CN211398318U - Bearing bush and gear box - Google Patents

Abstract

The application discloses bearing bush and gear box relates to gear drive's technical field. The bearing bush comprises a bush body, an oil inlet hole and an oil return hole, wherein the bush body is provided with a through hole; the oil inlet hole is formed in the bushing body and communicated with the through hole, and the oil inlet hole is formed in the radial direction of the through hole; the oil return hole is arranged on the bushing body and communicated with the through hole. So this application introduces the through hole through setting up in the inlet port of bearing bush with the lubricating oil in the case shell, and can lead back to the case shell in with the lubricating oil through setting up in the oil gallery of bearing bush, thereby realize the lubrication of bearing, the life of bearing has been prolonged, the maintenance cost is reduced, and the inlet port sets up for the radial direction along the through hole, thereby can directly communicate inlet tank and bush inlet port, avoid the oil leak risk, and the inlet port can be the unthreaded hole, processing technology has been simplified, and the production cost is reduced.

Description

Bearing bush and gear box

Technical Field

The application relates to the technical field of gear transmission equipment, in particular to a bearing bush and a gear box.

Background

In the process of assembling the bearing of the gear box, particularly the gear box of a rail transit subway, the bearing is generally positioned by an axle bearing bush, the bearing is arranged in a bearing hole of the axle bearing bush, and then the axle bearing bush is assembled with the box body through a screw.

In the prior art, the bearing is not easy to lubricate after being arranged in the axle bearing bush, and the service life of the bearing is shortened.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a bearing bush and gear box, its lubrication that can realize the bearing has prolonged the life of bearing.

The embodiment of the application is realized as follows:

a bearing bush comprises a bush body, an oil inlet hole and an oil return hole, wherein the bush body is provided with a through hole; the oil inlet hole is formed in the bushing body and communicated with the through hole, and the oil inlet hole is formed in the radial direction of the through hole; the oil return hole is formed in the bushing body and communicated with the through hole.

In one embodiment, the bushing body includes an annular plate disposed on an inner wall of the through hole to divide the through hole into a first region and a second region; the oil inlet hole is communicated with the first area, and the oil return hole is communicated with the second area. Wherein the first region is used for placing a bearing.

In an embodiment, an oil inlet groove is formed in the bushing body and located at the oil inlet, and the oil inlet groove is formed in the first area and located at a junction between the inner wall of the through hole and the annular plate.

In an embodiment, an oil return groove is formed in the bushing body and located at the oil return hole, and the oil return groove is formed in the second area and located on an inner wall of the through hole.

In one embodiment, the annular plate is provided with a first hole for passing a fastener to disassemble the bearing.

In an embodiment, the annular plate is provided with a second hole for passing a fastener to fix the outer ring of the bearing.

In an embodiment, the bushing body is provided with a third hole for passing a fastener to fix the bushing body.

In an embodiment, the bushing body is provided with a fourth hole for penetrating a fastener to detach the bushing body.

In one embodiment, the bearing bush includes a first ring groove, and the first ring groove is disposed on an outer wall of the bush body and used for placing the seal ring.

The utility model provides a gear box, includes case shell, pivot, bearing and bearing bush, the case shell have the mounting hole, and with the communicating oilhole that enters of mounting hole, the pivot is located in the case shell, the bearing bush is foretell bearing bush, bearing bush locates in the mounting hole, the bearing is located in the bearing bush, and the cover is located outside the pivot, wherein, bearing bush the inlet port with enter the oilhole and communicate with each other.

In one embodiment, the diameter of the oil inlet at the joint of the oil inlet and the case shell is larger than that of the oil inlet.

In one embodiment, the gear box comprises an outer static ring and an oil slinger, and the outer static ring cover is arranged on the through hole of the bearing bush; the oil slinger is sleeved on the rotating shaft and matched with the outer static ring.

