Anti-falling mechanism, driving device and lifting equipment

Abstract

The utility model relates to the technical field of lifting equipment, and provides an anti-falling mechanism, a driving device and lifting equipment. The anti-falling mechanism comprises two guide wheel sets, a trigger assembly and an anti-falling assembly. The two guide wheel groups are oppositely mounted on the driving device; the trigger assembly comprises a crankshaft and a trigger wheel set, the crankshaft is located between the two oppositely-arranged guide wheel sets and is in running fit with the guide wheel sets, the trigger wheel set is arranged on the crankshaft, and a traction rope of the driving device penetrates through the trigger wheel set; the anti-falling assembly is arranged at at least one end of the crankshaft, the anti-falling assembly comprises a locking piece and an elastic piece, the locking piece is fixed to the crankshaft, the rotating center of the locking piece is eccentrically arranged, and the crankshaft is sleeved with the elastic piece; and when the traction rope is in a loose state, the elastic piece recovers the elastic deformation to drive the crankshaft to rotate, so that the locking piece is propped against the guide part to realize locking. The anti-falling mechanism is compact in structural arrangement, low in manufacturing cost, small in needed installation space and capable of being widely applied to lifting equipment with guide rails.

Description

TECHNICAL FIELD

[0001] The utility model relates to hoisting equipment technical field especially relates to a kind of anti-falling mechanism, drive device and hoisting equipment. BACKGROUND

[0002] In wind power, construction and other industries, in order to protect the safety of high-altitude workers, a reliable performance anti-falling mechanism is installed on the hoisting equipment used for high-altitude work, which is used to limit the overspeed descent of the hoisting equipment to prevent falling accidents caused by motor failure, wire rope rupture and other accidents.

[0003] In related technologies, the anti-falling mechanism configured by the hoisting equipment has a complex structure, occupies a large space, and has a high manufacturing cost, which is not convenient to install and maintain, so that some hoisting equipment cannot be configured with an anti-falling mechanism due to the purchase cost or structural space limitation. UTILITY MODEL CONTENTS

[0004] The first aspect of the utility model provides an anti-falling mechanism to solve the above technical defects in the prior art. The structure of the anti-falling mechanism is compact, the manufacturing cost is low, the required installation space is small, and it can be widely applied to hoisting equipment with guide rails.

[0005] The second aspect of the utility model provides a drive device.

[0006] The third aspect of the utility model provides a hoisting equipment.

[0007] The first aspect of the utility model provides an anti-falling mechanism, which comprises two guide wheel sets, a trigger assembly and an anti-falling assembly.

[0008] The two guide wheel sets are adapted to be installed to the drive device, and the two guide wheel sets are oppositely arranged.

[0009] The trigger assembly comprises a crankshaft and a trigger wheel set. The crankshaft is located between the two oppositely arranged guide wheel sets. The crankshaft is rotationally matched with each guide wheel set. The trigger wheel set is arranged on the crankshaft. The traction rope of the drive device is arranged in the trigger wheel set.

[0010] The anti-falling assembly is arranged at least one end of the crankshaft. The anti-falling assembly comprises a locking member and an elastic member. The locking member is arranged on the crankshaft and is relatively fixed with the crankshaft. The rotation center of the locking member is eccentrically arranged. The elastic member is sleeved on the crankshaft.

[0011] When the traction rope is in a tensioned state, a gap is left between the locking member and the guide part, and the elastic member is in an elastically deformed state.

[0012] When the traction rope is in a relaxed state, the elastic member restores elastic deformation to drive the crankshaft to rotate, and the locking member is abutted to the guide part to achieve locking.

[0013] According to the anti-falling mechanism, the guide wheel set comprises a mounting bracket, a side guide wheel and a back wheel.

[0014] The mounting bracket is suitable for being mounted to a driving device, the side guide wheel and the back wheel are both mounted to the mounting bracket, and the axes of the side guide wheel and the back wheel are perpendicular to each other.

[0015] The mounting bracket is internally structured with a avoiding cavity, the crankshaft extends to the avoiding cavity, the locking member is located in the avoiding cavity and is oppositely arranged with the back wheel.

[0016] According to the anti-falling mechanism, the guide wheel set further comprises a pressing wheel, the pressing wheel is located in the avoiding cavity, the pressing wheel is arranged on the crankshaft and keeps relative rotation with the crankshaft, and the pressing wheel is spaced apart from the locking member.

[0017] According to the anti-falling mechanism, both sides of the pressing wheel are provided with a spacer sleeve, and the spacer sleeve is sleeved on the crankshaft.

[0018] According to the anti-falling mechanism, the crankshaft comprises a main shaft, an end shaft and a journal, the end shaft is located at two opposite ends of the main shaft, and the journal is connected between the main shaft and the end shaft.

