CN109179145B - Multi-stage buffer for elevator - Google Patents
Multi-stage buffer for elevator Download PDFInfo
- Publication number
- CN109179145B CN109179145B CN201811286718.6A CN201811286718A CN109179145B CN 109179145 B CN109179145 B CN 109179145B CN 201811286718 A CN201811286718 A CN 201811286718A CN 109179145 B CN109179145 B CN 109179145B
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- buffer
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- 239000000872 buffer Substances 0.000 title claims abstract description 235
- 239000007853 buffer solution Substances 0.000 claims abstract description 37
- 230000003139 buffering effect Effects 0.000 claims abstract description 34
- 238000013016 damping Methods 0.000 claims description 11
- 239000007787 solid Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000035939 shock Effects 0.000 description 5
- 230000005484 gravity Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- B66B5/282—Structure thereof
Landscapes
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
- Cage And Drive Apparatuses For Elevators (AREA)
Abstract
The invention relates to a multistage buffer for an elevator, which solves the problems of poor buffering effect, complex structure and large rebound force of the conventional buffer for the elevator and comprises a buffer base, wherein arc-shaped sliding blocks are arranged on the buffer base through sliding guide structures, the arc-shaped sliding blocks are circumferentially distributed and arranged, the inner sides of the arc-shaped sliding blocks circumferentially surround to form a conical channel, the circumferential outer sides of the arc-shaped sliding blocks are connected with the buffer base through horizontal buffer structures, multistage buffer components are arranged in the conical channel, each multistage buffer component comprises a first-stage buffer body, the lower end of the first-stage buffer body is sequentially provided with a second-stage buffer body and a third-stage buffer body, the first-stage buffer body, the second-stage buffer body and the third-stage buffer body are all in upper-large-small structures, conical grooves with the upper-large-small structures are formed in the second-stage buffer body and the third-stage buffer body, and the circumferential outer sides of the third-stage buffer body are contacted with conical friction surfaces of the conical channel. The invention has the advantages of good buffering effect, simple structure, small rebound force and the like.
Description
Technical Field
The invention relates to the technical field of elevator buffers, in particular to an elevator multistage buffer.
Background
Elevators are being increasingly used in various buildings. The reliability and safety of an elevator are closely related to the life safety of passengers, so that the elevator needs to be fitted with the necessary safety detection and safety protection devices, such as elevator buffers. The buffer is the last link of the elevator safety system and plays a role in buffering when the elevator breaks down or the accident squats. Thereby alleviating the elevator or the person in the elevator from direct impact. There are also a number of categories of elevator buffers, but existing elevator buffers have more or less drawbacks or there are areas for improvement. For example, some buffers have poor basic buffering effect, and the safety of the elevator cannot be ensured; some buffers are complex in structure; some energy-storage buffers have larger elasticity and are likely to cause harm to the personal safety of passengers.
In order to solve the defects existing in the prior art, long-term exploration is performed, and various solutions are proposed. For example, chinese patent literature discloses a spring damper for an elevator [ 20151290994. X ], including a spring damper for an elevator, characterized in that a damper plate is provided at an upper portion of the spring damper for an elevator, an inner damper plate holder is provided at an upper portion of the spring damper for an elevator, a damper sliding shaft is provided at an upper portion of the spring damper for an elevator, a sliding shaft clamping groove is provided at an upper portion of the spring damper for an elevator, a damper large spring is provided at an upper portion of the spring damper for an elevator, and a damper small spring is provided at an upper portion of the spring damper for an elevator.
The problem that the buffer effect of the existing elevator buffer is poor and the structure is complex is solved to a certain extent by the scheme, but the scheme still has a plurality of defects, for example, the high-elasticity spring is mainly arranged in the vertical direction, the rebound force is large, and the damage to passengers is possibly caused.
Disclosure of Invention
The invention aims to solve the problems and provides the elevator multistage buffer which is reasonable in design, good in buffering effect and simple in structure.
