CN211423152U - Axial load-bearing structure of a bus door system - Google Patents

Abstract

The utility model discloses an axial bearing structure of a bus door system, which comprises a fixed plate, an outer spherical shaft and a bearing. The fixed plate is provided with an inner spherical surface, and one end of the outer spherical shaft is connected with the inner spherical surface in the fixed plate. The spherical surface structure is formed by cooperating with installation, and the centering is realized by the rotation of the spherical surface structure; the other end extends into the bearing shaft, and a bearing is arranged between the outer spherical surface shaft and the bearing shaft. The utility model adopts a spherical structure to separate the self-aligning and rotating functions. In the case where the bottom surface of the fixing plate is not perpendicular to the axis line of the bearing shaft, the bearing shaft and the outer spherical shaft can maintain a coaxial line, and the bearing shaft can always surround the bearing shaft. The axis rotates; the utility model selects rolling bearings with better wear resistance and bearing capacity, when the axial force of the bearing shaft is large, the frictional resistance during rotation can be reduced, and the problem of axial movement of the bearing shaft caused by bearing wear can be solved. , thereby improving the service life of the bearing structure.

Description

Axial load-bearing structure of a bus door system

technical field

The utility model relates to a bus passenger door device structure, in particular to an axial bearing structure of a bus door system.

Background technique

The door leaf of the existing inner swing door is connected with the column, and its overall weight is completely carried by the column. In order to facilitate the drainage of rainwater at the door position, the floor surface of the passenger car door position is generally at a certain angle to the horizontal; due to the manufacturing and installation errors of the body and the column, even if the floor surface is completely horizontal, it cannot be guaranteed that the upper and lower installation points of the column are in the same vertical position. On a straight line, that is, the axis of the column cannot be perpendicular to the mounting surface of the mounting seat. In order to reduce the rotation resistance of similar shaft bearing rotating devices, bearings are generally provided, and the friction force is reduced by the relative rotation of the inner and outer rings. At this time, since the outer ring of the bearing is coaxial with the column, and the inner ring of the bearing is coaxial with the rotating shaft of the mounting seat, the inner and outer rings of the bearing cannot be collinear.

In order to make this type of bearing shaft still rotate normally around its own axis and reduce the daily maintenance work, self-lubricating radial spherical plain bearings are generally used. However, the spherical plain bearing is a sliding bearing, and its internal anti-friction material has a small hardness. When the axial force is large, the bearing life will be greatly shortened. The inner and outer rings will be seriously worn after long-term use, which will cause the lower layer of the bearing shaft and the frictional resistance to increase. For the column structure of the inner swing door, the fault is often manifested in the sinking of the column and the door leaf, and the resistance and noise of the door opening and closing increase. Therefore, the bearing needs to be lubricated and even replaced frequently, and the maintenance cost is high.

Utility model content

Purpose of the utility model: The purpose of the utility model is to provide an axial bearing structure of a bus door system, which separates the self-aligning and rotating functions. The shaft can remain coaxial, and the carrier shaft can always rotate about its axis.

Technical scheme: The utility model includes a fixed plate, an outer spherical shaft and a bearing, the fixed plate is provided with an inner spherical surface, and one end of the outer spherical shaft is installed in cooperation with the inner spherical surface in the fixed plate to form a spherical structure, through the spherical surface The rotation of the structure realizes self-alignment; the other end extends into the bearing shaft, and a bearing is arranged between the outer spherical shaft and the bearing shaft.

The bearing is a rolling bearing, its wear resistance and bearing capacity are better than that of a spherical plain bearing, and the frictional resistance when the bearing shaft rotates is reduced, thus greatly improving the service life of the bearing structure, and the rolling bearing can choose a deep groove with its own sealing ring Ball bearings can reduce the maintenance workload in the later stage; if other rolling bearings without dust-proof structures are used, dust-proof structures such as dust-proof covers or plugs should be added to the lower part of the bearing shaft.

One end of the outer spherical shaft is a spherical structure; the other end is a cylindrical structure, and a stepped surface is arranged between the spherical structure and the cylindrical structure.

The spherical structure is installed in cooperation with the inner spherical surface in the fixing plate; the cylindrical structure extends into the inside of the bearing shaft, and the rotation resistance of the bearing shaft is reduced by the relative rotation of the inner and outer rings of the bearing.

