All -round axial force -increasing locking type precision nut

Abstract

The application discloses a kind of all-around axial force-increasing locking type precision nut, it includes nut body (1), half ring segment (5), top tight screw hole (8), top tight bolt (3), when precision nut is installed on the outer thread of screw shaft (7), top tight bolt (3) is toped on nut body (1) by twisting, half ring segment (5) bears the thrust torque of top tight bolt (3) to back, force two half ring segment (5) to close type deformation, make nut body (1) firmly fixed position on screw shaft (7), when further twist top tight bolt (3), nut body (1) is slightly displaced by reverse torque, realize to the axial force-increasing locking of nut body (1). Loosen top tight bolt (3), half ring segment (5) rebounds or twist loosening bolt (2), without knocking the concussion nut body (1) or screw shaft (7) and easily loosen.

Description

Technical Field

[0001] This invention is an all-around axial force-enhancing locking precision nut. When the nut is installed on a screw shaft, it can firmly lock the object on the screw shaft, thereby improving the locking efficiency and facilitating operation. Background Technology

[0002] The locking nut on the screw shaft is used to further tighten and secure the nut after it is fitted onto the screw shaft. Currently, it is commonly used to install bearings on the main shaft of positioning machines or on ball screws. To fix the locking nut to the shaft, the first traditional technique involves creating a threaded hole in the locking nut, filling the hole with a clamping block, and using a bolt screwed into the hole to push the clamping block, thus tightening the locking nut onto the shaft. The second technique involves creating a transverse annular groove on the inner wall of the nut, with an axial threaded hole extending into the groove. A bolt is then screwed into the threaded hole, causing deformation of the inner wall of the nut and tightening it onto the shaft. Scientists and engineers in many countries around the world have conducted extensive experiments and research, employing methods such as locking plates, pins, nylon inserts, and chemical adhesives, which have alleviated the time it takes for the locking nut to loosen on its own to some extent. However, these locking methods do not provide the locking nut with all-around axial force amplification and radial locking, failing to fundamentally solve the problem.

[0003] Meanwhile, technologies such as the nut disclosed in Chinese patent CN114060388A, the improved nut disclosed in CN1272554C, the precision nut disclosed in CN102562760B, the precision nut disclosed in CN102537000B, and the nut assembly disclosed in CN111219405A all have the following drawbacks:

[0004] 1. The axial or radial deformation of the nut is too small, resulting in limited locking force.

[0005] 2. When the locking pin or shaft inside the nut needs to be loosened to adjust the locking installation, external force is required to strike the nut and vibrate the locking pin or shaft to loosen the nut. This is unacceptable in precision installation processes.

[0006] 3. When the locking pin or shaft inside the nut performs the locking action, it will cause a slight displacement of the nut body, thereby reducing the preload torque of the nut body. Summary of the Invention

[0007] To overcome the above-mentioned shortcomings:

[0008] The first objective of this invention is to provide a precision nut that locks an object on a screw shaft by engaging and locking the inclined internal thread with the external thread of the screw shaft in all directions, and has axial force amplification and radial locking properties.

[0009] The second objective of this invention is to provide a precision nut that uses a tapered internal thread to engage and lock the object on the screw shaft in all directions, and has axial force amplification and radial locking capabilities.

[0010] The third objective of this invention is to provide a precision nut that uses an annular inner spiral boss to engage and lock the object on the screw shaft in all directions, and has axial force amplification and radial locking capabilities.

[0011] The fourth objective of this invention is to provide a locking nut that forces the internal thread of the inner and outer threaded sections of the nut body to fully engage and tighten with the external thread of the screw shaft to lock the object on the screw shaft, and a precision nut with axial force amplification and radial locking in all directions.

[0012] The fifth objective of this invention is to provide a locking nut that forces the annular inner helical boss to engage and tighten with the external thread of the shaft in all directions to lock the object on the screw shaft, and a precision nut with axial force amplification and radial locking in all directions.

[0013] The objective of this invention is achieved as follows:

[0014] The technical means to achieve the first objective of this invention is as follows: it includes: a nut body with an internal thread section, two L-shaped threaded semi-ring sections with inclined internal threads arranged axially at an angle and facing each other on one end face of the nut body, a first end face and a second end face perpendicular to the center of the nut body, a wrench hole or groove, and two or more tightening screw holes and tightening bolts that are perpendicularly penetrating the large-diameter end faces of the two L-shaped threaded semi-ring sections. The L-shaped threaded semi-ring section is connected to the second end face of the nut body through its small diameter body. The inclined internal thread is connected to the internal thread of the nut body. When the precision nut with all-round axial force-increasing locking is screwed onto the external thread of the cylindrical shaft, the tightening bolt is turned and pressed against the second end face of the nut body. The large diameter body of the L-shaped threaded semi-ring bears the reverse pushing torque of the tightening bolt, forcing the L-shaped threaded semi-ring to deform towards the center. This causes the inclined internal thread arranged in the center axis on the L-shaped threaded semi-ring to fully engage and tighten with the external thread of the cylindrical screw shaft. When the tightening bolt is further turned, the nut body is subjected to the reverse torque of the deformed L-shaped threaded semi-ring and moves slightly towards the first end face, thus achieving axial force-increasing locking of the nut body with the internal thread section.

