Stud bolt firm in connection

Abstract

The utility model discloses a firm connection stud, and relates to the technical field of hardware workpieces, the firm connection stud comprises a stud main body and a limiting ring, the surfaces of the left end and the right end of the stud main body are both provided with limiting grooves, and the left end and the right end of the stud main body are both provided with nut structures; the limiting ring is installed on the side, away from the vertical central axis of the stud body, of the nut structure. According to the stud bolt firm in connection, the conical needle is arranged in the butt joint insertion hole, and meanwhile the limiting grooves are formed in the surfaces of the two ends of the stud bolt body, so that after the nut structure is screwed in place, the limiting rings slide along the surfaces of the limiting grooves through the guide blocks and are inserted into the nut structure. When the expansion nail is horizontally inserted into the butt joint insertion hole, the conical needle can be horizontally inserted into the expansion nail, one end of the expansion nail is expanded, and therefore the limiting ring and the nut structure are in tight butt joint, and structural looseness of the nut structure can be avoided to the maximum extent.

Description

Technical Field

[0001] The utility model relates to the technical field of hardware workpieces, in particular to a stud bolt with firm connection. Background Art

[0002] A stud bolt, also known as a double-ended screw or stud, is a special fastener used primarily for mechanical connections. It has threads on both ends, but the middle section is usually a plain rod with no threads. This design allows stud bolts to be used to connect thick-walled components or when tightening from both ends simultaneously.

[0003] Stud bolts feature continuous, spiral, raised threads of a specific cross-section on both ends of a cylindrical or conical bolt. These threads connect the bolt and nut, ensuring a secure connection. Stud bolts are widely used in mining machinery, bridges, automobiles, motorcycles, boiler steel structures, crane towers, long-span steel structures, and large buildings. Because they have threads on both ends, they are particularly suitable for applications requiring simultaneous tightening from both ends.

[0004] Conventional stud bolts use a threaded connection between a nut and a screw rod, and are used in conjunction with washers to connect and secure structural members. However, the nut and the screw rod may become loose when subjected to vibration, thereby affecting the firmness of the connection.

[0005] Therefore, in view of this, the existing structure and defects are studied and improved, and a stud bolt with a firm connection is proposed. Utility Model Content

[0006] The purpose of the utility model is to provide a stud bolt with a firm connection, so as to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a stud bolt with a firm connection, comprising a stud bolt body and a limiting ring, wherein limiting grooves are provided on the left and right end surfaces of the stud bolt body, and nut structures are installed on the left and right ends of the stud bolt body, and the limiting ring is installed on the side of the nut structure away from the vertical central axis of the stud bolt body, and the limiting ring comprises a main ring body, a guide block and an expansion nail, the inner diameter surface of the main ring body is connected to the guide block, and the surface of the side of the main ring body close to the nut structure is horizontally connected to the expansion nail.

[0008] Furthermore, the limiting grooves are arranged in a circular array with the stud bolt body as the center, and three groups of limiting grooves are respectively provided at the left and right ends of the stud bolt body.

[0009] Furthermore, the nut structure includes a nut body, a docking socket and a tapered needle. A docking socket is provided on the surface of one side of the nut body close to the limiting ring, and a tapered needle is horizontally arranged in the middle of the docking socket.

[0010] Furthermore, the docking sockets and tapered needles are arranged in six groups in a circular array with the nut body as the center, and the tapered needles are welded in the middle of the docking sockets.

[0011] Furthermore, the guide blocks are provided in three groups in a circular array with the main ring body as the center, and the guide blocks are embedded in the limiting grooves and are slidably connected to each other.

[0012] Furthermore, the expansion nails are arranged in six groups in a circular array with the main ring body as the center, and the outer surface size of the expansion nails matches the inner surface size of the docking socket.

[0013] Furthermore, a cross-shaped slot structure is provided at one end of the expansion nail away from the main ring body, and the expansion nail is horizontally inserted into the middle of the interior of the expansion nail away from the main ring body.

[0014] Furthermore, a spring washer is provided on a side of the nut structure away from the limiting ring, and an annular gasket is provided on a side of the spring washer away from the nut structure.

