Rapid composite nut

Abstract

The utility model relates to the field of fasteners, in particular to a quick composite nut. Comprising an outer nut 1, a middle nut 2, a rotary body part 3 forming an inner nut assembly, an adjusting nut 4 and a clamping spring 7, internal threads of the outer nut 1 are matched with external threads of the middle nut 2, and a conical surface B1 of the rotary body part 3 forming the inner nut assembly is in contact fit with a conical surface A1 of the middle nut 2. The adjusting nut 4 is respectively matched with the middle nut 2 and the rotary body part 3 forming the inner nut assembly, the quick composite nut can be directly inserted into a bolt or a stud, long-distance screwing-in and screwing-out are avoided, and the quick composite nut is convenient and fast to use. Rotation body parts forming the inner nut assembly do not rotate relative to the bolt or the stud, abrasion and deformation are not prone to occurring, and the service life is prolonged.

Description

Technical Field

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

[0002] Fasteners are widely used parts in various industries, which play a role in connection and tightening. Nuts are an important part in the field of fasteners. There are different technical requirements according to the usage scenarios. For example, for longer bolts or studs, and the need for frequent tightening and disconnection, traditional nuts have obvious shortcomings. On the one hand, the nuts have a long screw-in and screw-out distance, and the use process is time-consuming and laborious. Especially when there are defects on the thread surface, the operator cannot turn the nut with his fingers without the help of a wrench. On the other hand, frequent tightening and disconnecting will cause the thread profile to deform and eventually fail, resulting in safety hazards and a lot of waste. Utility Model Content

[0003] Aiming at the shortcomings of the existing nuts, such as being time-consuming, labor-intensive and prone to failure during use, the utility model proposes a quick composite nut, and the technical solution is now disclosed.

[0004] A quick composite nut comprises an outer nut, an intermediate nut, a rotating body part constituting an inner nut assembly, an adjusting nut, and a retaining spring.

[0005] The internal thread of the external nut cooperates with the external thread of the intermediate nut;

[0006] One end of the intermediate nut has an external thread, and a conical surface A1 is designed on the inner side close to the external thread end, the small end of the conical surface A1 faces the external thread end of the intermediate nut, and a conical surface A2 is designed on the inner side of the intermediate nut away from the external thread end, the small end of the conical surface A2 is away from the external thread end of the intermediate nut and is cut off by the end face, and there is a cylindrical surface A3 between the conical surface A1 of the intermediate nut and the conical surface A2;

[0007] The number of the rotating body parts constituting the internal nut assembly is two or more, the outer side of which is a conical surface B1 in contact with the conical surface A1 of the intermediate nut, the inner side of which is close to the small end of the conical surface Bl and is designed with an internal thread to achieve cooperation with the external thread of the bolt or stud, and the inner side of which is far away from the small end of the conical surface B1 and is designed with a conical thread, and the large end of the conical thread faces the large end of the conical surface B1;

[0008] The cylindrical surface C1 formed by the middle protrusion on the outer side of the adjusting nut is in clearance with the cylindrical surface A3 of the intermediate nut, the outer side of one end is a tapered thread, and the tapered thread is in clearance with the tapered thread of the rotating body part constituting the inner nut assembly, and the other end is a protruding structure, and a plane C2 is naturally formed between the cylindrical surface C1 and the protruding structure, and a through hole is provided at the axis of the adjusting nut, and its inner diameter is in clearance with the major diameter of the bolt or stud thread;

[0009] A conical surface E1 is designed on one edge of the outer contour of the retaining spring, and the conical surface E1 is force-contacted with the conical surface A2 on the middle nut, and the plane on the other side of the retaining spring is force-contacted with the plane C2 of the adjusting nut.

[0010] Preferably, the quick composite nut further includes an upper coil spring and a lower coil spring, and the rotating body part constituting the inner nut assembly is also designed with coil spring positioning grooves, two in number, and radial tension is provided by the upper coil spring and the lower coil spring respectively, so that the rotating body part constituting the inner nut assembly is in force contact and fit with the conical surface A1 of the intermediate nut through the conical surface B1.

