Lifting device and lifting equipment

Abstract

The invention 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 invention, the 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, manufacturing and use can be effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of aerial work, and in particular to a lifting device and a lifting equipment. Background Art

[0002] When transporting personnel, materials, etc. between the aerial work platform and the initial platform, the elevator (lifting equipment) is a commonly used equipment. The working principle of the elevator is generally to use the lifting component to pull along the working wire rope hanging on the lifting point to achieve the upward or downward movement. In order to prevent the elevator from overloading, the lifting component is usually equipped with an overload sensor. When the load of the elevator exceeds its rated load, the overload sensor will send an overload warning to the control component to prompt it.

[0003] However, in the prior art, the overload sensor of the lifting component of the elevator often uses an analog signal, which cannot be recognized by the control component, and thus a signal conversion device needs to be specially equipped 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, this has brought a great burden to the production and use of the lifting equipment. Summary of the invention

[0004] The first aspect of the present invention provides a lifting device to solve the defect of high overload monitoring cost in the prior art. The overload identification component monitors the load of the mounting frame, which can directly reflect the overload information. In addition, the overload spring, preload component, limit component and displacement monitoring component are all easy-to-obtain low-cost components. Under the premise of ensuring the overload identification effect, the burden of the lifting device in production and use can be effectively reduced.

[0005] A second aspect of the present invention provides a lifting device.

[0006] The lifting device provided by the present invention comprises a lifting assembly, a mounting frame and an overload identification assembly, wherein the overload identification assembly comprises a limit component, a pre-tightening component, an overload spring and a displacement monitoring component, wherein the limit component is connected to the mounting frame, and the first end of the pre-tightening component is slidably passed through the limit component and then connected to the lifting assembly; The overload spring is sleeved on the pre-tensioning component, one end of the overload spring abuts against the limiting component, and the other end abuts against the second end of the pre-tensioning component. The displacement monitoring component is arranged on the mounting frame, and the displacement monitoring component is used to monitor the displacement of the overload spring and / or the pre-tensioning component relative to the displacement monitoring component.

[0007] According to the lifting device provided by the present invention, the pre-tightening component comprises a guide bolt and a pre-tightening nut, and the first end of the guide bolt passes through the limiting component and is connected to the lifting assembly; The pre-tightening nut is arranged at the 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 abuts against the pre-tightening nut, and the pre-tightening nut is used to pre-tighten the overload spring.

[0008] According to the lifting device provided by the present invention, the pre-tightening component also includes a triggering component, which is sleeved on the guide bolt and located between the pre-tightening nut and the overload spring, and the displacement monitoring component is used to monitor the displacement of the triggering component relative to the displacement monitoring component.

[0009] According to the lifting device provided by the present invention, the displacement monitoring component includes a plunger type limit switch, and the plunger type limit switch is arranged on the mounting frame. The contact of the plunger type limit switch is located above the trigger member and is arranged at a preset distance from the trigger member or is in contact with the trigger member.

[0010] According to the lifting device provided by the present invention, the mounting frame includes 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-tensioning component is rotatably connected to the first mounting plate, and one end of the lifting assembly toward the pre-tensioning component is slidably connected to the first mounting plate.

[0011] According to the lifting device provided by the present invention, a vertical first waist-shaped hole is provided on the first mounting plate, and a limiting bolt is provided at one end of the lifting assembly facing the pre-tightening component. The limiting bolt passes through the first waist-shaped hole and is suitable for sliding along the first waist-shaped hole.

[0012] According to the lifting device provided by the present invention, the lifting assembly includes a driving motor and a planetary gear lifting component, the planetary gear lifting component is arranged on the mounting frame and connected to the preload component, the driving motor is arranged horizontally on one side of the planetary gear lifting component, and the planetary gear lifting component is used to perform lifting and lowering movements along the main steel wire rope.

[0013] According to the lifting device provided by the present invention, the lifting assembly also includes 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 and lowering movements along the secondary steel wire rope.

[0014] According to the lifting device provided by the present invention, the lifting assembly also includes a stress-removing bolt, the second mounting plate is provided with a vertical second waist-shaped hole, the groove wall of the second waist-shaped hole is provided with a plurality of protrusions at intervals, one end of the stress-removing bolt is connected to the safety lock, and the other end is provided at the bottom of the second waist-shaped hole, and the protrusion is used to limit the movement of the stress-removing bolt along the second waist-shaped hole.

[0015] The lifting equipment provided by the present invention comprises the lifting device described in any one of the above items.

