Internal supporting type lifting appliance

Abstract

The invention relates to the technical field of lifting equipment, and discloses an inner support type lifting appliance which comprises a first transmission assembly, a second transmission assembly and a third transmission assembly, the first transmission assembly at least comprises a first hinge piece and a second hinge piece, and the first end of the first hinge piece and the first end of the second hinge piece are both rotationally connected with a lifting device; the second transmission assembly comprises a first connecting assembly and a second connecting assembly, and the first connecting assembly and the second connecting assembly are connected with the second end of the first hinge piece and the second end of the second hinge piece respectively; the limiting device is provided with a limiting groove, and the first connecting assembly and the second connecting assembly are movably arranged in the limiting groove; the clamping assembly comprises a first clamping piece and a second clamping piece, and the first clamping piece and the second clamping piece are connected with the first connecting assembly and the second connecting assembly respectively. Good connection stability is achieved between the inner supporting type lifting appliance and a heavy object to be lifted.

Description

Technical Field

[0001] The invention relates to the technical field of lifting equipment, in particular to an internally supported lifting device. Background Art

[0002] A sling refers to a device used in lifting machinery to lift heavy objects. In the manufacturing and equipment manufacturing industries, due to the changeable shapes and structures of parts, and the low applicability and versatility of commonly used characteristic slings and contour slings, a large number of special slings need to be manufactured, resulting in high capital investment. Among them, internal support slings are suitable for the lifting, handling and processing of large equipment, machinery and buildings. Due to its light structure, flexibility, stability and other advantages, it is an important tool in the current lifting field. However, most of the current internal support slings directly lift heavy objects through hinged parts during the lifting process, and the stability of the lifting process is poor.

[0003] Therefore, how to provide an internally supported lifting device with excellent lifting stability is a problem that technical personnel in this field need to solve urgently. Summary of the invention

[0004] In view of this, the present invention provides an internally supported sling to solve the problem of poor lifting stability of the existing internally supported sling.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] An internal support type sling, comprising:

[0007] A first transmission assembly, the first transmission assembly at least comprising a first hinge and a second hinge, wherein a first end of the first hinge and a first end of the second hinge are both rotatably connected to a lifting device;

[0008] A second transmission assembly, the second transmission assembly comprising a first connecting assembly and a second connecting assembly, the first connecting assembly and the second connecting assembly being connected to the second end of the first hinge and the second end of the second hinge respectively;

[0009] A limiting device, provided with a limiting groove, wherein the first connecting component and the second connecting component are movably arranged in the limiting groove;

[0010] A clamping assembly, comprising a first clamping member and a second clamping member, wherein the first clamping member and the second clamping member are connected to the first connecting assembly and the second connecting assembly respectively;

[0011] When the second end of the first hinge and the second end of the second hinge move toward each other, the first connecting component and the second connecting component move away from each other, and when the second end of the first hinge and the second end of the second hinge move away from each other, the first connecting component and the second connecting component move toward each other.

[0012] Preferably, the first connecting assembly includes a first connecting rod and a third connecting rod, and the second connecting assembly includes a second connecting rod and a fourth connecting rod;

[0013] Along the length direction of the limiting groove, a first strip-shaped hole is opened in the middle of the first connecting rod, and a second strip-shaped hole is opened in the middle of the second connecting rod;

[0014] One end of the first connecting rod is connected to the third connecting rod, and the other end is connected to the middle part of the second connecting rod through a first connecting member and can move in the second strip hole. One end of the second connecting rod is connected to the fourth connecting rod, and the other end is connected to the middle part of the first connecting rod through a second connecting member and can move in the first strip hole.

[0015] Preferably, the second connecting rod, the third connecting rod and the fourth connecting rod are all provided with mounting grooves, one end of the first connecting rod is located in the mounting groove of the second connecting rod and is connected to the second connecting rod through the first connecting member and the second connecting member, and the other end of the first connecting rod is located in the mounting groove of the third connecting rod and is connected through the third connecting member, and the fourth connecting rod is located in the mounting groove of the second connecting rod and is connected through the fourth connecting member;

[0016] At least one set of sliding blocks are symmetrically provided on both sides of the third connecting rod and the fourth connecting rod through a load-bearing member, and the sliding blocks are slidably connected in the limiting grooves.

