Connecting structure and sling

Abstract

The present invention provides a connection structure and a sling. The connection structure includes an intermediate pin and a buffer unit, which are used to connect a first structural member and a second structural member. The first structural member includes a connection portion, which is provided with a first through hole; the second structural member includes two parallel receiving plates, the connection portion can extend into the gap between the two receiving plates, and the receiving plates are provided with a second through hole; the intermediate pin can be embedded in the first through hole, and the intermediate pin is provided with a third through hole; the two buffer units can be detachably connected to the two receiving plates respectively, and each buffer unit includes a first connecting member and a second connecting member, the first connecting member can be embedded in the second through hole, and the second connecting member can be partially embedded in the third through hole. It can be seen that in the connection structure provided by the present invention, the second connecting members on both sides are connected by the intermediate pin, and the second connecting member breaks when the first structural member is impacted, which can be easily disassembled and replaced.

Description

Technical Field

[0001] The present invention relates to the technical field of slings, and in particular to a connecting structure and a sling provided with the connecting structure. Background Art

[0002] Currently, due to the high volume of transport vehicles and densely stacked containers at container yards such as docks and railways, construction machinery such as reach stackers and forklifts are prone to minor side collisions with other vehicles or obstacles when their telescopic beams are extended. Furthermore, the telescopic beams are susceptible to external impacts. This is especially true when lifting larger containers, where the telescopic beams are extended to their full length. Side impacts on the spreader system can easily damage the telescopic beams and the structures connected to them, necessitating repairs before they can resume operation. This reduces operational efficiency and increases maintenance costs. Summary of the Invention

[0003] In view of this, an object of the present invention is to provide a connection structure and a sling provided with the connection structure.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A connecting structure for connecting a first structural member and a second structural member, wherein the first structural member includes a connecting portion, the connecting portion being provided with a first through hole; the second structural member includes two parallel connecting plates, the connecting portion being able to extend into a gap between the two connecting plates, the connecting plates being provided with a second through hole;

[0006] The connection structure includes:

[0007] An intermediate pin shaft, capable of being inserted into the first through hole, and the intermediate pin shaft is provided with a third through hole;

[0008] Two buffer units are respectively located at the two ends of the middle pin shaft and can be detachably connected to the two receiving plates respectively. Each of the buffer units includes a first connecting member and a second connecting member. The first connecting member can be embedded in the second through hole, and the second connecting member is embedded in the first connecting member and can be partially embedded in the third through hole.

[0009] Optionally, in the above connection structure, the first connection member is provided with a fourth through hole, and an inner wall of the fourth through hole of the first connection member is provided with an internal thread;

[0010] The second connecting member can completely pass through the fourth through hole. The second connecting member is provided with an external thread and can be threadedly connected to the first connecting member.

[0011] Optionally, in the above connection structure, the second connection member includes, in sequence along the axial direction of the third through hole:

[0012] a head portion, wherein a diameter of the head portion is larger than a diameter of the fourth through hole;

[0013] a first portion, the first portion being provided with the external thread and capable of being threadedly connected to the first connecting member;

[0014] The second part has a smooth outer wall capable of being embedded in the third through hole.

[0015] Optionally, in the above connection structure, the inner wall of the third through hole of the intermediate pin shaft is smooth.

[0016] Optionally, in the above connection structure, the axial length of the first connection member along the second through hole is greater than the thickness of the receiving plate;

[0017] And / or, the axial length of the intermediate pin is not less than the thickness of the connecting portion.

[0018] Optionally, in the above connection structure, a positioning plate is further included, which can be installed on a side of the receiving plate away from the middle pin shaft;

[0019] A slot is provided on the outer periphery of the first connecting member, and the slot is used to accommodate the positioning plate.

[0020] Optionally, in the above connection structure, the positioning plate is connected to a side of the receiving plate facing away from the middle pin shaft.

[0021] Optionally, the above connection structure further includes:

[0022] a washer, which can be disposed in the gap between the intermediate pin and the receiving plate;

[0023] A limiting member can be provided on the inner wall of the first through hole and cooperate with the washer to limit the axial displacement of the intermediate pin shaft.

[0024] A sling includes a telescopic rod and a fixed seat, wherein one end of the telescopic rod is connected to the fixed seat using the above-mentioned connection structure. In this case, the telescopic rod is the first structural member and the fixed seat is the second structural member.

[0025] Optionally, the above-mentioned sling further includes a positioning plate, which is fixedly arranged on a side of the receiving plate away from the middle pin shaft.

[0026] Optionally, the above-mentioned spreader further comprises:

[0027] main beam;

[0028] a power component connected to the other end of the telescopic rod, and capable of driving the telescopic rod to move along its axial direction;

[0029] A support member is provided on the main beam and connected to the power component.