Compared with the prior art, the beneficial effect of this application is: this application introduces the through-hole through setting up in the inlet port of bearing bush with the lubricating oil in the case shell to can lead back the case shell with lubricating oil in through setting up the oil gallery that sets up in bearing bush, thereby realize the lubrication of bearing, prolong the life of bearing, reduce the maintenance cost.

In addition, the oil inlet hole is arranged along the radial direction of the through hole, one end of the oil inlet hole is communicated with the through hole of the mounting bearing, and the other end of the oil inlet hole is communicated with the oil inlet hole of the box shell, so that the oil inlet groove and the oil inlet hole of the bush can be directly communicated, the oil leakage risk is avoided, the processing technology is simplified, and the production cost is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic structural diagram of a gearbox according to an embodiment of the present application;

FIG. 2 is an enlarged view of section A of FIG. 1 of the present application;

FIG. 3 is a cross-sectional view of a bearing cartridge shown in an embodiment of the present application;

FIG. 4 is a left side view of a bearing cartridge shown in an embodiment of the present application;

fig. 5 is an enlarged view of a portion a of fig. 1 of the present application.

Icon: 100-a gearbox; 200-a box shell; 210-mounting holes; 220-oil inlet holes; 230-oil inlet groove; 240-sealing ring; 300-a rotating shaft; 400-a bearing; 500-outer stationary ring; 600-oil slinger; 700-a bearing bush; 710-a liner body; 711-a through hole; 712-an annular plate; 711 a-first region; 711 b-second region; 713-second ring groove; 720-oil inlet hole; 721-oil inlet tank; 730-oil return hole; 731-oil return tank; 740-a first ring groove; 760-a first aperture; 770-a second bore; 780-a third bore; 790-fourth well; 800-gear.

Detailed Description

The terms "first," "second," "third," and the like are used for descriptive purposes only and not for purposes of indicating or implying relative importance, and do not denote any order or order.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should be noted that the terms "inside", "outside", "left", "right", "upper", "lower", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally arranged when products of the application are used, and are used only for convenience in describing the application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application.

In the description of the present application, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.

The technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings.

Please refer to fig. 1, which is a schematic structural diagram of a gearbox 100 according to an embodiment of the present application. A gearbox 100 comprises a housing 200, a rotating shaft 300, a bearing 400 and a bearing bush 700, wherein the housing 200 is provided with a mounting hole 210, an oil inlet hole 220 communicated with the mounting hole 210 and an oil inlet groove 230 communicated with the oil inlet hole 220, the rotating shaft 300 is arranged in the housing 200, and a gear 800 is arranged on the rotating shaft 300. The gear 800 and the shaft 300 may be integrally formed, or may be fixed together by a key connection or the like. The bearing cartridge 700 is disposed in the mounting hole 210.

The bearing bushing 700 includes a bushing body 710, an oil inlet hole 720 and an oil return hole 730, the bushing body 710 having a through hole 711; the oil inlet hole 720 is formed in the bushing body 710, the oil inlet hole 720 is communicated with the through hole 711, and the oil inlet hole 720 is formed in the radial direction of the through hole 711; the oil return hole 730 is formed in the bushing body 710, and the oil return hole 730 is communicated with the through hole 711. The oil inlet hole 720 of the bearing bush 700 is communicated with the oil inlet hole 220, and the bearing 400 is installed in the through hole 711 of the bearing bush 700 and sleeved outside the rotating shaft 300. The bearing 400 may be a tapered roller bearing or the like.

In one operation, the gearbox 100 is a track traffic subway gearbox and splash lubrication is used. The gear 800 in the housing 200 rotates to lift and throw the lubricating oil in the housing 200 to the inner wall of the housing 200, the lubricating oil flows into the oil inlet groove 230 of the housing 200 through the inner wall of the housing, the lubricating oil in the oil inlet groove 230 flows into the oil inlet hole 720 of the bearing bush 700 through the oil inlet hole 220, and flows into the through hole 711 of the bearing bush 700 through the oil inlet hole 720, so that the bearing 400 in the through hole 711 is lubricated. Further, the lubricating oil can be guided back into the housing 200 through the oil return hole 730 provided in the bearing bush 700.