[0011] Preferably, the outer contour of the outer nut is a regular polygonal structure, one end is a semi-open design, and its end surface is outwardly formed to form an outer nut protruding structure to achieve contact with the fastened workpiece, there is a through hole at the axis whose inner diameter matches the major diameter clearance of the bolt or stud thread, and the other end is an open design, the adjusting nut protruding structure is a regular polygonal structure or a cylindrical structure, and the intermediate nut thread surface has scale lines for warning the screwing length.

[0012] Preferably, the internal thread of the external nut and the external thread of the intermediate nut are sawtooth threads, trapezoidal threads, rectangular threads, or triangular threads.

[0013] Preferably, the conical thread of the rotating body part constituting the internal nut assembly and the conical thread of the adjusting nut are left-handed rectangular conical threads.

[0014] Preferably, the middle rotation radius R1 of the same radial section of the major diameter of the tapered thread of the rotating body part constituting the internal nut assembly is smaller than R2 on both sides, which can ensure that the major diameter of the thread of the rotating body part constituting the internal nut assembly is always in linear contact with the adjusting nut during rotation and axial movement, avoiding interference between the two sides of the tapered thread of the rotating body part constituting the internal nut assembly and the adjusting nut, and a gap between the minor diameters of the threads of the two.

[0015] Preferably, the rotating body parts constituting the inner nut assembly still have a gap between each other when they are in a tightly matched state with the bolt or stud.

[0016] Preferably, the conical surface A1 of the intermediate nut, the conical surface Bl of the rotating body part constituting the internal nut assembly, the tapered thread of the rotating body part constituting the internal nut assembly, and the tapered thread of the adjusting nut have the same taper.

[0017] Preferably, the outer contour edge of the retaining spring has no conical surface, but is directly in force contact with the conical surface A2 on the middle nut through its ridge line.

[0018] Preferably, the positive pressure between the intermediate nut and the rotating body part constituting the inner nut assembly can be controlled by controlling the cone angle of the conical surface between the two, so that when the wrench rotates the outer nut, the rotating body part constituting the inner nut assembly and the bolt or stud do not rotate relative to each other.

[0019] The beneficial effects of the utility model are: the nut can be directly inserted into the bolt or stud, avoiding long-distance screwing in and out, and is convenient to use. In addition, when the quick composite nut is tightened and released, the thread pair formed by the internal thread of the rotating body part constituting the internal nut assembly and the external thread of the bolt or stud will not produce relative rotation, and is not easy to produce wear and deformation, thereby extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a quick composite nut exploded view; Figure 2 It is a front view of a quick compound nut;

[0021] Figure 3 It is a quick compound nut AA section view; Figure 4 It is a quick compound nut BB cutaway view;

[0022] Figure 5 It is a quick compound nut J enlarged view; Figure 6 It is the left view of the outer nut;

[0023] Figure 7 It is the cross-sectional view of the outer nut CC; Figure 8 It is the front view of the middle nut;

[0024] Fig. 9 This is the DD section view of the middle nut; Fig.10 It is a front view of the rotating body parts constituting the inner nut assembly;

[0025] Fig.11 It is the EE section view of the rotating body part constituting the internal nut assembly;

[0026] Fig.12 is the front view of the adjusting nut; Fig.13 This is the sectional view of the adjusting nut FF;

[0027] Fig.14 It is an isometric view of the circlip;

[0028] Figure markings: 1. outer nut; 2. intermediate nut; 3. rotating body part constituting the inner nut assembly; 4. adjusting nut; 5. lower coil spring; 6. upper coil spring; 7. retaining spring; 8. protruding structure of outer nut; 9. small end closing and truncation of the conical surface A2 of the intermediate nut; 10. conical surface A2 of the intermediate nut; 11. cylindrical surface A3 of the intermediate nut; 12. conical surface A1 of the intermediate nut; 13. conical surface B1 of the rotating body part constituting the inner nut assembly; 14. coil spring locating groove of the rotating body part constituting the inner nut assembly; 15. cylindrical surface C1 of the adjusting nut; 16. plane C2 of the adjusting nut; 17. conical surface E1 of the retaining spring; 18. scale line of the intermediate nut. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Reference Figures 1 to 14 A quick composite nut includes an outer nut 1, an intermediate nut 2, a rotating body part 3 constituting an inner nut assembly, an adjusting nut 4, and a retaining spring 7.