[0016] In the lifting device provided in the embodiment of the present invention, when the lifting component starts to make an upward movement, the lifting force of the lifting component will first be transmitted to the overload spring mounted on the preload component through the preload component connected to the lifting component. Since the overload spring abuts between the second end of the preload component and the limiting component, the lifting force will be further transmitted to the mounting frame connected to the limiting component through the limiting component, thereby realizing the overall upward movement of the lifting device.

[0017] It can also be understood that, since the lifting assembly drives the mounting frame to move with the help of the overload identification assembly, the self-weight of the mounting frame and its load weight will be applied to the lifting assembly through the overload identification assembly. These weights will be characterized by the compression of the overload spring by the second end of the limit component and the preload component. Specifically, when the overload spring is compressed, the compression will be reflected in the deformation of the overload spring itself, that is, the overload spring will shrink synchronously with the compression (the bottom of the overload spring will move upward relative to the displacement monitoring component).

[0018] Furthermore, since the pre-tightening component and the limiting component are in a sliding fit, these reduced margins will become the displacement change of the pre-tightening component relative to the limiting component (the pre-tightening component will move upward relative to the limiting component), which is equivalent to the displacement change of the pre-tightening component relative to the mounting frame 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 dead weight of the mounting frame and the load weight of the mounting frame can be identified.

[0019] In this process, if the load weight of the mounting frame exceeds the rated load of the lifting device, the weight of the overweight part will also be manifested by the squeezing of the overload spring by the limiting component and the second end of the preload component. In other words, the additional squeezing of the overload spring will be converted into the reduction margin of the overload spring and the displacement of the preload component relative to the displacement monitoring component. By monitoring the displacement changes of the overload spring and / or the preload component relative to the displacement monitoring component with the help of the displacement monitoring component, it can be determined whether the load of the mounting frame exceeds the rated load of the lifting device.

[0020] Compared to the prior art, the lifting device provided in the embodiment of the present invention can directly reflect the overload information by monitoring the load of the mounting frame through the overload identification component when the load of the mounting frame exceeds the rated load. Compared to the combination of the overload sensor and the signal conversion device, in the overload identification component provided in the embodiment of the present invention, the overload spring, preload component, limit component and displacement monitoring component are all easy-to-obtain low-cost components, which can effectively reduce the burden of the lifting device in production and use while 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 of the overload spring is more intuitive and clear, and easier to be detected and identified, thereby greatly improving the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the axial structure of the lifting device provided in an embodiment of the present invention.

[0023] Figure 2 It is a schematic diagram of the partial structure of the lifting device provided in an embodiment of the present invention.

[0024] Figure 3 It is a schematic diagram of the exploded structure of the pre-tightening component provided in an embodiment of the present invention.

[0025] Figure 4 It is an axial schematic diagram of a mounting frame provided in an embodiment of the present invention.

[0026] Figure 5 It is a front view of the first mounting plate provided in an embodiment of the present invention.

[0027] Figure 6 It is an axial schematic diagram of the lifting device provided by an embodiment of the present invention at another viewing angle.

[0028] Figure 7 The invention relates to a safety lock and a second mounting plate provided in an embodiment of the invention.

[0029] Figure 8 It is a front view of the second mounting plate provided in an embodiment of the present invention.

[0030] Fig. 9 It is an axial schematic diagram of the lifting device provided in an embodiment of the present invention.

[0031] Reference numerals: 10: lifting device; 100: lifting assembly; 110: limiting bolt; 120: driving motor; 130: planetary gear lifting component; 140: main wire rope; 150: safety lock; 160: second mounting plate; 170: secondary wire rope; 180: unloading bolt; 190: second waist-shaped hole; 200: mounting frame; 210: mounting frame; 220: first mounting plate; 221: first waist-shaped hole; 300: overload identification component; 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 limit switch. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0034] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean 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, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0036] Figure 1 is a schematic diagram of the axial structure of a lifting device provided in an embodiment of the present invention; Figure 2 It is a schematic diagram of the partial structure of the lifting device provided in an embodiment of the present invention.

[0037] See also Figure 1 and Figure 2 In an optional embodiment of the present invention, the lifting device 10 includes a lifting assembly 100, a mounting frame 200 and an overload identification assembly 300. The lifting assembly 100 is used to pull the main steel wire rope 140 suspended on the suspension point to perform an ascending or descending movement, and the mounting frame 200 is used to load other components such as a car or a loading platform.

[0038] The overload identification component 300 is located below the lifting component 100. The overload identification component 300 includes a limit component 310, a pre-tightening component 320, an overload spring 330 and a displacement monitoring component 340. The limit component 310 is fixedly connected to the mounting frame 200. The first end (upper end) of the pre-tightening component 320 passes through the limit component 310 from bottom to top and is fixedly connected to the lifting component 100, and the pre-tightening component 320 and the limit component 310 are slidably matched. From another perspective, the limit component 310 can be regarded as a structure integrated with the mounting frame 200, and the pre-tightening component 320 can be regarded as a structure integrated with the lifting component 100. The limit component 310 and the mounting frame 200 maintain synchronous movement. Similarly, the pre-tightening component 320 also maintains synchronous movement with the lifting component 100.