In an embodiment, the gearbox 100 may be a gearbox of a rail transit subway, a speed reducer, or a gearbox for a machine tool. The rotating shaft 300 may be an input shaft, an output shaft, or an intermediate transmission shaft of the gearbox 100.

In the embodiment, the lubricating oil in the housing 200 is introduced into the through hole 711 through the oil inlet hole 720 arranged on the bearing bush 700, and the lubricating oil can be introduced back into the housing 200 through the oil return hole 730 arranged on the bearing bush 700, so that the bearing 400 is lubricated, the service life of the bearing 400 is prolonged, and the maintenance cost is reduced. And the oil path of the lubricating oil is arranged inside the bearing bush 700, so that the leakage of the lubricating oil is avoided.

Please refer to fig. 2, which is an enlarged view of a portion a of fig. 1. An oil inlet slot 721 is disposed on the bushing body 710 and located at the oil inlet hole 720, and the oil inlet slot 721 is communicated with the oil inlet hole 720 for guiding the lubricating oil entering the oil inlet hole 720 into the bearing 400. In this embodiment, the oil inlet 721 is formed on the inner wall of the through hole 711. The oil inlet hole 720 is arranged along the radial direction of the through hole 711, one end of the oil inlet hole is communicated with the through hole 711 of the mounting bearing 400, and the other end of the oil inlet hole 220 is communicated with the box shell 200, so that the oil inlet groove 721 and the bushing oil inlet hole 720 can be directly communicated, the oil leakage risk is avoided, the oil inlet hole 720 can be a smooth hole, the machining process is carried out without changing stations in the machining process, the manufacturing cost is low, the machining process is simplified, and the production cost is reduced.

The oil inlet hole 720 is a stepped hole, wherein the hole section of the oil inlet hole 720 at the joint with the case housing 200 is a hole with a larger hole diameter, and the hole diameter of the oil inlet hole 720 at the joint with the case housing 200 is larger than the hole diameter of the oil inlet hole 220, so that the lubricating oil in the oil inlet hole 220 of the case housing 200 can flow into the oil inlet hole 720. In another embodiment, the oil inlet hole 720 is a constant diameter hole, and the diameter of the oil inlet hole 720 is larger than that of the oil inlet hole 220.

In another embodiment, the oil inlet hole 720 is communicated with the oil inlet slot 721 through a process hole arranged along the axial direction of the bushing body 710, and the process hole is a blind hole opened on the left end surface of the bushing body 710. The opening of the fabrication hole through the bushing body 710 is threadedly connected with a threaded plug for sealing. In the embodiment, a process hole is not required to be machined, and a threaded plug is not required to be connected, so that the machining process is simplified, and the production cost is reduced.

In this embodiment, the gearbox 100 includes an outer stationary ring 500 and an oil slinger 600, and the outer stationary ring 500 is covered on a through hole 711 of the bearing bush 700; the oil slinger 600 is sleeved on the rotating shaft 300. The oil slinger 600 is provided at one side of the bearing 400 for slinging oil. The outer stationary ring 500 is fitted with an oil slinger 600, and can restrict the axial movement of the oil slinger 600.

The bearing cartridge 700 includes a first ring groove 740, the first ring groove 740 being provided on an outer wall of the cartridge body 710. Gearbox 100 includes seal 240. The packing 240 is disposed in the first ring groove 740 to improve sealability between the bearing cartridge 700 and the housing 200. Wherein the sealing ring 240 may be an O-ring 240, and the first groove 740 may have a rectangular cross-section.

