CN111807287A - Hand-operated elevator capable of being stopped emergently in case of failure - Google Patents
Hand-operated elevator capable of being stopped emergently in case of failure Download PDFInfo
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- CN111807287A CN111807287A CN202010785529.4A CN202010785529A CN111807287A CN 111807287 A CN111807287 A CN 111807287A CN 202010785529 A CN202010785529 A CN 202010785529A CN 111807287 A CN111807287 A CN 111807287A
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- cavity
- lifting
- block
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- face
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
- B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
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- 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
- B66D1/02—Driving gear
- B66D1/04—Driving gear manually operated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
- B66F17/006—Safety devices, e.g. for limiting or indicating lifting force for working platforms
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses a hand-operated lifter capable of emergency stop in case of failure, which comprises a lifter body, wherein a lifting cavity with an upward opening is arranged in the lifter body, a lifting column capable of moving up and down is arranged in the lifting cavity, the upper end surface of the lifting column extends to the outer side above the lifter body and is fixedly provided with a lifting platform, the lower side of the left end surface of the lifting platform is fixedly provided with the rotating connecting shaft, the invention achieves the effect of saving energy by driving the lifting machine to lift by hand cranking, and the invention has the advantages of convenient movement and no need of a motor to provide kinetic energy, thereby ensuring very convenient work, the fixed position of the elevator after being positioned is combined with the tire brake at the same time, so that the stability of the device is obviously improved, and the lifting platform has high stability, the problem of some device faults can be overcome, and the safety coefficient of workers is improved by the effect of realizing emergency stop and slow descent in the instant in the process of emergency falling of the lifting platform.
Description
Technical Field
The invention relates to the technical field of elevators, in particular to a hand-operated elevator capable of being stopped emergently in case of failure.
Background
In our daily life, the lift is as a fitment or the multi-functional mechanical equipment of rescue usefulness, often divide into different forms according to the usage of difference, the lift of fitment usefulness that usually small-size was used, often all the structure is small and exquisite to the lift of hand formula, it is comparatively inconvenient that its lift removes construction position fixed position, and lift live time one can lead to inner structure not hard up, the structure of general hand formula lift is unstable, sudden failure also can lead to constructor's injury when the construction. The present invention sets forth a device that solves the above problems.
Disclosure of Invention
The technical problem is as follows: hand formula lift needs fixed position when removing to operating position, and general lift goes up and down unstablely, and can not accomplish fine emergency stop effect when breaking down and can lead to personnel to be injured.
In order to solve the problems, the embodiment designs a hand-operated elevator capable of being stopped emergently by failure, the hand-operated elevator capable of being stopped emergently by failure comprises an elevator body, an ascending and descending cavity with an upward opening is arranged in the elevator body, an ascending and descending column capable of moving up and down is arranged in the ascending and descending cavity, the upper end surface of the ascending and descending column extends to the outer side above the elevator body and is fixedly provided with an elevating platform, a rotating connecting shaft is fixedly arranged on the lower side of the left end surface of the elevating platform, a telescopic extension ladder is fixedly connected with the excircle end surface of the rotating connecting shaft, a connecting cavity is communicated with the left side of the ascending and descending cavity, a threaded rod is rotatably arranged between the upper wall and the lower wall of the connecting cavity, an ascending and descending connecting block capable of moving up and down and connected with the threaded rod is arranged in the connecting cavity, the, the inner part of the connecting cavity is provided with a wire wheel cavity, the inner part of the wire wheel cavity is provided with a hand-operated device which provides power for the rotation of the threaded rod, the inner part of the wire wheel cavity is provided with a centrifugal cavity which is positioned in the lower wall of the lifting cavity, the centrifugal cavity is provided with a switching mechanism, the lower end of the outer wall of the lifting machine body is fixedly provided with a fixed block, the fixed block is internally provided with four brake cavities which are same in size and communicated with the outer wall in a front-back and left-right symmetrical manner, the brake cavities are internally provided with movable brake blocks, one end of each brake block close to the center of the lifting machine body is fixedly connected with a brake stay cord, one section of each brake block close to the center of the lifting machine body is fixedly connected with a brake spring close to the end of the center of the lifting machine body, the tire-free lifting mechanism is characterized in that tires are fixedly connected to two end faces of the supporting plate far away from the rotating shaft, three supporting blocks with the same size are symmetrically arranged on the upper end face of the right side of the lifting machine body and the upper end faces of the front side and the rear side of the lifting machine body, four fixing mechanisms with the same mechanism are arranged on the upper sides of the supporting blocks, telescopic cavities with outward openings are symmetrically arranged on the front end face, the rear end face, the left end face and the right end face of the lifting machine body in a communicated mode, four switch mechanisms with the same mechanism.