In order to achieve the above purpose, the present invention adopts the following technical scheme: this multistage buffer of elevator, including the buffer base that is the level setting, the buffer base on be equipped with a plurality of arc sliding blocks of making by polyurethane material and all being the arc through sliding guide structure, arc sliding block circumference distribution set up, the inboard circumference of arc sliding block surround and form the circular cone passageway that is circular cone tube-shape and circumference have the toper friction surface, arc sliding block circumference outside and buffer base between link to each other through horizontal buffer structure, just the diameter size of circular cone passageway upper end to the diameter size diameter of lower extreme diminish, circular cone passageway in be equipped with multistage buffering subassembly, multistage buffering subassembly including the one-level buffer body that is solid circular cone body form and upper end have the atress terminal surface, one-level buffer body lower extreme be equipped with in proper order from last secondary buffer body and the tertiary buffer body that sets up downwards and be circular cone body form, one-level buffer body, secondary buffer body and tertiary buffer body all be big end down small structure, just secondary buffer body and tertiary buffer body on all have and be big end down and lean on the circular cone body circumference of cone body and the circular cone groove that supports the one-level buffer body down in the circumference of the side of the circular cone body and the circular cone groove to the outer side of the circular cone. When the elevator car falls and presses to the buffer, the car can be contacted with the multistage buffering component, namely the car can press the uppermost one-stage buffering body, the one-stage buffering body can extrude the second-stage buffering body, the second-stage buffering body extrudes the third-stage buffering body again, because the gravity of the car, the third-stage buffering body downwards moves and extrudes the arc sliding block to move towards two sides under the action of the sliding guide structure, in the process, the horizontal buffering structure slows down the pressure and vibration on the horizontal direction, and the pressure and vibration on the inclined direction are slowed down between the multistage buffering component and with the inclined contact surface of the arc sliding block. The bumper is energy absorbing and has no high resilience component in the vertical direction.
In the elevator multistage buffer, the lower end of the primary buffer body is propped against the middle part or the lower part of the middle part of the conical groove of the secondary buffer body circumferentially outwards; the lower end of the secondary buffer body is propped against the middle part or the lower part of the middle part of the conical groove of the tertiary buffer body circumferentially outwards. The three buffer bodies are properly connected, which is beneficial to the gravity of the transmission lift car.
In the elevator multistage buffer, the heights of the primary buffer body, the secondary buffer body and the tertiary buffer body are equal, the taper of the primary buffer body, the taper of the secondary buffer body and the taper of the tertiary buffer body are gradually increased, and the shape of the primary buffer body, the secondary buffer body and the tertiary buffer body is favorable for pushing the arc-shaped sliding block to slide towards two sides.
In the elevator multistage buffer, the lower end of the three-stage buffer body is provided with a four-stage buffer body which is connected with the three-stage buffer body into an integrated structure and is in a shape of a solid truncated cone with a large upper part and a small lower part, and the peripheral outer side of the four-stage buffer body is contacted with the conical friction surface of the conical channel. The four-stage buffer body further enhances the buffer force and simultaneously pushes the arc-shaped sliding block to slide towards two sides.
In the elevator multistage buffer, the buffer base is disc-shaped, the number of the arc-shaped sliding blocks is four, the arc-shaped sliding blocks are uniformly distributed circumferentially and encircled by taking the center of the buffer base as the center of a circle to form an annular structure, and the conical channel is formed in the annular structure, so that the buffer stress is uniform.
In the elevator multistage buffer, the sliding guide structure comprises four sliding grooves which are circumferentially arranged on the buffer base, the sliding grooves are uniformly distributed circumferentially by taking the center of the buffer base as the center of a circle, one end of each sliding groove extends to the center of the buffer base, the other end of each sliding groove extends to the circumferential outside of the buffer base, sliding blocks corresponding to the sliding grooves are arranged at the bottoms of the arc-shaped sliding blocks, and the sliding blocks and the sliding grooves are mutually connected in a sliding mode. The sliding block and the sliding groove enable the arc-shaped sliding block to slide smoothly, and the phenomenon that the arc-shaped sliding block does not move under the extrusion of an elevator and does not play a buffering role is avoided.
