One-way self-locking assembly for hydraulic locking device and hydraulic locking device

Abstract

The invention discloses a one-way self-locking assembly used for a hydraulic locking device and the hydraulic locking device, and the one-way self-locking assembly comprises a fixing frame, a locking mechanism and a locking mechanism, the first connecting rod is rotationally hinged to the fixing frame and provided with a butt joint piece, and the butt joint piece is provided with a butt joint position and an initial position; the second connecting rod is movably hinged to the first connecting rod and is provided with a pressed part; the locking piece is arranged on the fixing frame and provided with a locking position abutting against the pressed piece and an unlocking position separated from the pressed piece; the second connecting rod is configured to act in response to external acting force and drive the first connecting rod to swing so as to drive the butt joint piece to be switched between the initial position and the butt joint position. The locking piece is configured to respond to external acting force to be switched between the locking position and the unlocking position when the butt joint piece is located at the butt joint position. The radial load can be prevented from being directly transmitted to the hydraulic cylinder, the hydraulic cylinder is prevented from being damaged, and meanwhile the manufacturing and overhauling cost of the hydraulic cylinder can be reduced.

Description

Technical Field

[0001] This application relates to the field of hydraulic equipment technology, specifically to a one-way self-locking component and a hydraulic locking device for a hydraulic locking device. Background Technology

[0002] A hydraulic locking device is a device that uses hydraulic principles to lock mechanical components. It connects and fixes the output end of a hydraulic cylinder to the target (the mechanical component to be locked), using hydraulic oil to provide power for locking. Hydraulic locking devices are widely used in lifting equipment, excavators, and ships. In industries such as heavy equipment and shipbuilding, hydraulic locking devices are often used for position locking of heavy-duty structures to ensure the stability and safety of the equipment.

[0003] Hydraulic locking devices of this type in related technologies generally achieve locking by directly inserting the piston rod of the hydraulic cylinder into a transmission groove provided on the target being locked, and achieving locking through a rigid connection between the piston rod and the target. This results in the load being directly applied to the hydraulic cylinder through the piston rod, with radial loads being particularly prone to damaging the hydraulic cylinder. Furthermore, under heavy-load conditions, these problems are not only exacerbated, but the increased mechanical strength requirements also necessitate larger hydraulic cylinders, significantly increasing manufacturing and maintenance costs. Additionally, after prolonged use, the hydraulic cylinder in the aforementioned hydraulic locking device is prone to loosening due to pressure fluctuations, vibration, impact, and component wear. Summary of the Invention

[0004] This application aims to address one of the technical problems in related technologies to a certain extent. To this end, this application provides a one-way self-locking assembly and a hydraulic locking device for a hydraulic locking mechanism.

[0005] To achieve the above objectives, this application adopts the following technical solution: a one-way self-locking assembly for a hydraulic locking device, the one-way self-locking assembly comprising:

[0006] Fixed frame, which is positioned at an external workstation;

[0007] The first link is rotatably hinged to the fixed frame and is provided with a docking part for docking with the locked target. The docking part has a docking position for docking with the locked target and an initial position for separation from the locked target.

[0008] The second link, which is movably hinged to the first link and is provided with a pressure-bearing member; and...

[0009] A locking element is disposed on a fixing frame and has a locking position that abuts against the pressure member and an unlocking position that is separated from the pressure member;

[0010] The second link is configured to move in response to an external force and drive the first link to swing, thereby causing the docking member to switch between an initial position and a docking position.

[0011] The locking element is configured to switch between a locked position and an unlocked position in response to an external force when the docking member is in the docking position.