But preferably, hand cranking device locates including rotating the driven line wheel of line intracavity right wall, threaded rod lower extreme downwardly extending to line wheel intracavity and fixed connection in driven line wheel axle center, line wheel intracavity left wall rotates and is equipped with the initiative line wheel, the initiative line wheel with around the steel wire strip that is equipped with certain rigidity between the driven line wheel, rotate on line wheel intracavity left side between the lower wall be equipped with fixed connection in the initiative pivot in initiative line wheel axle center, the initiative pivot upwards extends to lift organism upper end and fixedly connected with carousel, mountain end face fixedly connected with is used for handheld rotation handrail.
Preferably, the rear end face of the lifting column is fixedly provided with a fixed rack, the upper side of the rear wall of the lifting cavity is communicated with a rotating cavity, a meshing gear meshed with the fixed rack is rotatably arranged in the rotating cavity, and the axis of the left end face of the meshing gear is fixedly connected with a transmission rotating shaft.
Preferably, a belt wheel cavity is formed in the left wall of the rotating cavity, the left end face of the transmission rotating shaft extends to the left side of the belt wheel cavity and is fixedly connected with a driving belt wheel, a driven belt wheel is arranged on the lower wall of the belt wheel cavity in a rotating mode, a belt is wound between the driving belt wheel and the driven belt wheel, a driving rotating shaft is fixedly connected with the axis of the right end face of the driven belt wheel, an engaging cavity is formed in the lower side of the right wall of the belt wheel cavity, the driving rotating shaft extends to the right side of the engaging cavity and is fixedly connected with a driving bevel gear, a driven bevel gear meshed with the driving bevel gear is arranged on the rear wall of the engaging cavity. The centrifugal chamber is characterized in that a gear chamber is arranged in the back wall of the meshing chamber and located in the upper wall of the centrifugal chamber, the rotating shaft extends to the back of the rotating shaft and is fixedly provided with a meshing bevel gear, the lower wall in the gear chamber rotates to be provided with a transmission bevel gear meshed with the transmission bevel gear, and a transmission shaft is fixedly connected to the axis of the lower end face of the transmission bevel gear.
Preferably, the switching mechanism includes a centrifugal wheel rotatably disposed in the centrifugal cavity, a lower end surface of the transmission shaft extends downward into the centrifugal cavity and is fixedly connected to an axis of an upper end surface of the centrifugal wheel, an outer circle end surface of the centrifugal wheel is communicated with the axis of the centrifugal wheel, an annular rectangle is provided with moving cavities with the same size, a movable block capable of sliding is arranged in each moving cavity, a centrifugal spring is fixedly connected between one end of each moving block close to the axis of the centrifugal wheel and one end surface of each moving cavity close to the axis of the centrifugal wheel, a movable plate which is bilaterally symmetric about the centrifugal wheel and capable of moving left and right is arranged in each centrifugal cavity, and a pushing block is fixedly arranged on.
Preferably, be equipped with bilateral symmetry's slip chamber in the centrifugal chamber left and right sides two walls, the left and right sides slip chamber is close to a centrifugal chamber end wall with the intercommunication is equipped with the fixture block groove between the centrifugal chamber left and right sides two walls, the left and right sides promote the piece and keep away from centrifugal wheel one end extends to in the fixture block groove, it can shift up the elevator that removes to be equipped with in the slip chamber, the elevator up end with fixedly connected with supporting spring between the slip chamber upper wall, terminal surface fixedly connected with fixture block stay cord under the elevator, the elevator is close to the fixed fixture block that is equipped with of centrifugal chamber one end terminal surface, the left and right sides fixed fixture block is close to centrifugal chamber one end terminal surface extends to respectively in the fixture block groove.
Preferably, the front wall and the rear wall of the lifting cavity are located and communicated with an emergency stop cavity which is symmetrical in the front and rear direction and is arranged above the rotating cavity, an emergency stop plate capable of moving back and forth is arranged in the emergency stop cavity, the emergency stop plate is close to the end surface of one end of the lifting cavity, the end surface of the lifting cavity is rough in surface, the emergency stop plate is far away from an emergency stop pull rope fixedly connected with one end surface of the lifting cavity, the emergency stop pull rope is connected with the left side of the clamping block pull rope, the emergency stop pull rope is connected with the right side of the clamping block pull rope, and the emergency stop plate is far away from one end surface of the lifting cavity and the emergency stop.