[0019] The end shaft is rotationally matched with the corresponding mounting bracket, the trigger wheel set is fixed to the main shaft, the main body of the elastic member is sleeved on the end shaft, one end of the elastic member is hooked on the journal, and the other end of the elastic member is connected with the mounting bracket.

[0020] According to the anti-falling mechanism, the anti-falling assembly further comprises a baffle, the baffle is sleeved on the crankshaft, and the baffle is located between the elastic member and the mounting bracket of the corresponding guide wheel set.

[0021] According to the anti-falling mechanism, the locking member comprises a cam main body, and the cam main body is fixedly connected with the crankshaft.

[0022] A plurality of locking teeth are spaced apart on the cam surface of the cam main body away from the rotation center, and the locking teeth are suitable for being abutted to the guide part to achieve locking when the traction rope is in a relaxed state.

[0023] According to the anti-falling mechanism, the trigger wheel set comprises a supporting frame, a trigger wheel and an anti-falling piece.

[0024] The support frame is fixedly arranged on the crankshaft, the trigger wheel and the anti-falling element are arranged on the support frame, and the trigger wheel and the anti-falling element are arranged at intervals.

[0025] The traction rope of the driving device is arranged between the trigger wheel and the anti-falling element.

[0026] The second aspect of the utility model provides a kind of driving device, including device ontology and any one described anti-falling mechanism, and the anti-falling mechanism is fixedly arranged on the device ontology.

[0027] The third aspect of the utility model provides a kind of lifting equipment, including guide component and the described driving device, and the traction rope of the driving device is hung on the guide component, and the guide wheel group of the anti-falling mechanism is suitable for moving along the extension direction of the guide component.

[0028] The anti-falling mechanism provided by the utility model is arranged between the two guide wheel groups arranged oppositely, and the crankshaft is arranged in the corresponding guide wheel group, and the trigger wheel group is arranged on the crankshaft;The anti-falling assembly is arranged at least one end of the crankshaft, and the anti-falling assembly comprises a locking element and an elastic element, the locking element is fixed to the crankshaft, the rotation center of the locking element is eccentrically arranged, and the elastic element is sleeved on the crankshaft.

[0029] When the traction rope is in tension state, the trigger wheel group is driven to rotate by the friction of the traction rope, the crankshaft drives the locking element to deviate away from the guide component, so that a gap is reserved between the locking element and the guide component, and the driving device can move normally along the guide component, at this time, the elastic element is in elastic deformation state, that is, the elastic element has the ability to restore elastic deformation.

[0030] When the traction rope is in relaxation state, the friction of the traction rope on the trigger wheel group disappears, the elastic element restores elastic deformation to drive the crankshaft to rotate, the crankshaft drives the locking element to deviate towards the guide component, so that the locking element abuts against the guide component to realize locking. The anti-falling mechanism provided by the utility model can realize locking and unlocking functions, and has compact structure, low manufacturing cost, small installation space, and can be widely applied to lifting equipment with guide rail.

[0031] The driving device and the lifting equipment provided by the utility model comprise the above-mentioned anti-falling mechanism, so as to have all the advantages mentioned above. ACCREDITED DRAWINGS

[0032] In order to more clearly illustrate the technical scheme of 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 those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0033] Figure 1 is a structure schematic view of the lifting equipment provided by the embodiment of the utility model.

[0034] Figure 2 is one of the partial structure schematic view of the lifting equipment provided by the embodiment of the utility model.

[0035] Figure 3 is the second partial structure schematic view of the lifting equipment provided by the embodiment of the utility model.

[0036] Figure 4 is Figure 3 the front view of the partial structure of the lifting equipment.

[0037] Figure 5 is one of the structure schematic view of the anti-falling mechanism provided by the embodiment of the utility model.

[0038] Figure 6 is the second structure schematic view of the anti-falling mechanism provided by the embodiment of the utility model.

[0039] Figure 7 is the top view of the anti-falling mechanism provided by the embodiment of the utility model.

[0040] Figure 8 is the partial structure schematic view of the anti-falling mechanism provided by the embodiment of the utility model.

[0041] Figure 9 is Figure 8 the exploded schematic view of the partial structure of the anti-falling mechanism.

[0042] Reference signs:

[0043] 10, guide component, 11, guide rail, 12, tread roller,

[0044] 20, driving device, 21, device body, 22, traction rope, 23, hook,

[0045] 30, guide wheel set, 31, mounting bracket, 311, avoiding cavity, 312, first frame body, 313, second frame body, 32, side guide wheel, 33, back wheel, 34, pressure roller, 35, spacer sleeve,

[0046] 40, trigger assembly, 41, crankshaft, 411, main shaft, 412, end shaft, 413, journal, 42, trigger wheel set, 421, support frame, 422, trigger wheel, 423, anti-drop piece,

[0047] 50, anti-falling assembly, 51, locking piece, 511, locking tooth, 52, elastic piece, 53, baffle. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme in the utility model will be described clearly and completely in combination with the drawings in the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative efforts belong to the protection scope of the utility model.

