CN107128325A - Rubber Node - Google Patents

Abstract

The rubber node includes a shaft core, a sleeve and a rubber body. The sleeve is cylindrical and is fitted on the shaft core. The core is vulcanized as a whole, and there is a gap between the end walls on both sides of the sleeve; it further includes an anti-loosening bushing and a limiting bushing arranged at both ends of the rubber body, and the side of the anti-loosening bushing facing the rubber body is a tapered surface , press into the rubber body along the tapered surface, it is interference press-fit between the rubber body and the end walls on both sides of the sleeve, and there is a gap between the anti-loosening shaft sleeve and the shaft core; In the gap between the off-shaft sleeve and the shaft core, it is an interference press fit between the rubber body and the end walls on both sides of the sleeve. The invention can greatly increase the axial stiffness and bending stiffness of the rubber node without changing the radial stiffness of the rubber node.

Description

Rubber Node

technical field

The invention relates to a rail traffic vibration damping component, in particular, a rubber node for rail traffic vibration damping.

Background technique

Rubber nodes are widely used in rail transit vibration damping products, especially bogie vibration damping products, which are key components to ensure the safe operation of vehicles. According to the application conditions of brake products, the rubber joints are required to have a good damping effect, and at the same time have certain axial, radial and bending rigidity requirements to ensure that when the vehicle passes a curve, the deflection of the brake caliper unit will cause the same Wheelset movement does not interfere.

At present, there are two main structural types of rubber joints.

The Chinese patent application with the publication number CN201296256Y discloses a rubber joint for rail transit bogies, which includes an outer jacket, a shaft core and a rubber layer, and retaining rings (sleeves) are arranged at both ends of the rubber layer. The structure of this product is shown in Figure 1. This node adopts the shaft core 4 and the rubber body 3 to be vulcanized into one, and is press-fitted in the sleeve (or product frame) 1, and the anti-loosening shaft sleeve 5 prevents axial shedding. This type of node product generally has a certain radial stiffness, can withstand a certain impact force in the radial direction, and has a good vibration reduction effect. The axial stiffness and bending stiffness of this structure are small, which easily causes the movement interference between the brake caliper unit and the wheel set.

Figure 2 is a schematic diagram of another rubber node structure applied to the bogie. This node is vulcanized by the shaft core 4, the rubber body 3, and the jacket 2, and then the overall structure is press-fitted on the sleeve (or product frame) 1 In general, this structure has a large radial stiffness, but also has a relatively large axial stiffness and bending stiffness. It is precisely because of its greater bending stiffness that it prevents the movement of the brake caliper unit from interfering with the wheel set, but reduces the shock absorption effect.

Contents of the invention

The purpose of the present invention is to provide a new type of rubber joint that can greatly increase the axial stiffness and bending stiffness of the rubber joint without changing the radial stiffness of the rubber joint.

The content of the present invention is: a rubber node, including a shaft core, a sleeve and a rubber body. The rubber body and the shaft core are vulcanized as a whole, and there is a gap between the end walls on both sides of the sleeve; it further includes anti-loosening bushings and limit bushings arranged at both ends of the rubber body, and the anti-loosening bushings face the rubber body One side is a tapered surface, and the rubber body is pressed into the rubber body along the tapered surface. It is an interference press fit between the rubber body and the end walls on both sides of the sleeve. On the surface; there is a gap between the anti-off shaft sleeve and the shaft core; the limit shaft sleeve is arranged in the gap between the anti-off shaft sleeve and the shaft core, and it is between the rubber body and the end walls on both sides of the sleeve. Press fit with interference.

Preferably, there is a gap between the limiting sleeve and the shaft core.

Preferably, the matching side of the limiting shaft sleeve and the anti-loosening shaft sleeve is a tapered surface, and the two are in close contact with each other.

Preferably, the limiting shaft sleeve is made of non-metal or metal material, and the anti-loosening shaft sleeve is made of metal material.

Preferably, the limiting shaft sleeve and the anti-loosening shaft sleeve can be integrated or have a detachable structure.

The beneficial effects of the present invention are:

The invention provides a new type of rubber node structure applied to rail vehicles. Through the combination of the anti-loosening bushing and the limiter bushing, the rubber node has radial stiffness, and also has axial and bending stiffness, and the limit There is a gap between the position shaft sleeve and the shaft core. This structure can limit excessive bending, and at the same time has the function of axial limit, which allows the product to bend within a certain angle, and the bending angle can be controlled to prevent its axial jump. move. When the vehicle passes through a curve, the deflection of the clamp unit is prevented from interfering with the movement of the wheel set.

The present invention can greatly increase the axial stiffness and bending stiffness of the rubber node without changing the radial stiffness of the rubber node, so that when the bending stiffness of the rubber node cannot bear the impact, the limit sleeve can limit the bending of the rubber node, To buffer the impact of rail vehicles, enhance the product's shock absorption performance.

Description of drawings

Fig. 1 is a schematic diagram of a rubber node structure in the prior art.

Fig. 2 is a schematic diagram of another rubber node structure in the prior art.

