Removable reusable locking nut

Abstract

The application relates to the technical field of fasteners, and particularly discloses a detachable and reusable locking nut, which comprises two inner rings and an outer ring capable of tightly holding the two inner rings, each of the inner rings is provided with an internal thread, and each of the outer walls of the inner rings is provided with a bevel, the bevels on the two inner rings form a V shape when the two inner rings are tightly installed; the outer ring comprises two clamping rings capable of being closely contacted with each other, and the clamping rings are provided with wedge surfaces capable of pushing the bevels of the inner rings. The scheme is used to solve the problem that the YSK locking nut with reliable locking performance cannot be detached and reused after being used for a long time.

Description

Technical Field

[0001] This invention relates to the field of fastener technology, and more specifically to removable and reusable lock nuts. Background Technology

[0002] Lock nuts are widely used for axial fastening. However, with the passage of time, the long-term vibration of the locked parts causes the lock nuts to loosen. Once the lock nuts loosen, if they are not tightened again, it will affect the normal use of the locked parts. At present, there are many kinds of lock nuts on the market, but these lock nuts basically have the problem that they cannot be reused after being disassembled after a long time. Taking the YSK lock nut, one of the most reliable lock nuts on the market, as an example, the lock nut has annular grooves machined on both its inner and outer walls. A through-hole is machined along the axial direction of the lock nut, penetrating both the inner and outer annular grooves and the nut itself. A screw can be installed in the through-hole. The two annular grooves give the nut a certain degree of axial elasticity, the magnitude of which is determined by the screw in the through-hole. This type of lock nut can withstand vibration over long periods. However, after prolonged use, the nut's elasticity becomes irreversible, essentially changing from elastic deformation to plastic deformation. Once the lock nut loosens or needs to be disassembled and reinstalled after a long period of use, it loses its elasticity and cannot function properly, thus becoming unusable. Summary of the Invention

[0003] The present invention aims to provide a removable and reusable locking nut to address the problem that the currently reliable YSK locking nuts cannot be disassembled and reused after prolonged use.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The removable and reusable locking nut includes two inner rings and an outer ring that can simultaneously clamp the two inner rings. Each inner ring has an internal thread and a bevel on its outer wall. When the two inner rings are fastened, the bevels on the two inner rings form a V-shape. The outer ring includes two retaining rings that can be pressed together. The retaining rings have wedges that can push against the bevels of the inner rings.

[0006] The principle and advantages of this solution are as follows: In practical applications, when a bolt is needed to lock the component, one inner ring is first screwed onto the component. Then, the remaining inner ring is screwed onto the bolt, leaving a gap between the two inner rings. The two retaining rings are then brought together so that the resulting outer ring simultaneously grips the inner ring. Because the retaining rings have wedge surfaces and the inner rings have inclined surfaces, as the two retaining rings approach, the wedge surfaces continuously push against the inclined surfaces. The inclined surfaces of the two inner rings form a V-shape, causing the two inclined surfaces to experience opposite forces, thus causing the two inner rings to move in opposite axial directions. After the outer ring locks the inner ring, the outer ring and the two inner rings form a complete unit. However, because the inclined surfaces move in opposite directions during the locking process, the pitch of the two inner rings mounted on the bolt is unequal. This ensures that the nut as a whole is difficult to loosen under long-term vibration, guaranteeing the nut's anti-loosening effect over extended periods.

[0007] When the nut needs to be disassembled, the connection between the two retaining rings is first disassembled. After the retaining rings are disassembled, the two inner rings become separate inner rings again. There is no damage to the inner rings and retaining rings, so they can be reused after disassembly. This solves the problem in the existing technology that YSK locking nuts cannot be disassembled and reused after a long period of use.

[0008] Preferably, as an improvement, the V-shaped flared opening formed by the two inclined surfaces faces the center of the inner ring, each retaining ring is semi-circular, and each retaining ring has a trapezoidal groove on its annular inner wall facing the inner ring. The two groove walls of the trapezoidal groove form two wedge surfaces, and the two wedge surfaces of the same retaining ring can simultaneously abut against the inclined surfaces on the two inner rings.

