Connector structure for restraining threaded connection from loosening

Abstract

The utility model discloses a connector structure used for restraining threaded connection from loosening, which comprises a connector body, the end portion of the connector body is configured to be a threaded column with a penetrating through hole or a threaded hole formed in the axial direction, the connector body is located on the outer side of a connecting structure and coaxially sleeved with a spring washer, and the spring washer is an O-shaped annular elastic element with a fracture. Two ends of the fracture form a staggered structure with axial height difference; when the connector body is in threaded connection with the matching piece, the end face of the matching piece compresses the spring washer, the protruding part at least one end of the staggered structure abuts against the end face of the matching piece, circumferential rotation is restrained through elastic restoring force, and looseness prevention is achieved. Through the dislocation elastic deformation of the spring washer, the anti-vibration loosening performance is obviously improved, the structure is simple, and two connection modes of a threaded column / hole are adapted.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipe fitting connection technical field especially relates to a joint structure for inhibiting screw thread connection loosening. BACKGROUND

[0002] In the field of pipeline connection, fluid delivery and equipment assembly, threaded joints are widely used due to their detachability and sealing performance. However, traditional threaded joints are prone to loosening under vibration, impact or temperature change conditions, leading to sealing failure and even structural separation. This problem is particularly prominent in high-frequency vibration scenarios such as washing machine water inlet pipes and faucet connections. Existing anti-loosening joints rely on static pre-tightening force and cannot effectively resist the circumferential torque. Long-term use may lead to material creep or stress relaxation, resulting in degradation of anti-loosening performance. SUMMARY

[0003] The utility model discloses a joint structure for inhibiting screw thread connection loosening.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a joint structure for inhibiting screw thread connection loosening, comprising a joint body, the end of the joint body is configured as one of the following connection structures: a) a threaded column with a through hole, the outer diameter of the threaded column is smaller than the outer diameter of the joint body; b) a threaded hole opened axially; a spring washer is coaxially sleeved on the outside of the joint body at the connection structure, the spring washer is an annular elastic element with a broken O-shaped ring, and the broken ends form a misaligned structure with an axial height difference; when the connection structure is threadedly connected with a mating piece, the end face of the mating piece compresses the spring washer, so that at least one end of the misaligned structure protrudes and abuts against the end face of the mating piece, and the circumferential rotation of the mating piece is inhibited by the elastic restoring force of the spring washer.

[0005] As a preferred technical scheme of the utility model, at least one end of the protruding part at the broken end of the spring washer extends beyond the end face of the joint body in a free state, so that the protruding part contacts the end face of the mating piece first when threadedly connected.

[0006] As a preferred technical scheme of the utility model, the two end ports of the spring washer at the broken end do not overlap in axial projection.

[0007] As a preferred technical scheme of the utility model, the joint body is provided with an annular clamping groove on the side of the end face corresponding to the connection structure for restraining the axial displacement of the spring washer.

[0008] As a preferred technical scheme of the utility model, the spring washer and the annular clamping groove are interference fit.

[0009] As a preferred technical scheme of the utility model, when the connecting structure is a threaded column, the fitting part is provided with a threaded hole matched with the threaded column; when the connecting structure is a threaded hole, the fitting part is provided with a threaded column matched with the threaded hole.

[0010] Compared with the prior art, the utility model has the beneficial effects that the C-shaped fracture of the spring washer and the axial misalignment structure form an asymmetric contact area when compressed, the cooperative action mechanism of the axial pre-tightening force and the circumferential anti-loosening torque is established through the preferential contact and progressive compression of the spring washer fracture protruding part, the circumferential rotation of the threaded pair is actively inhibited, and the loosening caused by vibration and impact is effectively resisted. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the structural schematic diagram of the utility model embodiment one;

[0012] Figure 2 It is the structural schematic diagram of the utility model embodiment two;

[0013] Figure 3 It is the structural schematic diagram of the utility model embodiment three;

[0014] Figure 4 It is the structural schematic diagram of the joint body in the utility model embodiments one, two and three;

[0015] Figure 5 It is the structural schematic diagram of the spring washer in the utility model embodiments one, two and three.

[0016] The figure mark: 1, joint body;2, threaded column;3, spring washer;4, protruding part;5, annular clamping groove;6, fitting part;7, end face A;8, end face B. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor all belong to the protection scope of the utility model.

[0018] The specific embodiments of the utility model are described below in combination with the drawings.

[0019] As Figures 1 to 5A joint structure for inhibiting loosening of a threaded connection is shown, comprising a joint body 1, the end of the joint body 1 is configured as any one of the following connection structures: a) provided with a threaded column 2 with a through hole, the outer diameter of the threaded column 2 is smaller than the outer diameter of the joint body 1; b) an axially opened threaded hole (not shown in the figure); the joint body 1 is coaxially sleeved with a spring washer 3 on the outside of the connection structure, the spring washer 3 is an annular elastic element with an O-shaped broken part (or a C-shaped broken part structure), and the broken part has an axial height difference at both ends to form a misalignment structure; when the connection structure is threadedly connected with a mating piece 6, the end face of the mating piece 6 compresses the spring washer 3, so that at least one end of the misalignment structure protrudes 4 abuts against the end face of the mating piece 6, and the circumferential rotation of the mating piece 6 is inhibited by the elastic restoring force of the spring washer 3.