[0031] The internal thread of the external nut 1 matches the external thread of the intermediate nut 2;

[0032] One end of the intermediate nut 2 has an external thread, and a conical surface A1 is designed on the inner side close to the external thread end, the small end of the conical surface A1 faces the external thread end of the intermediate nut 2, and a conical surface A2 is designed on the inner side of the intermediate nut 2 away from the external thread end, the small end of the conical surface A2 is away from the external thread end of the intermediate nut 2 and is cut off by the end face, and there is a cylindrical surface A3 between the conical surface A1 and the conical surface A2 of the intermediate nut 2;

[0033] The number of the rotating body parts 3 constituting the internal nut assembly is two or more, the outer side of which is a conical surface B1 in contact with the conical surface A1 of the intermediate nut 2, the inner side of which is close to the small end of the conical surface B1 and is designed with an internal thread to achieve cooperation with the external thread of the bolt or stud, and the inner side of which is far away from the small end of the conical surface B1 and is designed with a conical thread, and the large end of the conical thread faces the large end of the conical surface B1;

[0034] The middle protrusion on the outer side of the adjusting nut 4 forms a cylindrical surface C1 which is in clearance with the cylindrical surface A3 of the intermediate nut 2. The outer side of one end is a tapered thread which is in clearance with the tapered thread of the rotating body part 3 constituting the inner nut assembly. The other end is a protruding structure. A plane C2 is naturally formed between the cylindrical surface C1 and the protruding structure. A through hole is provided at the axis of the adjusting nut 4, and its inner diameter is in clearance with the major diameter of the bolt or stud thread.

[0035] A conical surface E1 is designed on one edge of the outer contour of the retaining spring 7, and the conical surface E1 is in force contact with the conical surface A2 on the middle nut 2, and the plane on the other side of the retaining spring 7 is in force contact with the plane C2 of the adjusting nut 4.

[0036] Preferably, the quick composite nut further includes an upper coil spring 6 and a lower coil spring 5, and the rotating body part 3 constituting the inner nut assembly is also designed with two coil spring positioning grooves, and radial tension is provided by the upper coil spring 6 and the lower coil spring 5 respectively, so that the rotating body part 3 constituting the inner nut assembly is in force contact and fit with the conical surface A1 of the intermediate nut 2 through the conical surface B1.

[0037] Preferably, the outer contour of the outer nut 1 is a regular polygonal structure, one end is a semi-open design, and its end surface forms a protruding structure of the outer nut 1 outward to achieve contact with the fastened workpiece, there is a through hole at the axis whose inner diameter is matched with the major diameter clearance of the bolt or stud thread, and the other end is an open design, the adjusting nut protruding structure is a regular polygonal structure or a cylindrical structure, and the intermediate nut thread surface has a scale line 18 for warning the screwing length.

[0038] Preferably, the internal thread of the external nut 1 and the external thread of the intermediate nut 2 are sawtooth threads, trapezoidal threads, rectangular threads, or triangular threads.

[0039] Preferably, the tapered thread of the rotating body part 3 constituting the internal nut assembly and the tapered thread of the adjusting nut 4 are left-handed rectangular tapered threads.

[0040] Preferably, the middle rotation radius R1 of the same radial section of the tapered thread major diameter of the rotating body part 3 constituting the internal nut assembly is smaller than R2 on both sides, which can ensure that the major diameters of the threads of the rotating body part 3 constituting the internal nut assembly and the adjusting nut 4 are always in linear contact during rotation and axial movement, avoiding interference between the tapered threads of the rotating body part 3 constituting the internal nut assembly and the adjusting nut 4 on both sides, and a gap between the minor diameters of the threads of the two.

[0041] Preferably, the rotating body parts 3 constituting the inner nut assembly still have a gap between each other when they are in a tightly matched state with the bolt or stud.