[0049] 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 it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium. For the ordinary 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.

[0050] 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 direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate 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 directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0051] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" 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 present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in one or more embodiments or examples. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0052] Figure 1 is a structural schematic diagram of the lifting device provided by the embodiments of the utility model. Figure 2 is one of the partial structural schematic diagrams of the lifting device provided by the embodiments of the utility model. Figure 3 is the second partial structural schematic diagram of the lifting device provided by the embodiments of the utility model. Figure 4 isFigure 3 Elevation view of a partial structure of the lifting device.

[0053] Referring to Figures 1 to 4 The lifting device can be a climbing device, a tower climbing machine, an elevator, etc., and can be used in the tower barrel of a wind turbine, industrial buildings, the maintenance and inspection of aircraft in the aviation industry, high-altitude work environments of oil drilling platforms, storage tanks and other facilities, and the field of power transmission.

[0054] The lifting device comprises a guide component 10 and a driving device 20, the driving device 20 is arranged on the guide component 10 and can move up and down along the guide direction of the guide component 10, and the lifting device can connect a corresponding transport carrier on the driving device 20 according to the use environment and the use carrier, such as connecting a transport platform on the driving device 20, the transport platform can carry materials (tools) or maintenance personnel, and the transport platform is usually designed with a fence and a footboard to provide sufficient standing space and meet the safety requirements.

[0055] The guide component 10 can be a climbing ladder, which comprises two vertical beams arranged oppositely and a tread roller 12 connected between the two vertical beams. The vertical beam of the climbing ladder can be used as a guide rail 11, or a guide element such as a guide rail 11 can be independently installed on the vertical beam of the climbing ladder, and the lifting device as a whole is guided to move along a predetermined path through the guide rail 11 to ensure the accuracy and stability of the movement track.

[0056] The driving device 20 is a power unit of the whole lifting device, and the driving device 20 comprises a device body 21 and a power source arranged in the device body 21, the device body 21 can be a shell, and the power source can be a reduction motor, the output shaft of the reduction motor is connected with a winding drum, the winding drum is fixedly arranged and wound with a traction rope 22 (such as a steel wire rope or a chain), the traction rope 22 extends out of the shell of the driving device 20, and a hook 23 is connected to one end of the traction rope 22.

[0057] The side of the device body 21 facing the guide component 10 is fixedly provided with a guide wheel set 30 through bolts or other structures, and the guide wheel set 30 is guided in cooperation with the guide component 10. The reduction motor works to drive the winding drum to rotate, so as to wind and unwind the traction rope 22, and make the driving device 20 move up and down along the guide direction of the guide component 10.

[0058] Among them, the guide wheel set 30 is arranged in pairs, such as Figure 3 and Figure 4As shown in the embodiment of the utility model, four guiding wheel groups 30 are provided in total, two of which are symmetrically arranged at the bottom of the driving device 20, and the other two are symmetrically arranged at the top of the driving device 20. When the driving device 20 runs along the guide rail 11, each guiding wheel group 30 provides guiding and supporting functions for the driving device 20. The structure of the guiding wheel group 30 can be adaptively adjusted according to the structure of the guide rail 11, which will not be illustrated one by one here.

[0059] In order to ensure the safety of high-altitude operation and avoid over-speed operation of the lifting device, the trigger assembly 40 provided by the embodiment of the utility model can be arranged between the two guiding wheel groups 30 symmetrically arranged at the top of the driving device 20, and at least one end of the trigger assembly 40 is provided with the anti-falling assembly 50. The trigger assembly 40 provided by the embodiment of the utility model can also be arranged between the two guiding wheel groups 30 symmetrically arranged at the bottom of the driving device 20, and at least one end of the trigger assembly 40 is provided with the anti-falling assembly 50.

[0060] In some embodiments of the utility model, the trigger assembly 40 provided by the embodiment of the utility model is arranged between the two guiding wheel groups 30 symmetrically arranged near the top of the driving device 20, and at least one end of the trigger assembly 40 is provided with the anti-falling assembly 50. The traction rope 22 of the driving device 20 is hung on the top of the guiding part 10 through the hook 23, and the reduction motor inside the driving device 20 drives the winding drum to rotate, so that the traction rope 22 is stretched out or retracted, and the lifting device including the driving device 20 moves freely along the guiding part 10. When the lifting device encounters a stall and falls, the trigger assembly 40 drives the anti-falling assembly 50 to rotate, and cooperates with the guiding part 10 to realize locking.

