Bushing for spring eye of plate spring

Abstract

The utility model discloses a leaf spring eye bushing which comprises an inner sleeve, an outer sleeve and a rubber body, the rubber body is integrally formed between the inner sleeve and the outer sleeve through vulcanization, and one end of the rubber body sinks inwards relative to the inner sleeve and the outer sleeve and forms an annular concave cavity. Two cavities extending from the bottom face of the annular concave cavity to the other end of the rubber body are formed in the rubber body, the two cavities are symmetrically arranged relative to the center line of the rubber body, and a protruding edge is arranged on the inner wall of the side, close to the inner sleeve, of each cavity. Vertical vibration of the plate spring can be well attenuated, the transverse rigidity of the plate spring can be well kept, and reasonable balance is achieved; in addition, the deformation quantity of inward contraction of the rubber body can be limited, and the service life of the plate spring eye bushing can be kept.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a leaf spring ear bushing. Background Art

[0002] A common automotive component, a leaf spring lug bushing is typically installed in the lug of a leaf spring. A leaf spring pin is inserted into and secured within the lug bushing. The lug bushing cushions the impact of the leaf spring on the pin and attenuates vibrations transmitted from the leaf spring to the pin, thereby improving the ride comfort of the vehicle.

[0003] Existing leaf spring ear bushings usually include a coaxially arranged inner sleeve, an outer sleeve and a rubber body, wherein the rubber body is integrally formed between the inner sleeve and the outer sleeve by vulcanization, and one end of the rubber body is recessed inward relative to the inner sleeve and the outer sleeve to form an annular cavity. By utilizing this annular cavity, the rubber body can produce a certain degree of deformation, thereby attenuating the vertical vibration of the leaf spring and maintaining the lateral stiffness of the leaf spring.

[0004] However, if the above-mentioned technical means of providing an annular cavity at one end of the rubber body is to effectively attenuate the vertical vibration of the leaf spring, the depth of the annular cavity needs to be deep enough; if the purpose of effectively maintaining the lateral stiffness of the leaf spring is to be achieved, the depth of the annular cavity cannot be too deep. This will lead to a contradiction and become a problem that needs to be solved urgently. Utility Model Content

[0005] The purpose of the utility model is to overcome the defects and shortcomings of the existing technology and provide a leaf spring ear bushing that can not only effectively attenuate the vertical vibration of the leaf spring, but also effectively maintain the lateral stiffness of the leaf spring to achieve a reasonable balance; in addition, it can also limit the inward contraction deformation of the rubber body, so as to help maintain the service life of the leaf spring ear bushing.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A leaf spring ear bushing comprises an inner sleeve, an outer sleeve and a rubber body, wherein the rubber body is integrally formed between the inner sleeve and the outer sleeve by vulcanization, and one end of the rubber body is recessed inward relative to the inner sleeve and the outer sleeve to form an annular cavity, characterized in that two cavities are respectively provided inside the rubber body, extending from the bottom surface of the annular cavity toward the other end of the rubber body, the two cavities are symmetrically arranged about the center line of the rubber body, and each cavity has a convex ridge on the inner wall on the side close to the inner sleeve.

[0008] Furthermore, each cavity is in an arc shape along the circumference of the rubber body.

[0009] Furthermore, the total depth of the annular cavity and the single cavity is at least greater than half the length of the rubber body.

[0010] Furthermore, the other end of the rubber body protrudes outward relative to the outer sleeve and forms a protrusion.

[0011] Furthermore, the inner side of the protrusion is recessed inwards near the inner sleeve and forms an annular groove.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The utility model is based on the existing annular cavity, and two symmetrical cavities are respectively arranged inside the rubber body. When assembled, the two cavities are arranged up and down, and the depth of the annular cavity can be extended on the upper and lower sides, and the depth of the annular cavity does not need to be designed to be too deep. It can not only effectively attenuate the vertical vibration of the leaf spring, but also effectively maintain the lateral stiffness of the leaf spring, achieving a reasonable balance. In addition, each cavity has a convex ridge on the inner wall on the side close to the inner sleeve, which is used to limit the deformation of the rubber body inward contraction, which is beneficial to maintaining the service life of the leaf spring ear bushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural front view of the present utility model.

[0015] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of part A.

