Lock bolt assembly and vehicle
By providing a limit groove and anti-loosening gasket on the bolt head, the problem of loose threaded fasteners is solved, and the anti-loosening effect under vibration conditions and labor-saving in the assembly process is achieved.
Patent Information
- Application Number
- CN202422286612.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-18
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-09-18
AI Technical Summary
In the prior art, threaded fasteners are prone to loosening in vehicles, resulting in safety hazards, and the anti-loosening effect of physical and chemical glues is limited and cannot be reused.
A lock-proof bolt assembly is designed, including a bolt body and a lock-proof gasket. The head of the bolt is equipped with a limiting groove. The lock-proof gasket can extend into the groove to form a snap-in connection, and is plastically deformed under the action of external forces to enhance friction and prevent loosening.
Effectively avoiding the bolt assembly loose under vibration conditions, improving the reliability and safety of the connection, reducing the need for screwing torque, and enhancing the labor-saving of the assembly process.
Smart Images
Figure CN223190804U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of anti-loosening bolts, and in particular, to an anti-loosening bolt assembly and a vehicle. Background Art
[0002] Threaded fasteners usually include bolts, nuts, screws, etc., which are mainly used to connect and fix two parts.
[0003] In vehicle production, threaded fasteners are used extensively to secure various assemblies and components, particularly in the chassis. Loosening and failure of these fasteners can cause serious safety incidents. Therefore, threaded fasteners in critical locations often require anti-loosening designs. In related technologies, glue is often applied to the threads to prevent loosening. However, this approach has limitations. Physical glue produces a low anti-loosening torque, and chemical glue bolts cannot be reused. Utility Model Content
[0004] An object of the present disclosure is to provide an anti-loosening bolt assembly and a vehicle to at least partially solve the problems existing in the related art.
[0005] In order to achieve the above-mentioned object, the present disclosure provides a locking bolt assembly for fixing parts to be fastened, the locking bolt assembly comprising:
[0006] A bolt body having a head and a rod connected to the head at one end, wherein the head is provided with a limiting slot; and
[0007] An anti-loosening gasket is sleeved on the rod portion, and is used to be cushioned between the head and the part to be fastened. The anti-loosening gasket is designed to be able to at least partially extend into the limiting groove to form a snap connection.
[0008] Optionally, the position of the anti-loosening gasket corresponding to the limiting groove can be plastically deformed under the action of external force to extend into the limiting groove.
[0009] Optionally, the anti-loosening gasket includes a gasket body and a convex ring formed at an outer edge of the gasket body and extending toward the head, and the head is used to at least partially extend into the convex ring.
[0010] The limiting groove is provided at a position close to the outer edge of the head, and the position of the convex ring corresponding to the limiting groove can be plastically deformed under the action of an external force to extend into the limiting groove.
[0011] Optionally, the protruding ring is made of metal material.
[0012] Optionally, a transition fillet is formed at the connection position between the gasket body and the convex ring.
[0013] Optionally, the head includes a nut and a flange attached to one side of the nut, the anti-loosening gasket is used to be arranged between the flange and the part to be fastened, and the limiting groove is opened on the flange.
[0014] Optionally, the limiting groove is opened at a position on the side edge of the flange away from the anti-loosening gasket.
[0015] Optionally, in the direction from inside to outside, the limiting groove is configured to be expanded.
[0016] Optionally, a surface of the anti-loosening gasket opposite to the head is coated with a friction coefficient stabilizer.
[0017] Optionally, a surface of the anti-loosening gasket facing the part to be fastened is provided with an anti-slip structure.
[0018] Optionally, the anti-slip structure includes a plurality of anti-slip ridges formed on the surface of the anti-loosening gasket.
[0019] Optionally, the plurality of anti-slip ridges are radially distributed on the surface of the anti-loosening gasket.
