A hydraulic fixture

Abstract

The present invention discloses a hydraulic fixture. The first clamping arm and the second clamping arm are arranged oppositely. The end of the second connecting arm is higher than the end of the first connecting arm. The end of the second connecting arm is hinged to the first connecting arm through a first driving cylinder. The end of the first connecting arm is hinged to the second clamping arm. The second driving cylinder is arranged vertically above the second clamping arm, and the output end of the second driving cylinder is hinged to the second connecting arm. The hydraulic component is used to supply energy to the first driving cylinder and the second driving cylinder. The hydraulic fixture of this technical solution realizes rapid clamping through the cooperation between the first driving cylinder and the second driving cylinder, greatly improving the clamping force of the fixture, meeting the transfer requirements of large square components, and improving the clamping stability. By the way that the first driving cylinder and the second driving cylinder cooperate to clamp successively and then withdraw from the clamping in turn, the clamping is made safer and more stable, avoiding potential safety hazards such as slippage of components such as squares.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting fixtures, and particularly to a hydraulic fixture. Background Art

[0002] In the prior art, large concrete block components are usually transferred by clamping with fixtures or by hoisting with ropes. When using the rope hoisting method, it is usually necessary to set lifting points on the earth blocks, which not only increases the hoisting cost but also has many limitations in hoisting technology.

[0003] For fixture hoisting, a hydraulic fixture is generally used for clamping. It not only has limited clamping force, has a lifting limit when lifting large precast components, but also has low clamping stability, and the blocks are prone to slipping, posing a safety hazard. Summary of the Invention

[0004] An object of the present invention is to solve at least one of the technical problems existing in the prior art, and provide a hydraulic fixture that can greatly improve the clamping force of the fixture, meet the transfer requirements of large components, and improve the clamping stability and safety.

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

[0006] A hydraulic fixture, comprising: a first clamping arm, a second clamping arm, a first driving cylinder and a second driving cylinder. The first clamping arm has a first clamping portion and a first connecting portion. The first connecting portion is disposed on a side of the first clamping portion close to the second clamping arm. The second clamping arm has a second clamping portion and a second connecting portion. The second connecting portion is disposed on a side of the second clamping portion close to the first clamping arm. The first clamping portion and the second clamping portion are oppositely arranged. The end of the second connecting portion is higher than the end of the first connecting portion. The end of the second connecting portion is hinged to the first connecting portion through the first driving cylinder. The end of the first connecting portion is hinged to the second clamping arm. The second driving cylinder is vertically disposed above the second clamping arm, and an output end of the second driving cylinder is hinged to the second connecting portion.

[0007] A hydraulic assembly for supplying energy to the first driving cylinder and the second driving cylinder.

[0008] Combined with the above implementation manners, in some 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 first drive cylinder and the rod chamber of the second drive cylinder are connected and communicated through a first pipeline. The first accumulator is communicated with the rod chamber of the first 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 second drive cylinder is connected to a position between the third accumulator and the second drive cylinder on the first pipeline through a fourth pipeline. A first electromagnetic directional valve is provided on the first pipeline between the third accumulator and the second pipeline. A second electromagnetic directional valve is provided on the second pipeline. A check valve is provided on the third pipeline.

[0009] Combined with the above implementation manners, in some implementation manners of the present invention, the end of the first connecting arm is hinged between the second clamping arm and the second connecting arm.

[0010] Combined with the above implementation manners, in some implementation manners of the present invention, pressure sensors are provided on the inner sides of both the first clamping arm and the second clamping arm.

[0011] Combined with the above implementation manners, in some implementation manners of the present invention, friction members are provided on the inner sides of both the first clamping arm and the second clamping arm, and anti-slip patterns are provided on the outer surfaces of the friction members.

[0012] Combined with the above implementation manners, in some implementation manners of the present invention, both the first clamping arm and the second clamping arm are correspondingly hinged to the friction members.

[0013] Combined with the above implementation manners, in some implementation manners of the present invention, pressure sensors are provided on the inner sides of both the first clamping arm and the second clamping arm.

[0014] Combined with the above implementation manners, in some implementation manners of the present invention, the included angle formed between the first clamping arm and the first connecting arm is smaller than the included angle formed between the second clamping arm and the second connecting arm.

