CN111547639B - Manual elevating gear of building engineering - Google Patents
Manual elevating gear of building engineering Download PDFInfo
- Publication number
- CN111547639B CN111547639B CN202010396932.8A CN202010396932A CN111547639B CN 111547639 B CN111547639 B CN 111547639B CN 202010396932 A CN202010396932 A CN 202010396932A CN 111547639 B CN111547639 B CN 111547639B
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- Prior art keywords
- pulley
- special
- box
- shaped rotating
- box body
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- Expired - Fee Related
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- 230000003028 elevating effect Effects 0.000 title claims description 5
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 11
- 239000000725 suspension Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 9
- 206010066054 Dysmorphism Diseases 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
- B66D3/06—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage with more than one pulley
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
- B66D1/40—Control devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/54—Safety gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
- B66D3/06—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage with more than one pulley
- B66D3/10—Applications of braking or detent devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D2700/00—Capstans, winches or hoists
- B66D2700/02—Hoists or accessories for hoists
- B66D2700/026—Pulleys, sheaves, pulley blocks or their mounting
- B66D2700/028—Pulley blocks with multiple sheaves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D2700/00—Capstans, winches or hoists
- B66D2700/05—Brakes with mechanisms with latches for hoists or similar devices
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Emergency Lowering Means (AREA)
Abstract
The invention discloses a manual lifting device for construction engineering, which comprises a box body, two turning fixed pulleys and two pulley blocks, wherein the two turning fixed pulleys and the two pulley blocks are symmetrically fixed at the top of a wall body, two triangular suspension rods are symmetrically installed on the upper surface of the box body, a fixed wheel is installed on each triangular suspension rod, the two fixed wheels are respectively connected with the two pulley blocks in a hanging mode, and an adjusting rope is wound on each turning fixed pulley and the pulley block on the same side. According to the invention, the box body can be easily lifted by manpower through the pulley block, the box body can be lifted by fixed-point hovering through the matching of the inner ratchet wheel of the control box and the spring pawl, the safety is improved, the special-shaped rotating shaft is linked with the spring pawl through the connecting rope, the control box can be conveniently placed down, the danger caused by hand slip is avoided through the matching of the reset spring and the special-shaped rotating shaft, and the safety of the device is further improved.
Description
Technical Field
The invention relates to the field of constructional engineering, in particular to a manual lifting device for constructional engineering.
Background
In the building construction process, the scaffold frame construction needs the climbing, and is comparatively dangerous, therefore constructor need use elevating gear to be under construction to the wall body, reduces danger, and can improve work efficiency.
The existing lifting device is usually hoisted by a motor, a worker is needed to be matched to control the lifting device on the bottom surface, the labor force is increased, the controller is located in the lifting device and can not be accurately stopped at a required working position due to the fact that the controller is controlled by electric energy, the lifting device needs to be adjusted up and down for many times, and large electric energy is consumed.
Disclosure of Invention
The invention aims to solve the defects that the ground control increases labor force, is inconvenient, has poor internal control precision and consumes larger electric energy in the prior art, and provides a manual lifting device for construction engineering.
In order to achieve the purpose, the invention adopts the following technical scheme:
a manual lifting device for building engineering comprises a box body, two direction-changing fixed pulleys and two pulley blocks, wherein the two direction-changing fixed pulleys and the two pulley blocks are symmetrically fixed at the top of a wall body, two triangular hanging rods are symmetrically installed on the upper surface of the box body, a fixed wheel is installed on each triangular hanging rod, the two fixed wheels are respectively hung on the two pulley blocks, an adjusting rope is wound on each direction-changing fixed pulley and the pulley block on the same side together, two protection pipes are symmetrically inserted into the box body, a low-position pulley and a high-position pulley are respectively installed at the positions, located at pipe orifices, of the two protection pipes, of the lower bottom surface of the box body, a control box is embedded at the lower end of the box body, and the lower ends of the two adjusting;
the triangle jib can make the box stably hang through two tight pulleys, and the protection tube can protect the regulation rope, avoids adjusting the rope and is cut by construction apparatus in the box and injures and cause danger, and high-order pulley and low-order pulley can make two regulation rope levels penetrate the control box in, avoid taking place skew and produce the friction damage.
