Locking device, hoisting device and hoisting apparatus

Abstract

The application discloses a locking device, a hoisting device and a hoisting equipment. The locking device comprises a telescopic mechanism and a locking mechanism. The telescopic mechanism comprises two moving ends arranged along a first direction and a first driving assembly for driving the two moving ends to move close to or away from each other along the first direction. The locking mechanism comprises a locking piece for limiting the relative movement of the two moving ends and a second driving assembly for driving the locking piece to move so as to lock or unlock the telescopic mechanism. The distance between the two moving ends of the telescopic mechanism is adjustable, and the telescopic mechanism can be used for clamping workpieces with different lengths. The locking mechanism can ensure that the telescopic mechanism is locked when hoisting the workpieces, so that the workpieces are prevented from falling due to unstable clamping, and the safety performance of the lifting appliance can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of hoisting, in particular to a locking device, a hoisting device and a hoisting equipment. BACKGROUND

[0002] The telescopic hoist is generally used for hoisting long strip-shaped objects (such as a steel pipe hoist), and the telescopic hoist can be telescoped to realize clamping and hooking of the material. However, when hoisting heavy objects, the telescopic hoist arm must be ensured not to be telescoped. In order to ensure that the telescopic hoist arm does not appear misoperation or the telescopic mechanism fails to cause the telescopic hoist arm to open during hoisting, a safety protection mechanism needs to be installed to ensure safety. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a locking device, a hoisting device and a hoisting equipment, which can solve the locking problem of the telescopic hoist and improve the safety of the telescopic hoist.

[0004] The present application provides a locking device, which comprises:

[0005] A telescopic mechanism comprising two moving ends arranged along a first direction and a first driving assembly for driving the two moving ends to move close to or away from each other along the first direction;

[0006] A locking mechanism comprising a locking piece for limiting the relative movement of the two moving ends and a second driving assembly for driving the locking piece to move to lock or unlock the telescopic mechanism.

[0007] In some embodiments, the telescopic mechanism comprises:

[0008] A mounting frame;

[0009] Two moving pieces connected to the mounting frame in sliding mode and arranged along the first direction, the sliding direction of the moving pieces being along the first direction, and the ends of the two moving pieces away from each other constituting the moving ends, respectively;

[0010] The second driving assembly is arranged on the mounting frame and is used for driving the locking piece to move along a second direction and abutting against the moving pieces.

[0011] In some embodiments, the locking mechanism further comprises a first linkage assembly for connecting the locking piece and the mounting frame;

[0012] The second driving assembly further comprises:

[0013] A first elastic piece connecting the first linkage assembly and the mounting frame and used for locking the telescopic mechanism by the locking piece;

[0014] A second driving member is configured to drive the locking member away from the moving member to unlock the telescopic mechanism.

[0015] In some embodiments, the first linkage assembly includes two first links, which are arranged along the second direction and are spaced apart from each other, one end of each of the first links is hingedly connected to the mounting frame, and the other end of each of the first links is hingedly connected to the locking member; and the second driving member is drivingly connected to the first links.

[0016] In some embodiments, the second driving assembly further includes:

[0017] A second link is arranged transversely to the first links, one end of the second link is hingedly connected to the mounting frame;

[0018] A third link is hingedly connected to a middle section of the second link at one end and hingedly connected to a middle section of one of the first links at the other end;

[0019] The second driving member is hingedly connected to the other end of the second link to drive the second link to swing.

[0020] In some embodiments, the locking mechanism further includes a rack arranged on the moving member along the first direction; and the locking member is provided with an interfacing tooth configured to interface with the rack.

[0021] In some embodiments, the mounting frame is hollow, the moving member is arranged in the mounting frame, and the first driving assembly includes two transmission wheels rotatably arranged on the mounting frame, a chain connected to the two transmission wheels, and a first driving member configured to drive one of the transmission wheels to rotate; the two transmission wheels are arranged along the first direction, and the chain is connected to the moving member.

[0022] The present application also provides a hoisting device, which includes the above locking device and a clamping jaw mechanism arranged on the two moving ends.