The bearing outer ring is fixed on the inner side of the bearing shaft, and the bearing inner ring is fixed on the stepped surface of the outer spherical shaft.

The axis line of the outer spherical shaft coincides with the axis line of the bearing shaft, and the rotation resistance of the bearing shaft is reduced by the relative rotation of the inner and outer rings of the bearing.

The top of the inner spherical surface of the fixed plate is provided with a pressing plate, which can limit the movement of the outer spherical surface axis, and only allow the outer spherical surface axis to rotate along the spherical contact surface within a certain range.

The outer spherical shaft passes through the fixing plate and the pressing plate, and a sealing ring is arranged between the outer spherical shaft and the pressing plate. On the one hand, the particles can be prevented from entering the spherical structure, and on the other side, the sealing ring can be compressed to eliminate manufacturing errors and avoid the upper and lower sides. sway.

Working principle: There is an inner spherical surface in the fixed plate, and the spherical structure of the outer spherical shaft is installed with the inner spherical surface to form a spherical structure, and then the alignment is realized through the rotation of the spherical structure; the inner ring of the bearing is fixed on the outer spherical shaft, and the outer The ring is fixed inside the bearing shaft to solve the problem that the bottom surface of the fixed plate is not perpendicular to the axis of the bearing shaft. The relative movement of the inner and outer rings of the rolling bearing reduces the resistance of the bearing shaft when it rotates.

Beneficial effect: The utility model has the following advantages:

(1) The spherical end of the outer spherical shaft and the inner spherical surface on the fixed plate form a spherical structure, and the alignment is achieved by the rotation of the spherical contact surface during installation to solve the problem that the bottom surface of the fixed plate is not perpendicular to the axis of the bearing shaft ;

(2) Rolling bearings are used for the rotating parts. The inner ring of the bearing is installed on the stepped surface of the outer spherical shaft. The outer ring of the bearing is matched with the inner hole of the bearing shaft. Relying on the relative rotation of the inner and outer rings of the bearing, the rotation resistance of the bearing shaft is reduced. There is no relative rotation between the outer spherical axis and the inner spherical surface;

(3) A sealing ring is arranged between the pressing plate and the outer spherical shaft, which can prevent particles from entering the spherical structure on the one hand, and can also compress the sealing ring on the other side to eliminate manufacturing errors and prevent it from moving up and down;

(4) The utility model separates the self-aligning and rotating functions, and selects rolling bearings with better wear resistance and bearing capacity. When the axial force of the bearing shaft is large, it can not only reduce the frictional resistance during rotation, but also solve the problem of the bearing shaft. Axial play caused by bearing wear, thereby increasing the service life of the load-bearing structure;

(5) The utility model is simple in structure, has few parts and is easy to process.

Description of drawings

Fig. 1 is the structural representation of the present utility model;

Fig. 2 is the three-dimensional structure schematic diagram of the present utility model;

Fig. 3 is the spherical structure schematic diagram of the present utility model;

FIG. 4 is a schematic view of the installation when the mounting surface of the fixing plate of the present invention is not perpendicular to the center line of the bearing shaft.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings.

As shown in FIGS. 1 to 4 , the utility model includes an outer spherical shaft 1 , a sealing ring 2 , a pressing plate 3 , a fixing plate 4 , a bearing 5 , a bearing shaft 6 and a screw 7 . As shown in FIG. 1, it is a form of the spherical structure of the present invention. When this structure is adopted, a hole is provided in the fixing plate 4, an inner spherical surface 402 is arranged in the hole, and the upper part of the outer spherical surface shaft 1 is a cylindrical long rod , the bottom is an outer spherical surface 101, and a stepped surface 102 is provided between the outer spherical surface 101 and the cylindrical long rod. The outer spherical surface 101 of the outer spherical shaft 1 is in contact with the inner spherical surface 402 of the fixed plate 4 to form a spherical structure. During installation, the rotation of the spherical contact surface is used to achieve alignment, so as to solve the problem between the bottom surface 401 of the fixed plate and the axis line of the bearing shaft 6 For the problem of non-perpendicularity, the outer spherical surface 101 and the inner spherical surface 402 can rotate relative to each other, but no relative rotation occurs when the bearing shaft 6 rotates.