[0012] The application of this invention offers the following advantages: The one-way self-locking assembly can be used in a hydraulic locking device. The second link can respond to the output power of the hydraulic cylinder, driving the first link to swing, thus achieving the docking and separation of the docking parts relative to the locked target. Simultaneously, when the docking parts are docked with the locked target, the locking element applies pressure to the pressure-bearing parts on the second link, keeping the first and second links fixed relative to the fixed frame. Therefore, even if the hydraulic cylinder experiences pressure fluctuations, vibration, shock, or component wear, it will not affect the stability of the first and second links relative to the fixed component. Furthermore, the first link, second link, and fixed frame can bear the load force, especially preventing the direct transmission of radial loads to the hydraulic cylinder, thus preventing damage to the hydraulic cylinder. Similarly, since the load acts directly on the first link, second link, and fixed frame, the size design of the hydraulic cylinder is not directly affected by the load, allowing for a smaller hydraulic cylinder design, significantly reducing manufacturing and maintenance costs.

[0013] Optionally, the pressure-bearing member is a connecting shaft that passes through the second connecting rod and can rotate relative to the second connecting rod. The end of the connecting shaft is formed with a pressure-bearing part. The connecting shaft is used to drive the second connecting rod to move under external force. The pressure-bearing part is used to abut against the locking member when the docking member is in the docking position.

[0014] Optionally, the one-way self-locking assembly further includes a transmission mechanism, the transmission mechanism comprising:

[0015] The third link has a connecting end for movably hinged to the output end of the hydraulic cylinder of the hydraulic locking device;

[0016] A drive shaft having a drive section formed at its end; and,

[0017] The fourth link has one end hinged to the third link via the drive shaft and the other end hinged to the second link via the connecting shaft;

[0018] The third link is configured to act in response to the pressure applied by the hydraulic cylinder and apply pressure to the connecting shaft and the locking element via the fourth link and the drive shaft, respectively.

[0019] Optionally, the end of the second link is formed with a first connecting arm and a second connecting arm spaced apart from each other, and the end of the third link is formed with a third connecting arm and a fourth connecting arm spaced apart from each other. One end of the fourth link extends between the third connecting arm and the fourth connecting arm and all three are penetrated by a drive shaft, and the other end of the fourth link extends between the first connecting arm and the second connecting arm and all three are penetrated by a connecting shaft.

[0020] Optionally, the fixing frame is provided with a first guide hole and a second guide hole. The first guide hole includes a straight hole section extending along a first direction and an arc-shaped hole section communicating with the straight hole section. The second guide hole extends along the first direction and is spaced apart from the first guide hole. The drive shaft passes through the first guide hole and is slidably engaged with the inner wall of the first guide hole. The connecting shaft passes through the second guide hole and is slidably engaged with the inner wall of the second guide hole. The straight hole section and the second guide hole cooperate to restrict the relative swinging of the third link and the fourth link. The arc-shaped hole section is used to guide the swinging of the drive shaft so as to apply pressure to the locking member through the transmission part and drive the locking member to reciprocate along the second direction, which is perpendicular to the first direction.

[0021] Optionally, when the docking member is in the docking position, the first connecting rod is perpendicular to the first direction, and the second connecting rod intersects the first direction at an angle between 20° and 45°.

[0022] Optionally, the locking member is provided with a transmission groove extending along a first direction, the transmission part extends out of the first guide hole and into the transmission groove, and the transmission part slides in cooperation with the inner wall of the transmission groove.

[0023] Optionally, a guide structure is provided between the locking member and the fixing frame, the guide structure being used to guide the locking member to slide back and forth along the second direction.

[0024] Optionally, the fixed frame includes a first frame and a second frame, which are respectively fixed to an external workstation; or, the first frame and the second frame are fixedly connected, and one of the first frame and the second frame is fixedly connected to the external workstation.

[0025] Furthermore, this application also provides a hydraulic locking device, including a hydraulic cylinder, which further includes a one-way self-locking component as described in any of the above technical solutions, wherein the output end of the hydraulic cylinder is connected to the one-way self-locking component. The reasoning process for the beneficial effects of the hydraulic locking device provided in this application and the aforementioned one-way self-locking component is similar, and will not be repeated here.

