Lifting device and lifting equipment

Abstract

The utility model relates to the technical field of high-altitude operation, and provides a lifting device and lifting equipment. The lifting device comprises a lifting assembly, a mounting rack and an overload recognition assembly, the overload recognition assembly comprises a limiting part, a pre-tightening part, an overload spring and a displacement monitoring part, the limiting part is connected with the mounting rack, and the first end of the pre-tightening part slidably penetrates through the limiting part and then is connected to the lifting assembly; the overload spring is arranged on the pre-tightening part in a sleeving mode, one end of the overload spring abuts against the limiting part, the other end of the overload spring abuts against the second end of the pre-tightening part, and the displacement monitoring part is arranged on the mounting rack and used for monitoring displacement of the overload spring and / or the pre-tightening part relative to the displacement monitoring part. According to the lifting device provided by the utility model, overload information can be directly reflected through the overload identification assembly, and the overload spring and other components are low-cost components which are easy to obtain, so that the burden of the lifting device in the aspects of production, manufacture and use can be effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to high altitude operation technical field especially, relate to a kind of hoisting device and lifting equipment. BACKGROUND

[0002] When conveying personnel, materials and the like between aerial work platform and initial platform, the elevator (lifting equipment) is a commonly used device, and the working principle of the elevator is generally to pull along the working steel wire rope suspended on the lifting point by means of the hoisting assembly, and then realize the ascending or descending movement. In order to prevent the overload operation of the elevator, the hoisting assembly is usually provided with an overload sensor, which sends an overload warning to the control assembly to prompt when the load of the elevator exceeds the rated load.

[0003] However, in the prior art, the overload sensor of the hoisting assembly of the elevator often uses an analog signal, which cannot be recognized by the control assembly, and thus a signal conversion device needs to be specially provided for the overload sensor to convert the analog signal into a digital signal. Due to the high cost of the overload sensor and the signal conversion device, it brings great burden to the production and use of the lifting equipment. SUMMARY

[0004] The first aspect of the utility model provides a hoisting device to solve the defect of high overload monitoring cost in the prior art. The overload identification assembly monitors the load of the mounting rack, which can directly reflect the overload information. Moreover, the overload spring, the pre-tightening component, the limiting component and the displacement monitoring component are low-cost components that are easy to obtain. Under the premise of ensuring the overload identification effect, the burden of the hoisting device in production and use can be effectively reduced.

[0005] The second aspect of the utility model provides a lifting equipment.

[0006] The hoisting device provided by the utility model comprises a hoisting assembly, a mounting rack and an overload identification assembly. The overload identification assembly comprises a limiting component, a pre-tightening component, an overload spring and a displacement monitoring component. The limiting component is connected to the mounting rack. The first end of the pre-tightening component is slidably connected to the hoisting assembly after passing through the limiting component.

[0007] The overload spring is sleeved on the pre-tightening component. One end of the overload spring abuts against the limiting component, and the other end abuts against the second end of the pre-tightening component. The displacement monitoring component is arranged on the mounting rack. The displacement monitoring component is used to monitor the displacement of the overload spring and / or the pre-tightening component relative to the displacement monitoring component.

[0008] According to the lifting device, the pre-tightening component comprises a guide bolt and a pre-tightening nut, a first end of the guide bolt is connected to the lifting assembly after penetrating through the limiting component;

[0009] The pre-tightening nut is arranged at a second end of the guide bolt, the overload spring is sleeved on the guide bolt, one end of the overload spring abuts against the limiting component, and the other end of the overload spring abuts against the pre-tightening nut, and the pre-tightening nut is used for pre-tightening the overload spring.

[0010] According to the lifting device, the pre-tightening component further comprises a trigger, the trigger is sleeved on the guide bolt and located between the pre-tightening nut and the overload spring, and the displacement monitoring component is used for monitoring the displacement of the trigger relative to the displacement monitoring component.

[0011] According to the lifting device, the displacement monitoring component comprises a plunger type limit switch, the plunger type limit switch is arranged on the mounting rack, a contact of the plunger type limit switch is located above the trigger, and the contact is arranged at a preset distance from the trigger or is in contact with the trigger.

[0012] According to the lifting device, the mounting rack comprises a mounting frame and a first mounting plate, the first mounting plate is arranged on the mounting frame, the lifting assembly is located above the first mounting plate, one end of the lifting assembly away from the pre-tightening component is rotationally connected to the first mounting plate, and one end of the lifting assembly towards the pre-tightening component is slidingly connected to the first mounting plate.

[0013] According to the lifting device, a vertical first waist-shaped hole is arranged on the first mounting plate, a limiting bolt is arranged at one end of the lifting assembly towards the pre-tightening component, the limiting bolt is arranged in the first waist-shaped hole and is adapted to slide along the first waist-shaped hole.

[0014] According to the lifting device, the lifting assembly comprises a driving motor and a planetary gear lifting component, the planetary gear lifting component is arranged on the mounting rack and connected to the pre-tightening component, the driving motor is horizontally arranged on one side of the planetary gear lifting component, and the planetary gear lifting component is used for lifting movement along the main steel wire rope.

