CN111439708B - Manual descending device and lifting system of lifting equipment - Google Patents
Manual descending device and lifting system of lifting equipment Download PDFInfo
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- CN111439708B CN111439708B CN202010340853.5A CN202010340853A CN111439708B CN 111439708 B CN111439708 B CN 111439708B CN 202010340853 A CN202010340853 A CN 202010340853A CN 111439708 B CN111439708 B CN 111439708B
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- lifting
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- swing rod
- guide rod
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- 230000007246 mechanism Effects 0.000 claims abstract description 32
- 230000000149 penetrating effect Effects 0.000 claims abstract description 9
- 239000004744 fabric Substances 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 7
- 235000014676 Phragmites communis Nutrition 0.000 claims description 6
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000003028 elevating effect Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 244000089486 Phragmites australis subsp australis Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
-
- 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
- B66F13/00—Common constructional features or accessories
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Combinations Of Kitchen Furniture (AREA)
- Emergency Lowering Means (AREA)
Abstract
The invention relates to the technical field of wind power and buildings, and provides a manual descending device and a lifting system of lifting equipment. The manual descent device includes: the mounting seat is longitudinally provided with a first through hole in a penetrating mode, and the mounting seat is provided with a guide rod extending horizontally; a limiting block is formed at the top of the push rod; the lower part of the push rod is slidably inserted into the first through hole; the side wall of the top of the swing rod is rotationally connected with one end of a connecting shaft, and the other end of the connecting shaft is used for being connected with a lock rod of a lifting mechanism of lifting equipment; the lower part of the swing rod is provided with a bar-shaped hole penetrating the guide rod, the outer side of the guide rod is sleeved with a spring, and the spring is used for driving the bottom end of the swing rod to be separated from a limiting block of the push rod; one end of the pull rope is connected with the lower part of the swing rod, and the other end of the pull rope suspends the protection plate below the bottom plate of the lifting device through the pulley block; the stay cord is used for driving the pendulum rod bottom and contradicts on the stopper of push rod. The invention can realize the safe landing of the lifting equipment when power is off, and provides effective guarantee for the safety of staff.
Description
Technical Field
The invention relates to the technical field of wind power and buildings, in particular to a manual descending device and a lifting system of lifting equipment.
Background
At present, high-altitude operation is generally required in the wind power generation field and the building field, and lifting equipment is required for conveying personnel materials and overhauling between a high-altitude operation surface and the ground. Lifting equipment generally includes the railway carriage or compartment body, elevating system, operating panel and electric cabinet, and elevating system passes through the roof beam to be fixed at the top of railway carriage or compartment body, and elevating system provides power for whole lifting equipment, and operating panel installs on the inner wall of railway carriage or compartment body, and operating panel and elevating system all are connected with the electric cabinet electricity.
Under normal conditions, a worker controls the lifting mechanism to be opened and closed by operating the operation panel, so that the lifting equipment can move up and down. But when the electric cabinet is powered off, the lifting mechanism is locked, and the lifting equipment stops running. At this time, the worker needs to manually pull down the lock rod of the lifting mechanism to release the locking of the lifting mechanism, so that the lifting mechanism drives the carriage body to safely fall to the stopping platform. Because the specific condition below the lifting device can not be observed when the lifting device is manually controlled by a worker to fall, if an obstacle exists below the lifting device, and the lifting device is not locked by the worker in time, the lifting device can strike the obstacle below the lifting device, so that the life safety of the worker in the carriage body is threatened.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art or related art. Therefore, the invention provides a manual descending device of lifting equipment, which aims to solve the problem that the lifting equipment cannot stop in time when encountering an obstacle during power failure.
The invention also provides a lifting system.
A manual descent apparatus of a lifting device according to an embodiment of a first aspect of the present invention includes:
The mounting seat is used for being mounted on a top plate of the lifting equipment; the mounting seat is longitudinally provided with a first through hole in a penetrating mode, the mounting seat is provided with a guide rod extending horizontally, and the guide rod is arranged above the first through hole;
A limiting block is formed at the top of the push rod; the lower part of the push rod is slidably inserted into the first through hole;
The side wall of the top of the swing rod is rotationally connected with one end of a connecting shaft, and the other end of the connecting shaft is used for being connected with a lock rod of a lifting mechanism of the lifting equipment; the lower part of the swing rod is provided with a strip-shaped hole for penetrating the guide rod, the outer side of the guide rod is sleeved with a spring, the spring is positioned between the swing rod and the fixed end of the guide rod, and the free end of the guide rod is provided with a limiting part; the spring is used for driving the bottom end of the swing rod to be separated from a limiting block of the push rod;
One end of the pull rope is connected with the lower part of the swing rod, and the other end of the pull rope suspends the protection plate below the bottom plate of the lifting device through the pulley block; the stay cord is used for driving the pendulum rod bottom is contradicted on the stopper of push rod.
