CN104165191A - Bearing spacing and adjusting device - Google Patents

Abstract

The invention discloses a bearing limit adjustment device, which comprises a bearing body with a through inner hole in the left and right direction, the inner hole of the bearing body is threadedly equipped with an adjustment sleeve which acts to compress the bearing, the adjustment There are external threads on the outer peripheral surface of the sleeve, and the left end of the adjustment sleeve has a positioning surface for press fit with the end face of the bearing outer ring. The outer peripheral surface of the sleeve is also provided with limiting slots extending in the left and right directions for inserting the guide keys that limit the rotation of the adjusting sleeve. The invention provides a bearing limit adjustment device which can ensure the cooperation and compression of the outer ring of the bearing through axial adjustment. The device prevents the vibration of the bearing, reduces the wear of the bearing, and prolongs the service life of the bearing. .

Description

Bearing limit adjustment device

technical field

The invention relates to a bearing limit adjustment device.

Background technique

Bearings are components that fix and reduce the friction coefficient of loads in various mechanical transmission processes. When other parts move relative to each other on the shaft, they are used to reduce the friction coefficient during power transmission and keep the center of the shaft fixed. parts. In the process of mechanical transmission, shafts and bearings will vibrate, especially in the process of large load transmission. The existing way to prevent bearing vibration is to use the bearing end cover inserted into the bearing mounting hole of the bearing housing to compress the outer ring of the bearing in the axial direction, and the outer flange part of the bearing end cover is fixed by bolts. on the bearing body. However, due to certain manufacturing errors in bearings, bearing end caps, and bearing housings, in some cases there will inevitably be some gaps between the pressing end of the bearing end cap and the corresponding end face of the outer ring of the bearing. The cover has been fixed with the bearing body, and the bearing cannot be pressed tightly by adjusting the axial position of the bearing end cover at this time. Due to the existence of the fit gap, the bearing will vibrate during operation, and the vibration will not only make the rotation accuracy of the shaft Reduced, and it will accelerate the wear of the bearing and shorten the service life of the bearing. In addition, the thickness of different types of bearings used is also different, which will also cause different bearings to be pressed together with bearing end covers of different sizes, thereby increasing the cost.

Contents of the invention

The purpose of the present invention is to provide a bearing limit adjustment device that can ensure the cooperation and compression with the outer ring of the bearing through axial adjustment.

In order to achieve the above object, the present invention adopts the following technical solutions:

The bearing limit adjustment device includes a bearing body with a through inner hole in the left and right directions. The inner hole thread of the bearing body is equipped with an adjustment sleeve that compresses the bearing. The outer peripheral surface of the adjustment sleeve is provided with external threads. , the left end of the adjustment sleeve has a positioning surface for press fit with the end face of the outer ring of the bearing, the bearing body is equipped with a guide key slidingly along the radial direction of the inner hole, and the outer peripheral surface of the adjustment sleeve is also equipped with left and right The limit groove extending in the direction is inserted into the guide key that limits the rotation of the adjustment sleeve.

The adjusting sleeve includes a screw plug and an adjusting pad, the adjusting pad is fixedly connected to the right end of the screw plug through a stud, the positioning surface is set at the left end of the screw plug, the external thread is set on the outer peripheral surface of the screw plug, and the The limiting groove is arranged on the outer peripheral surface of the adjusting pad.

The left end of the screw plug is provided with an annular boss, and the positioning surface is the annular end surface of the left end of the annular boss.

The right end of the screw plug is provided with a threaded hole extending left and right for screwing in the stud, and the adjusting pad is provided with a threaded hole penetrating left and right corresponding to the threaded hole for screwing in the stud.

The bearing seat body is a bearing sleeve, and the opening of the inner hole at the right end of the bearing sleeve is sealed with a bearing cover.

The beneficial effects of the present invention are: when the shaft and the bearing assembled at one end of the shaft are installed on the bearing body, adjust the axial position by rotating the adjusting sleeve so that the positioning surface at the end presses the outer ring of the bearing, and the sliding assembly One end of the guide key on the bearing body is inserted into the limit groove on the adjustment sleeve. The guide key restricts the rotation of the adjustment sleeve, and the adjustment sleeve presses the outer ring of the bearing to limit the rotation and axial movement of the outer ring of the bearing, thereby preventing the vibration of the bearing, reducing the wear of the bearing, and prolonging the service life of the bearing. It also maintains the normal working position and rotation accuracy of the shaft.

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of the present invention.

Detailed ways

The embodiment of the bearing limit adjustment device of the present invention is shown in Figure 1: the device includes a bearing seat body with an inner hole penetrating in the left and right directions, and a screw plug that is threadedly assembled with the inner hole of the bearing seat to compress the bearing 7 4. The adjusting pad 3 which restricts the rotation of the screw plug 4 is threadedly connected with the adjusting screw plug 4 and the bearing cover 6 which is sealed on the opening of the inner hole of the bearing housing.