[0039] The overload spring 330 is sleeved on the preload 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 preload component 320. The displacement monitoring component 340 is fixed to the mounting frame 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, to monitor the displacement of the overload spring 330 relative to the mounting frame 200.

[0040] In an optional example of the present invention, the displacement monitoring component 340 can also be used to monitor the displacement of the pre-tensioning component 320 relative to the displacement monitoring component 340, that is, to monitor the displacement of the pre-tensioning component 320 relative to the mounting frame 200; in another optional example of the present invention, the displacement monitoring component 340 can also simultaneously monitor the displacement of the overload spring 330 and the pre-tensioning component 320 relative to the displacement monitoring component 340 (mounting frame 200). Specifically, it can be adaptively selected according to actual conditions.

[0041] See also Figure 1 and Figure 2 It can be understood that in the lifting device 10 provided in the embodiment of the present invention, when the lifting component 100 starts to make an upward movement, the lifting force of the lifting component 100 will first be transmitted to the overload spring 330 mounted on the preload component 320 through the preload component 320 connected to the lifting component 100. Since the overload spring 330 abuts between the second end of the preload component 320 and the limiting component 310, the lifting force will be further transmitted to the mounting frame 200 connected to the limiting component 310 through the limiting component 310, thereby realizing the overall upward movement of the lifting device 10.

[0042] It can also be understood that, since the lifting assembly 100 drives the mounting frame 200 to move with the help of the overload identification assembly 300, the self-gravity of the mounting frame 200 and its load weight will be applied to the lifting assembly 100 through the overload identification assembly 300. These weights will be characterized by the compression of the overload spring 330 by the second ends of the limiting component 310 and the preload component 320. Specifically, when the overload spring 330 is compressed, the compression will be reflected in the deformation of the overload spring 330 itself, that is, the overload spring 330 will shrink synchronously with the compression (the bottom of the overload spring 330 will move upward relative to the displacement monitoring component 340).

[0043] Furthermore, since the pre-tensioning component 320 and the limiting component 310 are in sliding fit, these reduced margins will become the displacement change of the pre-tensioning component 320 relative to the limiting component 310 (the pre-tensioning component 320 will move upward relative to the limiting component 310), which is equivalent to the displacement change of the pre-tensioning component 320 relative to the mounting frame 200 and the displacement monitoring component 340; by monitoring the displacement change of the overload spring 330 and / or the pre-tensioning component 320 relative to the displacement monitoring component 340 with the help of the displacement monitoring component 340, the dead weight of the mounting frame 200 and the load weight of the mounting frame 200 can be identified.

[0044] In this process, if the load weight of the mounting frame 200 exceeds the rated load weight of the lifting device 10, the weight of the overweight part will also be manifested by the squeezing of the overload spring 330 by the second end of the limiting component 310 and the pre-tensioning component 320. In other words, the additional squeezing of the overload spring 330 will be converted into the reduction margin of the overload spring 330 and the displacement of the pre-tensioning component 320 relative to the displacement monitoring component 340. By monitoring the displacement changes of the overload spring 330 and / or the pre-tensioning component 320 relative to the displacement monitoring component 340 with the help of the displacement monitoring component 340, it can be determined whether the load of the mounting frame 200 exceeds the rated load weight of the lifting device 10.

[0045] Compared with the prior art, the lifting device 10 provided in the embodiment of the present invention can directly reflect the overload information by monitoring the load of the mounting frame 200 through the overload identification component 300 when the load of the mounting frame 200 exceeds the rated load. Compared with the combination of the overload sensor and the signal conversion device, in the overload identification component 300 provided in the embodiment of the present invention, the overload spring 330, the preload component 320, the limit component 310 and the displacement monitoring component 340 are all easy-to-obtain low-cost components, which can effectively reduce the burden of the lifting device 10 in production, manufacturing and use while 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 of the overload spring 330 is more intuitive and clear, and easier to be detected and identified, thereby greatly improving the safety of the device 10.

[0046] Figure 3 It is a schematic diagram of the exploded structure of the pre-tightening component provided in an embodiment of the present invention.

[0047] See also Figure 2 and Figure 3 In an optional embodiment of the present invention, the pre-tightening component 320 includes a guide bolt 321 and a pre-tightening nut 322. The first end of the guide bolt 321 passes through the limiting component 310 and is connected to the lifting assembly 100; the pre-tightening nut 322 is arranged on the second end of the guide bolt 321, and 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.