[0015] According to the lifting device, the lifting assembly further comprises a safety lock and a second mounting plate, the second mounting plate is arranged on the top of the planetary gear lifting component, the safety lock is arranged on the second mounting plate, and the safety lock is used for lifting movement along the secondary steel wire rope.

[0016] According to the lifting device, the lifting assembly further comprises a force relieving bolt, the second mounting plate is provided with a vertical second waist-shaped hole, a plurality of protrusions are arranged at intervals in the groove wall of the second waist-shaped hole, one end of the force relieving bolt is connected with the safety lock, and the other end is arranged at the bottom of the second waist-shaped hole, and the protrusions are used for limiting the movement of the force relieving bolt along the second waist-shaped hole.

[0017] The lifting device provided by the utility model, comprising any one of the preceding lifting device.

[0018] In the lifting device provided by the utility model embodiment, when the lifting assembly starts to move upward, the lifting force of the lifting assembly is first transmitted to the overload spring sleeved on the pre-tightening component through the pre-tightening component connected to the lifting assembly, and since the overload spring abuts between the second end of the pre-tightening component and the limiting component, the lifting force is further transmitted to the mounting rack connected with the limiting component through the limiting component, thereby realizing the upward movement of the whole lifting device.

[0019] It can also be understood that since the lifting assembly drives the mounting rack to move with the help of the overload identification assembly, the self-gravity of the mounting rack and the load weight thereof are applied to the lifting assembly through the overload identification assembly. These weights are characterized by the extrusion of the limiting component and the second end of the pre-tightening component on the overload spring. Specifically, when the overload spring is extruded, the extrusion is reflected in the deformation amount of the overload spring, that is, the overload spring is reduced synchronously with the extrusion (the bottom of the overload spring moves upward relative to the displacement monitoring component).

[0020] Further, since the pre-tightening component and the limiting component are in sliding fit, the reduced amount will become the displacement change amount of the pre-tightening component relative to the limiting component (the pre-tightening component moves upward relative to the limiting component), that is, equivalent to the displacement change of the pre-tightening component relative to the mounting rack and the displacement monitoring component; by monitoring the displacement change of the overload spring and / or the pre-tightening component relative to the displacement monitoring component with the help of the displacement monitoring component, the self-gravity of the mounting rack and the load weight of the mounting rack can be identified.

[0021] In this process, if the load weight of the mounting rack exceeds the rated load of the lifting device, the weight of the overweight part can also be characterized by the extrusion of the limiting component and the second end of the pre-tightening component on the overload spring, in other words, the additional extrusion of the overload spring will be converted into the reduced amount of the overload spring and the displacement of the pre-tightening component relative to the displacement monitoring component; by monitoring the displacement change of the overload spring and / or the pre-tightening component relative to the displacement monitoring component with the help of the displacement monitoring component, it can be judged whether the load of the mounting rack exceeds the rated load of the lifting device.

[0022] Compared with the prior art, the lifting device provided in the embodiment of the utility model, when the load of the installation rack exceeds the rated load, the overload information can be directly reflected by monitoring the load of the installation rack through the overload identification assembly. Compared with the combination scheme of the overload sensor and the signal conversion device, in the overload identification assembly provided in the embodiment of the utility model, the overload spring, the pre-tightening component, the limiting component and the displacement monitoring component are low-cost components that are easy to obtain, and under the premise of ensuring the overload identification effect, the burden of the lifting device in production and use can be effectively reduced. In addition, if failure and fracture occur due to overload, compared with the slight deformation of the overload sensor, the deformation amount of the overload spring is more intuitive and clear, and is more easily perceived and identified, so that the safety of the device can be greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0024] Figure 1 It is the shaft side structure schematic view of the lifting device provided in the embodiment of the utility model.

[0025] Figure 2 It is the partial structure schematic view of the lifting device provided in the embodiment of the utility model.

[0026] Figure 3 It is the explosion structure schematic view of the pre-tightening component provided in the embodiment of the utility model.

[0027] Figure 4 It is the shaft side schematic view of the installation rack provided in the embodiment of the utility model.

[0028] Figure 5 It is the front view of the first mounting plate provided in the embodiment of the utility model.

[0029] Figure 6 It is the shaft side schematic view of the lifting device in another view provided in the embodiment of the utility model.

[0030] Figure 7 It is the safety lock and the second mounting plate provided in the embodiment of the utility model.

[0031] Figure 8 It is the front view of the second mounting plate provided in the embodiment of the utility model.

[0032] Figure 9 It is the shaft side schematic view of the lifting device provided in the embodiment of the utility model.

[0033] Reference signs:

[0034] 10: lifting device; 100: lifting assembly; 110: limit bolt; 120: driving motor; 130: planetary gear lifting component; 140: main steel wire rope; 150: safety lock; 160: second mounting plate; 170: secondary steel wire rope; 180: force relief bolt; 190: second waist-shaped hole; 200: mounting rack; 210: mounting frame; 220: first mounting plate; 221: first waist-shaped hole; 300: overload identification assembly; 310: limiting component; 320: pre-tightening component; 321: guide bolt; 322: pre-tightening nut; 323: trigger; 330: overload spring; 340: displacement monitoring component; 341: plunger type limit switch. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0036] In the description of the embodiments of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0037] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0038] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0039] Figure 1 is a schematic diagram of the shaft side structure of the lifting device provided by the embodiments of the present application; Figure 2 is a schematic diagram of the partial structure of the lifting device provided by the embodiments of the present application.