[0026] These features and advantages of this application will be disclosed in detail in the following specific embodiments and accompanying drawings. The best embodiments or means of this application will be shown in detail in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of this application. In addition, each of these features, elements and components appearing in the following text and drawings is multiple and is labeled with different symbols or numbers for convenience, but all represent parts with the same or similar structure or function. Attached Figure Description

[0027] The following description, in conjunction with the accompanying drawings, further illustrates this application:

[0028] Figure 1 A schematic diagram illustrating the application of the hydraulic locking device of the one-way self-locking assembly provided in the embodiments of this application when the docking parts are in the initial position;

[0029] Figure 2 for Figure 1 A cross-sectional view of the hydraulic locking device in the middle;

[0030] Figure 3 This is a schematic diagram illustrating the application of a hydraulic locking device when the mating parts are in the mating position and the locking parts are in the unlocked position.

[0031] Figure 4 for Figure 3 A cross-sectional view of the hydraulic locking device in the middle;

[0032] Figure 5 This is a schematic diagram illustrating the application of a hydraulic locking device when the mating parts are in the mating position and the locking parts are in the locked position.

[0033] Figure 6 for Figure 5 A cross-sectional view of the hydraulic locking device in the middle;

[0034] Figure 7 for Figure 5 Side view of the hydraulic locking device in the middle;

[0035] Figure 8 This is an assembly diagram of the locking components and the second frame.

[0036] Figure 9 This is a schematic diagram of the movable hinges of the second, third, and fourth links.

[0037] The components are as follows: 1. Fixing frame; 10. First frame body; 100. First guide hole; 1000. Straight hole section; 1001. Arc-shaped hole section; 101. Second guide hole; 11. Second frame body; 110. Guide groove; 2. First connecting rod; 20. Connecting part; 3. Second connecting rod; 30. Connecting shaft; 300. Pressure-bearing part; 31. First connecting arm; 32. Second connecting arm; 4. Locking part; 40. Sliding block part; 41. Pressure block part; 42. Support part; 420. Transmission groove; 5. Third connecting rod; 50. Transmission shaft; 500. Transmission part; 51. Third connecting arm; 52. Fourth connecting arm; 6. Fourth connecting rod; 7. Hydraulic cylinder; 70. Piston rod; 8. Support seat; 9. Locked target; 90. Connecting groove. Detailed Implementation

[0038] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain this application and should not be construed as limiting it.

[0039] In the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] This embodiment provides a one-way self-locking component, which can be applied to hydraulic locking devices. For example... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the hydraulic locking device further includes a hydraulic cylinder 7. The output end of the hydraulic cylinder 7 is connected to a one-way self-locking assembly, and the locking and positioning of the locked target 9 is achieved by driving the one-way self-locking assembly to move. The one-way self-locking assembly includes a fixed frame 1, a first connecting rod 2, a second connecting rod 3, and a locking member 4. The fixed frame 1 is positioned at an external workstation, the first connecting rod 2 is rotatably hinged to the fixed frame 1, and the first connecting rod 2 is provided with a docking member 20 for docking with the locked target 9. The docking member 20 has a docking position for docking with the locked target 9 and an initial position for separation from the locked target 9. Specifically, in this embodiment, the docking member 20 is a locking block structure formed at the end of the first connecting rod 2. Correspondingly, the locked target 9 is provided with a docking groove 90 adapted to the locking block structure. When the docking member 20 is in the docking position, the locking block structure is engaged into the docking groove 90. It is easy to understand that a support base 8 is fixedly provided at the external workstation, and the locked target 9 is provided on the support base 8.

[0043] In this embodiment, the second link 3 is hinged to the first link 2, and the second link 3 is configured to move in response to an external force and drive the first link 2 to swing, thereby switching the docking member 20 between the initial position and the docking position. That is, the second link 3 can move in response to the output power of the hydraulic cylinder 7 and drive the first link 2 to swing, so as to realize the docking and separation of the docking member 20 relative to the locked target 9.