The bearing seat body is the bearing sleeve 1, the inner hole wall on the left side of the bearing sleeve 1 is used as a positioning surface for supporting and matching the outer peripheral surface of the bearing 7 outer ring, and the inner hole on the right side is a threaded hole for the screw plug 4 to rotate and fit. The right end of 1 is provided with a guide groove for radial sliding fit of guide key 2. The screw plug 4 has a through hole penetrating left and right for the shaft 8 to penetrate. The left end of the screw plug 4 is provided with an annular boss 41. The left end of the annular boss 41 has a positioning surface for pressing the right end surface of the outer ring of the bearing 7. The screw plug 4 The right end is circumferentially spaced and provided with two threaded boring holes for the insertion of the stud 5 .

The adjustment pad 3 is a ring structure, the end surface of the adjustment pad 3 is provided with a threaded hole matching the threaded hole provided on the screw plug 4, and the outer peripheral surface of the adjustment pad 3 is provided with a left and right through limit for the guide key 2 to stop and cooperate. The groove 31, the adjustment pad 3 has a through hole through which the shaft 8 penetrates left and right. The adjustment pad 3 and the screw plug 4 are fixedly connected together by the stud 5 to form an adjustment sleeve for pressing the outer ring of the bearing. The guide key 2 is radially slidably fitted in the guide groove of the bearing sleeve 1, and the guide key 2 is inserted into the The limit groove 31 on the adjustment pad 3 is used to limit the rotation of the adjustment pad 3 and the screw plug 4 .

The adjustment sleeve in the above-mentioned embodiment is a split structure in which the screw plug and the adjustment pad are connected by studs, so that the adjustment pad can be replaced to meet the installation of different types of bearings, and the limit grooves of different adjustment pads can be set in different positions, so that the guide key can be inserted into the limit groove when adjusting the screw plug. Of course, in other embodiments, the adjustment sleeve may not be provided with an adjustment pad, but only consist of a screw plug, or the screw plug and the adjustment pad may be made into an integrated structure. Above the external thread section.

In the above-mentioned embodiment, the bearing seat body adopts the bearing sleeve. In other embodiments, the bearing sleeve may not be provided, the bearing seat is used as the bearing seat body, and the adjusting sleeve is directly threaded into the inner hole of the bearing seat. The inner hole of the seat is radially slidably assembled on the bearing seat, and the opening of the inner hole of the bearing seat is sealed with a bearing cover.

In other embodiments, the adjusting pad may be fixed on the right end of the screw plug by welding instead of stud connection.

In other embodiments, when the screw plug is a hollow cylindrical structure, the left end of the screw plug may not be provided with an annular boss, and the annular end surface of the screw plug is directly used as a positioning surface for press-fitting the end surface of the bearing outer ring.

In other embodiments, no bearing cover may be provided.

In other embodiments, the annular boss provided at the left end of the screw plug can also be two or three arc-shaped bosses distributed at the left end of the adjusting screw plug at intervals in the circumferential direction, and the left end surface of the arc-shaped boss jointly forms a The positioning surface of the ring end face press fit.

In other embodiments, one stud can be provided, and the threaded bore on the screw plug can be provided as a left and right through threaded hole.

In other embodiments, when the exposed portion of the shaft passing through the bearing is small, the screw plug and the adjusting pad may not be provided with through holes for the shaft to pass through in the left and right directions.

In other embodiments, the limiting groove provided on the adjusting pad may not be connected left and right, but may be connected with the left or right end of the adjusting pad, or may not communicate with both ends of the adjusting pad.

Claims (5)

1. Bearing limit adjustment device, including a bearing seat body with a through inner hole in the left and right directions, characterized in that: the inner hole thread of the bearing seat body is equipped with an adjustment sleeve that compresses the bearing, and the outer circumference of the adjustment sleeve There are external threads on the surface, and the left end of the adjustment sleeve has a positioning surface for press fit with the end face of the outer ring of the bearing. The surface is also provided with limiting slots extending in the left and right directions for inserting the guide keys that limit the rotation of the adjustment sleeve. 2. The bearing limit adjustment device according to claim 1, characterized in that: the adjustment sleeve includes a screw plug and an adjustment pad, the adjustment pad is fixedly connected to the right end of the screw plug through a stud, and the positioning surface is set on the At the left end of the screw plug, the external thread is arranged on the outer peripheral surface of the screw plug, and the limiting groove is arranged on the outer peripheral surface of the adjusting pad. 3 . The bearing limit adjustment device according to claim 2 , wherein an annular boss is provided at the left end of the screw plug, and the positioning surface is an annular end surface at the left end of the annular boss. 4 . 4. The bearing limit adjustment device according to claim 2, characterized in that: the right end of the screw plug is provided with a threaded hole extending left and right for the screw to be screwed into, and the adjustment pad is provided with a left and right penetrating hole. A threaded hole corresponding to the threaded bore for screwing in the stud. 5. The bearing limit adjustment device according to any one of claims 1-4, characterized in that: the bearing seat body is a bearing sleeve, and the opening of the inner hole at the right end of the bearing sleeve is sealed with a bearing Cover. the