[0040] Referring to Figure 1 and Figure 2 In an optional embodiment of the present application, the lifting device 10 comprises a lifting assembly 100, a mounting rack 200 and an overload identification assembly 300. Among them, the lifting assembly 100 is used to pull the main steel wire rope 140 suspended on the lifting point to move upward or downward, and the mounting rack 200 is used to load other components such as a car or a carrying platform.

[0041] The overload identification assembly 300 is located below the lifting assembly 100, and the overload identification assembly 300 comprises a limiting component 310, a pre-tightening component 320, an overload spring 330 and a displacement monitoring component 340. The limiting component 310 is fixedly connected with the mounting rack 200, the first end (upper end) of the pre-tightening component 320 passes through the limiting component 310 from bottom to top and is fixedly connected with the lifting assembly 100, and the pre-tightening component 320 is in sliding fit with the limiting component 310. From another angle, the limiting component 310 can be regarded as a structure integrated with the mounting rack 200, and the pre-tightening component 320 can be regarded as a structure integrated with the lifting assembly 100. The limiting component 310 keeps synchronous movement with the mounting rack 200, and the pre-tightening component 320 also keeps synchronous movement with the lifting assembly 100.

[0042] The overload spring 330 is sleeved on the pre-tightening component 320, one end of the overload spring 330 abuts against the limiting component 310, and the other end of the overload spring 330 abuts against the second end (lower end) of the pre-tightening component 320. The displacement monitoring component 340 is fixed to the mounting rack 200, and the displacement monitoring component 340 is used to monitor the displacement of the overload spring 330 relative to the displacement monitoring component 340, that is, the displacement of the overload spring 330 relative to the mounting rack 200.

[0043] In the optional example of the utility model, the displacement monitoring component 340 can also be used for monitoring the displacement of the pre-tightening component 320 relative to the displacement monitoring component 340, that is, monitoring the displacement of the pre-tightening component 320 relative to the mounting rack 200; in another optional example of the utility model, the displacement monitoring component 340 can also simultaneously monitor the displacement of the overload spring 330 and the pre-tightening component 320 relative to the displacement monitoring component 340 (the mounting rack 200), and specifically, the actual situation can be adaptively selected.

[0044] Referring to Figure 1 And Figure 2 It can be understood that when the lifting assembly 100 starts to move upward, the lifting force of the lifting assembly 100 is first transmitted to the overload spring 330 sleeved on the pre-tightening component 320 through the pre-tightening component 320 connected to the lifting assembly 100 in the lifting device 10 provided by the utility model embodiment, and since the overload spring 330 abuts between the second end of the pre-tightening component 320 and the limiting component 310, the lifting force is further transmitted to the mounting rack 200 connected with the limiting component 310 through the limiting component 310, thereby realizing the upward movement of the whole lifting device 10.

[0045] It can also be understood that since the lifting assembly 100 drives the mounting rack 200 to move through the overload identification assembly 300, the self-gravity of the mounting rack 200 and the load weight thereof are applied to the lifting assembly 100 through the overload identification assembly 300. These weights are characterized by the extrusion of the limiting component 310 and the second end of the pre-tightening component 320 on the overload spring 330, and specifically, when the overload spring 330 is extruded, the extrusion is reflected in the deformation amount of the overload spring 330, that is, the overload spring 330 is reduced synchronously with the extrusion (the bottom of the overload spring 330 moves upward relative to the displacement monitoring component 340).

[0046] Further, since the pre-tightening component 320 and the limiting component 310 are in sliding fit, the reduced amount will become the displacement change amount of the pre-tightening component 320 relative to the limiting component 310 (the pre-tightening component 320 moves upward relative to the limiting component 310), that is, equivalent to the displacement change of the pre-tightening component 320 relative to the mounting rack 200 and the displacement monitoring component 340; by monitoring the displacement change of the overload spring 330 and / or the pre-tightening component 320 relative to the displacement monitoring component 340 through the displacement monitoring component 340, the self-gravity of the mounting rack 200 and the load weight of the mounting rack 200 can be identified.

[0047] In this process, if the load weight of the installation rack 200 exceeds the rated load of the lifting device 10, the weight of the excess part can also be characterized by the extrusion of the overload spring 330 from the limiting component 310 and the second end of the pre-tightening component 320, in other words, the additional extrusion of the overload spring 330 will be converted into the reduced margin of the overload spring 330 and the displacement of the pre-tightening component 320 relative to the displacement monitoring component 340. By monitoring the displacement of the overload spring 330 and / or the pre-tightening component 320 relative to the displacement monitoring component 340 by means of the displacement monitoring component 340, it can be determined whether the load of the installation rack 200 exceeds the rated load of the lifting device 10.

