CN203146582U - Composite bushing connection device - Google Patents

Abstract

The utility model relates to a composite bushing connection device which comprises a pin shaft, a shaft sleeve configured with the outer diameter of the pin shaft, and a fixing bracket used for fixing the pin shaft; the shaft sleeve comprises an inner metal sleeve, an outer metal sleeve and an elastic layer arranged between the inner metal sleeve and the outer metal sleeve; the shaft sleeve also comprises a metal sliding layer arranged at the inner side of the inner metal sleeve; the metal sliding layer is rotatablely sheathed on the pin shaft; and a gap is reserved between the end surface of the shaft sleeve and the inner wall of the fixing bracket. The composite bushing connection device separates the functions of radial bearing and axial rotating, so that the movement of the axis of the pin shaft is realized by virtue of the relative rotation between the metal sliding layer and the pin shaft; and therefore, on the one hand, the shaft sleeve can freely rotate around the pin shaft along with an external moving part, and the friction between the inner metal sleeve and the pin shaft can be avoided, and on the other hand, the elastic layer does not have the twisting function and only bears the radial load, thus having the buffer function.

Description

A composite bush connection device

technical field

The utility model relates to a motor vehicle suspension system, in particular to a composite bush connection device for the motor vehicle suspension system.

Background technique

At present, the composite bushing used in the suspension system of a motor vehicle includes an inner metal sleeve 4, an outer metal sleeve 2, and an elastic layer 3 arranged between the inner metal sleeve and the outer metal sleeve. When connecting and using, the end surface of the inner metal sleeve 4 and the fixed bracket 5 are fastened by friction through the clamping torque, and the outer metal sleeve 2 is fixed (can be fixed by interference fit or bonding) to the external moving part 1 (such as suspension control arms, linkages, etc.), as shown in Figure 1. During operation, the rotation of the external moving part 1 relative to the axis of the pin shaft 6 is realized through the torsion of the elastic layer 3, and at the same time, the elastic layer bears the radial load and plays a buffering role.

Since the existing inner metal sleeve cannot withstand large friction, the inner metal sleeve is fixed on the fixed bracket to prevent the wear of the inner metal sleeve, thereby realizing the rotation of the external moving part relative to the axis of the pin shaft through the torsion of the elastic layer. This kind of shaft-sleeve connection structure has a limited rotation angle range, and it is difficult to realize large-angle movement of moving parts. Therefore, in order to increase the rotation angle of the moving parts, it is usually necessary to increase the thickness of the elastic layer, but the radial bearing capacity of the elastic layer will decrease with the increase of its thickness, and the increase of the thickness has higher requirements for spatial arrangement.

Therefore, the current composite bush connection device cannot simultaneously realize the functions of large radial load and large axial torsion, which restricts the improvement of related performance of the suspension system.

China's utility model patent (authorized announcement number CN2876434Y, announcement date 2007.03.07) also discloses a split elastic bushing, which is composed of an elastic sleeve, a plastic spacer and a plastic bushing. The left and right ends of the outer diameter of the plastic bushing Each is equipped with a plastic spacer, the outer diameter of the plastic bushing and the inner diameter of the plastic spacer are set as a rotational fit, the outer diameter of the plastic spacer is equipped with an elastic sleeve, and the outer diameter of the plastic spacer and the inner diameter of the elastic sleeve are set as an interference fit , the outer diameter of the connecting shaft of the automobile suspension swing arm and the inner diameter of the plastic bushing are set to an interference fit, when the suspension swing arm swings up and down, only the plastic spacer and the plastic bushing rotate relative to each other. Although the swing range of the suspension arm is not limited, due to the non-metallic friction contact, on the one hand, the non-metallic wear resistance is poor, which is suitable for lighter motor vehicles. On the other hand, a seal is required to prevent debris from entering structure, and it is also necessary to add a plastic bushing with an interference fit on the shaft, through the outer surface of the plastic bushing to form a rotational fit with the inner side of other components, the structure is complex and lacks durability and reliability.

Contents of the invention

The purpose of the present utility model is to provide a composite bush connection device with separate radial bearing and axial rotation functions for the above defects.

The technical scheme adopted by the utility model to solve the technical problem is: provide a composite bush connection device, a pin shaft, a shaft sleeve configured with the outer diameter of the pin shaft, and a fixed bracket for fixing the pin shaft, the shaft sleeve includes an inner metal sleeve, an outer metal sleeve, and an elastic layer disposed between the inner metal sleeve and the outer metal sleeve, the shaft sleeve also includes a metal sliding layer disposed inside the inner metal sleeve, and the metal sliding layer is rotatably sleeved on the pin shaft; There is a gap between the end surface of the shaft sleeve and the inner wall of the fixing bracket.

The metal sliding layer is fixedly connected to the inside of the inner metal sleeve.

The metal sliding layer is integrally formed with the inner metal sleeve.

The outer diameter of the metal sliding layer and the inner diameter of the inner metal sleeve are set as an interference fit.

The metal sliding layer is fixedly connected with the inner metal sleeve by bonding.

