Nut for magnesium-aluminum alloy riveting

Abstract

According to the technical scheme, the nut for magnesium-aluminum alloy riveting is characterized in that the nut comprises a threaded prefabricated sleeve, and the outer side of the threaded prefabricated sleeve is fixedly connected with an abutting ring used for abutting against a magnesium-aluminum alloy plate and a supporting sleeve used for twisting; the end, away from the abutting ring, of the supporting sleeve is fixedly connected with a first stamping ring fixedly connected with the threaded prefabricated sleeve and used for forming an embedding groove, the end, away from the supporting sleeve, of the abutting ring is connected with a positioning ring contained in the embedding groove, the outer diameter of the positioning ring is the same as the maximum outer diameter of the first stamping ring, and the inner diameter of the positioning ring is the same as the minimum inner diameter of the first stamping ring. The first stamping ring is arranged to form the caulking groove, the positioning ring is contained in the caulking groove, the positioning ring can abut against the inner wall of the caulking groove, so that the nut is prevented from moving, the caulking groove can form the abutting face in multiple directions, multiple supports are formed, and the situation that a screw is directly driven to impact the inner wall of a threaded installation hole when impacted is avoided.

Description

Technical Field

[0001] The utility model relates to a nut, and more specifically, to a nut for riveting magnesium alloy. Background Art

[0002] Magnesium alloy is an alloy composed mainly of magnesium and aluminum, with other elements such as zinc, manganese, and cerium added. In industrial materials, magnesium alloy usually has characteristics such as low density, high specific strength, high specific elastic modulus, good heat dissipation, and good shock absorption. Especially, its ability to withstand impact loads is greater than that of common aluminum alloys. Therefore, it is suitable as a special material. In actual use, it is found that due to the relatively large coefficient of thermal expansion and easy deformation of magnesium alloy, in the environment where riveting is required, the screw passes through from the inner side to the outer side of the magnesium alloy plate, and the nut is threadedly connected to the screw on the outer side of the magnesium alloy plate. This riveting connection method is commonly used in magnesium alloy products that need to be disassembled frequently. Since the nut has only the screw as support, the protruding nut on the outer side will directly drive the screw to impact the inner wall of the threaded mounting hole when being impacted, thereby causing deformation of the threaded mounting hole. Therefore, a nut for riveting magnesium alloy is needed, and this device can form multiple supports after installation to avoid directly driving the screw to impact the inner wall of the threaded mounting hole when being impacted.

[0003] Combined with the above reasons, how to form multiple supports after installation is exactly the problem considered in this application. Summary of the Utility Model

[0004] A nut for riveting magnesium alloy is provided to solve the deficiencies of the prior art. This device can form multiple supports after installation to avoid directly driving the screw to impact the inner wall of the threaded mounting hole when being impacted.

[0005] To achieve the above object, the following technical solution is provided: A nut for riveting magnesium alloy includes a threaded prefabricated sleeve. A contact ring for abutting against the magnesium alloy plate and a support sleeve for twisting are fixedly connected to the outer side of the threaded prefabricated sleeve. A first stamping ring fixedly connected to the threaded prefabricated sleeve and used for forming an embedding groove is fixedly connected to one end of the support sleeve away from the contact ring. A positioning ring received in the embedding groove is connected to one end of the contact ring away from the support sleeve. The outer diameter of the positioning ring is the same as the maximum outer diameter of the first stamping ring, and the inner diameter of the positioning ring is the same as the minimum inner diameter of the first stamping ring.

[0006] In summary, the above technical solutions have the following beneficial effects: The structure of the nut itself is relatively simple. If the tightening method is directly used to increase the pressure on the easily deformable magnesium alloy, the nut may be embedded in the magnesium alloy plate due to the easily deformable characteristics of the magnesium alloy. Since only the fit is strengthened in the direction perpendicular to the surface of the magnesium alloy plate, when impacted, the force direction of the nut will not be completely perpendicular to the surface of the magnesium alloy plate. Therefore, it is impossible to avoid directly driving the screw to impact the inner wall of the threaded mounting hole when impacted, and it will also make the installation and removal of the nut more inconvenient. Therefore, in the present invention, the method of using the positioning ring to accommodate the groove formed by the first stamping ring is adopted, and the multi-directional blocking movement is realized by the positioning ring abutting against the inner wall of the groove. Moreover, the formed threaded mounting hole is also at the center of the groove, which can further form multiple supports to avoid directly driving the screw to impact the inner wall of the threaded mounting hole when impacted;

[0007] Due to the special properties of the magnesium alloy itself, the connection strength for the nut can be slightly reduced. Therefore, a split design can be adopted. The threaded prefabricated sleeve is used to machine the adapted thread according to the thread of the screw as needed during subsequent processing. Before use, the first stamping ring on the nut needs to be used to punch a groove in the magnesium alloy plate, and then the nut is reversed for normal use, so that the positioning ring can be embedded in the groove. In this way, the nut has its own stamping function and is positioned by the screw, reducing the possibility of errors;

[0008] The present invention forms a groove by setting the first stamping ring, and the positioning ring is accommodated in the groove. The positioning ring can abut against the inner wall of the groove, thereby preventing the nut from moving. Moreover, the groove can form a contact surface from multiple directions, thus forming multiple supports to avoid directly driving the screw to impact the inner wall of the threaded mounting hole when impacted. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a sectional view of a nut for riveting magnesium alloy;

[0010] Figure 2 It is a three-dimensional structural schematic diagram of the present invention.

