CN217558974U

CN217558974U - Gear box with leading bearing lubricating structure of main shaft

Info

Publication number: CN217558974U
Application number: CN202221167288.8U
Authority: CN
Inventors: 周坤; 张炯焱; 康翔朝; 马升; 庄博
Original assignee: Ningbo Baosi Energy Equipment Co Ltd
Current assignee: Ningbo Baosi Energy Equipment Co Ltd
Priority date: 2022-05-16
Filing date: 2022-05-16
Publication date: 2022-10-11
Anticipated expiration: 2032-05-16

Abstract

The utility model provides a gear box with a main shaft preposed bearing lubricating structure, which comprises a box body, wherein an oil tank is arranged at the lower part of the box body, a main shaft is arranged at the upper part of the box body, and a preposed bearing and a postpositive bearing are respectively arranged at the two ends of the main shaft; a front connecting flange is arranged on the front side of the box body, a front bearing seat is arranged on the inner side of the front connecting flange, and a front bearing is arranged in the front bearing seat; the side wall of the front bearing seat is provided with an oil guide hole, one end of the oil guide hole is opened upwards to face the inside of the box body, and the other end of the oil guide hole is opened downwards to face the inside of the front bearing seat. After the oilless air compressor runs, lubricating oil can be taken up by an oil thrower or a gear partially immersed in the lubricating oil of the oil tank when running, so that oil drops and oil gas are filled in the box body, the oil drops above the front bearing seat can flow into a front bearing inside the front bearing seat from the oil guide hole, and the front bearing of the main shaft is well lubricated.

Description

Gear box with leading bearing lubricating structure of main shaft

Technical Field

The utility model relates to a technical field of gear box, more exactly relate to a gear box with leading bearing lubricating structure of main shaft.

Background

In the prior art, an oil tank is arranged at the bottom of a gear box of an oil-free air compressor, lubricating oil is stored in the oil tank, a main shaft is arranged at the upper part of the gear box, bearings are arranged at two ends of the main shaft, and the bearings at two ends of the main shaft are generally lubricated by splashing lubricating oil through an oil thrower. By adopting the lubricating mode, the lubricating effect of the main shaft bearing can not be ensured, and once the main shaft bearing can not be well lubricated, the main shaft can not be stably driven, even the oilless air compressor can be damaged, and the loss caused is very large.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a gear box with leading bearing lubricating structure of main shaft, the leading bearing that enables the main shaft obtains good lubrication.

The technical solution of the utility model is to provide a gear box with a main shaft front bearing lubricating structure, which comprises a box body, wherein the lower part of the box body is provided with an oil tank, the upper part of the box body is provided with a main shaft, and the two ends of the main shaft are respectively provided with a front bearing and a rear bearing; the front side of the box body is provided with a front connecting flange, the inner side of the front connecting flange is provided with a front bearing seat, and a front bearing is arranged in the front bearing seat; the side wall of the front bearing seat is provided with an oil guide hole, one end of the oil guide hole is opened upwards to face the inside of the box body, and the other end of the oil guide hole is opened downwards to face the inside of the front bearing seat.

Compared with the prior art, the utility model discloses a gear box with leading bearing lubricating structure of main shaft has following advantage: after the oilless air compressor runs, lubricating oil can be brought up by the oil thrower or the gear partially immersed in the lubricating oil of the oil tank when running, so that the lubricating oil splashes, oil drops and oil gas are filled in the box body, the oil drops above the front bearing seat can flow into the front bearing inside the front bearing seat from the oil guide hole, and the front bearing of the main shaft is well lubricated.

Preferably, the inner side of the front connecting flange is further provided with an oil collecting sheet, the oil collecting sheet is connected with the upper end opening of the oil guide hole, and the oil collecting sheet and the upper end opening of the oil guide hole are arranged in a flush manner or are obliquely arranged from top to bottom. By adopting the structure, the oil collecting sheet can further collect oil drops, guide the oil drops into the oil guide holes and supply more lubricating oil to the front bearing.

Preferably, the upper side of the oil collecting sheet is provided with a side wall, the side wall and the oil collecting sheet form a flow guide groove, one end of the flow guide groove is open and is connected with an opening at the upper end of the oil guide hole, and the other end of the flow guide groove is also provided with a side wall. By adopting the structure, the side wall of the guide groove can further collect oil drops, and the oil drops are guided into the guide groove and then guided into the oil guide hole by the oil collecting sheet, so that more lubricating oil is supplied to the front bearing, and the oil drops on the oil collecting sheet are prevented from directly falling back into the oil tank.