As shown in Figures 1 and 2, the top of the fixing plate 4 is provided with a pressing plate 3, and the pressing plate 3 is fixed on the fixing plate 4 by screws 7, so that the outer spherical shaft 1 can only rotate angularly at the spherical contact surface. The outer spherical shaft 1 passes through the fixing plate 4 and the pressing plate 3 and extends into the bearing shaft 6 . A sealing ring 2 is arranged between the pressing plate 3 and the outer spherical shaft 1. The present invention adopts an O-shaped sealing ring. As shown in FIG. On the one hand, particles can be prevented from entering the spherical structure, and on the other hand, the sealing ring 2 can be compressed to eliminate manufacturing errors and prevent it from moving up and down.

As shown in FIG. 1 , a bearing 5 is provided between the outer spherical shaft 1 and the bearing shaft 6 , and the outer ring of the bearing 5 is in contact with the inner surface of the bearing shaft 6 . The inner ring of the bearing 5 is fixed on the stepped surface 102 of the outer spherical shaft 1. Depending on the relative rotation of the inner and outer rings of the bearing 5, the bearing shaft 6 rotates around its own axis under the action of an external driving force. The axis line of bearing 5 coincides with the axis line of outer spherical shaft 1 and the axis line of bearing shaft 6. Bearing 5 adopts rolling bearing, which can be deep groove ball bearing with low cost and self-contained dust cover, or can be used. If other types of rolling bearings are used, if other rolling bearings without dust-proof structure are used, dust-proof structures such as dust-proof covers or plugs should be added to the lower part of the bearing shaft 6 to prevent dust and other particulate impurities from entering the inside of the bearing 5, and regular lubrication should be carried out.

Due to the good wear resistance and bearing capacity of rolling bearings, when the bearing shaft 6 is subjected to a large axial force, the use of rolling bearings can not only reduce the frictional resistance of the bearing shaft 6 when it rotates, but also solve the problem of bearing wear caused by the bearing shaft 6. the problem of axial movement, thereby improving the service life of the load-bearing structure. When the bearing shaft 6 is not aligned with the fixed shaft of the mounting surface, a spherical plain bearing is generally used to solve the problem that the inner and outer rings of the bearing cannot be collinear, that is, the axis of the bearing shaft 6 is not perpendicular to the mounting surface. In the present invention, the centering and rotation functions of the bearing device are separated, and the outer spherical surface 101 of the outer spherical shaft 1 and the inner spherical surface 402 of the fixing plate 4 are used to form a spherical structure. Alignment is realized to solve the problem that the bottom surface 401 of the fixed plate is not perpendicular to the axis line of the bearing shaft 6. The inner and outer rings of the bearing 5 are always collinear and coaxial with the bearing shaft 6, as shown in Figure 4.

Claims (8)

1. An axial bearing structure of a bus door system is characterized by comprising a fixing plate, an outer spherical shaft and a bearing, wherein an inner spherical surface is arranged in the fixing plate, one end of the outer spherical shaft is matched and mounted with the inner spherical surface in the fixing plate to form a spherical structure, and the center adjustment is realized through the rotation of the spherical structure; the other end extends into the bearing shaft, and a bearing is arranged between the outer spherical surface shaft and the bearing shaft.

2. The axial load bearing structure of a bus door system as recited in claim 1, wherein the bearing is a rolling bearing.

3. The axial load bearing structure of a bus door system as recited in claim 1, wherein one end of the spherical outer surface axis is a spherical structure; the other end is a cylindrical structure, and a step surface is arranged between the spherical structure and the cylindrical structure.

4. The axial bearing structure of a bus door system as claimed in claim 3, wherein the spherical structure is fitted with the inner spherical surface of the fixing plate; the cylindrical structure extends into the bearing shaft.

5. The axial load bearing structure of a bus door system as claimed in claim 1 or 2, wherein the outer race of the bearing is fixed to the inner side of the load bearing shaft and the inner race of the bearing is fixed to the step surface of the outer spherical shaft.

6. A bus door system axial load bearing arrangement as claimed in claim 1 or 3, wherein the axis of the outer spherical surface shaft coincides with the axis of the load bearing shaft.

7. The axial load bearing structure of a bus door system as claimed in claim 1, wherein the top of the inner spherical surface of the fixing plate is provided with a pressing plate.

8. The axial bearing structure of a bus door system as claimed in claim 6, wherein the outer spherical shaft passes through the fixing plate and the pressing plate, and a sealing ring is arranged between the outer spherical shaft and the pressing plate.

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