Locking nut and machining equipment

Abstract

The utility model provides a locking nut and processing equipment, a plurality of corner parts are distributed on the radial outer side of the locking nut, corner parts are formed between the adjacent corner parts in the circumferential direction of the locking nut, one side in the axial direction of the locking nut extends inwards in the radial direction of the locking nut to form a plurality of deformation parts, and the deformation parts extend inwards in the radial direction of the locking nut. The deformation parts are distributed at intervals in the circumferential direction of the locking nut, retaining parts are arranged between the adjacent deformation parts in the circumferential direction of the locking nut, and the curvature of the retaining parts is the same as the curvature of any position in the axial direction of the locking nut; and the radial size of the deformation part is gradually reduced in a manner of being close to the center of the deformation part. The locking nut and the machining equipment can be made of all-metal materials, the situation that the working temperature of nylon is limited is avoided, the application range is wider, the threaded face, corresponding to the deformation part, of the locking nut is integrally deformed, and it is guaranteed that threads are not prone to being seized in the installation process of the locking nut.

Description

Technical Field

[0001] The utility model relates to the technical field of lock nuts, in particular to a lock nut and processing equipment. Background Art

[0002] Some nut products require that they must have an anti-loosening function during use. The usual practices are: one is the conventional nut locking method: adding a locking process during the production process, that is, using mechanical external force to apply three points on the end face of the nut to form three protruding points inside the thread, and using these three points to achieve the locking function of the nut; the other is to add a nylon ring to the thread: that is, adding a nylon ring to the thread of the nut to achieve the purpose of anti-loosening during use.

[0003] However, the above locking nut has the following defects during use:

[0004] The method of applying mechanical external force at three points on the outer circle of the nut to deform the thread is small in size and mainly concentrated at these three points, which may cause the thread to be stuck before it is screwed to the bottom. The smaller deformation area is locally subjected to greater pressure during installation and tightening. Once the nut is removed, the nut is likely to lose its re-locking function when it is reinstalled.

[0005] When the method of adding a nylon ring is adopted, the temperature of the nylon ring is limited, that is, when the operating temperature exceeds 100°C, it cannot play a locking role and the scope of application is limited.

[0006] Therefore, in order to solve the above problems, the utility model proposes a locking nut and processing equipment that has a wide temperature application range, can avoid thread seizure, and is easy to reuse. Utility Model Content

[0007] In order to solve the problems that the existing locking nuts made of nylon material have a small temperature application range, a small deformation size that easily causes the threads to be stuck, and are inconvenient to reuse, the utility model provides a locking nut and processing equipment.

[0008] According to one object of the present invention, the present invention provides a locking nut, wherein a plurality of corner portions are distributed radially outwardly of the locking nut, an inter-corner portion is formed between the corner portions adjacent to each other in the circumferential direction of the locking nut, a plurality of deformation portions are formed on one side of the locking nut in the axial direction and extend radially inwardly along the locking nut, the deformation portions are distributed at intervals along the circumference of the locking nut, a retaining portion is provided between adjacent deformation portions in the circumferential direction of the locking nut, and the curvature of the retaining portion is the same as the curvature of any point in the axial direction of the locking nut;

[0009] The radial dimension of the deformation portion gradually decreases as it approaches the center of the deformation portion. In the circumferential direction of the locking nut, the dimension of the deformation portion is much larger than the dimension of the retaining portion.

[0010] Preferably, the deformation parts are arranged at equal intervals around the circumference of the locking nut, the number of the deformation parts is an odd number, and the number of the deformation parts is not less than 3.

[0011] Preferably, the number of the corner portions is a multiple of 3, and the deformation portions are arranged corresponding to the inter-corner portions.

[0012] Preferably, the number of the corner portions is 12, the number of the deformation portions is 3, and adjacent deformation portions are evenly spaced at 120° in the circumferential direction of the locking nut, and the retaining portion is located at the center of two adjacent deformation portions.

