Middle framework pre-embedded type rubber composite bushing

Abstract

The utility model discloses a middle framework pre-embedded type rubber composite bushing which comprises an inner framework, a middle framework, an outer framework and a rubber body, the rubber body is integrally formed between the inner framework and the outer framework through vulcanization, and the middle framework is embedded in the rubber body. The upper end face, opposite to the upper end face of the inner framework and the upper end face of the outer framework, of the rubber body and the lower end face, opposite to the lower end face of the inner framework and the lower end face of the outer framework, of the rubber body are sunken inwards and form annular grooves with wide outsides and narrow insides respectively. On the basis that the strength of the rubber body can be increased and the rubber body is prevented from protruding outwards due to extrusion to cause abrasion, an enough distance is reserved between the inner framework and the outer framework to adapt to deflection of the stabilizer bar body, the inner framework is prevented from interfering with the outer framework along with deflection of the stabilizer bar body, and the service life of the stabilizer bar body is prolonged. Therefore, deformation and abrasion caused by mutual extrusion and friction between the inner framework and the outer framework are avoided, and the service life of the composite bushing is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a central skeleton pre-embedded rubber composite bushing. Background Art

[0002] In order to reduce the natural vibration frequency of the car and improve driving smoothness, the vertical stiffness of the modern car suspension is designed to be lower, which makes the car's roll angle stiffness value also lower. In this way, when the car is turning, a large body roll angle is generated, affecting driving stability. To overcome this shortcoming, a lateral stabilizer bar is often used in the suspension to increase the suspension's roll angle stiffness, or to adjust the ratio of the front and rear suspension roll angle stiffness to ensure that the car has good driving stability.

[0003] Currently, automotive stabilizer bars primarily consist of a rod and bushing. The rod primarily prevents motion interference with the suspension's guide rod system and stabilizes the suspension. The bushing, located at the junction of the stabilizer bar, wheel, and frame, provides vibration isolation and noise reduction. Typically, bushings utilize an inner and outer frame structure, with a rubber body integrally molded via vulcanization between the two. After assembly, this type of bushing can cause the rubber body in the middle to bulge outward due to compression, protruding beyond the inner and outer frames and becoming exposed. This accelerates rubber wear and directly impacts vibration and noise reduction effectiveness.

[0004] To this end, the Chinese utility model patent with publication number CN204821020U provides a rubber composite bushing for an automobile stabilizer bar. The overall part of this rubber composite bushing adopts a multi-skeleton and multi-layer rubber alternating structure, that is, an outer piece (exoskeleton), an intermediate piece (intermediate skeleton) and an inner piece (internal skeleton) are sequentially installed. Rubber layers are provided between the outer piece and the intermediate piece, between the intermediate piece and the inner piece, and on the inner surface of the inner piece, and are fixed together by vulcanization molding. The strength can be increased by providing the intermediate piece. Due to the restriction of the intermediate piece, the rubber bodies on the inner and outer sides will not bulge outward due to extrusion, thereby avoiding wear caused by exposure of the rubber body.

[0005] However, in actual use, since the middle plate is basically flush with the inner and outer plates, and the rod body will inevitably be deflected by torsion during operation, thereby driving the inner plate to deflect, the inner plate and the middle plate will interfere with each other, that is, mutual extrusion and friction will cause deformation and wear, thereby affecting the service life, vibration reduction and noise reduction effects of the composite bushing. Utility Model Content

[0006] The purpose of the utility model is to overcome the defects and shortcomings of the prior art and to provide a middle-skeleton embedded rubber composite bushing, which can increase the strength of the rubber body and prevent the rubber body from bulging outward due to extrusion and causing wear, so that there is a sufficient distance between the inner and outer skeletons to adapt to the deflection of the stabilizer bar body, thereby avoiding deformation and wear of the inner skeleton and the outer skeleton caused by mutual interference with the deflection of the stabilizer bar body, thereby improving the service life of the composite bushing.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] A middle skeleton pre-embedded rubber composite bushing includes an inner skeleton, a middle skeleton, an outer skeleton and a rubber body. The rubber body is integrally formed between the inner skeleton and the outer skeleton by vulcanization. It is characterized in that: the middle skeleton is embedded in the interior of the rubber body, and the upper end surface of the rubber body is concave relative to the upper end surfaces of the inner skeleton and the outer skeleton, and the lower end surface of the rubber body is concave relative to the lower end surfaces of the inner skeleton and the outer skeleton, and respectively forms annular grooves that are wide on the outside and narrow on the inside.

[0009] Furthermore, the inner frame includes two relatively combined semi-cylinders.

