Bidirectional lock

Abstract

The utility model discloses a bidirectional lock which comprises a valve body, a first cavity and a second cavity are respectively arranged in the valve body, a connecting cavity is arranged between the first cavity and the second cavity in the valve body, and the connecting cavity is communicated with the first cavity and the second cavity. A first direction locking device and a second direction locking device are arranged in the first cavity and the second cavity respectively, a piston is movably connected into the connecting cavity, and the end faces of the two ends of the piston abut against the first direction locking device and the second direction locking device respectively. In combination with the structural design of the utility model, the spacer bush is sleeved on the outer wall of the ejector rod, and the free end of the ejector rod is supported and limited during sliding through the spacer bush, so that the axial stability of the ejector rod is improved, and oscillation caused by starting and closing of a hydraulic system or sudden pressure change is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of two-way locks, in particular to a two-way lock. Background Art

[0002] The two-way lock is usually connected to the cylinder and is used to keep the hydraulic oil in the cylinder chamber at a high pressure after the action is completed, so that the cylinder can remain stable under the action of a large external force. In view of this feature, hydraulic two-way locks are widely used in engineering machinery, mining machinery and other fields.

[0003] However, in some special working conditions, such as the high-power adjustable pitch propeller and the rapid pitch adjustment when the ship is maneuvering, the existing two-way lock has a large gap between the internal parts of the two-way lock, which may cause oscillation and even damage the hydraulic system due to the large working flow and large system inertia, which are difficult to control. In addition, the adjustable pitch propeller hydraulic system may experience a unidirectional negative load in the actual working condition. The system may experience a sudden change in speed under negative load, and the gap inside the two-way lock will also cause a destructive impact on the entire adjustable pitch propeller hydraulic system. Summary of the invention

[0004] The purpose of the utility model is to provide a two-way lock to solve the problem mentioned in the background technology that the existing two-way locks in certain special working conditions, such as the high-power adjustable pitch propeller and the rapid pitch adjustment when the ship is maneuvering, are difficult to control due to the large working flow required, large system inertia, and the large internal parts gap of the two-way lock may cause oscillation and even damage the hydraulic system. In addition, the adjustable pitch propeller hydraulic system may experience a unidirectional negative load in the actual working condition, and the system may experience a sudden speed change under the negative load condition, and the internal gap of the two-way lock may also cause a destructive impact on the entire adjustable pitch propeller hydraulic system.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a two-way lock, comprising a valve body, wherein a first chamber and a second chamber are respectively provided in the valve body, a connecting chamber is provided in the valve body between the first chamber and the second chamber, and the connecting chamber is communicated with the first chamber and the second chamber, a first locking device and a second locking device are respectively provided in the first chamber and the second chamber, a piston is movably connected in the connecting chamber, and end surfaces of the piston respectively conflict with the first locking device and the second locking device.

[0006] Preferably, the first locking device and the second locking device have the same structural design.

[0007] Preferably, the first locking device includes an end sleeve, a push rod, a spring and a spacer sleeve, the end sleeve is fixedly connected to the inner wall of the first chamber, the push rod is slidably connected in the first chamber, the spring is arranged between the push rod and the end sleeve, and the spring, the push rod and the end sleeve are connected, the spacer sleeve is sleeved on the outer wall surface of the push rod, and the outer wall of the spacer sleeve is in contact with the inner wall of the first chamber.

[0008] Preferably, an end seat for fixing the end sleeve is fixedly connected to the inner wall of the first chamber.

[0009] Preferably, the end of the push rod away from the spring contacts the end surface of the piston.

[0010] Preferably, a groove is provided in the middle of the piston surface, and an O-ring is sleeved in the groove.

[0011] Beneficial Effects

[0012] Compared with the existing technology, the beneficial effects of the utility model are:

[0013] In combination with the structural design of the utility model, a spacer sleeve is sleeved on the outer wall of the push rod, and the spacer sleeve is used to support and limit the free end of the push rod when it slides, thereby improving the axial stability of the push rod and avoiding oscillation when the hydraulic system is started and closed or the pressure changes suddenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall internal structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the enlarged structure of point A of the utility model.

[0016] 1. Valve body; 2. First chamber; 3. Second chamber; 4. Connecting chamber; 5. First locking device;

[0017] 6. Second locking device; 7. End seat; 8. Piston; 9. Groove; 10. O-ring; 51. End sleeve;

[0018] 52. Spring; 53. Push rod; 54. Spacer. DETAILED DESCRIPTION

[0019] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "front", "back", "inside", "outside", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore are not to be construed as limiting the present invention. In addition, the terms "first", "second" and "third" are only used for descriptive purposes and are not to be construed as indicating or implying relative importance.

