Damping anti-falling nut and manufacturing process thereof

Abstract

The invention provides a damping and anti-falling nut which comprises a nut body and a locking flat gasket, the nut body comprises a nut body and a flange face, inner teeth are arranged in the nut body and the flange face, a glue injection hole is formed in the flange face, a shockproof gasket is arranged between the inner teeth, and clamping teeth are arranged on the flange face and the locking flat gasket. The nut has the beneficial effects that self-locking of the end of the nut is achieved by adopting a locking structure of clamping teeth between the stop flat gasket and the flange plate, a combined structure of the shockproof gasket and the glue injection hole is arranged in the nut, a thread locking agent is injected into the glue injection hole in advance, the thread locking agent flows out through screwing, gaps are filled, and the nut damping and anti-retreating effects are achieved.

Description

Technical Field

[0001] The invention mainly relates to the technical field of precision fasteners, and in particular to a shock-absorbing and anti-stripping nut and a manufacturing process thereof. Background Art

[0002] In new energy vehicles, trains, rails, bridge steel frames, oil drilling platforms, etc., high requirements for safety performance are required, and stable and reliable fasteners are needed, which requires the use of anti-loosening nuts and anti-loosening bolts.

[0003] Nuts are threaded fasteners, and their important advantage is that they can be disassembled and reused. Usually, nuts are screwed onto the external threads of bolts to achieve the tightening of workpieces with pre-tightening force. In actual applications, with the vibration of the workpiece or the action of external force, the nut can easily loosen along the threads on the bolt, causing the fastened workpiece to loosen or fall off.

[0004] The inventor discovered the following defects during the operation of the specific embodiment: In order to solve the problems of anti-vibration and anti-loosening of nut fasteners, commonly used methods include adding pins, chemical glue, locking plates, etc., but they can only temporarily solve the problem, with unstable performance, many anti-loosening parts, many operating steps, and complex structure.

[0005] It should be noted that the above contents belong to the technical cognition scope of the inventor. Since the technical contents in this field are vast and too complicated, the above contents of this application do not necessarily constitute prior art. Summary of the invention

[0006] 1. Technical problems to be solved by the invention: The present invention provides a shock-absorbing and anti-dropping nut and a manufacturing process thereof, so as to solve the technical problems existing in the above-mentioned background technology.

[0007] 2. Technical solution: In order to achieve the above-mentioned purpose, the technical solution provided by the present invention is: a shock-absorbing and anti-slip nut, including a nut body and a stop flat washer, the nut body includes a nut and a flange surface, the nut and the flange surface are both provided with internal teeth, the flange surface is provided with a glue injection hole, shock-absorbing washers are provided between the internal teeth, and the flange surface and the stop flat washer are both provided with locking teeth.

[0008] Furthermore, the nut and the flange surface are an integrally formed structure.

[0009] Furthermore, the internal teeth include an upper thread and a lower thread, and a tooth angle α of the lower thread is less than 60°.

[0010] Furthermore, an avoidance groove is provided between the upper thread and the lower thread, the inner wall of the avoidance groove is an inclined surface, and the effective number of turns of the upper thread is greater than the effective number of turns of the lower thread.

[0011] Furthermore, the shockproof washer is arranged in the avoidance groove and is arranged close to the glue injection hole, and there is a certain gap between the upper end of the shockproof washer and the avoidance groove.

[0012] Furthermore, the glue injection hole is a blind hole, the opening end of the glue injection hole is located inside the nut, and an isolation film is covered between the glue injection hole and the shockproof washer.

[0013] Furthermore, the two locking teeth are respectively a left-handed helical tooth and a right-handed helical tooth, and the two locking teeth are clamped to each other after matching.

[0014] Furthermore, the left-handed helical teeth and the right-handed helical teeth are respectively and correspondingly arranged on the stop flat washer and the flange surface, and side grooves are provided on the left-handed helical teeth and the right-handed helical teeth.

[0015] A manufacturing process for a shock-absorbing and anti-dropping nut comprises the following steps: S1: Raw material preparation: Select alloy steel materials with appropriate diameters and cut them into appropriate lengths of nuts and stop washers respectively, ensuring that the length of each section of raw material is consistent. The alloy steel material can be carbon steel or stainless steel; S2: Forming: Use cold heading die and cold heading machine to extrude and form nuts and stop washers respectively; S3: Hole processing: Use lathe equipment to punch holes on the inner wall of the extruded nut to process the injection holes; S4: Glue injection: After the surface of the nut is cleaned and sprayed with oil after drilling, the thread locking agent is injected into the injection hole using a glue injection machine or glue injection gun; S5: Assembly: Use a laminating machine to partially coat the outside of the shockproof gasket, apply an isolation film, and use a press machine to press the shockproof gasket into the thread. After pressing, the coated area is sealed with the glue injection hole.

[0016] 3. Beneficial effects: Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The present invention has a reasonable design and adopts a locking structure of the locking teeth between the stop flat washer and the flange to realize self-locking of the nut end. A combined structure of a shock-proof washer and a glue injection hole is arranged inside the nut, and a thread locking agent is pre-injected into the glue injection hole. The thread locking agent flows out by twisting and fills the gap, thereby achieving the effect of shock absorption and anti-retreat of the nut.

