring 8 is prevented from falling out from a gap between the limiting groove and the main body part of the oil cylinder. In addition, the opening 1-3 of the oil cylinder of the embodiment has three spaced sealing grooves (the number of the sealing grooves is not limited to three, and the specific number can be adjusted according to actual requirements), and an O-ring 15 is installed in the sealing groove to be in sealing fit with the plunger 2, so that the air tightness between the plunger and the oil cylinder is ensured.
The return mechanism of the present embodiment includes a spring seat 30, a first return spring 31, a bracket 32, a second return spring 33, and a pressure spring cover 34. The spring seat 30 is arranged on the outer side wall of the oil cylinder 1; the first return spring 31 is sleeved outside the oil cylinder 1 and abuts against the spring seat 30; the bracket 32 is sleeved outside the oil cylinder 1 and is abutted against the first return spring 31; the second return spring 33 is sleeved outside the plunger 2 and the oil cylinder 1 and abuts against the bracket 32; a pressure spring cover 34 is mounted on top of the plunger and rests on the second return spring 33. Wherein the pitch of the first return spring 31 is smaller than the pitch of the second return spring 33.
The spring seat 30 of the embodiment is clamped outside the outer side wall of the oil cylinder 1; specifically, as shown in fig. 5 and 6, the spring seat 30 includes a first half ring 30a and a second half ring 30b, one end of the first half ring 30a is hinged to one end of the second half ring 30b, and the other end of the first half ring 30a and the other end of the second half ring 30b are detachably connected through bolt and bolt hole matching, so as to form a clamping cavity 300 in clamping fit with the oil cylinder 1; the detachable connection mode can also adopt the existing connection modes such as clamping, insertion and the like. In addition, as shown in fig. 3, the outer side wall of the oil cylinder 1 is provided with a mounting position 1b matched with the clamping cavity 300 of the spring seat, the outer diameter of the upper part of the mounting position 1b is smaller than that of the lower part thereof, the upper part and the lower part of the mounting position 1b are in arc transition, and the clamping cavity 300 is internally provided with a limiting part 300a matched with the structure of the mounting position 1b so as to limit the spring seat 30 to move downwards in the working process of the elevator buffer. The design of the spring holder of this embodiment has solved the problem that current spring holder welding warp behind the hydro-cylinder, need not to carry out stress treatment because of warping, and the technology is simplified.
In addition, the inner walls of the first half ring 30a and the second half ring 30b are respectively provided with a first flange 30aa and a second flange 30bb extending along the axial direction of the cylinder, and the bottom of the first return spring 31 is tightly held by the first flange 30aa and the second flange 30bb, thereby improving the buffering performance of the elevator buffer. The first half ring 30a of the spring holder of the present embodiment has a mounting portion 30c extending outward, and the mounting portion 30c has a mounting hole for mounting the safety switch 4 without additionally providing a mounting attachment of the safety switch.
As shown in fig. 7, the bracket 32 of the present embodiment includes a circular ring main body 32a, a lower collar 32b extending downward from an inner ring of the circular ring main body, and an upper collar 32c extending upward from an outer ring of the circular ring main body, the circular ring main body 32a is sleeved outside the cylinder 1, a top of the first return spring 31 is clasped outside the lower collar 32b, and a bottom of the second return spring 33 is clasped inside the upper collar 32c, so as to ensure stability of extension and retraction of the first return spring and the second return spring. In addition, the annular body 32a of the bracket has a trigger 9 on the side corresponding to the safety switch 4 for triggering the safety switch 4. Specifically, the triggering piece 9 is a bending piece, and the bending piece is provided with a triggering inclined surface 9a corresponding to the safety switch, so that the reliability of triggering the safety switch is improved, and the safety of the elevator buffer is improved.
As shown in fig. 2 and 3, the side wall of the oil cylinder 1 of the present embodiment has three bolt holes with different heights, and each bolt hole is hermetically connected with an oil level detection bolt 10, so as to facilitate the detection of the oil level in the oil cylinder.
As shown in fig. 1 and 2, the exhaust valve body assembly 11 is disposed on the top of the plunger 2 in this embodiment, and the specific structure of the exhaust valve body assembly 11 can refer to the prior art and is not described herein. In the present embodiment, a cushion pad 12 is attached above the plunger 2, the cushion pad 12 is fitted to the top of the plunger 2, and the cushion pad 12 and the top of the plunger 2 are fitted to each other by a Z-shaped structure, so that the cushion pad is firmly fixed to the plunger 2. Among them, the cushion pad is preferably made of rubber.