[0015] Combined with the above implementation manners, in some implementation manners of the present invention, the cross-sectional area of the first connecting arm remains consistent along the length direction, and the cross-sectional area of the second connecting arm gradually becomes smaller from the end close to the second clamping arm towards the end of the second connecting arm.

[0016] Combined with the above implementation manners, in some implementation manners of the present invention, the output end of the second drive cylinder is hinged to the second connecting arm through a connecting rod.

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

[0018] One of the technical solutions in the above technical solutions has at least one of the following advantages or beneficial effects: The hydraulic fixture in this technical solution realizes rapid clamping through the cooperation between the first driving cylinder and the second driving cylinder, and at the same time greatly improves the clamping force of the fixture, meets the transfer requirements of large square members, and improves the clamping stability. In addition, by the way that the first driving cylinder and the second driving cylinder cooperate to clamp successively and then withdraw from the clamping in turn, the clamping is made safer and more stable, avoiding safety hazards such as slippage of members such as square blocks. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the drawings:

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

[0021] Figure 2 is Figure 1 a side view of the shown embodiment;

[0022] Figure 3 is a schematic structural diagram of a hydraulic component of an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] This part will describe the specific embodiments of the present invention in detail. The preferred embodiments of the present invention are shown in the drawings. The role of the drawings is to supplement the description of the text part of the specification, enabling people to 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 protection scope of the present invention.

[0024] 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 solutions of the present invention, rather than indicating or implying that the technical features referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation on the present invention.

[0025] In the present invention, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and "greater than", "less than", "exceeding", etc. are understood not to include the present number; "above", "below", "within", etc. are understood to include the present number. In the description of the present invention, if "first" and "second" are described, they are only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0026] In the present invention, unless otherwise clearly defined, terms such as "arranged", "installed", and "connected" 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 capable of communicating with each other; they can be the communication inside two components or the interaction relationship between two components. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0027] See Figure 1 and Figure 2 , an embodiment of the present invention provides a hydraulic fixture, including a fixture assembly and a hydraulic assembly. Among them, the fixture assembly includes a first clamping arm 1, a second clamping arm 2, a first driving cylinder 3, and a second driving cylinder 4. The first clamping arm 1 has a first clamping arm 11 and a first connecting arm 12, and the first connecting arm 12 is arranged on one side of the first clamping arm 11 close to the second clamping arm 2. The second clamping arm 2 has a second clamping arm 21 and a second connecting arm 22, and the second connecting arm 22 is arranged on one side of the second clamping arm 21 close to the first clamping arm 11.

[0028] The first clamping arm 11 and the second clamping arm 21 are arranged opposite to each other to clamp the square member. The end of the second connecting arm 22 is higher than the end of the first connecting arm 12, that is, the end of the second connecting arm 22 away from the second clamping arm 21 is higher than the end of the first connecting arm 12 away from the first clamping arm 11. The end of the second connecting arm 22 is hinged to the first connecting arm 12 through the first driving cylinder 3. More specifically, the output end of the first driving cylinder 3 is hinged to the second connecting arm 22, and the fixed end of the first driving cylinder 3 is hinged to the first connecting arm 12. The end of the first connecting arm 12 is hinged to the second clamping arm 2 through a horizontally arranged rotating shaft 5.

[0029] The second driving cylinder 4 is arranged vertically above the second clamping arm 2. The output end of the second driving cylinder 4 is hinged to the second connecting arm 22, and the fixed end of the second driving cylinder 4 is used to connect the hoisting equipment. The hydraulic assembly is used to supply energy to the first driving cylinder 3 and the second driving cylinder 4.

[0030] When using this hydraulic fixture to transfer components such as large concrete blocks, a lifting device (not shown in the figure) is connected to the top of the second driving cylinder 4, that is, the fixed end of the second driving cylinder 4. The lifting device pulls the second clamping arm 2 upward through the piston rod 41 of the second driving cylinder 4, and the gravity of the hydraulic fixture itself causes the piston rod 41 to be stretched out. The second clamping arm 2 is subjected to an upward pulling force. Since there is a hinge point between the first clamping arm 1 and the second clamping arm 2, the first clamping arm 1 rotates clockwise around the rotating shaft 5 to clamp the component between the first clamping arm 11 and the second clamping arm 21. The piston rod 31 of the first driving cylinder 3 then extends and applies a moment to the first clamping arm 1, and the second clamping arm 2 assists in clamping the component under the lever action.