Preferably, the switch mechanism comprises a movable clamping block which is positioned in the telescopic cavity and can slide, one side end surface of the movable clamping block, which is close to the center of the elevator body, is fixedly connected with an active pull rope, the active pull ropes are respectively connected with the active pull rope on the front side, the rear side, the left side and the right side of the movable clamping block, a telescopic spring is fixedly connected between one side end surface of the movable clamping block, which is close to the center of the elevator body, and one side end wall of the telescopic cavity, which is close to the center of the elevator body, is connected with the movable clamping block, the movable clamping block extends outwards to the outer side of the elevator body, a supporting clamping block is fixedly arranged on the end surface of the outer wall of the elevator body, a rotary clamping shaft is rotatably arranged at one end of the supporting clamping block, which is, the lower end of the pushing block is abutted against the upper end face of the movable clamping block.
Preferably, the fixing mechanism comprises a fixing rod hinged to the supporting block, a fixing hole penetrating through the fixing rod is formed in the lower wall of the fixing rod, a stabilizing plate is fixedly arranged on the upper end face of the fixing rod, three fixing plates fixedly connected with the upper end face of the lifter body are fixedly arranged on one side, away from the center of the lifter body, of the supporting block, and clamping holes penetrating through the fixing plate in the front and at the back and having the same size as the fixing hole are formed in the upper end of each fixing plate.
The invention has the beneficial effects that: the invention achieves the effect of saving energy by driving the elevator to ascend and descend by hand cranking, is convenient to move and does not need a motor to provide kinetic energy, the fixed position of the elevator after being positioned is combined with the tire brake at the same time, so that the stability of the device is obviously improved, the stability of the lifting platform is high, the problems of some device faults can be overcome, and the effect of sudden stop and slow descent can be instantly achieved in the process of emergency falling of the lifting platform, so that the safety coefficient of workers is improved.
Drawings
For ease of illustration, the invention is described in detail by the following specific examples and figures.
Fig. 1 is a schematic view of the overall structure of a hand-operated elevator capable of emergency stop in case of failure according to the present invention;
FIG. 2 is a schematic view of the structure in the direction "A-A" of FIG. 1;
FIG. 3 is a schematic view of the structure in the direction "B-B" of FIG. 2;
FIG. 4 is an enlarged view of the structure of "C" of FIG. 1;
FIG. 5 is an enlarged view of the structure of "D" of FIG. 1;
fig. 6 is an enlarged view of the structure of "E" of fig. 2.
Detailed Description
The invention will now be described in detail with reference to fig. 1-6, for ease of description, the orientations described below will now be defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.
The invention relates to a hand-operated elevator capable of being emergently stopped in failure, which comprises an elevator body 11, wherein an elevating cavity 24 with an upward opening is arranged in the elevator body 11, an elevating column 29 capable of moving up and down is arranged in the elevating cavity 24, the upper end surface of the elevating column 29 extends to the outer side above the elevator body 11 and is fixedly provided with an elevating platform 31, the lower side of the left end surface of the elevating platform 31 is fixedly provided with a rotating connecting shaft 32, the outer circle end surface of the rotating connecting shaft 32 is fixedly connected with a telescopic extension ladder 33, the left side in the elevating cavity 24 is communicated with a connecting cavity 28, a threaded rod 27 is rotatably arranged between the upper wall and the lower wall in the connecting cavity 28, an elevating connecting block 34 capable of moving up and down and connected with the threaded rod 27 through threads is arranged in the connecting cavity 28, the right end surface of the elevating connecting block 34 is fixedly connected with the lower side of the left end surface of the elevating, the utility model discloses a lifting mechanism of elevator, it is characterized in that be equipped with hand cranking device 101 in line wheel chamber 39, hand cranking device 101 is the threaded rod 27 rotates and provides power, just be located in line wheel chamber 39 lower wall be equipped with centrifugal chamber 43 in the 24 lower walls in lift chamber, be equipped with switching mechanism 102 in centrifugal chamber 43, the fixed block 13 that is equipped with of lift organism 11 outer wall lower extreme, the bilateral symmetry all around is equipped with four brake chambers 15 that the size is the same and communicate with the outer wall in the fixed block 13, be equipped with movable brake block 16 in the brake chamber 15, brake block 16 is close to lift organism 11 center one end fixedly connected with brake stay cord 12, brake block 16 is close to lift organism 11 center one section with brake chamber 15 is close to lift organism 11 center one end fixedly connected with brake spring 14, lift organism 11 lower extreme wall all around bilateral symmetry is equipped with four backup pads, the inner lower side of the supporting plate 19 is provided with a rotating shaft 17 in a penetrating and rotating mode, two end faces of the supporting plate 19 are far away from the rotating shaft 17 and fixedly connected with tires 18, the upper end face of the right side of the elevator body 11 and the upper end faces of the front side and the rear side of the elevator body 11 are fixedly and symmetrically provided with three supporting blocks 85 with the same size, the upper sides of the supporting blocks 85 are provided with four fixing mechanisms 103 with the same mechanism, the front end face, the rear end face, the left end face, the right end face, the front end face, the rear end face, the left end face, the right.