[0020] According to a second aspect of the present disclosure, a vehicle is provided, comprising a base, the part to be fastened, and the above-mentioned anti-loosening bolt assembly, wherein the anti-loosening bolt assembly is used to install the part to be fastened on the base.
[0021] Optionally, the base is a chassis.
[0022] With the above technical solution, during assembly, the anti-loosening washer is first placed on the part to be fastened, and then a preset torque is applied to the head or the nut used in conjunction with the anti-loosening bolt assembly to rotate it, so that the head can press the anti-loosening washer against the part to be fastened. Since the anti-loosening washer presses against the part to be fastened, there is a large friction between the two, which can prevent the anti-loosening washer from rotating relative to the fastened part under working conditions such as vibration. Moreover, since at least a portion of the anti-loosening washer can extend into the limiting groove of the head to form a snap-fit relationship, the head and the anti-loosening washer remain relatively stationary, thereby indirectly preventing the head from rotating relative to the part to be fastened, thereby achieving the anti-loosening effect of the bolt assembly.
[0023] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:
[0025] Figure 1 is a schematic diagram of an anti-loosening bolt assembly according to the present disclosure before assembly and use;
[0026] Figure 2 yes Figure 1 Schematic diagram of the anti-loosening bolt assembly shown in another angle before assembly and use;
[0027] Figure 3 yes Figure 1 , a front view of the anti-loosening bolt assembly in an assembled and used state;
[0028] Figure 4 yes Figure 1 , a top view of the anti-loosening bolt assembly along the axial direction, wherein the anti-loosening washer and the limiting groove do not form a clamping relationship;
[0029] Figure 5 yes Figure 1 The anti-loosening bolt assembly is shown in the top view along the axial direction, wherein the anti-loosening gasket and the limiting groove form a snap-fit relationship.
[0030] Description of Reference Numerals
[0031] 1-parts to be fastened; 2-head; 21-nut; 22-flange; 3-rod; 4-anti-loosening gasket; 41-gasket body; 42-convex ring; 43-transition fillet; 5-anti-slip ridge; 6-limiting groove. DETAILED DESCRIPTION
[0032] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.
[0033] In the present disclosure, unless otherwise stated, the directional words used, such as "inside" and "outside", can be defined based on the actual use direction of the relevant components, or can also be defined based on the structure of the relevant components themselves. For example: the position of the anti-loosening gasket corresponding to the limit groove can be plastically deformed under the action of external force to extend into the "inside" of the limit groove, and the "inside" here refers to the inside of the accommodating space of the limit groove; the anti-loosening gasket includes a gasket body and a convex ring formed at the "outer" edge position of the gasket body and extending toward the head direction, and the "outer edge" here refers to the edge of the gasket body away from the rod; in the "from inside to outside" direction, the limit groove is constructed in an expansion shape, and the "from inside to outside" here is based on the radial direction of the flange, that is, from inside to outside in the radial direction, that is, toward the direction away from the axis of the flange.
[0034] In addition, in this disclosure, the terms "first", "second", etc. are used to distinguish one element from another and do not have order or importance. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.
[0035] Reference Figure 1-Figure 5 The present disclosure exemplifies an anti-loosening bolt assembly for fixing a part 1 to be fastened. The part 1 to be fastened may refer to any component that needs to be connected by a bolt assembly, and the present disclosure does not limit this. The "pancake shape" in the figure is only shown as an example. The anti-loosening bolt assembly includes a bolt body having a head 2 and a rod 3 connected to the head 2 at one end, and an anti-loosening washer 4 sleeved on the rod 3. The head 2 is provided with a limiting groove 6, and the anti-loosening washer 4 is used to be cushioned between the head 2 and the part 1 to be fastened. The anti-loosening washer 4 is designed to be able to at least partially extend into the limiting groove 6 to form a snap connection.