According to the manual descending device of the lifting equipment, when the electric cabinet of the lifting equipment is powered off, the bottom end of the swing rod is driven to rotate to the position right above the push rod by utilizing the gravity of the protection plate, and a worker can unlock the lifting mechanism of the lifting equipment by pushing the push rod upwards; when the lifting equipment encounters an obstacle in the falling process, the pushing force applied by the push rod to the swing rod is relieved by utilizing the spring to drive the bottom end of the swing rod to separate from the limiting block of the push rod, so that the lock rod of the lifting mechanism is automatically locked. Therefore, the manual descending device can realize the safe landing of the lifting equipment when power is off, avoid the lifting equipment from being crashed, and provide effective guarantee for the safety of staff in the lifting equipment.
In addition, the manual descending device of the lifting device according to the embodiment of the invention can also have the following additional technical characteristics:
According to one embodiment of the invention, a limit sleeve is sleeved on the outer side of the guide rod, the limit sleeve is positioned between the guide rod and the spring, and one end, close to the swing rod, of the limit sleeve is positioned right above the limit block.
According to one embodiment of the invention, the bottom end of the swing rod is rotatably provided with a rolling element.
According to one embodiment of the invention, the lifting device further comprises an alarm electrically connected with the electric cabinet of the lifting device, a trigger plate extending outwards is formed on the side wall of the push rod below the top plate, a micro switch is fixed on the side wall of the mounting seat, an action reed of the micro switch is located on the moving stroke of the trigger plate, and the micro switch is electrically connected with the electric cabinet of the lifting device.
According to one embodiment of the invention, the mounting seat comprises a U-shaped base and a vertical plate, one end of the vertical plate is connected with the U-shaped base, the other end of the vertical plate extends upwards and protrudes out of the top surface of the U-shaped base, the first through hole is formed in the U-shaped base, and the guide rod is fixed on the upper portion of the vertical plate.
According to one embodiment of the invention, a limit trigger assembly is arranged between the bottom plate and the protection plate, the limit trigger assembly comprises a support, a connecting rod and a limit switch, the support is fixed on the bottom plate, the first end of the connecting rod is rotationally connected with the support, the second end of the connecting rod extends towards the protection plate, the limit switch is arranged at the second end of the connecting rod, and the limit switch is electrically connected with an electric cabinet of the lifting equipment.
According to one embodiment of the invention, the end face of the first end of the connecting rod is a bevel for interference fit with the base plate.
According to one embodiment of the invention, the pulley block comprises a plurality of pulley seats and pulleys in one-to-one correspondence with the pulley seats, the pulley seats are used for being fixed on a coaming or a bottom plate of the lifting equipment, the pulleys are rotatably arranged on the pulley seats, and the pull rope is wound on the pulleys.
According to one embodiment of the invention, the circumference of the protection plate is provided with flexible cloth, and the flexible cloth is used for being connected with the side wall of the bottom plate.
According to a second aspect of the present invention, a lifting system includes a lifting device, where the lifting device includes an electric cabinet, a lifting mechanism electrically connected to the electric cabinet, and a carriage surrounded by a top plate, a coaming, and a bottom plate, and the lifting mechanism is disposed above the top plate, and further includes a manual descent device of the lifting device.
