Flexible connection structure in reversing valve

Abstract

The flexible connecting structure in the reversing valve comprises a valve element and a connecting rod, a connecting hole is formed in one end of the valve element, a connector is arranged at one end of the connecting rod, the cross section area of the connector is larger than that of the connecting rod, a clamping structure used for clamping the connector is arranged on the side wall of the connecting hole, and after the connector is clamped by the clamping structure, the connector is clamped by the clamping structure. And a movable gap is formed between the connector and the connecting hole as well as the clamping structure. The connector is clamped in the connecting hole through the clamping structure, and the movable gap is formed between the connector and the connecting hole and between the connector and the clamping structure, so that after the connecting rod and the valve element are connected, a movable space is formed between the connecting rod and the valve element, and when the machining precision is not high, the connecting rod and the valve element can be automatically adjusted through the movable space; therefore, the connecting rod and the valve element can smoothly move in the valve body, and the connecting rod and the valve element are prevented from being stuck.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic valves, specifically a flexible connection structure within a directional valve. Background Technology

[0002] In existing directional control valves, the connecting rod and valve core are connected by threads, which is a rigid connection. This requires high machining and installation accuracy. If deviation occurs, the valve core or connecting rod may easily become stuck. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a flexible connection structure within a directional control valve, comprising a valve core and a connecting rod. One end of the valve core has a connection hole, and one end of the connecting rod has a connector. The cross-sectional area of ​​the connector is larger than that of the connecting rod. A snap-fit ​​structure for locking the connector is provided on the side wall of the connection hole. After the snap-fit ​​structure locks the connector, an movable gap is provided between the connector, the connection hole, and the snap-fit ​​structure.

[0004] Preferably, the snap-fit ​​structure includes a snap ring and a slot formed on the side wall of the connection hole. The snap ring is installed in the slot and partially protrudes from the slot. After the connector enters the connection hole, the snap ring locks the connector and connects the connecting rod to the valve core.

[0005] Preferably, the top of the connecting hole is chamfered.

[0006] Preferably, at the transition between the connector and the connecting rod, the joint gradually tapers inward from the connector to the connecting rod, forming a slope.

[0007] Preferably, the cross-section of the retaining ring is circular, rhomboid, or trapezoidal.

[0008] Preferably, the bottom of the connecting hole is provided with a first rounded corner, and the connector head is provided with a second rounded corner.

[0009] The beneficial effects of this utility model are as follows: the connector is snapped into the connection hole by the snap-fit ​​structure, and an movable gap is set between the connector, the connection hole and the snap-fit ​​structure, so that there is room for movement between the connector rod and the valve core after they are connected. In the case of low machining accuracy, the connector rod and the valve core can adjust themselves through the movable space, so that the connector rod and the valve core can move smoothly in the valve body and avoid the connector rod and the valve core being stuck. Attached Figure Description

[0010] Figure 1 This is an overall structural diagram of the present invention;

[0011] Figure 2 for Figure 1 A magnified view of the marked area. Detailed Implementation

[0012] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0013] Please see Figure 1-Figure 2 This utility model provides a flexible connection structure inside a reversing valve, including a valve core 1 and a connecting rod 2. One end of the valve core 1 is provided with a connection hole 3, and one end of the connecting rod 2 is provided with a connector 4. The cross-sectional area of ​​the connector 4 is larger than that of the connecting rod 2. A snap-fit ​​structure for locking the connector 4 is provided on the side wall of the connection hole 3. After the snap-fit ​​structure locks the connector 4, an movable gap is provided between the connector 4, the connection hole 3, and the snap-fit ​​structure.

[0014] The connector 4 is snapped into the connecting hole 3 by a snap-fit ​​structure. An adjustable gap is provided between the connector 4, the connecting hole 3, and the snap-fit ​​structure, so that there is room for movement between the connecting rod 2 and the valve core 1 after they are connected. In the event of low machining accuracy, the connecting rod 2 and the valve core 1 can adjust themselves through the adjustable space, so that the connecting rod 2 and the valve core 1 can move smoothly in the valve body and avoid the connecting rod 2 and the valve core 1 from being stuck.