[0013] Preferably, thinning grooves formed by cutting are provided on the inner side and / or outer side of the corresponding deformation portion of the locking nut, and the thinning grooves are arranged along the circumference of the locking nut.

[0014] Preferably, the two axial ends of the locking nut are respectively a first end and a second end, the locking nut includes a first portion and a second portion extending between the first end and the second end, the deformation portion is arranged at the first end of the locking nut, the corner portion is arranged on the radial outside of the first portion, and the radial outside of the second portion extends outward to form a flange.

[0015] Preferably, the flange includes a first flange portion and a second flange portion, and in the axial direction of the locking nut, the corner portion, the first flange portion and the second flange portion are connected in sequence, wherein the radial dimension of the first flange portion gradually increases as it approaches the second flange portion, the radial outer side of the first flange portion close to the first end is flush with the radial outer side of the corner portion, and the radial outer side of the first flange portion close to the second end is flush with the radial outer side of the second flange portion.

[0016] Preferably, in the axial direction of the locking nut, the size of the deformation portion is 0.20mm-0.80mm.

[0017] The present utility model also provides a processing device, including the above-mentioned locking nut, the corner portion is a groove structure, and the processing equipment also includes a locking clamp, the locking clamp and the deformation portion correspond one to one, the end of the locking clamp matches the shape of the corner portion, and the locking clamp is configured to be suitable for squeezing the corner portion along the radial direction of the locking nut to form the deformation portion.

[0018] Preferably, the processing equipment further comprises a driving member, and the driving member hydraulically drives the locking clamp.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The locking nut and processing equipment are characterized by providing a deformation portion on the locking nut. When the locking nut and the bolt are used in combination, the deformation portion can squeeze the outer wall of the bolt, thereby achieving a locking effect of the locking nut. Compared with the prior art that uses a nylon ring to achieve an anti-loosening effect, the above technical solution achieves the locking function through the deformation of the locking nut itself, eliminating the assembly step of the nylon ring. The above technical solution can be made of all-metal materials, avoiding the operating temperature limitation of nylon and having a wider range of applications.

[0021] The deformation portion has a large size in the circumferential direction of the locking nut, and the deformation portion smoothly transitions close to its center, so that the thread surface of the locking nut corresponding to the deformation portion is deformed as a whole, ensuring that the thread is not easily bitten during the installation of the locking nut, and the deformation of a large area is easy to recover, ensuring that the locking function can be normally achieved during subsequent repeated use.

[0022] The present invention is further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a partial cross-sectional schematic diagram of a locking nut deformation portion before forming according to the present invention from one viewing angle;

[0024] Figure 2 This is a schematic diagram of the entire locking nut before the deformation portion is formed, viewed from another perspective;

[0025] Figure 3 This is a cross-sectional schematic diagram of the entire locking nut after the deformation portion is formed, taken from one viewing angle;

[0026] Figure 4 This is a schematic diagram of the entire locking nut after the deformation portion is formed, viewed from another perspective;

[0027] Figure 5 This is an overall schematic diagram of a locking nut and processing equipment described in the utility model. DETAILED DESCRIPTION

[0028] The following description is intended to fully illustrate the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are provided for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention as defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0029] See also Figure 1-4 The present invention provides a technical solution: a locking nut 100, wherein one side of the locking nut 100 in the axial direction extends radially inwardly along the locking nut 100 to form a plurality of deformation portions 1013, the deformation portions 1013 being distributed at intervals along the circumference of the locking nut 100, and a retaining portion 1014 being provided between adjacent deformation portions 1013 in the circumferential direction of the locking nut 100, and the curvature of the retaining portion 1014 being the same as the curvature of any point in the axial direction of the locking nut 100;

[0030] In the circumferential direction of the locking nut 100 , the size of the deforming portion 1013 is much larger than the size of the retaining portion 1014 ;

[0031] In the axial and circumferential directions of the locking nut 100 , the radial dimension of the deformation portion 1013 gradually decreases as it approaches the center of the deformation portion 1013 .

