A hoisting device

Abstract

The present application provides a kind of hoisting device, including boom;Self-locking mechanism, including shell and being arranged in the locking structure of shell, the shell includes oppositely arranged first plate and second plate, the first plate and the second plate are opened with corresponding first through hole, the locking structure with the first plate has first gap, the locking structure with the second plate has second gap;Two fasteners, can be respectively inserted into the first through hole on the first plate and the second plate, and be located in first gap and second gap.In the above, the hoisting device provided by the first through hole of fastener is inserted into the first plate and the second plate, and is arranged in first gap and second gap, so that when locking structure is fixed with equipment, locking structure can be fixed by directly rotating fastener, which eliminates the cumbersome work of finding parts, and increases the efficiency of hoisting.Fastener is arranged in the first through hole, which avoids the problem of fastener falling off during hoisting, and reduces the hoisting cost.

Description

[0001] The present application relates to the technical field of mechanical installation, in particular to a hoisting device.

[0002] In the installation mode of equipment, there is a mode that needs to suspend the equipment in the air for use, which is called hoisting type in the market. In the hoisting type using a hook, when the hook clamps the equipment to be hoisted, a screw is needed to fix the hook inside the casing, so as to prevent the hook from falling off during hoisting and causing the equipment to fall from the sky and produce safety hazards. In the existing mode, the screws are often separate and small individuals, and when fixing the hook, the appropriate screw needs to be selected first and carried with a tool. However, in the use process, the screw often falls off and is difficult to find, thereby affecting the progress of hoisting and increasing the hoisting cost.

[0003] Therefore, it is necessary to provide a hoisting device capable of reducing labor cost and improving installation efficiency to solve the above problems.

[0004] The embodiment of the present application provides a hoisting device, which comprises:

[0005] a hoisting rod;

[0006] a self-locking mechanism comprising a casing and a locking structure arranged in the casing, the casing comprising a first plate and a second plate arranged oppositely, the first plate and the second plate being provided with corresponding first through holes, the locking structure having a first gap with the first plate, and the locking structure having a second gap with the second plate;

[0007] two fasteners respectively extending into the first through holes on the first plate and the second plate and located in the first gap and the second gap.

[0008] In at least one embodiment of the present application, the fastener comprises an abutting portion and a rotating portion arranged on the abutting portion;

[0009] the abutting portion can extend into the first through hole on the first plate or the second plate and be located in the first gap or the second gap;

[0010] the rotating portion is located outside the first plate or the second plate and is used to drive the abutting portion to move towards or away from the locking structure.

[0011] In at least one embodiment of the present application, the fastener further comprises a limiting portion;

[0012] the limiting portion is located in the first gap or the second gap to prevent the fastener from falling off from the first through hole.​​​

[0013] In at least one embodiment of the present application, the limiting portion has a diameter greater than that of the first through hole and less than that of the rotating portion.

[0014] In at least one embodiment of the present application, the cabinet has a first mounting hole formed in a vertical direction, the locking structure has a second mounting hole corresponding to the first mounting hole, and the hanging rod can extend into the first and second mounting holes and be fixed in the locking structure.

[0015] In at least one embodiment of the present application, the locking structure includes a locking block and a lock bolt assembly detachably arranged in the locking block.

[0016] The second mounting hole penetrates the locking block, and the locking block is arranged in the cabinet.

[0017] In at least one embodiment of the present application, the locking block has a first placement groove formed in each of two opposite side walls and communicating with the second mounting hole, and a counterbore formed in each of the two opposite side walls and communicating with the first placement groove.

[0018] The lock bolt assembly is arranged in the first placement groove and the counterbore.

[0019] In at least one embodiment of the present application, the lock bolt assembly includes a lock bolt, a resilient member, and a rotating shaft.

[0020] The lock bolt has a mounting groove formed in a vertical direction, and two opposite side walls of the lock bolt have a connecting hole perpendicular to the mounting groove.

[0021] The rotating shaft is arranged in the connecting hole, and two ends of the rotating shaft are fixed to the locking block.