[0009] Preferably, as an improvement, the V-shaped opening formed by the two inclined surfaces faces the center of the inner ring, each retaining ring is circular, each retaining ring has a conical surface, the conical surface forms a wedge surface that pushes against the inclined surface of the inner ring, and one retaining ring is correspondingly pressed against the inclined surface on one inner ring.

[0010] Preferably, as an improvement, the V-shaped flared opening formed by the two inclined surfaces faces outward from the inner ring, the retaining ring is semi-circular, and each retaining ring has a trapezoidal protrusion on its annular inner wall facing the inner ring. The two inclined surfaces of the trapezoidal protrusion form two wedge surfaces, and the two wedge surfaces of the same retaining ring can simultaneously abut against the inclined surfaces on the two inner rings.

[0011] Preferably, as an improvement, one of the two retaining rings has a through hole and the other has a threaded hole on its opposite end face, and the two retaining rings are fixedly connected by screws inserted into the through hole and the threaded hole.

[0012] Preferably, as an improvement, the screw is fitted with a spring washer, which can prevent the screw from loosening.

[0013] Preferably, as an improvement, the outer wall of the inner ring is provided with a retaining groove, one of the inclined walls of the retaining groove being an inclined surface. The retaining groove allows the inner ring to have a larger volume and higher strength.

[0014] Preferably, as an improvement, the inner ring end face is provided with a hole, which facilitates the insertion of the handle into the blind hole on the inner ring end face for screwing the inner ring. Attached Figure Description

[0015] Figure 1 This is a longitudinal sectional view (also known as a front sectional view) of Embodiment 1 of the present invention.

[0016] Figure 2 This is a schematic diagram along direction A of Embodiment 1 of the present invention.

[0017] Figure 3 This is a schematic diagram from direction B in Embodiment 1 of the present invention.

[0018] Figure 4 for Figure 1 The front sectional view after removing the outer ring.

[0019] Figure 5 for Figure 1 A three-dimensional structural diagram of the clasp.

[0020] Figure 6 This is a longitudinal sectional view (also known as a front sectional view) of Embodiment 2 of the present invention.

[0021] Figure 7 This is a schematic diagram along direction C of Embodiment 2 of the present invention.

[0022] Figure 8 This is a longitudinal sectional view (also known as a front sectional view) of the trapezoidal protrusion with clearance groove in Embodiment 3 of the present invention.

[0023] Figure 9 This is a longitudinal sectional view (also known as a front sectional view) of the trapezoidal protrusion without the clearance groove in Embodiment 3 of the present invention. Detailed Implementation

[0024] The following detailed description illustrates the specific implementation method:

[0025] The reference numerals in the accompanying drawings include:

[0026] Figures 1 to 5 : Inner ring 1, clamping groove 11, inclined surface 110, blind hole 12, outer ring 2, retaining ring 21, wedge surface 210, trapezoidal groove 211, screw 3, spring washer 4.

[0027] Figure 6 and Figure 7: Inner ring 1, bevel 110, blind hole 12, outer ring 2, retaining ring 21, wedge surface 210, screw 3, spring washer 4.

[0028] Figure 8 and Figure 9 Inner ring 1, clamping groove 11, inclined surface 110, blind hole 12, outer ring 2, retaining ring 21, wedge surface 210, protrusion 220, clearance groove 221.

[0029] Example 1

[0030] The basic implementation examples are as follows: Figures 1 to 5 As shown, the detachable and reusable locking nut includes two inner rings 1 and an outer ring 2 capable of simultaneously clamping the two inner rings 1. Both inner rings 1 have internal threads machined at their centers, and the two inner rings 1 are symmetrically structured. Each inner ring 1 has an annular clamping groove 11 machined on its outer wall. In this embodiment, the longitudinal section of the clamping groove 11 is a right-angled trapezoid, and one inclined wall of the clamping groove 11 is an inclined surface 110. When the two inner rings 1 are fastened, the inclined surfaces 110 on the two inner rings 1 form a V-shape. The flared end of the V-shape formed by the two inclined surfaces 110 faces the center of the inner ring 1.