[0017] It should be noted that the structures not introduced in the present invention are the same as the prior art or can be implemented by using the prior art, and are not described in detail here because they do not involve the design points and improvement directions of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the overall structure of a shock-absorbing and anti-slipping nut provided by the present invention; Figure 2 A schematic cross-sectional view of the overall structure of a shock-absorbing and anti-slipping nut provided by the present invention; Figure 3 This is an enlarged schematic diagram of the local structure of a shock-absorbing and anti-slipping nut provided by the present invention; Figure 4 The present invention provides a schematic diagram of the manufacturing process flow of a shock-absorbing and anti-slipping nut.

[0019] Reference numerals: 1. Nut; 2. Stop flat washer; 3. Flange surface; 4. Internal teeth; 401. Upper thread; 402. Lower thread; 403. Avoidance groove; 5. Glue injection hole; 6. Shockproof washer; 7. Clamping teeth; 701. Left-handed helical teeth; 702. Right-handed helical teeth; 703. Side groove; 8. Isolation membrane. DETAILED DESCRIPTION

[0020] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "page", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", "provided with", "provided on" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example

[0024] Refer to the attached Figure 1-4 A shock-absorbing and anti-slipping nut comprises a nut body and a stop flat washer 2. The nut body comprises a nut 1 and a flange surface 3. Internal teeth 4 are provided in the nut 1 and the flange surface 3. A glue injection hole 5 is opened in the flange surface 3. Shock-absorbing washers 6 are provided between the internal teeth 4. Clamping teeth 7 are provided on the flange surface 3 and the stop flat washer 2.

[0025] The internal teeth 4 include an upper thread 401 and a lower thread 402. The tooth angle α of the lower thread 402 is less than 60°. An avoidance groove 403 is opened between the upper thread 401 and the lower thread 402. The inner wall of the avoidance groove 403 is an inclined surface. The effective number of turns of the upper thread 401 is greater than the effective number of turns of the lower thread 402. The lower thread 402 forms a self-locking property of the thread by reducing the tooth angle. The lower thread 402 is arranged close to the flange gasket 3.

[0026] The shockproof washer 6 is arranged in the avoidance groove 403 and is close to the glue injection hole 5. The shockproof washer 6 is made of nylon. There is a certain gap between the upper end of the shockproof washer 6 and the avoidance groove 403. The avoidance groove 403 is used to press the shockproof washer 6. By gradually tilting the inner wall angle upward and outward, the shockproof washer 6 is kept consistent with the inner diameter of the inner tooth 4 during the upward movement. After being screwed into place, the shockproof washer 6 still remains in the nut 1 to play a shock-absorbing role. During the screwing process, the shockproof washer 6 gradually moves upward after being squeezed upward by the screw thread.

[0027] The glue injection hole 5 is a blind hole, and the open end of the glue injection hole 5 is located on the inner side of the nut 1. An isolation film 8 is covered between the glue injection hole 5 and the shockproof washer 6. The shockproof washer 6 blocks the glue injection hole 5 through the isolation film 8 to prevent the colloid from solidifying after air enters the glue injection hole 5. After moving up, the shockproof washer 6 is separated from the glue injection hole 5, exposing the glue injection hole 5, and the thread locking agent flows out to fill the gap between the screw threads.

[0028] The two locking teeth 7 are respectively a left-handed bevel tooth 701 and a right-handed bevel tooth 702. The two locking teeth 7 are clamped to each other after matching. The left-handed bevel tooth 701 and the right-handed bevel tooth 702 are respectively arranged on the stop flat washer 2 and the flange surface 3. Side grooves 703 are provided on the left-handed bevel tooth 701 and the right-handed bevel tooth 702. After the stop flat washer 2 and the flange surface 3 are locked with each other, the thread locking agent in the injection hole 5 continues to flow downward through the side grooves 703 to fill the gap between the left-handed bevel tooth 701 and the right-handed bevel tooth 702.

[0029] A manufacturing process for a shock-absorbing and anti-dropping nut comprises the following steps: S1: Raw material preparation: Select alloy steel material with appropriate diameter and cut it into appropriate lengths of the nut body and the stop flat washer 2 respectively, ensuring that the length of each section of raw material is consistent. The alloy steel material can be carbon steel or stainless steel; S2: Forming: using a cold heading die and extruding through a cold heading machine, the nut body and the stop flat washer 2 are processed respectively; S3: Hole processing: Use a lathe to punch holes on the inner wall of the extruded nut to form a glue injection hole 5; S4: Glue injection: After the punched nut surface is cleaned and sprayed with oil, a thread locking agent is injected into the glue injection hole 5 using a glue injection machine or a glue injection gun; S5: Assembly: Use a laminating machine to partially coat the outside of the shockproof gasket 6, apply the isolation film 8, and use a press machine to press the shockproof gasket 6 into the thread. After press-fitting, the coated part blocks the glue injection hole 5.