[0044] In addition, the second link 3 is provided with a pressure-bearing component, and the locking component 4 is provided on the fixed frame 1. The locking component 4 has a locking position that abuts against the pressure-bearing component and an unlocking position that is separated from the pressure-bearing component. The locking component 4 is configured to switch between the locked position and the unlocking position in response to external force when the docking component 20 is in the docking position. Through the above structural design, when the docking component 20 docks with the locked target 9, the locking component 4 can apply pressure to the pressure-bearing component on the second link 3, thereby keeping the first link 2 and the second link 3 fixed relative to the fixed frame 1. Therefore, even if the hydraulic cylinder 7 experiences pressure fluctuations, vibration impacts, component wear, or other problems, it will not affect the stability of the first link 2 and the second link 3 relative to the fixed component. At the same time, the first link 2, the second link 3, and the fixed frame 1 can bear the load force, especially avoiding the direct transmission of radial loads to the hydraulic cylinder 7, thus preventing damage to the hydraulic cylinder 7. Similarly, since the load acts directly on the first link 2, the second link 3 and the fixed frame 1, the size design of the hydraulic cylinder 7 is not directly affected by the load, and the size of the hydraulic cylinder 7 can be designed to be smaller, which can significantly reduce the production and maintenance costs of the hydraulic cylinder 7.

[0045] In this embodiment, the pressure-bearing component is a connecting shaft 30 that passes through the second connecting rod 3 and is rotatable relative to the second connecting rod 3. A pressure-bearing portion 300 is formed at the end of the connecting shaft 30. The connecting shaft 30 is used to drive the second connecting rod 3 to move under external force, and the pressure-bearing portion 300 is used to abut against the locking component 4 when the docking component 20 is in the docking position. Furthermore, in the one-way self-locking assembly provided in this embodiment, the second connecting rod 3 is indirectly connected to the output end of the hydraulic cylinder 7. Specifically, a transmission mechanism is also provided between the output end of the hydraulic cylinder and the pressure-bearing component on the second connecting rod 3, and the output power of the hydraulic cylinder 7 is transmitted to the pressure-bearing component and the second connecting rod 3 through the transmission mechanism.

[0046] like Figure 1 , Figure 3 and Figure 5 As shown, the transmission mechanism includes a third link 5, a fourth link 6, and a transmission shaft 50. The third link 5 has a connecting end for hinged movably to the output end of the hydraulic cylinder 7 of the hydraulic locking device, and the transmission shaft 50 has a transmission section 500 formed at its end. One end of the fourth link 6 is hinged to the third link 5 via the transmission shaft 50, and the other end of the fourth link 6 is hinged to the second link 3 via a connecting shaft 30. The third link 5 is configured to operate in response to the pressure applied by the hydraulic cylinder 7, and to apply pressure to the second link 3 and the locking member 4 via the fourth link 6 and the transmission shaft 50, respectively.

[0047] Specifically, the third link 5, the fourth link 6, the second link 3, and the first link 2 are connected in sequence. One end of the third link 5 forms the connecting end, and the end of the piston rod 70 of the hydraulic cylinder 7 is the output end of the hydraulic cylinder 7. The third link 5 is movably hinged to the end of the piston rod 70 through the connecting end. The other end of the third link 5 is movably hinged to one end of the fourth link 6 through the transmission shaft 50, and the other end of the fourth link 6 is movably hinged to one end of the second link 3 through the connecting shaft 30. The other end of the second link 3 is movably hinged to one end of the first link 2, and the other end of the first link 2 is movably hinged to the fixed frame 1. When the hydraulic cylinder 7 is working, the piston rod 70 of the hydraulic cylinder 7 pushes outward, which drives the third link 5, the fourth link 6, the second link 3, and the first link 2 to move.

[0048] like Figure 1 As shown, the mounting frame 1 in this embodiment includes a first frame 10 and a second frame 11, both of which are fixedly installed to an external workstation. Specifically, the mounting frame 1 can be fixedly installed to the external workstation using welding or bolt connections. In other optional embodiments, the first frame 10 and the second frame 11 can be fixedly installed, and then one of the first frame 10 and the second frame 11 can be fixedly installed to the external workstation.