In the elevator multistage buffer, the horizontal buffer structure comprises a plurality of buffer seats which are arranged on the circumferential outer side of the buffer base and are arranged in the vertical direction, the buffer seats respectively correspond to the outer sides of the arc-shaped sliding blocks one by one, the circumferential outer sides of the arc-shaped sliding blocks are provided with buffer rods which extend outwards and are arranged horizontally, the buffer seats are provided with mounting holes corresponding to the buffer rods, the buffer rods and the sliding grooves are arranged in parallel, linear bearings are arranged between the circumferential inner sides of the mounting holes and the circumferential outer sides of the buffer rods, and the buffer rods penetrate through the mounting holes and are provided with elastic buffer assemblies which enable the arc-shaped sliding blocks to keep moving towards the center of the buffer base.
In the elevator multistage buffer, the elastic buffer assembly comprises a buffer spring sleeved on the buffer rod, one end of the buffer spring is propped against the buffer seat, and the other end of the buffer spring acts on the outer side of the arc-shaped sliding block. The buffer spring has good elasticity and plays a great role in buffering in the horizontal direction.
In the elevator multistage buffer, a plurality of buffer bulges which are connected with the primary buffer body into an integral structure are arranged on the stress end surface of the primary buffer body. The car is in contact with the buffer projection.
In the elevator multistage buffer, the damping layer is plated on the conical friction surface, the circumferential outer side of the three-stage buffer body is in contact with the damping layer, and the upper end of the three-stage buffer body does not exceed the outer side of the upper end of the conical channel. The damping layer has good shock absorption, noise reduction and flame retardance and plays a great role in the aspect of buffering effect.
Compared with the prior art, the invention has the advantages that: the buffer is an energy-absorbing buffer, has small rebound force and ensures the safety of passengers; the buffer has simple structure; the buffer has a buffer structure in the horizontal and inclined directions, and is provided with a multi-stage buffer assembly, so that the buffer and shock absorption effects are good.
Drawings
FIG. 1 is a front cross-sectional view of the present invention;
FIG. 2 is a top view of the present invention;
in the figure, a buffer base 1, a sliding guide structure 2, a sliding groove 21, a sliding block 22, an arc-shaped sliding block 3, a conical channel 4, a damping layer 41, a horizontal buffer structure 5, a buffer seat 51, a buffer rod 52, a mounting hole 53, an elastic buffer assembly 54, a buffer spring 55, a linear bearing 56, a multistage buffer assembly 6, a primary buffer body 61, a secondary buffer body 62, a tertiary buffer body 63, a quaternary buffer body 64, a conical groove 65, a stress end surface 7 and a buffer protrusion 71.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
As shown in fig. 1-2, this elevator multistage buffer, including being the buffer base 1 that the level set up, be equipped with a plurality of arc sliding block 3 that make by polyurethane material and all be curved through sliding guide structure 2 on the buffer base 1, arc sliding block 3 circumference distribution sets up, arc sliding block 3 inboard circumference is formed and is cone-shaped and circumference has conical channel 4 of toper friction surface, link to each other through horizontal buffer structure 5 between arc sliding block 3 circumference outside and the buffer base 1, and diameter size to the diameter size diameter of lower extreme of conical channel 4 diminishes, be equipped with multistage buffering subassembly 6 in the conical channel 4, multistage buffering subassembly 6 is including being the one-level buffer body 61 that is solid conical frustum form and upper end has atress terminal surface 7, one-level buffer body 61 lower extreme is equipped with in proper order from last second grade buffer body 62 and the tertiary buffer body 63 that sets up downwards and be conical frustum form, first grade buffer body 61, second grade buffer body 62 and tertiary buffer body 63 all are big-lower small structure, and second grade buffer body 62 and tertiary buffer body 63 all have on the conical channel that is big-lower than the conical channel that is big-end lower than conical channel 62 is in the conical channel 65, the conical channel 65 is supported to the outside circumference side 65 in the third grade buffer body 63. When the elevator car falls and presses to the buffer, the car can be contacted with the multistage buffering component 6, namely the car can press the first-stage buffering body 61 at the uppermost end, the first-stage buffering body 61 can extrude the second-stage buffering body 62, the second-stage buffering body 62 extrudes the third-stage buffering body 63 again, due to the gravity of the car, the third-stage buffering body 63 moves downwards to extrude the arc sliding block 3 to move towards two sides under the action of the sliding guide structure 2, in the process, the horizontal buffering structure 5 slows down the pressure and vibration in the horizontal direction, and the inclined contact surface between the multistage buffering component 6 and the arc sliding block 3 slows down the pressure and vibration in the inclined direction. The bumper is energy absorbing and has no high resilience component in the vertical direction.