In the present embodiment, a dust cover 13 is installed between the plunger 2 and the top of the cylinder 1 to prevent interference of foreign objects. Wherein the cushion pad 12 is positioned above the dust cover 13.
The oil cylinder and the plunger piston of the embodiment can both adopt a spinning forming technology to spin-form a flat plate material into a cylindrical structure, so that the oil cylinder and the plunger piston are manufactured. The spinning forming technology is adopted, and the method is particularly suitable for forming a high-strength thin-wall cylindrical structure; the flat plate material adopts a material with higher strength to replace common steel, thereby benefiting the higher material strength, realizing the replacement of a large structure by a small structure and lightening the whole mass from a metal material.
Example two:
the elevator buffer of this embodiment uses the anti-disengaging structure of the plunger different from the first embodiment in that: the buffer is applied to another elevator buffer, and the elevator buffer is different from the elevator buffer of the first embodiment in the structure of the resetting mechanism.
Specifically, as shown in fig. 8 and 9, the return mechanism of the present embodiment includes a spring seat, a return spring with unequal pitches, and a pressure spring cover, and the mounting structure of the spring seat and the pressure spring cover is the same as that of the first embodiment, and one return spring 14 with unequal pitches is used to replace two return springs and a bracket of the first embodiment, thereby simplifying the structure of the return mechanism. Wherein, the pitch of the bottom of the return spring with unequal pitches is smaller than that of the top of the return spring; the trigger piece is fixed at the bottom of the unequal-pitch return spring and is not positioned on the spring coil at the bottommost end, so that the safety switch can be triggered, and the sensitivity is higher. The structure diversification of the elevator buffer is realized to meet the requirements of different applications.
Other structures can refer to the first embodiment.
Example three:
the elevator buffer of the present embodiment is different from the first embodiment in that:
the bolt holes on the side wall of the oil cylinder are not limited to three bolt holes listed in the first embodiment, and can also be two, four or five bolt holes with different heights, and each bolt hole is hermetically connected with an oil level detection bolt, so that the oil level in the oil cylinder can be conveniently detected.
Other structures can refer to the first embodiment.
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. An anti-disengaging structure of a plunger for an elevator buffer is characterized in that the anti-disengaging structure comprises a first clamp spring, the outer side wall of the bottom cover is provided with a limiting groove, and the first clamp spring is arranged in the limiting groove; the inner wall of the top of the oil cylinder is provided with an anti-dislocation part; when the plunger moves upwards to the target position, the first clamp spring interacts with the anti-falling part to limit the movement of the plunger along the upwards direction.
2. The anti-drop structure of the plunger for the elevator buffer as claimed in claim 1, wherein the cylinder comprises a main body portion, an anti-drop portion and an opening portion from bottom to top along an axial direction of the cylinder, an inner diameter of the main body portion is larger than an inner diameter of the opening portion, the main body portion and the opening portion are transited through the anti-drop portion, and the anti-drop portion is located on an inner wall of the anti-drop portion.
3. The plunger retaining structure for an elevator buffer according to claim 2, wherein the main body portion and the opening portion of the cylinder are linearly transited through the retaining portion, and the retaining portion is a slope.
4. The anti-drop structure of plunger for elevator buffer as defined in claim 2, wherein said opening of said cylinder has a plurality of spaced sealing grooves along its axial direction, and O-rings are installed in said sealing grooves to be sealingly engaged with said plunger.
5. The anti-drop structure of the plunger for the elevator buffer as claimed in claim 2, wherein the limit groove of the bottom cover has a groove wall which is sequentially close to the inner wall of the cylinder from top to bottom along the axial direction of the plunger, and the diameter of the lowest position of the groove wall is matched with the inner diameter of the opening part of the cylinder; when the first clamp spring is positioned at the highest position of the groove wall, the diameter of the first clamp spring in a free state is matched with the inner diameter of the main body part of the oil cylinder.