Beneficially, the hand cranking device 101 includes a driven wire wheel 35 rotatably disposed on the right wall in the wire wheel cavity 39, the lower end surface of the threaded rod 27 extends downward into the wire wheel cavity 39 and is fixedly connected to the axis of the driven wire wheel 35, the left wall in the wire wheel cavity 39 is rotatably disposed with a driving wire wheel 41, a steel wire strip 42 with a certain rigidity is wound between the driving wire wheel 41 and the driven wire wheel 35, a driving rotating shaft 38 fixedly connected to the axis of the driving wire wheel 41 is rotatably disposed between the upper and lower walls on the left side in the wire wheel cavity 39, the driving rotating shaft 38 extends upward to the upper end of the elevator body 11 and is fixedly connected with a turntable 36, and the hill end surface is fixedly connected with a rotating handrail 37 for holding.
Advantageously, a fixed rack 73 is fixedly arranged on the rear end surface of the lifting column 29, a rotating cavity 70 is communicated with the upper side of the rear wall of the lifting cavity 24, a meshing gear 71 meshed with the fixed rack 73 is rotatably arranged in the rotating cavity 70, and a transmission rotating shaft 72 is fixedly connected to the axle center of the left end surface of the meshing gear 71.
Beneficially, a belt wheel cavity 81 is arranged in the left wall of the rotating cavity 70, the left end face of the transmission rotating shaft 72 extends leftwards into the belt wheel cavity 81 and is fixedly connected with a driving belt wheel 80, the lower wall in the belt wheel cavity 81 is rotatably provided with a driven belt wheel 78, a belt 79 is wound between the driving belt wheel 80 and the driven belt wheel 78, the right end face of the driven belt wheel 78 is fixedly connected with a driving rotating shaft 77, the lower side in the right wall of the belt wheel cavity 81 is provided with an engaging cavity 75, the driving rotating shaft 77 extends rightwards into the engaging cavity 75 and is fixedly connected with a driving bevel gear 76, the rear wall in the engaging cavity 75 is rotatably provided with a driven bevel gear 74 engaged with the driving bevel gear 76, and the rear end face of the driven bevel gear 74 is fixedly connected with a rotating shaft 83. The rear wall of the meshing cavity 75 is provided with a gear cavity 47 in the upper wall of the centrifugal cavity 43, the rotating shaft 83 extends backwards to the gear cavity 47 and is fixedly provided with a meshing bevel gear 46, the lower wall of the gear cavity 47 is rotatably provided with a transmission bevel gear 45 meshed with the transmission bevel gear 45, and the lower end surface axis of the transmission bevel gear 45 is fixedly connected with a transmission shaft 44.
Beneficially, the switching mechanism 102 includes a centrifugal wheel 48 rotatably disposed in the centrifugal cavity 43, the lower end surface of the transmission shaft 44 extends downward into the centrifugal cavity 43 and is fixedly connected to the axis of the upper end surface of the centrifugal wheel 48, the outer circumferential end surface of the centrifugal wheel 48 is communicated and is provided with a moving cavity 49 with the same size in an annular rectangular shape, a movable block 57 capable of sliding is disposed in the moving cavity 49, a centrifugal spring 58 is fixedly connected between one end of the movable block 57 close to the axis of the centrifugal wheel 48 and one end surface of the moving cavity 49 close to the axis of the centrifugal wheel 48, a moving plate 50 which is bilaterally symmetric about the centrifugal wheel 48 and capable of moving left and right is disposed in the centrifugal cavity 43, and a pushing block 56 is fixedly disposed on one side end surface of the.