Specifically, the lower end of the primary buffer body 61 is abutted circumferentially outward against the middle or lower part of the conical groove 65 of the secondary buffer body 62; the lower end of the secondary cushion 62 is circumferentially and outwardly abutted against the middle or lower part of the conical groove 65 of the tertiary cushion 63.
Preferably, the heights of the primary buffer body 61, the secondary buffer body 62 and the tertiary buffer body 63 are equal, and the taper of the primary buffer body 61, the taper of the secondary buffer body 62 and the taper of the tertiary buffer body 63 become gradually larger. The shape of the arc-shaped sliding block is favorable for pushing the arc-shaped sliding block 3 to slide to two sides.
The lower end of the third-stage buffer body 63 is provided with a fourth-stage buffer body 64 which is connected with the third-stage buffer body 63 into an integral structure and is in the shape of a solid truncated cone with the upper part being large and the lower part being small, and the circumferential outer side of the fourth-stage buffer body 64 is contacted with the conical friction surface of the conical channel 4. The four-stage buffer body 64 further enhances the buffer force and simultaneously better pushes the arc-shaped sliding block 3 to slide towards two sides.
Obviously, the buffer base 1 is disc-shaped, the number of the arc-shaped sliding blocks 3 is four, the arc-shaped sliding blocks 3 are uniformly distributed circumferentially around the center of the buffer base 1 to form an annular structure, and the conical channel 4 is formed in the annular structure.
Further, the sliding guide structure 2 comprises four sliding grooves 21 circumferentially arranged on the buffer base 1, the sliding grooves 21 are uniformly distributed circumferentially by taking the center of the buffer base 1 as the center of a circle, one end of each sliding groove 21 extends to the center of the buffer base 1, the other end of each sliding groove extends to the circumferential outside of the buffer base 1, a sliding block 22 corresponding to the sliding groove 21 is arranged at the bottom of the arc-shaped sliding block 3, and the sliding blocks 22 and the sliding grooves 21 are mutually connected in a sliding manner. The sliding block 22 and the sliding groove 21 enable the arc-shaped sliding block 3 to slide smoothly, and the phenomenon that the arc-shaped sliding block 3 does not move under the extrusion of an elevator and does not play a buffering role is avoided.
Obviously, horizontal buffer structure 5 includes a plurality of settings at buffer base 1 circumference outside and be the buffer seat 51 that vertical direction set up, buffer seat 51 respectively with arc sliding block 3 outside one-to-one, arc sliding block 3 circumference outside is equipped with outwards extends and is the buffer pole 52 that the level set up, be equipped with on the buffer seat 51 with the corresponding mounting hole 53 of buffer pole 52, buffer pole 52 and the mutual parallel arrangement of sliding tray 21, and be equipped with linear bearing 56 between mounting hole 53 circumference inboard and buffer pole 52 circumference outside, buffer pole 52 wears to be equipped with in mounting hole 53 and on buffer pole 52 and enables arc sliding block 3 keep towards the elastic buffer subassembly 54 of buffer base 1 center motion trend.