[0036] It should be noted that in some embodiments, when torque is applied to the bolt body or its mating nut for tightening, the lock washer 4 can be engaged with the retaining groove 6, i.e., the two rotate synchronously. Alternatively, in other embodiments, the lock washer 4 can also be disengaged from the retaining groove 6 during this process, i.e., the two can rotate relative to each other, and this disclosure is not limited to this. The lock washer 4 can be inserted into the retaining groove 6, and the specific time of insertion is not limited in this disclosure.
[0037] The specific structure and location of the limiting groove 6 will be described below, and the present disclosure does not limit this. The limiting groove 6 can be opened on the head 2 at a later stage, or can be integrally formed with the head 2.
[0038] The present disclosure does not limit the specific structure of the anti-loosening gasket 4. It can be annular, or it can be groove-shaped including a convex ring as mentioned below, as long as it is arranged between the head 2 and the part to be fastened 1 and generates a large friction force between the part to be fastened 1.
[0039] By using the above technical solution, during assembly, the anti-loosening washer 4 is first placed on the part to be fastened 1, and then a preset torque is applied to the head 2 or the nut used in conjunction with the anti-loosening bolt assembly to rotate it, so that the head 2 can press the anti-loosening washer 4 against the part to be fastened 1. Since the anti-loosening washer 4 is pressed against the part to be fastened 1, there is a large friction between the two, which can prevent the anti-loosening washer 4 from rotating relative to the part to be fastened 1 under working conditions such as vibration. Moreover, since at least a portion of the anti-loosening washer 4 can extend into the limiting groove 6 of the head 2 to form a snap-fit relationship, the head 2 and the anti-loosening washer 4 can remain relatively stationary, thereby indirectly preventing the head 2 from rotating relative to the part to be fastened 1, thereby achieving the anti-loosening effect of the bolt assembly.
[0040] In the embodiment of the present disclosure, the position of the anti-loosening gasket 4 corresponding to the limiting groove 6 can be plastically deformed under the action of external force to extend into the limiting groove 6. The plastic deformation can be achieved by manual pressing, bending, etc., which can be achieved by tools or directly by hand. Figure 4 and Figure 5 ,in Figure 4 There is no snap-fitting relationship between the anti-loosening gasket 4 and the limiting groove 6. Figure 5 The anti-loosening gasket 4 is plastically deformed by applying an external force so as to extend into the limiting groove 6. With such a design, the anti-loosening gasket 4 can form a snap-fit relationship with the head 2 after plastic deformation, and when no external force is applied, the anti-loosening gasket 4 will not reset to release the aforementioned snap-fit relationship, thereby allowing the two to rotate synchronously. Moreover, due to the large friction between the anti-loosening gasket 4 and the part to be fastened 1, the rotation of the anti-loosening gasket 4 and the head 2 relative to the part to be fastened 1 can be effectively limited, thereby achieving an anti-loosening effect. In addition, this design of plastic deformation by applying an external force makes it possible for the anti-loosening gasket 4 and the limiting groove 6 to have no snap-fit relationship during the early stage of the torque application and tightening process. Therefore, when the head 2 rotates, the anti-loosening gasket 4 may not rotate with it or may only rotate a small amount, thereby protecting the surface of the part to be fastened 1 and preventing it from being scratched by the anti-loosening gasket 4 or the head 2. In addition, since the friction between the anti-loosening gasket 4 and the part 1 to be fastened is large, compared with the anti-loosening gasket 4 following the rotation, only controlling the head 2 to rotate relative to the anti-loosening gasket 4 can greatly reduce the required screwing torque, making the assembly process more labor-saving.
[0041] In addition to the aforementioned "plastic deformation" to achieve snap-fit, the anti-loosening gasket 4 can also be initially configured to have a portion configured to extend into the limiting groove 6. In this case, the head 2 and the anti-loosening gasket 4 are always in a snap-fit relationship. Alternatively, in some embodiments, the anti-loosening gasket 4 can also have a preset mechanical assembly, which is configured such that when a preset compressive force is applied to a portion of the assembly, other portions of the assembly automatically move into the limiting groove 6 to form a snap-fit connection.