[0023] In some embodiments, the clamping jaw mechanism includes:

[0024] Two fourth links are arranged along the second direction and are spaced apart from each other, one end of each of the fourth links is hingedly connected to the moving end;

[0025] A clamping member is hingedly connected to the other end of each of the fourth links and forms a four-link mechanism with the fourth links;

[0026] A limiting assembly is arranged on the mounting frame and is configured to limit the swing angle of the fourth links;

[0027] A second elastic member is connected to the clamping member and the moving member and is configured to enable the clamping member to be in a position close to the moving end.

[0028] The application further provides a hoisting device, comprising the hoisting device and a beam frame for mounting the hoisting device; the beam frame is provided with two hoisting devices side by side along a third direction, and the hoisting device further comprises an opening and closing mechanism for driving the two hoisting devices to approach or move away from each other.

[0029] The locking device comprises a telescopic mechanism and a locking mechanism, the telescopic mechanism comprises two moving ends arranged along a first direction and a first driving assembly for driving the two moving ends to approach or move away from each other along the first direction; the locking mechanism comprises a locking member for limiting the relative movement of the two moving ends and a second driving assembly for driving the locking member to move to lock or unlock the telescopic mechanism. The distance between the two moving ends of the telescopic mechanism is adjustable, which can be used for clamping workpieces of different lengths, and the locking mechanism can ensure that the telescopic mechanism is locked during hoisting of the workpiece, so that the workpiece is prevented from falling due to unstable clamping, and the safety performance of the lifting device can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 FIG. 1 is a structural schematic view of a hoisting device according to an embodiment of the application;

[0031] Figure 2 FIG. 2 is a structural schematic view of a locking device according to an embodiment of the application; Figure 1

[0032] FIG. 3 is another structural schematic view of the locking device according to the embodiment of the application; Figure 3 Figure 2 FIG. 4 is a sectional view of the hoisting device according to the embodiment of the application;

[0033] Figure 4 Figure 1 FIG. 5 is a side view of the hoisting device according to the embodiment of the application.

[0034] Figure 5 FIG. 6 is a structural schematic view of a hoisting device according to another embodiment of the application. Figure 1

[0035] The purposes, functional features and advantages of the application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0036] The embodiments of the application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the application, but not all the embodiments. Based on the embodiments of the application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the application.

[0037] ​​​It should be noted that all directional indications in the embodiments of this application, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0038] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0039] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0040] This application proposes a locking device, referring to... Figures 1 to 5 The locking device includes: a telescopic mechanism 30, comprising two movable ends arranged along a first direction, and a first drive assembly for driving the two movable ends to move closer or further apart along the first direction; and a locking mechanism 50, comprising a locking member 51 and a second drive assembly. The locking member 51 is used to restrict the relative movement of the two movable ends, and the second drive assembly is used to drive the locking member 51 to move, thereby locking or unlocking the telescopic mechanism 30. In this embodiment, the distance between the two movable ends of the telescopic mechanism 30 is adjustable, making it suitable for workpieces of different lengths. The locking member 51 can be used to lock the telescopic mechanism 30, ensuring that the telescopic mechanism 30 remains locked when lifting the workpiece, preventing the workpiece from falling due to unstable clamping, and improving the safety performance of the lifting device.

[0041] In some embodiments, refer to Figures 1 to 5The telescopic mechanism 30 comprises a mounting frame 31 and two moving pieces 32 which are slidably connected to the mounting frame 31 and arranged along a first direction. The sliding direction of the moving pieces 32 is along the first direction, and the ends of the two moving pieces 32 which are away from each other form moving ends. In the embodiment, the mounting frame 31 can be a square tube, and the moving pieces 32 can also be square tubes. The length direction of the square tube is the first direction. The two moving pieces 32 are inserted into the two ends of the mounting frame 31 respectively, and the moving pieces 32 are slidably connected to the mounting frame 31 through sliding rails and sliding blocks. The sliding rails can be arranged on the inner top wall and the inner bottom wall of the mounting frame 31, and the sliding blocks are arranged on the upper side wall and the lower side wall of the moving pieces 32. The free ends of the two moving pieces 32 which are located outside the mounting frame 31 form the moving ends. The moving pieces 32 can be simultaneously extended out of the mounting frame 31 or inserted into the mounting frame 31, so that the length of the telescopic mechanism 30 as a whole can be adjusted to adapt to workpieces of different lengths.