Fig. 3 is a schematic diagram of the rubber node structure of the present invention.

Among them: 1-sleeve, 101-side peripheral wall, 102-end wall, 2-outer jacket, 3-rubber body, 4-axis core, 5-anti-loosening sleeve, 6-limiting sleeve

detailed description

The specific implementation manners of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the embodiments described in the specific implementation are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The invention provides a rubber node applied to a rail vehicle damping system. Compared with traditional rubber joints, this product has better radial stiffness, axial stiffness and bending degree.

The same as the traditional rubber node structure, the rubber node provided by this application includes a shaft core 4, a sleeve 1 and a rubber body 3. The sleeve 1 is cylindrical and fits on the shaft core 4, including a side wall 101 and a side wall 101. Both ends extend the end wall 102 in the direction of the shaft core 4. After the machining of the shaft core 4 is completed, the adhesive is applied and put into the mold, and the rubber compound is injected into the mold, and the shaft core 4 and the rubber body 3 are vulcanized as one. , and then press-fit it in the upper sleeve 1. There is a gap between the rubber body 3 and the end walls on both sides of the sleeve 1 . Referring specifically to FIG. 3 , it is explained here that, taking the direction shown in FIG. 3 as a standard, the vertical direction is referred to as the “radial direction” described below, and the horizontal direction is referred to as the “axial direction” described below.

Different from the traditional rubber node structure, the rubber node structure provided in this embodiment further includes anti-loosening bushings 5 and limiting bushings 6 arranged at both ends of the rubber body 3 .

The side of the anti-off shaft sleeve 5 facing the rubber body 3 is a tapered surface. Since the rubber body and the side wall of the sleeve 1 are in a non-fixed connection structure, the anti-off shaft sleeve 5 can be pressed into the rubber body 3 along the tapered surface. , to compress the rubber body 3 toward the axis 4 . There is an interference press-fit between the anti-off shaft sleeve 5 and the rubber body 3 and the end walls 102 on both sides of the sleeve 1 . After the press-fitting, there is a gap between the anti-off shaft sleeve 5 and the shaft core 4 .

The anti-loosening sleeve 5 can ensure the radial stiffness of the rubber body 3 and limit the axial deformation of the rubber body 3, but the gap between it and the shaft core 4 will also cause the rubber body 3 to fall off easily in the axial direction.

In order to solve the above problems, a limit shaft sleeve 6 is further provided in the gap between the anti-off shaft sleeve 5 and the shaft core 4, and the side of the limit shaft sleeve 6 and the anti-off shaft sleeve 5 is a tapered surface, that is, the limit Adopt the type that adopts taper surface fit between position shaft sleeve 6 and anti-off shaft sleeve 5, and limit shaft sleeve 6 is extruded on the tapered surface of anti-off shaft sleeve 5 by the elastic force of rubber. The limiting shaft sleeve 6 and the anti-off shaft sleeve 5 can be integrated or have a detachable structure. The integral structure is conducive to ensuring the stability of the product structure, while the split structure is more flexible, and it is more convenient to replace under the premise of component damage.

There is a gap between the limiting sleeve 6 and the shaft core 4, and this gap can increase the axial bending of the node.

The limiting bushing is made of non-metal (to meet the insulation requirements of some vehicles during use) or metal, and the anti-loosening bushing is made of metal.

The rubber node of the present invention can be installed in the train bogie system, has certain radial stiffness and good damping performance, and also has axial bending performance and axial stiffness. In the process of normal straight running or turning of the train, it can show better vibration damping and prevent the motion interference of the wheel set caused by the movement of the clamp.

Claims (5)

1. Rubber joints, including a shaft core, a sleeve and a rubber body. The sleeve is cylindrical and fitted on the shaft core, including side walls and end walls extending from both ends of the side walls toward the shaft core. It is vulcanized as a whole with the shaft core, and there is a gap between the end walls on both sides of the sleeve; it is characterized in that it further includes an anti-loosening bushing and a limit bushing arranged at both ends of the rubber body, and the anti-loosening bushing faces the rubber body One side is a tapered surface, and the rubber body is pressed into the rubber body along the tapered surface. It is an interference press fit between the rubber body and the end walls on both sides of the sleeve, and there is a gap between the anti-off shaft sleeve and the shaft core; the limit The bit shaft sleeve is arranged in the gap between the anti-loosening shaft sleeve and the shaft core, and is press-fitted with interference between the rubber body and the end walls on both sides of the sleeve. 2. The rubber node according to claim 1, characterized in that there is a gap between the limiting bushing and the shaft core. 3. The rubber joint according to claim 1, characterized in that: the matching side of the limiting bushing and the anti-loosening bushing is a tapered surface, and the two are in close contact with each other. 4. The rubber node as claimed in claim 1, characterized in that: the limit shaft sleeve is made of non-metal or metal material, and the anti-loosening sleeve is made of metal material. 5. The rubber node according to claim 1, characterized in that: the limiting bushing and the anti-loosening bushing can be integrated or have a detachable structure.