CN203362819U - Bearing device - Google Patents

Abstract

The utility model provides a bearing device, which comprises a joint bearing, a sleeve and two rolling bearings, wherein the sleeve is embedded in the inner ring of the joint bearing, and the two rolling bearings are respectively installed in the sleeve , one of the rolling bearings is installed at one end of the sleeve, the other rolling bearing is installed at the other end of the sleeve, rolling bearing covers are respectively provided at both ends of the joint bearing, and the sleeve The barrel and the rolling bearing are sealed within the spherical plain bearing by the rolling bearing cover. It has the advantages of convenient processing, simple structure, low cost, easy popularization and mass production.

Description

A bearing device

technical field

The utility model relates to the technical field of bearings, in particular to a bearing device capable of self-aligning.

Background technique

Bearings in the prior art are mainly used in heavy loads and impact loads, precision instruments, low-noise electrodes, automobiles, metallurgy, rolling mills, mining, petroleum, papermaking, cement and other industries and general machinery. The existing self-aligning bearings generally set a gap between the inner and outer rings, and the self-aligning of the bearing is realized by changing the gap. It can only swing but not roll. In the case of centering with special requirements, the existing Self-aligning bearings cannot be used.

Utility model content

The purpose of the invention of the utility model is to overcome the defects in the prior art and provide an automatic self-aligning bearing device capable of self-aligning, rolling and swinging.

The technical scheme of the utility model provides a bearing device, including a joint bearing, a sleeve and two rolling bearings, wherein the sleeve is embedded in the inner ring of the joint bearing, and the two rolling bearings are respectively installed in the sleeve In the cylinder, one of the rolling bearings is installed at one end of the sleeve, the other rolling bearing is installed at the other end of the sleeve, and the two ends of the joint bearing are respectively provided with rolling bearing covers, so The sleeve and the rolling bearing are sealed in the joint bearing through the rolling bearing cover.

Further, both ends of the sleeve are provided with inner hole grooves for installing the rolling bearings, and the two rolling bearings are respectively installed in the two inner hole grooves.

Further, one end of the sleeve is provided with a protrusion for positioning with the joint bearing.

Further, the rolling bearing cover includes a cover body part and an abutment part, the outer diameter of the cover body part is larger than the diameter of the inner ring of the joint bearing, and the cover body part is connected to the end part of the sleeve through screws. The abutting top is connected to the rolling bearing, and the two rolling bearings are respectively axially positioned in the two inner grooves through the two abutting tops.

Further, the sleeve and the joint bearing are axially fixed together, and the two rolling bearings are axially fixed together with the sleeve, and the sliding friction moment between the inner and outer rings of the joint bearing is greater than The rolling friction moment between the inner and outer rings of the rolling bearing.

Adopt above-mentioned technical scheme, have following beneficial effect:

A sleeve is embedded in the inner ring of the joint bearing, and then a rolling bearing is installed in the sleeve. The sleeve and the joint bearing are axially fixed, and the rolling bearing is axially fixed relative to the sleeve. The joint bearing can swing around the bearing seat, and the rolling bearing When the supported shaft rotates, the rolling bearing is rotated and adjusted, so as to realize the function of both swinging and rolling centering. Through the simple connection of the rolling bearing and the joint bearing, only simple processing is required to realize a support method that can not only transmit rolling but also can swing and align at a large angle, thereby broadening the application range of the bearing device.

Description of drawings

Fig. 1 is the structural representation of a kind of bearing device provided by the utility model;

Fig. 2 is a cross-sectional view of a joint bearing in a bearing device shown in Fig. 1;

Fig. 3 is a cross-sectional view of a sleeve in a bearing device shown in Fig. 1;

Fig. 4 is a cross-sectional view of a rolling bearing cover in a bearing device shown in Fig. 1;

Fig. 5 is a schematic diagram of a bearing device shown in Fig. 1 installed on a bearing seat.

Reference sign comparison table:

1-joint bearing; 11-inner ring; 12-outer ring;

2-sleeve; 21-raised part; 22-inner hole groove;

3-rolling bearing; 4-rolling bearing cover; 41-cover body;

42-top; 5-screw; 6-bearing seat;

7-axis.