[0015] The technical means to achieve the second objective of this invention is as follows: it includes: a nut body with an internal thread section, and two L-shaped threaded semi-circular sections with axially arranged tapered internal threads arranged opposite each other on one end face of the nut body, internal threads arranged axially along the center hole of the nut body, a first end face and a second end face perpendicular to the center line of the nut body, a wrench hole or groove, and two or more tightening screw holes perpendicularly penetrating the large-diameter end faces of the two L-shaped threaded semi-circular sections, and a tightening bolt. The L-shaped threaded semi-circular sections are connected to the second end face of the nut body through their small-diameter bodies. The pitch of the tapered internal threads is equal to that of the nut body. When the precision nut with internal thread connection and all-round axial force-increasing locking is installed on the external thread of the cylindrical shaft, the tightening bolt is turned and pressed against the second end face of the nut body. The large-diameter body of the L-shaped threaded semi-ring bears the reverse pushing torque of the tightening bolt, forcing the L-shaped threaded semi-ring to deform towards the center. This causes the tapered internal thread arranged axially on the L-shaped threaded semi-ring to fully engage and tighten with the external thread of the cylindrical screw shaft. When the tightening bolt is further turned, the nut body is subjected to the reverse torque of the deformed L-shaped threaded semi-ring and shifts slightly towards the first end face, achieving axial force-increasing locking of the nut body with internal thread section.

[0016] The technical means to achieve the third objective of this invention is as follows: It includes: a nut body with an internal thread section; two L-shaped semi-circular sections with radially arranged annular internal spiral bosses arranged opposite each other on one end face of the nut body; an internal thread arranged axially along the center hole of the nut body; a first end face and a second end face perpendicular to the center of the nut body; a wrench hole or groove; and two or more tightening screw holes and tightening bolts that are perpendicularly penetrating the large-diameter end faces of the two L-shaped annular internal spiral boss semi-circular sections respectively. The L-shaped annular internal spiral boss semi-circular sections are connected to the second end face of the nut body by their small-diameter bodies. The diameter of the annular internal spiral boss is larger than the large diameter of the internal thread of the nut body. There is an annular groove between the annular internal spiral boss and the internal thread of the nut body. When the axial force-enhancing locking precision nut is screwed onto the external thread of a cylindrical shaft, the tightening bolt is turned and presses against the second end face of the nut body. The large-diameter body of the L-shaped annular inner spiral boss half-ring bears the reverse pushing torque of the tightening bolt, forcing the L-shaped annular inner spiral boss half-ring to deform towards the center. This causes the annular inner spiral boss, axially arranged at the center of the L-shaped annular inner spiral boss half-ring body, to fully engage and tighten with the external thread of the cylindrical screw shaft. When the tightening bolt is further turned, the nut body is subjected to the reverse torque of the deformed L-shaped annular inner spiral boss half-ring and displaces slightly towards the first end face, achieving axial force-enhancing locking of the nut body with the internal thread section. Furthermore, its annular inner spiral boss can have any of the following structures:

[0017] a) The inner spiral bosses of the ring can be arranged in odd or even numbers;

[0018] b) The annular inner spiral boss has an axial slope or taper arrangement.

[0019] The technical means to achieve the fourth objective of this invention is as follows: it includes: a nut body with an internal thread section, two threaded semi-circular sections arranged opposite each other on one end face of the nut body, both having internal and external threads arranged coaxially, a first end face and a second end face perpendicular to the center of the nut body, a wrench hole or groove, a locking nut arranged on the external thread section of the threaded semi-circular section, two or more tightening screw holes perpendicularly penetrating the end face of the locking nut, and a tightening bolt. The outer diameter of the external thread of the threaded semi-circular section is smaller than the outer diameter of the nut body. When the omnidirectional axial force-enhancing locking precision nut is twisted and mounted on a cylindrical shaft... When the screw is turned on the external thread of the rod, the locking nut is tightened by the tightening bolt against the second end face of the nut body. The locking nut is subjected to the reverse pushing torque of the tightening bolt, which forces the locking nut to deform the threaded half-ring section towards the center, so that the internal thread of the threaded half-ring section engages and hugs the external thread of the shaft in all directions. When the tightening bolt is further turned, the internal threaded section of the nut body is subjected to the reverse torque of the deformed threaded half-ring section and displaces slightly towards the first end face, thereby achieving axial force-increasing locking of the nut body with the internal threaded section. Furthermore, the threads of its internal and external threaded sections can have any of the following combinations:

[0020] a) Arrangement of cylindrical threads and inclined threads;

[0021] b) Arrangement of cylindrical thread and tapered thread;

[0022] c) Arrangement of cylindrical threads combined with cylindrical threads;

[0023] d) Arrangement of beveled threads combined with beveled threads;

[0024] e) Arrangement of tapered threads combined with tapered threads;

[0025] f) Arrangement of combined inclined plane threads and tapered threads;

[0026] Furthermore, the internal thread of the locking nut and the external thread of the threaded half-ring section are fitted differently.

[0027] The technical means to achieve the fifth objective of this invention is as follows: it includes: a nut body with an internal thread section; two threaded semi-circular sections arranged coaxially on one end face of the nut body, each having an external thread and an annular internal helical boss; a first end face and a second end face perpendicular to the center of the nut body; a wrench hole or groove; a locking nut arranged on the external thread section of the threaded semi-circular section; two or more tightening screw holes perpendicularly penetrating the end face of the locking nut; and a tightening bolt. The outer diameter of the threaded semi-circular section is smaller than the outer diameter of the nut body. The threaded semi-circular section is integrally connected to the second end face of the nut body. The diameter of the annular internal helical boss is larger than the major diameter of the internal thread of the nut body. The annular internal helical boss and the internal thread of the nut body are... With an annular groove spacing, when the omnidirectional axial force-enhancing locking precision nut is twisted and installed on the external thread of the cylindrical shaft, the tightening bolt on the locking nut is turned and pressed against the second end face of the nut body. The locking nut is subjected to the reverse pushing torque of the tightening bolt, which forces the locking nut to deform the threaded semi-annular section towards the center, so that the annular inner helical boss of the inner and outer threaded sections of the nut body is fully engaged and tightly gripped with the external thread of the cylindrical screw shaft. When the tightening bolt is further turned, the inner threaded section of the nut body is subjected to the reverse torque of the deformed threaded semi-annular section and displaces slightly towards the first end face, realizing the axial force-enhancing locking of the nut body with the inner threaded section; furthermore, its threaded semi-annular section has any of the following combinations:

[0028] a) Arrangement of cylindrical thread and annular internal spiral boss;

[0029] b) A combination of tapered threads and annular inner spiral bosses;

[0030] c) A combination of inclined thread and annular inner spiral boss;

[0031] Furthermore, the internal thread of the locking nut and the external thread of the threaded half-ring section are fitted differently.

[0032] Further technical means to achieve the objective of this invention are:

[0033] Furthermore, the omnidirectional axial force-enhancing locking precision nut further includes one or more loosening screw holes arranged perpendicular to the second end face on the end face of the nut body, a loosening bolt hole arranged axially with the loosening screw hole on the end face of the large diameter body of the L-shaped threaded semi-ring body or the end face of the locking nut, and a loosening bolt arranged concentrically with the loosening bolt hole and the loosening screw hole.

[0034] Furthermore, the all-around axial force-enhancing locking precision nut further includes a material different from the nut body arranged in the semi-ring section to enhance the all-around engagement and clamping torque between the semi-ring section and the external thread of the shaft.

[0035] Furthermore, the omnidirectional axial force-enhancing locking precision nut further includes a wall thickness of less than 5 mm at the connection between the semi-circular section and the second end face of the nut body.

[0036] Furthermore, the omnidirectional axial force-enhancing locking precision nut further includes an annular groove spaced between the thread of the semi-circular section and the thread of the nut body.

[0037] The precision nut with all-around axial force-increasing locking provided by the present invention achieves the purpose of increasing axial force and radial locking through the above structure, thereby improving the locking performance and allowing for easy loosening. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the basic structure of the present invention and its application on a screw shaft;

[0039] Figure 2 for Figure 1 The center section view in;

[0040] Figure 3 Figure 4 This is a basic structural and cross-sectional view of the first embodiment of the present invention.

[0041] Figure 5 Figure 6 This is the basic structure and cross-sectional view of the second embodiment of the present invention.

[0042] Figure 7 Figure 8 This is the basic structure and cross-sectional view of the third embodiment of the present invention.

[0043] Figure 9 Figure 10 This is the basic structure and cross-sectional view of the fourth embodiment of the present invention.

[0044] Figure 11 Figure 12 This is the basic structure and cross-sectional view of the fifth embodiment of the present invention.

