Dish-shaped anti-loosening screw

Abstract

The utility model provides a dish-shaped anti-loosening screw which comprises a nut section, an anti-loosening section, a transition section and a threaded section from top to bottom, a dish-shaped anti-loosening ring is connected to the outer side of the anti-loosening section in a sleeved mode, and the short end of the dish-shaped anti-loosening ring is connected between the nut section and the transition section in a clamped mode. When the rod body is rotated, the long end of the anti-loosening ring can replace the nut section to make contact with the connecting surface of a connected piece, stress on the center shaft of the rod body is shared to the two sides of the long end of the anti-loosening ring, the long end of the anti-loosening ring can provide reverse resistance for the screw in the pressing state, the screw is prevented from reversely rotating and loosening under the vibration working condition, and the service life of the screw is prolonged. And the stable working capability of the screw under the vibration working condition is ensured.

Description

Technical Field

[0001] The utility model relates to a threaded connection piece, in particular to a dish-shaped anti-loosening screw. Background Art

[0002] Screws are common connecting parts in life, including a screw part and a nut part. They can fix two parts together through threaded connection. They are indispensable and important components in connection, fixation, support, transmission of force and torque, sealing, adjustment and positioning, as well as decorative protection. The tightness of the screw connection directly affects the operational stability of the product. Screws will cause workpiece fatigue after long-term use, resulting in a decrease in connection strength, especially in situations where there are vibration conditions, such as washing machines, vibrating plates, etc. Traditional screws will loosen during the continuous vibration process, resulting in a decrease in connection capacity. In order to solve the above technical problems, the prior art will set an annular gasket at the lower end of the nut to replace the contact between the nut and the connecting surface, and rely on the annular gasket to provide rotational resistance to the screw. The annular gasket can enhance the shockproof effect of the screw to a certain extent, but the enhancement effect is limited. Utility Model Content

[0003] To solve the above technical problems, the utility model provides a dish-shaped anti-loosening screw, comprising a shaft, along which a nut section, an anti-loosening section, a transition section, and a threaded section are sequentially provided from top to bottom; the anti-loosening section is located between the transition section and the nut section, an anti-loosening ring is provided on the outer circumference of the anti-loosening section B, and a lower limiting ring and an upper limiting ring are respectively provided at the circumferential connection positions of the transition section, the nut section, and the anti-loosening section to prevent the anti-loosening ring from separating from the anti-loosening section;

[0004] The anti-loosening ring is a disc-shaped structure with a short end located at the top and a long end located at the bottom. The radial dimension of the long end of the anti-loosening ring is larger than the cap, and the radial dimension of the short end is smaller than the radial dimension of the two sets of limit rings.

[0005] Furthermore, the lower limiting ring is formed by machining a circumferential groove edge on the top of the anti-loosening section.

[0006] Furthermore, the inclination angle from the short end to the long end is between 10-30°.

[0007] Furthermore, the long end of the anti-loosening ring extends outwardly to form a horizontally arranged supporting edge to increase the contact area with the connection position.

[0008] Furthermore, the anti-loosening ring is movably sleeved on the outer side of the anti-loosening section B.

[0009] Furthermore, the difference in radial dimensions between the short end of the anti-loosening ring and the anti-loosening section is no more than 1 mm.

[0010] Furthermore, the length of the short end of the anti-loosening ring is smaller than the axial length of the anti-loosening section B.

[0011] Furthermore, the transition section is transitionally connected to the thread section and the anti-loosening section, and the radial dimension of the anti-loosening section is larger than that of the thread end.

[0012] The utility model provides a disc-shaped anti-loosening screw, comprising a nut section, an anti-loosening section, a transition section, and a threaded section from top to bottom. A disc-shaped anti-loosening ring is sleeved on the outer side of the anti-loosening section, and the short end of the disc-shaped anti-loosening ring is clamped between the nut section and the transition section. When the shaft is rotated, the long end of the anti-loosening ring can replace the nut section to contact the connecting surface of the connected part. The outer arc design of the disc shape can effectively distribute the force on the central axis of the shaft to both sides of the long end of the anti-loosening ring. The long end of the anti-loosening ring can provide reverse resistance for the screw in the compressed state, preventing the screw from reversely loosening under vibration conditions, thereby ensuring the stable working ability of the screw under vibration conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural diagram of a dish-shaped anti-loosening screw of the utility model;

[0014] Figure 2 It is a structural diagram of the shaft;

[0015] Figure 3 This is the main view of the anti-loosening ring;

[0016] Figure 4 It is a schematic diagram of the three-dimensional structure of the anti-loosening ring.

[0017] Reference numerals: shaft 1, anti-loosening ring 2, upper limit ring 3, lower limit ring 4, short end 5, long end 6, supporting edge 7;

[0018] Nut section A, anti-loosening section B, transition section C, thread section D. DETAILED DESCRIPTION

[0019] like Figures 1 to 2 The dish-shaped anti-loosening screw shown is mainly used in vibration conditions of threaded connections, including a rod body 1, along which a nut section A, an anti-loosening section B, a transition section C, and a threaded section D are arranged in sequence from top to bottom. The threaded section D is located at the lower end of the rod body 1, and the outer surface of the threaded section D is provided with an external thread that matches the external mounting hole. The screw is screwed into the mounting hole, and the two components are fastened by threaded matching. The nut section A is located at the top of the rod body 1, which is the position with the largest radial dimension of the entire rod body 1, providing a rotation force point for the operator. The nut section A is hexagonal in shape and can be adapted to the hexagonal wrench commonly used in the prior art. The hexagonal wrench actively activates the nut section A, which saves effort.