[0048] Compared with the prior art, the lifting device 10 provided in the embodiment of the utility model can directly reflect the overload information by monitoring the load of the installation rack 200 through the overload identification assembly 300 when the load of the installation rack 200 exceeds the rated load. Compared with the combination scheme of the overload sensor and the signal conversion device, in the overload identification assembly 300 provided in the embodiment of the utility model, the overload spring 330, the pre-tightening component 320, the limiting component 310 and the displacement monitoring component 340 are all low-cost components that are easy to obtain, which can effectively reduce the burden of the lifting device 10 in production and use under the premise of ensuring the overload identification effect. In addition, if failure and fracture occur due to overload, compared with the slight deformation of the overload sensor, the deformation amount of the overload spring 330 is more intuitive and clear, and is more easily perceived and identified, thereby greatly improving the safety of the lifting device 10.

[0049] Figure 3 It is an explosion structure schematic view of the pre-tightening component provided in the embodiment of the utility model.

[0050] Referring to Figure 2 and Figure 3 In the optional embodiment of the utility model, the pre-tightening component 320 includes a guide bolt 321 and a pre-tightening nut 322, the first end of the guide bolt 321 is connected to the lifting assembly 100 after penetrating through the limiting component 310; the pre-tightening nut 322 is arranged at the second end of the guide bolt 321, the overload spring 330 is sleeved on the guide bolt 321, one end of the overload spring 330 abuts against the limiting component 310, and the other end abuts against the pre-tightening nut 322.

[0051] By changing the depth of the pre-tightening nut 322 screwed into the guide bolt 321, the pre-tightening of the overload spring 330 can be realized. In the pre-tightening state, the overload spring 330 will generate an upward elastic force on the limiting component 310, so that the limiting component 310 and the lifting assembly 100 abut together; it is easy to understand that if the force transmitted by the installation rack 200 to the overload spring 330 through the limiting component 310 is not greater than the pre-tightening force of the pre-tightening nut 322, the overload spring 330 cannot be deformed with the increase of the load.

[0052] It can be understood that, by pre-tightening the overload spring 330 through the pre-tightening nut 322, a fixed pre-tightening force is given to the overload spring 330, for example, the pre-tightening force is equal to the sum of the self-weight of the mounting rack 200 and the rated load of the lifting device 10, so that when the actual load of the mounting rack 200 is less than or equal to the rated load, the force transmitted by the limiting component 310 to the overload spring 330 is less than or equal to the elastic force of the overload spring 330 to the limiting component 310, and in this process, as described above, the overload spring 330 does not deform.

[0053] When the actual load of the mounting rack 200 is greater than the rated load, the force transmitted by the limiting component 310 to the overload spring 330 is greater than the elastic force of the overload spring 330 to the limiting component 310, which causes the overload spring 330 to be further compressed, and in this process, the overload spring 330 deforms.

[0054] In summary, by setting the pre-tightening force equal to the sum of the self-weight of the mounting rack 200 and the rated load of the lifting device 10, the rated load can be made as a clear dividing line, that is, when the load is less than or equal to the rated load, the overload spring 330 does not deform, and when the load is greater than the rated load, the overload spring 330 deforms.

[0055] Further, by monitoring whether the overload spring 330 deforms, that is, whether the guide bolt 321 and the pre-tightening nut 322 displace relative to the displacement monitoring component 340, it can be directly determined whether the actual load of the mounting rack 200 exceeds the rated load of the lifting device 10. This setting is simple and clear, on the one hand, it can facilitate the design and installation of the displacement monitoring component 340, and on the other hand, it can simplify the identification method and reduce the difficulty of overload identification.

[0056] Continuing to refer to Figure 2 and Figure 3 In the optional embodiments of the utility model, the pre-tightening component 320 further comprises a trigger piece 323, the trigger piece 323 is sleeved on the guide bolt 321 and located between the pre-tightening nut 322 and the overload spring 330, the trigger piece 323 is a plate-shaped piece, the trigger piece 323 comprises a connecting part and an extension part, a through hole is arranged in the middle of the connecting part to facilitate sleeving on the guide bolt 321, the extension part is arranged on the side of the connecting part facing the displacement monitoring component 340, and the displacement monitoring component 340 is used for monitoring the displacement change of the trigger piece 323 relative to the displacement monitoring component 340.

[0057] It can be understood that by setting the trigger 323, the displacement monitoring component 340 can be conveniently set, for example, the displacement monitoring component 340 can be set as a photoelectric door or a limit switch, and in an optional example of the utility model, the displacement monitoring component 340 can also be a scale mark set on the mounting rack 200, the initial position of the trigger 323 is set below the scale mark and closely next to the scale mark, and in the case that the pre-tightening force is equal to the sum of the self-weight of the mounting rack 200 and the rated load of the lifting device 10 in the foregoing embodiment, by comparing the position of the trigger 323 relative to the scale mark, it can be judged whether the load of the mounting rack 200 is overloaded.

[0058] Continuing to refer to Figure 2 and Figure 3 In an optional embodiment of the utility model, the displacement monitoring component 340 comprises a plunger type limit switch 341, the plunger type limit switch 341 is arranged on the mounting rack 200, the contact of the plunger type limit switch 341 is located above the extension of the trigger 323 and is in contact (just contacts, but there is no force transmission between the two) with the extension, in this way, once the trigger 323 is synchronously moved upward with the guide bolt 321, the plunger type limit switch 341 will be triggered, and in the case that the pre-tightening force is equal to the sum of the self-weight of the mounting rack 200 and the rated load of the lifting device 10 in the foregoing embodiment, once the plunger type limit switch 341 is triggered, the overload information of the mounting rack 200 can be quickly identified.

