Inverted cone crush lock nut

Abstract

The application provides an inverted conical flattening check nut, relates to the technical field of fasteners, and comprises a screw rod body, a hexagonal stud type structure at the upper end of the screw rod body, a thread formed at the outer end face of the lower end of the screw rod body, a first nut, a hexagonal stud type structure of the main body of the first nut, and a first thread hole in the penetrating type formed at the middle position of the surface of the first nut. In the application, the outer end face of the first nut is uniformly provided with a friction strip. When a worker rotates the first nut by using a wrench, the friction strip can reduce the wear degree of the first nut by the wrench. When the second nut is completely screwed into the screw rod body, the second nut is expanded, a gradually increasing force is formed, and the second nut can be tightly held on the screw rod body. The application solves the problems that the nut is prone to loosening under vibration, the outer end face of the nut is prone to wear when the worker repeatedly rotates the nut by using a wrench, and the service life of the nut is reduced.

Description

Technical Field

[0001] This invention relates to the field of fastener technology, and particularly to a tapered flattened anti-loosening nut. Background Technology

[0002] Nuts and screws are common fasteners in the machining industry. However, under vibration conditions, ordinary nuts will loosen, resulting in a reduction in the fastening effect. Therefore, it is necessary to improve the nuts to enhance their vibration resistance.

[0003] Referring to patent CN202110758386.2, a lock-lock nut is provided, comprising: a nut body, a limiting pin, and a sphere; the nut body has a threaded hole and orthogonally arranged axial through holes and radial through holes, the axial through holes for installing the limiting pin, and the radial through holes communicating with the threaded hole for installing the sphere; the diameter of the radial through holes is larger than the diameter of the sphere, the diameter of the sphere is larger than the maximum diameter of the limiting pin, and larger than the distance from the inner side of the radial through holes to the bottom of the thread groove in the threaded hole; the diameter of the axial through holes is the same as the maximum diameter of the limiting pin; when the limiting pin is pressed into the first position in the axial through holes, the screw and the nut body are tightened; when the limiting pin is pressed into the second position in the axial through holes, the compression on the screw is released. This invention not only locks the nut and prevents it from loosening, but also allows for convenient removal as needed.

[0004] Based on the above patent search and combined with the current usage of nuts, it was found that there are still some shortcomings in the use of current nuts. For example, nuts are prone to loosening under vibration. Although the problem of loosening can be solved by using pins or adding anti-rotation locking plates, it is not convenient to remove and reuse them. In addition, when workers repeatedly tighten the nuts with a wrench, the outer end face of the nut is easily worn, which reduces the service life of the nut. Summary of the Invention

[0005] In view of this, the present invention provides a tapered flattened anti-loosening nut. The first nut has friction strips evenly installed on its outer end face, so that when the worker turns the first nut with a wrench or other tools, the friction strips can reduce the wear of the first nut by the wrench. The second nut has a tapered design, the cross-section of the second threaded hole is elliptical, and the minor axis of the second threaded hole is smaller than the outer diameter of the screw body. When the second nut is fully screwed into the screw body, the second nut is opened up, forming a gradually increasing force. The second nut can tightly hold the screw body, thereby achieving a very good anti-loosening effect.

[0006] This invention provides the purpose and effect of a tapered flattened anti-loosening nut, specifically including: a screw body; The upper end of the screw body is divided into a hexagonal stud structure, and the lower end of the screw body has threads on its outer end face; The first nut has a hexagonal stud structure as its main body, and a through-hole is provided in the middle of the surface of the first nut. The second nut is fixedly installed on the outer end face of the first nut, and a through-hole is provided on the surface of the second nut. The fixing tube is fixedly installed at the middle position of the upper end face of the first nut; the fixing strip is a long strip structure, which is snapped into the groove on the outer end face of the screw body, and a device groove is opened above the outer end face of the fixing strip, and a T-shaped track groove is opened at the left and right ends of the device groove; the locking block has an inclined outer end face and a horizontal inner end.

[0007] Furthermore, a friction strip is fixedly installed on the outer end face of the first nut, and four friction strips are installed on each of the six outer end faces of the first nut. The outer end face of the friction strip has an arc-shaped structure.

[0008] Furthermore, the cross-section of the first threaded hole is circular, and the cross-section of the second threaded hole is elliptical.

[0009] Furthermore, the minor axis of the cross-section of the second threaded hole is smaller than the radius of the first threaded hole, and the major axis of the cross-section of the second threaded hole is larger than the radius of the second threaded hole.

[0010] Furthermore, the upper end of the second nut is a tapered structure, and the lower end of the second nut is an elliptical cylindrical structure.