[0022] The resilient member is sleeved on the rotating shaft in the mounting groove, and two ends of the resilient member abut against the locking block.

[0023] In at least one embodiment of the present application, the lock bolt has a curved surface facing the direction of the axis of the second mounting hole.

[0024] When the hanging rod is inserted into the first and second mounting holes, the curved surface is arranged to fit the hanging rod.

[0025] In at least one embodiment of the present application, the lock bolt further includes a clamping portion arranged on the curved surface.

[0026] The clamping part has a first surface and a second surface, the arc surface, the first surface and the second surface are sequentially arranged, and the included angle between the first surface and the second surface is 60° to 80°.

[0027] When the locking structure is clamped with the boom, the first surface is perpendicular to the central axis of the first mounting hole or the second mounting hole.

[0028] The lifting device provided above can fix the locking structure by directly rotating the fastener when the locking structure is fixed with the equipment, avoids the cumbersome work of finding parts, and increases the efficiency of lifting. The fastener is arranged in the first through hole, which avoids the problem of falling of the fastener during lifting, and reduces the cost of lifting. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of the lifting device in an embodiment of the present application.

[0030] Figure 2 It is a schematic diagram of the three-dimensional structure of the lifting device in an embodiment of the present application. Figure 1 It is a sectional view of the lifting device shown in FIG. 1 along the direction I-I.

[0031] Figure 3 It is a sectional view of the lifting device shown in FIG. 1 along the direction I-I. Figure 1 It is an exploded view of the lifting device shown in FIG. 1.

[0032] Figure 4 It is an exploded view of the lifting device shown in FIG. 1. Figure 3 It is a schematic diagram of the three-dimensional structure of the locking structure shown in FIG. 1.

[0033] Figure 5 It is a schematic diagram of the three-dimensional structure of the locking structure shown in FIG. 1. Figure 4 It is an exploded view of the locking structure shown in FIG. 1.

[0034] MAIN ELEMENT SYMBOL EXPLANATION

[0035] 100, hoisting device; 10, boom; 10a, mounting port; 20, self-locking mechanism; 20a, first end face; 20b, second end face; 20c, mounting hole; 21, casing; 21a, receiving groove; 21c, first mounting hole; 21d, first gap; 21e, second gap; 211, first plate; 212, second plate; 213, third plate; 214, fourth plate; 215, fifth plate; 215a, first fixing hole; 21d, first through hole; 21f, second through hole; 22, locking structure; 22c, second mounting hole; 221, locking block; 221a, first placing groove; 221b, counterbore; 221c, stop groove; 221d, second placing groove; 221e, locking hole; 221f, second fixing hole; 222, locking tongue assembly; 2221, locking tongue; 2221a, mounting groove; 2221b, connecting hole; 2221c, arc surface; 22211, connecting part; 22212, abutting part; 22213, clamping part; A, first face; B, second face; 2222, elastic member; 2223, pivot; 30, first fixing member; 40, fastener; 41, abutting part; 42, rotating part. DETAILED DESCRIPTION

[0036] The embodiments of the present application will be described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments of the present application.

[0037] It should be noted that when one component is considered to be "connected" to another component, it can be directly connected to the other component or there can be a middle component. When one component is considered to be "provided on" another component, it can be directly provided on the other component or there can be a middle component. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "back", and the like used herein are for illustrative purposes only.

[0038] The embodiments of the present application provide a hoisting device, comprising a boom; a self-locking mechanism, comprising a casing and a locking structure provided in the casing, the casing comprising a first plate and a second plate provided oppositely, the first plate and the second plate being provided with corresponding first through holes, the locking structure having a first gap with the first plate, and the locking structure having a second gap with the second plate; and two fasteners, respectively extending into the first through holes on the first plate and the second plate, and located in the first gap and the second gap.

[0039] The lifting device provided above can fix the locking structure by directly rotating the fastener when the locking structure is fixed to the equipment, avoids the complicated work of searching for the fastener, and increases the lifting efficiency. The fastener is arranged in the first through hole, which avoids the problem of falling off of the fastener during lifting, and reduces the lifting cost.

