CN111792494A - Single-upright-column multi-storey building elevator with traction machine arranged at lower part - Google Patents
Single-upright-column multi-storey building elevator with traction machine arranged at lower part Download PDFInfo
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- CN111792494A CN111792494A CN201910556170.0A CN201910556170A CN111792494A CN 111792494 A CN111792494 A CN 111792494A CN 201910556170 A CN201910556170 A CN 201910556170A CN 111792494 A CN111792494 A CN 111792494A
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- pulley
- elevator
- groove
- counterweight
- traction machine
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- 239000004567 concrete Substances 0.000 claims description 9
- 230000002146 bilateral effect Effects 0.000 claims description 5
- 239000012780 transparent material Substances 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000000670 limiting effect Effects 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003974 emollient agent Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/0035—Arrangement of driving gear, e.g. location or support
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/30—Constructional features of doors or gates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B17/00—Hoistway equipment
- B66B17/12—Counterpoises
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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
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
- B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/02—Guideways; Guides
- B66B7/021—Guideways; Guides with a particular position in the shaft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/02—Guideways; Guides
- B66B7/022—Guideways; Guides with a special shape
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/02—Guideways; Guides
- B66B7/04—Riding means, e.g. Shoes, Rollers, between car and guiding means, e.g. rails, ropes
- B66B7/047—Shoes, sliders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/06—Arrangements of ropes or cables
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Automation & Control Theory (AREA)
- Types And Forms Of Lifts (AREA)
Abstract
The utility model provides a single-column multilayer building elevator of lower hauler, includes hollow support post, elevator car and base, and the base setting is subaerial, and support post's lower extreme and base fixed connection, upper end are provided with the pulley block case, and pulley block case and building fixed connection are provided with the hauler in the base, are provided with in the support post to counter weight, and elevator car passes through the rope with to counter weight to be connected, through the hauler drive. The traction machine is arranged in the base, the counterweight is arranged in the supporting upright column, the floor area of the elevator is reduced, and the lighting of residents cannot be influenced by using the single supporting upright column.
Description
Technical Field
The invention relates to the technical field of elevators outside multi-storey buildings, in particular to a single-upright-column multi-storey building elevator with a traction machine arranged at the bottom.
Background
Provisions in the residential design code: the seven-storey and more than seven-storey houses or houses with the height of the entrance floor of the resident more than 16m from the outdoor design ground are required to be provided with elevators, most houses are under 6 floors before 20 years, and the elevators are not required to be installed. Now, as living conditions of people improve, the ages of residents increase, and the elevator needs are met. The existing elevator is additionally arranged on the periphery of a building, so that the occupied area is large, and the lighting of residents is influenced.
Disclosure of Invention
The invention aims to solve the problems and provides a single-column multi-storey building elevator with a traction machine arranged at the bottom.
The technical scheme of the invention is as follows:
a single-upright-column multi-storey building elevator with a traction machine arranged at the bottom comprises a hollow supporting upright column, an elevator car and a base, wherein the base is buried under the ground and comprises a reinforced concrete foundation and a cabin, the cabin is arranged right below the reinforced concrete foundation, the traction machine is arranged in the cabin, a first groove and a second groove are formed in a traction wheel of the traction machine, and a buffer is arranged on the reinforced concrete foundation;