[0048] By changing the depth of the pre-tightening nut 322 screwed into the guide bolt 321, the overload spring 330 can be pre-tightened. In the pre-tightened 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 are pressed together; it is easy to understand that if the force transmitted by the mounting frame 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 will not be deformed as the load increases.

[0049] It can be understood that the overload spring 330 is pre-tightened by the pre-tightening nut 322, and 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 deadweight of the mounting frame 200 and the rated load of the lifting device 10. In this way, when the actual load of the mounting frame 200 is less than or equal to the rated load, the force transmitted to the overload spring 330 by the limiting component 310 will be less than or equal to the elastic force of the overload spring 330 on the limiting component 310. In this process, as described above, the overload spring 330 will not be deformed.

[0050] When the actual load of the mounting frame 200 is greater than the rated load, the force transmitted by the limiting component 310 to the overload spring 330 will be greater than the elastic force of the overload spring 330 on the limiting component 310, which will cause the overload spring 330 to be further compressed. During this process, the overload spring 330 will be deformed.

[0051] In summary, by setting the preload force equal to the sum of the deadweight of the mounting frame 200 and the rated load of the lifting device 10, the rated load can be made into an obvious dividing line, that is, when the load is less than or equal to the rated load, the overload spring 330 will not deform, and when the load is greater than the rated load, the overload spring 330 will deform.

[0052] Furthermore, by monitoring whether the overload spring 330 is deformed, that is, monitoring whether the guide bolt 321 and the pre-tightening nut 322 are displaced relative to the displacement monitoring component 340, it is possible to directly determine whether the actual load of the mounting frame 200 exceeds the rated load of the lifting device 10. This arrangement is simple and clear, which can facilitate the design and installation of the displacement monitoring component 340 on the one hand, and simplify the identification method on the other hand, reducing the difficulty of overload identification.

[0053] Continue reading Figure 2 and Figure 3 In an optional embodiment of the present invention, the preload component 320 also includes a trigger component 323, which is sleeved on the guide bolt 321 and located between the preload nut 322 and the overload spring 330. The trigger component 323 is a plate-shaped component, and the trigger component 323 includes a connecting portion and an extending portion. A through hole is provided in the middle of the connecting portion to facilitate sleeve placement on the guide bolt 321. The extending portion is provided on a side of the connecting portion toward the displacement monitoring component 340. The displacement monitoring component 340 is used to monitor the displacement change of the trigger component 323 relative to the displacement monitoring component 340.

[0054] It can be understood that by setting the trigger member 323, the setting of the displacement monitoring component 340 can be facilitated. For example, the displacement monitoring component 340 can be set as a photoelectric door or a limit switch. In an optional example of the present invention, the displacement monitoring component 340 can also be a scale mark set on the mounting frame 200, so that the initial position of the trigger member 323 is set below the scale mark and close to the scale mark. In the aforementioned embodiment, when the preload force is equal to the sum of the deadweight of the mounting frame 200 and the rated load of the lifting device 10, by comparing the position of the trigger member 323 relative to the scale mark, it can be determined whether the load of the mounting frame 200 is overloaded.

[0055] Continue reading Figure 2 and Figure 3 In an optional embodiment of the present invention, the displacement monitoring component 340 includes a plunger limit switch 341, which is arranged on the mounting frame 200. The contact of the plunger limit switch 341 is located above the extension of the trigger member 323 and contacts the extension (just contacts, but there is no force transmission between the two). In this way, once the trigger member 323 moves up synchronously with the guide bolt 321, the plunger limit switch 341 will be triggered. In the aforementioned embodiment, when the preload force is equal to the sum of the deadweight of the mounting frame 200 and the rated load of the lifting device 10, once the plunger limit switch 341 is triggered, the overweight information of the mounting frame 200 can be quickly identified.

[0056] In an optional embodiment of the present invention, different from the aforementioned embodiment, in the embodiment of the present invention, the contact of the plunger limit switch 341 and the extension of the trigger member 323 are arranged at a preset distance. It should be noted 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 deadweight of the mounting frame 200 and the rated load of the lifting device 10, and also needs to match the preset distance. Please see below for details.

[0057] Since the preload force is less than the sum of the deadweight of the mounting frame 200 and the rated load of the lifting device 10, the overload spring 330 exists in two states. First, when the force applied to the overload spring 330 by the mounting frame 200 through the limiting component 310 is less than or equal to the preload force, at this time, even if the actual load continues to increase, the overload spring 330 will not be compressed.