[0020] The C-shaped broken part of the spring washer 3 and the axial misalignment structure form an asymmetric contact area when compressed, and through the preferential contact and progressive compression of the protruding part 4 of the broken part of the spring washer 3, an axial pre-tightening force and a circumferential anti-loosening torque cooperation mechanism is established, which actively inhibits the circumferential rotation of the threaded pair and effectively resists loosening caused by vibration and impact. The present application uses the same joint body 1 to compatible threaded column 2 and threaded hole two connection structures, adapts to external thread or internal thread mating piece 6, without the need for customized design, significantly expanding the application scenarios.

[0021] The anti-loosening joint structure has wide application adaptability and is suitable for various fluid connection scenes: the mating piece 6 can be a pipe joint, a washing machine inlet / outlet joint, a faucet interface, etc. The pipe joint needs to bear dynamic load, especially suitable for washing machines, water purification equipment, bathroom hardware, etc. in high-frequency vibration or water impact environment; the joint body 1 material: according to the actual working condition requirements, such as Figure 3 As shown, the joint body 1 is connected to a hose (the hose joint can be made of metal or plastic), and the joint body 1 is preferably made of engineering plastic by injection molding (the material is selected according to the actual situation), which meets the lightweight and corrosion resistance requirements; as Figure 2 As shown, the joint body 1 is a metal joint, which can also be made of brass, stainless steel and other metal materials by machining, suitable for high pressure and high temperature environment; as Figure 1 As shown, for terminal equipment such as faucets, the anti-loosening function is integrated into the faucet body casting, forging, precision casting, welding and other different production process structures, or is fixed on the faucet body by thread connection or buckle and the like; the connection form is universal: whether it is an external threaded column 2 connection or an internal threaded hole connection, the structure can realize reliable anti-loosening through the elastic abutting mechanism of the spring washer 3, and is suitable for mainstream thread standards such as ISO, GB and DIN without changing the existing equipment interface design.

[0022] The at least one end protrusion 4 of the spring washer 3 at the breaking point extends beyond the end surface A7 of the joint body 1 in the free state, so that the protrusion 4 first contacts the end surface B8 of the fitting 6 when threaded, and the two end protrusions of the spring washer 3 at the breaking point do not overlap in the axial projection in the embodiment (an overlapping structure can also be provided, as long as the circumference exceeds a full circle).

[0023] The joint body 1 is provided with an annular clamping groove 5 on the side end surface corresponding to the connecting structure, which is used to constrain the axial displacement of the spring washer 3. In the embodiment, the spring washer 3 is in interference fit with the annular clamping groove 5, and the combination of the annular clamping groove 5 and the spring washer 3 realizes quick assembly without additional fasteners or complex processing, reduces production cost, and the interference fit design ensures that the washer is stably limited in the clamping groove in the non-compressed state, avoiding falling off during transportation or pre-assembly. It is not limited to the annular clamping groove 5 mentioned in the application, and a plurality of elastic clamping parts can also be arranged along the circumferential direction of the end surface, and the spring washer 3 can be embedded.

[0024] When the connecting structure is a threaded column 2, the fitting 6 is provided with a threaded hole matched with the threaded column 2; when the connecting structure is a threaded hole, the fitting 6 is provided with a threaded column 2 matched with the threaded hole.

[0025] The basic principle, main features and advantages of the utility model are shown and described above, and those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the utility model and do not limit the utility model. Without departing from the spirit and scope of the utility model, the utility model can also have various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model, and the scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A joint structure for inhibiting loosening of a threaded connection, comprising a joint body (1), the end of which is configured as one of the following connection structures: a) a threaded stud (2) provided with a through hole, the outer diameter of the threaded stud (2) being smaller than the outer diameter of the joint body (1); b) a threaded hole opened axially; characterized in that: The joint body (1) is coaxially sleeved with a spring washer (3) on the outside of the connecting structure, the spring washer (3) is an O-shaped ring elastic element with a broken part, and the two ends of the broken part form a misalignment structure with an axial height difference; when the connecting structure is threadedly connected with a mating piece (6), the end surface of the mating piece (6) compresses the spring washer (3), so that at least one end protrusion (4) of the misalignment structure abuts against the end surface of the mating piece (6), and the circumferential rotation of the mating piece (6) is inhibited by the elastic restoring force of the spring washer (3).

2. A joint structure for inhibiting loosening of a threaded connection according to claim 1, characterized in that: In the free state, at least one end protrusion (4) at the broken part of the spring washer (3) extends beyond the end surface of the joint body (1), so that the protrusion (4) first contacts the end surface of the mating piece (6) when threadedly connected.

3. A joint structure for inhibiting loosening of a threaded connection according to claim 2, characterized in that: The two end port portions at the broken part of the spring washer (3) do not overlap in axial projection.

4. A joint structure for inhibiting loosening of a threaded connection according to claim 1 or 2 or 3, characterized in that: The joint body (1) is provided with an annular clamping groove (5) on the side end surface corresponding to the connecting structure, which is used to constrain the axial displacement of the spring washer (3).

5. A joint structure for inhibiting loosening of a threaded connection according to claim 4, characterized in that: The spring washer (3) is interference-fitted with the annular clamping groove (5).

6. The joint structure for inhibiting loosening of a threaded connection according to claim 1, characterized by: When the connecting structure is a threaded column (2), the mating piece (6) is provided with a threaded hole matched with the threaded column (2); when the connecting structure is a threaded hole, the mating piece (6) is provided with a threaded column (2) matched with the threaded hole.

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