High-precision light nut

Abstract

The utility model relates to the field of nut discloses a high accuracy light weight nut, including a plurality of L shape grooves, a plurality of L shape grooves all are set up in the top surface of nut body, the inner wall of nut body is seted up with internal thread, the inner wall of L shape groove is inserted and is equipped with the connecting column, the outer wall of connecting column is coiled with the tension spring, one end of tension spring is connected with the inner wall of L shape groove, the other end of tension spring is connected with the outer wall of connecting column, the connecting column is fixed with the connecting block, the connecting block is fixed with the inclined strip, the inclined strip corresponds with internal thread. In the utility model, through the synergies of connecting column, tension spring, connecting block and inclined strip, can realize the dynamic movement locking of inclined strip in the process of nut body rotation, make the inclined strip can closely fit bolt external thread tooth side wall to form the self -adaptation compensation constraint to the small relative displacement of vibration, impact etc. Dynamic working condition under the screw pair produces, prevents the nut body and appears the reverse loosening and the bouncing trend.

Description

Technical Field

[0001] This utility model relates to the technical field of nuts, specifically a high-precision lightweight nut. Background Technology

[0002] With the rapid development of the new energy vehicle industry, its drive motors are evolving towards intelligence, efficiency, miniaturization, and integration. This places more stringent demands on every component within the system. Nuts, as key connecting parts, currently face the dual challenges of lightweighting and high precision. Standard nuts on the market cannot simultaneously meet these requirements. While thin nuts can reduce weight, their structural rigidity may be insufficient, and they lack special precision control; high-precision nuts often have traditional structures and offer no weight advantage.

[0003] Chinese patent CN223241848U discloses an anti-slip nut, which includes a nut mechanism. The outer wall of the nut mechanism is slidably connected with six sets of nut fixing angle mechanisms. An anti-slip pad is installed at the bottom of the nut mechanism. The nut mechanism includes a nut body. The inner wall of the nut body is threaded. The outer wall of the nut body is provided with six sets of sliding grooves. The bottom end of each set of sliding grooves is provided with a through groove. The inner wall of the through groove is slidably connected with a limit rod.

[0004] In the prior art, by setting an anti-slip pad 3 at the bottom of the nut body 101 to prevent the nut from sliding down the bolt thread due to vibration, the following disadvantages exist: under vibration conditions, the preload between the nut and the connected parts will gradually loosen over time, the normal pressure between the anti-slip pad and the contact surface will decrease accordingly, the static friction will weaken simultaneously, and the nut will easily loosen in the opposite direction and jump, which cannot effectively prevent the nut from sliding down the thread. Utility Model Content

[0005] The purpose of this invention is to provide a high-precision, lightweight nut to solve the problem that under vibration conditions, the preload between the nut and the connected parts gradually loosens over time, the normal pressure between the anti-slip pad and the contact surface decreases accordingly, the static friction weakens simultaneously, the nut is prone to reverse loosening and jumping, and it is impossible to effectively prevent the nut from sliding down the thread.

[0006] To achieve the above-mentioned utility model objectives, the present utility model adopts the following technical solution: a high-precision lightweight nut, comprising a plurality of L-shaped grooves, all of which are formed on the top surface of the nut body. The inner wall of the nut body is provided with an internal thread. A connecting post is inserted into the inner wall of the L-shaped groove. A tension spring is wound around the outer wall of the connecting post. One end of the tension spring is connected to the inner wall of the L-shaped groove, and the other end of the tension spring is connected to the outer wall of the connecting post. A connecting block is fixed on the connecting post, and an oblique strip is fixed on the connecting block. The oblique strip corresponds to the internal thread.

[0007] Preferably, the outer wall of the nut body has several inclined surfaces, and the top and bottom surfaces of the nut body have arc-shaped chamfers.

[0008] Preferably, the radius of the arc of the nut body is R2-R5mm, and the hardness is 250-350HV10.

[0009] Preferably, the outer wall of the nut body is fixed with several anti-slip reinforcing ribs.

[0010] Preferably, a mounting ring is fixed to the top surface of the nut body, a rubber ring is fixed to the top surface of the mounting ring, and the connecting post extends to the top surface of the rubber ring.

