Wear-resistant eccentric bolt with high installation precision

Abstract

The utility model provides a kind of high installation precision wear-resistant eccentric bolt belongs to fastener technical field.It solves the problem of insufficient adjustment accuracy of existing eccentric bolt etc..The present installation precision high wear-resistant eccentric bolt includes bolt body, the outer surface of bolt body is movably sleeved with eccentric washer, the top of the front surface of eccentric washer is provided with scale groove, and bolt body includes screw rod, the front side of screw rod is fixedly connected with bolt head, the rear side surface of bolt head is fixedly connected with anti-loosening tooth, and the rear side between bolt head and screw rod is fixedly connected with reinforcing rib.The utility model is used in cooperation with eccentric washer, scale groove, reinforcing rib, anti-loosening tooth and anti-skid line, has the advantage that visual adjustment can be realized, repeated measurement is not needed, adjustment efficiency is improved, stress stability is improved, and service life is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of fastener technology, and relates to an eccentric bolt, and particularly to a wear-resistant eccentric bolt with high installation accuracy. Background Technology

[0002] An eccentric bolt is a specially designed fastener whose thread axis is offset from the geometric center. It can produce millimeter-level displacement by rotation and is used to adjust the gap or angle of mechanical parts. It is widely used in scenarios that require fine adjustment of assembly gaps or coaxiality, such as machine tool guideways, automobile chassis suspension systems, and engineering machinery connecting parts.

[0003] For example, Chinese patent literature discloses an easily adjustable eccentric bolt structure [Application No.: 202222316729.2; Authorization Announcement No.: CN218440139U], which includes an eccentric bolt body, a bolt shank, an eccentric disc, a through hole, a limiting protrusion on the inner wall of the through hole, a positioning groove, and an adjusting nut. The adjusting nut includes a nut body; the nut body is connected to the eccentric disc through a plug-in part; a fastening nut is also provided on the bolt shank; the fastening nut is screwed onto the bolt shank; and the side of the fastening nut fits against the side of the adjusting nut.

[0004] The aforementioned easily adjustable eccentric bolt structure ensures the linkage between the two ends of the eccentric bolt structure through adjusting the fit between the nut and the eccentric disc. However, it relies on the operator's experience to judge the eccentricity, lacks a visual positioning reference, and requires repeated disassembly and measurement during adjustment. This is not only inefficient but also prone to human error causing the eccentricity deviation to exceed the design tolerance. Furthermore, the connection between the hexagonal head of the bolt and the shaft has low strength, resulting in poor stress stability during wrench tightening and a tendency to break under long-term stress. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a high-precision, wear-resistant eccentric bolt that enables visual adjustment, eliminates the need for repeated measurements, improves adjustment efficiency, enhances stress stability, and extends service life.

[0006] The purpose of this utility model can be achieved through the following technical solution: a wear-resistant eccentric bolt with high installation accuracy, comprising a bolt body, an eccentric washer movably sleeved on the outer surface of the bolt body, a scale groove being formed on the top of the front surface of the eccentric washer, the bolt body comprising a screw rod, a bolt head being fixedly connected to the front side of the screw rod, anti-loosening teeth being fixedly connected to the rear surface of the bolt head, and a reinforcing rib being fixedly connected between the rear side of the bolt head and the screw rod.

[0007] This high-precision wear-resistant eccentric bolt, through the combined use of eccentric washers, graduated grooves, reinforcing ribs, anti-loosening teeth, and anti-slip textures, offers advantages such as enabling visual adjustment, eliminating the need for repeated measurements, improving adjustment efficiency, enhancing stress stability, and extending service life.

[0008] In the aforementioned high-precision wear-resistant eccentric bolt, a guide cone is fixedly connected to the rear side of the screw, and the guide cone and the screw are integrally formed. By providing the guide cone, the bolt can be quickly inserted into the mounting hole of the connected component.

[0009] In the aforementioned high-precision wear-resistant eccentric bolt, there are several graduated grooves arranged at equal intervals, with an included angle of 10° between adjacent grooves. A positioning countersunk groove is formed on the upper surface of the bolt. By setting the positioning countersunk groove, a precise positioning reference can be provided, error prevention and mitigation can be achieved, assembly tools can be adapted, and stress can be distributed, ensuring consistent eccentricity and accurate positioning during bolt assembly.

[0010] In the aforementioned high-precision wear-resistant eccentric bolt, there are several anti-loosening teeth evenly distributed at 360°, and the outer surface of each anti-loosening tooth has a groove. By setting anti-loosening teeth, the friction between the bolt and the eccentric washer can be increased and locked after the bolt is tightened, effectively preventing loosening during mechanical component vibration.

[0011] In the aforementioned high-precision wear-resistant eccentric bolt, there are eight reinforcing ribs arranged at 360° equidistant intervals, and the rear side of the outer surface of the bolt is threaded.

[0012] In the aforementioned high-precision wear-resistant eccentric bolt, the reinforcing rib, bolt head, anti-loosening teeth, and screw are integrally formed, and the rear surface of the eccentric washer is provided with anti-slip texture. By setting the anti-slip texture, the friction between the eccentric washer and the contact surface of the mechanical parts can be increased, thereby improving the connection stability.