the lower end of the supporting upright post is fixedly connected with the base, guide rails are arranged on two sides of the supporting upright post, the guide rail is of a step type, the step guide rail comprises a braking surface and a sliding surface which are staggered in steps, the upper end of the supporting upright post is provided with a pulley block box, the pulley block box is fixedly connected with the top floor of the building, a first pulley, a second pulley block and a third pulley block are arranged in the pulley block box, the first pulley is provided with a third groove and a fourth groove, the second pulley block comprises a second pulley and a third pulley, the third pulley block comprises a fourth pulley and a fifth pulley, the third groove of the first pulley, the first groove of the traction machine, the groove of the second pulley and the groove of the third pulley are on the same vertical plane, the fourth groove of the first pulley, the second groove of the traction machine, the groove of the fourth pulley and the groove of the fifth pulley are on the same vertical plane;
a vertical central sleeve is arranged at the central axis position of the elevator car, two ends of the central sleeve penetrate through the upper end surface and the lower end surface of the elevator car, the central sleeve is sleeved outside the supporting upright post, the upper end surface and the lower end surface of the elevator car are respectively provided with guide shoes in a bilateral symmetry manner, the cross sections of the guide shoes are U-shaped, the guide shoes are sleeved on the sliding surface of the guide rail, the elevator car is provided with brake calipers in a bilateral symmetry manner, and the brake calipers are sleeved on the brake surface of the guide rail;
a counterweight is arranged in the supporting upright post, a vertical left positioning hole and a vertical right positioning hole are arranged on the counterweight, a rope is connected with the upper end of the counterweight and is divided into a left rope and a right rope,
one end of a left rope is fixedly connected with the middle part of the upper end of the counterweight, passes through a left positioning hole of the counterweight downwards after passing through a third groove of a first pulley upwards from the counterweight, then passes through a right positioning hole of the counterweight upwards after passing through a first groove on a traction wheel of a traction machine, then passes through a second pulley, then passes through a third pulley along the horizontal direction, and then is connected with the left side of the upper end surface of the elevator car downwards,
one end of a right rope is fixedly connected with the middle part of the upper end of the counterweight, passes through a left positioning hole of the counterweight downwards after passing through a fourth groove of the first pulley upwards from the counterweight, then passes through a right positioning hole of the counterweight upwards after passing through a second groove on a traction sheave of the traction machine, then passes through a fourth pulley, then passes through a fifth pulley along the horizontal direction, and then is connected with the right side of the upper end surface of the elevator car downwards,
the elevator car is provided with a double-leaf outward-opening side-hung elevator door, the elevator door comprises an entrance elevator door facing one side of the building and an entrance elevator door facing the other side of the building, and the width of the entrance elevator door is equal to the distance between the elevator car and the building.
Preferably, the pulley block box is fixedly connected with the building through a pulley block box passageway pedal.
Preferably, the bottom layer of the elevator is provided with a ground protection room, the ground protection room is provided with an access door facing the building and a boarding door back to the building, the access door and the boarding door are both sliding doors, and the width of the boarding door is equal to the distance from the elevator car to the boarding door.
Preferably, the cage and the ground protection chamber are made of transparent materials.
Preferably, the reinforced concrete foundation is provided with a manhole, and the manhole is communicated with the engine room.
The invention has the beneficial effects that:
1. the traction machine is arranged in the base, and the counterweight is arranged in the supporting upright column, so that the floor area of the elevator is reduced;
2. the arrangement of the single supporting upright post ensures that the elevator does not influence the lighting of residents;
3. the steel-concrete foundation is provided with a buffer, and when the elevator car descends to the lowest layer, the buffer plays a role in buffering;
4. the stepped guide rail comprises a braking surface and a sliding surface which are staggered in steps, so that the lubricant on the sliding surface cannot easily flow onto the braking surface to influence the braking effect;
5. the guide shoes have vertical guide effect and transverse limiting effect on the elevator car, so that the horizontal shaking of the elevator car is limited, and meanwhile, the elevator car cannot be axially twisted, so that the collision in the running process is avoided;
6. the brake calipers can prevent the elevator from falling when an accident happens;
7. the left positioning hole and the right positioning hole play a role in vertically guiding and horizontally limiting the counterweight, so that the horizontal shaking of the counterweight is limited, meanwhile, the counterweight cannot be axially twisted, and the collision in the operation process is avoided;