[0017] Preferably, the second end of the first hinge and the second end of the second hinge are fixed to the outside of the second transmission assembly through the first connecting member and the second connecting member respectively, the first connecting member is located on the side close to the first hinge, and the second connecting member is located on the side close to the second hinge.

[0018] Preferably, the first transmission assembly further comprises a third hinge and a fourth hinge;

[0019] The first end of the third hinge is rotatably connected to the outer side of the second transmission assembly through the first connecting member, and the first end of the fourth hinge is rotatably connected to the outer side of the second transmission assembly through the second connecting member; the first end of the third hinge and the first end of the fourth hinge are cross-arranged and the intersection is rotatably connected through a fastener;

[0020] The second end of the third hinge is connected to the second end of the second hinge, and the second end of the fourth hinge is connected to the second end of the first hinge.

[0021] Preferably, the limiting device is provided with a first mounting hole on the side facing the first transmission assembly, the fourth hinge passes through the first mounting hole and is fixed to the inner side of the limiting device through the second connecting member, and the third hinge is fixed to the outer side of the limiting device through the first connecting member.

[0022] Preferably, the first clamping assembly and the second clamping assembly each include a clamping member and a sliding member, and the clamping member is slidably connected to the sliding member;

[0023] The sliding member is located on a side of the limiting device away from the first transmission assembly, a second through mounting hole is provided on the side of the limiting device, the sliding member is provided on the outside of the second mounting hole, and the sliding member is connected to the third connecting rod / the fourth connecting rod through the load-bearing member.

[0024] Preferably, the sliding member comprises a connecting portion and a sliding portion;

[0025] The connecting portion is formed with a groove for accommodating the limiting device, and the connecting portion is connected to the third connecting rod / the fourth connecting rod through the load-bearing member; the sliding portion is formed with a sliding groove, and the first clamping assembly / the second clamping assembly is installed in the sliding groove.

[0026] Preferably, the clamping member comprises a clamping portion and a friction block, one end of the clamping portion matches the sliding groove, and the side surface of the other end is detachably connected to the friction block.

[0027] Preferably, the side of the friction block in contact with the heavy object to be lifted has a friction surface.

[0028] Preferably, each of the sliding members is transmission-connected to the third connecting rod / the fourth connecting rod through the two load-bearing members.

[0029] The embodiment of the present invention provides an internal support type sling, which has the following beneficial effects compared with the prior art:

[0030] When using the internal support sling, the first clamping member and the second clamping member are placed in the internal space of the heavy object to be lifted. Since the first end of the first hinge and the first end of the second hinge are both rotatably connected to the lifting device, as the lifting device lifts the first transmission component upward, the first hinge and the second hinge rotate in the clockwise and counterclockwise directions respectively under the action of their own weight, so that the second end of the first hinge and the second end of the second hinge move toward each other, so that the first connection component and the second connection component move away from each other in the limiting groove, driving the first clamping member and the second clamping member to move away from each other. The two members move away from each other until the first clamping member and the second clamping member are pressed against the inner wall of the weight to be lifted, and the first clamping member and the second clamping member fix the weight to be lifted by the friction between the inner wall of the weight to be lifted, so as to achieve lifting. Driven by the lifting device, the present invention sequentially lifts the weight to be lifted through the first transmission assembly, the second transmission assembly and the clamping assembly, and the process is simple. By limiting the second transmission assembly in the limiting device, the moving trajectory of the first hinge and the second hinge, and the travel range of the first hinge and the second hinge are limited, and the lifting process is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0032] Figure 1 The three-dimensional structure of the internal support type hanger of the embodiment of the present invention Figure 1 ;

[0033] Figure 2 The three-dimensional structure of the internal support type hanger of the embodiment of the present invention Figure 2 ;

[0034] Figure 3 The three-dimensional structure of the internal support type hanger of the embodiment of the present invention Figure 3 ;