[0010] Furthermore, the rubber composite bushing is respectively provided with a first trapezoidal notch which is wide outside and narrow inside on two opposite sides. The first trapezoidal notch radially penetrates the outer skeleton, the middle skeleton and the rubber body and extends to one end of the two semi-cylinders; the second trapezoidal notch radially penetrates the outer skeleton and the middle skeleton and extends to the outside of the other end of the two semi-cylinders.

[0011] Furthermore, the rubber body is provided with notches on both sides of the first trapezoidal notch and the second trapezoidal notch.

[0012] Furthermore, the first trapezoidal notch and the second trapezoidal notch are symmetrically arranged with respect to the central axis of the rubber composite bushing.

[0013] Furthermore, the rubber composite bushing is provided with openings on the upper and lower end faces on the other two opposite sides, the outer end of the opening is communicated with the annular groove, the inner end of the opening extends inward to be flush with the end face of the middle frame, and the inner end of the opening is connected to a positioning hole on one side of the middle frame.

[0014] Furthermore, the two openings located on the same end face are symmetrically arranged with respect to the central axis of the rubber composite bushing.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The utility model embeds the middle skeleton inside the rubber body, that is, it does not leak out, and the upper and lower end faces of the rubber body are provided with annular grooves that are wide on the outside and narrow on the inside. On the basis of being able to increase the strength of the rubber body and prevent the rubber body from bulging outwards due to extrusion and thus causing wear, there is sufficient spacing between the inner skeleton and the outer skeleton to adapt to the deflection of the stabilizer bar body, avoiding the inner skeleton from interfering with the outer skeleton as the stabilizer bar body deflects, that is, avoiding deformation and wear caused by mutual extrusion and friction between the inner skeleton and the outer skeleton, thereby improving the service life of the composite bushing and ensuring the vibration reduction and noise reduction effects of the composite bushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model.

[0018] Figure 2 for Figure 1 AA structural cross-section view. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1 、 2 A middle skeleton pre-embedded rubber composite bushing includes an inner skeleton 1, a middle skeleton 2, an outer skeleton 3 and a rubber body 4. The rubber body 4 is integrally formed between the inner skeleton 1 and the outer skeleton 3 by vulcanization, and the middle skeleton 2 is embedded in the interior of the rubber body 4. The upper end surface of the rubber body 4 is concave relative to the upper end surfaces of the inner skeleton 1 and the outer skeleton 3, and the lower end surface of the rubber body 4 is concave relative to the lower end surfaces of the inner skeleton 1 and the outer skeleton 3, and forms an annular groove 5 that is wide on the outside and narrow on the inside.

[0021] In the present invention, the inner frame 1 includes two relatively combined half cylinders.

[0022] Therefore, by designing the inner skeleton 1 into two relatively fitted half-cylinders, when assembled with the stabilizer bar body, that is, when the rubber composite bushing is fitted onto one end of the stabilizer bar body, the two half-cylinders expand outwards and the rubber body 4 expands outwards, which facilitates assembly. After being fitted into place, the elastic contraction of the rubber body 4 generates a reset tendency, so that the two half-cylinders hug one end of the stabilizer bar body, forming a tight fit.

[0023] In the present invention, a first trapezoidal notch 6 and a second trapezoidal notch 7, which are wide on the outside and narrow on the inside, are respectively provided on two opposite sides of the rubber composite bushing. The first trapezoidal notch 6 radially penetrates the outer skeleton 3, the middle skeleton 2 and the rubber body 4 and extends to one end of the two semi-cylinders; the second trapezoidal notch 7 radially penetrates the outer skeleton 3 and the middle skeleton 2 and extends to the outside of the other end of the two semi-cylinders, so that the entire rubber composite bushing will not be broken.

[0024] In the present invention, the rubber body 4 is provided with notches 8 on both sides of the first trapezoidal notch 6 and the second trapezoidal notch 7 .

[0025] Therefore, a first trapezoidal notch 6 and a second trapezoidal notch 7, which are wide outside and narrow inside, are respectively provided on two opposite sides of the rubber composite bushing, and notches 8 are provided on both sides of the first trapezoidal notch 6 and the second trapezoidal notch 7, so that when the composite bushing is inserted into the corresponding assembly hole, there is sufficient compression and expansion (reset) space.

[0026] Specifically, when the rubber composite bushing is fitted into the corresponding assembly hole, the first trapezoidal notch 6, the second trapezoidal notch 7 and the notches 8 on both sides thereof are all contracted inwards to facilitate assembly. After being fitted into place, the elastic expansion of the rubber body 4 generates a reset tendency, causing the first trapezoidal notch 6, the second trapezoidal notch 7 and the notches 8 on both sides thereof to expand from the outside to the inside, thereby tightening the exoskeleton 3 in the assembly hole to form a tight fit.

