Anti-vibration eccentric bolt for automobile engine support
By designing a combined structure of bolts, concave nuts, and convex nuts, and utilizing elastic washers and inner and outer conical surfaces, the problem of complex and easily loosened existing anti-vibration eccentric bolt structures was solved, achieving a stable connection and improved vibration resistance of the engine mount.
Patent Information
- Application Number
- CN202520513488.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-24
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-03-24
AI Technical Summary
Existing anti-vibration eccentric bolts have complex structures and insignificant anti-vibration effects, are prone to loosening, and cannot effectively improve the connection stability of engine mounts.
A structure including a bolt, a concave nut, and a convex nut is designed. The concave nut is provided with an elastic washer and an inner conical surface, while the convex nut is provided with an outer conical surface and a nylon ring. The elastic washer provides axial force and shear force, the inner and outer conical surfaces cooperate to achieve locking, and the nylon ring increases friction to prevent loosening.
It achieves a simple structure, good vibration resistance, effectively prevents bolt loosening, and improves the connection stability and service life of the engine bracket.
Smart Images
Figure CN223854636U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of fastener technology, and specifically relates to an anti-vibration eccentric bolt for automobile engine brackets. Background Technology
[0002] Vibration-resistant eccentric bolts are widely used in various applications requiring vibration resistance, particularly in machinery, automotive, and bridge manufacturing. Their unique design effectively reduces the impact of vibration on the connection, improving its stability and reliability.
[0003] Vibration-resistant eccentric bolts are specially designed bolts primarily used to reduce the impact of vibration on connectors, improving the stability and reliability of the connection. Through their unique structural design, these bolts effectively absorb and disperse vibration energy, thereby reducing the impact of vibration on the connectors.
[0004] Currently, the nuts used with vibration-resistant eccentric bolts mainly consist of a lower nut body and an upper nut body. The lower nut body has a vibration-absorbing groove at its end, and an axial vibration-absorbing pad is installed inside. The upper nut body has an annular groove inside, and a radial vibration-absorbing ring is installed inside. The axial vibration-absorbing pad is used to reduce axial vibration and impact, and can absorb and disperse vibration energy during equipment operation. The radial vibration-absorbing ring consumes this vibration energy through damping characteristics, thereby reducing the impact of vibration on the connecting parts. However, this structure is not only complex to install, but also has an insignificant vibration-resistant effect. Once the internal components fail, the vibration-resistant function will be lost, and the bolts will loosen over time.
[0005] Therefore, the above-mentioned problems have become technical issues that urgently need to be solved. Utility Model Content
[0006] Purpose of the utility model: In order to overcome the above shortcomings, this utility model provides an anti-vibration eccentric bolt for automobile engine brackets, which improves the connection stability of the engine bracket and ensures vehicle driving safety.
[0007] Technical solution: In order to achieve the above objectives, this utility model provides an anti-vibration eccentric bolt for automobile engine brackets, including a bolt, an inner concave nut, and an outer convex nut;
[0008] The bolt includes a head and a shank, the centerline of the shank does not coincide with the centerline of the head, and the shank has an external thread along its entire length;
[0009] The concave nut has a threaded hole at its center that mates with the external thread, and one end of the concave nut has an elastic washer, while the other end has an inner conical surface that is recessed into the threaded hole.
[0010] The center of the outer convex nut is provided with a threaded hole matched with the outer thread, and the end face of one end of the outer convex nut is provided with an outer convex outer taper surface matched with the inner taper surface.
[0011] The elastic gasket provides an axial force and a shearing force for the inner recessed nut, prevents loosening of the threaded connection between the inner recessed nut and the bolt, the outer convex nut and the inner recessed nut form a double-nut locking to further prevent loosening, the inner taper surface and the outer taper surface are matched to lock the outer convex nut and further lock the inner recessed nut to prevent loosening.
[0012] Further, the inner wall of the outer taper surface is embedded with a nylon ring.
[0013] Further, the nylon ring is coated with an anti-corrosion coating to prevent aging and damage of the nylon ring and improve the service life.
[0014] Further, the head is provided with an inner hexagon or an outer hexagon.
[0015] Further, the inner recessed nut and the outer convex nut are both outer hexagon nuts.
[0016] Further, the edge of the elastic gasket is serrated and downwardly inclined.
[0017] Further, the hardness of the outer taper surface is lower than that of the inner taper surface.
