Anti-falling mechanism, driving device and lifting equipment

Abstract

The invention 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 a fixed main body, a trigger assembly and an anti-falling assembly; the fixed main body is mounted on the guide wheel group; the trigger assembly comprises a trigger shaft, a speed measurement pressing wheel and a trigger part, the trigger shaft is rotatably arranged on the fixed main body, and the speed measurement pressing wheel and the trigger part are both arranged on the trigger shaft; the anti-falling assembly comprises a locking piece and an elastic piece, the locking piece is rotatably arranged on the fixed main body, the rotating center of the locking piece is eccentrically arranged, and the elastic piece is connected with the fixed main body and the trigger component; when the driving device stalls and falls, the speed measuring pressing wheel drives the triggering part to accelerate through the triggering shaft, and when the rotating speed of the triggering part reaches the preset triggering rotating speed, the triggering part drives the locking part to overcome the elastic force of the elastic part to rotate, and the locking part abuts against the guiding part to achieve locking. The lifting device is compact in structural arrangement, low in manufacturing cost, small in needed installation space and capable of being widely applied to lifting devices with guide rails.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting equipment, and in particular to an anti-falling mechanism, a driving device and a lifting equipment. Background Art

[0002] In the wind power, construction and other industries, in order to ensure the safety of workers working at heights, a reliable anti-fall mechanism is installed on the lifting equipment used for high-altitude operations. The anti-fall mechanism is used to limit the lifting equipment from falling at excessive speed, so as to prevent the lifting equipment from falling due to accidents such as motor failure and wire rope breakage.

[0003] In the related art, the anti-fall mechanism configured for the lifting equipment has a relatively complex structure, occupies a large space, has a high manufacturing cost, and is inconvenient to install and maintain. As a result, some lifting equipment cannot be equipped with an anti-fall mechanism due to purchase cost or structural space limitations. Summary of the invention

[0004] The first aspect of the present invention provides an anti-fall mechanism to solve the above-mentioned technical defects in the prior art. The anti-fall mechanism not only has a compact structure, low manufacturing cost, and small installation space, and can be widely used in lifting equipment with guide rails; it can also achieve the purpose of buffering locking and reduce the impact effect during the locking process.

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

[0006] A third aspect of the present invention provides a lifting device.

[0007] A first aspect of the present invention provides an anti-falling mechanism, comprising a fixed body, a trigger assembly and an anti-falling assembly.

[0008] The fixed body is adapted to be mounted to the drive device; The trigger assembly comprises a trigger shaft, a speed measuring pressure wheel and a trigger component, wherein the trigger shaft is rotatably arranged on the fixed body, and the speed measuring pressure wheel and the trigger component are both arranged on the trigger shaft; The anti-falling assembly comprises a locking member and an elastic member, wherein the locking member is rotatably arranged inside the fixed body, the rotation center of the locking member is eccentrically arranged, one end of the elastic member is connected to the fixed body, and the other end of the elastic member is connected to the trigger component; When the driving device loses speed and falls, the speed measuring wheel drives the trigger component to accelerate through the trigger shaft. When the rotation speed of the trigger component reaches a preset trigger speed, the trigger component drives the locking member to overcome the elastic force of the elastic member and rotate, so that the locking member abuts against the guide member to achieve locking.

[0009] According to the anti-falling mechanism provided by the present invention, the trigger component includes a centrifugal throw block and a trigger sleeve; The centrifugal block is arranged on the trigger shaft and is suitable for rotating with the trigger shaft. The trigger sleeve is rotatably arranged on the trigger shaft. The trigger sleeve cover is arranged on the outer side of the centrifugal block. The other end of the elastic member is connected to the trigger sleeve. When the driving device stalls and falls, the speed measuring wheel drives the centrifugal block to accelerate through the trigger shaft. When the rotation speed of the centrifugal block reaches the preset trigger speed, the centrifugal block opens and abuts against the trigger sleeve to drive the trigger sleeve to rotate. The trigger sleeve drives the locking member to overcome the elastic force of the elastic member and rotate, so that the locking member abuts against the guide member to achieve locking.

[0010] According to the anti-falling mechanism provided by the present invention, the trigger sleeve comprises a sleeve body and a trigger lever, and the trigger lever is arranged on the outer circumferential surface of the sleeve body; The locking member is provided with a trigger groove, the center line of which is located on a virtual circle with the rotation center of the locking member as the center, and the trigger lever is passed through the trigger groove to drive the locking member to rotate through the trigger groove.

[0011] According to the anti-fall mechanism provided by the present invention, a guide groove is provided on the fixed body, the position of the guide groove corresponds to the position of the trigger groove, the arc length of the center line of the guide groove on the virtual circle is greater than the arc length of the center line of the trigger groove on the virtual circle, and the trigger lever is sequentially inserted into the guide groove and the trigger groove.

[0012] According to the anti-falling mechanism provided by the present invention, the locking member comprises a cam body, and the cam body is rotatably arranged inside the fixed body; A plurality of locking teeth are arranged at intervals on a cam surface of the cam body away from the rotation center, and the locking teeth are suitable for abutting against the guide component.