[0061] Figure 5 is one of the structural schematic diagrams of the anti-falling mechanism provided by the embodiment of the utility model. Figure 6 is the second structural schematic diagram of the anti-falling mechanism provided by the embodiment of the utility model.

[0062] Referring to Figure 5 and Figure 6 , the embodiment of the utility model provides an anti-falling mechanism, which comprises two guiding wheel groups 30, a trigger assembly 40 and an anti-falling assembly 50.

[0063] The two guiding wheel groups 30 are adapted to be mounted to the driving device 20, and the two guiding wheel groups 30 are arranged oppositely. The trigger assembly 40 comprises a crankshaft 41 and a trigger wheel group 42, the crankshaft 41 is located between the two guiding wheel groups 30 arranged oppositely, the crankshaft 41 is in rotating cooperation with each guiding wheel group 30, the trigger wheel group 42 is arranged on the crankshaft 41, and the traction rope 22 of the driving device 20 is arranged through the trigger wheel group 42.

[0064] The anti-falling assembly 50 is arranged at least one end of the crankshaft 41, that is, the anti-falling assembly 50 can be arranged at any one end of the crankshaft 41, or can be arranged at both ends of the crankshaft 41. The anti-falling assembly 50 comprises a locking piece 51 and an elastic piece 52, the locking piece 51 is fixed to the crankshaft 41, that is, the locking piece 51 is relatively fixed with the crankshaft 41, and the rotation of the crankshaft 41 can synchronously drive the rotation of the locking piece 51, and the rotation center of the locking piece 51 is eccentrically arranged, and the elastic piece 52 is sleeved on the crankshaft 41.

[0065] When the traction rope 22 is in a tension state, the trigger wheel set 42 is subjected to extrusion to drive the rotation of the crankshaft 41, the crankshaft 41 drives the locking piece 51 to deviate away from the guide component 10, so that a gap is reserved between the locking piece 51 and the guide component 10, and at this time, the elastic piece 52 is in an elastic deformation state, that is, the elastic piece 52 has the ability to restore the elastic deformation.

[0066] When the traction rope 22 is in a relaxed state, the extrusion on the trigger wheel set 42 disappears, the elastic piece 52 restores the elastic deformation to drive the rotation of the crankshaft 41, the crankshaft 41 drives the locking piece 51 to deviate towards the guide component 10, so that the locking piece 51 is abutted to the guide component 10 to realize locking.

[0067] In the anti-falling mechanism provided by the utility model, the crankshaft 41 serves as a core component and bears the functions of energy conversion and torque transmission. The crankshaft 41 can convert the force applied by the elastic piece 52 into energy for controlling the rotation of the locking piece 51, so that the locking piece 51 cooperates with the guide component 10 to realize locking.

[0068] The crankshaft 41 can convert a small force into a large output torque, realize rapid locking, and improve the locking efficiency of the whole lifting equipment. Moreover, the crankshaft 41 can effectively offset the vibration and imbalance caused by asymmetric force, and ensure the smoothness of the locking movement process. Meanwhile, the crankshaft 41 is easy to assemble and disassemble, can simplify the maintenance process of the anti-falling mechanism, and reduce the operation cost of the anti-falling mechanism. The crankshaft 41 can be made of high-strength alloy steel, has good wear resistance and toughness, can bear high-strength cyclic load, and ensures continuous and reliable operation in harsh environments.

[0069] In the anti-falling mechanism, the eccentric locking member 51 generates a large torque, instantaneously increases the friction force or the engagement force of the contact surface with the guide component 10, quickly abuts against the guide component 10 to prevent the movement of the driving device 20, and realizes the anti-falling locking of the lifting equipment including the driving device 20. The eccentric locking member 51 is arranged on the crankshaft 41, and the rotation center of the locking member 51 is away from the actual force action line, thereby generating a force arm effect. According to the lever law, a small input force can generate a large output force, so that the locking member 51 is instantaneously locked. In addition, the close contact area formed between the locking member 51 and the guide wheel set 30 after the locking member 51 is closed is increased, the damping effect is further enhanced, the movement of the driving device 20 is effectively prevented, and finally the emergency braking is realized.

[0070] In the anti-falling mechanism, the elastic member 52 can be a torsion spring, which is a spiral-shaped component made of a metal wire or other elastic material and can withstand torsional stress. When the torsion spring is subjected to an external force, it will deform, and after the force disappears, it can return to the original shape. When the lifting equipment falls accidentally, the torsion spring quickly releases the stored energy, generates a reverse torque, and promotes the crankshaft 41 to drive the locking member 51 to start immediately, lock the movement of the driving device 20, and prevent the whole lifting equipment from falling further. After experiencing a falling accident, the torsion spring can automatically return to the initial state and be ready for the next possible emergency response, without the need for manual intervention to continuously provide safety protection.