[0045] Figures 3-12 In the picture:

[0046] 1- Nut body; 2- Loosening bolt; 1-1 First end face; 1-2- Second end face; 3- Tightening bolt; 4- Wrench hole; 5- L-shaped threaded semi-circular section; 6- Loosening bolt hole; 7- Inclined internal thread or tapered internal thread or internal helical boss or threaded semi-circular section; 8- Tightening bolt hole; 9- Annular groove; 10- External thread; 11- Helical boss; a- Inclined angle or taper; b- Threaded section; d- Wall thickness; e- Small diameter body; f- Nut center. Implementation

[0047] 1. A first specific embodiment of the present invention

[0048] Please refer to the following: Figure 3 Figure 4As shown, a specific embodiment that achieves the first objective of the present invention is designed to include a nut body 1 with an internal thread section b, and two L-shaped threaded semi-ring sections 5 with inclined internal threads 7 arranged axially at an angle α on opposite sides of one end face of the nut body 1, a first end face 1-1 and a second end face 1-2 perpendicular to the center of the nut body, a wrench hole 4 or groove, and two or more tightening screw holes 8 and tightening bolts 3 that are perpendicularly penetrating the large-diameter end faces of the two L-shaped threaded semi-ring sections 5. The L-shaped threaded semi-ring sections 5 are connected to the second end face 1-2 of the nut body 1 by their small-diameter bodies e. The inclined internal threads 7 are integrated with the internal threads of the nut body 1. When the precision nut with omnidirectional axial force-increasing locking is installed on the external thread of the cylindrical shaft, the tightening bolt 3 is turned and pressed against the second end face 1-2 of the nut body 1. The large-diameter body of the L-shaped threaded half-ring 5 bears the reverse pushing torque of the tightening bolt 3, forcing the L-shaped threaded half-ring 5 to deform towards the center f, so that the inclined internal thread 7 arranged in the center axis on the body of the L-shaped threaded half-ring 5 is fully engaged and tightly hugged with the external thread of the shaft. When the tightening bolt 3 is further turned, the nut body 1 is subjected to the reverse torque of the deformed L-shaped threaded half-ring 5 and moves slightly towards the first end face 1-1, realizing the axial force-increasing locking of the nut body 1 with the internal thread section b.

[0049] 2. A second specific embodiment of the present invention

[0050] Please refer to the following: Figure 5 Figure 6 As shown, a specific embodiment achieving the second objective of the present invention is designed as follows: a nut body 1 with an internal thread section b, and two L-shaped threaded semi-circular sections 5 with tapered internal threads 7 arranged axially and facing each other on one end face of the nut body 1, internal threads arranged axially along the center hole of the nut body 1, a first end face 1-1 and a second end face 1-2 perpendicular to the center line of the nut body 1, a wrench hole 4 or groove, and two or more tightening screw holes 8 and tightening bolts 3 perpendicularly penetrating the large-diameter end faces of the two L-shaped threaded semi-circular sections 5 respectively. The L-shaped threaded semi-circular sections 5 are connected to the second end face 1-2 of the nut body by their small-diameter bodies e. The tapered internal threads... 7. The pitch is connected to the internal thread of the nut body 1. When the all-round axial force-increasing locking precision nut is twisted and installed on the external thread of the cylindrical shaft, the tightening bolt 3 is twisted and pressed against the second end face 1-2 of the nut body 1. The large diameter body of the L-shaped threaded half ring 5 bears the reverse pushing torque of the tightening bolt 3, which forces the L-shaped threaded half ring to deform towards the center f in a constricted manner. This causes the tapered internal thread 7 arranged in the center axis on the L-shaped threaded half ring 5 to fully engage and hug the external thread of the shaft. When the tightening bolt 3 is further twisted, the nut body 1 is subjected to the reverse torque of the deformed L-shaped threaded half ring 5 and moves slightly towards the first end face 1-1, thereby achieving axial force-increasing locking of the nut body 1 with the internal thread section b.