[0013] According to the anti-falling mechanism provided by the present invention, a limiting portion is provided on a side of the cam body away from the locking tooth; A limiting piece is disposed on the fixed body, the limiting piece is located on the rotation path of the cam body, and the limiting portion is suitable for abutting against the limiting piece.

[0014] According to the anti-falling mechanism provided by the present invention, the interior of the fixed body defines a receiving cavity, the trigger shaft is passed through the fixed body, and is rotatably arranged on the fixed body through a corresponding bearing; The locking member is located in the accommodating cavity and is rotatably matched with the trigger shaft through a shaft sleeve; The speed measuring pressure wheel is located on one side of the fixed body, and the trigger component is located on the other side of the fixed body opposite to the one side.

[0015] A second aspect of the present invention provides a driving device, comprising a device body and any one of the anti-falling mechanisms described above, wherein the device body is provided with a guide wheel group, and the anti-falling mechanism is fixedly arranged on the guide wheel group.

[0016] According to the driving device provided by the present invention, the guide wheel group includes a mounting bracket, a side guide wheel and a back wheel, the mounting bracket is fixed to the device body, the side guide wheel and the back wheel are both mounted on the mounting bracket, and the axes of the side guide wheel and the back wheel are perpendicular to each other; The anti-falling mechanism is fixed to the mounting bracket, and the speed measuring pressure wheel of the anti-falling mechanism and the back wheel are arranged opposite to each other.

[0017] A third aspect of the present invention provides a lifting device, comprising a guide component and the driving device, wherein a traction rope of the driving device is hung on the guide component, and the guide wheel group is suitable for moving along the extension direction of the guide component.

[0018] The anti-fall mechanism provided by the present invention is characterized in that a trigger shaft is rotatably arranged on a fixed body, a speed measuring pressure wheel and a trigger component are arranged on the trigger shaft; a locking member of the anti-fall assembly is rotatably arranged inside the fixed body, and the rotation center of the locking member is eccentrically arranged, one end of the elastic member is connected to the fixed body, and the other end of the elastic member is connected to the trigger component. The anti-fall mechanism has a compact structure, low manufacturing cost, and small installation space, and can be widely used in lifting equipment with guide rails.

[0019] When the driving device stalls and falls, the rotation speed of the trigger component reaches the preset trigger speed, and the trigger component drives the locking component to overcome the elastic force of the elastic component to rotate, so that the locking component abuts against the guide component to achieve locking. During the locking process, the trigger component indirectly drives the locking component to overcome the elastic force of the elastic component to rotate and lock, so that the contact surface of the locking component and the guide component form a progressive contact, and the process from the locking component starting to contact the contact surface of the guide component to complete locking is elongated, thereby achieving the purpose of buffer locking, reducing the impact effect during the locking process, and improving the safety of the driving device.

[0020] The driving device and lifting equipment provided by the present invention respectively include the above-mentioned locking mechanism and thus have all the above-mentioned advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 structural schematic diagram of a lifting device provided in an embodiment of the present invention.

[0023] Figure 2 It is one of the partial structural schematic diagrams of the lifting device provided in the embodiment of the present invention.

[0024] Figure 3 This is the second partial structural schematic diagram of the lifting device provided in the embodiment of the present invention.

[0025] Figure 4 yes Figure 3 A front view of the partial structure of the lifting device.

[0026] Figure 5 It is a schematic diagram of installing the anti-fall mechanism provided by an embodiment of the present invention on a guide wheel group.

[0027] Figure 6 yes Figure 5 Sectional view along line AA.

[0028] Figure 7 It is a structural schematic diagram of the anti-fall mechanism provided in an embodiment of the present invention.

[0029] Figure 8 It is a schematic diagram of the structural explosion of the anti-fall mechanism provided in an embodiment of the present invention.

[0030] Fig. 9 It is a cross-sectional view of the anti-fall mechanism provided by an embodiment of the present invention.

[0031] Fig.10 It is a structural schematic diagram of the anti-fall mechanism provided by an embodiment of the present invention in a normal use state.

[0032] Fig.11 yes Fig.10 Sectional view along line BB.

[0033] Fig.12 It is a structural schematic diagram of the anti-fall mechanism provided by an embodiment of the present invention in a locked trigger state.

[0034] Fig.13 yes Fig.12 Cross-sectional view along line CC.

[0035] Reference numerals: 10. Guide component; 11. Guide rail; 12. Tread roller; 20. driving device; 21. device body; 22. traction rope; 23. hook; 30. Guide wheel assembly; 31. Mounting bracket; 32. Side guide wheel; 33. Back wheel; 40. Anti-fall mechanism; 41. Fixed body; 411. Accommodating cavity; 412. Guide groove; 413. Limiting member; 414. Mounting hole; 42. Trigger assembly; 421. Trigger shaft; 422. Speed ​​measuring roller; 423. Centrifugal block; 424. Trigger sleeve; 4241. Sleeve body; 4242. Trigger lever; 4243. Baffle; 4244. Block; 43. Anti-fall assembly; 431. Locking member; 4311. Trigger groove; 4312. Locking tooth; 4313. Limiting part; 432. Elastic member; 44. First bearing; 45. Second bearing; 46. Third bearing; 47. Spacer; 48. Bushing. DETAILED DESCRIPTION

[0036] 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.