Preferably, the flow guide groove is an integrated structure formed by bending the oil collecting sheet. By adopting the structure, the oil collecting sheet has simple structure, is convenient for production and processing, and has simple and easy bending operation.

Preferably, the oil collecting sheet and the front connecting flange are of an integral structure, or the oil collecting sheet is connected to the front connecting flange. By adopting the structure, the oil collecting sheet can be integrally cast with the front connecting flange, and can also be separately produced and connected on the front connecting flange.

Preferably, a connecting sheet bent downwards is arranged on one side of the oil collecting sheet connected with the upper end opening of the oil guide hole, and the connecting sheet is connected with the inner side of the front connecting flange. By adopting the structure, the oil collecting sheet has simple structure, is convenient for production and processing, has simple and easy bending operation, and the connecting sheet and the inner side of the preposed connecting flange can be in screw connection or welding.

Preferably, a front sealing end cover is arranged on the outer side of the front connecting flange, a bearing gland is arranged at one end of the front sealing end cover, the bearing gland extends into the front bearing seat and tightly presses the outer ring of the front bearing, an oil collecting cavity is arranged in the bearing gland, the oil collecting cavity is opposite to the end face of the front bearing, and a plurality of oil holes are formed in the cavity wall of the oil collecting cavity and used for communicating the inside of the front bearing seat with the oil collecting cavity. By adopting the structure, oil drops flow into the oil collecting cavity through the oil hole after flowing into the front bearing seat from the oil guide hole, and the oil collecting cavity continuously supplies lubricating oil to the end surface of the front bearing, so that the lubricating oil directly flows onto the rotor between the inner ring and the outer ring of the front bearing, and the lubricating effect of the bearing is good.

Preferably, the spindle is sleeved with a shaft sleeve, and the front sealing end cover is sleeved on the outer side of the shaft sleeve; an oil collecting groove is arranged on the outer side wall of the shaft sleeve and is positioned in the oil collecting cavity. By adopting the structure, the shaft sleeve is used for protecting the main shaft, and the oil collecting space of the oil collecting cavity can be enlarged by the oil collecting groove on the shaft sleeve.

Preferably, a shaft seal piece is arranged in the front sealing end cover, the inner side and the outer side of the shaft seal piece are respectively in sealing fit with the shaft sleeve and the front sealing end cover, and the shaft seal piece is positioned on the outer side of the oil collecting tank. By adopting the structure, the shaft seal piece seals between the shaft sleeve and the front sealing end cover, and the lubricating oil in the oil collection cavity is prevented from leaking out of the gear box along the shaft sleeve.

Drawings

Fig. 1 is a side view of the gear box with the lubricating structure for the front bearing of the main shaft according to the present invention.

Fig. 2 is a schematic view of the connection structure of the middle spindle of the present invention.

Fig. 3 is a schematic structural view of the front coupling flange of the present invention.

Fig. 4 is a schematic structural view of the front end cap of the present invention.

Fig. 5 is a longitudinal sectional view of fig. 1.

As shown in the figure: 1. the oil-water separator comprises a box body, 1-1 parts of an oil tank, 2 parts of a main shaft, 3 parts of a front sealing end cover, 3-1 parts of a bearing gland, 3-2 parts of an oil collecting cavity, 3-3 parts of an oil hole, 4 parts of a shaft sleeve, 4-1 parts of an oil collecting tank, 5 parts of a shaft sealing piece, 6 parts of a front bearing, 7 parts of a front connecting flange, 7-1 parts of an oil guide hole, 7-2 parts of an oil collecting sheet, 8 parts of a gear, 10 parts of a rear bearing, 11 parts of a rear flange, 12 parts of a rear oil pump, 13 parts of an oil suction pipe.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification.

In the drawings, the thickness, size, and shape of an object have been slightly exaggerated for convenience of explanation. The figures are purely diagrammatic and not drawn to scale.

It will be further understood that the terms "comprises," "comprising," "includes," "including," and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Further, when a statement such as "… at least one" appears after the list of listed features, the entire listed feature is modified rather than modifying individual elements in the list.

As shown in fig. 1 to 5, the utility model discloses a gear box with leading bearing lubrication structure of main shaft includes the box, and the lower part of box is provided with oil tank 1-1, and the upper portion of box is provided with main shaft 2, has set gradually axle sleeve 4, leading bearing 6, gear 8, rearmounted bearing 10 and rearmounted oil pump 12 by preceding to the back on the main shaft 2, and axle sleeve 4 and leading bearing 6 and the inner circle of rearmounted bearing 10 all with main shaft 2 interference fit, the one end of axle sleeve 4 and the inner circle contact of leading bearing 6 or compress tightly.