[0059] In an optional embodiment of the utility model, different from the foregoing embodiment, in the embodiment of the utility model, the contact of the plunger type limit switch 341 and the extension of the trigger 323 are arranged at a preset distance, and it needs to be preferentially stated that in this case, the pre-tightening force of the pre-tightening nut 322 on the overload spring 330 needs to be less than the sum of the self-weight of the mounting rack 200 and the rated load of the lifting device 10, and also needs to be matched with the preset distance, and the details are described below.

[0060] Since the pre-tightening force is less than the sum of the self-weight of the mounting rack 200 and the rated load of the lifting device 10, the overload spring 330 has two states, one is that when the force applied to the overload spring 330 by the limiting component 310 is less than or equal to the pre-tightening force, at this time, even if the actual load continues to increase, the overload spring 330 will not be compressed.

[0061] Secondly, when the force applied to the overload spring 330 by the limiting component 310 of the mounting rack 200 is greater than the pre-tightening force and smaller than the sum of the self-weight of the mounting rack 200 and the rated load of the lifting device 10, the difference between the force applied to the overload spring 330 by the limiting component 310 of the mounting rack 200 and the pre-tightening force will push the overload spring 330 to compress, and in this process, the extension part of the trigger 323 will move upward synchronously with the compression of the overload spring 330. In the process of continuing to increase the actual load, when the force applied to the overload spring 330 by the limiting component 310 of the mounting rack 200 is equal to the sum of the self-weight of the mounting rack 200 and the rated load of the lifting device 10, the extension part of the trigger 323 will be in contact with the contact of the plunger type limit switch 341.

[0062] In the embodiment, the difference between the sum of the self-weight of the mounting rack 200 and the rated load of the lifting device 10 and the pre-tightening force needs to match the preset distance between the extension part of the trigger 323 and the contact of the plunger type limit switch 341, which means that from the beginning when the force applied to the overload spring 330 by the limiting component 310 of the mounting rack 200 is smaller than the pre-tightening force to the end when the force applied to the overload spring 330 by the limiting component 310 of the mounting rack 200 (the load is gradually increased) is equal to the sum of the self-weight of the mounting rack 200 and the rated load of the lifting device 10, the compression amount of the overload spring 330, that is, the displacement change amount of the trigger 323 relative to the plunger type limit switch 341 needs to be equal to the preset distance. The reason for such setting is to ensure that when the force applied to the overload spring 330 by the limiting component 310 of the mounting rack 200 is equal to the sum of the self-weight of the mounting rack 200 and the rated load of the lifting device 10, the trigger 323 will move upward by the preset distance and be in contact with the contact of the plunger type limit switch 341. In this way, if the actual load continues to increase, that is, the overload occurs, the further movement of the trigger 323 will cause the contact of the plunger type limit switch 341 to be triggered, thereby causing the plunger type limit switch 341 to send an overload alarm signal.

[0063] It should be further noted that the pre-tightening force cannot be greater than the sum of the self-weight of the mounting rack 200 and the rated load of the lifting device 10. If such setting is made, even if the overload problem occurs, the displacement monitoring component 340 can not be able to determine whether the overload occurs, because when the force applied to the overload spring 330 by the limiting component 310 of the mounting rack 200 is between the sum of the self-weight of the mounting rack 200 and the rated load of the lifting device 10 and the pre-tightening force, although the overload problem has occurred at this time, the overload spring 330 will not deform with the increase of the load, because the force applied to the overload spring 330 by the limiting component 310 of the mounting rack 200 is still smaller than the elastic force of the overload spring 330 to the limiting component 310 at this time.

[0064] In the optional embodiment of the utility model, the overload spring 330 can be made of stainless steel material, and an anticorrosive paint surface is arranged on the surface of the overload spring 330, and it can be understood that the service life of the overload spring 330 can be improved, and the problem of structural failure due to rust can be avoided; when the lifting device 10 is applied to an environment such as a sea tower drum, because the maintenance of the sea tower drum is difficult, the stainless steel spring with the anticorrosive paint surface can effectively reduce the maintenance frequency of the lifting assembly 100, and the maintenance cost of the lifting device 10 can be greatly reduced.

[0065] Figure 4 It is the axle side schematic view of the mounting rack provided by the utility model embodiment.

[0066] Referring to Figure 1 、 Figure 2 and Figure 4 In the optional embodiment of the utility model, the mounting rack 200 comprises a mounting frame 210 and a first mounting plate 220, the mounting frame 210 is a rectangular frame, one end of the first mounting plate 220 is connected with one end of the mounting frame 210, the other end of the first mounting plate 220 is connected with the other end of the mounting frame 210, the lifting assembly 100 is located above the first mounting plate 220, one end of the lifting assembly 100 away from the pre-tightening component 320 is rotationally connected with the first mounting plate 220, and one end of the lifting assembly 100 towards the pre-tightening component 320 is slidingly connected with the first mounting plate 220, in other words, one end of the lifting assembly 100 towards the pre-tightening component 320 can slide relative to the first mounting plate 220.

