An overlapping hydraulic clamp

Abstract

The present invention discloses an overlapping hydraulic clamp, wherein a first clamping arm and a second clamping arm are arranged opposite to each other, a first connecting arm and a second connecting arm are cross-distributed and hinged at the intersection position through a first rotating shaft, a first articulated arm is hinged at the end of the first connecting arm, a second articulated arm is hinged at the end of the second connecting arm, a first driving cylinder is arranged vertically, an end of the first articulated arm away from the first connecting arm and an end of the second articulated arm away from the second connecting arm are both hinged to the output end of the first driving cylinder, and the second driving cylinder is hinged between the first rotating shaft and the output end of the first driving cylinder. The hydraulic assembly is used to supply energy to the first driving cylinder and the second driving cylinder. The overlapping hydraulic clamp of this technical solution can greatly improve the clamping force of the clamp, meet the transfer requirements of large components, and improve the stability and safety of clamping.

Description

Technical Field

[0001] The invention is used in the field of lifting clamps, and particularly relates to an overlapping hydraulic clamp. Background Art

[0002] In the prior art, large concrete block components are usually transferred by clamping with clamps or by lifting with ropes during the movement and transportation process. The rope lifting method usually requires setting lifting points on the earth blocks, which not only increases the lifting cost but also has many limitations in the lifting technology.

[0003] The clamp hoisting generally adopts hydraulic clamps for clamping, which not only has limited clamping force, but also has lifting restrictions when lifting large prefabricated parts. In addition, its clamping stability is not high, and the blocks are prone to slip, posing a safety hazard. Summary of the invention

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide an overlapping hydraulic clamp which can greatly improve the clamping force of the clamp, meet the transfer requirements of large components, and improve the stability and safety of the clamping.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] An overlapping hydraulic clamp, comprising:

[0007] A clamp assembly, comprising a first clamp arm, a second clamp arm, a first drive cylinder and a second drive cylinder, wherein the first clamp arm has a first clamping arm and a first connecting arm arranged at one side of the first clamping arm, the second clamp arm has a second clamping arm and a second connecting arm arranged at one side of the second clamping arm, the first clamp arm and the second clamp arm are arranged opposite to each other, the first connecting arm and the second connecting arm are cross-distributed and hinged at the intersection position through a first rotating shaft, the end of the first connecting arm is hinged with a first articulated arm, the end of the second connecting arm is hinged with a second articulated arm, the first drive cylinder is arranged vertically, one end of the first articulated arm away from the first connecting arm and one end of the second articulated arm away from the second connecting arm are both hinged to the output end of the first drive cylinder, and the second drive cylinder is hinged between the first rotating shaft and the output end of the first drive cylinder;

[0008] A hydraulic assembly is used to supply energy to the first drive cylinder and the second drive cylinder.

[0009] In combination with the above-mentioned implementation manner, in certain implementation manners of the present invention, the hydraulic assembly includes a first accumulator, a second accumulator and a third accumulator, the rodless chamber of the second driving cylinder and the rod chamber of the first driving cylinder are connected through a first pipeline, the first accumulator is connected to the rod chamber of the second driving cylinder, the third accumulator is connected to the first pipeline, the second accumulator is connected to the first pipeline through a second pipeline and a third pipeline, the rodless chamber of the first driving cylinder is connected to the first pipeline through a fourth pipeline at a position between the third accumulator and the first driving cylinder, the first pipeline is provided with a first electromagnetic reversing valve between the third accumulator and the second pipeline, the second pipeline is provided with a second electromagnetic reversing valve, and the third pipeline is provided with a one-way valve.

[0010] In combination with the above implementations, in certain implementations of the present invention, friction components are provided on the inner sides of the first clamping arm and the second clamping arm, and anti-slip grooves are provided on the outer surfaces of the friction components.

[0011] In combination with the above implementations, in certain implementations of the present invention, pressure sensors are provided on the inner sides of the first clamping arm and the second clamping arm at positions corresponding to the friction component.

[0012] In combination with the above implementations, in certain implementations of the present invention, both the first clamping arm and the second clamping arm are hinged to the friction component accordingly.

[0013] In combination with the above-mentioned implementation, in certain implementations of the present invention, a first connecting seat and a second connecting seat are spaced apart on one side of the friction component, and an articulated space is formed between the first connecting seat and the second connecting seat of the friction component. The first clamping arm and the second clamping arm are embedded in the corresponding articulated space of the friction component and are hinged to the first connecting seat and the second connecting seat through a second rotating shaft.