[0071] It can be understood that the anti-falling mechanism provided by the embodiment of the utility model, through setting the crankshaft 41 between the two guide wheel sets 30 arranged oppositely, and making the crankshaft 41 rotate with the corresponding guide wheel set 30, the trigger wheel set 42 is arranged on the crankshaft 41;The anti-falling assembly 50 is arranged at least one end of the crankshaft 41, the anti-falling assembly 50 includes the locking member 51 and the elastic member 52, the locking member 51 is fixed to the crankshaft 41, the rotation center of the locking member 51 is arranged eccentrically, and the elastic member 52 is sleeved on the crankshaft 41.

[0072] When the traction rope 22 is in a tension state, the trigger wheel set 42 is driven by the friction (extrusion) of the traction rope 22 to rotate the crankshaft 41, the crankshaft 41 drives the locking member 51 to deviate away from the guide component 10, so that the locking member 51 and the guide component 10 have a gap, and the driving device 20 can move normally along the guide component 10, at this time, the elastic member 52 is in an elastic deformation state, that is, the elastic member 52 has the ability to restore the elastic deformation.

[0073] When the traction rope 22 is in a relaxed state, the friction (extrusion) of the traction rope 22 on the trigger wheel set 42 disappears, the elastic member 52 restores the elastic deformation to drive the crankshaft 41 to rotate, the crankshaft 41 drives the locking member 51 to deviate towards the guide component 10, and the locking member 51 is abutted to the guide component 10 to realize locking. The anti-falling mechanism provided by the utility model can realize locking and unlocking functions, has compact structure, low manufacturing cost, small required installation space, and can be widely applied to lifting equipment with guide rails 11.

[0074] Figure 7 It is the top view of the anti-falling mechanism provided by the utility model embodiment.

[0075] Referring to Figures 5 to 7 In some embodiments of the utility model, the guide wheel set comprises a mounting bracket 31, a side guide wheel 32 and a back wheel 33, the mounting bracket 31 is suitable for being mounted to the device body 21 of the driving device 20, the side guide wheel 32 and the back wheel 33 are both mounted on the mounting bracket 31, and the axes of the side guide wheel 32 and the back wheel 33 are perpendicular to each other, the side guide wheel 32 can move along the side of the guide component 10, and the back wheel 33 can move along the back of the guide component 10.

[0076] The inside of the mounting bracket 31 is constructed with a avoiding cavity 311, the crankshaft 41 extends to the avoiding cavity 311 through the mounting bracket 31, and the locking member 51 is located in the avoiding cavity 311 and is oppositely arranged with the back wheel 33. In this way, the back wheel 33 can provide reliable support for the locking process of the locking member 51, so as to improve the stability of locking.

[0077] That is to say, the back wheel 33 is located in front of the locking member 51. When the traction rope 22 is in a relaxed state, the friction (extrusion) of the traction rope 22 on the trigger wheel set 42 disappears, the elastic member 52 restores the elastic deformation to drive the crankshaft 41 to rotate, the crankshaft 41 drives the locking member 51 to deviate towards the guide component 10, and under the joint action of the locking member 51 and the back wheel 33, the locking member 51 can be locked on the surface of the guide component 10 instantaneously.

[0078] During the locking process, the locking member 51 extrudes the guide component 10 from the front, the back wheel 33 extrudes the guide component 10 from the back, and the guide component 10 is stably kept between the locking member 51 and the back wheel 33, so as to facilitate the locking member 51 to cooperate with the guide component 10 to lock.

[0079] It should be noted that, since the rotation frequency of the crankshaft 41 and the mounting bracket 31 is low, a through hole can be directly formed in the mounting bracket 31, so that the crankshaft 41 extends into the avoiding cavity 311 in the inside of the mounting bracket 31. In order to reduce the friction of the crankshaft 41 and the mounting bracket 31, a bearing can also be embedded between the crankshaft 41 and the mounting bracket 31.

[0080] With reference to Figures 5 to 7 In some embodiments of the present application, the mounting bracket 31 comprises a first bracket body 312 and a second bracket body 313 connected to each other, and the first bracket body 312 and the second bracket body 313 are arranged perpendicular to each other.