[0042] A second driving assembly is arranged on the mounting frame 31 and used for driving the locking piece 51 to move along a second direction and abut against the moving piece 32. The locking piece 51 can be arranged close to the end of the mounting frame 31 and directly abut against the moving piece 32, or a through hole through which the locking piece 51 passes can be arranged on the mounting frame 31, and the locking piece 51 abuts against the moving piece 32 through the through hole to achieve locking. The second driving assembly can be a cylinder or a hydraulic cylinder arranged on the upper side of the mounting frame 31 to directly drive the locking piece 51. The push rod of the cylinder is arranged vertically downward, and the locking piece 51 can adopt a friction locking mode. The end of the first locking piece 51 faces the moving piece 32, and when the first locking piece 51 abuts against the moving piece 32, the friction force can limit the moving piece 32 to remain at a set position in the case that the driving force is lost. The locking piece 51 is arranged along a vertical direction, and the second direction is also a vertical direction.

[0043] In addition, some transmission mechanisms can also be additionally arranged for transmission. The locking mechanism 50 further comprises a first linkage assembly for connecting the locking piece 51 and the mounting frame. The second driving assembly further comprises a first elastic piece 56 connected to the first linkage assembly and the mounting frame, and used for locking the locking piece 51 to the telescopic mechanism 30. A second driving piece 55 is used for driving the locking piece 51 to move away from the moving piece to unlock the telescopic mechanism. In the embodiment, the first linkage assembly can be used as a transmission mechanism to transmit the second driving piece 55. The first elastic piece 56 can be a spring.

[0044] Specifically, the second driving assembly comprises two first linkages 52 which are arranged along the second direction at intervals. One end of each first linkage 52 is hingedly connected to the mounting frame 31, and the other end is hingedly connected to the first locking piece 51. The first linkages 52 and the first locking piece 51 form a four-bar linkage mechanism. A second driving piece 55 is arranged on one side of the mounting frame 31 and used for driving the first linkages 52 to swing.

[0045] In the embodiment, the hinge shaft of the first connecting rod 52 is arranged along the third direction. The first connecting rod 52 and the first locking member 51 are arranged as a four-connecting-rod mechanism, which can ensure that the first locking member 51 always remains vertical during the lifting process, avoiding the generation of a force along the first direction on the moving member 32, which interferes with the stretching and clamping process or causes the stretching and clamping process to be stuck. At this time, the second driving member 55 can also be arranged on the front and back sides of the first connecting rod 52 as a cylinder. An extension rod (not shown in the figure) perpendicular to the first connecting rod 52 can be arranged at the middle segment of the first connecting rod 52, and the push rod of the cylinder is connected to the end of the extension rod. The stretching and retracting of the cylinder can drive the first connecting rod 52 to swing up and down.

[0046] Further, the second driving assembly further comprises: a second connecting rod 53, which is arranged in cross with the first connecting rod 52, one end of the second connecting rod 53 being hingedly connected to the mounting frame 31; a third connecting rod 54, one end of which is hingedly connected to the middle segment of the second connecting rod 53, and the other end of which is hingedly connected to the middle segment of one of the first connecting rods 52; and a second driving member 55, which is hingedly connected to the other end of the second connecting rod 53, for driving the second connecting rod 53 to swing. The second driving member 55 can be a cylinder, and the extension of the cylinder can drive the second connecting rod 53 to swing up, and under the transmission of the third connecting rod 54, the first connecting rod 52 can also be driven to swing up, and the first locking member 51 can be simultaneously driven to move upward to play a role of unlocking the stretching and clamping mechanism 30. The retraction of the cylinder can lock the stretching and clamping mechanism 30. The second driving member 55 can be arranged on the side of the mounting frame 31, avoiding other components. Meanwhile, the arrangement of the second connecting rod 53 can also play a role of a lever, achieving the effect of saving labor. Of course, a first elastic member 56 can also be connected to the end of the second connecting rod 53 where the second connecting rod 53 is connected to the cylinder, and the other end of the first elastic member 56 is connected to the mounting frame 31. The tension of the first elastic member 56 can also drive the first locking member 51 to move downward to assist locking. The cylinder needs to overcome the elastic force of the first elastic member 56 when the cylinder is extended to unlock.

[0047] Further, in the above embodiment, the locking mechanism 50 can further comprise a rack 57 arranged on the moving member 32 along the first direction; and the locking member 51 is provided with an abutting tooth for abutting with the rack 57, so as to improve the locking effect.