8. the counterweight is arranged in the supporting upright post, and the left rope and the right rope are arranged, so that the effect which can be achieved by two counterweights can be achieved by only using one counterweight;
9. the width of the door of the elevator for entering the house is equal to the distance between the elevator car and the building, and after the door of the elevator for entering the house is opened, a gap between the elevator car and the building can be made up, so that the resident is prevented from falling from the side;
10. the pulley block box is fixedly connected with the building through a pulley block box passageway pedal, the support upright posts can be reinforced through the pulley block box passageway pedal, and meanwhile, workers can also inspect and maintain the pulley blocks;
11. the width of the passenger elevator door is equal to the distance from the elevator car to the passenger elevator door, and when the passenger elevator door is opened, a person is prevented from entering the ground protection room;
12. the maintenance hole has been seted up on the steel reinforced concrete ground, and the staff can get into the cabin through the maintenance hole, maintains equipment.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a view A-A of FIG. 2;
FIG. 4 is a view B-B of FIG. 2;
FIG. 5 is a top view of the present invention;
FIG. 6 is an enlarged view at Z of FIG. 5;
FIG. 7 is a view C-C of FIG. 5;
FIG. 8 is a D-D view of FIG. 5;
FIG. 9 is an enlarged view at X of FIG. 7;
FIG. 10 is a perspective view of the guide shoe;
FIG. 11 is a perspective view of the brake caliper;
FIG. 12 is a horizontal cross-sectional view of the guide rail;
in the figure: 1. the elevator comprises a base, 2 support columns, 3 an elevator car, 4 a traction machine, 5 a buffer, 6 guide rails, 7 a pulley block box, 8 a first pulley, 9 a second pulley block, 10 a third pulley block, 11 guide shoes, 12 brake calipers, 13 a counterweight, 14 a rope, 15 a pedal, 16 an entrance elevator door, 17 an entrance elevator door, 18 a pulley block box passageway pedal, 19 a ground protection chamber, 20 an access door, 21 an entrance door, 22 an access hole, 1-1 steel-concrete foundation, 1-2 engine room, 3-1 central sleeve, 4-1 first groove, 4-2 second groove, 6-1 brake surface, 6-2 sliding surface, 8-1 third groove, 8-2 fourth groove, 9-1 second pulley, 9-2 third pulley, 7 pulley block box, 8 a pulley block box, 9-2 pulley block box, 9-second pulley block, 9-2 pulley block box, 9-1 pulley block box, 2 pulley block, 10-1, a fourth pulley, 10-2, a fifth pulley, 13-1, a left positioning hole and 13-2, a right positioning hole.
Detailed Description
As shown in fig. 1-12, a single-column multi-story building elevator with a traction machine underneath is characterized by comprising a hollow supporting column, an elevator car and a base, wherein the base is buried under the ground, the base comprises a steel-concrete foundation and a cabin, the cabin is arranged under the steel-concrete foundation, the traction machine is arranged in the cabin, a first groove and a second groove are arranged on a traction wheel of the traction machine, a buffer is arranged on the steel-concrete foundation, and the buffer plays a role in buffering when the elevator car descends to the lowest floor;
the support column lower extreme and base fixed connection, the both sides of support column are provided with the guide rail, the guide rail is the notch cuttype, and the ladder guide rail includes the staggered brake lining of step and glide plane, and the purpose makes the emollient on the glide plane can not flow easily on the brake lining, influence braking effect, the upper end of support column is provided with the pulley block case, the pulley block case is with the top of building fixed connection of building, be provided with first pulley, second assembly pulley and third assembly pulley in the pulley block case, be equipped with third recess and fourth recess on the first pulley, the second assembly pulley includes second pulley and third pulley, the third assembly pulley includes fourth pulley and fifth pulley, the third recess of first pulley, the first recess of hauler, the recess of second pulley and the recess of third pulley are on same vertical plane, the fourth recess of first pulley, the recess of second pulley, The second groove of the traction machine, the groove of the fourth pulley and the groove of the fifth pulley are on the same vertical plane;
the elevator car comprises an elevator car, and is characterized in that a vertical central sleeve is arranged at the central axis position of the elevator car, the two ends of the central sleeve penetrate through the upper end surface and the lower end surface of the elevator car, the central sleeve is sleeved outside a supporting upright post, the upper end surface and the lower end surface of the elevator car are respectively provided with guide shoes in bilateral symmetry, the cross sections of the guide shoes are U-shaped, the guide shoes are sleeved on a sliding surface of a guide rail, the guide shoes play a vertical guiding role and a transverse limiting role on the elevator car, the elevator car is limited from horizontally shaking, meanwhile, the guide shoes cannot axially twist, collision in the operation process is avoided, brake calipers are symmetrically arranged on the elevator car, the brake calipers are sleeved on a brake surface of the guide rail;