The above technical solutions in the embodiments of the present invention have at least one of the following technical effects:
The invention has the advantages of convenient operation and high safety, and the staff can directly push the push rod upwards after power failure, and the swing rod is pushed to move upwards along with the push rod in the upward movement process of the push rod. The top end of the swing rod is connected with the lock rod of the lifting mechanism through the connecting shaft, so that the lock rod of the lifting mechanism can be pushed open when the swing rod moves upwards, the locking of the lifting mechanism is released, and the lifting mechanism can drive the lifting equipment to move downwards. If there is an obstacle below the lifting device, the protection plate is lifted by the obstacle when the lifting device touches the obstacle during the downward movement. At this time, the pulling force exerted by the protection plate on the swing rod through the pull rope disappears, the top end of the swing rod rotates anticlockwise around the connecting shaft under the drive of the spring force, the lower part of the swing rod slides towards the free end of the guide rod, and the bottom end of the swing rod is separated from the limiting block of the push rod. At this time, the swing rod loses the thrust exerted by the push rod on the swing rod, and the lock rod of the lifting mechanism is automatically locked. Therefore, the lifting equipment can be rapidly suspended, the lifting equipment is prevented from being damaged by collision, and effective guarantee is provided for the safety of staff in the lifting equipment.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive pulling for a person skilled in the art.
FIG. 1 is a schematic front view of a manual lowering device of a lifting apparatus in an embodiment of the invention;
FIG. 2 is a schematic partial rear view of a manual lowering device of a lifting apparatus in accordance with an embodiment of the present invention;
FIG. 3 is a partial perspective view of a manual lowering device of a lifting apparatus in accordance with an embodiment of the present invention;
FIG. 4 is a schematic structural view of a manual descending device of a lifting apparatus when no obstacle is touched in an embodiment of the present invention;
FIG. 5 is a schematic view of a manual descending device of a lifting apparatus when an obstacle is touched in an embodiment of the present invention;
FIG. 6 is a schematic view of a mounting base according to an embodiment of the present invention;
FIG. 7 is a schematic front view of a manual lowering device of another lifting apparatus in accordance with an embodiment of the present invention;
FIG. 8 is a schematic diagram of a limit trigger assembly according to an embodiment of the present invention;
FIG. 9 is a schematic view of a pulley block according to an embodiment of the invention;
FIG. 10 is a schematic view of the structure of a carriage according to an embodiment of the present invention;
FIG. 11 is a partial perspective view of a lifting system in accordance with an embodiment of the present invention;
FIG. 12 is a partial front view of a lifting system in accordance with an embodiment of the present invention;
Fig. 13 is a schematic front view of a lifting system according to an embodiment of the present invention.
Reference numerals:
1: swing rod; 1.1: a first bar-shaped hole; 2: a push rod; 2.1: a limiting block;
2.2: a trigger plate; 3: a mounting base; 3.1: a U-shaped base; 3.1.1: a first through hole;
3.1.2: perforating; 3.2: a vertical plate; 3.3: an abrasion-proof sheet; 4: a pull rope; 5: a lifting mechanism;
6: a guide rod; 6.1: a limit part; 7: a spring; 8: a protection plate; 9.1: a pulley;
9.2: a pulley seat; 9.3: a bolt; 9.4: a spacer bush; 10: a connecting shaft;
11: a rolling member; 12: a micro-switch; 12.1: an action reed; 13.1: a support;
13.2: a connecting rod; 13.3: a limit switch; 14: a flexible cloth; 15.1: a top plate;
15.2: a bottom plate; 15.3: coaming plate; 15.4: a ring frame; 16: a guide rope;
17: a limit trigger switch; 18: and (5) constructing a frame.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments in the invention, which a person of ordinary skill in the art would obtain without making any inventive pull, are within the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the apparatus or component referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.
In embodiments of the invention, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Referring to fig. 1 to 6, an embodiment of the present invention provides a manual lowering device of a lifting apparatus, where the manual lowering device includes a mounting base 3, a push rod 2, a swing rod 1 and a pull rope 4, the mounting base 3 is used for being mounted on a top plate 15.1 of the lifting apparatus, the mounting base 3 is longitudinally penetrated and provided with a first through hole 3.1.1, the mounting base 3 is provided with a horizontally extending guide rod 6, and the guide rod 6 is disposed above the first through hole 3.1.1; a limiting block 2.1 is formed at the top of the push rod 2, and the lower part of the push rod 2 is slidably inserted into the first through hole 3.1.1; the side wall of the top of the swing rod 1 is rotationally connected with one end of a connecting shaft 10, and the other end of the connecting shaft 10 is used for being connected with a lock rod of a lifting mechanism 5 of lifting equipment; the lower part of the swing rod 1 is provided with a strip-shaped hole for penetrating the guide rod 6, the outer side of the guide rod 6 is sleeved with a spring 7, the spring 7 is positioned between the swing rod 1 and the fixed end of the guide rod 6, and the free end of the guide rod 6 is provided with a limit part 6.1; the spring 7 is used for driving the bottom end of the swing rod 1 to be separated from the limiting block 2.1 of the push rod 2; one end of the pull rope 4 is connected with the lower part of the swing rod 1, and the other end of the pull rope suspends the protection plate 8 below the bottom plate 15.2 of the lifting device through the pulley block; the stay cord 4 is used for driving pendulum rod 1 bottom to contradict on the stopper 2.1 of push rod 2. It should be noted that, the fixed end of the guide rod 6 is the end of the guide rod 6 connected to the mounting seat 3, whereas the free end of the guide rod 6 is the end of the guide rod 6 far away from the mounting seat 3.