[0048] The locking mechanism in the embodiment of the application is to ensure that the stretching and clamping arm (stretching and clamping mechanism) is not loosened due to operation errors or stretching and clamping mechanism failures during the lifting of heavy objects, so as to avoid safety accidents. The locking mechanism is implemented as follows. The rack 57 is arranged on the stretching and clamping arm (moving member 32) and moves with the stretching and clamping arm. The locking mechanism and the safety tooth (locking member 51) are arranged on the fixed arm (mounting frame). When the stretching and clamping arm does not need to be stretched and clamped, the safety tooth is inserted into the rack 57 under the action of the first elastic member 56, and the two are in meshing engagement, so as to ensure that the stretching and clamping arm is always in a locked state, thereby ensuring the safety of the lifting device during the lifting of heavy objects.

[0049] When the telescopic arm needs to be telescoped to adjust the length of the telescopic arm, the second driving member 55 overcomes the pressure of the compression spring to push the connecting rod mechanism away, and drive the safety pin gear to separate from the gear rack 57. At this time, the telescopic arm can be telescoped after contacting the safety lock. When the telescopic arm is telescoped to the position and stops, the second driving member 55 is retracted, and the safety pin gear is locked again under the action of the spring force.

[0050] The gear rack 57 has a small modulus, and the safety pin gear is fixed through the connecting rod mechanism, so that the position of the pin gear insertion can be finely adjusted, and the safety pin gear and the gear rack 57 can be locked at any position.

[0051] Of course, a plurality of limiting holes or limiting grooves arranged along the first direction can also be arranged on the moving member 32, and the locking member 51 and the limiting hole are in butt joint to complete the locking. The limiting hole and the limiting groove belong to the equivalent replacement structure of the gear rack.

[0052] In some embodiments, with reference to Figures 1 to 5 The mounting frame 31 is hollow, the moving member 32 is arranged in the mounting frame 31, the first driving assembly includes two transmission wheels 33 arranged on the mounting frame 31, a chain 34 connected between the two transmission wheels 33, and a first driving member 35 driving one of the transmission wheels 33 to rotate. The two transmission wheels 33 are arranged along the first direction, and the chain 34 is connected with the moving member 32. In this embodiment, the transmission wheel 33 and the chain 34 are arranged in the mounting frame 31 and located in the gap between the mounting frame 31 and the moving member 32 on the front and back sides. A set of first driving assemblies can be arranged to drive two moving members 32 to move at the same time. That is, one of the transmission wheels 33 is arranged close to one end of the mounting frame 31, and the other transmission wheel 33 is arranged close to the other end of the mounting frame 31. The two transmission wheels 33 are arranged on the inner wall of the mounting frame 31 and are rotatably connected with the mounting frame 31. The chain 34 is connected between the two transmission wheels 33 and is arranged around the two transmission wheels 33. The chain 34 includes two sections arranged above and below, and the section arranged above is connected with one of the moving members 32, and the section arranged below is connected with the other moving member 32. The first driving member 35 can be arranged on the front side or the rear side of the mounting frame 31 and is used to drive one of the transmission wheels 33 to rotate, so as to drive the two ends of the chain 34 to move up and down, thereby driving the two moving members 32 to move towards or away from each other. Of course, two sets of first driving assemblies can also be used to drive the two moving members 32 to open and close. The transmission wheels 33 of one set are arranged at the ends and the middle of the mounting frame 31, and the transmission wheels 33 of the other set are arranged at the other ends and the middle of the mounting frame 31. Two first driving members 35 are arranged side by side in the middle of the mounting frame 31. One of the first driving members 35 drives one of the transmission wheels 33 in the middle to rotate, and the other first driving member 35 drives the other transmission wheel 33 in the middle to rotate. The use of two sets of first driving assemblies can use first driving members 35 with smaller torsion force, and the load of the first driving member 35 is dispersed.

[0053] The application further provides a hoisting device, referring to Figures 1 to 5 The hoisting device comprises the locking device and the clamping jaw mechanism arranged at the two movable ends. When the telescopic mechanism 30 is extended, the hoisting device is opened. When the clamping jaw mechanisms at the two ends are in correspondence with the two ends of the workpiece, the telescopic mechanism 30 is retracted, so that the clamping jaw mechanisms at the two ends are in butt joint with the two ends of the workpiece, and the clamping is completed.