a counterweight is arranged in the supporting upright post, a vertical left positioning hole and a vertical right positioning hole are arranged on the counterweight, a rope is connected with the upper end of the counterweight and is divided into a left rope and a right rope,
one end of a left rope is fixedly connected with the middle part of the upper end of the counterweight, passes through a left positioning hole of the counterweight downwards after passing through a third groove of a first pulley upwards from the counterweight, then passes through a right positioning hole of the counterweight upwards after passing through a first groove on a traction wheel of a traction machine, then passes through a second pulley, then passes through a third pulley along the horizontal direction, and then is connected with the left side of the upper end surface of the elevator car downwards,
one end of a right rope is fixedly connected with the middle part of the upper end of the counterweight, passes through a left positioning hole of the counterweight downwards after passing through a fourth groove of the first pulley upwards from the counterweight, then passes through a right positioning hole of the counterweight upwards after passing through a second groove on a traction sheave of the traction machine, then passes through a fourth pulley, then passes through a fifth pulley along the horizontal direction, and then is connected with the right side of the upper end surface of the elevator car downwards,
the left positioning hole and the right positioning hole play a vertical guiding role and a transverse limiting role on the counterweight, so that the horizontal shaking of the counterweight is limited, meanwhile, the counterweight cannot be twisted axially, the collision in the operation process is avoided, the counterweight is arranged in the supporting upright column, and the left rope and the right rope are arranged, so that the effect which can be achieved by the original two counterweights can be achieved by only using one counterweight;
the elevator car is provided with a double-leaf outward-opening elevator door, the elevator door comprises an entrance elevator door facing one side of the building and an entrance elevator door facing away from the building, the width of the entrance elevator door is equal to the distance from the elevator car to the building, and when the entrance elevator door is opened, a gap between the elevator car and the building can be blocked to prevent a resident from falling from the side.
The pulley block box is fixedly connected with the building through a pulley block box passageway pedal, the support stand columns can be reinforced through the pulley block box passageway pedal, and meanwhile, workers can also inspect and maintain the pulley blocks.
The bottom layer of elevator is provided with the ground guard room, the ground guard room is provided with towards the first floor access door of building and the last door of building dorsad, access door and last door are the push-and-pull door, and the width of going up the door of passenger elevator equals with the distance of elevator car to last door of passenger, when the last door of passenger elevator is opened, prevents that someone from going into in the ground guard room.
The cage and the ground protection chamber are made of transparent materials.
The maintenance hole has been seted up on the reinforced concrete foundation, the maintenance hole communicates with the cabin, and the staff can get into the cabin through the maintenance hole, maintains equipment.
The operation process comprises the following steps: when the door of the elevator car is opened at the bottommost layer, the pedal is put down firstly, then the door of the passenger elevator is opened, the ground protection room is blocked from two sides, then the door of the passenger elevator is opened, a resident can get in and out the elevator from the door of the passenger elevator, when the door of the passenger elevator is closed, the door of the passenger elevator is closed firstly, then the door of the passenger elevator is closed, and the pedal is folded;
the rope is driven by the traction machine to drive the elevator car to ascend, the pedal is put down after the elevator car reaches a specified floor, the entrance elevator door is opened, the entrance door located on the floor is opened, a resident can step on the pedal to enter and exit the elevator, meanwhile, the entrance elevator door can also block a gap between the elevator car and a building from two sides, and when the door is closed, the entrance door on the floor is closed firstly, then the entrance elevator door is closed, and the pedal is folded.