Beneficially, sliding cavities 52 which are symmetrical left and right are arranged in the left and right walls of the centrifugal cavity 43, clamping block grooves 51 are communicated between the end wall of the sliding cavity 52 on the left and right sides, which is close to the centrifugal cavity 43, and the left and right walls of the centrifugal cavity 43, one end of the pushing block 56 on the left and right sides, which is far away from the centrifugal wheel 48, extends into the clamping block groove 51, an ascending and descending block 54 which can move upwards is arranged in the sliding cavity 52, a supporting spring 53 is fixedly connected between the upper end surface of the ascending and descending block 54 and the upper wall of the sliding cavity 52, a clamping block pull rope 55 is fixedly connected to the lower end surface of the ascending and descending block 54, one end surface of the ascending and descending block 54, which is close to the centrifugal cavity 43, is fixedly provided with a fixed clamping block 82, and the end surfaces of the.
Beneficially, front and rear symmetrical emergency stop cavities 67 are formed in the front and rear walls of the lifting cavity 24 and above the rotating cavity 70, an emergency stop plate 68 capable of moving back and forth is arranged in the emergency stop cavity 67, the end surface of the emergency stop plate 68 close to one end of the lifting cavity 24 is rough, an emergency stop pull rope 69 is fixedly connected to the end surface of the emergency stop plate 68 far away from one end of the lifting cavity 24, the emergency stop pull rope 69 on the front side is connected with the fixture pull rope 55 on the left side, the emergency stop pull rope 69 on the rear side is connected with the fixture pull rope 55 on the right side, and an emergency stop spring 66 is fixedly connected between the end surface of one end of the emergency stop plate 68 far away from the lifting cavity 24 and the wall surface of one end of the emergency stop cavity.
Advantageously, the switch mechanism 104 includes a movable block 62 slidably disposed in the telescopic cavity 63, an active pull rope 65 is fixedly connected to an end surface of the movable block 62 near a center of the elevator body 11, the active pull ropes 65 are respectively connected to the front side, the rear side, the left side and the right side of the movable block 62, a telescopic spring 64 is fixedly connected between an end surface of the movable block 62 near the center of the elevator body 11 and an end wall of the telescopic cavity 63 near the center of the elevator body 11, the movable block 62 extends outward to an outer side of the elevator body 11, a support block 60 is fixedly disposed on an end surface of an outer wall of the elevator body 11 and above the movable block 62, a rotary block shaft 84 is rotatably disposed at an end of the support block 60 away from the center of the elevator body 11, a snap plate 59 is fixedly connected to an outer side of the rotary block shaft 84, and a snap plate spring is fixedly connected between an end surface of the snap plate And the lower end of the pushing block 56 is abutted against the upper end surface of the movable clamping block 62 by a spring 61.
Advantageously, the fixing mechanism 103 includes a fixing rod 25 hinged to the supporting block 85, a fixing hole 23 penetrating through the lower wall of the fixing rod 25 in the front-rear direction is provided, a stabilizing plate 26 is fixedly provided on the upper end surface of the fixing rod 25, three fixing plates 20 fixedly connected to the upper end surface of the elevator body 11 are fixedly provided on the side of the supporting block 85 away from the center of the elevator body 11, and a clamping hole 21 penetrating through the upper end of the fixing plate 20 in the front-rear direction and having the same size as the fixing hole 23 is provided.
The use steps of a hand-operated elevator capable of emergency stop in failure in the present document are described in detail below with reference to fig. 1 to 6: in the initial state, the brake block 16 is located at one side close to the symmetry center, the lifting column 29 is located at the lower limit position, the lifting block 54 is located at the upper limit position, the pushing block 56 is located at one side close to the symmetry center, the moving block 57 is located at one side close to the rotation center, and the quick-stop plate 68 is located at one side close to the symmetry center.
When the elevator is fixed, the elevator is pushed to a proper working position, the moving clamping blocks 62 on the front side, the rear side, the left side and the right side are respectively pressed inwards, at the moment, the moving clamping blocks 62 overcome the elastic force of the telescopic springs 64 to move inwards, at the moment, the tensioned driving pull rope 65 loosens, at the moment, the brake pull rope 12 is not tensioned, at the moment, the brake block 16 moves outwards due to the elastic force of the brake spring 14 and respectively clamps the four rotating shafts 17 to rotate so as to achieve the braking effect, at the moment, the moving clamping blocks 62 do not collide with the clamping plates 59 due to the inward movement, at the moment, the clamping plates 59 start to rotate downwards due to the elastic force of the clamping plate springs 61 and finally reach the vertical downward position, the effect of clamping the moving clamping blocks 62 so as not to move outwards is achieved, the braking effect is achieved, at the moment, the front side, at this time, because the fixing hole 23 at the lower end of the rotating fixing rod 25 is parallel to the clamping hole 21, the iron block with the corresponding size is clamped into the hole to achieve the effect of fixing the fixing rod 25, so that the elevator is fixed more stably.