[0011] Reference numerals: 1, threaded prefabricated sleeve; 2, abutting ring; 3, support sleeve; 4, first stamping ring; 5, positioning ring;

[0012] 11, first inclined surface; 12, connecting ring; 13, second inclined surface; 14, third inclined surface;

[0013] 21, fitting sleeve; 22, accommodating cavity; 23, opening;

[0014] 31, abutting member;

[0015] 41, second stamping ring;

[0016] 51. Blocking member; 52. Spring. Detailed implementation mode

[0017] The following further details the present utility model in conjunction with the drawings and embodiments. The same components are denoted by the same reference numerals. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "bottom surface" and "top surface", "inner" and "outer" refer to the directions towards or away from the geometric center of a specific component respectively.

[0018] Refer to Figure 1-2 As shown, the nut for riveting magnesium alloy includes a threaded prefabricated sleeve 1. A contact ring 2 for abutting against the magnesium alloy plate and a support sleeve 3 for twisting are fixedly connected to the outside of the threaded prefabricated sleeve 1. One end of the support sleeve 3 away from the contact ring 2 is fixedly connected to a first stamping ring 4 that is fixedly connected to the threaded prefabricated sleeve 1 and used to form an embedding groove. One end of the contact ring 2 away from the support sleeve 3 is connected with a positioning ring 5 accommodated in the embedding groove. The outer diameter of the positioning ring 5 is the same as the maximum outer diameter of the first stamping ring 4, and the inner diameter of the positioning ring 5 is the same as the minimum inner diameter of the first stamping ring 4.

[0019] The structure of the nut itself is relatively simple. If the pressure between the nut and the easily deformable magnesium alloy is directly increased by tightening, the nut may be embedded in the magnesium alloy plate due to the easily deformable characteristics of the magnesium alloy. Since only the fit degree in the direction perpendicular to the surface of the magnesium alloy plate is enhanced in this way, when being impacted, the force direction of the nut will not be completely perpendicular to the surface of the magnesium alloy plate. Therefore, it is impossible to avoid directly driving the screw to impact the inner wall of the threaded installation hole when being impacted, and it will also make the installation and disassembly of the nut more inconvenient. Therefore, in the present utility model, the positioning ring 5 is used to be accommodated in the embedding groove formed by the first stamping ring 4, and the multi-directional blocking movement is realized by the positioning ring 5 abutting against the inner wall of the embedding groove. Moreover, the formed threaded installation hole is still at the center of the embedding groove, which can further form multiple supports to avoid directly driving the screw to impact the inner wall of the threaded installation hole when being impacted.

[0020] Due to the special properties of magnesium alloy itself, the connection strength for the nut can be slightly reduced. Therefore, a split design can be adopted. The threaded prefabricated sleeve 1 is used to process the adapted thread according to the thread of the screw required in subsequent processing. Before use, the first stamping ring 4 on the nut needs to be used to stamp an embedding groove on the magnesium alloy plate, and then the nut is reversed for normal use, so that the positioning ring 5 can be embedded in the embedding groove. In this way, the nut has its own stamping function and is positioned by the screw, reducing the possibility of errors.

[0021] The utility model forms an embedding groove by setting a first stamping ring 4, and accommodates a positioning ring 5 in the embedding groove. The positioning ring 5 can contact with the inner wall of the embedding groove to prevent the nut from moving, and the embedding groove can form a contact surface from multiple directions, thereby forming multiple supports to avoid directly driving the screw to impact the inner wall of the threaded mounting hole when impacted.

[0022] Furthermore, the inner wall of the threaded preformed sleeve 1 facing the first punching ring 4 is provided with a first inclined surface 11 inclined toward the inside of the threaded preformed sleeve 1, a connecting ring 12 fixedly connected to the first punching ring 4 is fixedly connected to the threaded preformed sleeve 1, and the inner wall of the connecting ring 12 is provided with a second inclined surface 13 inclined toward the inside of the threaded preformed sleeve 1, the inclination angle of the first inclined surface 11 is the same as the inclination angle of the second inclined surface 13, and the first inclined surface 11 and the second inclined surface 13 are spliced ​​to form a third inclined surface 14 for guiding the connecting screw;

[0023] A second punching ring 41 is fixedly connected to the top of the first punching ring 4. The cross section of the second punching ring 41 is an isosceles trapezoidal shape. The bottom of the second punching ring 41 coincides with the top of the first punching ring 4.