[0049] Combination Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, in this embodiment, a first guide hole 100 and a second guide hole 101 are provided on the first frame 10. The first guide hole 100 includes a straight hole segment 1000 extending along a first direction and an arc-shaped hole segment 1001 communicating with the straight hole segment 1000. The first direction in this embodiment refers to... Figure 2The direction indicated by the middle arrow P is the extension direction of the piston rod 70 of the hydraulic cylinder 7. The drive shaft 50 passes through the first guide hole 100 and slides against the inner wall of the first guide hole 100. That is, during the process of the piston rod 70 extending outward and pushing the third connecting rod 5, the drive shaft 50 slides along the straight hole section 1000 and the arc-shaped hole section 1001. The second guide hole 101 extends along the first direction and is spaced apart from the first guide hole 100. The connecting shaft 30 passes through the second guide hole 101 and slides against the inner wall of the second guide hole 101. That is, during the process of the piston rod 70 extending outward and pushing the third connecting rod 5, the connecting shaft 30 slides along the second guide hole 101. By cooperating with the straight hole section 1000 and the second guide hole 101, the relative swinging of the third link 5 and the fourth link 6 can be restricted. Therefore, during the sliding of the transmission shaft 50 along the straight hole section 1000 and the sliding of the connecting shaft 30 along the second guide hole 101, the included angle between the third link 5 and the fourth link 6 remains unchanged because the piston rod 70, the transmission shaft 50, and the connecting shaft 30 all move in the first direction. During this process, the second link 3 swings relative to the fourth link 6. Simultaneously, the second link 3 drives the first link 2 to swing relative to the fixed frame 1, which can drive the first link 2 to switch the docking member 20 from the initial position to the docking position.

[0050] The arc-shaped bore section 1001 is used to guide the swing of the drive shaft 50. That is, when the drive shaft 50 moves along the first direction to the bottom of the straight bore section 1000, the piston rod 70 of the hydraulic cylinder 7 continues to push the third connecting rod 5, allowing the drive shaft 50 to slide from the straight bore section 1000 into the arc-shaped bore section 1001. During the sliding process of the drive shaft 50 along the arc-shaped bore section 1001, the transmission part 500 on the drive shaft 50 can apply pressure to the locking member 4 and drive the locking member 4 to reciprocate along the second direction. The second direction is perpendicular to the first direction. Specifically, the second direction is... Figure 2 The direction indicated by the middle arrow S. Further, in this embodiment, a transmission groove 420 extending along the first direction is provided on the locking member 4. The transmission part 500 extends from the first guide hole 100 and into the transmission groove 420, and the transmission part 500 slides in cooperation with the inner wall of the transmission groove 420. Thus, during the sliding of the transmission shaft 50 along the arc-shaped hole segment 1001, the transmission part 500 can apply pressure to the inner wall of the transmission groove 420 and drive the locking member 4 to slide along the second direction, thereby allowing the locking member 4 to switch from the unlocked position to the locked position. Along a third direction perpendicular to the first and second directions, when the locking member 4 is in the unlocked position, the transmission groove 420 is aligned with the straight hole segment 1000, so that the transmission shaft 50 can extend from the straight hole segment 1000 and the transmission part 500 can extend into the transmission groove 420. The third direction is... Figure 7 The direction indicated by the middle arrow F.

[0051] To improve the sliding stability of the locking member 4, a guide structure is also provided between the locking member 4 and the fixing frame 1 in this embodiment. The guide structure is used to guide the locking member 4 to slide back and forth in the second direction. Specifically, in conjunction with Figure 8 As shown, the locking member 4 in this embodiment is a block structure, comprising a slider portion 40, a pressure block portion 41, and a support portion 42 formed integrally. The guide structure includes a guide groove 110 disposed on the second frame 11 and a protruding edge disposed on the slider portion 40, the protruding edge extending into the guide groove 110 and the two slidingly engaging. The pressure block portion 41 is used to abut against the pressure-receiving portion 300 when the locking member 4 is in the locked position. The aforementioned transmission groove 420 is disposed on the support portion 42. It is readily understood that the transmission groove 420 in this embodiment is a through groove, that is, the transmission groove 420 is disposed through the support portion 42 along the aforementioned third direction. Optionally, the transmission groove 420 may also be a recess that does not penetrate the support portion 42.