The roller is installed to the control box internal rotation, fixed cover is equipped with two reels on the roller, install interior ratchet on the inner wall of control box, the carousel is installed to the right-hand member of roller, the carousel is located the centre of interior ratchet, rotate on the carousel and install the spring pawl, and the spring pawl card is on interior ratchet, special-shaped rotary groove has been seted up to the centre of carousel, the special-shaped rotary groove internal rotation is inserted and is equipped with special-shaped pivot, two reset spring are installed to the symmetry between special-shaped pivot and the special-shaped rotary groove, the one end of special-shaped pivot extends to the outside of control box and installs the adjustment disk, special-shaped pivot and spring pawl install the connection rope jointly.
Preferably, each pulley block is sequentially divided into a first fixed pulley, a second fixed pulley, a first movable pulley and a second movable pulley from top to bottom, and the second movable pulley is connected with the fixed pulley;
the pulley block realizes a labor-saving structure through the first fixed pulley, the second fixed pulley, the first movable pulley and the second movable pulley, namely, the weight of the box body and a constructor is uniformly distributed on a plurality of strands of adjusting ropes, so that the pulling force required by pulling the box body and the constructor by the adjusting ropes is greatly reduced, and the box body and the constructor can be pulled manually;
the direction-changing fixed pulley changes the pulling direction of the adjusting rope of the pulley block, so that the box body can be conveniently pulled vertically.
Preferably, two wire holes are symmetrically formed in the side wall of the control box in a high-low mode, and the two adjusting ropes penetrate into the control box through the wire holes in the same side and are fixedly wound on the two reels;
the adjusting rope is wound on the reel, the reel can be controlled to rotate by rotating the roller shaft, the adjusting rope can be contracted by rotating the reel, the box body can be pulled to move upwards, the roller shaft needs to rotate the turntable, the spring pawl on the turntable can self-lock the turntable in the process of rotating the turntable, the phenomenon that the turntable pulls the adjusting rope by the gravity of the box body to enable the reel and the roller shaft to rotate reversely, the box body descends rapidly and accidents are avoided, and the safety of the device is improved;
the regulating disc is rotated in the forward direction to enable the special-shaped rotating shaft to rotate in the forward direction and push the rotating disc to rotate in the forward direction, the roller shaft and the reel rotate in the forward direction and pull the rope to pull the box body upwards, namely a constructor can stand in the box body to perform lifting operation without electric power control and ground control, the box body is slow in lifting speed and safe, the constructor can freely select a position and directly loosen the regulating disc to stop the box body, and the special-shaped rotating shaft box is simple and convenient to operate and accurate in control;
the special-shaped rotating shaft reversely rotates through the adjusting disc, the return spring is compressed, when the special-shaped rotating shaft reversely rotates, the spring pawl is pulled by the special-shaped rotating shaft through the connecting rope, the special-shaped rotating shaft does not clamp the inner ratchet wheel any more, namely, the reverse unlocking of the rotating disc is realized, the rotating disc can reversely rotate, the roll shaft and the reel reversely rotate to release the adjusting rope, the box body gradually descends, and after the regulating disc is positively rotated, the spring pawl is reset to clamp the inner ratchet wheel, so that the box body can be conveniently stopped at a certain position in the;
when the falling process is suddenly loosened, the reset spring pushes the special-shaped rotating shaft to rotate positively, so that the spring pawl can be locked on the inner ratchet wheel in time without being pulled by the connecting rope, the box body is prevented from falling rapidly to cause danger, and the safety of the device is further improved.
The invention has the following beneficial effects:
1. reach most laborsaving structure through the assembly pulley, change the direction of adjusting the rope through the diversion fixed pulley and make the rope of adjusting be connected with box and controller downwards, the constructor of being convenient for can control the operation in the box.
2. The reel through the control box is to adjusting the rope and carrying out the rolling and unreeling operation and reach the purpose of lift box, need not through ground control and need not to adopt electric control, reduces elevating gear's energy consumption and labour's input.
3. The rotary table is locked in the process of rotating and lifting the box body through the spring pawl and the inner ratchet wheel, so that the rotary table cannot rotate reversely, the box body cannot drop suddenly, the safety of the device is improved, in the manual rotating process, a proper place can be selected to stop rotating according to the construction position required by a constructor, the box body can be suspended at a certain position, and the control accuracy is improved.