[0058] Secondly, when the force applied by the mounting frame 200 to the overload spring 330 through the limiting component 310 is greater than the preload force and less than the sum of the deadweight of the mounting frame 200 and the rated load of the lifting device 10, the difference between the force applied by the mounting frame 200 to the overload spring 330 through the limiting component 310 and the preload force will push the overload spring 330 to compress. During this process, the extended portion of the trigger member 323 will move upward synchronously with the compression of the overload spring 330. While continuing to increase the actual load, when the force applied by the mounting frame 200 to the overload spring 330 through the limiting component 310 is equal to the sum of the deadweight of the mounting frame 200 and the rated load of the lifting device 10, the extended portion of the trigger member 323 will contact the contact of the plunger limit switch 341.

[0059] In this embodiment, the difference between the sum of the deadweight of the mounting frame 200 and the rated load of the lifting device 10 and the preload force needs to match the preset distance between the extended portion of the trigger member 323 and the contact of the plunger limit switch 341, which means: from the time when the force applied by the mounting frame 200 to the overload spring 330 through the limiting component 310 is less than the preload force, until the force applied by the mounting frame 200 to the overload spring 330 through the limiting component 310 (the load gradually increases) is equal to the sum of the deadweight of the mounting frame 200 and the rated load of the lifting device 10, the compression amount of the overload spring 330, that is, the relative compression amount of the trigger member 323, The displacement change of the plunger limit switch 341 needs to be equal to the aforementioned preset distance. The reason for this setting is to ensure that when the force applied by the mounting frame 200 to the overload spring 330 through the limiting component 310 is equal to the sum of the deadweight of the mounting frame 200 and the rated load of the lifting device 10, the trigger member 323 can just touch the contact of the plunger limit switch 341 after moving up the preset distance. In this way, if the actual load continues to increase, that is, overload, then further movement of the trigger member 323 will cause the contact of the plunger limit switch 341 to be triggered, thereby causing the plunger limit switch 341 to send an overload alarm signal.

[0060] It should also be noted that the preload force cannot be greater than the sum of the deadweight of the mounting frame 200 and the rated load of the lifting device 10. If it is set in this way, even if an overload problem occurs, the displacement monitoring component 340 may not be able to determine whether it is overloaded, because when the force applied by the mounting frame 200 to the overload spring 330 through the limiting component 310 is between the sum of the deadweight of the mounting frame 200 and the rated load of the lifting device 10 and the preload force, although an overload problem has occurred at this time, the overload spring 330 will not deform with the increase of the load, because at this time the force applied by the mounting frame 200 to the overload spring 330 through the limiting component 310 is still less than the elastic force of the overload spring 330 on the limiting component 310.

[0061] In an optional embodiment of the present invention, the overload spring 330 can be made of stainless steel and an anti-corrosion paint surface is provided on the surface of the overload spring 330. It can be understood that this can increase the service life of the overload spring 330 and avoid structural failure due to rust. When the lifting device 10 is used in an environment such as an offshore tower, due to the difficulty in repairing the offshore tower, the stainless steel spring with an anti-corrosion paint surface can effectively reduce the number of repairs and maintenance of the lifting assembly 100, which can greatly reduce the maintenance cost of the lifting device 10.

[0062] Figure 4 It is an axial schematic diagram of a mounting frame provided in an embodiment of the present invention.

[0063] See also Figure 1 , Figure 2 and Figure 4 In an optional embodiment of the present invention, the mounting frame 200 includes 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 to one end of the mounting frame 210, and the other end of the first mounting plate 220 is connected to the other end of the mounting frame 210, the lifting assembly 100 is located above the first mounting plate 220, the end of the lifting assembly 100 away from the pre-tightening component 320 is rotatably connected to the first mounting plate 220, and the end of the lifting assembly 100 facing the pre-tightening component 320 is slidably connected to the first mounting plate 220. In other words, the end of the lifting assembly 100 facing the pre-tightening component 320 can slide relative to the first mounting plate 220 to a certain extent.

[0064] In the embodiment of the present invention, two first mounting plates 220 are provided, and the first mounting plates 220 can also be provided as one or more, and specifically, can be adaptively provided according to actual conditions. In the embodiment of the present invention, two first mounting plates 220 are taken as an example, and the two first mounting plates 220 are provided in parallel and spaced apart. The provision of the two first mounting plates 220 can improve the stability of the support of the lifting assembly 100, and is beneficial to the stress transfer between the lifting assembly 100 and the overload identification assembly 300 and the first mounting plates 220. In an optional embodiment of the present invention, when the lifting device 10 is applied to a wind turbine tower, the size of the mounting frame 210 can be changed to match towers of different specifications, which can be beneficial to the modular design of the lifting device 10.