[0015] Furthermore, the snap-fit ​​structure includes a retaining ring 5 and a retaining groove 6 formed on the side wall of the connecting hole 3. The retaining ring 5 is installed in the retaining groove 6 and partially protrudes from the retaining groove 6. After the connector 4 enters the connecting hole 3, the retaining ring 5 locks the connector 4, connecting the connecting rod 2 to the valve core 1. Alternatively, a retaining spring can be installed in the retaining groove 6 to lock the connector 4.

[0016] During installation, first insert the connector 4 into the connecting hole 3, then press the retaining ring 5 into the connecting hole 3 using a pressing device until the retaining ring 5 reaches the retaining groove 6 and is engaged within it, thus securing the connector 4 within the connecting hole 3. Using the retaining ring 5 to hold the connector 4 in place is a simple and easy-to-manufacture structure, and the retaining ring 5 provides more even and comprehensive positioning of the connector 4. In contrast, a retaining spring may have a notch at a certain position, causing a significant deviation in the engagement structure at a specific location, affecting the normal movement of the valve core 1 and the connecting rod 2.

[0017] Furthermore, the top of the connecting hole 3 is provided with a chamfer 7. During installation, the chamfer 7 guides the retaining ring 5 to gradually deform, making the deformation of the retaining ring 5 controllable and facilitating the installation of the retaining ring 5. It can also effectively shorten the deformation stroke of the retaining ring 5, reduce damage to the retaining ring 5 during the installation process, and improve the stability of the retaining ring 5 after installation.

[0018] Furthermore, at the transition between connector 4 and connecting rod 2, the joint gradually narrows inward from connector 4 to connecting rod 2, forming a slope 9. This avoids stress concentration at the transition between connector 4 and connecting rod 2 and improves the service life of connecting rod 2.

[0019] Furthermore, the cross-section of the retaining ring 5 is circular, rhomboid, or trapezoidal.

[0020] Furthermore, the bottom of the connecting hole 3 is provided with a first rounded corner 10, and the connector 4 is provided with a second rounded corner 11 to avoid stress concentration and extend the service life of the connector 4.

[0021] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A flexible connection structure within a directional control valve, characterized in that: The device includes a valve core (1) and a connecting rod (2). One end of the valve core (1) is provided with a connecting hole (3), and one end of the connecting rod (2) is provided with a connector (4). The cross-sectional area of ​​the connector (4) is larger than that of the connecting rod (2). A snap-fit ​​structure for locking the connector (4) is provided on the side wall of the connecting hole (3). After the snap-fit ​​structure locks the connector (4), there is an active gap between the connector (4), the connecting hole (3), and the snap-fit ​​structure.

2. The flexible connection structure within a reversing valve according to claim 1, characterized in that: The snap-fit ​​structure includes a snap ring (5) and a snap groove (6) on the side wall of the connection hole (3). The snap ring (5) is installed in the snap groove (6) and partially protrudes from the snap groove (6). After the connector (4) enters the connection hole (3), the snap ring (5) snaps the connector (4) and connects the connecting rod (2) to the valve core (1).

3. The flexible connection structure within a reversing valve according to claim 1, characterized in that: The top of the connecting hole (3) is provided with a chamfer (7).

4. The flexible connection structure within a reversing valve according to claim 1, characterized in that: At the transition point between the connector (4) and the connecting rod (2), the joint gradually narrows inward from the connector (4) to the connecting rod (2), forming an inclined surface (9).

5. The flexible connection structure within a reversing valve according to claim 2, characterized in that: The cross-section of the retaining ring (5) is circular, rhomboid, or trapezoidal.

6. The flexible connection structure within a reversing valve according to claim 1, characterized in that: The bottom of the connecting hole (3) is provided with a first rounded corner (10), and the connector (4) is provided with a second rounded corner (11).

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