When in installation: firstly, a through hole for penetrating the push rod 2 is formed in a top plate 15.1 of the lifting equipment; then, fixing the mounting seat 3 on the top plate 15.1 of the lifting device through bolts; then, the push rod 2 is inserted into the first through hole 3.1.1 of the mounting seat 3, and at the moment, the limiting block 2.1 is abutted against the top surface of the mounting seat 3 due to the existence of the limiting block 2.1, so that the push rod 2 cannot penetrate out of the first through hole 3.1.1 to be separated from the mounting seat 3; next, the lower part of the swing rod 1 is connected to the mounting seat 3 through the guide rod 6, and the top end of the swing rod 1 is connected with the lock rod of the lifting mechanism 5 through the connecting shaft 10; next, the pulley block is fixed to the case of the lifting device, and the pull rope 4 is wound around the pulley block.
After the installation is completed, the gravity of the protection plate 8 is transmitted to the lower part of the swing rod 1 through the pull rope 4, the top end of the swing rod 1 rotates clockwise around the connecting shaft 10 under the pulling of the pull rope 4, the lower part of the swing rod 1 slides towards the fixed end of the guide rod 6, and meanwhile, as the lower part of the swing rod 1 gradually approaches the fixed end of the guide rod 6, the spring 7 positioned between the swing rod 1 and the fixed end of the guide rod 6 is continuously compressed. As shown in fig. 4, when the pulling force applied by the pull rope 4 to the swing rod 1 is greater than the elastic force of the spring 7, the bottom end of the swing rod 1 just abuts against the limiting block 2.1 of the push rod 2.
Therefore, after power failure, the staff can directly push the push rod 2 upwards. At this time, the bottom end of the swing rod 1 just abuts against the limiting block 2.1 of the push rod 2, so that the swing rod 1 is pushed to move upwards along with the push rod 2 in the upward moving process. The top end of the swing rod 1 is connected with the lock rod of the lifting mechanism 5 through the connecting shaft 10, so that the lock rod of the lifting mechanism 5 can be pushed open when the swing rod 1 moves upwards, the locking of the lifting mechanism 5 is released, and the lifting mechanism 5 can drive the lifting equipment to move downwards. As shown in fig. 5, if there is an obstacle below the lifting device, the shielding plate 8 is lifted by the obstacle when the lifting device touches the obstacle during the downward movement of the lifting device. At this time, the pulling force applied to the swing rod 1 by the protection plate 8 through the pull rope 4 disappears, the top end of the swing rod 1 rotates anticlockwise around the connecting shaft 10 under the driving of the elastic force of the spring 7, the lower part of the swing rod 1 slides towards the free end of the guide rod 6, and the bottom end of the swing rod 1 is separated from the limiting block 2.1 of the push rod 2. At this time, the swing rod 1 loses the thrust exerted by the push rod 2 on the swing rod, and the lock rod of the lifting mechanism 5 is automatically locked. Therefore, the lifting equipment can be rapidly suspended, the lifting equipment is prevented from being damaged by collision, and effective guarantee is provided for the safety of staff in the lifting equipment.