[0030] The present invention provides a connection structure in which a buffer unit is connected to an intermediate pin. When a first structural member is subjected to a significant impact, the second connecting member at the contact point between the intermediate pin and the first connecting member is sheared by the impact, thereby disconnecting the buffer unit from the intermediate pin and severing the connection between the first and second structural members. This connection structure can then be quickly and easily disassembled. This connection structure is applicable to all slings and only requires machining the intermediate pin and buffer unit, eliminating the need for drilling or welding on the sling. It offers universal applicability, low cost, and easy maintenance. 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 following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 A schematic diagram of a connection structure provided by an embodiment of the present invention;

[0033] Figure 2 A cross-sectional view of a connection structure provided by an embodiment of the present invention;

[0034] Figure 3 A schematic diagram of the structure of a bolt provided in an embodiment of the present invention;

[0035] Figure 4 A schematic structural diagram of an intermediate pin shaft provided in an embodiment of the present invention;

[0036] Figure 5 A schematic structural diagram of a first connecting member provided in an embodiment of the present invention;

[0037] Figure 6 A schematic structural diagram of a sling provided in an embodiment of the present invention.

[0038] in:

[0039] 1-connecting part, 2-supporting plate, 3-middle pin,

[0040] 4-first connecting member, 41-card slot,

[0041] 5-second connecting piece, 51-head, 52-first part, 53-second part,

[0042] 6-positioning plate, 7-washer,

[0043] 81- telescopic rod, 82- fixed seat, 83- main beam, 84- power component, 85- support member, 86- left telescopic beam,

[0044] 87-Right telescopic beam. DETAILED DESCRIPTION

[0045] The invention discloses a connection structure and a sling provided with the connection structure.

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] In the description of the invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "top," and "bottom" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the invention. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] like Figures 1 to 6 As shown, an embodiment of the present invention provides a connection structure.

[0049] First, the connection structure includes an intermediate pin 3 and two buffer units, which are used to connect the first structural member and the second structural member. Among them, the first structural member includes a connecting portion 1, which is provided with a first through hole; the second structural member includes two parallel connecting plates 2, the connecting portion 1 can extend into the gap between the two connecting plates 2, and the connecting plates 2 are provided with a second through hole; the intermediate pin 3 can be embedded in the first through hole, and the intermediate pin 3 is provided with a third through hole; the two buffer units are respectively located at both ends of the intermediate pin 3, and can be detachably connected to the two connecting plates 2 respectively, so as to facilitate the disassembly and replacement of the buffer unit after it breaks. Each buffer unit includes a first connecting member 4 and a second connecting member 5, the first connecting member 4 can be embedded in the second through hole, and the second connecting member 5 is embedded in the first connecting member 4 and partially embedded in the third through hole. It should be noted that the first connecting member 4 and the second connecting member 5 can be set as a detachable connection or a non-detachable connection. Those skilled in the art can make specific designs according to actual needs.

[0050] As can be seen, the buffer unit in the connection structure provided by the embodiment of the present invention is connected to the intermediate pin 3. When the first structural member is subjected to a large impact force, the second connecting member 5 at the contact position between the intermediate pin 3 and the first connecting member 4 is sheared by the impact, thereby disconnecting the buffer unit from the intermediate pin 3 and breaking the connection between the first structural member and the second structural member. At this time, the connection structure can be easily and quickly disassembled. This connection structure is applicable to all slings. Only the intermediate pin 3 and the buffer unit need to be processed, and there is no need to drill holes or weld on the sling. It has universal applicability, low cost, and is very convenient for maintenance.

[0051] In a specific implementation, the first connecting member 4 is provided with a fourth through hole, the inner wall of which is provided with an internal thread; the second connecting member 5 can completely pass through the fourth through hole, and the second connecting member 5 is provided with an external thread, which can be threadedly connected to the first connecting member 4. The outer pin portion of the bolt connection is provided with a thread, that is, the first connecting member 4 and the second connecting member 5 can be detachably connected, facilitating the subsequent replacement of the second connecting member 5.

[0052] In practice, the second connector 5 comprises, in order, a head portion 51, a first portion 52, and a second portion 53 along the axial direction of the third through-hole. The diameter of the head portion 51 is larger than that of the fourth through-hole. This allows the second connector 5 to be clamped onto the side of the first connector 4 away from the docking plate 2, facilitating installation and removal of the second connector 5 from the first connector 4. The first portion 52 is externally threaded and threadably connected to the first connector 4. The second portion 53 has a smooth outer wall and fits into the third through-hole. This smooth outer wall of the second portion 53 contacts the third through-hole of the intermediate bolt, reducing friction and facilitating removal of the second connector 5 if damaged.