[0032] By providing the deformation portion 1013 on the lock nut 100, when the lock nut 100 and the bolt are used in combination, the deformation portion 1013 can squeeze the outer wall of the bolt, thereby achieving a locking effect of the lock nut 100. Compared with the prior art that uses a nylon ring to achieve an anti-loosening effect, the above technical solution achieves the locking function through the deformation of the lock nut 100 itself, eliminating the assembly step of the nylon ring. The above technical solution can be made of all-metal materials, avoiding the operating temperature limitation of nylon and having a wider range of applications.

[0033] The deformation portion 1013 has a large size in the circumferential direction of the locking nut 100, and the deformation portion 1013 smoothly transitions close to its center, so that the thread surface of the locking nut 100 corresponding to the deformation portion 1013 is deformed as a whole, ensuring that the thread is not easily bitten during the installation of the locking nut 100, and the deformation of a large area is easy to recover, ensuring that the locking function can be normally realized during subsequent repeated use.

[0034] Regarding the circumference of the lock nut 100, the size of the deformable portion 1013 is much larger than the size of the retaining portion 1014. Preferably, the size of the retaining portion 1014 is no larger than one tenth of the size of the deformable portion 1013. Preferably, in the axial direction of the lock nut 100, the size of the deformable portion 1013 is 0.20 mm to 0.80 mm.

[0035] Furthermore, the number of the deforming portions 1013 is an odd number, and the number of the deforming portions 1013 is not less than 3, and the deforming portions 1013 are evenly spaced around the circumference of the locking nut 100. According to the above definition, when the deforming portions 1013 are evenly spaced around the circumference of the locking nut 100, when the number of the deforming portions 1013 is an odd number, there is no deforming portion 1013 whose center is radially opposite to the center of another deforming portion 1013. Therefore, when the centers of the deforming portions 1013 are simultaneously squeezed by an external clamp, the presence of two directly opposing force points on radially opposite sides of the locking nut 100 is avoided, which would result in conflicting force directions and affect the processing of the deforming portions 1013.

[0036] Furthermore, a plurality of corner portions 1011 are provided on the outer side of the locking nut 100 , and the number of the corner portions 1011 is a multiple of 3. An inter-corner portion 1012 is formed between the circumferentially adjacent corner portions 1011 of the locking nut 100 , and the deformation portion 1013 is provided corresponding to the inter-corner portion 1012 .

[0037] In one embodiment, the number of the corner portions 1011 is 12, the inter-corner portion 1012 is a groove structure, the number of the deformable portions 1013 is 3, and adjacent deformable portions 1013 are evenly spaced at 120° around the circumference of the locking nut 100, and the retaining portion 1014 is located at the center of two adjacent deformable portions 1013. The three deformable portions 1013 are evenly spaced around the circumference of the locking nut 100, so that the radial cross-section of the locking nut 100 forms a regular arc triangle, see Figure 4 , the arc triangle is similar to the Ruroux triangle.

[0038] Preferably, the locking nut 100 is a locking nut with uniform thickness.

[0039] When the locking nut 100 has a relatively thick wall, thinning grooves are cut and formed on the inner and / or outer sides of the locking nut 100 corresponding to the deformed portion 1013. The thinning grooves are arranged along the circumference of the locking nut 100. In one embodiment, the number of outer corners 1011 of the locking nut 100 is six, and the thinning grooves are cut and formed on the inner wall of the locking nut 100 along the circumference of the locking nut 100. This prevents the deformation portion 1013 from being squeezed and formed on the locking nut 100 due to the thick wall of the hexagonal locking nut 100.