[0031] After the components such as the earth block are transferred to the appropriate position and put down, the piston rod 41 of the second driving cylinder 4 first contracts to return to its original position. At this time, the first driving cylinder 3 still assists in clamping the component, so that the first clamping arm 1 and the second clamping arm 2 remain in their original states. After the second driving cylinder 4 completely returns to its original position, the piston rod 31 of the first driving cylinder 3 then contracts to return to its original position, and the fixture can release heavy components such as the block to complete the transfer work.

[0032] The hydraulic fixture of this technical solution realizes rapid clamping through the cooperation between the first driving cylinder 3 and the second driving cylinder 4 during lifting, and at the same time greatly improves the clamping force of the fixture, meets the transfer requirements of large block components, and improves the clamping stability. In addition, by the way that the first driving cylinder 3 and the second driving cylinder 4 cooperate to clamp successively and then withdraw from clamping in turn, the clamping is made safer and more stable, avoiding potential safety hazards such as slipping of components such as blocks.

[0033] See Figure 3 , in some embodiments, the hydraulic assembly includes a first accumulator 81, a second accumulator 82 and a third accumulator 83. The rodless cavity 33 of the first driving cylinder 3 and the rod chamber 42 of the second driving cylinder 4 are connected and communicated through a first pipeline 841. The first accumulator 81 is communicated with the rod chamber 32 of the first driving cylinder 3. The third accumulator 83 is connected to the first pipeline 841. The second accumulator 82 is connected to the first pipeline 841 through a second pipeline 842 and a third pipeline 843. The rodless cavity 43 of the second driving cylinder 4 is connected to the position of the first pipeline 841 between the third accumulator 83 and the second driving cylinder 4 through a fourth pipeline 844. A first electromagnetic directional valve 91 is provided in the first pipeline 841 between the third accumulator 83 and the second pipeline 842. A second electromagnetic directional valve 92 is provided in the second pipeline 842. A check valve 93 is provided in the third pipeline 843.

[0034] During use, the hoisting device is connected to the cylinder block of the second driving cylinder 4, and the second clamping arm 2 is pulled upward. The gravitational potential energy of the hydraulic fixture itself is converted into hydraulic energy for the rodless cavity 42 of the second driving cylinder 4, and the piston rod 43 of the second driving cylinder 4 is pulled out downward. When an upward pulling force is applied to the second clamping arm 2, since there is a hinge point between the first clamping arm 1 and the second clamping arm 2, the first clamping arm 1 rotates clockwise around the rotating shaft 5 to clamp components such as square blocks between the first clamping arm 11 and the second clamping arm 12.

[0035] During the process of the piston rod 43 of the second driving cylinder 4 extending downward, the first electromagnetic reversing valve 91 remains energized and the second solenoid valve reversing valve 92 remains de-energized. The oil in the rodless cavity 42 flows to the third accumulator 83 and the rodless cavity 33 of the first driving cylinder 3 for energy storage, thereby pushing the piston rod 31 in the first driving cylinder 3 to move towards the direction close to the rodless cavity 42. The oil in the rodless cavity 32 flows to the first accumulator 81 for energy storage. The piston rod 31 of the first driving cylinder 3 extends and applies a torque to the second clamping arm 2. The second clamping arm 2 assists in clamping the heavy object under the lever action to improve the stability of the heavy object clamping process.

[0036] When transferring heavy object components such as earthwork blocks to a suitable position and putting them down, the heavy object components no longer exert force on the piston rod 41 of the second driving cylinder 4. The oil in the third accumulator 83 flows back to the rodless cavity 42 of the second driving cylinder 4. The oil in the second accumulator 82 also charges the rodless cavity 42 of the second driving cylinder 4 through the one-way valve 93. The piston rod 41 of the second driving cylinder 4 contracts until it returns to its original position.

[0037] At this time, since the first electromagnetic reversing valve 91 continues to remain energized and the second solenoid valve reversing valve 92 continues to remain de-energized, the oil in the second accumulator 82 flows to the rodless cavity 33 of the first driving cylinder 3 while charging the second driving cylinder 4, so that the piston rod 31 of the first driving cylinder 3 remains in the extended state, and the fixture continues to clamp the heavy object components.