[0020] The anti-loosening section B is located between the transition section C and the nut section A. The outer circumference of the anti-loosening section B is provided with Figure 3 and Figure 4 The illustrated anti-loosening ring 2 has a lower retaining ring 4 and an upper retaining ring 3 at the circumferential connection points between the transition section C, the nut section A, and the anti-loosening section B. The anti-loosening ring 2 is generally disc-shaped, with a short end 5 located at the top and a long end 6 located at the bottom. The long end 6 of the anti-loosening ring 2 has a radial dimension larger than the cap, while the short end 5 has a radial dimension smaller than the radial dimensions of the two sets of retaining rings, thereby confining the anti-loosening ring 2 between the two sets of retaining rings. The interior of the anti-loosening ring 2 is hollow. When a screw is installed in the mounting hole, the nut section A is rotated, driving the shaft 1 downward, and the long end 6 of the anti-loosening ring 2 contacts the connecting surface of the mounting hole.

[0021] In this embodiment, the upper limit ring 3 is formed at the bottom of the nut section A, and the anti-loosening section B is processed into a circumferential groove through a thread rolling process, so that the groove is close to the groove edge of the transition section C to form the above-mentioned lower limit ring 4.

[0022] In conventional technology, the nut segment A is in direct contact with the surface of the connection position. When the connection position vibrates, the nut segment A will rotate relative to the mounting hole, causing the connection position to loosen. However, the nut segment A of the present invention transmits the load to the connection position through the anti-loosening ring 2. The load is dispersed from the short end 5 to the long end 6 through the outer arc of the anti-loosening ring 2, sharing the pressing force between the center of the shaft 1 and the connection position. Therefore, a greater torque can be applied to the nut segment A, so that the long end 6 of the anti-loosening ring 2 is tightly attached to the surface of the connection position, increasing the stability of the screw connection. The inclination angle from the short end 5 to the long end 6 of the disc-shaped anti-loosening ring 2 is between 10-30°. Under the premise of ensuring the load distribution capacity on both sides of the long end 6, the radial dimension of the anti-loosening ring 2 is minimized. The long end 6 of the anti-loosening ring 2 extends outward to the horizontal support edge 7, which increases the contact area with the connection position, thereby increasing the circumferential friction resistance generated between the anti-loosening ring 2 and the connection position under compression.

[0023] The anti-loosening ring 2 is preferably movably mounted on the outside of the anti-loosening section B, so that the anti-loosening ring 2 can rotate relative to the anti-loosening section B instead of rotating with the shaft 1. After tightening the screws, the disc-shaped anti-loosening ring 2 will be pressed tightly against the surface of the connection position. When the connection position vibrates, the position of the pressed disc-shaped anti-loosening ring 2 will not change, thereby increasing the reaction force that needs to be overcome for the shaft 1 to rotate. In this embodiment, the difference in radial dimensions between the short end 5 of the anti-loosening ring 2 and the anti-loosening section B is no more than 1 mm, and the anti-loosening ring 2 can maintain a high degree of coaxiality with the shaft 1, thereby increasing the uniformity of load sharing on both sides of the long end 6 of the anti-loosening ring 2.

[0024] Furthermore, the length of the short end 5 of the anti-loosening ring 2 is preferably shorter than the axial length of the anti-loosening section B, so that the anti-loosening ring 2 can move freely in the axial direction within the anti-loosening section B, thereby facilitating the processing of the anti-loosening ring 2. During the tightening process of the shaft 1, the nut section A will gradually apply a gradually increasing thrust to the anti-loosening section B until the anti-loosening ring 2 is completely pressed against the surface of the connected product.

[0025] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A dish-shaped anti-loosening screw, characterized by: The invention comprises a rod body (1), wherein a nut section, an anti-loosening section, a transition section, and a threaded section are sequentially arranged along the rod body (1) from top to bottom; the anti-loosening section is located between the transition section and the nut section, an anti-loosening ring (2) is sleeved on the outer circumference of the anti-loosening section B, and a lower limiting ring (4) and an upper limiting ring (3) are respectively arranged at the circumferential connection positions of the transition section, the nut section, and the anti-loosening section to prevent the anti-loosening ring (2) from separating from the anti-loosening section; The anti-loosening ring (2) is a disc-shaped structure, having a short end (5) located at the top and a long end (6) located at the bottom. The radial dimension of the long end (6) of the anti-loosening ring (2) is larger than that of the cap, and the radial dimension of the short end (5) is smaller than that of the two sets of limit rings.

2. A dish-shaped anti-loosening screw according to claim 1, characterized in that: The lower limiting ring (4) is formed by machining a circumferential groove edge on the top of the anti-loosening section.

3. The disc-shaped anti-loosening screw according to claim 1, characterized in that: The inclination angle from the short end (5) to the long end (6) is between 10° and 30°.

4. The dish-shaped anti-loosening screw according to claim 1, characterized in that: The long end (6) of the anti-loosening ring (2) extends outwards to form a horizontal supporting edge (7) to increase the contact area with the connection position.

5. The dish-shaped anti-loosening screw according to claim 1, characterized in that: The anti-loosening ring (2) is movably sleeved on the outside of the anti-loosening section.

6. The dish-shaped anti-loosening screw according to claim 1, characterized in that: The difference in radial dimensions between the short end (5) of the anti-loosening ring (2) and the anti-loosening section is no greater than 1 mm.

7. The dish-shaped anti-loosening screw according to claim 1, characterized in that: The length of the short end (5) of the anti-loosening ring (2) is smaller than the axial length of the anti-loosening section.

8. The dish-shaped anti-loosening screw according to claim 1, characterized in that: The transition section is transitionally connected to the thread section and the anti-loosening section, and the radial dimension of the anti-loosening section is larger than that of the thread end.

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