Detailed ways

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

As shown in Figure 1-5, a bearing device provided by the utility model includes a joint bearing 1, a sleeve 2 and two rolling bearings 3, wherein the sleeve 2 is embedded in the inner ring 11 of the joint bearing 1, and the two The rolling bearings 3 are respectively installed in the sleeve 2, one of the rolling bearings 3 is installed at one end of the sleeve 2, the other rolling bearing 3 is installed at the other end of the sleeve 2, and the two ends of the joint bearing 1 are respectively provided with rolling bearings Cover 4 , sleeve 2 and rolling bearing 3 are sealed in spherical plain bearing 1 by means of rolling bearing cover 4 .

The joint bearing 1 above is mainly composed of an inner ring 11 with an outer spherical surface and an outer ring 12 with an inner spherical surface, and can bear relatively large loads. The above-mentioned rolling bearing 3 may also be a deep groove ball bearing.

The above sleeve 2 is embedded in the inner ring 11 of the joint bearing 1, the rolling bearing 3 is embedded in the sleeve 2, the two rolling bearings 3 are respectively embedded in the two ends of the sleeve 2, and the rolling bearing caps 4 at both ends of the joint bearing 1 are passed through the hexagon socket head cap screws 5 fixed to form a sealed structure.

As shown in FIG. 5 , the outer ring 12 of the joint bearing 1 is in contact with the bearing housing 6 , and the inner ring of the rolling bearing 3 is in contact with the shaft 7 for supporting the shaft 7 . The outer ring of the rolling bearing 3 is in contact with the inner surface of the sleeve 2 , and the outer surface of the sleeve 2 is in contact with the inner ring 11 of the joint bearing 1 . Therefore, the spherical plain bearing 1 in the bearing device can swing at a certain angle relative to the bearing seat 6, and the rolling bearing 3 can roll, so as to realize both swinging and rolling, and automatic centering. When the axis of the rolling bearing 3 deviates greatly from the center line of the bearing seat 6, the bearing device can realize self-aligning to ensure the coaxiality of the shaft 7 and the rolling bearing 3, and avoid damage to the shaft 7 and the rolling bearing 3.

The maximum self-aligning angle of the joint bearing 1 is adjusted to 15°, so that the bearing device can be applied to the occasion of large-angle self-alignment.

As shown in FIG. 3 , both ends of the sleeve 2 are provided with inner hole grooves 22 for installing the rolling bearings 3 , and the two rolling bearings 3 are respectively installed in the two inner hole grooves 22 .

When installing, first insert a rolling bearing 3 into the inner hole groove 22 on the left side of the sleeve 2, and then insert another rolling bearing 3 into the rolling bearing 3 on the right side of the sleeve 2 to form part of the axial positioning of the two rolling bearings 3. Part of the axial positioning is to determine the limit position of the two rolling bearings 3 when they move towards each other in the sleeve 2 . Then insert the sleeve 2 and the rolling bearing 3 into the inner ring 11 of the spherical plain bearing 1, and then fix the rolling bearing covers 4 at both ends of the spherical plain bearing 1 to the sleeve 2 by means of hexagon socket head cap screws 5 to form a sealing structure.

One end of the sleeve 2 is provided with a protrusion 21 for positioning with the joint bearing 1 . One end of the sleeve 2 is provided with a raised portion 21, and the other end is a smooth end. The diameter of the projection 21 is larger than the inner diameter of the inner ring 11 of the spherical plain bearing 1 . After the axial positioning of the two rolling bearings 3 in the sleeve 2, the smooth end of the sleeve 2 is passed through the inner ring 11 until the protrusion 21 abuts against the spherical plain bearing 1, so that the sleeve 2 Axial positioning is realized between the spherical plain bearing 1.

