A high-stability bidirectional hydraulic lock

Abstract

The utility model discloses a two -way hydraulic lock of high stability, including valve body and the screw plug of screwing in the two side walls of valve body, the sidewall of valve body is provided with anti -loose mechanism to each screw plug's correspondence, the anti -loose mechanism includes an anti -loose ring of being movably established in valve body, and the inner diameter wall of anti -loose ring is evenly provided with a plurality of inward bulging's clamping block along the circumference, the head outer diameter wall of screw plug is correspondingly set up and is provided with the clamping groove of the clamping block of carding into, still be equipped with the locking assembly of being used for locking anti -loose ring in the mutual clamping position of clamping block and clamping groove of valve body. The utility model has improved two -way hydraulic lock's sealing reliability and locking function stability under the long -term severe vibration working condition, effectively prevent hydraulic oil leakage and function failure, have guaranteed equipment operation safety, with compact structure, anti -loose effect reliable, the advantage that practicality is strong.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic lock technology, specifically to a highly stable bidirectional hydraulic lock. Background Technology

[0002] Two-way hydraulic locks, as an important hydraulic control component, are widely used in hydraulic circuits of construction machinery, transport vehicles, and lifting equipment that require maintaining the stable position of the hydraulic cylinder, such as the outrigger hydraulic circuits of truck cranes and tire cranes. Their core working principle is as follows: when oil enters one chamber in the forward direction, it pushes the valve core to open, allowing oil to return to the other chamber in the reverse direction; when oil enters both chambers, the hydraulic circuits in both directions are closed, thus reliably locking the cylinder piston rod in a predetermined position, unaffected by changes in external load or oil pipe rupture, ensuring the safety and stability of the equipment.

[0003] In existing technologies, such as the bidirectional hydraulic lock disclosed in Chinese Patent No. CN2212101Y, its basic structure includes a valve body, screw plugs disposed at both ends of the valve body, and a valve core assembly disposed inside the valve body. The screw plugs are screwed into the valve body via a threaded connection, and their main function is to seal the internal cavity of the valve body and fix internal components such as valve sleeves and springs. However, this threaded connection method has inherent defects. Because the working environment of bidirectional hydraulic locks (such as construction machinery) is often accompanied by continuous and severe vibration, under long-term vibration loads, slight relative rotation or slippage can easily occur between the threaded pairs, a phenomenon known as "thread loosening." Once the screw plugs loosen, the following serious consequences will occur: First, the preload of the screw plugs decreases, destroying the static seal between them and the valve body, leading to hydraulic oil leakage, affecting the normal operation of the system and polluting the environment; second, changes in the position of the screw plugs may cause changes in the preload of the internal valve core assembly, disrupting the opening and closing pressure characteristics of the hydraulic lock, causing the locking function to fail, and posing a serious safety hazard to equipment operation.

[0004] Therefore, how to effectively prevent the plug from loosening under vibration has become a technical problem that urgently needs to be solved to improve the reliability of two-way hydraulic locks. Utility Model Content

[0005] The present invention provides a highly stable bidirectional hydraulic lock to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A highly stable bidirectional hydraulic lock includes a valve body and screw plugs screwed to the two side walls of the valve body. The valve body has an anti-loosening mechanism on the side wall corresponding to each screw plug. The anti-loosening mechanism includes an anti-loosening ring movably disposed on the valve body. The inner diameter wall of the anti-loosening ring has a plurality of inwardly protruding locking blocks evenly arranged circumferentially. The outer diameter wall of the head of the screw plug has a corresponding locking groove for the locking blocks to engage. The valve body is also provided with a locking component for locking the anti-loosening ring in a position where the locking blocks and the locking grooves are engaged with each other.

[0008] Preferably, the anti-loosening mechanism further includes a telescopic rod assembly, one end of which is connected to the valve body and the other end is fixedly connected to the anti-loosening ring, for guiding the anti-loosening ring to move relative to the valve body.

[0009] Preferably, the telescopic rod assembly includes a first telescopic rod and a second telescopic rod. The first telescopic rod is screwed into a connecting hole opened in the side wall of the valve body, and the second telescopic rod is telescopically sleeved inside the first telescopic rod, with its free end fixedly connected to the anti-loosening ring.

[0010] Preferably, the locking assembly includes a fixing block fixedly disposed on the outer diameter wall of the anti-loosening ring, and the fixing block has a fixing groove; the locking assembly also includes a fixing plate fixedly disposed on the side wall of the valve body; when the anti-loosening ring moves to the point where the locking block engages with the locking groove, the fixing plate engages in the fixing groove, and the fixing block and the corresponding through hole on the fixing plate are axially aligned; the locking assembly also includes a locking pin that can be inserted into the aligned through hole.