[0014] In combination with the above implementation, in certain implementations of the present invention, one end of the first articulated arm away from the first connecting arm, one end of the second articulated arm away from the second connecting arm, and one end of the second drive cylinder away from the first rotating shaft are all hinged to the output end of the first drive cylinder through a connecting rod.

[0015] In combination with the above implementation, in some implementations of the present invention, the first connecting arm and the second connecting arm both have a first arm segment and a second arm segment, the first arm segment of the first connecting arm is arranged between the first clamping arm and the second arm segment of the first connecting arm, the first arm segment of the second connecting arm is arranged between the second clamping arm and the second arm segment of the second connecting arm, and the second arm segments are both inclined upward so that the first connecting arm and the second connecting arm intersect.

[0016] In combination with the above implementations, in certain implementations of the present invention, the cross-sectional area of ​​the second arm segment gradually decreases from one end close to the first arm segment toward the end thereof.

[0017] In combination with the above implementations, in certain implementations of the present invention, the fourth pipeline is provided with a first valve, and the first pipeline is provided with a second valve between the fourth pipeline and the third accumulator.

[0018] One of the above technical solutions has at least one of the following advantages or beneficial effects: the overlapping hydraulic clamp of the technical solution can achieve fast and stable clamping through the cooperation between the first drive cylinder and the second drive cylinder during lifting, and at the same time greatly improve the clamping force of the overlapping hydraulic clamp, meet the transfer requirements of large block components, and improve the stability of clamping. In addition, the first drive cylinder and the second drive cylinder cooperate to clamp and then exit the clamping in sequence, making the clamping safer and more stable, avoiding safety hazards such as slippage of components such as blocks. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings:

[0020] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0021] Figure 2 yes Figure 1 A schematic structural diagram of a second clamping arm of an embodiment is shown;

[0022] Figure 3 yes Figure 1 A schematic diagram of the connection between the friction component, the first connecting seat and the second connecting seat according to an embodiment is shown;

[0023] Figure 4 It is a schematic structural diagram of a hydraulic assembly according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0025] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention.

[0026] In the present invention, "several" means one or more, "multiple" means more than two, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself. In the description of the present invention, if there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0027] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected or electrically connected or able to communicate with each other; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0028] See also Figure 1 and Figure 2 An embodiment of the present invention provides an overlapping hydraulic clamp, including a clamp assembly and a hydraulic assembly. The clamp assembly includes a first clamp arm 1, a second clamp arm 2, a first drive cylinder 31 and a second drive cylinder 32. The first clamp arm 1 has a first clamp arm 11 and a first connecting arm 12 arranged on one side of the first clamp arm 11. The second clamp arm 2 has a second clamp arm 21 and a second connecting arm 22 arranged on one side of the second clamp arm 21.

[0029] The first clamping arm 11 and the second clamping arm 21 are arranged opposite to each other to clamp the block component. The first connecting arm 12 is arranged on a side of the first clamping arm 11 close to the second clamping arm 21, and the second connecting arm 22 is arranged on a side of the second clamping arm 21 close to the first clamping arm 11. The first connecting arm 12 and the second connecting arm 22 are cross-distributed and hinged at the cross position through the first rotating shaft 41.

[0030] The first connecting arm 12 is hinged with the first articulated arm 13 at its end, and the second articulated arm 23 is hinged with the second articulated arm 23 at its end. The first drive cylinder 31 is arranged vertically, and one end of the first articulated arm 13 away from the first connecting arm 12 and one end of the second articulated arm 23 away from the second connecting arm 22 are both hinged to the output end of the first drive cylinder 31, and the second drive cylinder 32 is hinged between the first rotating shaft 41 and the output end of the first drive cylinder 31. The hydraulic assembly is used to supply energy to the first drive cylinder 31 and the second drive cylinder 32.

[0031] When using the clamp to transfer large concrete blocks and other components, the lifting equipment is connected to the top of the first drive cylinder 31, that is, the fixed end of the first drive cylinder 31. The lifting equipment pulls the first articulated arm 13 and the second articulated arm 23 upward through the piston rod 311 of the first drive cylinder 31, and the gravity of the clamp itself causes the piston rod 311 to be stretched out. When the first articulated arm 13 and the second articulated arm 23 are subjected to upward pulling force, the first clamping arm 1 is driven by the first articulated arm 13, and the second clamping arm 2 is driven by the second articulated arm 23 to rotate and move closer to each other, thereby clamping the heavy component such as the block between the first clamping arm 11 and the second clamping arm 21. During this period, the vertical distance between the first rotating shaft 41 and the piston rod 311 of the first drive cylinder 31 increases, and the piston rod 321 of the second drive cylinder 32 is extended, which plays a role of auxiliary support to ensure the stability of the clamping.