[0037] 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 a direct connection or an indirect connection 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.

[0038] 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.

[0039] 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.

[0040] Figure 1 It is a structural schematic diagram of a lifting device provided in an embodiment of the present invention. Figure 2 It is one of the partial structural schematic diagrams of the lifting device provided in the embodiment of the present invention. Figure 3 This is the second partial structural schematic diagram of the lifting device provided in the embodiment of the present invention. Figure 4 yes Figure 3 A front view of the partial structure of the lifting device.

[0041] See also Figures 1 to 4 On the one hand, the present invention provides a lifting device, which can be a non-climbing device, a tower climbing machine, an elevator, etc. The lifting device can be used in the inside of the tower of a wind turbine, industrial buildings, maintenance and inspection of aircraft in the aviation industry, in high-altitude working environments of facilities such as oil drilling platforms and storage tanks, and in power transmission and other fields.

[0042] The lifting device includes a guide component 10 and a driving device 20. The driving device 20 is mounted on the guide component 10 and can perform lifting and lowering movements along the guiding direction of the guide component 10. The lifting device can be connected to a corresponding transport carrier on the driving device 20 according to the use environment and the carrier used. For example, a transport platform is connected to the driving device 20. The transport platform can carry materials (tools) or maintenance personnel. The transport platform is usually designed with fences and pedals to provide sufficient standing space and meet safety requirements.

[0043] The guide component 10 may be a ladder, which includes two vertical beams arranged opposite to each other and a step roller 12 connected between the two vertical beams at intervals. The vertical beams of the ladder may be used as guide rails 11, or guide rails 11 and other guide elements may be independently installed on the vertical beams of the ladder, and the guide rails 11 may be used to guide the lifting device as a whole to move along a predetermined path, thereby ensuring the accuracy and stability of the motion trajectory.

[0044] The driving device 20 is the power unit of the entire lifting equipment. The driving device 20 includes 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 to a drum, and a traction rope 22 (such as a wire rope or a chain) is fixed and wound on the drum. The traction rope 22 extends from the shell of the driving device 20, and a hook 23 is connected to the extended end.

[0045] A guide wheel set 30 is fixedly provided on one side of the device body 21 facing the guide component 10 by bolts or other structures, and the guide wheel set 30 cooperates with the guide component 10. The reduction motor works to drive the reel to rotate, so as to retract and release the traction rope 22, so that the driving device 20 moves up and down along the guide direction of the guide component 10.

[0046] Among them, the guide wheel groups 30 are arranged in pairs, such as Figure 3 and Figure 4 As shown, in the embodiment of the present invention, there are four guide wheel groups 30, two of which are symmetrically arranged at the bottom of the driving device 20, and the other two guide wheel groups 30 are symmetrically arranged at the top of the driving device 20. When the driving device 20 runs along the guide rail 11, each guide wheel group 30 provides guidance and support for the driving device 20. The structure of the guide wheel group 30 can be adaptively adjusted according to the structure of the guide rail 11, and will not be illustrated one by one here.

[0047] In order to ensure the safety of aerial work and prevent the lifting equipment from overspeeding, an anti-fall mechanism 40 provided by an embodiment of the present invention may be provided in at least one of the above-mentioned guide wheel groups 30, that is, at least one anti-fall mechanism 40 provided by an embodiment of the present invention is provided in the lifting equipment.

[0048] For example, the anti-fall mechanism 40 provided by the embodiment of the present invention can be respectively set on the two guide wheel groups 30 at the bottom of the driving device 20; the anti-fall mechanism 40 provided by the embodiment of the present invention can also be set on any one of the two guide wheel groups 30 at the bottom of the driving device 20; and the anti-fall mechanism 40 provided by the embodiment of the present invention can also be set on all the guide wheel groups 30.

[0049] In some embodiments of the present invention, the anti-fall mechanism 40 provided by the embodiment of the present invention is provided on the guide wheel groups 30 on both sides of the left and right sides near the lower side of the driving device 20. The traction rope 22 extended from the driving device 20 is hung on the top of the guide component 10 through the hook 23, and the reduction motor inside the driving device 20 drives the drum to rotate, so that the traction rope 22 is extended or retracted, so that the lifting device including the driving device 20 can move freely along the guide component 10. When the lifting device encounters a stall and falls, the anti-fall mechanism 40 can cooperate with the guide component 10 to achieve locking.

[0050] Figure 5 It is a schematic diagram of installing the anti-fall mechanism provided by an embodiment of the present invention on a guide wheel group. Figure 6 yes Figure 5 Sectional view along line AA.

[0051] See also Figure 5 and Figure 6 In some embodiments of the present invention, the guide wheel group 30 includes a mounting bracket 31, a side guide wheel 32 and a back wheel 33. The mounting bracket 31 can be fixedly mounted on the housing of the driving device 20 by means of bolts and screws. 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 moves along the side of the guide component 10, and the back wheel 33 moves along the back of the guide component 10.