[0011] Preferably, the surface of the nut body is coated with a zinc-nickel alloy coating.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. Through the synergistic action of the connecting column, tension spring, connecting block, and diagonal bar, the diagonal bar can dynamically move and lock during the rotation of the nut body. This allows the diagonal bar to closely fit the sidewall of the bolt's external thread, thus providing adaptive compensation constraint for the minute relative displacements generated by the threaded pair under dynamic conditions such as vibration and impact. This effectively prevents the nut body from loosening or running out, significantly improving the anti-loosening performance of the nut body connection. The diagonal surface reduces redundant material in the nut body, directly reducing weight. Simultaneously, the diagonal structure disperses radial forces, avoiding localized stress concentration and improving structural stability.

[0014] Second, the radius of the arc is R2-R5mm, which reduces material accumulation through the arc transition and avoids a decrease in structural strength due to excessive arc, ensuring the load-bearing capacity of the nut body under the premise of lightweight design; the hardness range of 250-350HV10 is medium to high strength, taking into account both wear resistance and a certain degree of toughness. The anti-slip reinforcing ribs reduce friction with tools such as wrenches and sockets, preventing slippage during assembly and disassembly, improving assembly efficiency and torque transmission accuracy. At the same time, the rib structure enhances the deformation resistance of the outer wall of the nut body without significantly increasing weight, improving the overall structural strength.

[0015] Third, the rubber ring on the top surface of the mounting ring ensures a tight seal with the connected parts after the nut is tightened, forming a sealing barrier to prevent dust and liquid from seeping into the internal thread connection. Simultaneously, the elasticity of the rubber ring cushions vibrations, further reducing the risk of the nut loosening. The zinc-nickel alloy coating provides excellent resistance to salt spray and atmospheric corrosion, protecting the nut from environmental erosion and extending its service life. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of an embodiment.

[0017] Figure 2 This is a cross-sectional schematic diagram of an embodiment.

[0018] Figure 3 This is a top view schematic diagram of an embodiment.

[0019] Figure 4 This is a cross-sectional view of the mounting ring in an embodiment.

[0020] In the diagram: 1. L-shaped groove; 2. Nut body; 3. Internal thread; 4. Connecting post; 5. Tension spring; 6. Connecting block; 7. Diagonal strip; 8. Bevel; 9. Arc-shaped chamfer; 10. Anti-slip reinforcing rib; 11. Mounting ring; 12. Rubber ring. Detailed Implementation

[0021] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0022] like Figures 1-4 As shown, a high-precision lightweight nut includes several L-shaped grooves 1, all of which are formed on the top surface of the nut body 2. The inner wall of the nut body 2 is provided with internal threads 3. A connecting post 4 is inserted into the inner wall of the L-shaped groove 1. A tension spring 5 is wound around the outer wall of the connecting post 4. One end of the tension spring 5 is connected to the inner wall of the L-shaped groove 1, and the other end of the tension spring 5 is connected to the outer wall of the connecting post 4. A connecting block 6 is fixed on the connecting post 4, and a diagonal strip 7 is fixed on the connecting block 6. The diagonal strip 7 corresponds to the internal threads 3. Several inclined surfaces 8 are formed on the outer wall of the nut body 2. The top and bottom surfaces of the nut body 2 are both provided with arc-shaped chamfers 9.

[0023] In use, when it is necessary to install the nut body 2, first screw the nut body 2 into the target bolt to ensure that the internal thread 3 of the nut body and the external thread of the bolt are precisely aligned and fitted to complete the initial connection positioning; then the operator uses the appropriate tool (such as a wrench or socket) to apply the tightening torque to the nut body 2, driving the nut body 2 to move along the bolt axis towards the connecting part. During this process, the mounting ring 11 on the top surface of the nut body 2 and its integrated rubber ring 12 move towards the surface of the connecting part simultaneously.

[0024] As the nut body 2 continues to tighten, when the top of the connecting post 4 comes into contact with the surface of the connector, the axial compressive force generated between the nut body and the connector acts on the connecting post 4, causing the connecting post 4 to move in a directional manner along the inner wall of the L-shaped groove 1 into the nut body 2. During this process, the tension spring 5 wrapped around the outer wall of the connecting post 4 is stretched synchronously, thereby generating an elastic preload.