[0031] The outer ring 2 includes two retaining rings 21 that can be pressed together. Each retaining ring 21 is semi-circular, and each retaining ring 21 has a trapezoidal groove 211 machined on its annular inner wall facing the inner ring 1. The two groove walls of the trapezoidal groove 211 form two wedge surfaces 210. The two wedge surfaces 210 of the same retaining ring 21 can simultaneously push against the inclined surfaces 110 on the two inner rings 1. In this embodiment, the presence of the trapezoidal groove 211 makes the inner ring 1 larger in volume, which is beneficial for the inner ring 1 to have higher strength.

[0032] One of the two retaining rings 21 has a smooth hole on its opposite end face, while the other has a threaded hole. The two retaining rings 21 are fixedly connected by screws 3 inserted into the through hole and the threaded hole. In this embodiment, since the retaining ring 21 is semi-circular, the screw 3 is perpendicular to the axial direction of the nut, the smooth hole is a stepped hole, and the screw 3 is a headed screw.

[0033] To enhance the locking effect of screw 3 on the two retaining rings 21, a spring washer 4 is fitted onto screw 3.

[0034] The inner ring 1 has an eccentrically set blind hole 12 machined on its end face. The blind hole 12 is parallel to the internal thread of the inner ring 1, so that a wrench can be inserted into the blind hole 12 on the end face of the inner ring 1 to tighten the inner ring 1.

[0035] The specific implementation process is as follows:

[0036] When the bolt is needed to lock the locking component, first screw one of the inner rings 1 until it is pressed against the locking component. Then screw the remaining inner ring 1 onto the bolt, leaving a gap between the two inner rings 1. Then bring the two retaining rings 21 together so that the outer ring 2 formed by them simultaneously hugs the outer ring 2, achieving the desired effect. Figure 1 As shown in the diagram, because the retaining ring 21 has a wedge surface 210 and the inner ring 1 has an inclined surface 110, as the two retaining rings 21 approach each other, the wedge surface 210 continuously pushes the two inclined surfaces 110 to move along the nut axial direction and approach each other. After the outer ring 2 locks the inner ring 1, that is, after the two retaining rings 21 are connected by the screw 3, the outer ring 2 and the two inner rings 1 form a complete whole. However, because the inclined surfaces 110 move in opposite directions during the locking process of the two inner rings 1, the pitch of the two inner rings 1 under the nut is not equal when installed on the bolt. This ensures that the whole formed by the nut is still difficult to loosen under vibration during long-term use, thus ensuring the anti-loosening effect of the nut over a long period of time.

[0037] When it is necessary to remove the nut, first remove the screw 3 connecting the two retaining rings 21. After the retaining rings 21 are removed, the two inner rings 1 become separate inner rings 1. The two inner rings 1 are independent of each other. There is no damage to the inner rings 1 and retaining rings 21 during the disassembly process, so they can be reused after disassembly.

[0038] Example 2

[0039] Combination Figure 6 and Figure 7 The difference between Embodiment 2 and Embodiment 1 is as follows: First, the inner ring 1 is not machined with a clamping groove, but instead has a bevel 110 on its outer circumferential surface. The bevel 110 formed by combining two inner rings 1 is still V-shaped, and the flared end of the V-shape still faces the center of the inner ring 1. Second, each retaining ring 21 is not semi-circular, but circular. Conical surfaces are machined on the opposing surfaces of the two retaining rings 21, forming a wedge 210 that pushes against the bevel 110 of the inner ring 1. One retaining ring 21 corresponds to one bevel 110 on one inner ring 1. Third, the installation direction of the screw 3 is changed to be parallel to the axial direction of the nut.

[0040] Compared to Embodiment 1, the structure of the retaining ring 21 and the structure of the inner ring 1 have been changed in this embodiment. The nut structure with this retaining ring 21 can still change the pitch of the two inner rings 1 fastened to the bolt, so as to achieve the anti-loosening effect under long-term use, and at the same time, it can be reused after disassembly.