In order to avoid the spring 7 being excessively compressed, a limiting sleeve is sleeved on the outer side of the guide rod 6 and is positioned between the guide rod 6 and the spring 7, that is, the limiting sleeve and the spring 7 are sequentially sleeved on the guide rod 6 from inside to outside, and one end, close to the swing rod 1, of the limiting sleeve is positioned right above the limiting block 2.1. Therefore, in the process that the pull rope 4 pulls the lower part of the swing rod 1 to slide towards the fixed end of the guide rod 6, the lower part of the swing rod 1 gradually approaches the limit sleeve. When the swing rod 1 is propped against the end part of the limiting sleeve, the swing rod 1 cannot slide towards the fixed end of the guide rod 6 continuously under the constraint of the length of the limiting sleeve, and at the moment, the bottom end of the swing rod 1 is located right above the limiting block 2.1. Of course, in order to reduce the friction resistance between the bottom end of the swing rod 1 and the limiting block 2.1, the bottom end of the swing rod 1 is rotatably provided with a rolling element 11. Wherein the rolling elements 11 may be, but are not limited to, rolling bearings or rolling wheels.
As shown in fig. 3, the transverse cross section of the swing rod 1 is in a U shape, the top end of the swing rod 1 is provided with a first bar-shaped hole 1.1 extending along the length direction of the swing rod 1, the first bar-shaped hole 1.1 is used for installing a connecting shaft 10, and the bar-shaped hole at the lower end of the swing rod 1 also extends along the length direction of the parallel swing rod 1, so that the lower part of the swing rod 1 can not interfere with the guide rod 6 and the up-down movement of the swing rod 1 can be ensured when the swing rod 1 rotates around the connecting shaft 10.
As shown in fig. 2, the manual descending device further comprises an alarm electrically connected with the electric cabinet of the lifting device, a trigger plate 2.2 extending outwards is formed on the side wall of the push rod 2 below the top plate 15.1, a micro switch 12 is fixed on the side wall of the mounting seat 3, an action reed 12.1 of the micro switch 12 is located on the moving stroke of the trigger plate 2.2, and the micro switch 12 is electrically connected with the electric cabinet of the lifting device. In the process that the push rod 2 pushes the swing rod 1 to move upwards, the trigger plate 2.2 of the push rod 2 triggers the action reed 12.1 of the micro switch 12. Based on the feedback signal from the micro-switch 12, the electric cabinet will turn on the alarm through the self-contained standby battery to alert the staff around the operation channel of the lifting device. The warning device can be, but not limited to, a warning lamp, a buzzer or a warning device with both the warning lamp and the buzzer.
As shown in fig. 6, the mounting base 3 includes a U-shaped base 3.1 and a vertical plate 3.2, one end of the vertical plate 3.2 is connected with the U-shaped base 3.1, the other end of the vertical plate 3.2 extends upward and protrudes out of the top surface of the U-shaped base 3.1, the U-shaped base 3.1 is provided with a first through hole 3.1.1, and the guide rod 6 is fixed on the upper portion of the vertical plate 3.2. In order to accommodate the micro-switch 12, the opening of the U-shaped base 3.1 faces to the side, that is, two opposite faces of the U-shaped base 3.1 are horizontally arranged to serve as the top face and the bottom face of the U-shaped base 3.1 respectively, the micro-switch 12 is arranged between the top face and the bottom face of the U-shaped base 3.1, the top face and the bottom face of the U-shaped base 3.1 are provided with first through holes 3.1.1, and the bottom face of the U-shaped base 3.1 is also provided with through holes 3.1.2 for penetrating the action reeds 12.1. As shown in fig. 2, in order to reduce the loss of the U-shaped base 3.1 during the movement of the push rod 2, the top and bottom surfaces of the U-shaped base 3.1 are provided with wear plates 3.3 coaxial with the first through holes 3.1.1.