[0054] Further, the clamping jaw mechanism 40 comprises two fourth connecting rods 41 arranged in the second direction and spaced apart, one end of the fourth connecting rod 41 being hingedly connected with the movable end; a clamping piece 42 hingedly connected with the other end of the two fourth connecting rods 41 and forming a four connecting rod mechanism with the fourth connecting rod 41. A limiting assembly is arranged on the mounting frame 31 and used for limiting the swing angle of the fourth connecting rod 41; a second elastic piece is connected with the clamping piece 42 and the movable piece 32 and used for keeping the clamping piece 42 in the position close to the movable end. In the embodiment, the end of the mounting frame 31 is provided with a mounting seat 311, one of the fourth connecting rods 41 is hingedly connected with the mounting seat 311, and the fourth connecting rod 41 can swing in the mounting seat 311. The limiting assembly comprises an arc-shaped hole arranged in the mounting seat 311 and a protrusion 411 arranged on the fourth connecting rod 41, the protrusion 411 can slide in the arc-shaped hole along with the swing of the fourth connecting rod 41, and the curvature of the arc-shaped hole limits the swing angle of the fourth connecting rod 41. One end of the second elastic piece is connected with the clamping piece 42, and the other end is connected with the mounting seat 311, the pulling force of the second elastic piece keeps the clamping pieces 42 at the two ends of the telescopic mechanism 30 in the state of close to each other, so that the clamping piece 42 can abut against the workpiece, and at the same time, the limiting assembly also provides the clamping piece 42 with a certain swing space, so that mechanical damage is avoided when the pipe is clamped at the end. The lower end of the clamping piece 42 is also provided with a hook-shaped part 43, which can be used for hooking the inner wall of the pipe.

[0055] The application further provides a hoisting device, referring to Figures 1 to 5 The hoisting device comprises the hoisting device and the beam frame 10 used for mounting the hoisting device, the lower part of the beam frame 10 is provided with two hoisting devices in the third direction and side by side, and the hoisting device further comprises an opening and closing mechanism 20 used for driving the two hoisting devices to be close to or away from each other.

[0056] In the embodiment, the mounting frame 31 is suspended at the lower part of the beam frame 10. The opening and closing mechanism 20 can be a screw rod transmission assembly arranged on the beam frame 10, which specifically includes a screw rod 21 arranged along the third direction, and a nut pair 22 arranged at both ends of the screw rod 21. The screw rod 21 includes two sections connected with each other, and the threads of the two sections are opposite in rotation direction. The nut pair 22 is in sliding connection with the beam frame 10, and when the screw rod 21 rotates, the nut pair 22 can move closer to or farther away from each other. The opening and closing mechanism 20 further includes a second motor 23 arranged on the beam frame 10, which is used to drive the screw rod 21 to rotate. The beam frame 10 is provided with a group of opening and closing mechanisms 20 at both ends along the first direction. In one end of the two lifting devices, the mounting frame 31 of one lifting device is connected with one nut pair 22 of one group of opening and closing mechanisms 20, and the mounting frame 31 of the other lifting device is connected with the other nut pair 22 of the opening and closing mechanism 20. In the other end of the two lifting devices, the mounting frame 31 of one lifting device is connected with one nut pair 22 of the other group of opening and closing mechanisms 20, and the mounting frame 31 of the other lifting device is connected with the other nut pair 22 of the other opening and closing mechanism 20. The two groups of opening and closing mechanisms 20 are started at the same time, which can drive the two lifting devices to move closer to or farther away along the third direction. The arrangement of the two lifting devices can simultaneously lift two workpieces. Of course, the two lifting devices can also be brought together to simultaneously lift the same workpiece, especially for workpieces with large tonnage. Of course, the above-mentioned opening and closing mechanism 20 can also be selected to be driven and connected with two electric cylinders and two lifting devices one by one, which can drive the two lifting devices separately to make them separate or come together.