[0040] In one embodiment, the radial inner side of the locking nut 100 is covered with a thread groove, the two axial ends of the locking nut 100 are respectively a first end 100a and a second end 100b, the locking nut 100 includes a first portion 101 and a second portion 102 extending between the first end 100a and the second end 100b, the deformation portion 1013 is arranged at the first end 100a of the locking nut 100, the corner portion 1011 is arranged on the radial outer side of the first portion 101, and the radial outer side of the second portion 102 extends outward to form a flange 1021. Specifically, the flange 1021 includes a first flange portion 10211 and a second flange portion 10212. In the axial direction of the locking nut 100, the corner portion 1011, the first flange portion 10211, and the second flange portion 10212 are sequentially connected. The radial dimension of the first flange portion 10211 gradually increases as it approaches the second flange portion 10212, so that the outer wall of the first flange portion 10211 forms a slope. The radial outer side of the first flange portion 10211 near the first end 100a is flush with the radial outer side of the corner portion 1011, and the radial outer side of the first flange portion 10211 near the second end 100b is flush with the radial outer side of the second flange portion 10212. By defining the shape of the flange 1021, when the second end 100b of the locking nut 100 is in pressurized contact with the outside, the flange 1021 can provide a larger contact area, thereby achieving stable support.

[0041] Preferably, see Figure 1 and Figure 3 Both side edges of the locking nut 100 in the axial direction are provided with chamfers, and the angle between the chamfers and the end face of the locking nut 100 is 30°.

[0042] See also Figure 5 The present invention also provides a processing device 200, including the above-mentioned locking nut 100, the corner portion 1012 is a groove structure, and the processing device 200 also includes a locking clamp 201, the locking clamp 201 and the deformation portion 1013 correspond one to one, the end of the locking clamp 201 matches the shape of the corner portion 1012, and the locking clamp 201 is configured to be suitable for squeezing the corner portion 1012 along the radial direction of the locking nut 100 to form the deformation portion 1013.

[0043] Furthermore, a fitting surface 2011 is provided on the outer side of the distal end of the locking clamp 201. The fitting surface 2011 fits radially inwardly with the radially inner side of the corner portion 1012. A gap 2012 is reserved circumferentially between the fitting surface 2011 and two adjacent corner portions 1011 of the corner portion 1012. When the fitting surface 2011 is pressed radially inwardly along the locking nut 100, the two adjacent corner portions 1011 of the corner portion 1012 deform, and the two adjacent corner portions 1011 move closer together circumferentially of the locking nut 100. The reserved gap 2012 allows the two adjacent corner portions 1011 to move.

[0044] Furthermore, the processing equipment 200 further includes: a driving member, which drives and connects to the locking fixture 201. Preferably, the driving member adopts a hydraulic driving mode. For example, three deformation parts 1013 are arranged at equal intervals around the locking nut 100. When in use, the driving member drives the end of the locking fixture 201 to apply external force to the corner parts 1012 corresponding to the deformation parts 1013, so that the internal thread of the locking nut 100 changes to form the deformation parts 1013. Figure 5 The locking fixture 201 driven by the driving member during the locking process can generate a relatively simple and controllable torque on the diagonal portion 1012, thereby making the degree of thread deformation and shape controllable.

[0045] It should be noted that, in subsequent tests and inspections of the locking nut 100 after being tightened by the processing equipment 200, the locking nut 100 was repeatedly installed and removed 15 times, and the torque value change on the digital torque wrench was maintained within + / -10%.

[0046] In summary, by providing the deformation portion 1013 on the locking nut 100, when the locking nut 100 and the bolt matched therewith are used in combination, the deformation portion 1013 can squeeze the outer wall of the bolt, thereby achieving a locking effect of the locking nut 100. Compared with the prior art that uses an additional nylon ring to achieve an anti-loosening effect, the above technical solution achieves the locking function through the deformation of the locking nut 100 itself, eliminating the assembly step of the nylon ring. The above technical solution can be made of all-metal materials, avoiding the operating temperature limitation of nylon and having a wider range of applications.

[0047] The deformation portion 1013 has a larger size in the circumferential direction of the locking nut 100, and the deformation portion 1013 smoothly transitions close to its center, so that the thread surface of the locking nut 100 corresponding to the deformation portion 1013 is deformed as a whole, ensuring that the thread is not easily bitten during the installation of the locking nut 100.