Referring to fig. 3, a cross-sectional view of a bearing cartridge 700 according to an embodiment of the present application is shown. The bushing body 710 includes an annular plate 712, the annular plate 712 having a circular ring-shaped structure and being disposed on an inner wall of the through hole 711 and dividing the through hole 711 into a first region 711a and a second region 711 b; the oil inlet hole 720 communicates with the first area 711a, and the oil return hole 730 communicates with the second area 711 b. Wherein the first area 711a is located at the right side of the second area 711b for placing the bearing 400. A second annular groove 713 is provided on a surface of the annular plate 712 facing the first region 711 a. Wherein the bushing body 710 and the annular plate 712 may be integral.

The oil inlet groove 721 is disposed in the first region 711a and located at a boundary between the inner wall of the through hole 711 and the annular plate 712, and the cross section of the oil inlet groove 721 may be inverted "L", that is, the right end of the oil inlet groove 721 is bent and located at the right side of the oil inlet hole 720, so as to ensure that the lubricating oil enters the oil inlet groove 721 through the oil inlet hole 720 and enters the bearing 400. In addition, in the embodiment, the width of the oil inlet slot 721 is directly increased, so that the oil inlet slot 721 is communicated with the oil inlet hole 720, and other process holes do not need to be additionally processed to communicate the oil inlet slot 721 with the oil inlet hole 720, so that the processing procedures are reduced, and the production cost is reduced.

The oil return hole 730 has one end communicating with the case 200 and one end communicating with the through hole 711. An oil return groove 731 is formed in the bushing body 710 and located at the oil return hole 730, the oil return groove 731 is communicated with the oil return hole 730, the oil return groove 731 is formed in the inner wall of the through hole 711, and the oil return groove 731 can be a rectangular ring groove and is used for guiding the lubricating oil in the through hole 711 back into the case 200.

In this embodiment, there are 3 oil return grooves 731, and there are 3 corresponding oil return holes 730. Referring to fig. 3, an oil return groove 731 is formed in the second area 711b, and the oil return hole 730 is an inclined hole formed obliquely, so that a small amount of oil entering the second area 711b can be guided back to the housing 200. Referring to fig. 4, two oil return grooves 731 are disposed in the first area 711a, and the oil return hole 730 can be a vertically disposed straight hole for guiding the lubricating oil in the first area 711a back to the housing 200.

The oil slinger 600 and the outer stationary ring 500 (see fig. 5) are also opposite to the second region 711b, so that when a small amount of lubricating oil enters the second region 711b from the first region 711a, the oil slinger 600 rotates along with the rotation of the rotating shaft 300 to lift up the lubricating oil, and the lubricating oil is thrown into the second region 711b and then can flow back into the housing 200 through the oil return groove 731 and the corresponding oil return hole 730 arranged in the second region 711 b.

Referring to fig. 4, a left side view of a bearing cartridge 700 according to an embodiment of the present application is shown. The annular plate 712 is provided with a first hole 760 for receiving a fastener for removing the bearing 400. The first holes 760 may be threaded holes through the annular plate 712 and the fasteners may be screws, bolts, or the like. After the fastener is inserted into the first hole 760, it can be abutted against the bearing 400, so that the bearing 400 can be lifted up and removed from the bearing bush 700 by tightening the fastener.

The annular plate 712 is provided with a second hole 770 for receiving a fastener to secure the outer race of the bearing 400. The second bore 770 may be a pin bore through the annular plate 712 and the fastener may be a retaining pin or the like. After the fastener is inserted into the second hole 770, the fastener may abut against or be connected to the outer ring of the bearing 400, so that the outer ring of the bearing 400 may be prevented from rotating by the fastener. In one embodiment, the distance between the first hole 760 and the axis of the bearing bushing 700 is the same as the distance between the second hole 770 and the axis of the bearing bushing 700, i.e., the fastener inserted into the first hole 760 is also against the outer ring of the bearing 400.

The bushing body 710 is provided with a third hole 780 for inserting a fastener to fix the bushing body 710. Third hole 780 may be a threaded or unthreaded hole through annular plate 712 and the fastener may be a screw, bolt, or the like, so that bushing body 710 may be secured to enclosure 200 by tightening the fastener.