[0032] After the heavy component such as the earth block is transferred to a suitable position and put down, the piston rod 311 of the first driving cylinder 31 is first retracted to return to the original position. At this time, the second driving cylinder 32 still provides auxiliary support to the component, so that the first clamping arm 1 and the second clamping arm 2 remain in their original state. After the piston rod 311 of the first driving cylinder 31 is completely returned to the original position, the piston rod 321 of the second driving cylinder 32 is retracted to return to the original position, and the overlapping hydraulic clamp can release the heavy component such as the block to complete the transfer work.

[0033] The overlapping hydraulic clamp of this technical solution can achieve fast and stable clamping through the cooperation between the first drive cylinder 31 and the second drive cylinder 32 during lifting, and at the same time greatly improve the clamping force of the overlapping hydraulic clamp, meet the transfer requirements of large block components, and improve the stability of clamping. In addition, the first drive cylinder 31 and the second drive cylinder 32 cooperate to clamp and then withdraw from the clamping in sequence, making the clamping safer and more stable, avoiding safety hazards such as slippage of blocks and other components.

[0034] Further, see Figure 4 The hydraulic assembly includes a first accumulator 81, a second accumulator 82 and a third accumulator 83. The rodless chamber 322 of the second drive cylinder 32 and the rod chamber 313 of the first drive cylinder 31 are connected through a first pipeline 841. The first accumulator 81 is connected to the rod chamber 323 of the second drive cylinder 32. The third accumulator 83 is connected to the first pipeline 841. The second accumulator 82 is connected to the first pipeline 841 through the second pipeline 842 and the third pipeline 843. The rodless chamber 312 of the first drive cylinder 31 is connected to the first pipeline 841 between the third accumulator 83 and the first drive cylinder 31 through a fourth pipeline 844. The first pipeline 841 is provided with a first electromagnetic reversing valve 91 between the third accumulator 83 and the second pipeline 842. The second pipeline 842 is provided with a second electromagnetic reversing valve 92. The third pipeline 843 is provided with a one-way valve 93.

[0035] When in use, the hoisting device is connected to the top of the first drive cylinder 31, and the first articulated arm 13 and the second articulated arm 23 are pulled up, and the gravitational potential energy of the overlapping hydraulic clamp itself is converted into hydraulic energy of the rod chamber 313 of the first drive cylinder 31, and the piston rod 311 of the first drive cylinder 31 is pulled downward. The first clamp arm 1 is driven by the first articulated arm 13, and the second clamp arm 2 is driven by the second articulated arm 23 to rotate and move closer to each other, so as to clamp the heavy component such as a block between the first clamp arm 11 and the second clamp arm 21.

[0036] During the process of the piston rod 311 of the first driving cylinder 31 being extended downward, the first electromagnetic reversing valve 91 remains energized and the second electromagnetic reversing valve 92 remains de-energized, and the oil in the rod chamber 313 flows to the third accumulator 83 and the rodless chamber 322 of the second driving cylinder 32 for charging, thereby pushing the piston rod 321 in the second driving cylinder 32 to move toward the rod chamber 323, and the oil in the rod chamber 323 flows to the first accumulator 81 for charging, and the piston rod 321 of the second driving cylinder 32 is extended to provide auxiliary support to ensure the stability of the clamping.

[0037] When a heavy component such as an earth block is transferred to a suitable position and lowered, the heavy component no longer exerts force on the piston rod 311 of the first drive cylinder 31, and the oil in the third accumulator 83 flows back to the rod chamber 313 of the first drive cylinder 31. The oil in the second accumulator 82 also charges the rod chamber 313 of the first drive cylinder 31 through the one-way valve 93, and the piston rod 311 of the first drive cylinder 31 contracts until it returns to its original position.

[0038] At this time, since the first solenoid reversing valve 91 continues to remain energized and the second solenoid reversing valve continues to remain de-energized, the oil in the second accumulator 82 charges the first drive cylinder 31 and also flows into the rodless chamber 322 of the second drive cylinder 32, so that the piston rod 321 of the second drive cylinder 32 remains extended and the clamp continues to clamp the heavy component.

[0039] When the heavy component is confirmed to be released, the first electromagnetic reversing valve 91 remains in the de-energized state, and the second electromagnetic reversing valve remains in the energized state, the oil in the rodless chamber 322 of the second drive cylinder 32 flows back to the second accumulator 82, the first accumulator 81 charges the rod chamber 323 of the second drive cylinder 32, the piston rod 321 of the second drive cylinder 32 shrinks and returns to its original position, and the overlapping hydraulic clamp can release the heavy component to complete the transfer work. After the heavy component is completely released, the first electromagnetic reversing valve 91 and the second electromagnetic reversing valve 92 are both switched to the de-energized state.