[0051] 3. The third specific embodiment of the present invention

[0052] Please refer to the following: Figure 7 Figure 8 As shown, a specific embodiment achieving the third objective of the present invention comprises a nut body 1 with an internal thread section b, two L-shaped radially arranged annular internal spiral bosses 7 semi-circular sections 5 facing each other on one end face of the nut body 1, an internal thread arranged axially along the center hole of the nut body 1, a first end face 1-1 and a second end face 1-2 perpendicular to the center of the nut body 1, a wrench hole 4 or groove, and two or more tightening screw holes 8 and tightening bolts 3 vertically penetrating the large-diameter end faces of the two L-shaped annular internal spiral bosses 7 semi-circular sections 5 respectively. The L-shaped annular internal spiral bosses 7 semi-circular sections 5 are connected to the second end face 1-2 of the nut body 1 by their small-diameter bodies e. The diameter of the annular internal spiral bosses 7 is larger than the large diameter of the internal thread of the nut body 1. The annular groove between the nut body 1 and the internal thread allows the precision nut with omnidirectional axial force-increasing locking to be installed on the external thread of the cylindrical shaft. When the nut body 1 is tightened, the tightening bolt 3 is pressed against the second end face 1-2 of the nut body 1. The large diameter body of the L-shaped annular inner spiral boss 7 half ring 5 bears the reverse pushing torque of the tightening bolt 3, forcing the L-shaped annular inner spiral boss half ring 5 to deform towards the center f. This causes the annular inner spiral boss 7, which is axially arranged on the body of the L-shaped annular inner spiral boss half ring 5, to mesh and hold tightly with the external thread of the shaft in all directions. When the tightening bolt 3 is further tightened, the nut body 1 is subjected to the reverse torque of the deformed L-shaped annular inner spiral boss half ring 5 and moves slightly towards the first end face 1-1, thereby achieving axial force-increasing locking of the nut body 1 with the internal thread section b.

[0053] Furthermore, its annular inner spiral boss 7 can have any of the following structures:

[0054] a) The annular inner spiral bosses 7 are arranged axially in odd or even numbers;

[0055] b) The annular inner spiral boss 7 is arranged with an axial slope or taper a.

[0056] 4. The fourth specific embodiment of the present invention

[0057] Please refer to the following: Figure 9 Figure 10As shown, a specific embodiment achieving the fourth objective of this invention comprises a nut body 1 with an internal threaded section b, two threaded semi-ring sections 7 arranged coaxially with internal and external threads facing each other on one end face of the nut body 1, a first end face 1-1 and a second end face 1-2 perpendicular to the center of the nut body 1, a wrench hole 4 or groove, a locking nut 5 arranged on the external threaded section of the threaded semi-ring 7, two or more tightening screw holes 8 perpendicularly penetrating the end face of the locking nut 5, and a tightening bolt 3. The outer diameter of the external thread of the threaded semi-ring section 7 is smaller than the outer diameter of the nut body 1. When the omnidirectional axial force-enhancing locking precision nut is twisted and installed on the cylindrical shaft... When the locking nut 5 is tightened onto the external thread, the tightening bolt 3 on the locking nut 5 presses against the second end face 1-2 of the nut body 1. The locking nut 5 bears the reverse pushing torque of the tightening bolt 3, forcing the locking nut 5 to deform the threaded semi-circular section 7 towards the center f, so that the internal thread of the threaded semi-circular section 7 fully engages and clamps with the external thread of the shaft. When the tightening bolt is further tightened, the internal threaded section b of the nut body 1 is subjected to the reverse torque of the deformed threaded semi-circular section 7 and displaces slightly towards the first end face 1-1, thereby achieving axial force-increasing locking of the nut body 1 with the internal threaded section b. Furthermore, the threads of the internal and external threaded semi-circular section 7 can have any of the following combinations:

[0058] a) Arrangement of cylindrical threads and inclined threads;

[0059] b) Arrangement of cylindrical thread and tapered thread;

[0060] c) Arrangement of cylindrical threads combined with cylindrical threads;

[0061] d) Arrangement of beveled threads combined with beveled threads;

[0062] e) Arrangement of tapered threads combined with tapered threads;

[0063] f) Arrangement of combined inclined plane threads and tapered threads;

[0064] Furthermore, the internal thread of the locking nut 5 and the external thread of the threaded semi-circular section 7 are adapted to fit together.

[0065] 5. The fifth specific embodiment of the present invention

[0066] Please refer to the following: Figure 11 Figure 12A specific embodiment achieving the fifth objective of this invention comprises a nut body 1 with an internal threaded section b, and two threaded semi-circular sections 7 arranged coaxially on one end face of the nut body 1, each having an external thread 10 and an annular internal spiral boss 11. It also includes a first end face 1-1 and a second end face 1-2 perpendicular to the center of the nut body 1, a wrench hole 4 or groove, a locking nut 5 arranged on the external thread of the threaded semi-circular section 7, two or more tightening screw holes 8 perpendicularly penetrating the end face of the locking nut 5, and a tightening bolt 3. The outer diameter of the threaded semi-circular section 7 is smaller than the outer diameter of the nut body. The threaded semi-circular section 7 is integrally connected to the second end face 1-2 of the nut body 1. The diameter of the annular internal spiral boss 11 is larger than the major diameter of the internal thread of the nut body 1. The annular internal spiral boss 11 and the screw... The annular grooves 9 between the internal threads of the main body 1 are spaced apart. When the precision nut with omnidirectional axial force-increasing locking type is twisted and installed on the external thread of the cylindrical shaft, the tightening bolt 3 on the locking nut 5 is twisted and pressed against the second end face 1-2 of the nut body 1. The locking nut 5 is subjected to the reverse pushing torque of the tightening bolt 3, which forces the locking nut 5 to deform the threaded half-ring section 7 towards the center f in a converging manner. This causes the annular inner spiral boss 11 of the inner and outer threaded sections 7 of the nut body 1 to engage and tighten with the external thread of the shaft in all directions. When the tightening bolt 3 is twisted further, the inner threaded section b of the nut body 1 is subjected to the reverse torque of the deformed threaded half-ring section 7 and is slightly displaced towards the first end face 1-1, thereby achieving axial force-increasing locking of the inner threaded section of the nut body. Furthermore, the threaded half-ring section 7 has any of the following combinations:

[0067] a) Arrangement of cylindrical thread and annular internal spiral boss;

[0068] b) A combination of tapered threads and annular inner spiral bosses;

[0069] c) A combination of inclined thread and annular inner spiral boss;

[0070] Furthermore, the internal thread of the locking nut 5 and the external thread of the threaded semi-circular section 7 are adapted to fit together.

[0071] 6. Further designs of the present invention can be seen in conjunction with the following: Figures 3-12 :

[0072] a) Regardless of the first to fifth specific embodiments, it further includes arranging other materials different from the nut body 1 in the threaded semi-circular section 5 or 7 to enhance the all-round engagement and clamping torque between the threaded semi-circular section 5 or 7 and the external thread of the shaft.

[0073] b) Regardless of the first to fifth specific embodiments, it further includes a wall thickness d of less than 5 mm at the connection between the threaded semi-circular section 5 or 7 and the second end face 1-2 of the nut body 1.

[0074] C) Regardless of the first to fifth specific embodiments, it further includes an annular groove spaced at the threaded connection between the threaded half-ring section 5 or 7 and the threaded connection of the nut body 1.

[0075] 6. Implementation of the present invention

[0076] Please refer to Figure 1. Figure 2 Regardless of the first to fifth specific embodiments of the present invention, during operation, the user first screws the omnidirectional axial force-enhancing locking precision nut body 1 onto the shaft 7, so that the body 1 effectively fits against the workpiece 6 to be positioned. When operating to fit the nut body 1 against the workpiece 6 to be positioned, a force-applying tool can be inserted into the wrench hole 4 to rotate the nut body 1, depending on the work requirements. Then, the tool is used to twist the tightening bolt 3 on the locking nut 5, which presses against the second end face 1-2 of the nut body 1. The large-diameter body of the L-shaped threaded semi-ring 5 bears the reverse pushing torque of the tightening bolt 3, forcing the L-shaped threaded semi-ring 5 to deform towards the center f, so that the internal thread on the L-shaped threaded semi-ring 5 fully engages and clamps with the external thread of the shaft, thereby effectively fixing the nut body 1 onto the shaft 7; further... When the tightening bolt 3 is turned, the nut body 1 is subjected to the reverse torque of the deformed L-shaped threaded half ring 5 and is slightly displaced in the direction of the first end face 1-1, thereby achieving axial force increase and locking of the workpiece 6. When it is necessary to replace the loose precision nut, first loosen the tightening bolt 3 to remove the tightening torque. The two L-shaped threaded half rings 5 ​​spring back and disengage and fully engage with the external thread of the shaft. Further, the loosening bolt 2 can be tightened to increase the interval between the L-shaped threaded half ring 5 and the external thread of the shaft, so that the precision nut can be loosened very easily without knocking or vibrating the nut or shaft.

[0077] 7. Conclusion

[0078] Therefore, based on the above specific embodiments, the present invention can be summarized as having the following advantages:

[0079] 1. The precision nut of the present invention has a larger space in the locking part of the screw thread, providing more deformation for the nut. At the same time, it consists of two semi-rings. The torque of the tightening bolt gives the semi-rings an all-round locking function, which can stably and firmly lock the object on the screw shaft, greatly increasing the ease of use.

[0080] 2. The precision nut of the present invention, when the semi-ring is locked on the screw, when the tightening bolt is further turned, the nut body is subjected to the reverse torque of the deformed semi-ring and the slight displacement has an all-round axial force amplification function, which can greatly increase the pre-tightening torque of the locked object on the screw shaft, and is convenient to operate and use.

[0081] 3. When the precision nut of the present invention needs to be loosened, it is only necessary to loosen the tightening bolt to make the semi-ring spring back or tighten the loosening bolt to make the semi-ring open, so that the precision nut can be loosened very easily without knocking or vibrating the nut or shaft.