[0018] The above technical solution can have the following beneficial effects:
[0019] The anti-vibration eccentric bolt for the automobile engine support has the advantages of simple structure, reasonable design, three aspects of anti-vibration and anti-loosening, an elastic gasket integrally designed on the inner recessed nut, the elastic gasket providing an axial force and a shearing force for the inner recessed nut after being tightened to prevent loosening of the threaded connection between the inner recessed nut and the bolt, the outer convex nut being screwed into the inner recessed nut to prevent loosening through double nuts, the inner taper surface designed on the inner recessed nut being matched with the outer taper surface on the outer convex nut, the outer taper surface being compressed into the inner taper surface, the hardness of the outer taper surface being lower than that of the inner taper surface, the outer taper surface being deformed to press the nylon ring on the outer thread, radial vibration being converted into axial force under the action of the outer taper surface and the inner taper surface, and good anti-vibration performance being achieved. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 The anti-vibration eccentric bolt for the automobile engine support has the advantages of simple structure, reasonable design, three aspects of anti-vibration and anti-loosening, an elastic gasket integrally designed on the inner recessed nut, the elastic gasket providing an axial force and a shearing force for the inner recessed nut after being tightened to prevent loosening of the threaded connection between the inner recessed nut and the bolt, the outer convex nut being screwed into the inner recessed nut to prevent loosening through double nuts, the inner taper surface designed on the inner recessed nut being matched with the outer taper surface on the outer convex nut, the outer taper surface being compressed into the inner taper surface, the hardness of the outer taper surface being lower than that of the inner taper surface, the outer taper surface being deformed to press the nylon ring on the outer thread, radial vibration being converted into axial force under the action of the outer taper surface and the inner taper surface, and good anti-vibration performance being achieved.
[0021] Figure 2The utility model discloses a bolt's plan view.
[0022] Figure 3 The utility model discloses a recessed nut's structure diagram.
[0023] Figure 4 The utility model discloses a recessed nut's structure diagram.
[0024] In the drawing: 1-bolt, 11-head, 12-screw rod, 2-recessed nut, 21-elastic gasket, 22-inner taper surface, 3-outer convex nut, 31-outer taper surface, 32-nylon ring. DETAILED DESCRIPTION
[0025] It should be understood that the specific embodiments described herein are merely exemplary and not intended to limit the utility model.
[0026] As Figures 1-4 shown: a kind of eccentric bolt for resisting vibration of automobile engine support, including bolt 1, recessed nut 2 and outer convex nut 3;
[0027] The bolt 1 includes head 11 and screw rod 12, the center line of the screw rod 12 does not coincide with the center line of the head 11, and the screw rod 12 is provided with external threads throughout the length;
[0028] The recessed nut 2 is provided with a threaded hole matched with the external threads in the center, one end of the recessed nut 2 is provided with an elastic gasket 21, and the other end is provided with an inner taper surface 22 recessed into the threaded hole;
[0029] The outer convex nut 3 is provided with a threaded hole matched with the external threads in the center, and the end face of one end of the outer convex nut 3 is provided with an outer convex outer taper surface 31, which can be matched with the inner taper surface 22.
[0030] Among them, the outer taper surface 31 inner wall is embedded with nylon ring 32. The nylon ring 32 is coated with a corrosion-resistant coating. The nylon ring 32 is in contact with the external threads to increase the friction, and the outer convex nut 3 can be firmly locked on the screw rod 12.
[0031] Preferably, the head 11 is provided with an inner hexagonal or outer hexagonal structure, and the recessed nut 2 and the outer convex nut 3 are both outer hexagonal nuts.
[0032] Specifically, the edge of the elastic gasket 21 is serrated, and the serrated edge is inclined downward.
[0033] In addition, the hardness of the outer taper surface 31 is lower than that of the inner taper surface 22.
[0034] The anti-vibration eccentric bolt in the embodiment realizes anti-vibration and anti-loosening in three aspects, the elastic gasket 21 is designed on the inner recessed nut 2, the elastic gasket can provide axial force and shearing force for the inner recessed nut 2 after being tightened, so that the inner recessed nut 2 is not easy to be loosened in cooperation with the thread of the screw rod 12; the outer convex nut 3 is screwed into the inner recessed nut 2 to realize anti-loosening by double nuts, but the axial anti-vibration capability is still not ideal for the connection of the engine support. The inner taper surface 22 designed on the inner recessed nut 2 cooperates with the outer taper surface 31 on the outer convex nut 3, the outer taper surface 31 is compressed with the outer taper surface 31 being screwed into the inner taper surface 22, the outer taper surface 31 is deformed due to the hardness of the outer taper surface 31 being lower than that of the inner taper surface 22, so that the nylon ring 32 is pressed on the outer thread, for the radial vibration, the axial force is converted under the action of the outer taper surface 31 and the inner taper surface 22, so that the good anti-vibration performance is realized.