[0065] During assembly and connection, the overload identification component is disposed 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 can be fixed on both first mounting plates 220 at the same time.

[0066] It can be understood that the end of the lifting assembly 100 away from the pre-tensioning component 320 is rotatably connected to the first mounting plate 220, and the end of the lifting assembly 100 close to the pre-tensioning component 320 is slidably connected to the first mounting plate 220. In this arrangement, when the overload spring 330 in the aforementioned embodiment is compressed and deformed, the end of the lifting assembly 100 close to the pre-tensioning component 320 will rotate around the end away from the pre-tensioning component 320, that is, the end of the lifting component close to the pre-tensioning component 320 will be lifted up.

[0067] However, since the end of the lifting component 100 away from the pre-tensioning component 320 cannot be separated from the first mounting plate 220, and since the end of the lifting component 100 close to the pre-tensioning component 320 is slidably connected to the first mounting plate 220, this can limit the tilting of the lifting component 100 to a certain extent. The advantage of this arrangement is that even if the overload identification component 300 fails in structure and cannot transmit the lifting force, the mounting frame 200 can ensure a stable connection with the lifting component 100, thereby ensuring the stability and safety of the lifting device 10. From another perspective, this limitation is also a protection for the overload identification component 300, which can avoid the problem of the overload identification component 300 being damaged due to the load exceeding the bearing limit of the overload identification component 300.

[0068] Furthermore, the aforementioned sliding connection is configured accordingly according to the force limit of the overload spring 330 , which can also protect the overload spring 330 . In this way, the overload spring 330 can be prevented from breaking due to excessive compression, thereby increasing the service life of the overload spring 330 .

[0069] Figure 5 It is a front view of the first mounting plate provided in an embodiment of the present invention.

[0070] See also Figure 1 , Figure 2 and Figure 5 In an optional embodiment of the present invention, a first waist-shaped hole 221 is provided on the first mounting plate 220, and the length direction of the first waist-shaped hole is consistent with the movable direction of the guide bolt 321. A limiting bolt 110 is provided at one end of the lifting assembly 100 facing the pre-tightening component 320, which is passed through the first waist-shaped hole 221, and the limiting bolt 110 is suitable for sliding along the first waist-shaped hole 221.

[0071] Specifically, when the guide bolt 321 moves upward relative to the mounting frame 200, the limit bolt 110 will also move upward along the first waist-shaped hole 221; it is understandable that by setting the first waist-shaped hole 221, the movement range of the limit bolt 110 relative to the mounting frame 200 can be limited, and then the movement range of the guide bolt 321 relative to the mounting frame 200 can be limited, so that the tilting of the lifting component 100 can be limited to a certain extent. With this arrangement, even if the overload identification component 300 fails structurally and cannot transmit the lifting force, the mounting frame 200 can also ensure a stable connection with the lifting component 100, thereby ensuring the stability and safety of the lifting device 10; from another perspective, the provision of the first waist-shaped hole 221 is also a protection for the overload identification component 300, which can avoid the problem of the overload identification component 300 being damaged due to the load exceeding the limit of the overload identification component 300.

[0072] In an optional embodiment of the present invention, the length of the first waist-shaped hole 221 is set accordingly according to the force limit of the overload spring 330, which can also protect the overload spring 330. In this way, the overload spring 330 can be prevented from breaking due to excessive compression, thereby increasing the service life of the overload spring 330.

[0073] Figure 6 It is an axial schematic diagram of the lifting device provided by an embodiment of the present invention at another viewing angle.

[0074] See also Figure 1 and Figure 6 In an optional embodiment of the present invention, the lifting assembly 100 includes a driving motor 120 and a planetary gear lifting component 130, the planetary gear lifting component 130 is arranged on the mounting frame 200, the end of the planetary gear lifting component 130 away from the pre-tightening component 320 is rotatably connected to the first mounting plate 220, and the end of the planetary gear lifting component 130 toward the pre-tightening component 320 is slidably connected to the first waist-shaped hole 221 on the first mounting plate 220.

[0075] The driving motor 120 is disposed horizontally on one side of the planetary gear lifting component 130 . The driving motor 120 is used to drive the planetary gear lifting component 130 to rotate forward or reversely. The planetary gear lifting component 130 is used to perform lifting and lowering movements along the main steel wire.

[0076] In the prior art, the lifting assembly 100 generally uses a worm gear hoist, which is provided with a two-stage reduction device of a worm gear and a gear shaft. These devices are noisy, costly, and have a large overall size. At the same time, the motor matched therewith must be arranged longitudinally, which results in a relatively high overall height of the existing hoist.