[0035] Figure 4 is a cross-sectional view of an internally supported hanger according to an embodiment of the present invention;

[0036] Figure 5 This is a three-dimensional structural diagram of an internal support type hanger according to an embodiment of the present invention in which the limiting device is omitted;

[0037] Figure 6 It is a three-dimensional structural diagram of the internal support type hanger of the embodiment of the present invention with the first transmission assembly omitted;

[0038] Figure 7is a three-dimensional structural diagram of the second transmission assembly of an embodiment of the present invention;

[0039] Figure 8 is a three-dimensional structural diagram of a sliding member according to an embodiment of the present invention;

[0040] Fig. 9 is a three-dimensional structural diagram of a clamping portion according to an embodiment of the present invention;

[0041] Fig.10 It is a three-dimensional structural diagram of a friction block according to an embodiment of the present invention.

[0042] In the figure:

[0043] 100-first transmission assembly, 110-first hinge, 120-second hinge, 130-third hinge, 140-fourth hinge, 200-second transmission assembly, 210-first connecting rod, 220-second connecting rod, 230-third connecting rod, 240-fourth pull rod, 300-limiting device, 310-first mounting hole, 320-second mounting hole, 400-clamping assembly, 401-first clamping assembly, 40 2-second clamping assembly, 410-clamping member, 411-clamping part, 412-friction block, 420-sliding member, 421-connecting part, 422-sliding part, 500-lifting ear, 600-load-bearing member, 710-first connecting member, 720-second connecting member, 730-third connecting member, 740-fourth connecting member, 750-first fastener, 760-second fastener, 770-third fastener, 800-slider. DETAILED DESCRIPTION

[0044] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0045] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0046] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0047] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] like Figures 1 to 5 As shown, an embodiment of the present invention provides an internal support type hanger, including a first transmission assembly 100, a second transmission assembly 200, a limiting device 300 and a clamping assembly 400.

[0049] Among them, the first transmission assembly 100 at least includes a first hinge 110 and a second hinge 120, and the first end of the first hinge 110 and the first end of the second hinge 120 are both rotatably connected to the lifting device through a third fastener 770; the second transmission assembly 200 includes a first connecting assembly and a second connecting assembly, and the first connecting assembly and the second connecting assembly are respectively connected to the second end of the first hinge 110 and the second end of the second hinge 120; the limiting device 300 is provided with a limiting groove, and the first connecting assembly and the second connecting assembly are movably arranged in the limiting groove; the clamping assembly 400 includes a first clamping assembly 401 and a second clamping assembly 402, and the first clamping assembly 401 and the second clamping assembly 402 are respectively connected to the first connecting assembly and the second connecting assembly.

[0050] When the second end of the first hinge 110 and the second end of the second hinge 120 move toward each other, the first connecting component and the second connecting component move away from each other. When the second end of the first hinge 110 and the second end of the second hinge 120 move away from each other, the first connecting component and the second connecting component move toward each other.

[0051] It can be understood that when using the internal support sling, the first clamping member 401 and the second clamping member 402 are placed in the internal space of the heavy object to be lifted. Since the first end of the first hinge 110 and the first end of the second hinge 120 are both rotatably connected to the lifting device, as the lifting device lifts the first transmission assembly 100 upward, the first hinge 110 and the second hinge 120 rotate in the clockwise and counterclockwise directions respectively under the action of their own weight, so that the second end of the first hinge 110 and the second end of the second hinge 120 move toward each other, so that the first connecting assembly and the second connecting assembly move away from each other in the limiting groove, driving the first clamping member 401 and the second clamping member 402 to move away from each other. The lifting device is removed until the first clamping member 401 and the second clamping member 402 are in contact with and pressed against the inner wall of the heavy object to be lifted, and the first clamping member 401 and the second clamping member 402 fix the heavy object to be lifted by the friction between the inner wall of the heavy object to be lifted, thereby achieving lifting; on the contrary, when the heavy object needs to be unloaded, the lifting device is removed, and the first hinge 110 and the second hinge 120 are reset because they are no longer affected by the external lifting force. During the reset process, the second end of the first hinge 110 and the second end of the second hinge 120 move away from each other, so that the first connecting component and the second connecting component move towards each other in the limiting groove, driving the first clamping member 401 and the second clamping member 402 to move towards each other until they are separated from the heavy object to be lifted.