[0011] Preferably, the cross-sectional shape of the card block and the card slot is rectangular, trapezoidal or triangular.

[0012] Preferably, the anti-loosening ring is an integral circular ring.

[0013] Beneficial effects

[0014] The beneficial effects of this utility model are as follows: By adding an anti-loosening mechanism between the valve body and the screw plug, the technical problem of easy loosening of traditional threaded connections under vibration is effectively solved. The anti-loosening ring engages with the groove on the head of the screw plug through circumferentially distributed locking blocks, forming a mechanical interlock that directly restricts the possible circumferential rotation of the screw plug, fundamentally preventing loosening of the threaded pair due to vibration. Combined with a guideable telescopic rod assembly and a quick-fixing pin-type locking assembly, the accuracy and stability of the anti-loosening ring's engagement position are ensured, while also facilitating assembly and maintenance. This structure significantly improves the sealing reliability and locking function stability of the bidirectional hydraulic lock under long-term severe vibration conditions, effectively preventing hydraulic oil leakage and functional failure, ensuring equipment operation safety, and has the advantages of compact structure, reliable anti-loosening effect, and strong practicality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the valve body structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the anti-loosening ring structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the anti-loosening ring structure in the axial movement state of this utility model.

[0019] The correspondence between the labels and component names in the attached figures is as follows:

[0020] 1. Valve body; 11. Connection hole;

[0021] 2. Plug; 21. Slot;

[0022] 3. Anti-loosening ring; 31. Locking block

[0023] 41. First telescopic pole; 42. Second telescopic pole;

[0024] 5. Fixing block; 51. Fixing groove; 52. Through hole;

[0025] 6. Fixing plate; 61. Through hole;

[0026] 7. Card cancellation. Detailed Implementation

[0027] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0029] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] To avoid excessive and unnecessary details, well-known structures or functions will not be described in detail in the following embodiments.

[0031] like Figure 1-4 The diagram shown is a structural schematic of a highly stable bidirectional hydraulic lock according to a preferred embodiment of the present invention.

[0032] In this embodiment, the valve body 1 includes a valve body 1 and screw plugs 2 screwed to the two side walls of the valve body 1. The screw plugs 2 are used to seal the internal cavity of the valve body 1 and apply necessary pre-tightening force to the internal components. The valve body 1 is equipped with conventional valve cores, valve sleeves, and springs (not shown in the figure, which are known technologies). The valve body 1 is provided with an anti-loosening mechanism on the side wall corresponding to each screw plug 2. The anti-loosening mechanism includes an anti-loosening ring 3 movably disposed on the valve body 1. The inner diameter wall of the anti-loosening ring 3 is uniformly provided with a plurality of inwardly protruding locking blocks 31 along the circumferential direction. The outer diameter wall of the head of the screw plug 2 is provided with a corresponding locking groove 21 for the locking blocks 31 to be engaged. The valve body 1 is also provided with a locking component for locking the anti-loosening ring 3 in a position where the locking blocks 31 and the locking groove 21 are engaged with each other.

[0033] In this embodiment, the anti-loosening mechanism further includes a telescopic rod assembly. One end of the telescopic rod assembly is connected to the valve body 1, and the other end is fixedly connected to the anti-loosening ring 3, which is used to guide the anti-loosening ring 3 to move smoothly relative to the valve body 1 along the axial direction.

[0034] In this embodiment, the telescopic rod assembly includes a first telescopic rod 41 and a second telescopic rod 42. The first telescopic rod 41 is screwed into the connection hole 11 opened in the side wall of the valve body 1. The second telescopic rod 42 is telescopically sleeved in the first telescopic rod 41, and its free end is fixedly connected to the anti-loosening ring 3. This assembly is used to guide the anti-loosening ring 3 to move smoothly along the axial direction of the screw plug 2, ensuring that all locking blocks 31 can be synchronously and accurately locked into or disengaged from the locking groove 21.

[0035] In this embodiment, the locking assembly includes a fixing block 5 fixedly disposed on the outer diameter wall of the anti-loosening ring 3, and a fixing groove 51 is provided on the fixing block 5; the locking assembly also includes a fixing plate 6 fixedly disposed on the side wall of the valve body 1; when the anti-loosening ring 3 moves to the point where the locking block 31 engages with the locking groove 21, the fixing plate 6 engages in the fixing groove 51, and the fixing block 5 and the corresponding through holes 52, 61 on the fixing plate 6 are axially aligned; the locking assembly also includes a locking pin 7 that can be inserted into the aligned through holes 52, 61, the locking pin 7 being an R-shaped locking pin. When the anti-loosening ring 3 is pushed towards the screw plug 2, so that all the locking blocks 31 are fully engaged in the locking groove 21, the locking assembly is used to fix the anti-loosening ring 3 in this position to prevent it from accidentally retracting due to vibration.