[0067] In the utility model embodiment, two first mounting plates 220 are arranged, and the first mounting plate 220 can also be one or more, and the specific number can be adaptively arranged according to the actual situation, and the utility model embodiment takes two first mounting plates 220 as an example, the two first mounting plates 220 are arranged in parallel and at intervals, and the arrangement of the two first mounting plates 220 can improve the stability of supporting the lifting assembly 100, and is beneficial to the stress transmission between the lifting assembly 100, the overload identification assembly 300 and the first mounting plate 220. In the optional embodiment of the utility model, when the lifting device 10 is applied to a fan tower drum, the size of the mounting frame 210 can be changed to match different specifications of the tower drum, so that the modular design of the lifting device 10 can be facilitated.

[0068] When assembled and connected, the overload identification component is arranged between the two first mounting plates 220, and the limiting component 310 and the displacement monitoring component 340 in the overload identification component can be fixed on any one of the first mounting plates 220 or on both of the first mounting plates 220.

[0069] It can be understood that the end of the lifting assembly 100 away from the pre-tightening component 320 is rotationally connected with the first mounting plate 220, and the end of the lifting assembly 100 close to the pre-tightening component 320 is slidingly connected with the first mounting plate 220, so that when the overload spring 330 in the above-mentioned embodiment is compressed and deformed, the end of the lifting assembly 100 close to the pre-tightening component 320 will rotate around the end away from the pre-tightening component 320, that is, the end of the lifting assembly 100 close to the pre-tightening component 320 will be raised.

[0070] However, since the end of the lifting assembly 100 away from the pre-tightening component 320 cannot be separated from the first mounting plate 220, and since the end of the lifting assembly 100 close to the pre-tightening component 320 is slidingly connected with the first mounting plate 220, the lifting of the lifting assembly 100 can be limited in this way. The advantage of this arrangement is that even if the overload identification assembly 300 fails to transmit the lifting force due to structural failure, the mounting rack 200 can ensure stable connection with the lifting assembly 100, thereby ensuring the stability and safety of the lifting device 10. From another perspective, this limitation also protects the overload identification assembly 300, which can avoid the problem of the overload identification assembly 300 being damaged when the load exceeds the bearing limit of the overload identification assembly 300.

[0071] Further, the sliding connection described above is set according to the stress limit of the overload spring 330, which can also protect the overload spring 330, so that the overload spring 330 can be prevented from being broken due to excessive compression, thereby prolonging the service life of the overload spring 330.

[0072] Figure 5 is a front view of the first mounting plate according to an embodiment of the present application.

[0073] Referring to Figure 1 , Figure 2 and Figure 5 In optional embodiments of the present application, the first mounting plate 220 is provided with a first waist-shaped hole 221, the length direction of the first waist-shaped hole is consistent with the movable direction of the guide bolt 321, the end of the lifting assembly 100 close to the pre-tightening component 320 is provided with a limiting bolt 110, which is arranged in the first waist-shaped hole 221, and the limiting bolt 110 is adapted to slide along the first waist-shaped hole 221.

[0074] Specifically, when the guide bolt 321 moves upward relative to the mounting rack 200, the limiting bolt 110 also moves upward along the first waist-shaped hole 221; it can be understood that, by arranging the first waist-shaped hole 221, the movement range of the limiting bolt 110 relative to the mounting rack 200 can be limited, and thus the movement range of the guide bolt 321 relative to the mounting rack 200 can be limited, so that the lifting of the lifting assembly 100 can be limited to a certain extent, and even if the overload identification assembly 300 fails to transmit the lifting force due to structural failure, the mounting rack 200 can ensure the stable connection with the lifting assembly 100, thereby ensuring the stability and safety of the lifting device 10; from another perspective, the arrangement of the first waist-shaped hole 221 is also a protection for the overload identification assembly 300, which can avoid the problem that the overload identification assembly 300 is damaged when the load exceeds the limit of the overload identification assembly 300.

[0075] In the optional embodiment of the utility model, the length of the first waist-shaped hole 221 is arranged according to the stress limit of the overload spring 330, which can also protect the overload spring 330, so that the problem of fracture of the overload spring 330 due to excessive compression can be avoided, thereby prolonging the service life of the overload spring 330.

[0076] Figure 6 is the shaft side schematic view of the lifting device in another perspective provided by the embodiment of the utility model.

[0077] Referring to Figure 1 and Figure 6 In the optional embodiment of the utility model, the lifting assembly 100 comprises a driving motor 120 and a planetary gear lifting component 130, the planetary gear lifting component 130 is arranged on the mounting rack 200, one end of the planetary gear lifting component 130 away from the pre-tightening component 320 is rotationally connected with the first mounting plate 220, and the other end of the planetary gear lifting component 130 towards the pre-tightening component 320 is slidingly connected with the first waist-shaped hole 221 on the first mounting plate 220.

[0078] The driving motor 120 is horizontally arranged on one side of the planetary gear lifting component 130, the driving motor 120 is used for driving the planetary gear lifting component 130 to rotate forward or reversely, and the planetary gear lifting component 130 is used for lifting along the main steel wire.