[0042] Preferably, the conical surface A1 of the intermediate nut, the conical surface B1 of the rotating body part constituting the internal nut assembly, the tapered thread of the rotating body part constituting the internal nut assembly, and the tapered thread of the adjusting nut have the same taper.

[0043] Preferably, the outer contour edge of the retaining spring 7 does not have a conical surface, but is directly in force contact with the conical surface A2 on the middle nut 2 through its ridge line.

[0044] Preferably, the positive pressure between the intermediate nut 2 and the rotating body part 3 constituting the inner nut assembly can be controlled by controlling the cone angle of the conical surface between the two, so that when the wrench rotates the outer nut 1, the rotating body part 3 constituting the inner nut assembly and the bolt or stud do not rotate relative to each other.

[0045] Assemble the parts correctly according to their matching relationships.

[0046] When tightening is required, a quick composite nut is inserted into the bolt or stud to the surface of the workpiece to be tightened. The adjusting nut 4 is rotated, and the adjusting nut 4 pushes the rotating body part 3 constituting the inner nut assembly through the tapered thread, so that it moves synchronously along the conical surface A1 of the intermediate nut 2 toward the small end of the conical surface A1, so that the conical surface B1 of the rotating body part 3 constituting the inner nut assembly and the conical surface A1 of the intermediate nut 2 are fully in contact. The inner thread of the rotating body part 3 constituting the inner nut assembly is initially engaged with the outer thread on the bolt or stud. Use a wrench to turn the outer nut 1 clockwise, and the outer nut 1 and the intermediate nut 2 rotate relative to each other. The outer nut 1 forms a force on the intermediate nut 2, and further, the intermediate nut 2 forms a force on the rotating body part 3 constituting the inner nut assembly. Because the contact surface between the intermediate nut 2 and the rotating body part 3 constituting the inner nut assembly is a conical surface, the rotating body part 3 constituting the inner nut assembly has a tendency to move axially and contract radially. Due to the presence of bolts or studs at the position of the rotation axis, the two are further squeezed and engaged through the threaded pair to achieve a tightening effect.

[0047] When it is necessary to release the tightening, use a wrench to rotate the outer nut 1 counterclockwise, so that the force between the outer nut 1 and the intermediate nut 2, and between the intermediate nut 2 and the rotating body part 3 constituting the inner nut assembly is lost. At this time, the adjusting nut 4 is rotated in the opposite direction relative to the tightening process, and the adjusting nut 4 pulls the rotating body part 3 constituting the inner nut assembly through the tapered thread, so that it moves synchronously along the conical surface A1 of the intermediate nut 2 toward the large end of the conical surface A1, and the inner thread of the rotating body part 3 constituting the inner nut assembly no longer bites the outer thread on the bolt or stud, and the quick composite nut can be pulled out at this time.

[0048] Since a conical surface E1 is designed on the edge of one side of the outer contour of the retaining spring 7, and the conical surface E1 is in contact with the conical surface A2 on the intermediate nut 2, and the plane on the other side of the retaining spring 7 is in force contact with the plane C2 of the adjusting nut 4, the tension of the retaining spring 7 makes it tend to move along the conical surface A2 toward the larger end of the conical surface A2, but this tendency is blocked by the adjusting nut 4, so that the adjusting nut 4 always radially pushes the rotating body part 3 constituting the inner nut assembly, so that the rotating body part 3 constituting the inner nut assembly is in force contact with the intermediate nut 2. In order to ensure that this contact is more stable, the upper coil spring 6 and the lower coil spring 5 provide additional radial tension through the coil spring positioning groove of the rotating body part 3 constituting the inner nut assembly.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A quick compound nut, characterized in that: It includes an outer nut, an intermediate nut, a rotating body part constituting an inner nut assembly, an adjusting nut, and a retaining spring. The internal thread of the external nut cooperates with the external thread of the intermediate nut; One end of the intermediate nut has an external thread, and a conical surface A1 is designed on the inner side close to the external thread end, the small end of the conical surface A1 faces the external thread end of the intermediate nut, and a conical surface A2 is designed on the inner side of the intermediate nut away from the external thread end, the small end of the conical surface A2 is away from the external thread end of the intermediate nut and is cut off by the end face, and there is a cylindrical surface A3 between the conical surface A1 of the intermediate nut and the conical surface A2; The number of the rotating body parts constituting the internal nut assembly is two or more, the outer side of which is a conical surface B1 in contact with the conical surface A1 of the intermediate nut, the inner side of which is close to the small end of the conical surface B1 and is designed with an internal thread to achieve cooperation with the external thread of the bolt or stud, and the inner side of which is far away from the small end of the conical surface B1 and is designed with a conical thread, and the large end of the conical thread faces the large end of the conical surface B1; The cylindrical surface C1 formed by the middle protrusion on the outer side of the adjusting nut is in clearance with the cylindrical surface A3 of the intermediate nut, the outer side of one end is a tapered thread, and the tapered thread is in clearance with the tapered thread of the rotating body part constituting the inner nut assembly, and the other end is a protruding structure, and a plane C2 is naturally formed between the cylindrical surface C1 and the protruding structure, and a through hole is provided at the axis of the adjusting nut, and its inner diameter is in clearance with the major diameter of the bolt or stud thread; A conical surface E1 is designed on one edge of the outer contour of the retaining spring, and the conical surface E1 is force-contacted with the conical surface A2 on the middle nut, and the plane on the other side of the retaining spring is force-contacted with the plane C2 of the adjusting nut.