[0048] The embodiments described above are only used to illustrate the technical ideas and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The scope of patent application of the present invention cannot be limited by these embodiments alone. That is, any equivalent changes or modifications made according to the spirit disclosed by the present invention still fall within the patent scope of the present invention.

Claims

1. A locking nut, wherein a plurality of corner portions (1011) are distributed on the radial outer side of the locking nut (100), and an inter-corner portion (1012) is formed between the corner portions (1011) adjacent to each other in the circumferential direction of the locking nut (100), characterized in that: One side of the locking nut (100) in the axial direction extends radially inward along the locking nut (100) to form a plurality of deformation portions (1013), the deformation portions (1013) are distributed at intervals along the circumference of the locking nut (100), and a retaining portion (1014) is provided between adjacent deformation portions (1013) in the circumferential direction of the locking nut (100), and the curvature of the retaining portion (1014) is the same as the curvature of any point in the axial direction of the locking nut (100); The radial dimension of the deformation portion (1013) gradually decreases as it approaches the center of the deformation portion (1013), and in the circumferential direction of the locking nut (100), the dimension of the deformation portion (1013) is much larger than the dimension of the retaining portion (1014).

2. A locking nut according to claim 1, characterized in that: The deformation parts (1013) are arranged at equal intervals around the circumference of the locking nut (100), the number of the deformation parts (1013) is an odd number, and the number of the deformation parts (1013) is not less than 3.

3. A locking nut according to claim 2, characterized in that: The number of the corner portions (1011) is a multiple of 3, and the deformation portion (1013) is provided corresponding to the inter-corner portion (1012).

4. A locking nut according to claim 3, characterized in that: The number of the corner portions (1011) is 12, the number of the deformation portions (1013) is 3, and adjacent deformation portions (1013) are evenly spaced at 120° in the circumferential direction of the locking nut (100), and the retaining portion (1014) is located at the center of two adjacent deformation portions (1013).

5. A locking nut according to claim 1, characterized in that: The inner side and / or outer side of the corresponding deformation portion (1013) of the locking nut (100) are provided with thinning grooves formed by cutting, and the thinning grooves are arranged along the circumference of the locking nut (100).

6. A locking nut according to claim 1, characterized in that: The two axial ends of the locking nut (100) are respectively a first end (100a) and a second end (100b); the locking nut (100) comprises a first portion (101) and a second portion (102) extending between the first end (100a) and the second end (100b); the deformation portion (1013) is arranged at the first end (100a) of the locking nut (100); the corner portion (1011) is arranged on the radially outer side of the first portion (101); and the radially outer side of the second portion (102) extends outward to form a flange (1021).

7. A locking nut according to claim 6, characterized in that: The flange (1021) includes a first flange portion (10211) and a second flange portion (10212), and in the axial direction of the locking nut (100), the corner portion (1011), the first flange portion (10211) and the second flange portion (10212) are connected in sequence, wherein the radial dimension of the first flange portion (10211) gradually increases as it approaches the second flange portion (10212), the radial outer side of the first flange portion (10211) close to the first end (100a) is flush with the radial outer side of the corner portion (1011), and the radial outer side of the first flange portion (10211) close to the second end (100b) is flush with the radial outer side of the second flange portion (10212).

8. A locking nut according to claim 1, characterized in that: In the axial direction of the locking nut (100), the size of the deformation portion (1013) is 0.20 mm to 0.80 mm.

9. A processing device, comprising the locking nut (100) according to any one of claims 1 to 8, wherein the angular portion (1012) is a groove structure, and the processing device (200) further comprises a locking clamp (201), wherein the locking clamp (201) and the deformation portion (1013) correspond one to one, and the end of the locking clamp (201) matches the shape of the angular portion (1012), and the locking clamp (201) is configured to extrude the angular portion (1012) along the radial direction of the locking nut (100) to form the deformation portion (1013).

10. A processing device according to claim 9, characterized in that: The processing equipment (200) further comprises a driving member, which hydraulically drives the locking clamp (201).

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