[0040] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0041] Please refer to Figure 1 A lifting device 100 includes a lifting rod 10 and a self-locking mechanism 20. Further, the self-locking mechanism 20 has oppositely arranged first and second end faces 20a and 20b, the first end face 20a is provided with a mounting hole 20c, the lifting rod 10 can be inserted into and fixed in the self-locking mechanism 20, and the second end face 20b can be fixed to the equipment to be lifted or the second end face 20b of another self-locking mechanism 20, so as to connect the crane and the equipment to be lifted.

[0042] It should be noted that when the lifting device 100 is used, one end of the lifting rod 10 is fixed to the crane, the other end is inserted into the mounting hole 20c of the self-locking mechanism 20 and fixed in the self-locking mechanism 20, the second end of the self-locking mechanism 20 is fixed to the equipment to be lifted, or the second end of the self-locking mechanism 20 is fixed to the second end of another self-locking mechanism 20, and the lifting rod 10 of the other lifting device 100 is fixed to the equipment to be lifted, so as to fix the crane and the equipment to be lifted. The lifting device 100 can fix the crane and the equipment to be lifted only by the lifting rod 10 and the self-locking mechanism 20, and the fixing of the lifting rod 10 can be completed only by inserting the lifting rod 10 into the mounting hole 20c of the self-locking mechanism 20, which involves fewer components and is simple to operate. Only one person is needed to complete the above operation, which avoids the complicated operation of fixing the crane and the equipment to be lifted by multiple people, reduces labor costs, and increases work efficiency.

[0043] In an embodiment, the lifting rod 10 is in the form of a cylindrical tube, but it is obviously not limited thereto. For example, in another embodiment, the lifting rod 10 can also be in the form of a rectangular column.

[0044] Please refer to Figure 1 and Figure 2Further, the boom 10 is provided with two symmetrical installation openings 10a on the peripheral wall of one end of the boom 10, so that when the boom 10 is inserted into the installation hole 20c of the self-locking mechanism 20, the self-locking mechanism 20 can be clamped into the installation opening 10a to fix the boom 10 in the self-locking mechanism 20. When the self-locking mechanism 20 is clamped into the installation opening 10a, the self-locking mechanism 20 abuts against the four walls of the installation opening 10a, thereby preventing the self-locking mechanism 20 from shaking with the boom 10 during lifting, thereby improving the stability of lifting.

[0045] Please refer to Figure 2 and Figure 3 The self-locking mechanism 20 comprises a casing 21 and a locking structure 22 arranged in the casing 21. Further, the casing 21 is provided with a receiving groove 21a penetrating through the second end surface 20b, and the locking structure 22 can be put into the receiving groove 21a through the opening of the second end surface 20b, thereby facilitating the installation of the casing 21 and the locking structure 22.

[0046] Further, the casing 21 is provided with a first installation hole 21c in the vertical direction, and the locking structure 22 is provided with a second installation hole 22c corresponding to the first installation hole 21c. The boom 10 can be inserted into the first installation hole 21c and the second installation hole 22c and fixed in the locking structure 22.

[0047] It should be noted that by separating and detachably arranging the casing 21 and the locking structure 22, when the locking structure 22 is damaged, the locking structure 22 can be taken out from the receiving groove 21a through the opening of the second end surface 20b, thereby facilitating replacement and maintenance, avoiding the cumbersome operation of replacing a new self-locking mechanism 20 to use the lifting device 100 when the locking structure 22 is damaged, and reducing the maintenance cost of the lifting device 100. Preferably, the inner wall shape of the locking structure 22 at the second installation hole 22c is the same as the outer wall shape of the boom 10, so that when the boom 10 is inserted into the first installation hole 21c and the second installation hole 22c, the boom 10 can be arranged in close contact with the locking structure 22, thereby reducing the space arrangement and reducing the volume of the locking structure 22, thereby reducing the production cost.