[0052] In some embodiments of the present invention, Figure 6 , Figure 7 The first connecting assembly shown includes a first connecting rod 210 and a third connecting rod 230, and the second connecting assembly includes a second connecting rod 220 and a fourth connecting rod 240; along the length direction of the limiting groove, a first strip hole is opened in the middle of the first connecting rod 210, and a second strip hole is opened in the middle of the second connecting rod 220; one end of the first connecting rod 210 is connected to the third connecting rod 230, and the other end is connected to the middle of the second connecting rod 220 through the first connecting member 710 and can move in the second strip hole, and one end of the second connecting rod 220 is connected to the fourth connecting rod 240, and the other end is connected to the middle of the first connecting rod 210 through the second connecting member 720 and can move in the first strip hole.

[0053] It can be understood that in the second transmission assembly 200 formed by the first connecting assembly and the second connecting assembly, a connecting rod mechanism is formed by the fourth connecting rod 240, the second connecting rod 220, the first connecting rod 210 and the third connecting rod 230 connected in sequence, and the first connecting member 710 and the second connecting member 720 can be used to fix the first hinge 110 and the second hinge 120 respectively to realize the transmission connection between the first transmission assembly 100 and the second transmission assembly 200, and then, driven by the lifting device, the first connecting assembly and the second connecting assembly can move toward or away from each other in the limiting device 300 to drive the first clamping assembly 401 and the second clamping assembly 402 to expand until they are clamped on the inner side of the heavy object to be lifted.

[0054] In some embodiments of the present invention, the first connecting assembly and the second connecting assembly have the same structure. The first connecting rod 210 and the second connecting rod 220 have the same shape and are both plate-like structures. The first connecting rod 210 is used as an example for explanation. The two ends of the first connecting rod 210 are respectively provided with fixing holes, and the middle of the two fixing holes is provided with a first strip hole, one of the fixing holes is fixed to the third connecting rod 230 through the third connecting member 730, and the other fixing hole is connected and fixed to the second strip hole of the second connecting rod 220 through the first connecting member 710. The third connecting rod 230 and the fourth connecting rod 240 have the same shape and are both plate-like structures. The third connecting rod 230 is used as an example for explanation. The end of the third connecting rod 230 close to the first connecting rod 210 is provided with a fixing hole, and the connection and fixation of the first connecting rod 210 and the third connecting rod 230 are realized through the third connecting member 730.

[0055] Alternatively, the structures of the first connecting assembly and the second connecting assembly are different. Specifically, the structures of the first connecting rod 210 and the second connecting rod 220 are different, and the structures of the third connecting rod 230 and the fourth connecting rod 240 are the same, wherein the second connecting rod 220, the third connecting rod 230 and the fourth connecting rod 240 are all provided with mounting grooves, one end of the first connecting rod 210 is located in the mounting groove of the second connecting rod 220 and is connected to the second connecting rod 220 through the first connecting member 710 and the second connecting member 720, and the other end is located in the mounting groove of the third connecting rod 230 and is connected through the third connecting member 730, and the fourth connecting rod 240 is located in the mounting groove of the second connecting rod 220 and is connected through the fourth connecting member 740.

[0056] It can be understood that the structures of the first connecting component and the second connecting component in the second transmission component 200 can be the same or different. If each connecting rod is configured as a plate-like structure, the structure is simple. Considering the overall load-bearing capacity and operational stability of the sling, it is preferred that the first connecting component and the second connecting component have different structures. In this structure, the connecting rods are connected in an interlaced manner, which can increase the load-bearing capacity to a certain extent. In addition, since the center lines of the connecting rods are the same, the moving routes of the connecting rods will not be offset, and the moving process is more stable.