4. Dysmorphism pivot is connected through being connected the rope with the spring pawl, then through being connected rope pulling spring pawl unblock carousel during dysmorphism pivot reversal, make the carousel can reverse, the constructor of being convenient for controls the box and moves down, increase the controllability of device, and through set up reset spring in the dysmorphism turn trough, can in time promote the connection rope that special-shaped pivot corotation loosened and dragged the spring pawl when making the dysmorphism pivot lose power suddenly, make the spring pawl can in time kick-back locking carousel, avoid danger, further increase the security of device.
In conclusion, the box body can be easily lifted manually through the pulley block, the box body can be lifted to hover at a fixed point through the matching of the inner ratchet wheel of the control box and the spring pawl, the box body can be conveniently placed down by the control box through the linkage of the special-shaped rotating shaft and the spring pawl through the connecting rope, the danger caused by hand slip is avoided through the matching of the reset spring and the special-shaped rotating shaft, and the safety of the device is further improved.
Drawings
Fig. 1 is a schematic structural diagram of a manual lifting device for construction engineering according to the present invention;
FIG. 2 is an enlarged view of a triangular suspender part of the manual lifting device for construction engineering, which is provided by the invention;
FIG. 3 is an enlarged view of a controller structure of a manual lifting device for construction engineering according to the present invention;
fig. 4 is an enlarged view of the inner ratchet wheel part of the manual lifting device for the construction engineering provided by the invention.
In the figure: the device comprises a box body 1, a triangular suspender 11, a 111 fixed wheel, a 12 low-position pulley, a 13 high-position pulley, a 14 protection pipe, a 2 direction-changing fixed pulley, a 3 pulley block, a 31 first fixed pulley, a 32 second fixed pulley, a 33 first movable pulley, a 34 second movable pulley, a 4 adjusting rope, a 5 control box, a 51 special-shaped rotating shaft, a 511 adjusting disc, a 512 connecting rope, a 52 roller shaft, a 521 reel, a 53 rotating disc, a 531 spring pawl, a 532 special-shaped rotating groove, a 533 return spring, a 54 inner ratchet wheel and a 55 line hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-4, a manual lifting device for building engineering comprises a box body 1, two direction-changing fixed pulleys 2 and two pulley blocks 3 symmetrically fixed on the top of a wall body, two triangular suspenders 11 are symmetrically installed on the upper surface of the box body 1, a fixed wheel 111 is installed on each triangular suspender 11, the two fixed wheels 111 are respectively hung on the two pulley blocks 3, an adjusting rope 4 is wound on each direction-changing fixed pulley 2 and the pulley block 3 on the same side together, two protection pipes 14 are symmetrically inserted in the box body 1, a low pulley 12 and a high pulley 13 are respectively installed at the positions, located at pipe orifices of the two protection pipes 14, of the lower bottom surface of the box body 1, a control box 5 is embedded at the lower end of the box body 1, and the lower ends of the two adjusting ropes 4 respectively penetrate through the low pulley 12 and the high pulley 13 and penetrate;
The roller shaft 52 is rotatably mounted in the control box 5, two reels 521 are fixedly sleeved on the roller shaft 52, an inner ratchet wheel 54 is mounted on the inner wall of the control box 5, a turntable 53 is mounted at the right end of the roller shaft 52, the turntable 53 is located in the middle of the inner ratchet wheel 54, a spring pawl 531 is rotatably mounted on the turntable 53, the spring pawl 531 is clamped on the inner ratchet wheel 54, a special-shaped rotating groove 532 is formed in the middle of the turntable 53, a special-shaped rotating shaft 51 is inserted in the special-shaped rotating groove 532 in a rotating mode, two reset springs 533 are symmetrically mounted between the special-shaped rotating shaft 51 and the special-shaped rotating groove 532, one end of the special-shaped rotating shaft 51 extends to the outer side of the control box 5 and is provided.
Each pulley block 3 is sequentially divided into a first fixed pulley 31, a second fixed pulley 32, a first movable pulley 33 and a second movable pulley 34 from top to bottom, and the second movable pulley 34 is connected with a fixed pulley 111;
the pulley block 3 realizes a labor-saving structure through the first fixed pulley 31, the second fixed pulley 32, the first movable pulley 33 and the second movable pulley 34, namely, the weight of the box body 1 and the weight of a constructor are uniformly distributed on the multi-strand adjusting rope 4, so that the pulling force required by the constructor and the box body 1 pulled by the adjusting rope 4 is greatly reduced, and the constructor can be pulled by manpower;
the direction-changing fixed pulley 2 changes the pulling direction of the adjusting rope of the pulley block 3, so that the box body 1 can be conveniently pulled vertically.
