Nut with anti-loosening and self-locking functions and manufacturing die thereof

Abstract

The utility model relates to the technical field of fasteners, in particular to a nut with anti-loosening and self-locking functions and a manufacturing die thereof, which comprises a nut and a bolt which are matched with each other, and is characterized in that a first thread part and a second thread part which are communicated with each other are arranged in the nut, the first thread part is arranged in a perfect circle shape, and the second thread part is arranged in a perfect circle shape. The second thread part is arranged in an oval shape, and the second thread part is meshed with an external thread of the bolt so that the second thread part can deform. Two inclined faces are arranged at the end, close to the oval inner threads, of the nut and are symmetrically arranged along the center face of the nut. And the height of the inclined surface in the vertical direction is 1-2mm. By arranging the first thread part and the second thread part, during use, the external thread of the bolt is meshed with the second thread part of the nut, the second thread part is forced to deform frequently, and then locking force is generated, so that the nut is prevented from loosening, and potential safety hazards caused by bolt loosening due to mechanical working vibration are effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a nut with a loosening prevention and self-locking function and a manufacturing die thereof. Background Art

[0002] The problem of preventing loosening during the use of bolt connections is one of the key problems that the fastener field has been seeking to solve. Using ordinary washers or double nuts has poor anti-loosening effects, while using special anti-loosening washers has a high manufacturing cost and affects the installation efficiency.

[0003] The anti-loosening nut is integrally formed by a large gasket and a nut. The gasket end has anti-slip tooth patterns, which increases the surface area contact between the nut and the workpiece. Compared with the combination of an ordinary nut and a washer, it has stronger anti-loosening performance and is more convenient to install and use. However, ordinary anti-loosening nuts still have loosening problems in high-vibration environments and are prone to safety hazards during use. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a nut with a loosening prevention and self-locking function and a manufacturing die thereof to solve the above deficiencies in the prior art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A nut with a loosening prevention and self-locking function includes a matching nut and bolt, and is characterized in that: a first threaded portion and a second threaded portion that are communicated are arranged inside the nut. The first threaded portion is arranged in a regular circular shape, the second threaded portion is arranged in an elliptical shape, and the second threaded portion meshes with the external thread of the bolt so that the second threaded portion deforms.

[0007] Further, two inclined surfaces are arranged at one end of the nut close to the elliptical internal thread, and the two inclined surfaces are symmetrically arranged along the central plane of the nut.

[0008] Further, the height of the inclined surface in the vertical direction is 1-2 mm.

[0009] Further, a gasket is fixedly connected to one end of the nut close to the first threaded portion.

[0010] A manufacturing die includes a die table, and a positioning mechanism is arranged on the die table. The positioning mechanism includes two limiting frames. The two limiting frames are respectively fixedly arranged and slidably arranged on the die table. The slidably arranged limiting frame is connected to a first driving member. Two stamping plates are also slidably connected to the die table. The inclination degree of the stamping plates is the same as that of the inclined surfaces on the nut. The two stamping plates are both connected to a second driving member. A limiting cavity for placing the nut is formed between the two limiting frames and the two pressing plates.

[0011] Further, the limiting frame includes a first support rod, and a first inclined rod and a second inclined rod are fixedly connected to the end of the first support rod. The included angle between the first inclined rod and the second inclined rod is 120 degrees.

[0012] Further, the first driving member is a hydraulic cylinder, and the output end of the hydraulic cylinder is fixedly connected to the first support rod of the sliding limiting frame.

[0013] Further, the first inclined rod and the second inclined rod have the same height, and their height is 3 to 4 times the height of the nut inclined surface and not greater than 1 / 10 of the overall height of the mold table.

[0014] Further, the second driving member is a driving gear rotatably arranged in the mold table. Two racks are respectively meshed and connected to the driving gear. A transmission rod is fixedly connected to each rack. The transmission rod is slidably arranged on the mold table, and the transmission rod is fixedly connected to the stamping plate.

[0015] Further, the included angle between the stamping plate and the surface of the mold table is 100 to 120 degrees.