[0081] The back wheel 33 is arranged on the first bracket body 312, the side guide wheel 32 is arranged on the second bracket body 313, the second bracket body 313 is adapted to be connected to the housing of the driving device 20, the avoiding cavity 311 is arranged inside the second bracket body 313, the crankshaft 41 passes through the first bracket body 312 and the second bracket body 313 and extends into the avoiding cavity 311, the locking member 51 and the following pressing wheel 34 are both sleeved on the crankshaft 41 and located in the avoiding cavity 311, so that the structure is more compact and occupies less space.

[0082] Further, the second bracket body 313 can further comprise a first sub-bracket body and a second sub-bracket body connected to each other, the first sub-bracket body is connected to the first bracket body 312, and the first sub-bracket body is adapted to be mounted to the housing of the driving device 20, and the avoiding cavity 311 is arranged inside the first sub-bracket body. The side guide wheel 32 is arranged on the second sub-bracket body, and the side guide wheel 32 is mounted on the second sub-bracket body without extending to the bottom of the first sub-bracket body, so as to avoid interference between the mounting member of the side guide wheel 32 and the housing of the driving device 20.

[0083] Figure 8 is a partial structure schematic view of the anti-falling mechanism provided by the embodiments of the present application. Figure 9 is Figure 8 is an exploded schematic view of the partial structure of the anti-falling mechanism shown.

[0084] With reference to Figure 8 and Figure 9 In some embodiments of the present application, in order to further improve the locking efficiency of the locking member 51, the guide wheel set 30 further comprises a pressing wheel 34, the pressing wheel 34 is located in the avoiding cavity 311, the pressing wheel 34 is arranged on the crankshaft 41 and keeps relative rotation with the crankshaft 41, that is, when the crankshaft 41 is fixed, the pressing wheel 34 rolls along the guide member 10.

[0085] Among them, the pressing wheel 34 is arranged in a spaced manner with the locking member 51 and located on the outside of the locking member 51. The pressing wheel 34 can be assembled on the crankshaft 41 through a bearing and keep relative rotation with the crankshaft 41.

[0086] When the traction rope 22 is in a relaxed state, the friction (extrusion) effect of the traction rope 22 on the trigger wheel set 42 disappears, the elastic member 52 restores the elastic deformation to drive the crankshaft 41 to rotate, the crankshaft 41 drives the locking member 51 to deviate towards the guide member 10, and under the joint action of the locking member 51, the back wheel 33 and the pressing wheel 34, the locking member 51 can be instantaneously locked on the surface of the guide member 10.

[0087] In the locking process, the locking member 51 and the pressing wheel 34 press the guide component 10 from the front side, and the back wheel 33 presses the guide component 10 from the back side, so that the guide component 10 is stably held between the locking member 51, the pressing wheel 34 and the back wheel 33, and the side of the guide component 10 away from the locking member 51 is prevented from being warped, thereby facilitating the cooperation between the locking member 51 and the guide component 10 for locking.

[0088] Further, the pressing wheel 34 is provided with a spacer 35 on both sides, and the spacer 35 is sleeved on the crankshaft 41, so as to limit the pressing wheel 34 through the spacers 35 on the left and right sides of the pressing wheel 34, that is, the spacers 35 are used for positioning the pressing wheel 34, so as to ensure that the pressing wheel 34 is correctly aligned along the axis, and deviation or axial movement is avoided.

[0089] Referring to Figure 9 In some embodiments of the utility model, the crankshaft 41 comprises a main shaft 411, end shafts 412 and a journal 413, the end shafts 412 are located at opposite ends of the main shaft 411, and the journal 413 is connected between the main shaft 411 and the end shafts 412, so that the main shaft 411 and the end shafts 412 are not on the same straight line.

[0090] The end shaft 412 is rotationally connected with the corresponding mounting bracket 31, the trigger wheel set 42 is fixed to the main shaft 411 and located at a position close to the middle of the main shaft 411, the main body of the elastic member 52 is sleeved on the end shaft 412, one end of the elastic member 52 is hooked on the journal 413, and the other end of the elastic member 52 is connected with the mounting bracket 31.

[0091] Correspondingly, the elastic member 52 is located outside the mounting bracket 31 of the guide wheel set 30, so that the structure size of the mounting bracket 31 and the whole guide wheel set 30 can be reduced, the installation space is saved, and the application of the anti-falling mechanism to the lifting equipment is facilitated.

[0092] Referring to Figure 9 In some embodiments of the utility model, the anti-falling assembly 50 further comprises a baffle 53, the baffle 53 is sleeved on the crankshaft 41, and the baffle 53 is located between the elastic member 52 and the corresponding mounting bracket 31 of the guide wheel set 30.

[0093] The baffle 53 is a planar or annular component fixed on the crankshaft 41, is connected with one end of the elastic member 52, is used for determining the maximum compression or expansion limit of the elastic member 52, prevents the elastic member 52 from being damaged due to excessive contraction, and ensures that the elastic member 52 is always in a preloaded state and maintains the required elastic response.