[0053] In a specific implementation, the inner wall of the third through hole of the intermediate pin 3 is smooth. The smooth outer wall of the second portion 53 of the second connector 5 can better reduce friction and facilitate disassembly of the second connector 5 after damage. The second connector 5 docks with the third hole of the intermediate pin 3, making disassembly and replacement of the second connector 5 simple after breakage. Furthermore, this connection structure can utilize existing mounting structures to convert a single optical axis into three sections, namely the intermediate pin 3 and the first connectors 4 on both sides. The fourth through holes of the first connectors 4 on both sides are threaded holes that can be threadedly connected to the external threads of the second connectors 5 on both sides, facilitating installation and disassembly of the second connector 5 after damage.

[0054] In specific implementations, the axial length of the first connector 4 along the second through-hole is greater than the thickness of the receiving plate 2; and / or the axial length of the intermediate pin 3 is no less than the thickness of the connecting portion 1. The axial length of the first connector 4 being greater than the thickness of the receiving plate 2 facilitates installation and fixation of the first connector 4. The axial length of the intermediate pin 3 being no less than the thickness of the connecting portion 1 facilitates installation of the intermediate pin 3 and creates a weak point.

[0055] In a specific implementation, a positioning plate 6 is further included, which is located on the side of the receiving plate 2 away from the middle pin 3; a slot 41 is provided on the outer periphery of the first connecting member 4, which is used to accommodate the positioning plate 6. This is beneficial for positioning the first connecting member 4 and the receiving plate 2.

[0056] In specific implementation, the positioning plate 6 is connected to the side of the receiving plate 2 away from the middle pin 3. It is conducive to the positioning and fixation of the first connecting member 4 and the receiving plate 2. It can be a bolt connection or a welding connection. Those skilled in the art can make a specific design according to actual needs.

[0057] In a specific implementation, the device also includes a washer 7 and a stopper. The washer 7 is disposed in the gap between the intermediate pin 3 and the receiving plate 2. The stopper is disposed on the inner wall of the first through-hole and cooperates with the washer 7 to limit the axial displacement of the intermediate pin 3. This facilitates fixing the position of the connecting portion 1 and the receiving plate 2, preventing the intermediate pin 3 from moving in the gap and affecting the force applied to the connecting structure.

[0058] In a specific implementation, the second connecting member 5 is preferably a bolt, and the diameter of the bolt is adapted to the actual force of the connecting portion 1 where the connecting structure is located. Avoid situations where the bolt diameter is too large to set a weak point, and avoid situations where the bolt diameter is too small to be damaged by a small external force.

[0059] An embodiment of the present invention provides a sling, including a telescopic rod 81 and a fixed seat 82, wherein the telescopic rod 81 is the first structural member mentioned above; the fixed seat 82 is the second structural member mentioned above, and one end of the telescopic rod 81 is connected to the fixed seat 82 using the above-mentioned connection structure.

[0060] As can be seen, the buffer unit in the connection structure of the sling provided by the embodiment of the present invention is connected to the intermediate pin 3. If the buffer unit breaks, it can be quickly and easily disassembled. The second connector 5 is weakly loaded at the point where the intermediate pin 3 and the first connector 4 meet, and shears off upon impact. This connection structure is applicable to all slings. Only the intermediate pin 3 and the buffer unit need to be machined, eliminating the need for drilling or welding. It offers universal applicability, low cost, and convenient maintenance.

[0061] In a specific implementation, the sling also includes a main beam 83, a power component 84, and a support member 85. The power component 84 is connected to the other end of the telescopic rod 81 and can drive the telescopic rod 81 along its axial displacement. The support member 85 is disposed on the main beam 83 and connected to the power component 84. The support member 85 serves to support the entire power component 84 in the middle. It should be noted that the power component 84 can be a cylinder or other structural component capable of driving the axial displacement of the telescopic rod 81. The specific structural form of the power component 84 can be designed by those skilled in the art based on actual needs.

[0062] For specific implementation, see Figure 6 , where the power component 84 is illustrated by taking the oil cylinder as an example, the sling also includes a left telescopic beam 86 and a right telescopic beam 87, wherein the left telescopic beam 86 and the right telescopic beam 87 are respectively sleeved on the two ends of the main beam 83. The bottom end of the cylinder is connected to the main beam 83 through the cylinder seat. The rod head end of the telescopic rod 81 is fixed to the cylinder seat (i.e., the fixed seat 82) through a connecting structure. The cylinder retracts and drives the left telescopic beam 86 and the right telescopic beam 87 to move to both sides. After the cylinder is fully extended. When an external force hits the left telescopic beam 86 or the right telescopic beam 87, the force will be transmitted to the telescopic rod 81 of the cylinder, causing the telescopic rod 81 to bend and deform.