[0024] Since the embedding groove formed by punching the first punching ring 4 is only adapted to the positioning ring 5, it is necessary to avoid the situation where the embedding groove is enlarged during the forming process as much as possible. Therefore, the second punching ring 41 is set as the main punching component. Only when the actual contact area of ​​the positioning ring 5 increases due to wear and other reasons, the punching operation needs to further enlarge the embedding groove through the first punching ring 4 and the connecting ring 12;

[0025] In addition, in order to enable rapid positioning and convenient disengagement from the groove during stamping, a first inclined surface 11 is provided on the inner wall of the threaded preformed sleeve 1 at the end facing the first stamping ring 4, and a second inclined surface 13 is provided on the inner wall of the connecting ring 12 to cooperate with the first inclined surface 11 to form a complete inclined surface structure to prevent interference and obstruction.

[0026] Furthermore, the abutment ring 2 is fixedly connected to a fitting sleeve 21 which is fixedly connected to both the support sleeve 3 and the threaded prefabricated sleeve 1, and the side surface of the fitting sleeve 21 is concave;

[0027] Due to the deformable nature of the magnesium-aluminum alloy plate itself, a protective plate is sometimes installed on the outside, so it is necessary to provide a fitting sleeve 21 to assist in positioning the protective plate.

[0028] Furthermore, a plurality of resisting members 31 for increasing friction force are fixedly connected to the outer side of the support sleeve 3, so that it is convenient for workers to use when installing the nut.

[0029] Furthermore, a receiving cavity 22 and an opening 23 for connecting the receiving cavity 22 with the outside of the contact ring 2 are provided on the side of the contact ring 2 away from the support sleeve 3, and the positioning ring 5 is slidably connected with the inner wall of the opening 23;

[0030] The positioning ring 5 is fixedly connected with a blocking member 51 that is slidably connected to the inner wall of the receiving cavity 22, and the blocking member 51 is fixedly connected with a spring 52 that is fixedly connected to the inner wall of the receiving cavity 22;

[0031] Considering the reason of wear, the length of the positioning ring 5 can be set longer to cope with it. Therefore, a receiving cavity 22 is also required to accommodate the redundant part of the positioning ring 5, and a blocking member 51 is provided to prevent the positioning ring 5 from completely detaching. The positioning ring 5 is pushed out by the spring 52, so that the positioning ring 5 can normally perform the function of preventing the nut from moving.

[0032] Furthermore, a chamfer is provided at one end of the abutting ring 2 away from the support sleeve 3, which can facilitate the disassembly of the nut.

[0033] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A nut for riveting magnesium-aluminum alloys, characterized in that: It comprises a threaded preformed sleeve, the outer side of which is fixedly connected with a resistance ring for abutting against a magnesium-aluminum alloy plate and a support sleeve for twisting, the support sleeve is fixedly connected with a first stamping ring fixedly connected to the threaded preformed sleeve and used for forming an embedding groove at one end away from the resistance ring, the resistance ring is connected with a positioning ring accommodated in the embedding groove at one end away from the support sleeve, the outer diameter of the positioning ring is the same as the maximum outer diameter of the first stamping ring, and the inner diameter of the positioning ring is the same as the minimum inner diameter of the first stamping ring.

2. The nut for magnesium-aluminum alloy riveting according to claim 1, characterized in that: The inner wall of the threaded preformed sleeve at one end facing the first stamping ring is provided with a first inclined surface inclined toward the inside of the threaded preformed sleeve, a connecting ring fixedly connected to the first stamping ring is fixedly connected inside the threaded preformed sleeve, and the inner wall of the connecting ring is provided with a second inclined surface inclined toward the inside of the threaded preformed sleeve, the inclination angle of the first inclined surface is the same as the inclination angle of the second inclined surface, and the first inclined surface and the second inclined surface are spliced ​​to form a third inclined surface for guiding the connecting screw.

3. The nut for magnesium-aluminum alloy riveting according to claim 2, characterized in that: The top of the first stamping ring is fixedly connected with a second stamping ring, the cross section of the second stamping ring is an isosceles trapezoid, and the bottom of the second stamping ring overlaps with the top of the first stamping ring.

4. The nut for magnesium-aluminum alloy riveting according to claim 1, characterized in that: The abutment ring is fixedly connected with an engaging sleeve which is fixedly connected with both the supporting sleeve and the threaded prefabricated sleeve, and the side surface of the engaging sleeve is concave.

5. The nut for magnesium-aluminum alloy riveting according to claim 1, characterized in that: A plurality of abutment members for increasing friction force are fixedly connected to the outer side of the support sleeve.

6. The nut for magnesium-aluminum alloy riveting according to claim 1, characterized in that: The side of the abutment ring away from the supporting sleeve is provided with an accommodating cavity and an opening for connecting the accommodating cavity with the outside of the abutment ring, and the positioning ring is slidably connected with the inner wall of the opening.

7. The nut for magnesium-aluminum alloy riveting according to claim 6, characterized in that: The positioning ring is fixedly connected with a blocking member which is slidably connected with the inner wall of the accommodating cavity, and the blocking member is fixedly connected with a spring which is fixedly connected with the inner wall of the accommodating cavity.

8. The nut for magnesium-aluminum alloy riveting according to claim 6, characterized in that: The end of the abutment ring away from the support sleeve is also provided with a chamfer.

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