As shown in Figures 1 and 4, the rolling bearing cover 4 includes a cover body 41 and an abutment part 42, the outer diameter of the cover body 41 is larger than the diameter of the inner ring 11 of the joint bearing 1, and the cover body 41 connects the screw 5 and the sleeve The ends of 2 are connected, and the abutting top 42 is in contact with the rolling bearing 3 , and the two rolling bearings 3 are respectively axially positioned in the two inner hole grooves 22 through the two abutting tops 42 . The above-mentioned rolling bearing 3 is installed in the inner hole groove 22 , and its outer side is supported by the abutment 42 , so that the axial positioning of the two rolling bearings 3 is realized, and they are respectively positioned in the two inner hole grooves 22 .

The sleeve 2 and the joint bearing 1 are axially fixed together, and the two rolling bearings 3 are axially fixed with the sleeve 2. The sliding friction moment between the inner and outer rings of the joint bearing 1 is greater than that between the inner and outer rings of the rolling bearing 3 The rolling friction torque between them.

The inner and outer rings of the rolling bearing 3 correspond to the inner ring and the outer ring of the rolling bearing 3 respectively, the inner ring of the rolling bearing 3 is in contact with the shaft 7 , and the outer ring is in contact with the inner surface of the sleeve 2 . There is absolutely no relative movement between the inner ring of the joint bearing 1 and the sleeve 2 and the outer rings of the two rolling bearings 3 . That is, the sleeve 2 and the joint bearing 1 are axially fixed together, and the two rolling bearings 3 are axially fixed together with the sleeve 2 .

The sliding friction torque generated between the inner and outer rings of the joint bearing 1 is greater than the rolling friction torque generated between the inner and outer rings of the two rolling bearings 3, so when the supported shaft 7 has rotation and swing at the same time, the inner rings of the two rolling bearings 3 bear the rotation , The inner ring of the joint bearing 1 only bears the swing. Therefore, when the axis of the rolling bearing 3 deviates greatly from the center line of the bearing seat 6, the bearing device can realize automatic centering through the swing of the joint bearing 1 and the rotation of the rolling bearing 3, so as to ensure the coaxiality of the shaft 7 and the rolling bearing 3 To avoid damage to the shaft and bearings.

The bearing device provided by the utility model can realize large-angle centering, and does not require special processing. It only needs to use standard type rolling bearings (deep groove ball bearings), joint bearings and rolling bearing covers, combined with sleeves obtained by simple machining, The four components are fastened and connected by hexagon socket head cap screws to realize the automatic centering function, and it has the advantages of convenient processing, simple structure, low cost, easy popularization, and mass production.

What has been described above is only the principle and preferred embodiments of the present utility model. It should be pointed out that for those skilled in the art, several other modifications can be made on the basis of the principle of the utility model, which should also be regarded as the protection scope of the utility model.

Claims (5)

1. A bearing device, characterized in that it comprises a joint bearing, a sleeve and two rolling bearings, wherein the sleeve is embedded in the inner ring of the joint bearing, and the two rolling bearings are respectively mounted on the sleeve Inside, one of the rolling bearings is installed at one end of the sleeve, the other rolling bearing is installed at the other end of the sleeve, rolling bearing covers are provided at both ends of the joint bearing, and the The sleeve and the rolling bearing are sealed within the spherical plain bearing through the rolling bearing cover. 2. A bearing device according to claim 1, characterized in that, both ends of the sleeve are provided with inner hole grooves for installing the rolling bearings, and the two rolling bearings are installed on the two rolling bearings respectively. In the inner hole. 3 . The bearing device according to claim 2 , wherein a protrusion is provided at one end of the sleeve for positioning with the joint bearing. 4 . 4. A bearing device according to claim 3, wherein the rolling bearing cover comprises a cover body and an abutment, the outer diameter of the cover body is larger than the diameter of the inner ring of the spherical plain bearing, so The cover body is connected to the end of the sleeve through screws, the abutting portion is in contact with the rolling bearing, and the two rolling bearings are respectively axially positioned in the two inner parts through the two abutting portions. inside the hole. 5. A bearing device according to claim 4, characterized in that the sleeve and the spherical plain bearing are axially fixed together, and the two rolling bearings are axially fixed together with the sleeve , the sliding friction moment between the inner and outer rings of the joint bearing is greater than the rolling friction moment between the inner and outer rings of the rolling bearing.

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