Fixed flaring nut

Abstract

The utility model relates to the technical field of fasteners, and discloses a fixed flaring nut which comprises a nut body, one end of the nut body is a flaring portion, the other end of the nut body is a threaded portion, and a locking hook is arranged on the outer side of the threaded portion. According to the utility model, the nut can be prevented from moving axially and rotating circumferentially, other tools are not needed to fix the nut in the weighing process, and the installation efficiency and effect are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a fixed flared nut. Background Art

[0002] During the design, manufacture, transportation and maintenance of various mechanical equipment, threaded connectors are indispensable basic components. When one-sided connection needs to be achieved in a closed cavity or an unopened space inside the equipment, generally, the nut is directly welded to the base body that needs one-sided connection first, and then a bolt is used for connection. When the nut is directly welded to the base body, it is not conducive to the disassembly of damaged parts of the nut or the base body, and additional welding processes and costs are required. Moreover, the welding process will have an adverse impact on the base body, such as when bolts and nuts are used to fix the rotor or stator inside a gas turbine. Therefore, self-locking nuts have emerged. For example, a Chinese utility model patent with the patent number CN204610520U discloses a flared self-locking nut, which includes a nut body. At one end of the nut body, there is a necked and deformed self-locking section, and at the other end of the nut body, there is a flared riveting section.

[0003] The above patent has at least the following problems: First, the nut body can only prevent axial movement and cannot effectively prevent the nut body from rotating circumferentially. It can only rely on stamping and flaring extrusion and fixing with tools such as wrenches. Second, for products with limited space structures, there is no guarantee that the nut body has a wrenching space at some assembly positions. Relying solely on stamping and flaring extrusion for fixing cannot effectively fix the nut body during tightening, and the bolt will drive the nut body to rotate. Content of the Utility Model

[0004] In view of the deficiencies of the prior art, the utility model develops a fixed flared nut. The utility model can not only prevent the nut from moving axially but also prevent the nut from rotating circumferentially, and no other tools are required to fix the nut during the tightening process, effectively improving the installation efficiency and effect.

[0005] The technical solution for the utility model to solve the technical problem is: A fixed flared nut, including a nut body. One end of the nut body is a flared part, and the other end is a threaded part. A locking hook is arranged on the outer side of the threaded part.

[0006] As an optimization, a baffle is arranged on the outer side of the threaded part, and the locking hook is arranged on the baffle, so as to facilitate the cooperation with the flange edge of the connected part. By arranging the baffle, it can be abutted against the connected part to limit the nut body.

[0007] As an optimization, the locking hook is in an L shape. The tail of the locking hook is connected to the baffle, and the head of the locking hook faces the flared part. The L-shaped locking hook will not affect the insertion of the flared part into the through hole of the connected part, and the head of the locking hook can normally cooperate with the flange edge of the connected part.

[0008] As an optimization, the end face of the locking hook head exceeds the side wall of the baffle plate facing the flared portion, which can ensure that the head of the locking hook can cooperate normally with the flange edge of the connected part.

[0009] As an optimization, the side face of the baffle plate on the side facing the flared portion exceeds the side face of the locking hook tail on the side facing the flared portion, which can prevent the tail of the locking hook from contacting the connected part and avoid the locking hook from being deformed by force.

[0010] As an optimization, the width of the locking hook tail gradually decreases from the tail to the head direction, which can ensure the strength of the locking hook tail.

[0011] As an optimization, the head of the locking hook is any one of a cylindrical shape and a plate shape.

[0012] As an optimization, an internal thread is provided inside the threaded portion, and the wall thickness of the flared portion is less than or equal to the wall thickness of the threaded portion, which can facilitate the expansion of the flared portion during stamping.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] By providing the flared portion, it can be inserted into the through hole of the connected part and can be expanded by stamping with a conical tooling, so as to fix the nut body on the connected part, prevent the nut body from axially moving, and facilitate the threaded connection with the bolt; by providing the threaded portion, it can be connected with the bolt, so as to connect the connected part and the connecting part; by providing the locking hook, it can cooperate with the flange edge of the connected part to prevent the nut body from rotating circumferentially during the assembly process with the bolt, so as to smoothly tighten the bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the front view of an embodiment of the utility model.

[0016] Figure 2 It is the right view of an embodiment of the utility model.

[0017] Figure 3 is Figure 2 The sectional view along the A-A direction.

[0018] Figure 4 It is the schematic diagram of the flared portion of an embodiment of the utility model expanding during assembly.

[0019] Figure 5 It is the schematic diagram of an embodiment of the utility model after being assembled with the bolt.

[0020] In the figure: 1, nut body; 2, locking hook; 3, baffle plate;

[0021] 11, flared portion; 12, threaded portion. Detailed Implementation Modes

[0022] In order to clearly illustrate the technical features of this solution, the present utility model will be elaborated in detail below through specific implementation modes and in conjunction with its accompanying drawings.

[0023] Embodiment 1

[0024] Figures 1 to 5 As an embodiment of the present utility model, as Figures 1 to 5 shown, a fixed flared nut includes a nut body 1. One end of the nut body 1 is a flared portion 11, and the other end is a threaded portion 12. At least one set of locking hooks 2 is provided on the outer side of the threaded portion 12.