[0038] When it is confirmed to release the heavy object components, the first electromagnetic reversing valve 91 remains de-energized and the second solenoid valve reversing valve 92 remains energized. The oil in the rodless cavity 33 of the first driving cylinder 3 flows back to the second accumulator 82. The first accumulator 81 charges the rodless cavity 32 of the first driving cylinder 3. The piston rod 31 of the first driving cylinder 3 contracts and returns to its original position, and the hydraulic fixture can release the heavy object components to complete the transfer work. After completely releasing the heavy object components, both the first electromagnetic reversing valve 91 and the second solenoid valve reversing valve 92 are switched to the de-energized state.

[0039] Hydraulic supply is carried out by each accumulator and the first driving cylinder 3 and the second driving cylinder 4, so that the first driving cylinder 3 and the second driving cylinder 4 can maintain a stable clamping force for a long time. And during the transfer process, each accumulator can slowly absorb or release oil, thus effectively avoiding the situation that the first driving cylinder 3 and the second driving cylinder 4 quickly clamp or quickly release the heavy object component, and further avoiding impact damage to the clamped object, greatly improving the stability and reliability of the hydraulic fixture.

[0040] Furthermore, referring to Figure 3 , a first valve 94 is provided on the fourth pipeline 844 to realize the on-off of the fourth pipeline 844, so as to realize the oil flow or locking operation of the rodless cavity 31 of the second driving cylinder 4 during the transfer of the heavy object component. A second valve 95 is provided between the fourth pipeline 844 and the third accumulator 83 on the first pipeline 841 to realize the on-off or commutation of the first pipeline 841, meeting the requirements of oil flow or locking during the working process.

[0041] Furthermore, 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 to obtain the clamping condition of the clamped object such as a square block, so as to facilitate the real-time control of the actions of the first driving cylinder 3 and the second driving cylinder 4 and facilitate the control.

[0042] Furthermore, referring to Figure 1 , the end of the first connecting arm 12 is hinged between the second clamping arm 21 and the second connecting arm 22, which is beneficial to more intuitively and quickly obtain the rotation angle of the second clamping arm 21 during the clamping process in the production design and actual use process, meeting the adjustment requirements of the clamping angle.

[0043] Furthermore, referring to Figure 1 , the output end of the second driving cylinder 4 is hinged to the second connecting arm 22 through a connecting rod 6 to increase the distance between the cylinder body part of the second driving cylinder 4 and the second connecting arm 22, avoiding the interference phenomenon between the cylinder body and the second connecting arm 22 due to the contraction of the piston rod 41 of the second driving cylinder 4 during the clamping process, so as to meet the clamping requirements of square block components of different sizes and specifications, with stronger applicability and higher safety and stability.

[0044] Furthermore, referring to Figure 1, on one side of the first clamping arm 11 close to the second clamping arm 21 and on one side of the second clamping arm 21 close to the first clamping arm 11, friction members 7 are provided. That is to say, friction members 7 are provided on the inner sides of the first clamping arm 11 and the second clamping arm 21. Anti-slip patterns are provided on the outer surfaces of the friction members 7. When the first clamping arm 11 and the second clamping arm 21 clamp components such as a square block, they are directly attached to the component through the friction members 7. The anti-slip patterns can increase the friction between the component and the friction members 7, playing an anti-slip role and avoiding the phenomenon of slipping of components such as a square block during the clamping process, and improving the safety and stability of the hoisting process.

[0045] Furthermore, the first clamping arm 11 and the second clamping arm 21 are respectively and hingedly connected to the friction members 7, so that components such as a square block 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 and clamping of the friction members 7 with the component, and the clamping process is more stable and reliable.

[0046] See Figure 1 , in some embodiments, the included angle formed between the first clamping arm 11 and the first connecting arm 12 is smaller than the included angle formed between the second clamping arm 21 and the second connecting arm 22, so as to ensure that when the first clamping arm 11 and the second clamping arm 21 clamp components such as a square block, the end of the second connecting arm 22 is always higher than the end of the first connecting arm 12. Furthermore, it is ensured that the first driving cylinder 3 can generate a moment on the end of the second connecting arm 22 that can assist the second clamping arm 2 to maintain the clamping state, ensuring the stable and smooth progress of the clamping work.