Two wire holes 55 are symmetrically formed in the side wall of the control box 5 in a high-low mode, and the two adjusting ropes 4 penetrate into the control box 5 through the wire holes 55 on the same side and are fixedly wound on the two reels 521;
the adjusting rope 4 is wound on the reel 521, the rotating roller 52 can control the reel 521 to rotate and contract the adjusting rope 4, namely the box body 1 can be pulled to move upwards, the roller 52 rotates to rotate the rotating disc 53, the spring pawl 531 on the rotating disc 53 can self-lock the rotating disc 53 in the process of rotating the rotating disc 53, and the phenomenon that the rotating disc 53 rotates the adjusting rope 4 due to the gravity of the box body 1 to pull the reel 521 and the roller 52 to rotate reversely, so that the box body 1 descends rapidly to cause accidents is avoided, and the safety of the device is improved;
the adjusting disc 511 is rotated in the forward direction to enable the special-shaped rotating shaft 51 to rotate in the forward direction and push the rotating disc 53 to rotate in the forward direction, the roller shaft 52 and the reel 521 rotate in the forward direction and pull the adjusting rope 4 to pull the box body 1 upwards, namely a constructor can stand in the box body 1 to perform lifting operation without power control and ground control, the box body 1 is slow in lifting speed and safe, the constructor can freely select a position and directly loosen the adjusting disc 511 to stop the box body 1, and the operation is simple and convenient, and the control is accurate;
the special-shaped rotating shaft 51 rotates reversely by the reverse rotation adjusting disc 511 and compresses the return spring 533, and when the special-shaped rotating shaft 51 rotates reversely, the spring pawl 531 is pulled by the connecting rope 512 to enable the spring pawl 531 not to clamp the inner ratchet wheel 54 any more, namely, the reverse unlocking of the rotating disc 53 is realized, so that the rotating disc 53 can rotate reversely, the roller shaft 52 and the reel 521 rotate reversely to release the adjusting rope 4, so that the box body gradually descends, and after the forward rotation adjusting disc 511 rotates reversely, the spring pawl 531 resets to clamp the inner ratchet wheel 54, so that the box body can be stopped at a certain position in the descending process;
when the hand is suddenly released in the descending process, the return spring 533 pushes the special-shaped rotating shaft 51 to rotate forwards, so that the spring pawl 531 can be clamped on the inner ratchet wheel 54 in time without being pulled by the connecting rope 512 to rebound quickly, danger caused by rapid falling of the box body 1 is avoided, and the safety of the device is further improved.
When the device is used, the adjusting disc 511 is rotated forwards, so that the special-shaped rotating shaft 51 pushes the rotating disc 53 to rotate forwards through the special-shaped rotating groove 532, the roller shaft 52 and the reel 521 rotate forwards, the adjusting rope 4 is collected on the reel 521, the box body 1 is pulled to move upwards through the pulley block 3, the spring pawl 531 rotates forwards to sweep the inner ratchet wheel 54, when the rotation is stopped, the influence of the gravity of the box body 1 is received, the box body 1 pulls the adjusting rope 4 to be drawn out from the reel 521, the roller shaft 52 rotates backwards to enable the rotating disc to rotate backwards, the spring pawl 531 is locked on the inner ratchet wheel 54 in a reverse rotation mode, the rotating disc 53 is prevented from rotating backwards, namely the box body 1 is suspended after the forward rotation is stopped, the suspension position of the box body 1 is accurately controlled;
when the dial 511 is rotated reversely, the abnormal rotation shaft 51 compresses the return spring 533 and pushes the rotation plate 53 to rotate reversely through the abnormal rotation slot 532, when the special-shaped rotating shaft 51 rotates reversely, the spring pawl 531 is pulled by the connecting rope 512 to be away from the inner ratchet wheel 54 for unlocking, so that the turntable 53 can rotate reversely, the turntable 53 rotates reversely to make the reel 521 rotate reversely and put the box body 1 downwards through the adjusting rope 4, the constructor can control the box body 1 to descend conveniently, and the adjusting disk 511 is rotated forward, the abnormal-shaped rotating shaft 51 releases the connecting rope 512 so that the spring pawl 531 can rebound and lock on the inner ratchet wheel 54, namely, the suspension device can still hover at a fixed point in the descending process, and when the constructor slips and looses hands suddenly, the return spring 533 can push the special-shaped rotating shaft 51 to rotate forwards, the connecting rope 512 is loosened, the spring pawl 531 rebounds and locks, danger caused by rapid falling of the box body 1 is avoided, and the safety of the device is further improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (3)