[0052] The anti-fall mechanism 40 is fixedly connected to the inside of the mounting bracket 31 by means of bolts, screws and other structures, and the position of the speed measuring pressure wheel 422 in the anti-fall mechanism 40 corresponds to the position of the back wheel 33 , that is, the back wheel 33 is located directly in front of the speed measuring pressure wheel 422 .

[0053] During use, the speed measuring pressure wheel 422 abuts against the front of the guide rail 11, while the back wheel 33 abuts against the back of the guide rail 11. This means that the speed measuring pressure wheel 422 and the back wheel 33 abut against the front and back of the guide rail 11 at the same time, which can provide two-way support, increase the stability of the operation of the drive device 20, prevent the drive device 20 from offsetting or tilting during movement, and ensure the straightness and accuracy of the operation of the drive device 20. At the same time, the speed measuring pressure wheel 422 and the back wheel 33 can evenly distribute the load, avoid local excessive pressure from damaging the guide rail 11 or causing damage to the guide wheel group 30, and improve the overall load-bearing capacity of the guide rail 11.

[0054] Figure 7 It is a structural schematic diagram of the anti-fall mechanism provided in an embodiment of the present invention. Figure 8 It is a schematic diagram of the structural explosion of the anti-fall mechanism provided in an embodiment of the present invention. Fig. 9 It is a cross-sectional view of the anti-fall mechanism provided by an embodiment of the present invention.

[0055] See also Figures 7 to 9 Another aspect of the present invention provides an anti-falling mechanism 40 , which includes a fixed body 41 , a trigger component 42 and an anti-falling component 43 .

[0056] The fixed body 41 is a mounting carrier of the anti-fall mechanism 40. The fixed body 41 may be a rectangular housing structure. The fixed body 41 may be fixedly connected to the housing of the driving device 20 by bolts, screws, etc., for easy installation and removal. The fixed body 41 has an accommodating cavity 411 inside, which is used to accommodate part of the structure of the anti-fall component 43.

[0057] The trigger assembly 42 includes a trigger shaft 421, a speed measuring pressure wheel 422 and a trigger component. The trigger shaft 421 is rotatably arranged on the fixed body 41, that is, the trigger shaft 421 is allowed to rotate relative to the fixed body 41 while maintaining the positional relationship between the two unchanged. Among them, the trigger shaft 421 can be connected to the fixed body 41 through a radial bearing, such as a deep groove ball bearing, an angular contact bearing or a cylindrical roller bearing. The inner ring of the bearing is fastened to the trigger shaft 421, and the outer ring of the bearing is installed in the inner hole of the fixed body 41, allowing the trigger shaft 421 to rotate freely around its own center line without lateral movement.

[0058] The speed measuring pressure wheel 422 and the trigger component are both arranged on the trigger shaft 421, that is, the speed measuring pressure wheel 422 and the trigger component are fixed on the same trigger shaft 421 through a physical connection, the speed measuring pressure wheel 422 is connected to the trigger shaft 421 through a pin shaft, or the speed measuring pressure wheel 422 is welded and fixed on the trigger shaft 421, and the speed measuring pressure wheel 422 and the trigger shaft 421 remain relatively fixed, that is, the rotation of the speed measuring pressure wheel 422 can drive the trigger shaft 421 to rotate synchronously; correspondingly, the rotation of the trigger shaft 421 can drive the speed measuring pressure wheel 422 to rotate synchronously, so that the speed measuring pressure wheel 422 can measure the lifting and lowering speed of the drive device 20. Once the rotation speed of the speed measuring pressure wheel 422 exceeds the threshold value, it means that the lifting and lowering speed of the drive device 20 exceeds the safety limit at this time, the speed measuring pressure wheel 422 drives the trigger shaft 421 to rotate rapidly, and the trigger component will rotate together with the rotation of the trigger shaft 421.

[0059] In other words, the trigger shaft 421 is arranged through the fixed body 41 and is rotatably arranged on the fixed body 41 through corresponding bearings. The locking member 431 is located in the accommodating cavity 411 and can be rotatably matched with the trigger shaft 421 through the sleeve 48. The speed measuring pressure wheel 422 is arranged on one side of the fixed body 41, and the trigger component is arranged on the other side of the fixed body 41 opposite to the one side, so that the structural arrangement is more compact and occupies less space.

[0060] The anti-falling assembly 43 includes a locking member 431 and an elastic member 432. The locking member 431 is rotatably disposed inside the fixed body 41. The rotation center of the locking member 431 is eccentrically disposed, that is, the center of gravity of the locking member 431 is not on the rotation center.

[0061] The locking member 431 can be sleeved on the trigger shaft 421, rotated with the trigger shaft 421, and eccentrically arranged with the trigger shaft 421; the locking member 431 can also be rotatably arranged on the inner wall of the accommodating cavity 411 by a rotating shaft, and eccentrically arranged relative to the rotating shaft. In this case, the rotating shaft of the locking member 431 is not coaxial with the trigger shaft 421. Therefore, any structural arrangement that can ensure that the locking member 431 rotates relative to the trigger shaft 421 is acceptable.