[0047] See Figure 1 , in some embodiments, the cross-sectional area of the first connecting arm 12 remains the same along the length direction, that is to say, the first connecting arm 12 is a uniform long strip-shaped rod. The cross-sectional area of the second connecting arm 22 gradually decreases from the end close to the second clamping arm 21 towards the end of the second connecting arm 22, that is to say, the cross-sectional area of the second connecting arm 22 gradually decreases from the end close to the second clamping arm 21 towards the end away from the second clamping arm 21. The second connecting arm 22 with such a structural setting forms a reduced end at the end hinged to the first driving cylinder 3, so as to reduce the overall weight of the second connecting arm 22. While meeting the requirements of the clamping force, it can reduce the requirement for the supporting strength of the first driving cylinder 3 on the second clamping arm 2, which is beneficial for the first driving cylinder 3 to assist in supporting the second clamping arm 2.

[0048] In the description of this specification, the description with reference to terms such as "example", "embodiment" or "some embodiments" means that the specific features, structures, materials or characteristics described in connection 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 may be combined in a suitable manner in any one or more embodiments or examples.

[0049] Of course, the present invention is not limited to the above embodiments. Those skilled in the art can make equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent variations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A hydraulic fixture, characterized in that, Comprising: A fixture assembly, including a first clamping arm, a second clamping arm, a first driving cylinder and a second driving cylinder. The first clamping arm has a first clamping portion and a first connecting arm, and the first connecting arm is disposed on a side of the first clamping portion close to the second clamping arm. The second clamping arm has a second clamping portion and a second connecting arm, and the second connecting arm is disposed on a side of the second clamping portion close to the first clamping arm. The first clamping portion and the second clamping portion are oppositely arranged. The end of the second connecting arm is higher than the end of the first connecting arm. The end of the second connecting arm is hinged to the first connecting arm through the first driving cylinder. The end of the first connecting arm is hinged to the second clamping arm. The second driving cylinder is vertically arranged above the second clamping arm, and the output end of the second driving cylinder is hinged to the second connecting arm; A hydraulic assembly for supplying energy to the first driving cylinder and the second driving cylinder. The hydraulic assembly includes a first accumulator, a second accumulator and a third accumulator. The rodless chamber of the first driving cylinder and the rod chamber of the second driving cylinder are connected through a first pipeline. The first accumulator is communicated with the rod chamber of the first 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 second driving cylinder is connected to the first pipeline at a position between the third accumulator and the second driving cylinder. A first electromagnetic directional valve is provided on the first pipeline between the third accumulator and the second pipeline. A second electromagnetic directional valve is provided on the second pipeline. A check valve is provided on the third pipeline.

2. The hydraulic fixture according to claim 1, wherein The end of the first connecting arm is hinged between the second clamping portion and the second connecting arm.

3. The hydraulic fixture according to claim 1, wherein, Pressure sensors are provided on the inner sides of both the first clamping portion and the second clamping portion.

4. The hydraulic fixture according to claim 1, wherein Friction members are provided on the inner sides of both the first clamping portion and the second clamping portion, and anti-slip lines are provided on the outer surfaces of the friction members.

5. The hydraulic fixture according to claim 4, wherein Both the first clamping portion and the second clamping portion are correspondingly hinged to the friction members.

6. The hydraulic fixture according to claim 1, wherein, The included angle formed between the first clamping arm and the first connecting arm is smaller than the included angle formed between the second clamping arm and the second connecting arm.

7. The hydraulic fixture according to claim 1, wherein The cross-sectional area of the first connecting arm remains consistent along the length direction, and the cross-sectional area of the second connecting arm gradually decreases from the end close to the second clamping portion towards the end of the second connecting arm.

8. The hydraulic fixture according to claim 1, wherein The output end of the second driving cylinder is hinged to the second connecting arm through a connecting rod.

9. The hydraulic fixture according to claim 1, characterized in that, A first valve is provided on the fourth pipeline, and a second valve is provided on the first pipeline between the fourth pipeline and the third accumulator.

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