[0048] Further, the casing 21 comprises a first plate 211 and a second plate 212 oppositely arranged, the first plate 211 and the second plate 212 oppositely have a first through hole 21d communicated with the accommodating groove 21a, and the hoisting device 100 further comprises a fastener 40, the fastener 40 can extend into the first through hole 21d and abut against the locking structure 22, so as to lock the locking structure 22 in the casing 21. It should be noted that, along the direction of the central axis of the first through hole 21d, the first plate 211 and the locking structure 22 have a first gap 21e, and the second plate 213 and the locking structure 22 have a second gap g. In an embodiment, the fastener 40 has two ends, respectively extending into the first through hole 21c in the first plate 211 and the second plate 212, and located in the first gap 21e and the second gap g. When the hoisting equipment is needed, the boom 10 extends into the first mounting hole 21c and the second mounting hole 22c, and the locking structure 22 is clamped in the mounting port 10a of the boom 10, the fastener 40 is moved to abut against the locking structure 22, so that the locking structure 22 is in close contact with the boom 10 and cannot fall off, thereby increasing the stability of the connection between the boom 10 and the locking structure 22, and preventing the locking structure 22 from falling off from the boom 10 during hoisting, which can cause the hoisted equipment to fall and cause injury. And the two fasteners 40 cannot be separated from the first plate 211 or the second plate 212, thereby avoiding the problem of needing to take out and put in the parts separately, thereby avoiding the problem of the fastener 40 falling off when taking out the parts, and reducing the hoisting cost caused by constantly adding new fasteners 40.

[0049] Further, the two fasteners 40 are movably connected in the two oppositely arranged first mounting holes 21c, so as to clamp the locking structure 22 in the casing 21 from both sides, thereby further increasing the stability of the locking structure 22 and the casing 21.

[0050] In an embodiment, the fastener 40 is generally a table-shaped structure with threads, the first through hole 21d is a threaded hole, and the fastener 40 is threadedly connected in the first through hole 21d. It can be understood that the type of the fastener 40 and the first through hole 21d is not limited to this, and the fastener 40 can also be other structures that can move in the first mounting hole 21c.

[0051] Further, the fastener 40 comprises a resisting portion 41 and a rotating portion 42 arranged on the resisting portion 41. The resisting portion 41 can extend into the first through hole 21c of the first plate 211 or the second plate 212 and be located in the first gap 21e and the second gap g. Preferably, the resisting portion 41 does not deviate from the first gap 21e and the second gap g to avoid the problem that the fastener 40 falls off during hoisting. The rotating portion 42 is located outside the first plate 211 or the second plate 212 and is used to drive the resisting portion 41 to move towards the locking structure 22 or away from the locking structure 22 to control the depth of the resisting portion 41 extending into the first gap 21e or the second gap g, thereby better clamping the locking structure 22 in the cabinet 21.

[0052] In an embodiment, the resisting portion 41 is a screw structure and the rotating portion 42 is a cylindrical rotating disc structure. It can be understood that the types of the resisting portion 41 and the rotating portion 42 are not limited to this, and any structure or device that can be connected to the first plate 211 or the second plate 212 and can move relative to the first plate 211 or the second plate 212 can be used.

[0053] Further, the fastener 40 further comprises a limiting member (not shown in the figure) located in the first gap 21e or the second gap g to prevent the fastener 40 from falling off from the first through hole.

[0054] In an embodiment, the limiting member is a circular disc structure and the diameter of the limiting member is greater than the diameter of the first through hole 21d, so that when the fastener 40 is about to fall off from the first through hole 21d, the limiting member can abut against the inner wall of the first plate 211 or the second plate 212 to limit the movement of the fastener 40 to prevent the fastener 40 from deviating from the first through hole 21d. Further, the diameter of the limiting member is less than the diameter of the rotating portion 42 to reduce the use of materials when achieving the purpose of limiting, thereby reducing the production cost of the fastener 40.

