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CN-121993468-A - Unidirectional self-locking assembly for hydraulic locking device and hydraulic locking device

CN121993468ACN 121993468 ACN121993468 ACN 121993468ACN-121993468-A

Abstract

The application discloses a unidirectional self-locking assembly for a hydraulic locking device and the hydraulic locking device, wherein the unidirectional self-locking assembly comprises a fixing frame, a first connecting rod, a second connecting rod, a locking piece, a first connecting rod and a second connecting rod, wherein the fixing frame is positioned at an external station, the first connecting rod is hinged to the fixing frame in a rotating mode and is provided with a butt joint piece, the butt joint piece is provided with a butt joint position and an initial position, the second connecting rod is hinged to the first connecting rod in a movable mode and is provided with a compression piece, the locking piece is arranged on the fixing frame and is provided with a locking position abutting against the compression piece and an unlocking position separated from the compression piece, the second connecting rod is configured to be capable of responding to an external force to act and drive the first connecting rod to swing so as to drive the butt joint piece to switch between the initial position and the butt joint position, and the locking piece is configured to be capable of responding to the external force to switch between the locking position and the unlocking position when the butt joint piece is located at the butt joint position. The application can avoid the direct transmission of radial load to the hydraulic cylinder, prevent the hydraulic cylinder from being damaged, and reduce the manufacturing and maintenance cost of the hydraulic cylinder.

Inventors

  • Bi Wentai
  • GAO JINGCHENG
  • LI XIAOTAO
  • SHI JUNQIANG
  • ZHAN ZHAOBIN
  • WEI KUNCHI

Assignees

  • 北京机械工业自动化研究所有限公司

Dates

Publication Date
20260508
Application Date
20251229

Claims (10)

  1. 1. A unidirectional self-locking assembly for a hydraulic locking device, characterized in that it comprises: A fixed frame (1) positioned at an external station; a first link (2) rotatably hinged to the fixed frame (1) and provided with a docking member (20) for docking with a locked object, the docking member (20) having a docking position for docking with the locked object and an initial position for separation from the locked object; A second connecting rod (3) movably hinged with the first connecting rod (2) and provided with a compression piece, and The locking piece (4) is arranged on the fixing frame (1) and provided with a locking position abutting against the pressure receiving piece and an unlocking position separated from the pressure receiving piece; wherein the second connecting rod (3) is configured to respond to external force and drive the first connecting rod (2) to swing so as to drive the abutting piece (20) to switch between an initial position and an abutting position; the locking member (4) is configured to be movable between a locked position and an unlocked position in response to an external force when the docking member (20) is in the docked position.
  2. 2. The unidirectional self-locking assembly as claimed in claim 1, wherein the pressure receiving member is a connecting shaft (30) penetrating through the second connecting rod (3) and capable of rotating relative to the second connecting rod (3), a pressure receiving portion (300) is formed at the end of the connecting shaft (30), the connecting shaft (30) is used for driving the second connecting rod (3) to act under external force, and the pressure receiving portion (300) is used for abutting against the locking member (4) when the abutting member (20) is in the abutting position.
  3. 3. The unidirectional self-locking assembly of claim 2, further comprising a transmission mechanism comprising: The third connecting rod (5) is provided with a connecting end which is used for being movably hinged with the output end of a hydraulic cylinder (7) of the hydraulic locking device; A transmission shaft (50) having a transmission part (500) formed at an end thereof, and One end of the fourth connecting rod (6) is movably hinged with the third connecting rod (5) through the transmission shaft (50), and the other end of the fourth connecting rod is movably hinged with the second connecting rod (3) through the connecting shaft (30); wherein the third connecting rod (5) is configured to be capable of acting in response to the pressing action of the hydraulic cylinder (7) and to be pressed against the connecting shaft (30) and the locking member (4) through the fourth connecting rod (6) and the transmission shaft (50), respectively.
  4. 4. A unidirectional self-locking assembly as claimed in claim 3, characterized in that the end of the second connecting rod (3) is formed with a first connecting arm (31) and a second connecting arm (32) which are mutually spaced, the end of the third connecting rod (5) is formed with a third connecting arm (51) and a fourth connecting arm (52) which are mutually spaced, one end of the fourth connecting rod (6) extends between the third connecting arm (51) and the fourth connecting arm (52) and is penetrated by the transmission shaft (50), and the other end of the fourth connecting rod (6) extends between the first connecting arm (31) and the second connecting arm (32) and is penetrated by the connecting shaft (30).
  5. 5. A unidirectional self-locking assembly as claimed in claim 3, wherein the holder (1) is provided with a first guide hole (100) and a second guide hole (101), the first guide hole (100) comprising a straight hole section (1000) extending in a first direction and an arcuate hole section (1001) communicating with the straight hole section (1000), the second guide hole (101) extending in the first direction and being spaced from the first guide hole (100); The transmission shaft (50) passes through the first guide hole (100) and is in sliding fit with the inner wall of the first guide hole (100), the connecting shaft (30) passes through the second guide hole (101) and is in sliding fit with the inner wall of the second guide hole (101), the straight hole section (1000) is matched with the second guide hole (101) to limit the relative swing of the third connecting rod (5) and the fourth connecting rod (6), the arc-shaped hole section (1001) is used for guiding the transmission shaft (50) to swing so as to press the locking piece (4) through the transmission part (500) and drive the locking piece (4) to reciprocate along a second direction, and the second direction is perpendicular to the first direction.
  6. 6. A unidirectional self-locking assembly as claimed in claim 5, characterized in that said first link (2) is perpendicular to a first direction when said abutment (20) is in the abutment position, said second link (3) intersecting the first direction and having an included angle of a selected value between 20 ° and 45 °.
  7. 7. A unidirectional self-locking assembly as claimed in claim 5, wherein the locking member (4) is provided with a transmission groove (420) extending in a first direction, the transmission portion (500) extending from the first guiding hole (100) and into the transmission groove (420), the transmission portion (500) being in sliding engagement with an inner wall of the transmission groove (420).
  8. 8. A unidirectional self-locking assembly as claimed in claim 5, characterized in that a guide structure is provided between the locking member (4) and the fixing frame (1), said guide structure being adapted to guide the reciprocating sliding movement of the locking member (4) in the second direction.
  9. 9. The unidirectional self-locking assembly as claimed in any one of claims 1 to 8, wherein the fixing frame (1) comprises a first frame body (10) and a second frame body (11), the first frame body (10) and the second frame body (11) being respectively fixedly connected to an external station; Or, the first frame body (10) and the second frame body (11) are fixedly connected, and one of the first frame body (10) and the second frame body (11) is fixedly connected with an external station.
  10. 10. Hydraulic locking device comprising a hydraulic cylinder (7), characterized in that it further comprises a unidirectional self-locking assembly according to any one of claims 1 to 9, the output of the hydraulic cylinder (7) being connected to the unidirectional self-locking assembly.