[0041] Example 3

[0042] Combination Figure 8 and Figure 9The difference between Embodiment 3 and Embodiment 1 is that the position of the inclined surface 110 on the clamping groove 11 of each inner ring 1 changes, and the inclined surface 110 of the two inner rings 1 after being installed on the bolt forms a V-shape with the flared mouth facing outward of the inner ring 1; the retaining ring 21 is still semi-circular, but the difference is that the annular inner wall of each retaining ring 21 facing the inner ring 1 is not a trapezoidal groove, but a protrusion 220 with a trapezoidal longitudinal section. The two inclined surfaces 110 of the trapezoidal protrusion 220 form two wedge surfaces 210, and the two wedge surfaces 210 of the same retaining ring 21 can simultaneously abut against the inclined surfaces 110 on the two inner rings 1. Figure 8 In this case, because the inner ring 1 is machined with a right-angled trapezoidal clamping groove 11, an annular clearance groove 221 for clearing the inner ring 1 is machined in the middle of the protrusion 220 of the retaining ring 21. Of course, when the inclined surface 110 of the inner ring 1 is only provided on the outer peripheral surface, that is, as... Figure 9 As shown, the protrusion 220 of the retaining ring 21 at this time does not have a clearance groove 221.

[0043] In this third embodiment, regardless of time... Figure 8 still Figure 9 In this embodiment, when the two retaining rings 21 are fastened by screws, the two retaining rings 21 approach each other and push the two inner rings 1 with inclined surfaces 110 in opposite directions to the nut axis through the wedge surface 210. This embodiment makes the two inner rings 1 move away from each other, which is still equivalent to the two inner rings 1 being installed on the bolt with different pitches, but they are formed into a whole through the retaining rings 21, so that the long-term use without loosening can still be achieved as in Embodiment 1.

[0044] Furthermore, since neither the inner ring 1 nor the retaining ring 21 of this embodiment has a strip-shaped groove to generate elasticity, even after the nut has been used for a long time, there will be no irreversible deformation of the inner ring 1 or the retaining ring 21. This ensures that the nut of this embodiment can be reused even after disassembly after a long period of use.

[0045] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A detachable and reusable locking nut, characterized in that: It includes two inner rings and an outer ring that can simultaneously hold the two inner rings together. Each inner ring has an internal thread and a bevel on its outer wall. When the two inner rings are fastened together, the bevels on the two inner rings form a V-shape. The outer ring includes two retaining rings that can be pressed together. The retaining rings have wedges that can push against the bevels of the inner rings. The V-shaped opening formed by the two inclined surfaces faces the center of the inner ring. Each retaining ring is semi-circular. Each retaining ring has a trapezoidal groove on its inner wall facing the inner ring. The two groove walls of the trapezoidal groove form two wedge surfaces. The two wedge surfaces of the same retaining ring can simultaneously abut against the inclined surfaces on the two inner rings. Alternatively, the V-shaped opening formed by the two inclined surfaces faces the center of the inner ring, each retaining ring is circular, and each retaining ring has a conical surface, which forms a wedge surface that pushes against the inclined surface of the inner ring, with one retaining ring corresponding to one inclined surface on the inner ring.

2. The removable and reusable locking nut according to claim 1, characterized in that: One of the two retaining rings has a through hole and the other has a threaded hole on its opposite end face. The two retaining rings are fixedly connected by screws inserted into the through hole and the threaded hole.

3. The removable and reusable locking nut according to claim 2, characterized in that: A spring washer is fitted onto the screw.

4. The removable and reusable locking nut according to claim 1, characterized in that: When each retaining ring is semi-circular, the outer wall of the inner ring is provided with a clamping groove, and one of the inclined groove walls of the clamping groove is an inclined surface.

5. The removable and reusable locking nut according to claim 1, characterized in that: The inner ring end face is provided with a hole, which makes it convenient to insert the handle into the inner ring end face to screw the inner ring.

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