[0055] The rack further comprises a third plate 213 arranged on the first plate 211 and a fourth plate 214 arranged on the second plate 212, and the locking structure 22 is fixed on the device to be hoisted or the third plate 213 and / or the fourth plate 214 of another locking structure 22 through the third plate 213 and / or the fourth plate 214. Preferably, a plurality of second through holes 21f are arranged on the third plate 213 and the fourth plate 214 respectively, and the third plate 213 and the fourth plate 214 are fixed on the device to be hoisted or the third plate 213 and the fourth plate 214 of another rack through the plurality of second through holes 21f.

[0056] In an embodiment, the screw passes through the plurality of second through holes 21f on the third plate 213 and the fourth plate 214 and is fixed in the second through holes 21f on the equipment to be hoisted or another rack, so as to fix the locking structure 22 to the equipment to be hoisted. Preferably, the plurality of second through holes 21f are uniformly arranged on the third plate 213 and the fourth plate 214, so that the third plate 213 and the fourth plate 213 are uniformly stressed when the hoisting device 100 hoists the equipment, thereby preventing the third plate 213 or the fourth plate 214 from being deformed due to local excessive stress, reducing the frequency of equipment maintenance, and reducing maintenance costs.

[0057] Further, the rack further comprises a fifth plate 215 arranged at the other end of the first plate 211 and the second plate 212, and the first mounting hole 21c is arranged on the fifth plate 215. Preferably, the fifth plate 215 is arranged perpendicular to the first plate 211 and the second plate 212, so that the first plate 211 and the second plate 212 are arranged in parallel after being shaped, thereby facilitating the installation of the locking device and the installation of the fastener 40.

[0058] Please refer to Figure 2 , Figure 3 and Figure 4 , the locking structure 22 comprises a locking block 221 and a lock tongue assembly 222 detachably arranged in the locking block 221. Preferably, the second mounting hole 22c penetrates the locking block 221, and the locking block 221 is arranged in the receiving groove 21a. Further, the fifth plate 215 is provided with a plurality of first fixing holes 215a, and the locking block 221 is provided with a plurality of second fixing holes 221f corresponding to the first fixing holes 215a. The screw extends into the plurality of first fixing holes 215a and the plurality of second fixing holes 221f to fix the fifth plate 215 and the locking block 221. Preferably, the plurality of first fixing holes 215a are uniformly arranged on the fifth plate 215, and the plurality of second fixing holes 221f are uniformly arranged on the locking block 221, so that each part is uniformly stressed when the fifth plate 215 and the locking block 221 are fixed, thereby increasing the stability of the fixing of the fifth plate 215 and the locking block 221.

[0059] The first placing groove 221a is arranged on the two opposite side walls of the locking block 221, and the second mounting hole 22c is communicated with the first placing groove 221a. The lock tongue assembly 222 can be placed in the first placing groove 221a and extend into the second mounting hole 22c to clamp the hoist 10 at the mounting hole 10a position on the hoist 10. The structure is simple, and the first placing groove 221a is arranged on the periphery of the locking block 221, so that the locking block 221 and the lock tongue assembly 222 are convenient to install. Further, the two opposite side walls of the locking block 221 are respectively provided with a counterbore 221b communicated with the first placing groove 221a, and the lock tongue assembly 222 is arranged in the first placing groove 221a and the counterbore 221b, so as to install the lock tongue assembly 222 in the locking block 221.

[0060] In an embodiment, the locking block 221 is substantially in the shape of a rectangular body, but is obviously not limited to this. For example, in another embodiment, the locking block 221 can also be a cylindrical body or other shapes that are matched with the cross-sectional area of the accommodating groove 21a.

[0061] The lock tongue assembly 222 includes a lock tongue 2221, an elastic member 2222 and a rotating shaft 2223. The lock tongue 2221 is provided with a mounting groove 2221a in the vertical direction, and the two opposite side walls of the lock tongue 2221 are provided with a connecting hole 2221b perpendicular to the mounting groove 2221a. The rotating shaft 2223 is arranged in the connecting hole 2221b, and the two ends of the rotating shaft 2223 are respectively fixed on the locking block 221. The elastic member 2222 is sleeved on the rotating shaft 2223 in the mounting groove 2221a, and the two ends of the elastic member 2222 are respectively abutted on the inner walls of the mounting groove 2221a and the locking block 221. When the lock tongue assembly 222 is arranged in the first placing groove 221a, the elastic member 2222 pushes the lock tongue 2221 in the direction of the second mounting hole 22c under the action of its own elasticity, so that the lock tongue 2221 is tightly abutted in the first placing groove 221a.