[0062] The elastic member 432 may be a spring, one end of which is connected to the fixed body 41, and the other end of which is connected to the trigger sleeve 424. By adjusting the design parameters of the elastic member 432, such as the wire diameter, the number of turns, the hardness of the material, etc., different levels of anti-fall performance may be set to adapt to various working environments and load-bearing requirements.

[0063] Fig.10 It is a structural schematic diagram of the anti-fall mechanism provided by an embodiment of the present invention in a normal use state. Fig.11 yes Fig.10 Sectional view along line BB.

[0064] See also Fig.10 and Fig.11 In the normal use state of the anti-fall mechanism 40, the locking member 431 is maintained in the unlocked position by the elastic member 432. In this position, the locking member 431 is received in the accommodating cavity 411 of the fixed body 41, and will not hinder the normal movement of the driving device 20 along the guide rail 11. That is, when the speed measuring pressure wheel 422 runs at a normal speed, the trigger force generated by the trigger component rotating with the trigger shaft 421 is not enough to overcome the resistance brought by the elastic member 432, and the lifting system is in dynamic balance.

[0065] Fig.12 It is a structural schematic diagram of the anti-fall mechanism provided by an embodiment of the present invention in a locked trigger state. Fig.13 yes Fig.12 Cross-sectional view along line CC.

[0066] See also Fig.12 and Fig.13 When an abnormal usage condition occurs, such as the traction rope 22 of the driving device 20 on the lifting equipment breaks, stalls and falls, the speed measuring pressure wheel 422 drives the trigger shaft 421 to rotate rapidly, and the trigger component will rotate together with the rotation of the trigger shaft 421. When the rotation speed of the trigger component meets the preset trigger speed, the trigger component drives the locking member 431 to overcome the elastic force of the elastic member 432 to rotate. Due to the eccentric setting of the locking member 431, the locking member 431 will generate a large torque, instantly increasing the friction force or bite force of the contact surface with the guide member 10, and quickly abutting against the guide member 10 to prevent the driving device 20 from continuing to move, thereby realizing the anti-fall locking of the driving device 20.

[0067] The eccentric setting of the locking member 431 makes the rotation point of the locking member 431 far away from the actual force action line, generating a lever effect. According to the lever law, a smaller input force can generate a larger output force, causing the locking member 431 to lock instantly. In addition, after the locking member 431 is closed, the close contact area formed with the guide member 10 increases, further enhancing the damping effect, effectively preventing the movement of the driving device 20, and finally achieving emergency braking.

[0068] It can be understood that the anti-fall mechanism 40 provided in the embodiment of the present invention is provided by rotatably setting the trigger shaft 421 on the fixed body 41, and setting the speed measuring pressure wheel 422 and the trigger component on the trigger shaft 421; and the locking member 431 of the anti-fall assembly 43 is rotatably set inside the fixed body 41, and the rotation center of the locking member 431 is eccentrically set, one end of the elastic member 432 is connected to the fixed body 41, and the other end of the elastic member 432 is connected to the trigger sleeve 424. The anti-fall mechanism 40 has a compact structure, low manufacturing cost, and small installation space, and can be widely used in lifting equipment with a guide rail 11.

[0069] When the driving device 20 stalls and falls, the rotation speed of the trigger component reaches the preset trigger speed, and the trigger component drives the locking member 431 to rotate to overcome the elastic force of the elastic member 432, so that the locking member 431 abuts against the guide member 10 to achieve locking. During the locking process, the trigger component indirectly drives the locking member 431 to rotate and lock to overcome the elastic force of the elastic member 432, so that the locking member 431 and the contact surface of the guide member 10 form a progressive contact, and the process from the locking member 431 starting to contact the contact surface of the guide member 10 to the complete locking is elongated, thereby achieving the purpose of buffer locking, reducing the impact effect during the locking process, and improving the safety of the driving device 20.

[0070] Continue reading Figure 8 In some embodiments of the present invention, the trigger component includes a centrifugal block 423 and a trigger sleeve 424; the centrifugal block 423 is disposed on the trigger shaft 421 and is suitable for rotating with the trigger shaft 421, the trigger sleeve 424 is rotatably disposed on the trigger shaft 421, the trigger sleeve 424 cover is disposed on the outer side of the centrifugal block 423, and the other end of the elastic member 432 is connected to the trigger sleeve 424.

[0071] When the driving device 20 loses speed and falls, the speed measuring pressure wheel 422 drives the centrifugal block 423 to accelerate through the trigger shaft 421. When the rotation speed of the centrifugal block 423 reaches the preset trigger speed, the centrifugal block 423 opens and abuts against the trigger sleeve 424 to drive the trigger sleeve 424 to rotate. The trigger sleeve 424 drives the locking member 431 to overcome the elastic force of the elastic member 432 to rotate, so that the locking member 431 abuts against the guide component 10 to achieve locking.