[0011] Furthermore, two symmetrically spaced square holes are provided on the surface of the fixing tube. When the screw body is engaged inside the fixing tube, the outer end face of the screw body fits against the inner wall of the fixing tube.

[0012] Furthermore, a T-shaped limiting block is installed at each of the left and right ends of the card block, and the limiting block is slidably locked inside the track grooves at the left and right ends of the device slot.

[0013] Furthermore, a compression spring is fixedly installed on the inner end face of the card block. The front end of the compression spring is fixedly connected to the card block, and the rear end of the compression spring is fixedly connected to the bottom end face of the device groove.

[0014] This invention provides a tapered, flattened, anti-loosening nut, which has the following advantages: In this invention, the main body of the first nut is a hexagonal stud structure. By uniformly installing friction strips on the outer end face of the first nut, when the worker rotates the first nut with tools such as wrenches, the friction strips can reduce the wear of the first nut by the wrench. After the first nut is repeatedly turned, the outer end face of the first nut will not deform.

[0015] In addition, the second nut has an inverted conical design. When the screw body is screwed into the inverted conical part of the second nut, the pressure at the smallest part of the inverted conical part is relatively small. As the second nut is screwed in, it will gradually expand, forming a force that gradually increases. When the second nut is fully screwed in, the force on the screw body is more even, and the thread damage is less. The second nut can hold tightly to the screw body, thus achieving a very good anti-loosening effect.

[0016] In addition, regarding disassembly and reuse, when the nut needs to be disassembled, it can be done with just an ordinary wrench, which is convenient for workers. At the same time, when the nut is reused, a tool can be used to flatten the second nut again, which can further improve the anti-loosening effect of the nut and achieve reuse.

[0017] In addition, by setting the fixing strip to be engaged in the groove on the outer end face of the screw body, when the fixing strip moves upward to the position of the limiting square hole on the surface of the fixing tube, the locking block will be engaged in the limiting square hole on the surface of the fixing tube under the action of the compression spring, which can play a limiting role for the fixing tube, so that the first nut and the second nut will not loosen when encountering vibration. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0019] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0020] In the attached diagram: Figure 1 This is a schematic diagram of the overall device structure of the present invention; Figure 2 This is a schematic diagram of the screw body structure of the present invention. Figure 3 This is a schematic diagram of the structure of the first nut, the second nut, and the fixing tube of the present invention; Figure 4 This is a cross-sectional view of the first nut and the second nut of the present invention; Figure 5 This is a top view schematic diagram of the second nut structure of the present invention; Figure 6 This is a schematic diagram of the screw body and fixing strip structure of the present invention; Figure 7 This is the present invention. Figure 6 A magnified view of the structure at point A in the middle; Figure 8 This is a schematic diagram of the connection structure between the fixing strip and the card block of the present invention; Figure 9 This is a schematic diagram of the connection structure between the first nut, the friction strip, and the second nut of the present invention; Figure 10 This is a cross-sectional view of the second nut of the present invention. List of reference numerals in the attached diagram: 1. Screw body; 101. Slot; 2. First nut; 201. Friction strip; 202. First threaded hole; 3. Second nut; 301. Second threaded hole; 4. Fixing tube; 401. Limiting square hole; 5. Fixing strip; 501. Device groove; 502. Track groove; 6. Locking block; 601. Limiting block; 602. Compression spring. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present invention.

[0022] Example 1: Please refer to Figures 1 to 10 As shown: This invention provides a tapered flattened anti-loosening nut, comprising a screw body 1; The upper end of the screw body 1 is divided into a hexagonal stud structure, and the lower end of the screw body 1 has threads on its outer end face; The first nut 2 has a hexagonal stud structure as its main body, and a through-hole 202 is provided in the middle of the surface of the first nut 2. The second nut 3 is fixedly installed on the outer end face of the first nut 2. The surface of the second nut 3 has a through-hole second threaded hole 301. The fixing tube 4 is fixedly installed in the middle position of the upper end face of the first nut 2. The fixing strip 5 has a long strip structure and is snapped into the slot 101 on the outer end face of the screw body 1. A device slot 501 is opened above the outer end face of the fixing strip 5. A T-shaped track slot 502 is opened at the left and right ends of the device slot 501. The locking block 6 has an inclined outer end face and a horizontal inner end.

[0023] The first nut 2 has a friction strip 201 fixedly installed on its outer end face. Four friction strips 201 are installed on each of the six outer end faces of the first nut 2. The outer end face of the friction strip 201 is arc-shaped. In use, the main body of the first nut 2 is a hexagonal stud structure. With the friction strips 201 evenly installed on the outer end face of the first nut 2, when the worker rotates the first nut 2 with tools such as a wrench, the friction strips 201 can reduce the wear of the wrench on the first nut 2, so that the outer end face of the first nut 2 will not deform after the first nut 2 is repeatedly turned.