Specifically, the elastic buffer assembly 54 includes a buffer spring 55 sleeved on the buffer rod 52, and one end of the buffer spring 55 abuts against the buffer seat 51, and the other end acts on the outer side of the arc-shaped slider 3. The buffer spring 55 has good elasticity and has a great buffer effect in the horizontal direction
The stress end surface 7 of the primary buffer body 61 is provided with a plurality of buffer protrusions 71 integrally connected with the primary buffer body 61. The car is in contact with the buffer projection 71
Preferably, the conical friction surface is plated with the damping layer 41, and the circumferential outer side of the tertiary buffer 63 is in contact with the damping layer 41, and the upper end of the tertiary buffer 63 does not exceed the outer side of the upper end of the conical channel 4. The damping layer 41 has good shock absorption, noise reduction and flame retardance and plays a great role in buffering effect.
The principle of this embodiment is: when the elevator car falls down to the buffer, the elevator car can be contacted with the multi-stage buffer assembly 6, namely, the elevator car can press the buffer bulge 71 on the uppermost primary buffer body 61, the primary buffer body 61 can press the secondary buffer body 62, the secondary buffer body 62 further presses the tertiary buffer body 63 and the quaternary buffer body 64, the tertiary buffer body 63 and the quaternary buffer body 64 move downwards to press the arc sliding block 3 to move along the sliding block 22 in the sliding groove 21 towards two sides due to the gravity of the elevator car, in the process, the pressure and vibration in the inclined direction are relieved between the multi-stage buffer assembly 6 and the inclined contact surface between the multi-stage buffer assembly and the arc sliding block 3, the damping layer 41 is rubbed to absorb shock and reduce noise, and the buffer rod 52 moves towards two sides to enable the buffer spring 55 to shrink, absorb shock and reduce pressure.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although terms of the damper base 1, the slide guide structure 2, the slide groove 21, the slide block 22, the arc-shaped slide block 3, the conical passage 4, the damping layer 41, the horizontal damper structure 5, the damper base 51, the damper rod 52, the mounting hole 53, the elastic damper assembly 54, the damper spring 55, the linear bearing 56, the multistage damper assembly 6, the primary damper body 61, the secondary damper body 62, the tertiary damper body 63, the quaternary damper body 64, the conical groove 65, the force-receiving end face 7, the damper protrusion 71, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the invention; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present invention.
Claims (8)
1. The utility model provides an elevator multistage buffer, includes buffer base (1) that is the level setting, a serial communication port, buffer base (1) on be equipped with a plurality of arc sliding block (3) that make and all be curved by polyurethane material through slip guide structure (2), arc sliding block (3) circumference distribution set up, arc sliding block (3) inboard circumference surround and form and be cone tube-shape and circumference have conical channel (4) of toper friction surface, arc sliding block (3) circumference outside and buffer base (1) between link to each other through horizontal buffer structure (5), just diameter size of conical channel (4) upper end diameter size to the diameter size diameter of lower extreme diminish, conical channel (4) in be equipped with multistage buffering subassembly (6), multistage buffering subassembly (6) including be solid one-level stage form and upper end have two-level buffer body (62) that are the toper friction surface (7), two-level buffer body (61) lower extreme be set up from last and be the second-level buffer body (62) that the stage form and be the stage form down in proper order, two-level buffer body (63) and three-level buffer body (63) on the three-level buffer body (63) and three-level buffer body (63) on the one-level buffer structure (63), the lower end of the primary buffer body (61) is in circumferential outer side contact with the conical groove (65) of the secondary buffer body (62), the lower end of the secondary buffer body (62) is in circumferential outer side contact with the conical friction surface of the conical channel (4) and the conical groove (65) of the tertiary buffer body (63);
the lower end of the primary buffer body (61) is propped against the middle part or the lower part of the middle part of the conical groove (65) of the secondary buffer body (62) circumferentially outwards; the lower end of the secondary buffer body (62) is propped against the middle part or the lower part of the middle part of the conical groove (65) of the tertiary buffer body (63) circumferentially outwards;
the conical friction surface is plated with a damping layer (41), the circumferential outer side of the three-stage buffer body (63) is in contact with the damping layer (41), and the upper end of the three-stage buffer body (63) does not exceed the outer side of the upper end of the conical channel (4).