[0021] like Figure 1-2 It is a structural schematic diagram of a two-way lock of a preferred embodiment of the utility model. In this embodiment, a two-way lock includes a valve body 1, in which a first chamber 2 and a second chamber 3 are respectively opened, and a connecting chamber 4 is opened in the valve body 1 between the first chamber 2 and the second chamber 3, and the connecting chamber 4 is communicated with the first chamber 2 and the second chamber 3, and a first locking device 5 and a second locking device 6 are respectively arranged in the first chamber 2 and the second chamber 3, and a piston 8 is movably connected in the connecting chamber 4, and the end surfaces of the piston 8 are respectively in conflict with the first locking device 5 and the second locking device 6. This structural design realizes the operation of the first locking device 5 and the second locking device 6 by the piston 8 moving in the connecting chamber 4 and pushing one of the first locking device 5 and the second locking device 6.

[0022] In this embodiment, the first locking device 5 and the second locking device 6 have the same structural design.

[0023] In this embodiment, the first locking device 5 includes an end sleeve 51, a push rod 53, a spring 52 and a spacer sleeve 54. The end sleeve 51 is fixedly connected to the inner wall of the first chamber 2, the push rod 53 is slidably connected in the first chamber 2, the spring 52 is arranged between the push rod 53 and the end sleeve 51, and the spring 52 is connected to the push rod 53 and the end sleeve 51. The spacer sleeve 54 is sleeved on the outer wall surface of the push rod 53, and the outer wall of the spacer sleeve 54 is in contact with the inner wall of the first chamber 2. The free end of the push rod 53 is supported and limited by the spacer sleeve 54 when it slides, thereby improving the axial stability of the push rod 53 and avoiding oscillations that occur when the hydraulic system is started and closed or the pressure changes suddenly.

[0024] In this embodiment, the inner wall of the first chamber 2 is fixedly connected with an end seat 7 for fixing the end sleeve 51 , and its structural design plays a role in fixing the end sleeve 51 when the push rod 53 compresses the spring 52 .

[0025] In this embodiment, the end of the push rod 53 away from the spring 52 abuts against the end surface of the piston 8. With this structural design, the piston 8 slides through the push rod 53 to realize the operation of the locking device.

[0026] In this embodiment, a groove 9 is provided in the middle of the surface of the piston 8 , and an O-ring 10 is sleeved in the groove 9 . This structural design ensures the sealing between the piston 8 and the inner wall of the connecting chamber 4 .

[0027] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. A two-way lock, comprising a valve body (1), characterized in that: The valve body (1) is provided with a first chamber (2) and a second chamber (3), and a connecting chamber (4) is provided between the first chamber (2) and the second chamber (3) in the valve body (1), and the connecting chamber (4) is communicated with the first chamber (2) and the second chamber (3). The first chamber (2) and the second chamber (3) are provided with a first locking device (5) and a second locking device (6), respectively. A piston (8) is movably connected in the connecting chamber (4), and end surfaces of both ends of the piston (8) are in contact with the first locking device (5) and the second locking device (6), respectively.

2. A two-way lock according to claim 1, characterized in that: The first locking device (5) and the second locking device (6) have the same structural design.

3. A two-way lock according to claim 2, characterized in that: The first locking device (5) comprises an end sleeve (51), a push rod (53), a spring (52) and a spacer sleeve (54); the end sleeve (51) is fixedly connected to the inner wall of the first chamber (2); the push rod (53) is slidably connected in the first chamber (2); the spring (52) is arranged between the push rod (53) and the end sleeve (51); and the spring (52), the push rod (53) and the end sleeve (51) are connected; the spacer sleeve (54) is sleeved on the outer wall surface of the push rod (53); and the outer wall of the spacer sleeve (54) is in contact with the inner wall of the first chamber (2).

4. A two-way lock according to claim 3, characterized in that: An end seat (7) for fixing an end sleeve (51) is fixedly connected to the inner wall of the first chamber (2).

5. A two-way lock according to claim 3, characterized in that: The end of the push rod (53) away from the spring (52) contacts the end surface of the piston (8).

6. A two-way lock according to claim 5, characterized in that: A groove (9) is provided in the middle of the surface of the piston (8), and an O-ring (10) is sleeved in the groove (9).

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