The front side of the box body is provided with a front connecting flange 7, the inner side of the front connecting flange 7 is provided with a front bearing seat, and a front bearing 6 is arranged in the front bearing seat. The outer side of the front connecting flange 7 is provided with a front sealing end cover 3, the front sealing end cover 3 is sleeved on the outer side of the shaft sleeve 4, a shaft sealing piece 5 is arranged in the front sealing end cover 3, and the inner side and the outer side of the shaft sealing piece 5 are respectively in sealing fit with the outer side of the shaft sleeve 4 and the front sealing end cover 3. One end of the front sealing end cover 3, which is opposite to the front bearing 6, is provided with a bearing gland 3-1, and the bearing gland 3-1 extends into the front bearing seat and compresses an outer ring of the front bearing 6.

The rear side of the box body is provided with a rear flange 11, the inner side of the rear flange 11 is provided with a rear bearing seat, a rear bearing 10 is installed in the rear bearing seat, and the rear bearing seat is tightly pressed with the outer ring of the rear bearing 10. The rear oil pump 12 is installed outside the rear flange 11, and the rear oil pump 12 is in transmission connection with the rear end of the main shaft 2. An oil suction pipe 13 is arranged between the rear oil pump 12 and the oil tank 1-1, and the rear oil pump 12 can draw lubricating oil from the oil tank 1-1 through the oil suction pipe 13.

As shown in fig. 3, an oil guide hole 7-1 is formed in a side wall of the front bearing seat, one end of the oil guide hole 7-1 opens upward to the inside of the box body, and the other end opens downward to the inside of the front bearing seat; the inner side of the front connecting flange 7 is also provided with an oil collecting sheet 7-2, the oil collecting sheet 7-2 is a cross-shaped small metal plate, the oil collecting sheet 7-2 can be bent to form a flow guide groove, three of the cross-shaped small metal plate are bent upwards, the other cross-shaped small metal plate is bent downwards, so that the flow guide groove is provided with side walls on three sides, and an opening is formed on one side; the opening of the diversion trench is connected with the upper end opening of the oil guide hole 7-1, and the bottom of the diversion trench can be flush with the upper end opening of the oil guide hole 7-1 or inclined from top to bottom towards the upper end opening of the oil guide hole 7-1; the surface of the opening of the diversion trench, which is bent downwards, is provided with a connecting sheet, and the connecting sheet is in screw connection with the inner side of the front connecting flange 7 and can also be welded.

As shown in fig. 4 and 5, an oil collecting cavity 3-2 is arranged in a bearing gland 3-1, the oil collecting cavity 3-2 is opposite to the end surface of a front bearing 6, a plurality of oil holes 3-3 are arranged on the cavity wall of the oil collecting cavity 3-2, and the oil holes 3-3 enable the inside of the front bearing seat to be communicated with the oil collecting cavity 3-2; the outer side wall of the shaft sleeve 4 is provided with an oil collecting groove 4-1, and the oil collecting groove 4-1 is positioned in the oil collecting cavity 3-2, so that the oil collecting space of the oil collecting cavity 3-2 can be enlarged.

After the oil-free air compressor with the gear box of the main shaft preposed bearing lubricating structure is applied to operation, lubricating oil can be brought up by an oil thrower or a gear partially immersed in the lubricating oil of an oil tank during operation, so that the lubricating oil is splashed to be scattered, oil drops and the oil gas fill the interior of a box body, oil drops can be collected by the groove wall and the groove bottom of a diversion groove formed by oil collecting sheets 7-2, the oil drops are converged into oil liquid in the groove of the diversion groove, the oil liquid is guided to an oil guide hole 7-1 through the groove bottom and flows into a preposed bearing seat through the oil guide hole 7-1, and part of the oil drops can directly flow into the preposed bearing seat from the oil guide hole 7-1; the oil liquid flowing into the interior of the front bearing seat enters the oil collecting cavity 3-2 through the oil hole 3-3, and the oil collecting cavity 3-2 continuously supplies lubricating oil to the end face of the front bearing 6, so that the lubricating oil directly flows onto a rotor between the inner ring and the outer ring of the front bearing 6, and the lubricating effect of the bearing is good. The shaft seal 5 can prevent the lubricating oil in the oil collection cavity from leaking out of the gear box along the shaft sleeve.