[0024] The first threaded hole 202 has a circular cross-section, while the second threaded hole 301 has an elliptical cross-section. The minor axis of the second threaded hole 301 is smaller than the radius of the first threaded hole 202, and the major axis of the second threaded hole 301 is larger than the radius of the second threaded hole 301. During processing, the upper part of the second nut 3 can be machined into an inverted cone shape. At this time, the second threaded hole 301 on the inner end face of the second nut 3 has the same thread as the first threaded hole 202 inside the first nut 2. Then, the inverted cone part is flattened using equipment or tools to form an elliptical shape. The minor axis of the elliptical part inside the second nut 3 is smaller than that of the screw body 1. After the inverted cone part of the second nut 3 is flattened, the second nut 3 is then heat-treated to increase its hardness and make it more elastic.

[0025] The upper end of the second nut 3 is a conical structure, and the lower end of the second nut 3 is an elliptical cylindrical structure. The second nut 3 has an inverted conical design. When the screw body 1 is screwed into the inverted conical part of the second nut 3, the minimum pressure of the inverted conical part is relatively small. As the second nut 3 is screwed in, it will gradually expand, forming a force that gradually increases. When the second nut 3 is fully screwed in, the force on the screw body 1 is more even, and the thread damage is less. The second nut 3 can tightly hold the screw body 1, thereby achieving a very good anti-loosening effect.

[0026] Two limiting square holes 401 are symmetrically opened on the surface of the fixed tube 4. When the screw body 1 is inserted into the fixed tube 4, the outer end face of the screw body 1 is in contact with the inner wall of the fixed tube 4. A T-shaped limiting block 601 is installed at each of the left and right ends of the locking block 6. The limiting block 601 is slidably locked in the track groove 502 at the left and right ends of the device groove 501. A compression spring 602 is fixedly installed on the inner end face of the locking block 6. The front end of the compression spring 602 is fixedly connected to the locking block 6, and the rear end of the compression spring 602 is fixedly connected to the bottom end face of the device groove 501.

[0027] The technical effect achieved by adopting the above scheme is as follows: the first nut 2 and the second nut 3 cooperate with each other. When the first nut 2 and the second nut 3 are sleeved on the outside of the screw body 1, the limiting square hole 401 on the surface of the fixing tube 4 can be aligned with the slot 101 on the outer end of the screw body 1. At this time, the worker can clamp the fixing strip 5 into the slot 101 on the outer end face of the screw body 1, and then slide the fixing strip 5 upward. The outer end face of the clamping block 6 has an inclined structure. When the clamping block 6 passes through the second threaded hole 301 and the first threaded hole 202, the clamping block 6 will be squeezed into the device groove 501 on the surface of the fixing strip 5 under the pressure of the inner walls of the first nut 2 and the second nut 3. When the clamping block 6 moves to the fixing... When the clamping block 6 is inside the limiting square hole 401 on the surface of the tube 4, under the action of the compression spring 602, the clamping block 6 will move outward and engage in the limiting square hole 401 on the surface of the fixed tube 4, which can play a limiting role in fixing the tube 4. This will cause the first nut 2 and the second nut 3 to loosen when encountering vibration. When disassembling the first nut 2 and the second nut 3, the fixing strip 5 can be pushed upward. Since the outer end face of the fixing strip 5 is set with an inclined structure, the clamping block 6 will be squeezed back into the device groove 501, thereby causing the clamping block 6 to lose its limiting role in fixing the tube 4, making it easier for workers to disassemble the first nut 2 and the second nut 3.

[0028] Example 2: This invention provides a tapered, flattened, anti-loosening nut, based on Example 1, such as... Figures 1-10 As shown, it also includes: four friction strips 201 are respectively installed on the six outer end faces of the first nut 2. In practical applications, the worker can increase the number of friction strips 201 according to the size of the first nut 2, so that when the worker repeatedly turns the first nut 2, the friction strips 201 can reduce the degree of friction on the first nut 2.