[0063] In specific implementation, the pin connecting the telescopic rod 81 to the cylinder base is constructed in three sections. The pins at both ends (i.e., the first connector 4) are identical and connected to the middle pin 3 via the second connectors 5 on either side. The second through-hole of the first connector 4 is threaded, facilitating threaded connection with the second connector 5. The inner wall of the third through-hole of the middle pin 3 is smooth and has a smooth surface, facilitating disassembly after the second connector 5 breaks under shearing. The second connector 5 is a specially designed bolt with one threaded section and one smooth axis. The interface between the threads and the axis corresponds precisely to the two side faces of the middle pin 3. When impacted by external forces, the weakest point breaks, and the telescopic rod 81 detaches from the right telescopic beam 87. This disconnection releases the impact force and prevents bending from direct head-on impact. The telescopic rod 81 sinks, with the support member 85 supporting the entire cylinder. Without the restriction of the oil cylinder, the left telescopic beam 86 and the right telescopic beam 87 will also retract appropriately under the impact of external force, reducing the impact of the impact, protecting the telescopic rod 81, and preventing the telescopic rod 81 from bending and deformation.

[0064] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0065] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0066] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A connecting structure for connecting a first structural member and a second structural member, wherein the first structural member comprises a connecting portion (1), wherein the connecting portion (1) is provided with a first through hole; and the second structural member comprises two parallel connecting plates (2), wherein the connecting portion (1) is capable of extending into a gap between the two connecting plates (2), wherein the connecting plates (2) are provided with a second through hole. It is characterized by: The connection structure includes: An intermediate pin shaft (3) is capable of being embedded in the first through hole, and the intermediate pin shaft (3) is provided with a third through hole; Two buffer units are respectively located at the two ends of the intermediate pin shaft (3) and can be detachably connected to the two receiving plates (2). Each of the buffer units includes a first connecting member (4) and a second connecting member (5). The first connecting member (4) can be embedded in the second through hole, and the second connecting member (5) is embedded in the first connecting member (4) and partially embedded in the third through hole.

2. The connection structure according to claim 1, characterized in that: The first connecting member (4) is provided with a fourth through hole, and the inner wall of the fourth through hole of the first connecting member (4) is provided with an internal thread; The second connecting member (5) can completely pass through the fourth through hole, and the second connecting member (5) is provided with an external thread and can be threadedly connected to the first connecting member (4).

3. The connection structure according to claim 2, characterized in that: The second connecting member (5) comprises, in sequence along the axial direction of the third through hole: a head portion (51), wherein the diameter of the head portion (51) is larger than the diameter of the fourth through hole; a first portion (52), the first portion (52) being provided with the external thread and capable of being threadedly connected to the first connecting member (4); The second part (53) has a smooth outer wall and can be embedded in the third through hole.

4. The connection structure according to claim 1, characterized in that: The inner wall of the third through hole of the intermediate pin shaft (3) is smooth.

5. The connection structure according to claim 1, characterized in that: The axial length of the first connecting member (4) along the second through hole is greater than the thickness of the receiving plate (2); And / or, the axial length of the intermediate pin (3) is not less than the thickness of the connecting portion (1).

6. The connection structure according to claim 1, characterized in that: It also includes a positioning plate (6) that can be installed on a side of the receiving plate (2) facing away from the middle pin shaft (3); A clamping groove (41) is provided on the outer periphery of the first connecting member (4), and the clamping groove (41) is used to accommodate the positioning plate (6).

7. The connection structure according to claim 1, characterized in that: Also includes: A washer (7) can be arranged in the gap between the intermediate pin (3) and the receiving plate (2); A limiting member can be arranged on the inner wall of the first through hole and cooperates with the washer (7) to limit the axial displacement of the intermediate pin shaft (3).

8. A sling, characterized in that: The invention comprises a telescopic rod (81) and a fixed seat (82), wherein one end of the telescopic rod (81) is connected to the fixed seat (82) by adopting a connection structure according to any one of claims 1 to 7, the telescopic rod (81) is the first structural member, and the fixed seat (82) is the second structural member.

9. The spreader according to claim 8, characterized in that: It also includes a positioning plate (6), which is fixedly arranged on a side of the receiving plate (2) facing away from the middle pin shaft (3).

10. The spreader according to claim 8, characterized in that: Also includes: Main beam (83); a power component (84), the power component (84) being connected to the other end of the telescopic rod (81), and the power component (84) being capable of driving the telescopic rod (81) to move along its axial direction; A support member (85) is provided on the main beam (83) and is connected to the power component (84).

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