[0052] like Figure 1 As shown, in this embodiment, the first frame 10, the second frame 11, and the locking member 4 are each provided with two sets, distributed on both sides of the first connecting rod 2, the second connecting rod 3, the third connecting rod 5, and the fourth connecting rod 6. Thus, both ends of the connecting shaft 30 can form the pressure-bearing portion 300, and the two sets of locking members 4 can respectively abut against the pressure-bearing portion 300, strengthening the locking of the locking members 4 against the first connecting rod 2 and the second connecting rod 3. Furthermore, in conjunction with... Figure 7 and Figure 9 As shown, in this embodiment, the end of the second connecting rod 3 has a first connecting arm 31 and a second connecting arm 32 spaced apart from each other, and the end of the third connecting rod 5 has a third connecting arm 51 and a fourth connecting arm 52 spaced apart from each other. One end of the fourth connecting rod 6 extends between the third connecting arm 51 and the fourth connecting arm 52, and all three are penetrated by the drive shaft 50. The other end of the fourth connecting rod 6 extends between the first connecting arm 31 and the second connecting arm 32, and all three are penetrated by the connecting shaft 30. With the above structural arrangement, the central axes of the first connecting rod 2, the second connecting rod 3, the third connecting rod 5, and the fourth connecting rod 6 are all located in the same plane, which facilitates the symmetrical arrangement of the first frame 10, the second frame 11, and the locking member 4 relative to the first connecting rod 2, the second connecting rod 3, the third connecting rod 5, and the fourth connecting rod 6.

[0053] The following is combined with Figures 1 to 6 The working process of the hydraulic locking device using the one-way self-locking component provided in this embodiment will be described as follows:

[0054] like Figure 1 and Figure 2As shown, the hydraulic locking device is in its initial state at this time. The docking member 20 is in its initial position, and the locking member 4 is in the unlocked position. The hydraulic cylinder 7 is controlled to operate, and its piston rod 70 extends along the first direction and pushes the third link 5 through its connecting end. Because the connecting shaft 30 and the transmission shaft 50 are restricted by the second guide hole 101 and the straight hole section 1000 respectively, they can only slide along the first direction. The third link 5 and the fourth link 6 will not swing relative to each other, but will only move along the first direction. During its movement along the first direction, the fourth link 6 will apply pressure to the second link 3 through the connecting shaft 30. The second link 3 will not only move downwards but will also swing relative to the fourth link 6 and the first link 2 respectively. Simultaneously, the first link 2 will swing relative to the fixed frame 1 under the influence of the second link 3 until the docking member 20 on the first link 2 switches to the docking position. After completing the above process, the hydraulic locking device... Figure 3 and Figure 4 The state shown.

[0055] like Figure 4 As shown, at this point, the connecting shaft 30 has reached the bottom of the second guide hole 101, and the transmission shaft 50 has reached the bottom of the straight hole section 1000. The piston rod 70 continues to move in the first direction. Since the connecting shaft 30 is restricted by the bottom wall of the second guide hole 101 and can no longer move in the first direction, the third connecting rod 5 will swing relative to the fourth connecting rod 6 under the push of the piston rod 70, causing the transmission shaft 50 to slide from the straight hole section 1000 to the arc-shaped hole section 1001. Subsequently, during the sliding of the transmission shaft 50 along the arc-shaped hole section 1001, the transmission part 500 extending into the transmission groove 420 will apply pressure to the inner wall of the transmission groove 420 in the second direction, thereby driving the locking member 4 to move in the second direction and causing the locking member 4 to switch from the unlocked position to the locked position. After completing the above process, the hydraulic locking device is as follows: Figure 5 and Figure 6 The state shown.