2. The multi-stage buffer for an elevator according to claim 1, wherein the primary buffer body (61), the secondary buffer body (62) and the tertiary buffer body (63) are equal in height, and the taper of the primary buffer body (61), the taper of the secondary buffer body (62) and the taper of the tertiary buffer body (63) are gradually increased.
3. The multi-stage buffer for the elevator according to claim 2, wherein the lower end of the three-stage buffer body (63) is provided with a four-stage buffer body (64) which is connected with the three-stage buffer body (63) into a whole and is in the shape of a solid truncated cone with a large upper part and a small lower part, and the peripheral outer side of the four-stage buffer body (64) is contacted with the conical friction surface of the conical channel (4).
4. The multi-stage buffer for an elevator according to claim 1, 2 or 3, wherein the buffer base (1) is disc-shaped, the number of the arc-shaped sliding blocks (3) is four, the arc-shaped sliding blocks (3) are uniformly distributed and surrounded by taking the center of the buffer base (1) as the center of a circle to form an annular structure, and the conical channel (4) is formed in the annular structure.
5. The multistage buffer of claim 4, wherein the sliding guide structure (2) comprises four sliding grooves (21) circumferentially arranged on the buffer base (1), the sliding grooves (21) are uniformly circumferentially distributed by taking the center of the buffer base (1) as a circle center, one end of each sliding groove (21) extends to the center of the buffer base (1), the other end of each sliding groove extends to the circumferential outside of the buffer base (1), sliding blocks (22) corresponding to the sliding grooves (21) are arranged at the bottoms of the arc-shaped sliding blocks (3), and the sliding blocks (22) and the sliding grooves (21) are mutually connected in a sliding mode.
6. The elevator multistage buffer according to claim 4, wherein the horizontal buffer structure (5) comprises a plurality of buffer seats (51) which are arranged on the circumferential outer side of the buffer base (1) and are arranged in the vertical direction, the buffer seats (51) are respectively in one-to-one correspondence with the outer sides of the arc sliding blocks (3), the circumferential outer sides of the arc sliding blocks (3) are provided with buffer rods (52) which extend outwards and are horizontally arranged, the buffer seats (51) are provided with mounting holes (53) corresponding to the buffer rods (52), the buffer rods (52) and the sliding grooves (21) are arranged in parallel, linear bearings (56) are arranged between the circumferential inner sides of the buffer rods (52) and the circumferential outer sides of the buffer rods (52), and the buffer rods (52) penetrate through the mounting holes (53) and are provided with elastic buffer assemblies (54) which enable the arc sliding blocks (3) to keep moving towards the center of the buffer base (1).
7. The multi-stage buffer according to claim 6, characterized in that the elastic buffer assembly (54) comprises a buffer spring (55) sleeved on the buffer rod (52), one end of the buffer spring (55) is abutted against the buffer seat (51), and the other end acts on the outer side of the arc-shaped sliding block (3).
8. The multi-stage buffer for the elevator according to claim 6, wherein a plurality of buffer protrusions (71) which are connected with the primary buffer body (61) into an integral structure are arranged on the stress end surface (7) of the primary buffer body (61).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811286718.6A CN109179145B (en) | 2018-10-31 | 2018-10-31 | Multi-stage buffer for elevator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811286718.6A CN109179145B (en) | 2018-10-31 | 2018-10-31 | Multi-stage buffer for elevator |
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| CN109179145A CN109179145A (en) | 2019-01-11 |
| CN109179145B true CN109179145B (en) | 2023-12-29 |
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| CN112320530B (en) * | 2020-12-15 | 2022-02-18 | 博仕通电梯有限公司 | Elevator pit safety maintenance device |
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| CN109179145A (en) | 2019-01-11 |
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Effective date of registration: 20220429 Address after: 314099 room 410, building 14, Qixing garden, Qixing street, Nanhu District, Jiaxing City, Zhejiang Province Applicant after: Braun electromechanical (Jiaxing) Co.,Ltd. Address before: 313200 Moganshan high tech Industrial Development Zone, Huzhou City, Zhejiang Province (No. 899, Yunxiu North Road, Deqing County) Applicant before: BRAUN ELEVATOR Co.,Ltd. |
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