[0013] Compared with existing technologies, this high-precision wear-resistant eccentric bolt, through the combined use of eccentric washers, graduated grooves, reinforcing ribs, anti-loosening teeth, and anti-slip patterns, has the advantages of enabling visual adjustment, eliminating the need for repeated measurements, improving adjustment efficiency, enhancing stress stability, and extending service life. Attached Figure Description

[0014] Figure 1 This is an axonometric view of the structure of this utility model.

[0015] Figure 2 This is a rear axonometric view of the bolt body of this utility model.

[0016] Figure 3 This utility model Figure 2A magnified view of A in the middle.

[0017] Figure 4 This is a rear axonometric view of the eccentric gasket of this utility model.

[0018] In the diagram: 1. Bolt body; 2. Eccentric washer; 3. Scale groove; 4. Reinforcing rib; 5. Bolt head; 6. Screw; 7. Thread; 8. Guide cone; 9. Anti-loosening teeth; 10. Anti-slip texture; 11. Positioning groove. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this high-precision wear-resistant eccentric bolt includes a bolt body 1, which is made of 10.9 grade high-strength alloy steel. The surface can be coated with zinc-aluminum coating with a coating thickness of 10-20μm. An eccentric washer 2 is movably fitted on the outer surface of the bolt body 1. The top of the front surface of the eccentric washer 2 is provided with a graduated groove 3 (width 0.1mm±0.02mm, depth 0.15mm±0.03mm, and black anodized). The bolt body 1 includes a screw 6. A bolt head 5 is fixedly connected to the front side of the screw 6. Anti-loosening teeth 9 are fixedly connected to the rear surface of the bolt head 5. A reinforcing rib 4 is fixedly connected between the rear side of the bolt head 5 and the screw 6.

[0021] In actual manufacturing, a guide cone 8 is fixedly connected to the rear side of the screw 6. The cone angle is 30°, the cone length is 5mm, and the end of the cone is provided with a radius of 1mm. The guide cone 8 and the screw 6 are integrally formed.

[0022] There are several graduated grooves 3, which are arranged at equal intervals, and the included angle between adjacent graduated grooves 3 is 10°. The upper surface of the screw 6 is provided with a positioning groove 11. There are several anti-loosening teeth 9, which are evenly distributed in 360°, and the outer surface of the anti-loosening teeth 9 is provided with tooth grooves.

[0023] There are eight reinforcing ribs 4, which are arranged at 360° equidistant intervals. The rear side of the outer surface of the screw 6 is provided with threads 7. The reinforcing ribs 4, bolt heads 5, anti-loosening teeth 9 and screw 6 are integrally formed structures. The rear surface of the eccentric washer 2 is provided with anti-slip textures 10.

[0024] When this bolt is used to adjust the gap between mechanical parts, the operator can directly read the eccentricity corresponding to the rotation angle through the scale groove 3 on the surface of the eccentric shim 2 (e.g., 1 rotation = 0.05mm eccentricity adjustment). A single adjustment can meet the accuracy requirements, realizing visual adjustment without repeated measurement, thus improving adjustment efficiency. By evenly setting eight reinforcing ribs 4 at the connection between the bolt head 5 and the screw 6, the connection firmness is effectively improved, making it more stable under force and preventing deformation of the rod when tightened.

[0025] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this invention or exceeding the scope defined by the appended claims.

Claims

1. A wear-resistant eccentric bolt with high installation accuracy, comprising a bolt body (1), characterized in that: An eccentric washer (2) is movably fitted on the outer surface of the bolt body (1). A scale groove (3) is opened on the top of the front surface of the eccentric washer (2). The bolt body (1) includes a screw (6). A bolt head (5) is fixedly connected to the front side of the screw (6). Anti-loosening teeth (9) are fixedly connected to the rear side surface of the bolt head (5). A reinforcing rib (4) is fixedly connected between the rear side of the bolt head (5) and the screw (6).

2. The wear-resistant eccentric bolt with high installation accuracy according to claim 1, characterized in that: The screw (6) is fixedly connected to a guide cone (8) on its rear side, and the guide cone (8) and the screw (6) are integrally formed.

3. The wear-resistant eccentric bolt with high installation accuracy according to claim 1, characterized in that: The number of the scale grooves (3) is several, and they are arranged at equal intervals. The included angle between adjacent scale grooves (3) is 10°. The upper surface of the screw (6) is provided with a positioning groove (11).

4. The wear-resistant eccentric bolt with high installation accuracy according to claim 1, characterized in that: The number of anti-loosening teeth (9) is several, and they are evenly distributed in 360°. The outer surface of the anti-loosening teeth (9) is provided with tooth grooves.

5. The wear-resistant eccentric bolt with high installation accuracy according to claim 1, characterized in that: The number of the reinforcing ribs (4) is eight, and they are arranged at 360° equidistantly. The screw (6) has a thread (7) on the rear side of its outer surface.

6. The wear-resistant eccentric bolt with high installation accuracy according to claim 1, characterized in that: The reinforcing rib (4), bolt head (5), anti-loosening tooth (9) and screw (6) are integrally formed structures, and the rear surface of the eccentric gasket (2) is provided with anti-slip texture (10).

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