[0057] Optionally, at least one group of sliders 800 are symmetrically provided on both sides of the third connecting rod 230 and the fourth connecting rod 240 through the load-bearing parts 600, and the sliders 800 are slidably connected in the limiting grooves; preferably, the first clamping assembly 401 and the second clamping assembly 402 are respectively transmission-connected to the third connecting rod 230 and the fourth connecting rod 240 through two load-bearing parts 600.

[0058] Among them, the load-bearing member 600 can be a load-bearing pin. The present invention adopts the load-bearing member 600 to realize the connection between the clamping assembly 400 and the second transmission assembly 200, which not only ensures the connection stability and safety between the clamping assembly 400 and the second transmission assembly 200, but also through the load-bearing member 600, the overall load-bearing capacity of the sling can be effectively improved.

[0059] It can be understood that one, two or more groups of sliders 800 can be provided on both sides of the third connecting rod 230, and the number of sliders 800 is the same as the number of load-bearing parts 600. The more sliders 800 there are, the more stable and smooth the sliding process is. Specifically, since the load-bearing parts 600 are also used to connect the clamping assembly 400, it is preferred that the number of sliders 800 is at least two groups to ensure that the clamping assembly 400 on either side can be more stably connected to the second transmission assembly 200 through two load-bearing parts 600.

[0060] In some embodiments of the present invention, the second end of the first hinge 110 and the second end of the second hinge 120 are fixed to the outside of the second transmission assembly 200 through the first connecting member 710 and the second connecting member 720 respectively, the first connecting member 710 is located on the side close to the first hinge 110, and the second connecting member 720 is located on the side close to the second hinge 120.

[0061] It can be understood that when the first transmission component 100 is composed of the first hinge 110 and the second hinge 120, the first hinge 110 and the second hinge 120, under the action of the lifting device, drive the first connecting component and the second connecting component to move toward or away from each other, and then drive the first clamping component 401 and the second clamping component 402 to move toward or away from each other to clamp or detach from the inner side of the heavy object to be lifted.

[0062] In some embodiments of the present invention, the first transmission assembly 100 also includes a third hinge 130 and a fourth hinge 140; the first end of the third hinge 130 is rotatably connected to the outer side of the second transmission assembly 200 through the first connecting member 710, and the first end of the fourth hinge 140 is rotatably connected to the outer side of the second transmission assembly 200 through the second connecting member 720; the first end of the third hinge 130 and the first end of the fourth hinge 140 are cross-arranged and the intersection is rotatably connected through the second fastener 760; the second end of the third hinge 130 is connected to the second end of the second hinge 120 through the first fastener 750, and the second end of the fourth hinge 140 is connected to the second end of the first hinge 110 through another first fastener 750.

[0063] Optionally, the third hinge 130 and the fourth hinge 140 are both provided with a straight section and a curved section, the angle between the straight section and the curved section is an obtuse angle, and preferably, the ratio of the force arms of the straight section and the curved section is 5:1. Taking the third hinge 130 as an example, one end of the straight section of the third hinge 130 is fixed to the second end of the second hinge 120, and the other end extends toward the middle of the limiting device 300 and crosses with the fourth hinge 140, and then extends toward the direction of the first clamping group to form a curved section, and the end of the curved section is fixed to the first connecting member 710; one end of the straight section of the fourth hinge 140 is fixed to the second end of the first hinge 110, and the other end extends toward the middle of the limiting device 300 and crosses with the third hinge 130, and then extends toward the direction of the second clamping group to form a curved section, and the end of the curved section is fixed to the second connecting member 720.

[0064] It can be understood that the first hinge 110, the second hinge 120, the third hinge 130 and the fourth hinge 140 form a scissor structure. When a lifting operation is required, the lifting device lifts the lifting ear 500 to reduce the angle between the first hinge 110 and the second hinge 120, and at the same time drives the angle between the third hinge 130 and the fourth hinge 140 to decrease, and then drives the third link 230 and the fourth link 240 to move to both sides of the limiting device 300 through the first connecting rod 210 and the second connecting rod 220 respectively. At the same time, under the action of the load, the first clamping assembly 401 and the second clamping assembly 402 slide to both sides respectively until the clamping assembly 400 is completely in contact with the inner wall of the heavy object to be lifted. The clamping assembly 400 can be controlled to move within a larger stroke range to be suitable for heavy objects with a larger inner diameter range to be lifted.