[0062] It should be noted that, during the installation of the lock tongue assembly 222, the lock tongue 2221 is arranged in the first placing groove 221a, and the rotating shaft 2223 is fixed in the counterbore 221b. In the installation direction of the lock tongue 2221, the width of the lock tongue 2221 is less than or equal to the depth of the first placing groove 221a, so as to avoid the problem that the lock tongue 2221 extends out of the first placing groove 221a and interferes with the cabinet 21 when the lock tongue 2221 is installed in the first placing groove 221a.

[0063] In an embodiment, the rotating shaft 2223 is welded in the counterbore 221b, but is obviously not limited to this. For example, in another embodiment, the rotating shaft 2223 can also be fixed in the counterbore 221b by other ways.

[0064] In an embodiment, the elastic member 2222 includes but is not limited to a torsion spring.

[0065] In an embodiment, the rotating shaft 2223 comprises a rod-like structure, such as a cylinder.

[0066] Further, in order to better fix the lock tongue assembly 222 in the first placement slot 221a and the counterbore 221b, the hoisting device 100 further comprises a first fixing member 30. The lock block 221 is provided with a second placement slot 221d which is in communication with the counterbore 221b, and the lock block 221 is provided with a locking hole 221e at the center position of the second placement slot 221d. One end of the first fixing member 30 extends into the locking hole 221e, and the other end is arranged in the second placement slot 221d to stop and fix the lock tongue assembly 222 in the first placement slot 221a and the counterbore 221b.

[0067] It should be noted that the second placement slot 221d extends to the counterbore 221b in the vertical direction and has an overlapping part with the counterbore 221b. In an embodiment, the first fixing member 30 is a screw, the small end of which extends into the locking hole 221e, and the large end is located in the second placement slot 221d. When the rotating shaft 2223 is arranged in the counterbore 221b, the large end of the first fixing member 30 abuts against the peripheral part of the rotating shaft 2223, thereby clamping the rotating shaft 2223 in the counterbore 221b to achieve the fixation of the rotating shaft 2223. The above structure is simple, and the common screw can be used to fix the lock tongue 2221 and the rotating shaft 2223, thereby saving the cost of parts.

[0068] In an embodiment, the first fixing member 30 is threadedly connected with the locking hole 221e. However, it is obviously not limited thereto. For example, in another embodiment, the fixing member can also be an expansion screw, and the locking hole 221e is a regular hole. The expansion screw extends into the locking hole 221e to fix the first fixing member 30 in the locking hole 221e.

[0069] The lock tongue 2221 comprises a connecting part 22211 and an abutting part 22212 arranged on the connecting part 22211. In the vertical direction, the lock block 221 is further provided with a stop slot 221c below the first placement slot 221a, and the abutting part 22212 abuts against the stop slot 221c. When the lock tongue 2221 is arranged in the first placement slot 221a and the counterbore 221b, the elastic member 2222 gives the lock tongue 2221 a force in the direction of the second mounting hole 22c under the action of its own elasticity. At this time, the abutting part 22212 abuts against the stop slot 221c, thereby preventing the abutting part 22212 from extending into the second mounting hole 22c under the action of the elastic member 2222 to block the second mounting hole 22c, and further facilitating the insertion of the suspender 10 into the second mounting hole 22c.

[0070] In an embodiment, the connecting portion 22211 is a main body portion of the lock tongue 2221, and the connecting portion 22211 is placed in the first placement slot 221a. The abutting portion 22212 is a block structure protruding from the connecting portion 22211 and matching the shape of the stop slot 221c.