[0056] like Figure 6 and Figure 7As shown, at this time, the pressure block 41 on the locking member 4 abuts against the pressure receiving part 300. The first connecting rod 2, the second connecting rod 3, and the first frame 10 form a stable triangular structure. The locking member 4 locks the first connecting rod 2 and the second connecting rod 3 relative to the fixed frame 1. The load can be transmitted to the first frame 10, the locking member 4, and the second frame 11 through the first connecting rod 2 and the second connecting rod 3, which can avoid the radial load being directly transmitted to the hydraulic cylinder 7 and prevent damage to the hydraulic cylinder 7. Preferably, when the docking member 20 is in the docking position, the first connecting rod 2 is perpendicular to the first direction, and the second connecting rod 3 intersects the first direction with an included angle of 30°. The above structural design makes it easier for the load to be transmitted to the first frame 10, the locking member 4, and the second frame 11. In other optional embodiments, the included angle between the second connecting rod 3 and the first direction can also be a selected value between 20° and 45°.

[0057] When it is necessary to unlock the locked target 9, the hydraulic cylinder 7 can be controlled to operate, causing the piston rod 70 to retract in the reverse direction of the first direction. The piston rod 70 will drive the third connecting rod 5 to swing relative to the fourth connecting rod 6, and cause the transmission shaft 50 to slide along the arc-shaped hole section 1001. During this process, the transmission part 500 can apply a force in the reverse direction of the second direction to the inner wall of the transmission groove 420, thereby driving the locking member 4 to slide in the reverse direction of the second direction, so as to switch the locking member 4 from the locked position to the unlocked position. Afterwards, the piston rod 70 continues to retract in the reverse direction of the first direction, and the third connecting rod 5 and the fourth connecting rod 6 slide in the reverse direction of the first direction, thereby driving the connecting shaft 30 to slide in the reverse direction of the first direction along the second guide hole 101, which in turn drives the second connecting rod 3 to move. Afterwards, the second connecting rod 3 moves and drives the first connecting rod 2 to swing relative to the fixed frame 1, so that the docking member 20 can switch from the docking position to the initial position, completing the unlocking process.

[0058] It should be noted that in this embodiment, the second connecting rod 3 in the one-way self-locking assembly is indirectly connected to the output end of the hydraulic cylinder 7. In other optional embodiments, the output end of the hydraulic cylinder 7 can also be directly hinged to the second connecting rod 3 via the connecting shaft 30. In this case, a drive unit can be additionally provided to drive the locking member 4 to switch between the locked and unlocked positions. Thus, when the piston rod 70 drives the second connecting rod 3 to move and causes the connecting shaft 30 to be located at the bottom of the second guide hole 101, and causes the docking member 20 to switch to the docking position, the drive unit can drive the locking member 4 to switch from the unlocked position to the locked position, so that the locking member 4 abuts against the pressure portion 300 on the connecting shaft 30. The drive unit can be a linear actuator, such as an electric push rod or a pneumatic rod.

[0059] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Those skilled in the art should understand that this application includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this application will be included within the scope of the claims.

Claims

1. A one-way self-locking assembly for a hydraulic locking device, characterized in that, The one-way self-locking component includes: A fixed frame (1) is positioned at an external workstation; The first link (2) is rotatably hinged to the fixed frame (1) and is provided with a docking part (20) for docking with the locked target. The docking part (20) has a docking position for docking with the locked target and an initial position for separating from the locked target. The second link (3) is movably hinged to the first link (2) and is provided with a pressure-bearing member; and, Locking member (4), which is disposed on the fixing frame (1) and has a locking position abutting against the pressure member and an unlocking position separating from the pressure member; The second link (3) is configured to move in response to an external force and drive the first link (2) to swing, thereby causing the docking member (20) to switch between an initial position and a docking position; The locking member (4) is configured to switch between a locked position and an unlocked position in response to an external force when the docking member (20) is in the docking position.