[0015] The utility model provides a stud bolt with a firm connection, which has the following beneficial effects:

[0016] 1. The present invention provides three sets of limiting grooves in an annular array on each end surface of the stud bolt body. The main ring body, utilizing the guide blocks provided on the inner wall, is horizontally displaced along the surface of the limiting grooves on one end surface of the stud bolt body to facilitate structural docking with the nut structure. Simultaneously, the guide blocks slide into the interior of the limiting grooves to provide a structural locking function after the limiting ring and nut structure are docked, thereby preventing the nut structure from loosening and rotating, thereby ensuring the secure connection between the nut structure and the stud bolt body to the equipment structure. In addition, a docking socket is provided on one side surface of the nut body. When the limiting ring and the nut structure are docked and installed, as the expansion nail on one side surface of the main ring body is horizontally inserted into the docking socket, the tapered needle inside the docking socket is horizontally inserted into the center of the cross-slot structure provided on one end of the expansion nail. The expansion nail itself is structurally expanded from the inside of the expansion nail by utilizing the interference fit structure and is tightly attached to the inner wall of the docking socket, thereby achieving a tightening function. This ensures the secure connection between the limiting ring and the nut structure, thereby minimizing the loosening of the nut structure.

[0017] 2. The utility model also provides a spring washer and an annular gasket on the side of the nut structure away from the limiting ring, wherein the spring washer is arranged between the nut structure and the annular gasket. Therefore, when the nut structure is tightened, structural extrusion will be generated on the spring washer. At the same time, due to the structural characteristics of the spring washer itself, when it is subjected to structural extrusion, it will push the nut structure on one side in the opposite direction, so that the nut structure threadedly connected to the stud bolt body can be tightly engaged with each other, thereby ensuring the tightness of the nut structure when screwed, and further avoiding the occurrence of structural looseness. The use of the annular gasket can not only assist the nut structure in structural extrusion of the spring washer, but also avoid the spring washer causing indentations on the workpiece surface due to extrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the side view of the main body of a stud bolt with a firmly connected structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of a bracket body with stud bolts firmly connected in the utility model;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of an arc-shaped cover with a firmly connected stud bolt according to the present invention;

[0021] Figure 4 This is a schematic diagram of the three-dimensional structure of an arc-shaped cover with firmly connected stud bolts in the utility model.

[0022] In the figure: 1. stud bolt body; 2. limiting groove; 3. nut structure; 301. nut body; 302. docking socket; 303. tapered needle; 4. limiting ring; 401. main ring body; 402. guide block; 403. expansion nail; 5. spring washer; 6. annular gasket. DETAILED DESCRIPTION

[0023] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] like Figures 1 to 4As shown, a stud bolt with a firm connection includes a stud bolt body 1 and a limiting ring 4. Limiting grooves 2 are provided on the left and right end surfaces of the stud bolt body 1, and nut structures 3 are installed on the left and right ends of the stud bolt body 1. The limiting ring 4 is installed on the side of the nut structure 3 away from the vertical central axis of the stud bolt body 1. The limiting ring 4 includes a main ring body 401, a guide block 402 and an expansion nail 403. The inner diameter surface of the main ring body 401 is connected with the guide block 402, and the side surface of the main ring body 401 close to the nut structure 3 is horizontally connected with the expansion nail 403. The guide blocks 402 are arranged in three groups in a circular array with the main ring body 401 as the center, and the guide blocks 402 are embedded in the inside of the limiting grooves 2 and are slidably connected to each other. The expansion nails 403 are arranged in a circular array with the main ring body 401 as the center. There are six groups, and the outer surface size of the expansion nail 403 matches the inner surface size of the docking socket 302. The expansion nail 403 is provided with a "cross"-shaped slot structure at one end away from the main ring body 401, and the expansion nail 403 is horizontally inserted in the middle of the interior of the expansion nail 403 away from the main ring body 401. When the limit ring 4 and the nut structure 3 are docked and installed, as the expansion nail 403 on one side of the main ring body 401 is horizontally inserted into the docking socket 302, the conical needle 303 inside the docking socket 302 will be horizontally inserted into the inner center of the cross slot structure opened at one end of the expansion nail 403, thereby utilizing the interference fit structure from the inside of the expansion nail 403 to cause the expansion nail 403 itself to expand structurally and fit tightly against the inner wall of the docking socket 302, thereby playing a tightening role.