1. The utility model provides a manual elevating gear of building engineering, includes that box (1), symmetry fix two diversion fixed pulleys (2) and two assembly pulleys (3) at wall body top, a serial communication port, two triangle jib (11) are installed to the upper surface symmetry of box (1), every all install tight pulley (111), two on triangle jib (11) tight pulley (111) articulates with two assembly pulleys (3) respectively, every on diversion fixed pulley (2) and assembly pulley (3) of homonymy coiling jointly there is regulation rope (4), box (1) internal symmetry is inserted and is equipped with two protection tubes (14), low pulley (12) and high pulley (13) are do not installed in the mouth of pipe punishment that the lower bottom surface of box (1) is located two protection tubes (14), and the lower extreme of box (1) inlays and is equipped with control box (5), two the lower extreme of adjusting rope (4) is passed low pulley (12) and high pulley (13) respectively and is gone through low pulley (13) and high pulley (13) Penetrating into the control box (5);
the special-shaped rotating shaft is characterized in that a roller shaft (52) is rotatably mounted in the control box (5), two reels (521) are fixedly sleeved on the roller shaft (52), an inner ratchet wheel (54) is mounted on the inner wall of the control box (5), a rotating disc (53) is mounted at the right end of the roller shaft (52), the rotating disc (53) is positioned in the middle of the inner ratchet wheel (54), a spring pawl (531) is rotatably mounted on the rotating disc (53), the spring pawl (531) is clamped on the inner ratchet wheel (54), a special-shaped rotating groove (532) is formed in the middle of the rotating disc (53), a special-shaped rotating shaft (51) is rotatably inserted in the special-shaped rotating groove (532), two reset springs (533) are symmetrically mounted between the special-shaped rotating shaft (51) and the special-shaped rotating groove (532), one end of the special-shaped rotating shaft (51) extends to the outer side of the control box (5) and is provided with an adjusting disc (511), and, when the special-shaped rotating shaft (51) rotates reversely, the spring pawl (531) is pulled by the connecting rope (512) to be far away from the inner ratchet wheel (54) for unlocking.
2. A manual lifting device for building engineering according to claim 1, characterized in that each pulley block (3) is divided into a first fixed pulley (31), a second fixed pulley (32), a first movable pulley (33) and a second movable pulley (34) from top to bottom, and the second movable pulley (34) is connected with the fixed pulley (111).
3. The manual lifting device for building engineering according to claim 1, characterized in that two wire holes (55) are symmetrically formed in the side wall of the control box (5) in a high-low manner, and the two adjusting ropes (4) are respectively threaded into the control box (5) through the wire holes (55) on the same side and are fixedly wound on the two reels (521).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010396932.8A CN111547639B (en) | 2020-05-12 | 2020-05-12 | Manual elevating gear of building engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010396932.8A CN111547639B (en) | 2020-05-12 | 2020-05-12 | Manual elevating gear of building engineering |
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| Publication Number | Publication Date |
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| CN111547639A CN111547639A (en) | 2020-08-18 |
| CN111547639B true CN111547639B (en) | 2021-07-16 |
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| CN202010396932.8A Expired - Fee Related CN111547639B (en) | 2020-05-12 | 2020-05-12 | Manual elevating gear of building engineering |
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| CN113071720B (en) * | 2021-03-24 | 2022-08-30 | 哈尔滨工业大学 | Rope slow-release device is shifted to saddlebag |
| CN113350705B (en) * | 2021-06-24 | 2022-08-02 | 江苏省肿瘤医院 | Position fixer and radiotherapy body frame for radiotherapy |
| CN113911952B (en) * | 2021-10-29 | 2023-04-25 | 中车哈尔滨车辆有限公司 | Lifting device for mobile platform vehicle |
| CN114014127A (en) * | 2021-12-07 | 2022-02-08 | 苏州德奥电梯有限公司 | Flat-bed anti-sliding device of car elevator |
| CN114888823B (en) * | 2022-05-17 | 2024-12-17 | 上海桦灿医疗器械有限公司 | Wire-controlled differential lifting rotary driving device |
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| Publication number | Publication date |
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| CN111547639A (en) | 2020-08-18 |
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