The bushing body 710 is provided with a fourth hole 790 for passing a fastener to disassemble the bushing body 710. The fourth hole 790 may be a threaded hole through the annular plate 712 and the fastener may be a screw, bolt, or the like. When the fastener is inserted into the fourth hole 790, it can be abutted against the housing 200, so that the bushing body 710 can be lifted up and removed from the housing 200 by tightening the fastener.

The first, second, third and fourth holes 760, 770, 780 and 790 are each provided in 1 or more, and in one embodiment, a plurality of the first, second, third and fourth holes 760, 770, 780 and 790 are each distributed in a circumferential array about the axis of the liner body 710.

Fig. 5 is an enlarged view of a portion a of fig. 1. The gear 800 in the housing 200 rotates to lift and throw the lubricant in the housing 200 to the inner wall of the housing 200, the lubricant flows into the oil inlet groove 230 of the housing 200 through the inner wall of the housing, the lubricant in the oil inlet groove 230 flows into the oil inlet hole 720 of the bearing bush 700 through the oil inlet hole 220, the lubricant enters the oil inlet groove 721 through the oil inlet hole 720, so that the bearing 400 in the first area 711a is lubricated by the oil inlet groove 721, and the lubricant flowing into the first area 711a and the second area 711b can respectively flow into the corresponding oil return grooves 731 (see fig. 1 and 4) and flow back into the housing 200 through the corresponding oil return holes 730 (see fig. 1 and 4).

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A bearing insert, comprising:

a bushing body having a through hole;

the oil inlet hole is arranged on the bushing body and communicated with the through hole, and the oil inlet hole is arranged along the radial direction of the through hole;

and the oil return hole is arranged on the bushing body and communicated with the through hole.

2. The bearing bushing of claim 1, wherein the bushing body comprises:

the annular plate is arranged on the inner wall of the through hole and divides the through hole into a first area and a second area;

the oil inlet hole is communicated with the first area, and the oil return hole is communicated with the second area;

wherein the first region is used for placing a bearing.

3. The bearing bush according to claim 2, wherein an oil inlet groove is formed in the bush body and located at the oil inlet, and the oil inlet groove is formed in the first area and located at a junction between the inner wall of the through hole and the annular plate;

and an oil return groove is formed in the position, where the oil return hole is formed, of the bushing body, and the oil return groove is formed in the second area and is located on the inner wall of the through hole.

4. The bearing cartridge as claimed in claim 2, wherein the annular plate is provided with a first hole for passing a fastener for removing the bearing.

5. The bearing cartridge as claimed in claim 2, wherein the annular plate is provided with a second hole for passing a fastener for fixing the outer race of the bearing.

6. The bearing bushing as claimed in any one of claims 1 to 5, wherein a third hole is provided on the bushing body for passing a fastener to fix the bushing body;

and a fourth hole is formed in the bushing body and used for penetrating a fastener to disassemble the bushing body.

7. The bearing cartridge of claim 6, wherein the bearing cartridge comprises:

the first ring groove is formed in the outer wall of the lining body and used for placing the sealing ring.

8. A gearbox, comprising:

the box shell is provided with a mounting hole and an oil inlet hole communicated with the mounting hole;

the rotating shaft is arranged in the box shell;

a bearing bush according to any one of claims 1 to 7, provided in the mounting hole;

the bearing is arranged in the bearing bush and sleeved outside the rotating shaft;

wherein the oil inlet hole of the bearing bush is communicated with the oil inlet hole.

9. The gearbox of claim 8, wherein the oil inlet hole has a larger diameter at the junction with the housing than the oil inlet hole.

10. A gearbox according to claim 8, comprising:

the outer static ring is covered on the through hole of the bearing bush; and

and the oil slinger is sleeved on the rotating shaft and matched with the outer static ring.

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