[0082] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention. They should not be used to limit the scope of protection of the present invention. All equivalent changes or substitutions made according to part or all of the technical features of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A precision nut with omnidirectional axial force-enhancing locking mechanism, characterized in that: include: The nut body has an internally threaded section, and two L-shaped threaded semi-circular sections with axially arranged inclined internal threads at an angle arranged opposite each other on one end face of the nut body. It also includes a first end face and a second end face perpendicular to the center of the nut body, a wrench hole or groove, and two or more tightening screw holes perpendicularly penetrating the large-diameter end faces of the two L-shaped threaded semi-circular sections, along with tightening bolts. The L-shaped threaded semi-circular sections are connected to the second end face of the nut body via their small-diameter sections. The inclined internal threads are connected to the internal threads of the nut body. When the omnidirectional axial force-increasing lock... When the tight-fitting precision nut is screwed onto the external thread of the cylindrical shaft, the tightening bolt is turned and pressed against the second end face of the nut body. The large-diameter body of the L-shaped threaded semi-ring bears the reverse pushing torque of the tightening bolt, forcing the L-shaped threaded semi-ring to deform towards the center. This causes the inclined internal thread arranged axially on the center of the L-shaped threaded semi-ring to fully engage and tighten with the external thread of the shaft. When the tightening bolt is further turned, the nut body is subjected to the reverse torque of the deformed L-shaped threaded semi-ring and shifts slightly towards the first end face, thus achieving axial force-increasing locking of the nut body with the internal thread section.

2. A precision nut with omnidirectional axial force-enhancing locking mechanism, characterized in that: include: The nut body has an internally threaded section, and two L-shaped threaded semi-ring sections with tapered internal threads arranged axially on one end face of the nut body, internal threads arranged axially along the center hole of the nut body, a first end face and a second end face perpendicular to the center line of the nut body, a wrench hole or groove, and two or more tightening screw holes perpendicularly penetrating the large-diameter end faces of the two L-shaped threaded semi-ring sections, and a tightening bolt. The L-shaped threaded semi-ring sections are connected to the second end face of the nut body through their small-diameter sections. The pitch of the tapered internal threads is connected to the internal threads of the nut body. When the omnidirectional axial force-enhancing locking precision nut is screwed onto the external thread of the cylindrical shaft, the tightening bolt is turned and pressed against the second end face of the nut body. The large-diameter body of the L-shaped threaded semi-ring bears the reverse pushing torque of the tightening bolt, forcing the L-shaped threaded semi-ring to deform towards the center. This causes the tapered internal thread arranged axially on the L-shaped threaded semi-ring to fully engage and tighten with the external thread of the shaft. When the tightening bolt is further turned, the nut body is subjected to the reverse torque of the deformed L-shaped threaded semi-ring and shifts slightly towards the first end face, thus achieving axial force-enhancing locking of the nut body with the internal thread section.

3. A precision nut with omnidirectional axial force-enhancing locking mechanism, characterized in that: include: The nut body includes an internally threaded section and two L-shaped semi-circular sections with radially arranged annular internal spiral bosses arranged opposite each other on one end face of the nut body. The internal thread is axially arranged along the center hole of the nut body. A first end face and a second end face are perpendicular to the center of the nut body. A wrench hole or groove is provided, and two or more tightening screw holes and tightening bolts are vertically penetrating the large-diameter end faces of the two L-shaped annular internal spiral boss semi-circular sections. The L-shaped annular internal spiral boss semi-circular sections are connected to the second end face of the nut body through their small-diameter sections. The diameter of the annular internal spiral boss is larger than the large diameter of the internal thread of the nut body. An annular groove is spaced between the annular internal spiral boss and the internal thread of the nut body. When the entire... When the axial force-enhancing locking precision nut is screwed onto the external thread of a cylindrical shaft, the tightening bolt is turned and presses against the second end face of the nut body. The large-diameter body of the L-shaped annular inner spiral boss half-ring bears the reverse pushing torque of the tightening bolt, forcing the L-shaped annular inner spiral boss half-ring to deform towards the center. This causes the annular inner spiral boss, axially arranged at the center of the L-shaped annular inner spiral boss half-ring, to fully engage and tighten with the external thread of the shaft. When the tightening bolt is further turned, the nut body is subjected to the reverse torque of the deformed L-shaped annular inner spiral boss half-ring and displaces slightly towards the first end face, achieving axial force-enhancing locking of the nut body with the internal thread section. The annular inner spiral boss can have any of the following structures: a) The inner spiral bosses of the ring can be arranged in odd or even numbers; b) The annular inner spiral boss has an axial slope or taper arrangement.