[0025] When the connecting column 4 moves under axial force, the connecting block 6 fixed to it synchronously drives the inclined strip 7 to move towards the external thread of the bolt until the inclined strip 7 forms a close contact with the side wall of the external thread of the bolt. When the mounting ring 11 and the rubber ring 12 reach a tight fit with the surface of the connecting parts, the connecting column 4, the connecting block 6 and the inclined strip 7 reach the maximum displacement position. At this time, the tension of the tension spring 5 reaches the maximum, and the elastic preload generated by it continues to act on the side wall of the external thread of the bolt through the inclined strip 7, forming a stable anti-loosening locking structure. This can effectively suppress the reverse loosening tendency of the nut body 2 under dynamic working conditions such as vibration and impact, and ensure the long-term reliability of the threaded connection.

[0026] Through the coordinated action of connecting column 4, tension spring 5, connecting block 6, and diagonal strip 7, the diagonal strip 7 can dynamically move and lock during the rotation of the nut body 2. This allows the diagonal strip 7 to closely fit the sidewall of the bolt's external thread, thus providing adaptive compensation constraint for the minute relative displacements generated by the threaded pair under dynamic conditions such as vibration and impact. This effectively prevents the nut body 2 from loosening or running out, significantly improving the anti-loosening performance of the nut body 2 connection. The diagonal surface 8 reduces redundant material in the nut body 2, directly reducing weight. At the same time, the diagonal surface 8 structure can disperse radial forces, avoid local stress concentration, and improve structural stability.

[0027] like Figures 1-4 As shown, the radius of the arc of the nut body 2 is R2-R5mm, the hardness is 250-350HV10, several anti-slip reinforcing ribs 10 are fixed on the outer wall of the nut body 2, an installation ring 11 is fixed on the top surface of the nut body 2, a rubber ring 12 is fixed on the top surface of the installation ring 11, the connecting post 4 extends to the top surface of the rubber ring 12, and the surface of the nut body 2 is coated with a zinc-nickel alloy coating.

[0028] In use, the radius of the arc is R2-R5mm, which reduces material accumulation through the arc transition and avoids a decrease in structural strength due to excessive arc, ensuring the load-bearing capacity of the nut body 2 under the premise of lightweight design. The hardness range of 250-350HV10 is medium to high strength, taking into account both wear resistance and a certain degree of toughness. The anti-slip reinforcing ribs 10 reduce friction with tools such as wrenches and sockets, preventing slippage during installation and removal, improving assembly efficiency and torque transmission accuracy. At the same time, the rib structure enhances the deformation resistance of the outer wall of the nut body 2 without significantly increasing weight, improving the overall structural strength. The rubber ring 12 on the top surface of the mounting ring 11 can fit tightly against the surface of the connected parts after the nut body 2 is tightened, forming a sealing barrier to prevent dust and liquid from penetrating into the internal thread 3 connection part. At the same time, the elasticity of the rubber ring 12 can buffer vibration and help reduce the risk of loosening of the nut body 2. The zinc-nickel alloy coating has excellent resistance to salt spray and atmospheric corrosion, protecting the nut body 2 from environmental erosion and extending its service life.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-precision lightweight nut, comprising a plurality of L-shaped grooves (1), wherein all of the plurality of L-shaped grooves (1) are formed on the top surface of the nut body (2), characterized in that, The inner wall of the nut body (2) is provided with an internal thread (3), the inner wall of the L-shaped groove (1) is provided with a connecting post (4), the outer wall of the connecting post (4) is wound with a tension spring (5), one end of the tension spring (5) is connected to the inner wall of the L-shaped groove (1), the other end of the tension spring (5) is connected to the outer wall of the connecting post (4), a connecting block (6) is fixed on the connecting post (4), and a diagonal strip (7) is fixed on the connecting block (6), the diagonal strip (7) corresponds to the internal thread (3).

2. The high-precision lightweight nut according to claim 1, characterized in that: The outer wall of the nut body (2) is provided with several inclined surfaces (8), and the top and bottom surfaces of the nut body (2) are provided with arc-shaped chamfers (9).

3. The high-precision lightweight nut according to claim 2, characterized in that: The radius of the arc of the nut body (2) is R2-R5mm, and the hardness is 250-350HV10.

4. A high-precision lightweight nut according to claim 3, characterized in that: The outer wall of the nut body (2) is fixed with several anti-slip reinforcing ribs (10).

5. A high-precision lightweight nut according to claim 4, characterized in that: The top surface of the nut body (2) is fixed with an installation ring (11), the top surface of the installation ring (11) is fixed with a rubber ring (12), and the connecting post (4) extends to the top surface of the rubber ring (12).

6. A high-precision lightweight nut according to claim 5, characterized in that: The surface of the nut body (2) is coated with a zinc-nickel alloy coating.

Images