[0016] Figure 3 for Figure 1 Structural cross-section view along AA direction. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See also Figure 1-3A leaf spring ear bushing includes an inner sleeve 1, an outer sleeve 2 and a rubber body 3. The rubber body 3 is integrally formed between the inner sleeve 1 and the outer sleeve 2 by vulcanization. One end of the rubber body 3 is recessed inward relative to the inner sleeve 1 and the outer sleeve 2 and forms an annular concave cavity 4. The interior of the rubber body 3 is respectively provided with two cavities 5 extending from the bottom surface of the annular concave cavity 4 to the other end of the rubber body 3. The two cavities 5 are symmetrically arranged about the center line of the rubber body 3, and each cavity has a convex ridge 6 on the inner wall on the side close to the inner sleeve 1.

[0019] In the present invention, each cavity is in an arc shape along the circumference of the rubber body 3. Thus, on the basis of having sufficient space, it can better adapt to the cylindrical structure of the entire leaf spring ear bushing.

[0020] In the present invention, the total depth of the annular cavity 4 and the single cavity is at least greater than half the length of the rubber body 3. Thus, the two cavities 5 have sufficient depth to better attenuate the vertical vibration of the leaf spring.

[0021] In the present invention, the other end of the rubber body 3 protrudes outward relative to the outer shell 2 and forms a protrusion 7. As a result, the other end of the rubber body 3 is thickened to compensate for the weakening of the rigidity caused by the annular cavity 4 and two cavities 5 provided at one end of the rubber body 3, thereby maintaining sufficient rigidity of the rubber body 3.

[0022] In the present invention, the inner side of the protrusion 7 is recessed inward near the inner sleeve 1 and forms an annular groove 8. Thus, the annular groove 8 cooperates with the annular cavity 4 and the two cavities 5 end to end, so that the rubber body 3 can produce reasonable deformation in the vertical direction.

[0023] The present invention will be further described below with reference to the accompanying drawings:

[0024] During assembly, the two cavities 5 are arranged up and down, the leaf spring ear bushing is inserted into the ear of the leaf spring, and then the leaf spring pin is inserted into and fixed in the leaf spring ear bushing.

[0025] When in use, since the two cavities 5 can extend the depth of the annular cavity 4 on the upper and lower sides, the rubber body 3 can produce reasonable deformation in the vertical direction (contract inward), thereby effectively attenuating the vertical vibration of the leaf spring, and the depth of the annular cavity 4 does not need to be designed too deep, so that the lateral stiffness of the leaf spring can be well maintained, achieving a reasonable balance.

[0026] In addition, since each cavity has a ridge 6 on the inner wall on the side close to the inner sleeve 1, when the rubber body 3 deforms vertically, that is, when it shrinks inward and abuts against the ridge 6, it will no longer shrink inward under the restrictive action of the ridge 6, thereby limiting the amount of inward deformation of the rubber body 3, which is beneficial to maintaining the service life of the leaf spring ear bushing.

[0027] Although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0028] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent modifications made according to the scope of the claims of the present application are within the scope of protection of the claims of the present application.

Claims

1. A leaf spring ear bushing comprising an inner sleeve, an outer sleeve, and a rubber body, wherein the rubber body is integrally formed between the inner sleeve and the outer sleeve by vulcanization, and one end of the rubber body is recessed inward relative to the inner sleeve and the outer sleeve to form an annular cavity, characterized in that: The rubber body is provided with two cavities extending from the bottom surface of the annular cavity to the other end of the rubber body. The two cavities are symmetrically arranged about the center line of the rubber body. Each cavity has a convex ridge on the inner wall on the side close to the inner sleeve.

2. The leaf spring ear bushing according to claim 1, characterized in that: Each cavity is in an arc shape along the circumference of the rubber body.

3. The leaf spring ear bushing according to claim 1, characterized in that: The total depth of the annular cavity and the single cavity is at least greater than half the length of the rubber body.

4. The leaf spring ear bushing according to claim 1, characterized in that: The other end of the rubber body protrudes outward relative to the outer sleeve and forms a protruding portion.

5. The leaf spring ear bushing according to claim 4, characterized in that: The inner side of the protrusion is recessed inwards at a position close to the inner sleeve and forms an annular groove.

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