[0077] See also Figure 1 and Figure 6It can be understood that the lifting device 10 provided in the embodiment of the present invention, by setting the planetary gear lifting component 130, due to the structural characteristics of the planetary gear lifting component 130 itself, the drive motor 120 can be set horizontally. Compared with the defect that the drive motor 120 in the worm gear lifting assembly in the prior art can only be set longitudinally, the planetary gear lifting component 130 and the drive motor 120 set horizontally can effectively reduce the occupation of the longitudinal space of the lifting device 10. The free longitudinal space can be used to integrate components such as the safety lock 150, the rope reversing assembly, the upper limit switch and the ultimate limit switch, which can make the space utilization rate of the lifting device 10 higher and the space layout of the lifting device 10 more reasonable. In addition, compared with the worm gear lifting assembly, the planetary gear lifting component 130 is lighter, has less noise, and has a smaller overall volume, which can improve the lifting device 10 to meet more different working environments.

[0078] Figure 7 The invention relates to a safety lock and a second mounting plate provided in an embodiment of the invention.

[0079] See also Figure 6 and Figure 7 In an optional embodiment of the present invention, a second mounting plate 160 is disposed on the top of the planetary gear lifting component 130 , and a safety lock 150 is mounted on the second mounting plate 160 , and the safety lock 150 can be lifted and lowered along the secondary wire rope 170 .

[0080] In the prior art, due to the constraints of the worm gear, the drive motor 120 can only be set longitudinally, which makes the lifting device 10 occupy too much space in the longitudinal direction, and thus causes components such as the safety lock 150, the upper limit switch and the ultimate limit switch to be unable to be set above the drive motor 120, and can only be dispersedly set on other structures of the lifting device 10.

[0081] Furthermore, due to the restrictions imposed by the worm gear on the inlet and outlet positions of the main wire rope 140, and the need for the main wire rope 140 and the secondary wire rope 170 to be maintained within a specific preset distance range, these situations often require the provision of a larger plate in the prior art as a mounting support plate for components such as the safety lock 150 and the worm gear hoist. This plate will cause the lifting device 10 to be too large.

[0082] It can be understood that in the lifting device 10 provided in the embodiment of the present invention, based on the aforementioned planetary gear lifting component 130 and the horizontally placed drive motor 120, components such as the safety lock 150, the upper limit switch and the ultimate limit switch can be integrated above the drive motor 120 with the help of the second mounting plate 160; and, given that the second mounting plate 160 only needs to install components such as the smaller safety lock 150, the volume of the second mounting plate 160 can be greatly reduced compared to the mounting support plate in the prior art, which can effectively reduce the volume of the lifting device 10.

[0083] Figure 8 It is a front view of the second mounting plate provided in an embodiment of the present invention.

[0084] See also Figure 7 and Figure 8 In an optional embodiment of the present invention, the lifting assembly 100 also includes a stress-removing bolt 180. Correspondingly, a second waist-shaped hole 190 is provided on the second mounting plate 160. The second waist-shaped hole 190 is arranged vertically. At the same time, a plurality of protrusions are arranged at intervals on the groove wall of the second waist-shaped hole 190. One end of the stress-removing bolt 180 is connected to 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 protrusion can limit the movement of the stress-removing bolt 180 along the second waist-shaped hole 190.

[0085] Specifically, when the main steel wire rope 140 breaks or falls accidentally, the weight of the lifting device 10 will move from the main steel wire rope 140 to the safety lock 150 and the secondary steel wire rope 170, and the safety lock 150 will immediately lock the secondary steel wire rope 170 to prevent the lifting device 10 from falling. It is not difficult to understand that during the process in which the weight of the lifting device 10 is transferred from the main steel wire rope 140 to the secondary steel wire rope 170 and the safety lock 150 is locked, the lifting device 10 will perform a free fall movement in a short period of time.

[0086] Taking the application of the lifting device 10 in a lifting device as an example, if there are passengers in the car of the lifting device, the passengers will perform free fall motion with the car. If the safety lock 150 is locked immediately at this time, the car will suddenly stop, which will cause a great impact on the passengers and will also have a great impact on the overall stability of the lifting device.

[0087] In the embodiment of the present invention, by setting a waist-shaped hole on the second mounting plate 160, after the safety lock 150 is locked, the second mounting plate 160 will continue to fall a certain distance driven by the planetary gear lifting component 130 and other components. This distance is the length of the waist-shaped hole. Since there are multiple protrusions in the waist-shaped hole, during the falling process of the second mounting plate 160, the unloading bolt 180 will flatten the interference 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 a role in unloading. This unloading effect will effectively reduce the impact of the car on the passengers and effectively improve the overall stability of the lifting equipment. It should be noted that the second mounting plate 160 needs to be replaced after the unloading process.