[0071] Please refer to Figure 5 Further, the connecting portion 22211 has an arc surface 2221c towards the axial direction of the second mounting hole 22c. Preferably, the arc surface 2221c is a circular arc surface 2221c, and the shape of the arc surface 2221c matches the second mounting hole 22c. When the boom 10 is inserted into the first mounting hole 21c and the second mounting hole 22c, the arc surface 2221c is in contact with the boom, thereby avoiding the problem of interference between the connecting portion 22211 and the boom 10 when the boom 10 is inserted into the second mounting hole 22c.

[0072] It should be noted that the shape of the arc surface 2221c is not limited to this, and other shapes that match the shape of the boom 10 are also possible.

[0073] The lock tongue 2221 further includes a clamping portion 22213. The clamping portion 22213 is arranged on the arc surface 2221c and extends from the arc surface 2221c towards the second mounting hole 22c. When the boom 10 is inserted into the first mounting hole 21c and the second mounting hole 22c, the boom 10 pushes the clamping portion 22213 to rotate around the rotation shaft 2223 to disengage from the second mounting hole 22c, until the second mounting hole 10a and the clamping portion 22213 are located in the same horizontal plane. Under the pushing force of the elastic member 2222, the connecting portion 22211 pushes the clamping portion 22213 into the mounting hole 20c, thereby locking the boom 10 in the locking structure 22.

[0074] Further, the clamping portion 22213 has a first surface A and a second surface B. The arc surface 2221c, the first surface A and the second surface B are sequentially arranged. Preferably, when the clamping portion 22213 is clamped in the mounting hole 10a, the first surface A is perpendicular to the axis of the first mounting hole 21c or the second mounting hole 22c, so that the maximum stress area is obtained on the first surface A, thereby increasing the pressure bearing capacity of the clamping portion 22213, preventing the clamping portion 22213 from shaking due to the sliding of the inner wall of the mounting hole 10a at the installation hole 10a caused by the inclination of the derrick 10 when the equipment is lifted by the crane, thereby increasing the stability of the equipment lifting. When the clamping portion 22213 is clamped in the mounting hole 10a, the end point of the first surface A away from the connecting portion 22211 is located in the same vertical plane as the inner wall of the derrick 10. That is, the first surface A completely covers the inner wall of the derrick 10, and the first surface A does not extend into the inner cavity of the derrick 10, thereby effectively preventing the derrick 10 from being separated from the locking structure 22 in the vertical direction under external force when the clamping portion 22213 is clamped in the mounting hole 10a, and minimizing the use of materials of the clamping portion 22213 and reducing the production cost.

[0075] Further, the included angle between the first surface A and the second surface B is in the range of 60° to 80°. Preferably, the included angle between the first surface A and the second surface B is 70°, so as to ensure the effective volume of the clamping portion 22213 for resisting the derrick 10, thereby preventing the derrick 10 from being separated from the locking structure 22 due to the insufficient volume of the clamping portion 22213 to withstand the impact of the derrick 10 during lifting. Wherein, the effective volume refers to the volume of the clamping portion 22213 opposite to the derrick 10.

[0076] It should be noted that, under the premise of ensuring the effective volume of the clamping portion 22213, the included angle between the first surface A and the second surface B is in the range of 60° to 80°, so as to move the contact point of the clamping portion 22213 and the arc surface 2221c downward along the vertical direction as much as possible, thereby minimizing the volume of the clamping portion 22213 under the premise of preventing the derrick 10 from falling off during lifting, reducing the use of materials and reducing the production cost.