[0094] Referring to Figure 9In some embodiments of the utility model, locking piece 51 includes cam main part, cam main part is connected through key on end shaft 412 of crankshaft 41, cam main part can also be set on crankshaft 41 by interference fit, such as at least one connecting plane is equipped on crankshaft 41, connecting hole that is suitable with the shape of crankshaft 41 is set up on cam main part, and crankshaft 41 is inserted in the connecting hole.

[0095] The cam surface of the cam main part away from the rotation center is provided with a plurality of locking teeth 511, and the locking teeth 511 are adapted to be locked to the guide member 10 when the traction rope 22 is in a relaxed state, so as to increase the locking capacity.

[0096] Among them, the surface of the cam main part can be provided with a friction element to increase the locking capacity, or the cam main part is made of a friction material element with large friction.

[0097] Continue to refer to Figure 5 And Figure 6 In some embodiments of the utility model, the trigger wheel set 42 includes a support frame 421, a trigger wheel 422 and an anti-disengagement piece 423, the support frame 421 is fixedly arranged on the crankshaft 41, that is, the support frame 421 can be welded and fixed on the crankshaft 41 to form an integrated structure with the crankshaft 41.

[0098] The trigger wheel 422 and the anti-disengagement piece 423 are arranged on the support frame 421, and a gap for the traction rope 22 to pass through is arranged between the trigger wheel 422 and the anti-disengagement piece 423, the trigger wheel 422 can rotate relative to the support frame 421, and the anti-disengagement piece 423 can be fixed on the support frame 421 or can rotate relative to the support frame 421.

[0099] In this embodiment, the trigger wheel 422 and the anti-disengagement piece 423 can be connected to the support frame 421 by a bolt with an optical axis, and the anti-disengagement piece 423 is limited by a spacer sleeve.

[0100] Continue to refer to Figures 5 to 9The anti-falling mechanism provided by the embodiment of the utility model is installed by first installing the installation support 31 of the guide wheel set 30 at the position close to the top of the driving device 20, the crankshaft 41 is threaded through the two installation supports 31 arranged oppositely, the pressing wheel 34 and the locking member 51 are sequentially threaded and installed on the crankshaft 41 and are separated by the spacer sleeve 35, the spacer sleeve 35 is also arranged on the outside of the pressing wheel 34, and the outside spacer sleeve 35 is limited by the stop pin. The baffle 53 is arranged on the inside of the installation support 31, the elastic member 52 is installed on the position close to the inside of the crankshaft 41 and adheres to the baffle 53, the rotating arm at one end of the elastic member 52 is hung on the journal 413 of the crankshaft 41, the rotating arm at the other end of the elastic member 52 is supported on the corresponding position of the installation support 31, and the effect of generating a reset torque is ensured. Meanwhile, the baffle 53 can also limit the movement of the installation support 31 and other components on the crankshaft 41. The trigger wheel 422 is installed on the support frame 421 in the middle of the crankshaft 41 through a shaft and is spaced apart from the anti-falling member 423.

[0101] When the lifting device works normally, the driving traction rope 22 threaded between the trigger wheel 422 and the anti-falling member 423 is in a tensioned or strained state, at this time, the trigger wheel 422 installed on the crankshaft 41 generates a rotating displacement amount with the crankshaft 41 as the axis center, the rotating displacement amount is threaded through the installation holes of the two installation supports 31 at the two ends, and the rotating displacement amount is caused by the extrusion force of the traction rope 22 (such as a steel wire rope), thereby driving the crankshaft 41 and the locking member 51 and the pressing wheel 34 installed thereon to rotate by a certain angle synchronously, under the influence of the rotating displacement amount, the locking member 51 is offset towards the direction away from the guide component 10, and the locking member 51 and the surface of the guide component 10 keep a large enough gap so as not to be locked by mistake.

[0102] When the traction rope 22 (such as a steel wire rope) is broken or the top hook 23 is detached, the driving traction rope 22 changes from the strained state to the relaxed state, that is, the free state, the extrusion force on the trigger wheel 422 disappears, the trigger wheel 422 generates a rotating displacement amount opposite to that in the normal working state under the torsion force of the elastic member 52, thereby driving the crankshaft 41 and the locking member 51 and the pressing wheel 34 installed thereon to rotate by a certain angle synchronously, at this time, the locking member 51 is offset towards the direction close to the guide component 10, the locking member 51 and the guide component 10 abut, and with the increase of the rotating displacement amount, the extrusion friction force between the locking member 51 and the contact surface of the guide component 10 becomes larger and larger, with the locking teeth 511 of the locking member 51 penetrating the contact surface of the guide component 10 more and more deeply, the contact surface of the guide component 10 generates resistance to the locking member 51, the locking member 51 and the guide rail 11 of the guide component 10 no longer relatively move, and the driving device 20 is prevented from continuing to fall, thereby achieving the locking purpose. During the locking process, the anti-falling assemblies 50 symmetrically arranged on the left and right sides jointly act to lock, and the structure runs more stably.