[0016] In the above technical solution, the beneficial effects of a nut with a loosening prevention and self-locking function and its manufacturing mold provided by the present utility model are as follows:

[0017] 1. By providing the first thread portion and the second thread portion, during use, the external thread of the bolt meshes with the second thread portion of the nut, forcing the second thread portion to constantly deform, thereby generating a locking force to prevent the nut from loosening.

[0018] 2. By providing the manufacturing mold, the nut is placed in the limiting cavity, and the limiting frame is adjusted to fix the position of the nut. The nut is cold-stamped by two stamping plates, so that an oval internal thread is formed at one end of the nut.

[0019] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not intended to limit the present disclosure.

[0020] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and does not represent the full scope of the disclosed technology or a complete disclosure of all features. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0022] Figure 1Schematic diagram of the overall structure of the nut provided by the embodiment of the present utility model;

[0023] Figure 2 Schematic diagram of the structure of the mold table provided by the embodiment of the present utility model;

[0024] Figure 3 Schematic diagram of the structure of the second driving member provided by the embodiment of the present utility model.

[0025] Explanation of reference numerals:

[0026] 1. Nut; 11. First thread portion; 12. Second thread portion; 13. Inclined surface; 14. Gasket; 2. Mold table; 31. Limit frame; 311. First support rod; 312. First inclined rod; 313. Second inclined rod; 32. Hydraulic cylinder; 33. Stamping plate; 34. Limit cavity; 4. Second driving member; 41. Driving gear; 42. Rack; 43. Transmission rod. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Apparently, the described embodiments are some but not all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0028] Please refer to Figures 1-3 , a nut 1 with an anti-loosening and self-locking function, including a matching nut 1 and a bolt, characterized in that: a communicating first thread portion 11 and a second thread portion 12 are provided inside the nut 1, the first thread portion 11 is arranged in a regular circular shape, the second thread portion 12 is arranged in an oval shape, and the second thread portion 12 meshes with the external thread of the bolt so that the second thread portion 12 deforms.

[0029] Further, two inclined surfaces 13 are provided at one end of the nut 1 close to the oval internal thread, and the two inclined surfaces 13 are symmetrically arranged along the central plane of the nut 1. By providing the inclined surfaces 13, it is convenient for production and manufacturing to form the oval internal thread.

[0030] Further, the height of the inclined surface 13 in the vertical direction is 1-2 mm. On the one hand, it is to prevent the nut 1 from having too large an ovality and being unable to be screwed to the predetermined position and predetermined torque smoothly, resulting in the nut 1 being unusable; on the other hand, it is to prevent the ovality from being too small and unable to generate sufficient deformation, thereby resulting in a poor anti-loosening effect.

[0031] Furthermore, a gasket 14 is fixedly connected to one end of the nut 1 close to the first threaded portion 11. The gasket 14 contacts the object to be fastened to further improve the anti-loosening performance.

[0032] A manufacturing die includes a die table 2, and a positioning mechanism is arranged on the die table 2. The positioning mechanism includes two limiting frames 31. The two limiting frames 31 are respectively fixedly arranged and slidably arranged on the die table 2. The slidable limiting frame 31 is connected to a first driving member. Two stamping plates 33 are also slidably connected to the die table 2. The inclination degree of the stamping plates 33 is the same as that of the inclined surface 13 on the nut 1. The two stamping plates 33 are both connected to a second driving member 4. A limiting cavity 34 for placing the nut 1 is formed between the two limiting frames 31 and the two pressing plates.

[0033] Furthermore, the limiting frame 31 includes a first support rod 311. A first inclined rod 312 and a second inclined rod 313 are fixedly connected to the end of the first support rod 311. The included angle between the first inclined rod 312 and the second inclined rod 313 is 120 degrees. The first inclined rod 312 and the second inclined rod 313 are in contact with the side of the nut 1 to limit and fix the nut 1.

[0034] Furthermore, the first driving member is a hydraulic cylinder 32. The output end of the hydraulic cylinder 32 is fixedly connected to the first support rod 311 of the slidable limiting frame 31.

[0035] Furthermore, the first inclined rod 312 and the second inclined rod 313 have the same height, and their height is 3 to 4 times the height of the inclined surface 13 of the nut 1 and not greater than 1 / 10 of the overall height of the die table 2. So that during cold stamping processing, while the nut 1 generates symmetric cold plastic deformation that meets the requirements, it can also ensure that other positions are not affected. In addition, it can also improve the stability of the die table 2 during large-batch stamping.