[0072] The centrifugal block 423 includes a first block and a second block which are arranged opposite to each other, and a centrifugal spring is connected between the first block and the second block. A through hole is radially provided in the trigger shaft 421, and a centrifugal spring is inserted into the through hole. The two ends of the centrifugal spring respectively fix the first block and the second block, and step surfaces are provided on the contour surfaces of the first block and the second block. When the rotation speed of the trigger shaft 421 is within the safe range, the first block and the second block hold the trigger shaft 421 tightly under the action of the centrifugal spring. Once the rotation speed of the trigger shaft 421 exceeds the safe range, the first block and the second block open under the action of centrifugal force, and the step surfaces of the contour surfaces of the first block and the second block abut against the limiting step, thereby driving the sleeve body 4241 to rotate synchronously.

[0073] Continue reading Figure 8 In some embodiments of the present invention, the trigger sleeve 424 includes a sleeve body 4241 and a trigger lever 4242. The trigger lever 4242 is disposed on the outer circumferential surface of the sleeve body 4241 and is adapted to drive the locking member 431 to rotate. A limiting step is disposed on the inner wall of the sleeve body 4241, and the centrifugal block 423 is opened and adapted to abut against the limiting step to drive the sleeve body 4241 and the trigger lever 4242 to rotate synchronously.

[0074] The trigger lever 4242 may be welded and fixed to the outer circumferential surface of the sleeve body 4241 , or the trigger lever 4242 may be detachably connected to the outer circumferential surface of the sleeve body 4241 by threaded connection.

[0075] The locking member 431 is provided with a trigger slot 4311 , the center line of which is located on a virtual circle with the rotation center of the locking member 431 as the center. The trigger lever 4242 is passed through the trigger slot 4311 to drive the locking member 431 to rotate through the trigger slot 4311 .

[0076] In other words, the trigger groove 4311 is designed to be arc-shaped, allowing the locking member 431 to have a gradual contact process rather than a hard collision, and the impact force of the locking member 431 during the locking process will be gradually absorbed rather than transmitted instantly. In this way, the impact energy is converted into deformation work, which can significantly reduce the peak force and effectively alleviate the braking impact.

[0077] Due to the arc path of the trigger groove 4311, the process from the initial contact to the complete locking of the locking member 431 is elongated, which increases the distance of force action, which is equivalent to extending the locking time. According to the basic formula of physics F×t=m×ΔvF×t=m×Δv, force multiplied by time is equal to mass multiplied by speed change. Under the same mass, extending the action time can reduce the average force borne by the locking member 431, which can improve the safety of locking for lifting equipment.

[0078] In addition, by adjusting the curvature and angle of the trigger slot 4311, it is possible to ensure that the anti-fall mechanism 40 maintains a smooth transition during the locking process, avoiding problems such as bouncing and shaking that may be caused by hard contact, maintaining the dynamic balance of the lifting system, and reducing the possibility of secondary injury to the transported personnel.

[0079] In addition, the path curve of the trigger groove 4311 can be optimized by adjusting parameters such as the arc radius of the trigger groove 4311, so that the anti-fall mechanism 40 can adapt to different falling heights, weights and speed requirements and meet safety requirements under various operating conditions.

[0080] Continue reading Figure 8 In some embodiments of the present invention, a guide groove 412 is provided on the fixed body 41, and the position of the guide groove 412 corresponds to the position of the trigger groove 4311. The arc length of the center line of the guide groove 412 on the virtual circle is greater than the arc length of the center line of the trigger groove 4311 on the virtual circle, and the trigger lever 4242 is sequentially inserted in the guide groove 412 and the trigger groove 4311.

[0081] This is equivalent to providing a guide groove 412 on the fixed body 41 to provide a guide for the trigger lever 4242. The length of the guide groove 412 is greater than the length of the trigger groove 4311, and while providing a guide for the trigger lever 4242, it will not interfere with the movement of the trigger lever 4242 in the trigger groove 4311.

[0082] When the side wall of the fixed body 41 is not a closed structure, for example, when the side wall of the fixed body 41 is a hollow structure, it is equivalent to not providing the guide groove 412 , and the trigger lever 4242 extends into the trigger groove 4311 through the hollow structure.

[0083] See also Fig.11 and Fig.13 In some embodiments of the invention, the locking member 431 includes a cam body, which is rotatably disposed on the trigger shaft 421; a cam surface of the cam body away from the rotation center is provided with a plurality of locking teeth 4312 at intervals, and the locking teeth 4312 are suitable for abutting against the guide component 10.

[0084] Among them, multiple locking teeth 4312 are arranged on the cam body to abut against the guide component 10, which can increase the friction area between the locking member 431 and the guide component 10, improve the friction coefficient between the two, and ensure a stable grip to prevent slipping even when facing a smooth or slippery surface of the guide component 10. At the same time, during high-intensity braking or long-term use, the friction between the contact surface of the locking member 431 and the guide component 10 will generate a large amount of heat energy. Multiple locking teeth 4312 help to disperse this heat, expand the contact interface, avoid concentrated overheating, thereby extending the life of the components and reducing premature wear.