[0040] The accumulators and the first and second drive cylinders 31 and 32 are used for hydraulic supply, so that the first and second drive cylinders 31 and 32 can maintain a stable clamping force for a long time. In addition, during the transfer process, the accumulators can slowly absorb or release the oil, thereby effectively avoiding the first and second drive cylinders 31 and 32 from quickly clamping or quickly releasing the heavy component, thereby avoiding impact damage to the clamped object, and greatly improving the stability and reliability of the hydraulic clamp.

[0041] Further, see Figure 4 The fourth pipeline 844 is provided with a first valve 94 to realize the opening and closing of the fourth pipeline 844, so as to realize the oil circulation or locking work of the rodless chamber 312 of the first driving cylinder 31 during the transfer of the heavy component. The first pipeline 841 is provided with a second valve 95 between the fourth pipeline 844 and the third accumulator 83 to realize the opening and closing or reversing of the first pipeline 841, so as to meet the oil circulation or locking requirements during the working process.

[0042] Further, see Figure 1 and Figure 2 The first clamping arm 11 and the second clamping arm 21 are both provided with a friction component 5 on their inner sides, that is, the side of the first clamping arm 11 close to the second clamping arm 21 and the side of the second clamping arm 21 close to the first clamping arm 11 are both provided with a friction component 5, and the outer surface of the friction component 5 is provided with an anti-slip pattern (not shown in the figure). When the first clamping arm 11 and the second clamping arm 21 clamp components such as blocks, the friction component 5 directly fits the components, and the anti-slip pattern can increase the friction between the components and the friction component 5, play an anti-slip role, avoid the phenomenon of sliding of components such as blocks during the clamping process, and improve the safety and stability of the lifting process.

[0043] Furthermore, the first clamping arm 11 and the second clamping arm 21 are both hinged to the friction component 5, so that components such as blocks can fit better with the first clamping arm 11 and the second clamping arm 21 during the clamping process, which is beneficial to the fitting clamping of the friction component 5 and the components, and the clamping process is more stable and reliable.

[0044] Further, see Figures 1 to 3 A first connecting seat 61 and a second connecting seat 62 are arranged at intervals on one side of the friction component 5, and an articulated space 63 is formed between the first connecting seat 61 and the second connecting seat 62 of the friction component 5. The first clamping arm 11 and the second clamping arm 21 are embedded in the corresponding articulated space 63 of the friction component 5, and are hinged to the first connecting seat 61 and the second connecting seat 62 through the second rotating shaft 42, so that the installation of the friction component 5 is more secure.

[0045] In some embodiments, pressure sensors (not shown in the figure) are provided on the inner sides of the first clamping arm 11 and the second clamping arm 21 at positions corresponding to the friction component 5 to obtain the clamping conditions of the clamped objects such as blocks, so as to facilitate real-time control of the actions of the first drive cylinder 31 and the second drive cylinder 32 for convenient control.

[0046] See also Figure 1 In some embodiments, one end of the first articulated arm 13 away from the first connecting arm 12, one end of the second articulated arm 23 away from the second connecting arm 22, and one end of the second driving cylinder 32 away from the first rotating shaft 41 are all hinged to the output end of the first driving cylinder 31 through the connecting rod 7, that is, hinged to the piston rod 311 of the first driving cylinder 31, so as to lengthen the distance between the cylinder body of the first driving cylinder 31 and the hinged position, and avoid the phenomenon that the cylinder body of the overlapping hydraulic clamp contracts during the clamping process and interferes with the cylinder body of each articulated arm and the cylinder body of the second driving cylinder 32, so as to meet the clamping requirements of heavy components of different sizes and specifications, with stronger applicability, higher safety and stability.

[0047] Further, see Figure 1 and Figure 2 The first connecting arm 12 and the second connecting arm 22 both have a first arm segment 141 and a second arm segment 142. The first arm segment 141 of the first connecting arm 12 is arranged between the first clamping arm 11 and the second arm segment 142 of the first connecting arm 12. The first arm segment 141 of the second connecting arm 22 is arranged between the second clamping arm 21 and the second arm segment 142 of the second connecting arm 22. The second arm segments 142 are both inclined upward so that the first connecting arm 12 and the second connecting arm 22 intersect. By arranging the second arm segments 142 of the first connecting arm 12 and the second connecting arm 22 to be inclined upward, the first articulated arm 13 and the second clamping arm 2 can be effectively prevented from interfering with each other during the clamping process, and the second articulated arm 23 and the first clamping arm 1 can be prevented from interfering with each other. At the same time, the rotation amplitude of the first clamping arm 1 and the second clamping arm 2 can be reduced during clamping, and the clamping response is faster.