In this embodiment, the guiding groove may be other section materials with an opening, such as a hemispherical shape or a truncated cone shape with an opening, and the opening is connected to the upper end opening of the oil guiding hole 7-1, and it is ensured that the oil in the guiding groove can be guided into the oil guiding hole 7-1 by the side wall or the inner bottom surface of the guiding groove. The oil collecting sheet 7-2 can be not arranged into a flow guide groove, still keeps a sheet structure, and can also be used for collecting oil drops and guiding the oil drops into the oil guide hole 7-1. The guide groove or the oil collecting sheet 7-2 can be produced by casting and molding the front connecting flange 7 integrally.

The above are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention; the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and equivalent arrangements as is within the spirit and scope of the present invention.

Claims

1. A gear box with a main shaft front bearing lubricating structure comprises a box body (1), wherein an oil tank (1-1) is arranged at the lower part of the box body (1), a main shaft (2) is arranged at the upper part of the box body, and a front bearing (6) and a rear bearing (10) are respectively arranged at two ends of the main shaft (2); the device is characterized in that a front connecting flange (7) is arranged on the front side of the box body, a front bearing seat is arranged on the inner side of the front connecting flange (7), and a front bearing (6) is arranged in the front bearing seat; an oil guide hole (7-1) is formed in the side wall of the front bearing seat, one end of the oil guide hole (7-1) is opened upwards to face the inside of the box body, and the other end of the oil guide hole is opened downwards to face the inside of the front bearing seat.

2. The gearbox with the main shaft front bearing lubricating structure according to claim 1, characterized in that the inner side of the front connecting flange (7) is further provided with oil collecting sheets (7-2), the oil collecting sheets (7-2) are connected with the upper end opening of the oil guide hole (7-1), and the oil collecting sheets (7-2) are arranged flush with the upper end opening of the oil guide hole (7-1) or are arranged obliquely from top to bottom to the upper end opening of the oil guide hole (7-1).

3. The gearbox with the main shaft front bearing lubricating structure according to claim 2, characterized in that the oil collecting sheet (7-2) is provided with a side wall on the upper side, the side wall and the oil collecting sheet (7-2) form a flow guide groove, one end of the flow guide groove is open and connected with the upper end opening of the oil guide hole (7-1), and the other end is also provided with a side wall.

4. The gearbox with the main shaft front bearing lubricating structure as set forth in claim 3, characterized in that the guide grooves are of an integral structure formed by bending oil collecting sheets (7-2).

5. Gearbox provided with a spindle front bearing lubrication structure according to claim 2, characterized in that the oil collecting fins (7-2) are of one-piece construction with the front coupling flange (7) or the oil collecting fins (7-2) are attached to the front coupling flange (7).

6. The gearbox with the lubricating structure for the front bearing of the main shaft as recited in claim 2, wherein a connecting piece bent downwards is arranged on one side of the oil collecting piece (7-2) connected with the upper end opening of the oil guide hole (7-1), and the connecting piece is connected with the inner side of the front connecting flange (7).

7. The gear box with the main shaft preposed bearing lubricating structure according to claim 2, characterized in that a preposed sealing end cover (3) is arranged at the outer side of the preposed connecting flange (7), a bearing gland (3-1) is arranged at one end of the preposed sealing end cover (3), the bearing gland (3-1) extends into the preposed bearing seat and tightly presses the outer ring of the preposed bearing (6), an oil collecting cavity (3-2) is arranged in the bearing gland (3-1), the oil collecting cavity (3-2) is opposite to the end face of the preposed bearing (6), a plurality of oil holes (3-3) are arranged on the cavity wall of the oil collecting cavity (3-2), and the oil holes (3-3) are used for communicating the inside of the preposed bearing seat with the oil collecting cavity (3-2).

8. The gearbox with the main shaft preposed bearing lubricating structure as recited in claim 7, wherein a shaft sleeve (4) is sleeved on the main shaft (2), and the preposed sealing end cover (3) is sleeved on the outer side of the shaft sleeve (4); an oil collecting groove (4-1) is formed in the outer side wall of the shaft sleeve (4), and the oil collecting groove (4-1) is located in the oil collecting cavity (3-2).

9. The gearbox with the main shaft front bearing lubricating structure according to claim 8, characterized in that a shaft seal (5) is arranged in the front seal end cover (3), the inner side and the outer side of the shaft seal (5) are respectively in sealing fit with the shaft sleeve (4) and the front seal end cover (3), and the shaft seal (5) is positioned on the outer side of the oil collecting tank (4-1).