[0029] The specific usage and function of this embodiment: In this invention, the first nut 2 has a hexagonal stud structure. Friction strips 201 are evenly installed on the outer end face of the first nut 2. When the worker rotates the first nut 2 with a wrench or other tools, the friction strips 201 can reduce the wear of the wrench on the first nut 2, so that the outer end face of the first nut 2 will not deform after repeated tightening. When installing this nut, the first nut 2 can be screwed normally onto the outside of the screw body 1 by hand. When the second nut 3 is screwed onto the outside of the screw body 1, since the inner diameter of the second threaded hole 301 on the surface of the second nut 3 is smaller than the diameter of the screw body 1, it is necessary to use a... Tools or equipment are needed to fully screw the nut in. The second nut 3 has a tapered design. When the screw body 1 is screwed into the tapered part of the second nut 3, the minimum pressure of the tapered part is relatively small. As the second nut 3 is screwed in, it gradually expands, forming a gradually increasing force. When the second nut 3 is fully screwed in, the force on the screw body 1 is more even, resulting in less thread damage. The second nut 3 can tightly grip the screw body 1, thus achieving a very good anti-loosening effect. During processing, the upper part of the second nut 3 can be machined into a tapered shape. At this time, the second threaded hole 301 on the inner end face of the second nut 3 and the inner thread of the first nut 2... The first threaded hole 202 has the same thread. Then, using equipment or tools, the upper tapered part is flattened to form an ellipse. The minor diameter of the elliptical part inside the second nut 3 is smaller than that of the screw body 1. After the tapered part of the second nut 3 is flattened, the second nut 3 is heat-treated to increase its hardness and make it more elastic. The first nut 2 and the second nut 3 cooperate with each other. When the first nut 2 and the second nut 3 are fitted onto the outside of the screw body 1, the limiting square hole 401 on the surface of the fixing tube 4 can be aligned with the groove 101 on the outer end of the screw body 1. At this time, the worker can clamp the fixing strip 5 into the groove 101 on the outer end face of the screw body 1. Then, the fixing strip 5 is slid upward. The outer end face of the locking block 6 is inclined. When the locking block 6 passes through the second threaded hole 301 and the first threaded hole 202, it will be pressed into the device groove 501 on the surface of the fixing strip 5 under the pressure of the inner walls of the first nut 2 and the second nut 3. When the locking block 6 moves into the limiting square hole 401 on the surface of the fixing tube 4, the locking block 6 will move outward under the action of the compression spring 602. The locking block 6 will be locked in the limiting square hole 401 on the surface of the fixing tube 4, which can play a limiting role for the fixing tube 4, so that the first nut 2 and the second nut 3 will not loosen when encountering vibration.

Claims

1. A tapered, flattened, anti-loosening nut, characterized in that, include: The screw body (1) has a hexagonal stud structure at its upper end and a thread on the outer end face of the lower part of the screw body (1). Two slots (101) are symmetrically opened on the outside of the screw body (1). The first nut (2) has a hexagonal stud structure as its main body and a through-hole (202) is opened in the middle of the surface of the first nut (2). The first threaded hole (202) has a circular cross-section; the second nut (3) is fixedly installed on the outer end face of the first nut (2), and the surface of the second nut (3) has a through-hole (301). The cross-section of the second threaded hole (301) is elliptical. The minor axis of the cross-section of the second threaded hole (301) is smaller than the radius of the first threaded hole (202), and the major axis of the cross-section of the second threaded hole (301) is larger than the radius of the second threaded hole (301); the upper end of the second nut (3) is tapered, and the lower end of the second nut (3) is elliptical cylindrical; the fixed tube (4 The fixing tube (4) is fixedly installed at the middle position of the upper end face of the first nut (2). Two limiting square holes (401) are symmetrically opened on the surface of the fixing tube (4); the fixing strip (5) is a long strip structure. The fixing strip (5) is snapped into the slot (101) on the outer end face of the screw body (1). A device slot (501) is opened above the outer end face of the fixing strip (5). A T-shaped track slot (502) is opened at the left and right ends of the device slot (501); the locking block (6) has an inclined structure on the outer end face and a horizontal structure on one side of the inner end face. A T-shaped limiting block (601) is installed at each of the left and right ends of the locking block (6). The limiting block (601) is slidably locked inside the track groove (502) at the left and right ends of the device groove (501). A compression spring (602) is fixedly installed on the inner end face of the locking block (6). The front end of the compression spring (602) is fixedly connected to the locking block (6), and the rear end of the compression spring (602) is fixedly connected to the bottom end face of the device groove (501). When the screw body (1) is locked inside the fixed tube (4), the outer end face of the screw body (1) is in contact with the inner wall of the fixed tube (4), and the locking block (6) is locked inside the limiting square hole (401).

2. The inverted conical flattened anti-loosening nut as described in claim 1, characterized in that: The outer end face of the first nut (2) is fixedly installed with a friction strip (201). Four friction strips (201) are installed on the six outer end faces of the first nut (2). The outer end face of the friction strip (201) is an arc-shaped structure.

Images