When the lifting operation is started, the rotating handle 37 is held by hand and starts to rotate, at the moment, the rotating handle 37 drives the rotating disc 36 to rotate, the rotating disc 36 drives the driving wire wheel 41 to rotate through the driving rotating shaft 38, the driving wire wheel 41 gradually winds to the outer circle end face of the driving wire wheel 41 through the steel wire strip 42 when rotating and simultaneously drives the driven wire wheel 35 to rotate, at the moment, the driven wire wheel 35 drives the threaded rod 27 to rotate, the threaded rod 27 drives the lifting connecting block 34 to start to ascend through threaded connection, at the moment, the lifting connecting block 34 drives the lifting column 29 to start to ascend, the lifting column 29 drives the lifting table 31 to gradually rotate and ascend, at the moment, the lifting table 31 ascends to drive the extension ladder 33 to ascend, when the lifting table ascends to a proper position, the rotating handle 37 stops rotating, and the lifting column 29 ascends stably because the threaded rod 27 is in threaded connection.
When the elevator is out of order, if the steel wire 42 is broken, the lifting platform 31 will not drop suddenly, when the lifting connecting block 34 is broken due to too large bearing gravity, at this time, the lifting column 29 begins to drop freely, at this time, the lifting column 29 drives the fixed rack 73 to drop rapidly, the fixed rack 73 drives the meshing gear 71 to rotate rapidly due to the gear connection with the meshing gear 71, at this time, the meshing gear 71 drives the driving pulley 80 to rotate through the driving shaft 72, the driving pulley 80 drives the driven pulley 78 to rotate through the belt 79, the driven pulley 78 drives the driving bevel gear 76 to rotate through the driving shaft 77, the driving bevel gear 76 drives the driven bevel gear 74 to rotate to drive the rotating shaft 83 to rotate, the rotating shaft 83 rotates the pending transmission bevel gear 45 through the driving gear cavity 47, the transmission bevel gear 45 drives the centrifugal wheel 48 to rotate through the transmission shaft 44, at this time, the speed, at this time, the transmission shaft 44 drives the centrifugal cavity 43 to instantly grab at high speed, the centrifugal cavity 43 rotates to drive the moving block 57 to move outwards against the gravity of the centrifugal spring 58 and abut against the moving plate 50, and drive the left and right moving plates 50 to move away from the side of the centrifugal wheel 48, at this time, the moving plate 50 moves to drive the pushing block 56 to move away from the side of the centrifugal wheel 48 and abut against the fixed latch 82, at this time, the pushing block 56 in the fixed latch 82 abuts against and moves into the sliding cavity 52, at this time, the lifting block 54 instantly drops downwards due to the action of gravity and the elastic force of the supporting spring 53 and loosens the left and right latch pull ropes 55, at this time, the left and right latch pull ropes 69 loosen, at this time, the scram plate 68 instantly moves towards the side close to the lifting column 29 and abuts against the left and right end surfaces of the lifting column 29 due to the elastic force of the scram spring 66, so as, if the worker or the object weighed at the upper end of the lifting platform 31 is heavy, an obvious slow-descending effect can be achieved, and the safety coefficient of the worker operation is improved.
The invention has the beneficial effects that: the invention achieves the effect of saving energy by driving the elevator to ascend and descend by hand cranking, is convenient to move and does not need a motor to provide kinetic energy, the fixed position of the elevator after being positioned is combined with the tire brake at the same time, so that the stability of the device is obviously improved, the stability of the lifting platform is high, the problems of some device faults can be overcome, and the effect of sudden stop and slow descent can be instantly achieved in the process of emergency falling of the lifting platform, so that the safety coefficient of workers is improved.
In the above manner, a person skilled in the art can make various changes depending on the operation mode within the scope of the present invention.