[0079] In the prior art, the lifting assembly 100 generally uses a worm gear type lifting machine, the lifting machine is provided with a worm gear and a gear shaft two-stage speed reduction device, these devices have large noise and high cost, and have large overall volume, and the motor matched therewith must be arranged vertically, which leads to high overall height of the existing lifting machine.

[0080] Referring to Figure 1 andFigure 6 It can be understood that the lifting device 10 provided by the embodiment of the utility model, through setting planetary gear lifting component 130, because of the structural characteristics of planetary gear lifting component 130 itself, in this way, driving motor 120 can lie down and set, compared with the defect that driving motor 120 can only be set vertically in the worm gear type lifting assembly in the prior art, planetary gear lifting component 130 and the driving motor 120 that lies down and sets, can effectively reduce the occupation of lifting device 10 on the longitudinal space, the longitudinal space that is left empty can be used for integrating safety lock 150, reverse rope assembly, upper limit switch and terminal limit switch and other components, can make the space utilization of lifting device 10 higher, also can make the space arrangement of lifting device 10 more reasonable.In addition, compared with the worm gear type lifting assembly, the mass of planetary gear lifting component 130 is lighter, the noise is smaller, and the overall volume is also smaller, which can make the lifting device 10 meet more different working environments.

[0081] Figure 7 It is the second mounting plate of the safety lock and the utility model embodiment provides.

[0082] Referring to Figure 6 And Figure 7 In the optional embodiment of the utility model, the second mounting plate 160 is arranged at the top of the planetary gear lifting component 130, and the safety lock 150 is installed on the second mounting plate 160, and the safety lock 150 can be lifted along the secondary steel wire rope 170.

[0083] In the prior art, the driving motor 120 can only be set vertically due to the constraint of the worm gear, which makes the space occupied by the lifting device 10 in the longitudinal direction too large, and further causes the safety lock 150, the upper limit switch and the terminal limit switch and other components to be unable to be arranged above the driving motor 120, but only can be dispersedly arranged on other structures of the lifting device 10.

[0084] And, due to the limitation of the worm gear on the import and export positions of the main steel wire rope 140, and the need to maintain the main steel wire rope 140 and the secondary steel wire rope 170 within a specific preset distance range, these conditions cause a larger plate to be often arranged in the prior art as a mounting support plate for the safety lock 150 and the worm gear type lifting machine and other components, which causes the volume of the lifting device 10 to be too large.

[0085] It can be understood that, in the lifting device 10 provided by the embodiment of the utility model, based on the aforementioned planetary gear lifting component 130 and the transversely placed driving motor 120, the safety lock 150, the upper limit switch and the ultimate limit switch and other components can be integrated and arranged above the driving motor 120 by means of the second mounting plate 160; and, since the second mounting plate 160 only needs to install components such as the safety lock 150 which has a small volume, compared with the mounting support plate in the prior art, the volume of the second mounting plate 160 can be greatly reduced, which can effectively reduce the volume of the lifting device 10.

[0086] Figure 8 is the front view of the second mounting plate provided by the embodiment of the utility model.

[0087] Referring to Figure 7 and Figure 8 In the optional embodiment of the utility model, the lifting assembly 100 further comprises a force relieving bolt 180, and correspondingly, the second mounting plate 160 is provided with a second waist-shaped hole 190, the second waist-shaped hole 190 is arranged in the vertical direction, and meanwhile, a plurality of protrusions are arranged on the groove wall of the second waist-shaped hole 190 at intervals, one end of the force relieving bolt 180 is connected with the safety lock 150, and the other end is arranged at the bottom of the second waist-shaped hole 190, when the safety lock 150 moves relative to the second mounting plate 160, the protrusions can limit the movement of the force relieving bolt 180 along the second waist-shaped hole 190.

[0088] Specifically, when the main steel wire rope 140 is broken or accidentally falls, the weight of the lifting device 10 will be moved from the main steel wire rope 140 to the safety lock 150 and the secondary steel wire rope 170, at this time, the safety lock 150 will immediately lock the secondary steel wire rope 170 to avoid the falling of the lifting device 10. It is not difficult to understand that, in the process of transferring the weight of the lifting device 10 from the main steel wire rope 140 to the secondary steel wire rope 170 and locking the safety lock 150, the lifting device 10 will perform a free fall motion in a short period of time.

[0089] Taking the application of the lifting device 10 in the lifting equipment as an example, if there are passengers in the car of the lifting equipment, the passengers will do the free fall motion together with the car, if the safety lock 150 is locked at this time, the car will suddenly stop, which will cause a great impact on the passengers, and will also have a great influence on the stability of the whole lifting equipment.

[0090] In the embodiment of the utility model, through setting the waist -shaped hole on the second mounting plate 160, when the safety lock 150 is locked, the second mounting plate 160 is driven by the planetary gear lifting component 130 and other components and will continue to fall a certain distance, and the distance is the length of the waist -shaped hole, because there are multiple protrusions in the waist -shaped hole, so during the falling of the second mounting plate 160, the relief bolt 180 will flatten the interference amount of multiple protrusions in the second waist -shaped hole 190. This flattening process will form a certain obstacle to the falling of the second mounting plate 160, and then play the role of unloading, which will effectively reduce the impact of the car on the passenger, and effectively improve the stability of the whole lifting equipment. It should be noted that the second mounting plate 160 needs to be replaced after the relief process.