[0042] The present disclosure does not limit the specific structure of the anti-loosening gasket 4. Figure 1 and Figure 2In an embodiment of the present disclosure, the anti-loosening gasket 4 may include a gasket body 41 and a protruding ring 42 formed at the outer edge of the gasket body 41 and extending toward the head 2. The head 2 is configured to at least partially extend into the protruding ring 42. A retaining groove 6 may be provided near the outer edge of the head 2. The position of the protruding ring 42 corresponding to the retaining groove 6 can be plastically deformed under the action of an external force to extend into the retaining groove 6. With this design, the protruding ring 42 provided on the outer periphery of the head 2 ensures that no matter which position the head 2 rotates to, the protruding ring 42 can be positioned corresponding to the retaining groove 6, thereby forming a snap-fitting relationship with the retaining groove 6. Furthermore, the plastic deformation occurs in the protruding ring 42 and does not affect the position of the gasket body 41. This allows the gasket body 41 to completely and completely mate with the part 1 to be fastened, thereby ensuring the reliability of the fixed connection to the part 1. It also increases the friction area between the gasket body 41 and the part 1 to be fastened, thereby improving the anti-loosening performance.
[0043] In the embodiment of the present disclosure, in order to allow the protruding ring 42 to deform and extend into the limiting groove 6 without being reset and breaking, the protruding ring 42 can be made of a metal material, such as steel. It can be constructed in a sheet shape so that it does not require a large external force to be plastically deformed.
[0044] Reference Figure 3 In the embodiment of the present disclosure, a transition fillet 43 can be formed at the connection between the gasket body 41 and the protruding ring 42. The design of the transition fillet 43 can reduce stress concentration at this location, thereby increasing the operational strength of the anti-loosening gasket 4. Furthermore, the anti-loosening gasket 4 can be stamped from an annular plate, and the design of the transition fillet 43 can reduce the difficulty of the stamping process.
[0045] Reference Figure 1 and Figure 2 In the embodiment of the present disclosure, the head 2 may include a nut 21 and a flange 22 attached to one side of the nut 21. The anti-loosening gasket 4 may be used to cushion between the flange 22 and the part 1 to be fastened. The limiting groove 6 may be provided on the flange 22. The limiting groove 6 provided on the flange 22 can prevent damage to the nut 21, thereby preventing the disassembly tool from applying torque thereto. In addition, Figure 1 and Figure 2 The flange bolt shown in FIG. 2 is more susceptible to micro-deformation than the nut 21, thus enabling a tighter locking and improved reliability. Furthermore, the flange 22 is configured to mate with the anti-loosening gasket 4. Due to its larger area and smoother surface, the flange 22 provides some protection for the anti-loosening gasket 4. The retaining groove 6 on the flange 22 can be formed using a cold heading die, which is highly efficient.
[0046] Reference Figure 2In the embodiment of the present disclosure, the limiting groove 6 can be opened at a position away from the anti-loosening gasket 4 on the side edge of the flange 22. Such a design makes it easy to bend the outer convex ring 42 inward to directly extend into the limiting groove 6, and the operation is convenient and quick. In addition, the limiting groove 6 is arranged away from the anti-loosening gasket 4, which can ensure the integrity of the contact surface between the flange 22 and the anti-loosening gasket 4, so that the anti-loosening gasket 4 can be better pressed to the part to be fastened 1, which is conducive to improving the assembly quality and stability. Specifically, the limiting groove 6 can be opened on the side of the flange 22 away from the anti-loosening gasket 4, and the opening of the limiting groove 6 can be radially outward and axially toward the side away from the anti-loosening gasket 4.
[0047] Further, refer to Figure 4 and Figure 5 In the embodiment of the present disclosure, the retaining groove 6 can be configured to expand from the inside outward. This design facilitates insertion of the locking gasket 4 and improves assembly efficiency. Furthermore, in the embodiment of the present disclosure, the retaining groove 6 can be configured with a certain opening slope to facilitate removal of the locking gasket 4.