Claims (9)
1. The utility model provides a hand formula lift that can trouble emergency stop, includes the lift organism, its characterized in that: a lifting cavity with an upward opening is arranged in the lifting machine body, a lifting column capable of moving up and down is arranged in the lifting cavity, the upper end face of the lifting column extends to the outer side above the lifting machine body and is fixedly provided with a lifting table, the lower side of the left end face of the lifting table is fixedly provided with a rotary connecting shaft, the excircle end face of the rotary connecting shaft is fixedly connected with a telescopic extension ladder, the left side in the lifting cavity is communicated with a connecting cavity, a threaded rod is rotatably arranged between the upper wall and the lower wall in the connecting cavity, a lifting connecting block capable of moving up and down and connected with the threaded rod in a threaded manner is arranged in the connecting cavity, the right end face of the lifting connecting block is fixedly connected with the lower side of the left end face of the lifting column, a wire wheel cavity is arranged in the lower wall of the connecting cavity, a hand-operated device is arranged in the wire wheel cavity, the centrifugal cavity is internally provided with a switching mechanism, the lower end of the outer wall of the elevator body is fixedly provided with a fixed block, four brake cavities which are same in size and communicated with the outer wall are symmetrically arranged in the fixed block in the front-back and left-right directions, a movable brake block is arranged in the brake cavity, one end of the brake block close to the center of the elevator body is fixedly connected with a brake pull rope, one section of the brake block close to the center of the elevator body is fixedly connected with a brake spring, one end of the brake cavity close to the center of the elevator body is fixedly connected with the brake spring, the lower end wall of the lower end of the elevator body is symmetrically arranged in the front-back and left-right directions, four support plates which are same in size are arranged on the lower side in the support plates in a penetrating and rotating manner, tires are fixedly, the lifting mechanism is characterized in that four fixing mechanisms with the same mechanism are arranged on the upper side of the supporting block, the front end face, the rear end face, the left end face and the right end face of the lifting machine body are symmetrical and communicated with telescopic cavities with outward openings, four switch mechanisms with the same mechanism are arranged in the telescopic cavities, and the switch mechanisms control the brake block to move left and right.
2. A hand-operated elevator capable of emergency stop in case of failure as claimed in claim 1, wherein: hand cranking device locates including rotating the driven line wheel of line intracavity right wall, the terminal surface downwardly extending under the threaded rod take turns intracavity and fixed connection in driven line wheel axle center, line wheel intracavity left wall rotates and is equipped with initiative line wheel, initiative line wheel with around the steel wire strip that is equipped with certain rigidity between the driven line wheel, it is equipped with fixed connection to rotate between the lower wall on the left side of line wheel intracavity in the initiative pivot in initiative line wheel axle center, the initiative pivot upwards extends to lift organism upper end and fixedly connected with carousel, mountain end face fixedly connected with is used for handheld rotation handrail.
3. A hand-operated elevator capable of emergency stop in case of failure as claimed in claim 1, wherein: the lifting column is characterized in that a fixed rack is fixedly arranged on the rear end face of the lifting column, a rotating cavity is communicated with the upper side of the rear wall of the lifting cavity, a meshing gear meshed with the fixed rack is rotatably arranged in the rotating cavity, and a transmission rotating shaft is fixedly connected to the axis of the left end face of the meshing gear.
4. A hand-operated elevator capable of emergency stop in case of failure as claimed in claim 3, wherein: a belt wheel cavity is arranged in the left wall of the rotating cavity, the left end face of the transmission rotating shaft extends leftwards into the belt wheel cavity and is fixedly connected with a driving belt wheel, a driven belt wheel is arranged in the belt wheel cavity in a rotating manner, a belt is wound between the driving belt wheel and the driven belt wheel, the axle center of the right end face of the driven belt wheel is fixedly connected with a driving rotating shaft, a meshing cavity is arranged at the lower side in the right wall of the belt wheel cavity, the driving rotating shaft extends rightwards into the meshing cavity and is fixedly connected with a driving bevel gear, a driven bevel gear meshed with the driving bevel gear is arranged in the rear wall of the meshing cavity in a rotating manner, the axle center of the rear end face of the driven bevel gear is fixedly connected with a rotating shaft, a gear cavity is arranged in the rear wall of the meshing cavity and is positioned in the upper wall of the centrifugal cavity, the rotating shaft extends backwards into, and the axis of the lower end surface of the transmission bevel gear is fixedly connected with a transmission shaft.
5. A hand-operated elevator capable of emergency stop in case of failure as claimed in claim 1, wherein: the switching mechanism is located including rotating the centrifugation wheel in the centrifugation intracavity, the terminal surface downwardly extending of transmission shaft in the centrifugation intracavity and fixed connection in centrifugation wheel up end axle center, centrifugation wheel excircle terminal surface intercommunication and annular rectangle are equipped with the removal chamber that the size is the same, it is equipped with the movable block that can slide to remove the intracavity, the movable block is close to centrifugation wheel axle center one end with it is close to remove the chamber fixedly connected with centrifugation spring between the centrifugation wheel axle center one end terminal surface, be equipped with in the centrifugation chamber about the movable plate that the centrifugation wheel bilateral symmetry just can remove about, the movable plate is kept away from a side end of centrifugation wheel is fixed to be equipped with and promotes the piece.