2. A quick composite nut according to claim 1, characterized in that: It also includes an upper coil spring and a lower coil spring. The rotating body part constituting the inner nut assembly is also designed with two coil spring positioning grooves, and the upper coil spring and the lower coil spring provide radial tension respectively, so that the rotating body part constituting the inner nut assembly is in force contact and fit with the conical surface A1 of the intermediate nut through the conical surface B1.

3. A quick composite nut according to claim 1, characterized in that: The outer contour of the outer nut is a regular polygonal structure, one end is a semi-open design, and its end surface forms an outer nut protruding structure outward to achieve contact with the fastened workpiece. There is a through hole at the axis, and its inner diameter is matched with the major diameter clearance of the bolt or stud thread. The other end is an open design. The adjusting nut protruding structure is a regular polygonal structure or a cylindrical structure. The intermediate nut thread surface has scale lines for warning the screwing length.

4. A quick composite nut according to claim 1, characterized in that: The internal thread of the external nut and the external thread of the intermediate nut are sawtooth threads, trapezoidal threads, rectangular threads or triangular threads.

5. The quick composite nut according to claim 1, characterized in that: The conical thread of the rotating body part constituting the internal nut assembly and the conical thread of the adjusting nut are left-handed rectangular conical threads.

6. A quick composite nut according to claim 1, characterized in that: The middle rotation radius R1 of the same radial section of the major diameter of the tapered thread of the rotating body part constituting the internal nut assembly is smaller than R2 on both sides, which can ensure that the major diameter of the thread of the rotating body part constituting the internal nut assembly is always in linear contact with the adjusting nut during rotation and axial movement, avoiding interference between the two sides of the tapered thread of the rotating body part constituting the internal nut assembly and the adjusting nut, and a gap between the minor diameters of the threads of the two.

7. The quick composite nut according to claim 1, characterized in that: The rotating body parts constituting the inner nut assembly still have gaps between each other when they are in a state of close fit with the bolt or stud.

8. The quick composite nut according to claim 1, characterized in that: The conical surface A1 of the intermediate nut, the conical surface B1 of the rotating body part constituting the internal nut assembly, the tapered thread of the rotating body part constituting the internal nut assembly, and the tapered thread of the adjusting nut have the same taper.

9. The quick composite nut according to claim 1, characterized in that: The outer contour edge of the retaining spring does not have a conical surface, but is directly in force contact and fit with the conical surface A2 on the intermediate nut through its ridge line.

10. A quick-acting composite nut according to any one of claims 1 to 9, characterized in that: The positive pressure between the intermediate nut and the rotating body part constituting the inner nut assembly can be controlled by controlling the cone angle of the cone surface between the intermediate nut and the rotating body part constituting the inner nut assembly, so that when the wrench rotates the outer nut, the rotating body part constituting the inner nut assembly and the bolt or stud do not rotate relative to each other.

Images