[0036] In this embodiment, the cross-sectional shape of the card block 31 and the card slot 21 is preferably rectangular, which facilitates engagement and disengagement and produces a self-locking effect.

[0037] In this embodiment, the anti-loosening ring 3 is an integral circular ring, which has better structural strength and stability.

[0038] Working principle and installation process:

[0039] First, screw the plug 2 into the valve body 1 to the specified torque and tighten it. Then, place the anti-loosening ring 3 on the head of the plug 2. Guided by the first telescopic rod 41 and the second telescopic rod 42, the anti-loosening ring 3 can move freely and the locking block 31 can be aligned with the locking groove 21. Push the anti-loosening ring 3 axially so that the locking block 31 on it is fully embedded in the locking groove 21 of the plug 2. This action directly restricts the possible circumferential rotation of the plug 2 through mechanical interlocking. Finally, after the fixing plate 6 is inserted into the fixing groove 51 of the fixing block 5, insert the locking pin 7 into the through holes 52 and 61 to complete the fixing of all anti-loosening measures. When it is necessary to remove the plug 2, pull the locking pin 7 out of the through holes 52 and 61 to release the fixing of the fixing block 5 and the fixing plate 6. The anti-loosening ring 3 can then be moved axially to release the locking of the plug 2, and the plug 2 can be removed.

[0040] In summary, this embodiment employs a dual anti-loosening design, primarily using the mechanical engagement of the anti-loosening ring and secondarily using pin locking, which significantly improves the reliability of the bidirectional hydraulic lock under vibration conditions and effectively ensures the safe and stable operation of the equipment.

[0041] The technologies not described in detail in this utility model (such as the main valve core assembly in the valve body) are all known technologies, and those skilled in the art can easily implement this utility model based on their understanding of this specification.

[0042] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A highly stable bidirectional hydraulic lock, comprising a valve body (1) and screw plugs (2) screwed to both sides of the valve body (1), characterized in that: The valve body (1) is provided with an anti-loosening mechanism on the side wall corresponding to each of the screw plugs (2); The anti-loosening mechanism includes an anti-loosening ring (3) movably disposed on the valve body (1), and the inner diameter wall of the anti-loosening ring (3) is uniformly provided with a number of inwardly protruding locking blocks (31) along the circumferential direction; The screw plug (2) has a corresponding slot (21) on its outer diameter wall for the locking block (31) to be inserted into; the valve body (1) is also provided with a locking component for locking the anti-loosening ring (3) in a position where the locking block (31) and the slot (21) are engaged with each other.

2. The bidirectional hydraulic lock with high stability according to claim 1, characterized in that: The anti-loosening mechanism also includes a telescopic rod assembly, one end of which is connected to the valve body (1) and the other end is fixedly connected to the anti-loosening ring (3) to guide the anti-loosening ring (3) to move relative to the valve body (1).

3. The bidirectional hydraulic lock with high stability according to claim 2, characterized in that: The telescopic rod assembly includes a first telescopic rod (41) and a second telescopic rod (42). The first telescopic rod (41) is screwed into the connection hole (11) opened on the side wall of the valve body (1). The second telescopic rod (42) is telescopically sleeved inside the first telescopic rod (41), and its free end is fixedly connected to the anti-loosening ring (3).

4. The highly stable bidirectional hydraulic lock according to claim 1, characterized in that: The locking assembly includes a fixing block (5) fixedly disposed on the outer diameter wall of the anti-loosening ring (3), and the fixing block (5) is provided with a fixing groove (51); The locking assembly also includes a fixing plate (6) fixedly disposed on the side wall of the valve body (1); When the anti-loosening ring (3) moves to the point where the locking block (31) engages with the locking groove (21), the fixing plate (6) is inserted into the fixing groove (51), and the fixing block (5) and the corresponding through holes (52, 61) on the fixing plate (6) are axially aligned. The locking assembly also includes a latch (7) that can be inserted into the overlapping through holes (52, 61).

5. A highly stable bidirectional hydraulic lock according to any one of claims 1 to 4, characterized in that: The cross-sectional shape of the card block (31) and the card slot (21) is rectangular, trapezoidal or triangular.

6. A highly stable bidirectional hydraulic lock according to any one of claims 1 to 4, characterized in that: The anti-loosening ring (3) is an integral circular ring.

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