[0065] In some embodiments of the present invention, a first mounting hole 310 is provided on the side of the limiting device 300 facing the first transmission assembly 100, the fourth hinge 140 passes through the first mounting hole 310 and is fixed to the inner side of the limiting device 300 through the second connecting member 720, and the third hinge 130 is provided on the outer side of the limiting device 300 through the first connecting member 710.

[0066] It should be noted that the first connecting member 710, the second connecting member 720, the third connecting member 730, the fourth connecting member 740, the first fastener 750, the second fastener 760 and the third fastener 770 in the embodiment of the present invention are preferably pins, which have a simple structure and can achieve stable fixation.

[0067] In some embodiments of the present invention, the first clamping assembly 401 and the second clamping assembly 402 both include a clamping member 410 and a sliding member 420, and the clamping member 410 is slidably connected to the sliding member 420; the sliding member 420 is located on the side of the limiting device 300 away from the first transmission assembly 100, and the side of the limiting device 300 is provided with a through second mounting hole 320, the sliding member 420 is arranged on the outside of the second mounting hole 320, and the sliding member 420 is connected to the third connecting rod 230 / the fourth connecting rod 240 through the load-bearing member 600.

[0068] Alternatively, if Figure 8 As shown, the sliding member 420 includes a connecting portion 421 and a sliding portion 422; the connecting portion 421 is formed with a groove for accommodating the limiting device 300, and the connecting portion 421 is connected to the third connecting rod 230 / the fourth connecting rod 240 through the load-bearing member 600, and a sliding groove is formed on the inner side of the sliding portion 422, and the first clamping component 401 / the second clamping component 402 is installed in the sliding groove, and the sliding connection method makes it more convenient and flexible to use.

[0069] Alternatively, if Fig. 9 , Fig.10 As shown, the clamping member 410 includes a clamping portion 411 and a friction block 412 , one end of the clamping portion 411 matches the sliding groove, and the side surface of the other end is detachably connected to the friction block 412 .

[0070] It can be understood that the friction block 412 is mainly in contact with the heavy object to be lifted. Since the friction block 412 and the clamping part 411 are detachably connected, the friction block 412 can be replaced according to the specific situation of the heavy object to be lifted or the wear of the friction block 412. At the same time, since the clamping part 411 and the sliding groove are slidably connected, the clamping part 411 can also be replaced according to the actual situation. The structure is simple, and the installation and disassembly process is simple and easy to operate.

[0071] Optionally, the side of the friction block 412 that contacts the heavy object to be lifted has a friction surface, through which the friction surface can increase the friction between the clamping assembly 400 and the heavy object to be lifted, thereby improving the stability and safety of the lifting process.

[0072] In summary, the present invention, driven by the lifting device, sequentially lifts the heavy object through the first transmission assembly, the second transmission assembly and the clamping assembly. The process is simple, and by limiting the second transmission assembly within the limiting device, the travel range of the lifting device is limited, and the lifting process is more stable.

[0073] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An internal support type hanger, characterized in that: include: A first transmission assembly, the first transmission assembly at least comprising a first hinge and a second hinge, wherein a first end of the first hinge and a first end of the second hinge are both rotatably connected to a lifting device; A second transmission assembly, the second transmission assembly comprising a first connecting assembly and a second connecting assembly, the first connecting assembly and the second connecting assembly being connected to the second end of the first hinge and the second end of the second hinge respectively; A limiting device, provided with a limiting groove, wherein the first connecting component and the second connecting component are movably arranged in the limiting groove; A clamping assembly, comprising a first clamping member and a second clamping member, wherein the first clamping member and the second clamping member are connected to the first connecting assembly and the second connecting assembly respectively; When the second end of the first hinge and the second end of the second hinge move toward each other, the first connecting component and the second connecting component move away from each other, and when the second end of the first hinge and the second end of the second hinge move away from each other, the first connecting component and the second connecting component move toward each other.