[0048] In an embodiment of the present disclosure, the surface of the anti-loosening gasket 4 opposite to the head 2 can be coated with a friction coefficient stabilizer. A friction coefficient stabilizer generally refers to a lubricating coating agent used to reduce and stabilize the friction coefficient. On the one hand, it can reduce the friction coefficient, so that the head 2 can be more easily rotated relative to the anti-loosening gasket 4, which has the effect of saving effort during assembly. On the other hand, it can ensure that the friction surface maintains a specific friction coefficient value and controls the discreteness of the friction coefficient within a very small deviation range, even if the friction coefficient between the head 2 and the anti-loosening gasket 4 in all the anti-loosening bolt assemblies in the production process is stabilized within a range, so that the output torque can be set according to the clamping force to be applied to the fastened part 1 when the bolt assembly is assembled, ensuring that each anti-loosening bolt assembly can meet the assembly requirements under the action of the output torque during assembly, thereby improving work efficiency and improving assembly quality.
[0049] The "clamping force" here can also refer to the thrust exerted by the head 2 on the lock washer 4 during the tightening of the bolt assembly. The bolt assembly can be used alone or in conjunction with a nut. The applied torque can act directly on the head 2 or on the nut, thereby causing the head 2 to generate the aforementioned "clamping force" on the lock washer 4 and the part to be fastened 1. This "clamping force" can press the lock washer 4 against the part to be fastened 1, thereby achieving a fixed installation of the part to be fastened 1. The aforementioned "clamping force" can be adaptively designed according to the installation requirements of the part to be fastened 1, for example, 2000N, 5000N, etc. During actual assembly, it can be controlled by controlling the torque value output by an electric tool such as an electric wrench or electric screwdriver.
[0050] In the embodiment of the present disclosure, the surface of the anti-loosening washer 4 facing the part to be fastened 1 can be provided with an anti-slip structure. The anti-slip structure can increase the friction between the anti-loosening washer 4 and the part to be fastened 1, thereby improving the stability of the anti-loosening effect.
[0051] The present disclosure does not limit the specific form of the anti-slip structure. Figure 1 In the illustrated embodiment, the anti-slip structure may include a plurality of anti-slip ribs 5 formed on the surface of the anti-loosening gasket 4. The number of anti-slip ribs 5 may be 10, 20, and the like. By providing the anti-slip ribs 5, the friction between the anti-loosening gasket 4 and the part to be fastened 1 can be increased, thereby improving the stability of the anti-loosening effect. In the embodiment of the present disclosure, the anti-slip ribs 5 can be formed by a cold heading die, which is more efficient. In addition to the anti-slip ribs 5, in some other embodiments, the anti-slip structure may also include a rubber pad that can increase the friction provided on the surface of the anti-loosening gasket 4 opposite to the part to be fastened 1. Alternatively, it may also include anti-slip lines and the like provided on the surface of the anti-loosening gasket 4 opposite to the part to be fastened 1.
[0052] The present disclosure does not limit the structure and arrangement of the anti-slip ribs 5. For example, Figure 1 In the illustrated embodiment, the plurality of anti-slip ribs 5 can be radially distributed evenly on the surface of the anti-loosening gasket 4. This arrangement allows the anti-slip ribs 5 to be distributed as evenly as possible at various locations on the anti-loosening gasket 4, thereby improving the anti-slip effect. In addition, in other embodiments, the anti-slip ribs 5 can also be configured in a curved shape, a broken line, etc., and their distribution can also be non-uniform. This disclosure is not limited to this, as long as the anti-slip effect can be achieved.