[0077] The specific operation process of an embodiment of the present application is as follows:

[0078] When the device needs to be hoisted, one end of the hoist bar 10 is fixed to the hoist, and the end of the hoist bar 10 with the mounting port 10a is inserted into the first mounting hole 21c and the second mounting hole 22c. With the insertion of the hoist bar 10, the hoist bar 10 contacts the clamping portion 22213 and pushes the clamping portion 22213 to rotate around the rotating shaft 2223 to the outside of the second mounting hole 22c. With the gradual insertion of the hoist bar 10, until the clamping portion 22213 and the mounting port 10a are located in the same horizontal plane, the elastic member 2222 pushes the connecting portion 22211 to rotate to the axis direction of the second mounting hole 22c, the connecting portion 22211 drives the clamping portion 22213 to be clamped in the mounting port 10a, so as to lock the tongue lock with the hoist bar 10. Then twist the two fasteners 40 arranged oppositely, so that the fasteners 40 extend into and abut on the connecting portion 22211, thereby necking the two lock tongues 2221 in the rack, so as to prevent the lock tongue 2221 from being separated from the shell 21.

[0079] The hoisting device 100 provided above can fix the locking structure 22 by directly rotating the fastener 40 when the locking structure 22 is fixed with the device, so as to avoid the cumbersome work of finding parts and increase the hoisting efficiency. The fastener 40 is arranged in the first through hole 21d and arranged in the first gap 21e and the second gap 21g, so as to avoid the problem of falling off of the fastener 40 during hoisting and reduce the hoisting cost.

[0080] The above only describes the embodiments of the present application, and it should be pointed out that those skilled in the art can make improvements without departing from the inventive concept, and these improvements are within the protection scope of the present application.

Claims

1. A hoisting device, characterized in that The utility model relates to a lifting device, including: a lifting rod; a self-locking mechanism including a casing and a locking structure arranged in the casing, the casing including oppositely arranged first and second plates, the first and second plates being provided with corresponding first through holes, the locking structure having a first gap with the first plate and a second gap with the second plate; two fasteners respectively extending into the first through holes of the first and second plates and located in the first and second gaps; the casing being provided with a first mounting hole in a vertical direction, the locking structure being provided with a second mounting hole corresponding to the first mounting hole, and the lifting rod being capable of extending into the first and second mounting holes and being fixed in the locking structure; the locking structure including a locking block and a lock bolt assembly detachably arranged in the locking block; the second mounting hole extending through the locking block, and the locking block being arranged in the casing.

2. The hoisting device of claim 1, wherein the fastener including an abutting portion and a rotating portion arranged on the abutting portion; the abutting portion being capable of extending into the first through hole of the first or second plate and being located in the first or second gap; the rotating portion being located outside the first or second plate and being used to drive the abutting portion to move towards or away from the locking structure.

3. The hoisting device of claim 2, wherein the fastener further including a limiting portion; the limiting portion being located in the first or second gap to prevent the fastener from falling out of the first through hole.

4. The hoisting device of claim 3, wherein the diameter of the limiting portion being greater than the diameter of the first through hole and less than the diameter of the rotating portion.

5. The hoisting device of claim 1, wherein opposite side walls of the locking block being respectively provided with first placement grooves in communication with the second mounting hole, and the opposite side walls of the locking block being respectively provided with counterbores in communication with the first placement grooves; the lock bolt assembly being arranged in the first placement grooves and the counterbores.

6. The hoisting device of claim 1, wherein the lock bolt assembly including a lock bolt, an elastic member, and a rotating shaft; the lock bolt being provided with a mounting groove in a vertical direction, and opposite side walls of the lock bolt being provided with connecting holes perpendicular to the mounting groove; the rotating shaft being arranged in the connecting holes, and two ends of the rotating shaft being respectively fixed on the locking block; the elastic member being sleeved on the rotating shaft in the mounting groove, and two ends of the elastic member being respectively abutted on the locking block.

7. The hoisting device of claim 6, wherein the lock bolt having a curved surface towards an axis of the second mounting hole; when the lifting rod is inserted into the first and second mounting holes, the curved surface is arranged to fit the lifting rod.

8. The hoisting device of claim 7, wherein the lock bolt further including a clamping portion arranged on the curved surface; the clamping portion having a first surface and a second surface, the curved surface, the first surface, and the second surface being sequentially arranged, and an included angle between the first surface and the second surface being 60° to 80°; when the locking structure is clamped with the lifting rod, the first surface is perpendicular to a central axis of the first or second mounting hole.

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