[0048] Furthermore, the cross-sectional area of ​​the second arm segment 142 gradually decreases from one end close to the first arm segment 141 toward the end. The second arm segment 142 with this structural arrangement allows the first connecting arm 12 and the second connecting arm 22 to gradually form a narrowing end toward the end, thereby reducing the overall total volume of the first connecting arm 12 and the second connecting arm 22, thereby reducing the input of production materials and reducing production costs while meeting the clamping strength requirements.

[0049] In the description of this specification, the description with reference to the terms "example", "embodiment" or "some embodiments" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0050] Of course, the invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An overlapping hydraulic clamp, characterized in that: include: A clamp assembly, comprising a first clamp arm, a second clamp arm, a first drive cylinder and a second drive cylinder, wherein the first clamp arm has a first clamping arm and a first connecting arm arranged at one side of the first clamping arm, the second clamp arm has a second clamping arm and a second connecting arm arranged at one side of the second clamping arm, the first clamp arm and the second clamp arm are arranged opposite to each other, the first connecting arm and the second connecting arm are cross-distributed and hinged at the intersection position through a first rotating shaft, the end of the first connecting arm is hinged with a first articulated arm, the end of the second connecting arm is hinged with a second articulated arm, the first drive cylinder is arranged vertically, one end of the first articulated arm away from the first connecting arm and one end of the second articulated arm away from the second connecting arm are both hinged to the output end of the first drive cylinder, and the second drive cylinder is hinged between the first rotating shaft and the output end of the first drive cylinder; A hydraulic component is used to supply energy to the first drive cylinder and the second drive cylinder, and the hydraulic component includes a first accumulator, a second accumulator and a third accumulator. The rodless chamber of the second drive cylinder and the rod chamber of the first drive cylinder are connected through a first pipeline, the first accumulator is connected to the rod chamber of the second drive cylinder, the third accumulator is connected to the first pipeline, the second accumulator is connected to the first pipeline through a second pipeline and a third pipeline, the rodless chamber of the first drive cylinder is connected to the first pipeline through a fourth pipeline to a position between the third accumulator and the first drive cylinder, the first pipeline is provided with a first electromagnetic reversing valve between the third accumulator and the second pipeline, the second pipeline is provided with a second electromagnetic reversing valve, and the third pipeline is provided with a one-way valve.

2. The overlapping hydraulic clamp according to claim 1, characterized in that: The inner sides of the first clamping arm and the second clamping arm are both provided with friction components, and the outer surfaces of the friction components are provided with anti-slip grooves.

3. The overlapping hydraulic clamp according to claim 2, characterized in that: Pressure sensors are provided at positions on the inner sides of the first clamping arm and the second clamping arm corresponding to the friction component.

4. The overlapping hydraulic clamp according to claim 2, characterized in that: The first clamping arm and the second clamping arm are both hinged to the friction component accordingly.

5. The overlapping hydraulic clamp according to claim 4, characterized in that: A first connecting seat and a second connecting seat are arranged at intervals on one side of the friction component, and an articulated space is formed between the friction component and the first connecting seat and the second connecting seat. The first clamping arm and the second clamping arm are embedded in the corresponding articulated space of the friction component and are hinged to the first connecting seat and the second connecting seat through a second rotating shaft.

6. The overlapping hydraulic clamp according to claim 1, characterized in that: One end of the first articulated arm away from the first connecting arm, one end of the second articulated arm away from the second connecting arm, and one end of the second driving cylinder away from the first rotating shaft are all hinged to the output end of the first driving cylinder through a connecting rod.

7. The overlapping hydraulic clamp according to claim 1, characterized in that: The first connecting arm and the second connecting arm both have a first arm segment and a second arm segment, the first arm segment of the first connecting arm is arranged between the first clamping arm and the second arm segment of the first connecting arm, the first arm segment of the second connecting arm is arranged between the second clamping arm and the second arm segment of the second connecting arm, and the second arm segments are both inclined upward so that the first connecting arm and the second connecting arm intersect.

8. The overlapping hydraulic clamp according to claim 7, characterized in that: The cross-sectional area of ​​the second arm segment gradually decreases from one end close to the first arm segment toward the end thereof.

9. The overlapping hydraulic clamp according to claim 1, characterized in that: The fourth pipeline is provided with a first valve, and the first pipeline is provided with a second valve between the fourth pipeline and the third accumulator.

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