6. The anti-release structure of a plunger for an elevator buffer according to claim 1, wherein the inner wall of the plunger has a first catching groove, and the outer wall of the bottom cover has a second catching groove; and a second clamp spring contracts in the second clamping groove of the bottom cover under the action of external force, and when the bottom cover is inserted in the target position in the plunger, part of the clamp spring is expanded into the first clamping groove of the plunger so as to connect the plunger and the bottom cover.
7. The anti-separation structure of a plunger for an elevator buffer as claimed in claim 6, wherein the inner wall of the plunger has a guide surface extending axially inward along the bottom opening thereof so that the second clamp spring is retracted into the second clamping groove of the bottom cover by interaction with the guide surface.
8. The anti-dropping structure of the plunger for the elevator buffer as claimed in claim 7, wherein the structure of the guide surface is a ring structure matching with the side surface of the circular truncated cone.
9. The plunger retaining structure for an elevator buffer according to claim 8, wherein an outermost diameter of the guide surface is not smaller than an outer diameter of the second circlip in a free state.
10. An elevator buffer characterized by comprising the anti-separation structure according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010738263.8A CN113998558B (en) | 2020-07-28 | 2020-07-28 | Anti-drop structure and elevator buffer of plunger for elevator buffer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010738263.8A CN113998558B (en) | 2020-07-28 | 2020-07-28 | Anti-drop structure and elevator buffer of plunger for elevator buffer |
Publications (2)
| Publication Number | Publication Date |
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| CN113998558A true CN113998558A (en) | 2022-02-01 |
| CN113998558B CN113998558B (en) | 2024-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010738263.8A Active CN113998558B (en) | 2020-07-28 | 2020-07-28 | Anti-drop structure and elevator buffer of plunger for elevator buffer |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07237846A (en) * | 1994-02-25 | 1995-09-12 | Hitachi Ltd | Oil buffer for elevator |
| KR200340820Y1 (en) * | 2003-11-12 | 2004-02-05 | 덕 규 김 | A buffer for elevator |
| CN204022191U (en) * | 2014-09-05 | 2014-12-17 | 苏州尼隆电梯部件有限公司 | Buffer of elevator |
| CN106744147A (en) * | 2016-12-30 | 2017-05-31 | 苏州尼隆电梯部件有限公司 | Hydraulic pressure elevator buffer |
| CN108178042A (en) * | 2017-12-01 | 2018-06-19 | 宁波奥德普电梯部件有限公司 | A kind of novel elevator buffer |
| CN210371795U (en) * | 2019-04-23 | 2020-04-21 | 浙江西子富沃德电机有限公司 | Oil buffer |
| CN210884794U (en) * | 2019-07-29 | 2020-06-30 | 杭州沪宁电梯部件股份有限公司 | Hydraulic buffer |
| CN212893342U (en) * | 2020-07-28 | 2021-04-06 | 杭州沪宁电梯部件股份有限公司 | Anti-disengaging structure of plunger for elevator buffer and elevator buffer |
-
2020
- 2020-07-28 CN CN202010738263.8A patent/CN113998558B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07237846A (en) * | 1994-02-25 | 1995-09-12 | Hitachi Ltd | Oil buffer for elevator |
| KR200340820Y1 (en) * | 2003-11-12 | 2004-02-05 | 덕 규 김 | A buffer for elevator |
| CN204022191U (en) * | 2014-09-05 | 2014-12-17 | 苏州尼隆电梯部件有限公司 | Buffer of elevator |
| CN106744147A (en) * | 2016-12-30 | 2017-05-31 | 苏州尼隆电梯部件有限公司 | Hydraulic pressure elevator buffer |
| CN108178042A (en) * | 2017-12-01 | 2018-06-19 | 宁波奥德普电梯部件有限公司 | A kind of novel elevator buffer |
| CN210371795U (en) * | 2019-04-23 | 2020-04-21 | 浙江西子富沃德电机有限公司 | Oil buffer |
| CN210884794U (en) * | 2019-07-29 | 2020-06-30 | 杭州沪宁电梯部件股份有限公司 | Hydraulic buffer |
| CN212893342U (en) * | 2020-07-28 | 2021-04-06 | 杭州沪宁电梯部件股份有限公司 | Anti-disengaging structure of plunger for elevator buffer and elevator buffer |
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| Publication number | Publication date |
|---|---|
| CN113998558B (en) | 2024-05-07 |
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