[0027] In the present invention, the first trapezoidal notch 6 and the second trapezoidal notch 7 are symmetrically arranged with respect to the central axis of the rubber composite bushing, so that the force is evenly applied during the assembly process.

[0028] In the present invention, the rubber composite bushing is provided with an opening 9 on the upper and lower end faces on the other two opposite sides. The outer end of the opening 9 is communicated with the annular groove 5, and the inner end of the opening 9 extends inward to be flush with the end face of the middle frame 2. The inner end of the opening 9 is connected to a positioning hole 10 on one side of the middle frame 2.

[0029] Therefore, during the vulcanization molding process, each positioning rod on the mold extends into each opening 9 respectively, and the positioning head at the end of each positioning rod can be inserted into each positioning hole 10 to position and support the middle skeleton 2, thereby facilitating the vulcanization molding operation and realizing the integral molding of the rubber body 4 between the inner skeleton 1 and the outer skeleton 3, and the middle skeleton 2 is embedded in the interior of the rubber body 4.

[0030] In the present invention, the two openings 9 on the same end face are symmetrically arranged with respect to the central axis of the rubber composite bushing, so that the central skeleton 2 can be stably positioned and supported during the vulcanization molding process.

[0031] The present invention will be further described below with reference to the accompanying drawings:

[0032] During installation, the rubber composite bushing of the present invention is sleeved on one end of the stabilizer bar body through the inner frame 1 to form a tight fit; in addition, it is sleeved in the corresponding assembly hole through the outer frame 3 to form a tight fit.

[0033] During use, since the middle skeleton 2 is embedded in the interior of the rubber body 3, that is, it does not leak out, and the upper and lower end faces of the rubber body 4 have annular grooves 5 that are wide on the outside and narrow on the inside. Therefore, on the basis of being able to increase the strength of the rubber body 4 and avoid the rubber body 4 being squeezed and bulging outward and causing wear, there is enough space between the inner skeleton 1 and the outer skeleton 3 to adapt to the deflection of the stabilizer bar body. Even if the stabilizer bar body inevitably deflects during operation and drives the inner skeleton 1 to deflect, there will be no mutual interference between the inner skeleton 1 and the outer skeleton 3, that is, there will be no mutual squeezing or friction between the inner skeleton 1 and the outer skeleton 3, and no deformation or wear will occur. This improves the service life of the composite bushing and ensures the vibration reduction and noise reduction effects of the composite bushing.

[0034] 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.

[0035] 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 pre-buried rubber composite bushing with a central skeleton, comprising an inner skeleton, a central skeleton, an outer skeleton, and a rubber body, wherein the rubber body is integrally formed between the inner skeleton and the outer skeleton by vulcanization, and is characterized in that: The middle skeleton is embedded in the rubber body. The upper end surface of the rubber body is concave relative to the upper end surfaces of the inner and outer skeletons, and the lower end surface of the rubber body is concave relative to the lower end surfaces of the inner and outer skeletons, forming annular grooves that are wide outside and narrow inside.

2. The mid-frame pre-embedded rubber composite bushing according to claim 1, characterized in that: The inner frame comprises two relatively combined half cylinders.

3. The mid-frame pre-embedded rubber composite bushing according to claim 2, characterized in that: The rubber composite bushing is respectively provided with a first trapezoidal notch that is wide on the outside and narrow on the inside on two opposite sides. The first trapezoidal notch radially penetrates the outer skeleton, the middle skeleton and the rubber body and extends to one end of the two semi-cylinders; the second trapezoidal notch radially penetrates the outer skeleton and the middle skeleton and extends to the outside of the other end of the two semi-cylinders.

4. The mid-frame pre-embedded rubber composite bushing according to claim 3, characterized in that: The rubber body is provided with notches on both sides of the first trapezoidal notch and the second trapezoidal notch.

5. The mid-frame pre-embedded rubber composite bushing according to claim 3, characterized in that: The first trapezoidal notch and the second trapezoidal notch are symmetrically arranged about the central axis of the rubber composite bushing.

6. The mid-frame pre-embedded rubber composite bushing according to claim 1, characterized in that: The rubber composite bushing is provided with openings on the upper and lower end surfaces on the other two opposite sides. The outer end of the opening is connected to the annular groove, and the inner end of the opening extends inward to be flush with the end surface of the middle frame. The inner end of the opening is connected to a positioning hole on one side of the middle frame.

7. The mid-frame pre-embedded rubber composite bushing according to claim 6, characterized in that: The two openings located on the same end face are symmetrically arranged with respect to the central axis of the rubber composite bushing.

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