4. A precision nut with omnidirectional axial force-enhancing locking mechanism, characterized in that: include: The nut body comprises an internally threaded section, two coaxially arranged threaded semi-ring sections with both internal and external threads facing each other on one end face of the nut body, a first end face and a second end face perpendicular to the center of the nut body, a wrench hole or groove, a locking nut arranged on the externally threaded section of the threaded semi-ring section, two or more tightening screw holes perpendicularly penetrating the end face of the locking nut, and a tightening bolt. The outer diameter of the external thread of the threaded semi-ring section is smaller than the outer diameter of the nut body. When the omnidirectional axial force-enhancing locking precision nut is screwed onto the external thread of a cylindrical shaft... When the locking nut is tightened, the tightening bolt presses against the second end face of the nut body. The locking nut bears the reverse pushing torque of the tightening bolt, forcing the locking nut to deform the threaded semi-circular section towards the center, causing the internal thread of the threaded semi-circular section to fully engage and tighten with the external thread of the shaft. When the tightening bolt is further tightened, the internal threaded section of the nut body is subjected to the reverse torque of the deformed threaded semi-circular section and displaces slightly towards the first end face, achieving axial force-increasing locking of the nut body with the internal threaded section. The threads of the internal and external threaded sections can have any of the following combinations: a) Arrangement of cylindrical threads and inclined threads; b) Arrangement of cylindrical thread and tapered thread; c) Cylindrical threads are arranged together with cylindrical threads; d) Arrangement of beveled threads combined with beveled threads; e) Arrangement of tapered threads combined with tapered threads; f) Arrangement of combined inclined plane threads and tapered threads; The internal thread of the locking nut and the external thread of the threaded half-ring section are fitted together in a different way.

5. A precision nut with omnidirectional axial force-enhancing locking mechanism, characterized in that: include: The nut body includes an internally threaded section and two threaded semi-circular sections arranged coaxially on one end face of the nut body, each having external threads and an annular internal helical boss. A first end face and a second end face are perpendicular to the center of the nut body. A wrench hole or groove is provided. A locking nut is located on the externally threaded section of the threaded semi-circular section. Two or more tightening screw holes and a tightening bolt are perpendicularly penetrating the end face of the locking nut. The outer diameter of the threaded semi-circular section is smaller than the outer diameter of the nut body. The threaded semi-circular section is integrally connected to the second end face of the nut body. The diameter of the annular internal helical boss is larger than the major diameter of the internal thread of the nut body. An annular groove exists between the annular internal helical boss and the internal thread of the nut body. When the omnidirectional axial force-enhancing locking precision nut is screwed onto the external thread of the cylindrical shaft, the tightening bolt on the locking nut is turned and presses against the second end face of the nut body. The locking nut bears the reverse pushing torque of the tightening bolt, forcing the locking nut to deform the threaded semi-circular section towards the center, so that the annular inner spiral boss of the inner and outer threaded sections of the nut body fully engages and hugs the external thread of the shaft. When the tightening bolt is further turned, the inner threaded section of the nut body is subjected to the reverse torque of the deformed threaded semi-circular section and displaces slightly towards the first end face, realizing axial force-enhancing locking of the nut body with the inner threaded section. The threaded semi-circular section can be any of the following combinations: a) Arrangement of cylindrical thread and annular internal spiral boss; b) A combination of tapered threads and annular inner spiral bosses; c) A combination of inclined thread and annular inner spiral boss; The internal thread of the locking nut and the external thread of the threaded half-ring section are fitted together in a different way.

6. The omnidirectional axial force-enhancing locking precision nut according to claim 1, 2, 3, 4, or 5, characterized in that: It also includes a loosening screw hole that is perpendicular to the second end face on the end face of the nut body, a loosening bolt hole that is coaxially arranged with the loosening screw hole on the end face of the large diameter body of the L-shaped threaded semi-ring body or the end face of the locking nut, and a loosening bolt that is concentrically arranged with the loosening bolt hole and the loosening screw hole.

7. The omnidirectional axial force-enhancing locking precision nut according to claim 1, 2, 3, 4, or 5, characterized in that: Furthermore, it includes arranging other materials different from the nut body inside the semi-ring section to enhance the all-round meshing and clamping torque between the semi-ring section and the external thread of the shaft.

8. The omnidirectional axial force-enhancing locking precision nut according to claim 1, 2, 3, 4, or 5, characterized in that: Furthermore, the wall thickness at the connection between the semi-circular section and the second end face of the nut body is less than 5 mm.

9. The omnidirectional axial force-enhancing locking precision nut according to claim 1, 2, 3, 4, or 5, characterized in that: It also includes an annular groove spacing at the thread connection between the thread in the semi-circular section and the thread in the nut body.

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