[0085] A friction element may be provided on the surface of the cam body, or the cam body may be made of a friction material and have a relatively large friction element.

[0086] See also Fig.11 and Fig.13 In some embodiments of the invention, a limiter 4313 is provided on the side of the cam body away from the locking tooth 4312. A limiter 413 is provided on the fixed body 41, and the limiter 413 is located on the rotation path of the locking member 431, and the limiter 413 is arranged close to the rotation center of the locking member 431.

[0087] The embodiment of the present invention can restrict the maximum rotation range or stroke of the locking member 431 by physically limiting the locking member 431, so as to avoid exceeding the design boundary under extreme conditions, causing mechanical damage or causing safety accidents. The precise limiting mechanism can enable the locking member 431 to enter the locking position quickly and accurately when needed, improve the response speed and efficiency of the entire lifting system, and ensure reliability at critical moments. In addition, by limiting the range of motion of the locking member 431, unnecessary wear and fatigue accumulation are reduced, the service life of the locking member 431 is extended, and the maintenance cost is reduced.

[0088] See also Figures 7 to 9 When the anti-fall mechanism 40 provided by the embodiment of the present invention is installed, the trigger shaft 421 is inserted into the trigger sleeve 424 and the fixed body 41 in sequence, and the first bearing 44 and the second bearing 45 are arranged at the position where the trigger shaft 421 is connected to the trigger sleeve 424, and the third bearing 46 is arranged at the position where the trigger shaft 421 is connected to the fixed body 41, so as to ensure that the trigger shaft 421 can rotate freely in the trigger sleeve 424 and the fixed body 41. A spacer 47 is arranged between two adjacent bearings, and all moving parts on the trigger shaft 421 can move through the bushing or the spacer 47 and other structural parts to ensure that normal operation is independent of each other without the influence of the force.

[0089] The centrifugal block 423 is sleeved on one end of the trigger shaft 421, and the centrifugal block 423 is located in the accommodation space limited by the trigger sleeve 424, the baffle 4243 and the baffle 4244. The baffle 4243 is limited on one side of the trigger sleeve 424 by a retaining spring or other structure, that is, the baffle 4243 is sleeved on the trigger shaft 421, the baffle 4243 is connected to the trigger sleeve 424, and is limited by a retaining spring or other stopper. The baffle 4244 is fixedly arranged on the other side of the trigger sleeve 424, and the third bearing 46 is installed inside the baffle 4244.

[0090] The trigger lever 4242 is welded or threadedly connected to the sleeve body 4241 , one end of the elastic member 432 is hooked on the limit member 413 , and the other end of the elastic member 432 is hooked on the mounting hole 414 of the sleeve body 4241 .

[0091] The locking member 431 is sleeved on the trigger shaft 421 through a sleeve 48, the sleeve 48 is located between the first bearing 44 and the second bearing 45, and a spacer 47 is provided between the sleeve 48 and the first bearing 44 and the second bearing 45. The limiting member 413 is connected to the threaded hole of the fixed body 41 through a thread, or the limiting member 413 is connected to the threaded hole of the fixed body 41 through a structure such as a latch.

[0092] The speed measuring pressure wheel 422 is connected to the other end of the trigger shaft 421 through a positioning pin, and a spacer sleeve or a limit sleeve is provided on the front side of the speed measuring pressure wheel 422 .

[0093] Continue reading Fig.10 and Fig.11 When the anti-fall mechanism 40 is in normal use, since the operating speed of the driving device 20 does not reach the triggering speed of the centrifugal block 423, the speed measuring pressure wheel 422 operates normally, and the locking member 431 is relatively stably in a triggering state under the action of the elastic member 432 without generating a locking action.

[0094] Continue reading Fig.12 and Fig.13 When the driving device 20 stalls and falls due to other reasons such as the breakage of the traction rope 22 or the slipping of the rope, the gradually increasing speed drives the speed of the speed measuring wheel 422 to gradually increase, and the speed measuring wheel 422 drives the centrifugal block 423 to start accelerating through the trigger shaft 421.

[0095] When the rotation speed of the centrifugal block 423 reaches the preset trigger speed, the centrifugal block 423 opens and contacts the trigger sleeve 424 to drive the trigger sleeve 424 to rotate synchronously. At the same time, the trigger lever 4242 installed on the trigger sleeve 424 starts to rotate synchronously. After the trigger lever 4242 rotates a certain angle, it will drive the locking member 431 to overcome the pulling force of the elastic member 432 and start to rotate. After the locking member 431 rotates to a certain angle, the eccentrically designed locking member 431 and the back wheel 33 work together to make the contact surface of the locking member 431 and the guide rail 11 produce mutual extrusion force, and the locking teeth 4312 on the locking member 431 contact the surface of the guide rail 11. At this time, due to the interaction between the locking teeth 4312 on the locking member 431 and the surface of the guide rail 11, the two are relatively fixed and no longer slide relative to each other, so that the driving device 20 can stop falling under the action of the anti-falling mechanism 40, so that the entire lifting device is locked on the guide rail 11.