[0025] By providing the flared portion 11, it can be inserted into the through hole of the connected part, and can be expanded by stamping through a conical tooling. The flaring angle is 30° - 60°, and the nut body 1 is fixed on the connected part to prevent the nut body 1 from axially moving, which is convenient for cooperating with a bolt to achieve threaded connection; by providing the threaded portion 12, it can be connected with a bolt, thereby connecting the connected part and the connecting part; by providing the locking hooks 2, it can cooperate with the flange edge of the connected part to prevent the nut body 1 from circumferentially rotating during the assembly process with the bolt, so as to smoothly tighten the bolt.

[0026] As Figures 1 to 5 shown, a baffle 3 is provided on the outer side of the threaded portion 12, and the locking hooks 2 are arranged on the baffle 3, so as to facilitate cooperation with the flange edge of the connected part. By providing the baffle 3, it can abut against the connected part to limit the nut body 1.

[0027] As Figures 1 to 5 shown, the locking hook 2 is in an L shape. The tail of the locking hook 2 is connected to the baffle 3, and the head of the locking hook 2 faces the flared portion 11. The nut body 1, the locking hook 2 and the baffle 3 are integrally formed. The L-shaped locking hook 2 does not affect the insertion of the flared portion 11 into the through hole of the connected part, and the head of the locking hook 2 can normally cooperate with the flange edge of the connected part.

[0028] As Figures 1 to 5 shown, the end face of the head of the locking hook 2 exceeds the side wall of the baffle 3 facing the flared portion 11. This can ensure that the head of the locking hook 2 can normally cooperate with the flange edge of the connected part.

[0029] As Figures 1 to 5 shown, the side surface of the baffle 3 facing the flared portion 11 exceeds the side surface of the tail of the locking hook 2 facing the flared portion 11. This can prevent the tail of the locking hook 2 from abutting against the connected part and avoid the locking hook 2 from being deformed by force.

[0030] As Figure 2As shown, the width of the tail of the locking hook 2 gradually decreases from the tail towards the head direction, which can ensure the strength of the tail of the locking hook 2.

[0031] As Figures 1 to 5 shown, the head of the locking hook 2 is either rod-shaped or plate-shaped.

[0032] As Figure 3 shown, an internal thread is provided inside the threaded portion 12. The wall thickness of the flared portion 11 is less than or equal to the wall thickness of the threaded portion 12. The inner diameter of the flared portion 11 is greater than or equal to the major diameter of the internal thread of the threaded portion 12. The outer diameter of the flared portion 11 is less than the diameter of the baffle 3, which can facilitate the insertion of the bolt into the flared portion 11 and avoid affecting the connection between the bolt and the threaded portion 12. It can also facilitate the flaring of the flared portion 11 during stamping.

[0033] During use, insert the flared portion 11 into the through-hole of the connected part, and make the head of the locking hook 2 cooperate with the flange edge of the connected part to prevent the nut body 1 from rotating circumferentially. Then use a conical tooling for stamping to make the flared portion 11 flare outwards, and the flaring angle is 45°, completing the axial fixation of the nut body 1. Then align the hole position on the connecting part with the through-hole of the connected part, pass the threaded rod of the bolt through the connecting part and the flared portion 11, and thread it with the threaded portion 12. During the tightening process, the head of the locking hook 2 will abut against the flange edge of the connected part to prevent the nut body 1 from rotating circumferentially. The utility model can not only prevent the nut from axially moving but also prevent the nut from rotating circumferentially, and no other tools are required to fix the nut during the tightening process, effectively improving the installation efficiency and effect.

[0034] In the present utility model, the description of the orientation or relative position relationship of the structure, such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicates the orientation or relative position relationship based on the orientation or position shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the structure must have a specific orientation, be constructed and operated in a specific orientation, so it should not be construed as a limitation to the present utility model.

Claims

1. A fixed flared nut, comprising a nut body (1), characterized in that: One end of the nut body (1) is a flared portion (11), and the other end is a threaded portion (12). A locking hook (2) is provided on the outer side of the threaded portion (12).

2. The fixed flaring nut according to claim 1, characterized in that: A baffle (3) is provided on the outer side of the threaded portion (12), and the locking hook (2) is arranged on the baffle (3).

3. The fixed flared nut according to claim 2, characterized in that: The locking hook (2) is L-shaped. The tail of the locking hook (2) is connected to the baffle (3), and the head of the locking hook (2) faces the flared portion (11).

4. The fixed flared nut according to claim 3, characterized in that: The end face of the head of the locking hook (2) extends beyond the side wall of the baffle (3) facing the flared portion (11).

5. The fixed flared nut according to claim 4, characterized in that: The side surface of the baffle (3) on the side facing the flared portion (11) extends beyond the side surface of the tail of the locking hook (2) on the side facing the flared portion (11).

6. The fixed flaring nut according to claim 5, characterized in that: The width of the tail of the locking hook (2) gradually decreases from the tail to the head direction.

7. The fixed flared nut according to claim 6, characterized in that: The head of the locking hook (2) is either cylindrical or plate-shaped.

8. The fixed flared nut according to any one of claims 1 to 7, characterized in that: Internal threads are provided inside the threaded portion (12), and the wall thickness of the flared portion (11) is less than or equal to the wall thickness of the threaded portion (12).

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