[0025] like Figures 1 to 4 As shown, the limiting grooves 2 are arranged in an annular array with the stud bolt body 1 as the center, and the limiting grooves 2 are respectively provided with three groups at the left and right ends of the stud bolt body 1. The nut structure 3 includes a nut body 301, a docking socket 302 and a tapered needle 303. A docking socket 302 is provided on the side surface of the nut body 301 close to the limiting ring 4, and a tapered needle 303 is horizontally provided in the middle of the docking socket 302. The docking socket 302 and the tapered needle 303 are both arranged in an annular array with the nut body 301 as the center, and the tapered needle 303 is provided in six groups. The shaped pin 303 is welded to the middle of the docking socket 302, and a spring washer 5 is provided on the side of the nut structure 3 away from the limiting ring 4, and an annular gasket 6 is provided on the side of the spring washer 5 away from the nut structure 3. When the nut structure 3 is tightened, structural extrusion will be generated on the spring washer 5. At the same time, due to the structural characteristics of the spring washer 5 itself, when it is subjected to structural extrusion, it will push the nut structure 3 on one side in the opposite direction, so that the nut structure 3 threadedly connected to the stud bolt body 1 can be tightly engaged with each other.

[0026] In summary, if Figures 1 to 4As shown, when using the stud bolt with a strong connection, first, the structural member to be connected is penetrated by the stud bolt body 1, and then the annular gasket 6 and the spring washer 5 are sequentially sleeved on the left and right ends of the stud bolt body 1, and fit with the side surfaces of the structural member, and then the two sets of nut structures 3 are screwed on the two ends of the stud bolt body 1 respectively, and screwed and tightened, so that the spring washer 5 is squeezed between the nut structure 3 and the annular gasket 6, and the structural characteristics of the spring washer 5 are used to make the nut structure 3 and the stud bolt body 1 tightly engage;

[0027] Then, the limiting ring 4 is slid along the limiting groove 2 on the surface of the stud bolt body 1 using the guide block 402 on the inner diameter surface of the main ring body 401 until the limiting ring 4 is structurally docked with the nut structure 3. During this process, the expansion nail 403 on one side of the main ring body 401 is horizontally inserted into the docking hole 302 on the surface of one side of the nut body 301. At the same time, the conical needle 303 inside the docking hole 302 is horizontally inserted into one end of the expansion nail 403, and its structure is expanded so that the expansion nail 403 is tightly attached to the inner wall of the docking hole 302, thereby ensuring the firmness of the connection between the limiting ring 4 and the nut structure 3, and structurally limiting the nut structure 3 to prevent loosening.

[0028] The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.

Claims

1. A stud bolt with a secure connection, comprising a stud bolt body (1) and a limiting ring (4), characterized in that: Limiting grooves (2) are provided on both left and right end surfaces of the stud bolt body (1), and nut structures (3) are installed on both left and right ends of the stud bolt body (1). The limiting ring (4) is installed on a side of the nut structure (3) away from the vertical center axis of the stud bolt body (1). The limiting ring (4) comprises a main ring body (401), a guide block (402) and an expansion nail (403). The inner diameter surface of the main ring body (401) is connected to the guide block (402), and the expansion nail (403) is horizontally connected to the surface of the main ring body (401) on one side close to the nut structure (3).

2. A stud bolt with a secure connection according to claim 1, characterized in that: The limiting grooves (2) are arranged in a circular array with the stud bolt body (1) as the center, and three groups of limiting grooves (2) are respectively arranged at the left and right ends of the stud bolt body (1).

3. A stud bolt with a secure connection according to claim 1, characterized in that: The nut structure (3) comprises a nut body (301), a docking socket (302) and a tapered needle (303); the docking socket (302) is provided on a surface of one side of the nut body (301) close to the limiting ring (4), and the tapered needle (303) is horizontally arranged in the middle of the docking socket (302).

4. A stud bolt with a secure connection according to claim 3, characterized in that: The docking sockets (302) and the tapered needles (303) are both provided in six groups in a circular array with the nut body (301) as the center, and the tapered needles (303) are welded to the middle of the docking sockets (302).

5. A stud bolt with a secure connection according to claim 1, characterized in that: The guide blocks (402) are arranged in three groups in a ring array with the main ring body (401) as the center, and the guide blocks (402) are embedded in the interior of the limiting groove (2) and are slidably connected to each other.

6. A stud bolt with a secure connection according to claim 3, characterized in that: The expansion nails (403) are arranged in six groups in a circular array with the main ring body (401) as the center, and the outer surface size of the expansion nails (403) matches the inner surface size of the docking socket (302).

7. A stud bolt with a secure connection according to claim 1, characterized in that: One end of the expansion nail (403) away from the main ring body (401) is provided with a cross-shaped slot structure, and the expansion nail (403) is horizontally inserted into the middle of the expansion nail (403) away from the main ring body (401).

8. The stud bolt with a secure connection according to claim 1, characterized in that: A spring washer (5) is provided on the side of the nut structure (3) away from the limiting ring (4), and an annular gasket (6) is provided on the side of the spring washer (5) away from the nut structure (3).

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