[0091] Figure 9 It is the shaft side schematic view of the lifting equipment provided by the embodiment of the utility model.

[0092] Referring to Figure 9 The second aspect of the embodiment of the utility model provides a kind of lifting equipment, and lifting equipment includes the lifting device 10 described in any of preceding embodiments, and the specific setting of lifting equipment can be adapted to prior art, this paper will not be described again;It can be understood that, since the lifting equipment provided by the embodiment of the utility model includes the lifting device 10 described in any of preceding embodiments, so lifting equipment also has the beneficial effects of lifting device 10 in any of preceding embodiments, and specific beneficial effects can be referred to as described above, this paper will not be described again.

[0093] It should be noted that the technical solutions in the various embodiments of the utility model can be combined with each other, but the basis of mutual combination is that the ordinary skilled person in the art can realize it;When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, i.e.

[0094] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them;Although the utility model has been described in detail with reference to the preceding embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the preceding embodiments, or make equivalent replacement to part of the technical features;And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A hoisting device, characterized in that The lifting assembly (100), the mounting rack (200) and the overload identification assembly (300) are provided, the overload identification assembly (300) comprises a limiting component (310), a pre-tightening component (320), an overload spring (330) and a displacement monitoring component (340), the limiting component (310) is connected with the mounting rack (200), the first end of the pre-tightening component (320) is slidably connected with the lifting assembly (100) through the limiting component (310); The overload spring (330) is sleeved on the pre-tightening component (320), one end of the overload spring (330) abuts against the limiting component (310), the other end abuts against the second end of the pre-tightening component (320), and the displacement monitoring component (340) is arranged on the mounting rack (200), and the displacement monitoring component (340) is used for monitoring the displacement of the overload spring (330) and / or the pre-tightening component (320) relative to the displacement monitoring component (340).

2. The lifting device of claim 1, wherein, The pre-tightening component (320) comprises a guide bolt (321) and a pre-tightening nut (322), the first end of the guide bolt (321) is connected with the lifting assembly (100) through the limiting component (310); The pre-tightening nut (322) is arranged at the second end of the guide bolt (321), the overload spring (330) is sleeved on the guide bolt (321), one end of the overload spring (330) abuts against the limiting component (310), and the other end abuts against the pre-tightening nut (322), and the pre-tightening nut (322) is used for pre-tightening the overload spring (330).

3. The lifting device of claim 2, wherein, The pre-tightening component (320) further comprises a trigger (323), the trigger (323) is sleeved on the guide bolt (321) and located between the pre-tightening nut (322) and the overload spring (330), and the displacement monitoring component (340) is used for monitoring the displacement of the trigger (323) relative to the displacement monitoring component (340).

4. The lifting device of claim 3, wherein, The displacement monitoring component (340) comprises a plunger type limit switch (341), the plunger type limit switch (341) is arranged on the mounting rack (200), the contact of the plunger type limit switch (341) is located above the trigger (323) and is arranged at a preset distance from the trigger (323) or is in contact with the trigger (323).

5. A lifting device according to any one of claims 1 to 4, characterised in that The mounting rack (200) comprises a mounting frame (210) and a first mounting plate (220), the first mounting plate (220) is arranged on the mounting frame (210), the lifting assembly (100) is located above the first mounting plate (220), one end of the lifting assembly (100) away from the pre-tightening component (320) is rotationally connected with the first mounting plate (220), and one end of the lifting assembly (100) towards the pre-tightening component (320) is slidably connected with the first mounting plate (220).

6. The lifting device of claim 5, wherein, The first mounting plate (220) is provided with a vertical first waist-shaped hole (221), one end of the lifting assembly (100) towards the pre-tightening component (320) is provided with a limiting bolt (110), the limiting bolt (110) is arranged in the first waist-shaped hole (221) and is suitable for sliding along the first waist-shaped hole (221).

7. A lifting device according to any one of claims 1 to 4, characterised in that The lifting assembly (100) comprises a driving motor (120) and a planetary gear lifting component (130), the planetary gear lifting component (130) is arranged on the mounting rack (200) and is connected with the pre-tightening component (320), the driving motor (120) is horizontally arranged on one side of the planetary gear lifting component (130), and the planetary gear lifting component (130) is used for lifting along the main steel wire rope (140).

8. The lifting device of claim 7, wherein, The lifting assembly (100) further comprises a safety lock (150) and a second mounting plate (160), the second mounting plate (160) is arranged on the top of the planetary gear lifting component (130), and the safety lock (150) is arranged on the second mounting plate (160), the safety lock (150) is used for lifting along the secondary steel wire rope (170).

9. The lifting device of claim 8, wherein, The lifting assembly (100) further comprises a force relieving bolt (180), the second mounting plate (160) is provided with a vertical second waist-shaped hole (190), a plurality of protrusions are arranged at intervals between the groove walls of the second waist-shaped hole (190), one end of the force relieving bolt (180) is connected with the safety lock (150), the other end is arranged at the bottom of the second waist-shaped hole (190), and the protrusions are used for limiting the movement of the force relieving bolt (180) along the second waist-shaped hole (190).

10. An elevating device characterized by The lifting device (10) comprises any one of the preceding claims 1 to 9.

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