Compared with the prior art, the utility model has the beneficial effects that: a metal sliding layer is added on the inner side of the inner metal sleeve of the shaft sleeve, and the end face of the shaft sleeve does not interfere with the fixed bracket and is fixed, and the shaft sleeve can move freely relative to the fixed bracket. This compound bush connection device realizes the separation of the radial bearing and axial rotation functions, so the movement around the pin shaft axis is realized by the relative rotation between the metal sliding layer and the pin shaft, on the one hand, it ensures that the shaft sleeve can follow the external moving parts Arbitrary rotation around the pin shaft also avoids the friction between the inner metal sleeve and the pin shaft. On the other hand, the elastic layer no longer bears the torsion function, but only bears the radial load and acts as a buffer. The thickness of the elastic layer can be appropriately selected to achieve large Excellent radial bearing capacity, simple structure and easy installation, especially suitable for heavy motor vehicles.

Description of drawings

The utility model will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is a sectional view of an existing composite bush connection device;

Fig. 2 is a cross-sectional view of the composite bush connection device of the present invention;

Fig. 3 is a cross-sectional view of another composite bush connection device of the present invention.

Detailed ways

As shown in Figure 2, a composite bush connection device includes a pin shaft 12, a shaft sleeve configured with the outer diameter of the pin shaft 12, and a fixing bracket 11 for fixing the pin shaft 12. The shaft sleeve includes an inner metal sleeve 14, an outer metal sleeve The sleeve 7 constitutes and connects the elastic layer 9 between the inner metal sleeve and the outer metal sleeve and the metal sliding layer 13 fixedly connected to the inside of the inner metal sleeve 14 . In this embodiment, the inner diameter of the metal sliding layer 13 and the outer diameter of the pin shaft 12 are set to rotate and fit, so that the metal sliding layer is rotatably sleeved on the pin shaft; gap, so that the shaft sleeve and the fixed bracket 11 can move relative to each other, and there is no need to use tension force to relatively fix through end friction, which reduces the wear between the shaft sleeve end surface 15 and the fixed bracket 11; the metal sliding layer 13 and the inner metal The sleeves 14 are fixedly connected by means of interference fit or bonding; the outer metal sleeve 7 is fixed (can be fixed by means of interference fit or bonding) to the external moving parts 10 (such as suspension control arms, connecting rods, etc.) etc.), the same as the traditional connection method.

A metal sliding layer 13 is added inside the inner metal sleeve 14 of the shaft sleeve, and the end face 15 of the shaft sleeve does not conflict with the fixed bracket 11, and the shaft sleeve can move freely relative to the fixed bracket. The moving part 10 can rotate arbitrarily around the pin shaft, realizing the separation of the functions of radial bearing and axial rotation. The elastic layer 9 no longer bears the torsion function during the entire working process, but only bears the radial load and acts as a buffer, and finally achieves the purpose of improving the performance of the suspension and prolonging the working life of the bushing, and the thickness of the elastic layer can be selected appropriately , to achieve a large radial load capacity. A metal sliding layer is added to the inner side of the inner metal sleeve, which avoids the friction between the inner metal sleeve and the pin shaft, and overcomes the defect that the existing inner metal sleeve cannot bear large friction. The composite bush connecting device is especially suitable for heavy-duty vehicles.

As shown in Figure 3, the inner metal sleeve and the metal sliding layer of the composite bush connection device can be integrally formed as a whole 8, and the whole 8 can not only play a supporting role, but also play a sliding function, which simplifies the composite bush connection device. structure and connections.

Of course, according to the load-bearing requirements of the specific parts of the composite bush connection device, such as lighter vehicles, the installed sliding layer can also use a non-metallic sliding layer.

Embodiments of the present utility model have been described above in conjunction with the accompanying drawings, but the present utility model is not limited to the above-mentioned specific implementation, and the above-mentioned specific implementation is only illustrative, rather than restrictive. Under the enlightenment of the utility model, personnel can also make many forms without departing from the purpose of the utility model and the scope protected by the claims, and these all belong to the protection scope of the utility model.

Claims (5)

1. A composite bushing connecting device, comprising a bearing pin, a shaft sleeve configured with the outer diameter of the bearing pin, a fixed support for fixing the pin shaft, the sleeve includes an inner metal sleeve, an outer metal sleeve, an inner metal sleeve and an outer metal sleeve The elastic layer between the outer metal sleeves is characterized in that the shaft sleeve also includes a metal sliding layer arranged inside the inner metal sleeve, and the metal sliding layer is rotatably sleeved on the pin shaft; the end surface of the shaft sleeve and the fixed There is a gap between the inner walls of the bracket. 2. The composite bush connection device according to claim 1, wherein the metal sliding layer is fixedly connected to the inside of the inner metal sleeve. 3. The composite bush connection device according to claim 1, characterized in that, the metal sliding layer and the inner metal sleeve are integrally formed. 4. The composite bush connection device according to claim 2, characterized in that, the outer diameter of the metal sliding layer and the inner diameter of the inner metal sleeve are set as an interference fit. 5. The composite bush connection device according to claim 2, characterized in that, the metal sliding layer is fixedly connected to the inner metal sleeve by bonding. the

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