6. A hand-operated elevator capable of emergency stop in case of failure as claimed in claim 5, wherein: the centrifugal impeller comprises a centrifugal cavity, a centrifugal wheel, a lifting block, a clamping block groove, a clamping block pull rope, a fixed clamping block and a fixed clamping block, wherein bilaterally symmetrical sliding cavities are arranged in the left wall and the right wall of the centrifugal cavity, the sliding cavities are close to one end wall of the centrifugal cavity and the left wall and the right wall of the centrifugal cavity, the clamping block groove is communicated and arranged between the left wall and the right wall of the centrifugal cavity, the left side and the right side of the centrifugal cavity, the pushing block is far away from one end of the centrifugal wheel and extends to the inside of the clamping block groove, the lifting block is internally provided with the lifting block capable of moving upwards, the upper end face of the lifting.
7. A hand-operated elevator capable of emergency stop in case of failure as claimed in claim 1, wherein: the emergency stop device comprises a lifting cavity, a rotating cavity, an emergency stop plate, a fixture block pull rope, a lifting cavity, a fixture block pull rope and an emergency stop spring, wherein the front wall and the rear wall of the lifting cavity are communicated with and are symmetrically arranged in the front and the rear of the rotating cavity, the emergency stop plate is arranged above the rotating cavity, the emergency stop plate can move back and forth, the emergency stop plate is close to the end face of one end of the lifting cavity, the end face of one end of the lifting cavity is rough in surface, the emergency stop plate is far away from the end face of one end of the lifting cavity, the emergency stop pull rope is fixedly connected with the emergency stop pull rope, the front side of the emergency stop pull rope is.
8. A hand-operated elevator capable of emergency stop in case of failure as claimed in claim 1, wherein: the switch mechanism comprises a movable fixture block which is positioned in the telescopic cavity and can slide, one side end surface of the movable fixture block, which is close to the center of the elevator body, is fixedly connected with an active pull rope, the active pull ropes are respectively connected with the front side, the rear side, the left side and the right side of the movable fixture block, one side end surface of the movable fixture block, which is close to the center of the elevator body, and one side end wall of the telescopic cavity, which is close to the center of the elevator body, are fixedly connected with a telescopic spring, the movable fixture block extends outwards to the outer side of the elevator body, a support fixture block is fixedly arranged on the end surface of the outer wall of the elevator body, which is positioned above the movable fixture block, one end of the support fixture block, which is far away from the center of the elevator body, the lower end of the pushing block is abutted against the upper end face of the movable clamping block.
9. A hand-operated elevator capable of emergency stop in case of failure as claimed in claim 1, wherein: the fixing mechanism comprises a fixing rod hinged to the supporting block, a fixing hole penetrating through the fixing rod is formed in the lower wall of the fixing rod, a stabilizing plate is fixedly arranged on the upper end face of the fixing rod, three fixing plates fixedly connected with the upper end face of the lifter body are fixedly arranged on one side, away from the center of the lifter body, of the supporting block, and clamping holes which penetrate through the fixing plate in the front and back direction and are the same as the fixing hole in size are formed in the upper end of each fixing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010785529.4A CN111807287A (en) | 2020-08-06 | 2020-08-06 | Hand-operated elevator capable of being stopped emergently in case of failure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010785529.4A CN111807287A (en) | 2020-08-06 | 2020-08-06 | Hand-operated elevator capable of being stopped emergently in case of failure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111807287A true CN111807287A (en) | 2020-10-23 |
Family
ID=72863073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010785529.4A Withdrawn CN111807287A (en) | 2020-08-06 | 2020-08-06 | Hand-operated elevator capable of being stopped emergently in case of failure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111807287A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112408285A (en) * | 2020-11-28 | 2021-02-26 | 周琼 | Welding system suitable for high-altitude operation |
-
2020
- 2020-08-06 CN CN202010785529.4A patent/CN111807287A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112408285A (en) * | 2020-11-28 | 2021-02-26 | 周琼 | Welding system suitable for high-altitude operation |
| CN112408285B (en) * | 2020-11-28 | 2021-10-15 | 阜宁木森铸件有限公司 | Welding system suitable for high-altitude operation |
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Application publication date: 20201023 |