[0053] Furthermore, in some embodiments, the surface of the part 1 to be fastened that is opposite the plurality of anti-slip ribs 5 may be provided with an anti-slip groove (not shown) into which at least a portion of the anti-slip ribs 5 extend. By partially extending the anti-slip ribs 5 into the anti-slip groove, the anti-slip ribs 5 and the anti-slip groove can form a locking relationship, thereby restricting the anti-loosening gasket 4 from rotating relative to the part 1 to be fastened. Specifically, the number of anti-slip ribs 5 extending into the anti-slip groove can be two, three, or the like.
[0054] According to the second aspect of the present disclosure, a vehicle is provided, comprising a base, a part 1 to be fastened and the above-mentioned anti-loosening bolt assembly, wherein the anti-loosening bolt assembly is used to install the part 1 to be fastened on the base. Since the vehicle has all the beneficial effects of the above-mentioned anti-loosening bolt assembly, they are not repeated here.
[0055] In some embodiments, the base may be a chassis. In this case, the part 1 to be fastened may be a chassis accessory, which is fixed to the chassis by an anti-loosening bolt assembly, thereby improving the assembly reliability of the chassis position of the vehicle and avoiding loosening.
[0056] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.
[0057] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.
[0058] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.
Claims
1. A locking bolt assembly for fixing parts to be fastened, characterized in that: The anti-loosening bolt assembly includes: A bolt body having a head and a rod connected to the head at one end, wherein the head is provided with a limiting slot; and An anti-loosening gasket is sleeved on the rod portion, and is used to be cushioned between the head and the part to be fastened. The anti-loosening gasket is designed to be able to at least partially extend into the limiting groove to form a snap connection.
2. The anti-loosening bolt assembly according to claim 1, characterized in that: The position of the anti-loosening gasket corresponding to the limiting groove can be plastically deformed under the action of external force to extend into the limiting groove.
3. The anti-loosening bolt assembly according to claim 2, characterized in that: The anti-loosening gasket includes a gasket body and a convex ring formed at the outer edge of the gasket body and extending toward the head, and the head is used to at least partially extend into the convex ring. The limiting groove is provided at a position close to the outer edge of the head, and the position of the convex ring corresponding to the limiting groove can be plastically deformed under the action of an external force to extend into the limiting groove.
4. The anti-loosening bolt assembly according to claim 3, characterized in that: The convex ring is made of metal material.
5. The anti-loosening bolt assembly according to claim 3, characterized in that: A transition fillet is formed at a connection position between the gasket body and the convex ring.
6. The anti-loosening bolt assembly according to any one of claims 1 to 5, characterized in that: The head includes a nut and a flange attached to one side of the nut, the anti-loosening gasket is used to be arranged between the flange and the part to be fastened, and the limiting groove is opened on the flange.
7. The anti-loosening bolt assembly according to claim 6, characterized in that: The limiting groove is arranged at a position on the side edge of the flange away from the anti-loosening gasket.
8. The anti-loosening bolt assembly according to claim 7, characterized in that: In the direction from inside to outside, the limiting groove is configured to be expanded.
9. The anti-loosening bolt assembly according to claim 1, characterized in that: A surface of the anti-loosening washer opposite to the head is coated with a friction coefficient stabilizer.
10. The anti-loosening bolt assembly according to claim 1, characterized in that: The surface of the anti-loosening gasket facing the part to be fastened is provided with an anti-slip structure.
11. The anti-loosening bolt assembly according to claim 10, characterized in that: The anti-slip structure includes a plurality of anti-slip ridges formed on the surface of the anti-loosening gasket.
12. The anti-loosening bolt assembly according to claim 11, characterized in that: The plurality of anti-slip ridges are radially distributed on the surface of the anti-loosening gasket.
13. A vehicle, characterized in that: The invention comprises a base, the part to be fastened and an anti-loosening bolt assembly according to any one of claims 1 to 12, wherein the anti-loosening bolt assembly is used to install the part to be fastened on the base.
14. The vehicle according to claim 13, characterized in that The base is a chassis.