Referring to fig. 7 and 8, in consideration of the fact that the lifting device may suddenly come into call during the descending process, in order to improve reliability, two means of electric control and mechanical control may be simultaneously adopted, so a limit trigger assembly is disposed between the bottom plate 15.2 and the protection plate 8, the limit trigger assembly includes a support 13.1, a connecting rod 13.2 and a limit switch 13.3, the support 13.1 is fixed on the bottom plate 15.2, a first end of the connecting rod 13.2 is rotationally connected with the support 13.1, a second end of the connecting rod 13.2 extends towards the protection plate 8, the limit switch 13.3 is disposed at a second end of the connecting rod 13.2, and the limit switch 13.3 is electrically connected with an electric cabinet of the lifting device. When an obstacle is touched during the downward movement of the lifting device, the protective plate 8 is lifted, i.e. the protective plate 8 moves towards the floor 15.2 of the lifting device under the influence of the obstacle. When the protection plate 8 touches the limit switch 13.3, if the call is made, the electric cabinet of the lifting device controls the lifting mechanism 5 to lock according to the feedback signal of the limit switch 13.3, so that the lifting device can be rapidly suspended. If the call is not yet made, the protection plate 8 continues to move upwards, so that the connecting rod 13.2 is pushed to rotate, and the limit switch 13.3 is prevented from being broken. Meanwhile, the swing rod 1 can be separated from the limiting block 2.1 under the drive of the spring 7, the swing rod 1 loses the thrust exerted by the push rod 2 on the swing rod, and the lock rod of the lifting mechanism 5 is automatically locked.
Further, the end surface of the first end of the connecting rod 13.2 is an inclined surface, and the inclined surface is used for being in interference fit with the bottom plate 15.2, that is, the connecting rod 13.2 is kept in an inclined state under the combined action of the gravity of the connecting rod and the acting force exerted by the support 13.1 on the connecting rod, so that the connecting rod 13.2 is prevented from being clamped between the support 13.1 and the protection plate 8 and being unable to rotate in the upward moving process of the protection plate 8.
As shown in fig. 9, the pulley block comprises a plurality of pulley seats 9.2 and pulleys 9.1 corresponding to the pulley seats 9.2 one by one, the pulley seats 9.2 are used for being fixed on a coaming 15.3 or a bottom plate 15.2 of the lifting equipment, the pulleys 9.1 are rotatably arranged on the pulley seats 9.2, and the pull ropes 4 are wound on the pulleys 9.1. The pulley 9.1 is rotatably mounted on the pulley mount 9.2 by means of a screw 9.3. In addition, in order to avoid friction between the end face of the pulley 9.1 and the pulley seat 9.2, a spacer bush 9.4 is sleeved on the bolt 9.3, and the spacer bush 9.4 is positioned between the pulley 9.1 and the pulley seat 9.2.
As shown in fig. 8, in order to avoid the shield plate 8 from rotating or swaying, a flexible cloth 14 is provided around the periphery of the shield plate 8, the flexible cloth 14 being adapted to be connected to the side walls of the bottom plate 15.2. Wherein, the flexible cloth 14 has a certain thickness, and when guard plate 8 runs into the obstacle, flexible cloth 14 takes place deformation under the drive of guard plate 8, and flexible cloth 14 can not restrict guard plate 8 to the bottom plate 15.2 motion of lifting device.
Referring to fig. 10 to 13, the embodiment of the present invention further provides a lifting system, where the lifting system includes a lifting device and a manual descending device of the lifting device, the lifting device includes an electric cabinet, a lifting mechanism 5 electrically connected to the electric cabinet, and a box body surrounded by a top plate 15.1, a coaming 15.3, and a bottom plate 15.2, and the lifting mechanism 5 is disposed above the top plate 15.1. In addition, the upper edge of roof 15.1 is fixed with circle frame 15.4, and the top of railway carriage or compartment body is suspended to have and is constructed the frame 18, is connected with guide rope 16 on the frame 18, and bounding wall 15.3 is provided with the installed part that is used for wearing to establish guide rope 16, is equipped with limit trigger switch 17 on the guide rope 16. It should be noted that, the electric cabinet, the warning device, the carriage body, the lifting mechanism 5 and the limit trigger switch 17 all belong to the prior art, and the structure and principle thereof are not repeated here.
Finally, it should be noted that: the above embodiments are only for illustrating the technical scheme of the invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be appreciated by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the invention.