[0088] Fig. 9 It is an axial schematic diagram of the lifting device provided in an embodiment of the present invention.

[0089] See also Fig. 9 A second aspect of an embodiment of the present invention provides a lifting device, the lifting device includes the lifting device 10 described in any one of the aforementioned embodiments. The specific settings of the lifting device can be adaptively designed with reference to the prior art, which will not be repeated herein; it can be understood that since the lifting device provided by the embodiment of the present invention includes the lifting device 10 described in any of the aforementioned embodiments, the lifting device also has the beneficial effects of the lifting device 10 in any of the aforementioned embodiments. The specific beneficial effects can be referred to as described above, which will not be repeated herein.

[0090] It should be noted that the technical solutions in various embodiments of the present invention can be combined with each other, but the basis for the mutual combination is that it can be implemented by ordinary technicians in the field; when the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist, that is, it does not belong to the protection scope of the present invention.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lifting device, characterized in that: The invention comprises a lifting assembly (100), a mounting frame (200) and an overload identification assembly (300), wherein the overload identification assembly (300) comprises a limit component (310), a pre-tightening component (320), an overload spring (330) and a displacement monitoring component (340), wherein the limit component (310) is connected to the mounting frame (200), and a first end of the pre-tightening component (320) is slidably passed through the limit component (310) and then connected to the lifting assembly (100); The overload spring (330) is sleeved on the pre-tightening component (320); one end of the overload spring (330) abuts against the limit component (310), and the other end abuts against the second end of the pre-tightening component (320); the displacement monitoring component (340) is disposed on the mounting frame (200); the displacement monitoring component (340) is used to monitor 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 according to claim 1, characterized in that: The pre-tightening component (320) comprises a guide bolt (321) and a pre-tightening nut (322); a first end of the guide bolt (321) passes through the limiting component (310) and is then connected to the lifting assembly (100); The pre-tightening nut (322) is arranged on 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 to pre-tighten the overload spring (330).

3. The lifting device according to claim 2, characterized in that: The pre-tightening component (320) further comprises a trigger component (323), wherein the trigger component (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 to monitor the displacement of the trigger component (323) relative to the displacement monitoring component (340).

4. The lifting device according to claim 3, characterized in that: The displacement monitoring component (340) comprises a plunger-type limit switch (341), the plunger-type limit switch (341) being arranged on the mounting frame (200), the contact of the plunger-type limit switch (341) being located above the trigger member (323) and being arranged at a preset distance from the trigger member (323) or being in contact with the trigger member (323).

5. The lifting device according to any one of claims 1 to 4, characterized in that: The mounting frame (200) comprises a mounting frame (210) and a first mounting plate (220), wherein the first mounting plate (220) is arranged on the mounting frame (210), the lifting assembly (100) is located above the first mounting plate (220), an end of the lifting assembly (100) away from the pre-tightening component (320) is rotatably connected to the first mounting plate (220), and an end of the lifting assembly (100) facing the pre-tightening component (320) is slidably connected to the first mounting plate (220).

6. The lifting device according to claim 5, characterized in that: A vertical first waist-shaped hole (221) is provided on the first mounting plate (220), and a limiting bolt (110) is provided on one end of the lifting assembly (100) facing the pre-tightening component (320). The limiting bolt (110) is passed through the first waist-shaped hole (221) and is suitable for sliding along the first waist-shaped hole (221).

7. The lifting device according to any one of claims 1 to 4, characterized 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 frame (200) and connected to the pre-tensioning component (320); the driving motor (120) is arranged horizontally on one side of the planetary gear lifting component (130); and the planetary gear lifting component (130) is used to perform lifting and lowering movements along a main steel wire rope (140).

8. The lifting device according to claim 7, characterized in that: The lifting assembly (100) further comprises a safety lock (150) and a second mounting plate (160), wherein 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), and the safety lock (150) is used for performing lifting and lowering movements along the secondary steel wire rope (170).

9. The lifting device according to claim 8, characterized in that: The lifting assembly (100) also includes a load-removing bolt (180), the second mounting plate (160) is provided with a vertical second waist-shaped hole (190), and a plurality of protrusions are provided at intervals on the groove wall of the second waist-shaped hole (190), one end of the load-removing bolt (180) is connected to the safety lock (150), and the other end is provided at the bottom of the second waist-shaped hole (190), and the protrusion is used to limit the movement of the load-removing bolt (180) along the second waist-shaped hole (190).

10. A lifting device, characterized in that: The lifting device (10) comprises any one of the preceding claims 1 to 9.

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