[0096] When unlocking is required after replacing the wire rope, etc., it is only necessary to operate the driving device 20 to move upward (electrically or manually). At this time, the speed measuring pressure wheel 422 moves in the opposite direction to that when locked, and the trigger shaft 421 drives the centrifugal block 423 to move in the opposite direction to that when locked, so that the trigger sleeve 424 and the trigger lever 4242 move in opposite directions synchronously to drive the locking member 431 to rotate in the opposite direction of the locking, so that the elastic member 432 drives the locking member 431 to automatically reset to achieve the unlocking operation, and re-prepare for the next possible emergency response, and continuously provide safety protection without human intervention.

[0097] 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 fall prevention mechanism, characterized in that: include: A fixed body, adapted to be mounted to the guide wheel assembly; A trigger assembly, comprising a trigger shaft, a speed measuring pressure wheel and a trigger component, wherein the trigger shaft is rotatably arranged on the fixed body, and the speed measuring pressure wheel and the trigger component are both arranged on the trigger shaft; An anti-falling assembly, comprising a locking member and an elastic member, wherein the locking member is rotatably arranged inside the fixed body, the rotation center of the locking member is eccentrically arranged, one end of the elastic member is connected to the fixed body, and the other end of the elastic member is connected to the trigger component; When the driving device loses speed and falls, the speed measuring wheel drives the trigger component to accelerate through the trigger shaft. When the rotation speed of the trigger component reaches a preset trigger speed, the trigger component drives the locking member to overcome the elastic force of the elastic member and rotate, so that the locking member abuts against the guide member to achieve locking.

2. The anti-fall mechanism according to claim 1, characterized in that: The trigger component includes a centrifugal block and a trigger sleeve; The centrifugal block is arranged on the trigger shaft and is suitable for rotating with the trigger shaft. The trigger sleeve is rotatably arranged on the trigger shaft. The trigger sleeve cover is arranged on the outer side of the centrifugal block. The other end of the elastic member is connected to the trigger sleeve. When the driving device stalls and falls, the speed measuring wheel drives the centrifugal block to accelerate through the trigger shaft. When the rotation speed of the centrifugal block reaches the preset trigger speed, the centrifugal block opens and abuts against the trigger sleeve to drive the trigger sleeve to rotate. The trigger sleeve drives the locking member to overcome the elastic force of the elastic member and rotate, so that the locking member abuts against the guide member to achieve locking.

3. The anti-fall mechanism according to claim 2, characterized in that: The trigger sleeve comprises a sleeve body and a trigger lever, wherein the trigger lever is arranged on the outer circumferential surface of the sleeve body; The locking member is provided with a trigger groove, the center line of which is located on a virtual circle with the rotation center of the locking member as the center, and the trigger lever is passed through the trigger groove to drive the locking member to rotate through the trigger groove.

4. The anti-fall mechanism according to claim 3, characterized in that: The fixed body is provided with a guide groove, the position of the guide groove corresponds to the position of the trigger groove, the arc length of the center line of the guide groove on the virtual circle is greater than the arc length of the center line of the trigger groove on the virtual circle, and the trigger lever is sequentially inserted into the guide groove and the trigger groove.

5. The anti-fall mechanism according to claim 1, characterized in that: The locking member comprises a cam body, and the cam body is rotatably arranged inside the fixed body; A plurality of locking teeth are arranged at intervals on a cam surface of the cam body away from the rotation center, and the locking teeth are suitable for abutting against the guide component.

6. The anti-fall mechanism according to claim 5, characterized in that: A limiting portion is provided on a side of the cam body away from the locking tooth; A limiting piece is disposed on the fixed body, the limiting piece is located on the rotation path of the cam body, and the limiting portion is suitable for abutting against the limiting piece.

7. The anti-falling mechanism according to any one of claims 1 to 6, characterized in that: The interior of the fixed body defines an accommodating cavity, the trigger shaft passes through the fixed body, and is rotatably disposed on the fixed body through a corresponding bearing; The locking member is located in the accommodating cavity and is rotatably matched with the trigger shaft through a shaft sleeve; The speed measuring pressure wheel is located on one side of the fixed body, and the trigger component is located on the other side of the fixed body opposite to the one side.

8. A driving device, characterized in that: It comprises a device body and the anti-falling mechanism according to any one of claims 1 to 7, wherein the device body is provided with a guide wheel group, and the anti-falling mechanism is fixedly arranged on the guide wheel group.

9. The driving device according to claim 8, characterized in that: The guide wheel group includes a mounting bracket, a side guide wheel and a back wheel, wherein the mounting bracket is fixed to the device body, the side guide wheel and the back wheel are both mounted on the mounting bracket, and the axes of the side guide wheel and the back wheel are perpendicular to each other; The anti-falling mechanism is fixed to the mounting bracket, and the speed measuring pressure wheel of the anti-falling mechanism and the back wheel are arranged opposite to each other.

10. A lifting device, characterized in that: It comprises a guide component and the driving device according to claim 8 or 9, wherein the traction rope of the driving device is hung on the guide component, and the guide wheel group is suitable for moving along the extension direction of the guide component.

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