2. The internal support type hanger according to claim 1, characterized in that: The first connecting assembly includes a first connecting rod and a third connecting rod, and the second connecting assembly includes a second connecting rod and a fourth connecting rod; Along the length direction of the limiting groove, a first strip-shaped hole is opened in the middle of the first connecting rod, and a second strip-shaped hole is opened in the middle of the second connecting rod; One end of the first connecting rod is connected to the third connecting rod, and the other end is connected to the middle part of the second connecting rod through a first connecting member and can move in the second strip hole. One end of the second connecting rod is connected to the fourth connecting rod, and the other end is connected to the middle part of the first connecting rod through a second connecting member and can move in the first strip hole.

3. The internal support type hanger according to claim 2, characterized in that: The second connecting rod, the third connecting rod and the fourth connecting rod are all provided with mounting grooves, one end of the first connecting rod is located in the mounting groove of the second connecting rod and is connected to the second connecting rod through the first connecting member and the second connecting member, and the other end of the first connecting rod is located in the mounting groove of the third connecting rod and is connected through the third connecting member, and the fourth connecting rod is located in the mounting groove of the second connecting rod and is connected through the fourth connecting member; At least one set of sliding blocks are symmetrically provided on both sides of the third connecting rod and the fourth connecting rod through a load-bearing member, and the sliding blocks are slidably connected in the limiting grooves.

4. The internal support type hanger according to claim 2 or 3, characterized in that: The second end of the first hinge and the second end of the second hinge are fixed to the outside of the second transmission assembly of the second connector through the first connecting member and the second connecting member respectively. The first connecting member is located on the side close to the first hinge, and the second connecting member is located on the side close to the second hinge.

5. The internal support type hanger according to claim 2 or 3, characterized in that: The first transmission assembly further includes a third hinge and a fourth hinge; The first end of the third hinge is rotatably connected to the outer side of the second transmission assembly through the first connecting member, and the first end of the fourth hinge is rotatably connected to the outer side of the second transmission assembly through the second connecting member; the first end of the third hinge and the first end of the fourth hinge are cross-arranged and the intersection is rotatably connected through a fastener; The second end of the third hinge is connected to the second end of the second hinge, and the second end of the fourth hinge is connected to the second end of the first hinge.

6. The internal support type hanger according to claim 5, characterized in that: The limiting device has a first mounting hole on one side facing the first transmission assembly, the fourth hinge passes through the first mounting hole and is fixed to the inner side of the limiting device through the second connecting member, and the third hinge is fixed to the outer side of the limiting device through the first connecting member.

7. The internal support type hanger according to claim 3, characterized in that: The first clamping assembly and the second clamping assembly both include a clamping member and a sliding member, and the clamping member is slidably connected to the sliding member; The sliding member is located on a side of the limiting device away from the first transmission assembly, a second through mounting hole is provided on the side of the limiting device, the sliding member is provided on the outside of the second mounting hole, and the sliding member is connected to the third connecting rod / the fourth connecting rod through the load-bearing member.

8. The internal support type hanger according to claim 7, characterized in that: The sliding member comprises a connecting portion and a sliding portion; The connecting portion is formed with a groove for accommodating the limiting device, and the connecting portion is connected to the third connecting rod / the fourth connecting rod through the load-bearing member; the sliding portion is formed with a sliding groove, and the first clamping assembly / the second clamping assembly is installed in the sliding groove.

9. The internal support type hanger according to claim 8, characterized in that: The clamping member comprises a clamping portion and a friction block, one end of the clamping portion matches the sliding groove, and the side surface of the other end is detachably connected to the friction block; The side of the friction block in contact with the heavy object to be lifted has a friction surface.

10. The internal support type hanger according to any one of claims 7 to 9, characterized in that: Each of the sliding members is transmission-connected to the third connecting rod / the fourth connecting rod through the two load-bearing members.

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