[0057] In the embodiment of the present application, the specific working principle of the lifting device and the lifting equipment is as follows:

[0058] In the locking device and the lifting equipment provided in the present application, the lifting device includes a telescopic mechanism 30 and a locking mechanism 50. The telescopic mechanism 30 includes two moving ends arranged along the first direction. The locking mechanism 50 includes a locking piece 51 and a second driving assembly. The locking piece 51 is used to limit the relative movement of the two moving ends, and the second driving assembly is used to drive the locking piece 51 to move, so as to lock or unlock the telescopic mechanism 30. The distance between the two moving ends of the telescopic mechanism 30 is adjustable, which can be suitable for workpieces of different lengths. The locking mechanism 50 can ensure that the telescopic mechanism 30 is locked during lifting of the workpiece, so as to avoid the workpiece from falling due to unstable clamping, and can improve the safety performance of the lifting device.

[0059] The above is only part or preferred embodiment of the present application, neither the text nor the drawings can limit the scope of protection of the present application, any equivalent structural transformation made by using the content of the present application and the drawings, or direct / indirect application in other related technical fields is included in the scope of protection of the present application.

Claims

1. A locking device, characterized in that The locking device comprises: a telescopic mechanism comprising two moving ends arranged along a first direction and a first driving assembly for driving the two moving ends to move close to or away from each other along the first direction; a locking mechanism comprising a locking member for limiting the relative movement of the two moving ends and a second driving assembly for driving the locking member to move so as to lock or unlock the telescopic mechanism.

2. The locking device of claim 1, wherein, The telescopic mechanism comprises: a mounting frame; two moving members in sliding connection with the mounting frame and arranged along the first direction, the sliding direction of the moving members being along the first direction, and the ends of the two moving members facing away from each other constituting the moving ends; the second driving assembly is arranged on the mounting frame and is used for driving the locking member to move along a second direction and abut against the moving members.

3. The locking device of claim 2, wherein, The locking mechanism further comprises a first linkage assembly for connecting the locking member and the mounting frame; the second driving assembly further comprises: a first elastic member connecting the first linkage assembly and the mounting frame and used for locking the telescopic mechanism by the locking member; a second driving member for driving the locking member to move away from the moving members and unlocking the telescopic mechanism.

4. The locking device of claim 3, wherein The first linkage assembly comprises two first linkages arranged along the second direction, one end of each of the first linkages being hingedly connected to the mounting frame and the other end being hingedly connected to the locking member, and the second driving member is in driving connection with the first linkages.

5. The locking device of claim 4, wherein, The second driving assembly further comprises: a second linkage arranged in cross with the first linkages, one end of the second linkage being hingedly connected to the mounting frame; a third linkage having one end hingedly connected to a middle segment of the second linkage and the other end hingedly connected to a middle segment of one of the first linkages; the second driving member is hingedly connected to the other end of the second linkage and is used for driving the second linkage to swing.

6. Locking device according to any one of claims 2-5, characterized in that The locking mechanism further comprises a rack arranged on the moving members along the first direction, and the locking member is provided with an abutting tooth for abutting against the rack.

7. The locking device of claim 2, wherein, The mounting frame is hollow, the moving members are arranged in the mounting frame, the first driving assembly comprises two transmission wheels rotatably arranged on the mounting frame, a chain connecting the two transmission wheels, and a first driving member for driving one of the transmission wheels to rotate, the two transmission wheels are arranged along the first direction, and the chain is connected with the moving members.

8. A hoisting device, characterized in that The locking device comprises the locking device according to claim 1 and a clamping jaw mechanism arranged on the two moving ends.

9. A hoisting device, characterized in that The locking device comprises the locking device according to any one of claims 2 to 7 and a clamping jaw mechanism arranged on the two moving ends.

10. The hoisting device of claim 9, wherein, The clamping jaw mechanism comprises: two fourth linkages arranged along a second direction, one end of each of the fourth linkages being hingedly connected to the moving ends; a clamping member hingedly connected to the other end of each of the fourth linkages and constituting a four-linkage mechanism with the fourth linkages; a limiting assembly arranged on the mounting frame and used for limiting the swing angle of the fourth linkages; a second elastic member connecting the clamping member and the moving members and used for enabling the clamping member to be in a position close to the moving ends.

11. A hoisting apparatus characterized by, The hoisting device comprises the hoisting device according to claim 8 or 9 or 10, and a beam frame for installing the hoisting device; the lower side of the beam frame is provided with two hoisting devices side by side along the third direction, and the hoisting device further comprises an opening and closing mechanism for driving the two hoisting devices to approach or move away from each other.

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