Description

Unidirectional self-locking assembly for hydraulic locking device and hydraulic locking device Technical Field The application relates to the technical field of hydraulic equipment, in particular to a unidirectional self-locking assembly for a hydraulic locking device and the hydraulic locking device. Background The hydraulic locking device is a device for locking mechanical parts by utilizing a hydraulic principle, is fixedly connected with a locked target (the mechanical parts to be locked) through the output end of a hydraulic cylinder, and is locked by utilizing hydraulic oil to provide power. The hydraulic locking device is widely applied to mechanical devices such as hoisting equipment, excavators and ships. For example, in industries such as heavy equipment and ships, the hydraulic locking device is often applied to position locking of a heavy-duty structure, so that stability and safety of equipment are ensured. Such hydraulic locking devices in the related art generally achieve locking by inserting a piston rod of a hydraulic cylinder directly into a transmission groove provided on a locked object, through a rigid connection of the piston rod with the locked object. This results in that the load can act directly on the hydraulic cylinder via the piston rod, wherein radial loads are particularly prone to damage to the hydraulic cylinder. Meanwhile, under the heavy-load working condition, the problems are not only aggravated, but also the size of the hydraulic cylinder is increased due to the high requirement of mechanical strength, and the processing cost and the maintenance cost of the hydraulic cylinder are obviously increased. In addition, the hydraulic cylinder in the hydraulic locking device is easy to loosen due to pressure fluctuation, vibration impact, component abrasion and other reasons after long-time use. Disclosure of Invention The present application aims to solve one of the technical problems in the related art to a certain extent. Therefore, the application provides a unidirectional self-locking assembly for a hydraulic locking device and the hydraulic locking device. In order to achieve the purpose, the application adopts the following technical scheme that the unidirectional self-locking assembly for the hydraulic locking device comprises: A mount positioned at the external station; The first connecting rod is rotatably hinged to the fixed frame and is provided with a butt joint piece for being in butt joint with the locked object, and the butt joint piece is provided with a butt joint position for being in butt joint with the locked object and an initial position separated from the locked object; A second connecting rod movably hinged with the first connecting rod and provided with a pressed piece, and The locking piece is arranged on the fixing frame and provided with a locking position abutting against the pressure receiving piece and an unlocking position separated from the pressure receiving piece; The second connecting rod is configured to respond to external force and drive the first connecting rod to swing so as to drive the butt joint piece to switch between an initial position and a butt joint position; the locking member is configured to be moveable between a locked position and an unlocked position in response to an external force when the dock is in the docked position. The one-way self-locking assembly has the advantages that the one-way self-locking assembly can be applied to a hydraulic locking device, the second connecting rod can respond to the output power of the hydraulic cylinder to act and drive the first connecting rod to swing, and the butt joint and the separation of the butt joint piece relative to a locked object are realized. Meanwhile, when the butt joint piece is in butt joint with a locked target, the locking piece can press the pressed piece on the second connecting rod, so that the first connecting rod and the second connecting rod are kept fixed relative to the fixing frame. Therefore, even if the hydraulic cylinder has the problems of pressure fluctuation, vibration impact, component abrasion and the like, the stability of the first connecting rod and the second connecting rod relative to the fixing piece is not affected. Meanwhile, the first connecting rod, the second connecting rod and the fixing frame can bear load acting force, and particularly, radial load is prevented from being directly transmitted to the hydraulic cylinder, so that the hydraulic cylinder can be prevented from being damaged. Similarly, because the load directly acts on the first connecting rod, the second connecting rod and the fixing frame, the size design of the hydraulic cylinder is not directly influenced by the load, the size design of the hydraulic cylinder can be smaller, and the production and manufacturing cost and the overhaul and maintenance cost of the hydraulic cylinder can be obviously reduced. Optionally, the pressure receiving piece is a connecting shaft pen