[0036] Furthermore, the second driving member 4 is a driving gear 41 rotatably arranged in the die table 2. Two racks 42 are respectively meshed and connected to the driving gear 41. A transmission rod 43 is fixedly connected to each rack 42. The transmission rod 43 is slidably arranged on the die table 2. The transmission rod 43 is fixedly connected to the stamping plate 33. The driving gear 41 is fixedly connected to the motor in the die table 2. The motor drives the driving gear 41 to rotate. Through the meshing of the driving gear 41 and the rack 42, the rack 42 drives the transmission rod 43 to slide, and the sliding of the transmission rod 43 drives the corresponding stamping plate 33 to move, so that the stamping plate 33 on the die table 2 can perform cold stamping processing on the nut 1 in the limiting cavity 34.

[0037] Further, the included angle between the stamping plate 33 and the surface of the die table 2 is 100 to 120 degrees. This design, in conjunction with the height of the inclined surface 13 in the vertical direction, acts together to limit the ovality of the nut 1 and enhance the anti-loosening effect of the nut 1.

[0038] Only some exemplary embodiments of the present invention have been described by way of illustration above. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A nut (1) with a function of preventing loosening and self-locking, comprising a matching nut (1) and a bolt, characterized in that: A first threaded portion (11) and a second threaded portion (12) which are communicated are arranged inside the nut (1). The first threaded portion (11) is arranged in a perfect circle shape, and the second threaded portion (12) is arranged in an oval shape. The second threaded portion (12) is engaged with the external thread of a bolt so that the second threaded portion (12) deforms.

2. A nut (1) with a loosening prevention and self-locking function according to claim 1, characterized in that, Two inclined surfaces (13) are arranged at one end of the nut (1) close to the oval internal thread. The two inclined surfaces (13) are symmetrically arranged along the central plane of the nut (1).

3. The nut (1) with a function of preventing loosening and self-locking according to claim 2, characterized in that, The height of the inclined surface (13) in the vertical direction is 1-2 mm.

4. A manufacturing mold for manufacturing a nut (1) with a function of preventing loosening and self-locking as described in any one of claims 1-3, characterized in that, It includes a die table (2). A positioning mechanism is arranged on the die table (2). The positioning mechanism includes two limiting frames (31). The two limiting frames (31) are respectively fixedly arranged and slidably arranged on the die table (2). The slidably arranged limiting frame (31) is connected with a first driving member. Two stamping plates (33) are also slidably connected to the die table (2). The inclination degree of the stamping plate (33) is the same as that of the inclined surface (13) on the nut (1). The two stamping plates (33) are both connected to a second driving member (4). A limiting cavity (34) for placing the nut (1) is formed between the two limiting frames (31) and the two pressing plates.

5. A manufacturing mold according to claim 4, characterized in that, The limiting frame (31) includes a first support rod (311). A first inclined rod (312) and a second inclined rod (313) are fixedly connected to the end of the first support rod (311). The included angle between the first inclined rod (312) and the second inclined rod (313) is 120 degrees.

6. A manufacturing mold according to claim 5, characterized in that, The first driving member is a hydraulic cylinder (32). The output end of the hydraulic cylinder (32) is fixedly connected to the first support rod (311) of the slidably arranged limiting frame (31).

7. A manufacturing mold according to claim 5, characterized in that, The first inclined rod (312) and the second inclined rod (313) have the same height, and their height is 3-4 times the height of the inclined surface (13) of the nut (1) and not greater than 1 / 10 of the overall height of the die table (2).

8. A manufacturing mold according to claim 4, characterized in that, The second driving member (4) is a driving gear (41) rotatably arranged inside the die table (2). Two racks (42) are respectively meshed and connected to the driving gear (41). A transmission rod (43) is fixedly connected to each rack (42). The transmission rod (43) is slidably arranged on the die table (2). The transmission rod (43) is fixedly connected to the stamping plate (33).

9. A manufacturing mold according to claim 8, characterized in that, The included angle between the stamping plate (33) and the surface of the die table (2) is 100-120 degrees.

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