[0035] The anti-vibration eccentric bolt for the automobile engine support provided by the utility model realizes anti-vibration and anti-loosening in three aspects, the elastic gasket 21 is designed on the inner recessed nut 2, the elastic gasket can provide axial force and shearing force for the inner recessed nut 2 after being tightened, so that the inner recessed nut 2 is not easy to be loosened in cooperation with the thread of the screw rod 12; the outer convex nut 3 is screwed into the inner recessed nut 2 to realize anti-loosening by double nuts, but the axial anti-vibration capability is still not ideal for the connection of the engine support. The inner taper surface 22 designed on the inner recessed nut 2 cooperates with the outer taper surface 31 on the outer convex nut 3, the outer taper surface 31 is compressed with the outer taper surface 31 being screwed into the inner taper surface 22, the outer taper surface 31 is deformed due to the hardness of the outer taper surface 31 being lower than that of the inner taper surface 22, so that the nylon ring 32 is pressed on the outer thread, for the radial vibration, the axial force is converted under the action of the outer taper surface 31 and the inner taper surface 22, so that the good anti-vibration performance is realized.
[0036] The anti-vibration eccentric bolt for the automobile engine support provided by the utility model realizes anti-vibration and anti-loosening in three aspects, the elastic gasket 21 is designed on the inner recessed nut 2, the elastic gasket can provide axial force and shearing force for the inner recessed nut 2 after being tightened, so that the inner recessed nut 2 is not easy to be loosened in cooperation with the thread of the screw rod 12; the outer convex nut 3 is screwed into the inner recessed nut 2 to realize anti-loosening by double nuts, but the axial anti-vibration capability is still not ideal for the connection of the engine support. The inner taper surface 22 designed on the inner recessed nut 2 cooperates with the outer taper surface 31 on the outer convex nut 3, the outer taper surface 31 is compressed with the outer taper surface 31 being screwed into the inner taper surface 22, the outer taper surface 31 is deformed due to the hardness of the outer taper surface 31 being lower than that of the inner taper surface 22, so that the nylon ring 32 is pressed on the outer thread, for the radial vibration, the axial force is converted under the action of the outer taper surface 31 and the inner taper surface 22, so that the good anti-vibration performance is realized.
Claims
1. An anti-vibration eccentric bolt for an automobile engine support, characterized by, The bolt (1), the inner recessed nut (2) and the outer convex nut (3) are included. The bolt (1) includes a head (11) and a screw rod (12), the center line of the screw rod (12) is not coincident with the center line of the head (11), and the screw rod (12) is provided with external threads along the length direction; The inner recessed nut (2) is provided with a threaded hole in the center for matching the external threads, one end of the inner recessed nut (2) is provided with an elastic gasket (21), and the other end is provided with an inner tapered surface (22) recessed into the threaded hole; The outer convex nut (3) is provided with a threaded hole in the center for matching the external threads, the end face of one end of the outer convex nut (3) is provided with an outer convex outer tapered surface (31), and the outer tapered surface (31) can match the inner tapered surface (22).
2. The anti-oscillation eccentric bolt for an automobile engine support according to claim 1, wherein The inner wall of the outer tapered surface (31) is embedded with a nylon ring (32).
3. The anti-oscillation eccentric bolt for an automobile engine support according to claim 2, wherein The nylon ring (32) is coated with an anticorrosive coating.
4. The anti-oscillation eccentric bolt for use in an engine mount of an automobile as set forth in claim 1, wherein The head (11) is provided with an inner hexagon or an outer hexagon.
5. The anti-oscillation eccentric bolt for use in an engine mount of an automobile as set forth in claim 1, wherein The inner recessed nut (2) and the outer convex nut (3) are both outer hexagon nuts.
6. The anti-oscillation eccentric bolt for use in an engine mount of an automobile as set forth in claim 1, wherein The edge of the elastic gasket (21) is serrated, and the serrated edge is downwardly inclined.
7. The anti-oscillation eccentric bolt for use in an engine mount of an automobile as defined in claim 1, wherein The hardness of the outer tapered surface (31) is lower than that of the inner tapered surface (22).