2. The one-way self-locking component as described in claim 1, characterized in that, The pressure-bearing component is a connecting shaft (30) that passes through the second connecting rod (3) and can rotate relative to the second connecting rod (3). The end of the connecting shaft (30) is formed with a pressure-bearing part (300). The connecting shaft (30) is used to drive the second connecting rod (3) to move under external force. The pressure-bearing part (300) is used to abut against the locking component (4) when the docking component (20) is in the docking position.

3. The one-way self-locking component as described in claim 2, characterized in that, The one-way self-locking assembly further includes a transmission mechanism, the transmission mechanism comprising: The third link (5) has a connecting end for movably hinged to the output end of the hydraulic cylinder (7) of the hydraulic locking device; Drive shaft (50), the end of which is formed with a drive section (500); and, The fourth link (6) has one end hinged to the third link (5) via the drive shaft (50) and the other end hinged to the second link (3) via the connecting shaft (30); The third link (5) is configured to act in response to the pressure applied by the hydraulic cylinder (7) and apply pressure to the connecting shaft (30) and the locking member (4) respectively via the fourth link (6) and the drive shaft (50).

4. The one-way self-locking component as described in claim 3, characterized in that, The end of the second link (3) is formed with a first connecting arm (31) and a second connecting arm (32) spaced apart from each other. The end of the third link (5) is formed with a third connecting arm (51) and a fourth connecting arm (52) spaced apart from each other. One end of the fourth link (6) extends between the third connecting arm (51) and the fourth connecting arm (52) and all three are penetrated by the drive shaft (50). The other end of the fourth link (6) extends between the first connecting arm (31) and the second connecting arm (32) and all three are penetrated by the connecting shaft (30).

5. The one-way self-locking component as described in claim 3, characterized in that, The fixing frame (1) is provided with a first guide hole (100) and a second guide hole (101). The first guide hole (100) includes a straight hole segment (1000) extending along a first direction and an arc-shaped hole segment (1001) communicating with the straight hole segment (1000). The second guide hole (101) extends along the first direction and is spaced apart from the first guide hole (100). The drive shaft (50) passes through the first guide hole (100) and slides with the inner wall of the first guide hole (100). The connecting shaft (30) passes through the second guide hole (101) and slides with the inner wall of the second guide hole (101). The straight hole section (1000) cooperates with the second guide hole (101) to restrict the relative swing of the third link (5) and the fourth link (6). The arc-shaped hole section (1001) is used to guide the drive shaft (50) to swing so as to apply pressure to the locking member (4) through the transmission part (500) and drive the locking member (4) to reciprocate along the second direction, which is perpendicular to the first direction.

6. The one-way self-locking component as described in claim 5, characterized in that, When the docking member (20) is in the docking position, the first link (2) is perpendicular to the first direction, and the second link (3) intersects the first direction at an angle between 20° and 45°.

7. The one-way self-locking component as described in claim 5, characterized in that, The locking member (4) is provided with a transmission groove (420) extending in a first direction. The transmission part (500) extends out from the first guide hole (100) and into the transmission groove (420). The transmission part (500) slides in cooperation with the inner wall of the transmission groove (420).

8. The one-way self-locking component as described in claim 5, characterized in that, A guide structure is provided between the locking member (4) and the fixing frame (1), and the guide structure is used to guide the locking member (4) to slide back and forth in the second direction.

9. The one-way self-locking component as described in any one of claims 1 to 8, characterized in that, The fixed frame (1) includes a first frame (10) and a second frame (11), and the first frame (10) and the second frame (11) are respectively fixed to the external work station; Alternatively, the first frame (10) and the second frame (11) are fixedly connected, and one of the first frame (10) and the second frame (11) is fixedly connected to an external workstation.

10. A hydraulic locking device, comprising a hydraulic cylinder (7), characterized in that, The hydraulic locking device further includes a one-way self-locking component as described in any one of claims 1 to 9, wherein the output end of the hydraulic cylinder (7) is connected to the one-way self-locking component.

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