Claims (8)
1. A manual lowering device for a lifting apparatus, comprising:
The mounting seat is used for being mounted on a top plate of the lifting equipment; the mounting seat is longitudinally provided with a first through hole in a penetrating mode, the mounting seat is provided with a guide rod extending horizontally, and the guide rod is arranged above the first through hole;
A limiting block is formed at the top of the push rod; the lower part of the push rod is slidably inserted into the first through hole;
The side wall of the top of the swing rod is rotationally connected with one end of a connecting shaft, and the other end of the connecting shaft is used for being connected with a lock rod of a lifting mechanism of the lifting equipment; the lower part of the swing rod is provided with a strip-shaped hole for penetrating the guide rod, the outer side of the guide rod is sleeved with a spring, the spring is positioned between the swing rod and the fixed end of the guide rod, and the free end of the guide rod is provided with a limiting part; the spring is used for driving the bottom end of the swing rod to be separated from a limiting block of the push rod;
one end of the pull rope is connected with the lower part of the swing rod, the other end of the pull rope suspends the protection plate below the bottom plate of the lifting device through the pulley block, and flexible cloth is arranged around the circumference of the protection plate and is used for being connected with the side wall of the bottom plate; the pull rope is used for driving the bottom end of the swing rod to abut against a limiting block of the push rod; the lifting device comprises a base plate, a protection plate, a limiting trigger assembly, a lifting device and a lifting device, wherein the base plate is arranged between the base plate and the protection plate, the limiting trigger assembly comprises a support, a connecting rod and a limiting switch, the support is used for being fixed on the base plate, a first end of the connecting rod is connected with the support in a rotating mode, a second end of the connecting rod extends towards the protection plate, the limiting switch is arranged at the second end of the connecting rod, and the limiting switch is electrically connected with an electric cabinet of the lifting device.
2. The manual descent device of the lifting device according to claim 1, wherein a limit sleeve is sleeved outside the guide rod, the limit sleeve is located between the guide rod and the spring, and one end, close to the swing rod, of the limit sleeve is located right above the limit block.
3. The manual lowering device of a lifting apparatus according to claim 1, wherein a rolling member is rotatably provided at a bottom end of the swing link.
4. The manual lowering device of a lifting apparatus according to claim 1, further comprising an alarm electrically connected to an electric cabinet of the lifting apparatus, wherein a trigger plate extending outwards is formed on a side wall of the push rod below the top plate, a micro switch is fixed on a side wall of the mounting seat, an action reed of the micro switch is located on a moving stroke of the trigger plate, and the micro switch is electrically connected to the electric cabinet of the lifting apparatus.
5. The manual lowering device of a lifting apparatus according to claim 1, wherein the mounting base includes a U-shaped base and a riser, one end of the riser is connected to the U-shaped base, the other end of the riser extends upward and protrudes out of a top surface of the U-shaped base, the first through hole is formed in the U-shaped base, and the guide bar is fixed to an upper portion of the riser.
6. The manual lowering device of a lifting apparatus of claim 1, wherein the end face of the first end of the link is a ramp for interference fit with the base plate.
7. The manual lowering device of a lifting device according to claim 1, wherein the pulley block comprises a plurality of pulley seats and pulleys corresponding to the pulley seats one by one, the pulley seats are used for being fixed on a coaming or a bottom plate of the lifting device, the pulleys are rotatably arranged on the pulley seats, and the pull rope is wound on the pulleys.
8. A lifting system comprising lifting equipment, wherein the lifting equipment comprises an electric cabinet, a lifting mechanism electrically connected with the electric cabinet and a carriage body formed by surrounding a top plate, a coaming and a bottom plate, and the lifting mechanism is arranged above the top plate, and the lifting system is characterized by further comprising a manual descending device of the lifting equipment according to any one of claims 1 to 7.
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| CN202010340853.5A CN111439708B (en) | 2020-04-26 | 2020-04-26 | Manual descending device and lifting system of lifting equipment |
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| CN202010340853.5A CN111439708B (en) | 2020-04-26 | 2020-04-26 | Manual descending device and lifting system of lifting equipment |
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| CN115611118B (en) * | 2022-09-28 | 2025-11-04 | 中际联合（北京）科技股份有限公司 | Tower hoist |
| CN119870771B (en) * | 2025-03-27 | 2025-07-01 | 济南金胜星机械设备有限公司 | A closed laser engraving machine |
| CN120440820B (en) * | 2025-07-10 | 2025-11-18 | 山东高速齐鲁建设集团有限公司 | A safety device and method for lifting an exterior wall high-altitude work platform |
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| CN103434912B (en) * | 2013-08-22 | 2015-07-22 | 常熟市琴茂机械有限公司 | Steel wire rope clamping device of elevator |
| KR101929263B1 (en) * | 2017-06-07 | 2018-12-14 | 권순범 | Elevator door emergency opening apparatus |
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