[0103] When the steel wire rope needs to be unlocked, the driving device 20 is operated to move upward (electrically or manually), the trigger wheel 422 on the crankshaft 41 is squeezed by the traction rope 22 (such as a steel wire rope) to generate a rotational displacement amount with the mounting hole of the mounting bracket 31 penetrating the two ends of the crankshaft 41 as the axis, so that the eccentric locking part 51 moves away from the surface of the guide part 10, thereby achieving the unlocking operation.

[0104] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for 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 embodiments of the present application.

Claims

1. A fall arrest mechanism, characterized in that, include: Two guide wheel sets are adapted to be installed on the drive device, and the two guide wheel sets are arranged opposite to each other; A trigger assembly includes a crankshaft and a trigger wheel assembly. The crankshaft is located between two oppositely arranged guide wheel assemblies. The crankshaft is rotatably engaged with each of the guide wheel assemblies. The trigger wheel assembly is disposed on the crankshaft. The traction rope of the drive device passes through the trigger wheel assembly. A fall arrestor assembly is disposed at at least one end of the crankshaft. The fall arrestor assembly includes a locking member and an elastic member. The locking member is disposed on the crankshaft and is relatively fixed to the crankshaft. The rotation center of the locking member is eccentrically set. The elastic member is sleeved on the crankshaft. When the traction rope is in a tensioned state, there is a gap between the locking member and the guiding member, and the elastic member is in an elastic deformation state. When the traction rope is in a slack state, the elastic element restores its elastic deformation to drive the crankshaft to rotate, causing the locking element to abut against the guide component to achieve locking.

2. The fall arrest device of claim 1, wherein, The guide wheel assembly includes a mounting bracket, side guide wheels, and a back wheel; The mounting bracket is adapted to be installed on the drive device, and both the side guide wheel and the back wheel are mounted on the mounting bracket, with the axes of the side guide wheel and the back wheel being perpendicular to each other; The mounting bracket has an internal clearance cavity, the crankshaft extends into the clearance cavity, the locking member is located in the clearance cavity and is disposed opposite to the back wheel.

3. The fall arrest device of claim 2, wherein, The guide wheel assembly also includes a pressure wheel, which is located in the clearance cavity and is disposed on the crankshaft, maintaining relative rotation with the crankshaft; the pressure wheel is spaced apart from the locking member.

4. The fall arrest device of claim 3, wherein, Both sides of the pressure roller are provided with spacers, which are fitted onto the crankshaft.

5. The fall arrest device of claim 2, wherein, The crankshaft includes a main shaft, end shafts, and journals. The end shafts are located at opposite ends of the main shaft, and the journals are connected between the main shaft and the end shafts. The end shaft is rotatably engaged with the corresponding mounting bracket, and the trigger wheel assembly is fixed to the main shaft; the main body of the elastic element is sleeved on the end shaft, one end of the elastic element is hooked onto the journal, and the other end of the elastic element is connected to the mounting bracket.

6. The fall arrest device of claim 1, wherein, The anti-fall assembly also includes a baffle plate, which is sleeved on the crankshaft and located between the elastic element and the mounting bracket of the corresponding guide wheel assembly.

7. A fall arrest device according to any one of claims 1 to 6, wherein, The locking component includes a cam body, which is fixedly connected to the crankshaft. The cam body has a plurality of locking teeth spaced apart on the cam surface away from the rotation center. The locking teeth are adapted to abut against the guide component to lock when the traction rope is in a slack state.

8. A fall arrest device according to any one of claims 1 to 6, wherein, The trigger wheel assembly includes a support frame, trigger wheels, and anti-detachment components; The support frame is fixedly mounted on the crankshaft, and the trigger wheel and the anti-detachment component are mounted on the support frame, with the trigger wheel and the anti-detachment component spaced apart. The traction rope of the drive device is threaded between the trigger wheel and the anti-detachment component.

9. A drive apparatus characterized by comprising: It includes a device body and a fall protection mechanism as described in any one of claims 1 to 8, wherein the fall protection mechanism is fixedly disposed on the device body.

10. An elevating apparatus characterized by The driving device of claim 9, wherein the guide component is provided with a guide groove, and the traction rope of the driving device is hung on the guide groove; and the guide wheel set of the anti-falling mechanism is adapted to move along the extension direction of the guide component.

Images