[0030] In step S2, the cold heading die used for the nut body and the stop flat washer 2 is a complete set of design structures, which can realize complete set synchronous processing.

[0031] In step S3, the injection hole 5 is a curved hole. To simplify the processing technology, it can also be processed into an inclined hole inclined downward. It is necessary to ensure that the thread locking agent in the injection hole 5 can flow out downward.

[0032] In step S5, the isolation membrane 8 is partially covered to prevent the isolation membrane 8 from reducing the friction between the shockproof washer 6 and the nut 1. One side of the isolation membrane 8 is connected to the opening of the glue injection hole 5 to seal the glue injection hole 5.

[0033] In this embodiment, when in use, the stop flat washer 2 is first inserted into the bolt, and then the nut body is screwed in, and when screwing in, the flange 3 faces downward and butts against the stop flat washer 2; During the screwing process, the anti-vibration washer 6 is squeezed by the external thread of the bolt and moves upward. After moving up to the position along the avoidance groove 403, it is separated from the injection hole 5, and the thread locking agent flows out to fill the thread gap. Continue to screw until the right-handed helical teeth 702 on the flange 3 and the left-handed helical teeth 701 on the stop flat washer 2 are clamped together. During this process, the thread locking agent gradually flows in through the side grooves 703 to fill the gap between the left-handed helical teeth 701 and the right-handed helical teeth 702.

[0034] To summarize, the locking structure of the teeth between the stop flat washer and the flange is adopted to realize self-locking of the nut end. A combined structure of a shock-proof washer and a glue injection hole is arranged inside the nut. The thread locking agent is pre-injected into the glue injection hole, and the thread locking agent flows out by twisting to fill the gap, thereby achieving the effect of shock absorption and anti-retreat of the nut.

[0035] The above-described embodiments only express a certain implementation mode of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A shock-absorbing and anti-dropping nut, comprising a nut body and a stop flat washer (2), characterized in that: The nut body comprises a nut (1) and a flange surface (3), the nut (1) and the flange surface (3) are both provided with internal teeth (4), a glue injection hole (5) is provided in the flange surface (3), a shock-proof washer (6) is provided between the internal teeth (4), and latch teeth (7) are both provided on the flange surface (3) and the stop flat washer (2).

2. The shock-absorbing and anti-dropping nut according to claim 1, characterized in that: The nut (1) and the flange surface (3) are an integrally formed structure.

3. The shock-absorbing and anti-dropping nut according to claim 1, characterized in that: The internal teeth (4) comprise an upper thread (401) and a lower thread (402), and the tooth angle α of the lower thread (402) is less than 60°.

4. The shock-absorbing and anti-dropping nut according to claim 3, characterized in that: An escape groove (403) is provided between the upper thread (401) and the lower thread (402); the inner wall of the escape groove (403) is an inclined surface; and the effective number of turns of the upper thread (401) is greater than the effective number of turns of the lower thread (402).

5. The shock-absorbing and anti-dropping nut according to claim 4, characterized in that: The anti-vibration washer (6) is arranged in the avoidance groove (403) and is arranged close to the glue injection hole (5), and there is a certain gap between the upper end of the anti-vibration washer (6) and the avoidance groove (403).

6. The shock-absorbing and anti-dropping nut according to claim 1, characterized in that: The glue injection hole (5) is a blind hole, the opening end of the glue injection hole (5) is located inside the nut (1), and an isolation film (8) is covered between the glue injection hole (5) and the shockproof washer (6).

7. The shock-absorbing and anti-dropping nut according to claim 1, characterized in that: The two latching teeth (7) are respectively a left-handed helical tooth (701) and a right-handed helical tooth (702), and the two latching teeth (7) are mutually clamped after being matched.

8. The shock-absorbing and anti-dropping nut according to claim 7, characterized in that: The left-handed helical teeth (701) and the right-handed helical teeth (702) are respectively arranged on the stop flat washer (2) and the flange surface (3), and side grooves (703) are provided on the left-handed helical teeth (701) and the right-handed helical teeth (702).

9. A manufacturing process for a shock-absorbing and anti-dropping nut, applied to a shock-absorbing and anti-dropping nut according to claims 1 to 8, characterized in that: The following steps are involved: S1: Raw material preparation: Select alloy steel material with appropriate diameter and cut it into appropriate lengths of the nut body and the stop flat washer (2) respectively, ensuring that the length of each section of the raw material is consistent. The alloy steel material can be carbon steel or stainless steel; S2: Forming: using a cold heading die and extruding through a cold heading machine, the nut body and the stop flat washer (2) are respectively formed; S3: Hole processing: Use a lathe to punch holes on the inner wall of the extruded nut to form a glue injection hole (5); S4: Glue injection: After the nut surface is cleaned and sprayed with oil after drilling, a thread locking agent is injected into the glue injection hole (5) using a glue injection machine or glue injection gun; S5: Assembly: Use a laminating machine to partially coat the outside of the shockproof gasket (6), apply an isolation film (8), and use a press machine to press the shockproof gasket (6) into the thread. After press-fitting, the coated part seals the glue injection hole (5).

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