Claims (5)
1. The single-upright-column multi-storey building elevator with the traction machine arranged at the bottom is characterized by comprising a hollow supporting upright column, an elevator car and a base, wherein the base is buried under the ground and comprises a steel-concrete foundation and a cabin, the cabin is arranged right below the steel-concrete foundation, the traction machine is arranged in the cabin, a first groove and a second groove are formed in a traction wheel of the traction machine, and a buffer is arranged on the steel-concrete foundation;
the lower end of the supporting upright post is fixedly connected with the base, guide rails are arranged on two sides of the supporting upright post, the guide rail is of a step type, the step guide rail comprises a braking surface and a sliding surface which are staggered in steps, the upper end of the supporting upright post is provided with a pulley block box, the pulley block box is fixedly connected with the top floor of the building, a first pulley, a second pulley block and a third pulley block are arranged in the pulley block box, the first pulley is provided with a third groove and a fourth groove, the second pulley block comprises a second pulley and a third pulley, the third pulley block comprises a fourth pulley and a fifth pulley, the third groove of the first pulley, the first groove of the traction machine, the groove of the second pulley and the groove of the third pulley are on the same vertical plane, the fourth groove of the first pulley, the second groove of the traction machine, the groove of the fourth pulley and the groove of the fifth pulley are on the same vertical plane;
a vertical central sleeve is arranged at the central axis position of the elevator car, two ends of the central sleeve penetrate through the upper end surface and the lower end surface of the elevator car, the central sleeve is sleeved outside the supporting upright post, the upper end surface and the lower end surface of the elevator car are respectively provided with guide shoes in a bilateral symmetry manner, the cross sections of the guide shoes are U-shaped, the guide shoes are sleeved on the sliding surface of the guide rail, the elevator car is provided with brake calipers in a bilateral symmetry manner, and the brake calipers are sleeved on the brake surface of the guide rail;
a counterweight is arranged in the supporting upright post, a vertical left positioning hole and a vertical right positioning hole are arranged on the counterweight, a rope is connected with the upper end of the counterweight and is divided into a left rope and a right rope,
one end of a left rope is fixedly connected with the middle part of the upper end of the counterweight, passes through a left positioning hole of the counterweight downwards after passing through a third groove of a first pulley upwards from the counterweight, then passes through a right positioning hole of the counterweight upwards after passing through a first groove on a traction wheel of a traction machine, then passes through a second pulley, then passes through a third pulley along the horizontal direction, and then is connected with the left side of the upper end surface of the elevator car downwards,
one end of a right rope is fixedly connected with the middle part of the upper end of the counterweight, passes through a left positioning hole of the counterweight downwards after passing through a fourth groove of the first pulley upwards from the counterweight, then passes through a right positioning hole of the counterweight upwards after passing through a second groove on a traction sheave of the traction machine, then passes through a fourth pulley, then passes through a fifth pulley along the horizontal direction, and then is connected with the right side of the upper end surface of the elevator car downwards,
the elevator car is provided with a double-leaf outward-opening side-hung elevator door, the elevator door comprises an entrance elevator door facing one side of the building and an entrance elevator door facing the other side of the building, and the width of the entrance elevator door is equal to the distance between the elevator car and the building.
2. The single-column multi-storey building elevator with the traction machine arranged underneath according to claim 1, wherein the pulley block box is fixedly connected with a building through a pulley block box passageway pedal.
3. The single-column multi-storey building elevator with the lower traction machine as claimed in claim 1, wherein a ground protection room is arranged at the lowest floor of the elevator, the ground protection room is provided with a first-floor access door facing the building and a boarding door facing away from the building, the access door and the boarding door are both sliding doors, and the width of the boarding elevator door is equal to the distance from the elevator car to the boarding door.
4. The single-column multi-storey building elevator with the traction machine placed underneath according to claim 3, wherein the cage and the ground protection room are made of transparent materials.
5. The elevator for the single-column multi-storey building with the traction machine arranged underneath according to claim 1, wherein the steel-concrete foundation is provided with an access hole, and the access hole is communicated with a cabin.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019209446783 | 2019-06-21 | ||
| CN2019105450318 | 2019-06-21 | ||
| CN201910545031 | 2019-06-21 | ||
| CN201920944678 | 2019-06-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111792494A true CN111792494A (en) | 2020-10-20 |
| CN111792494B CN111792494B (en) | 2024-08-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112551314A (en) * | 2020-09-08 | 2021-03-26 | 郑州轻工业大学 | Single-upright-column elevator lifting system and elevator |
| CN112678651A (en) * | 2020-12-03 | 2021-04-20 | 毛红生 | Elevator for multi-storey residential improvement |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112551314A (en) * | 2020-09-08 | 2021-03-26 | 郑州轻工业大学 | Single-upright-column elevator lifting system and elevator |
| CN112678651A (en) * | 2020-12-03 | 2021-04-20 | 毛红生 | Elevator for multi-storey residential improvement |
| CN112678651B (en) * | 2020-12-03 | 2022-03-22 | 毛红生 | Elevator for multi-storey residential improvement |
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| CN210260777U (en) | 2020-04-07 |
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