CN204942297U - Machine bearing seal arrangement - Google Patents

Abstract

The utility model relates to a machine tool bearing sealing device, which belongs to the field of machine tool shaft transmission equipment. Abut against the flange cover of the inner ring, an outer ring spacer is provided between the flange cover of the inner ring and the rotating shaft, the right end face of the inner ring of the bearing is against the left end face of the outer ring spacer, and the flange cover of the inner ring is set There is an inner groove, and the outer ring spacer is provided with an annular boss, which is embedded in the inner groove to form a labyrinth seal. There is an annular groove on the left end surface of the bearing seat, and on the left end of the shaft shoulder of the rotating shaft. An oil retaining spacer is installed, and the ring boss is embedded in the ring groove to form a labyrinth seal. The utility model has the advantages of simple structure, easy assembly and low cost; both ends of the bearing seat are of a labyrinth sealing structure, and a small amount of dust and oil flow out through the oil discharge hole, and will not enter the inside of the bearing, effectively improving the sealing effect and sealing ability.

Description

Machine Tool Bearing Sealing Device

technical field

The utility model belongs to the field of machine tool shaft transmission equipment, in particular to a machine tool bearing sealing device.

Background technique

The lubrication of the shaft of the machine tool is generally lubricated with lubricating oil, and the bearing of the shaft is generally lubricated with grease. In actual work, mixed impurities such as lubricating oil, cutting fluid, and dust will flow into the shaft bearing, resulting in the loss or deterioration of the grease in the shaft bearing. , causing damage to the bearing when the bearing is running. The sealing of the rotating shaft bearing of the existing machine tool generally adopts an oil seal or a sealed bearing. The oil seal installed between the bearing seat and the shaft is a contact seal. When the shaft rotates at high speed, it will generate a lot of heat when it rubs against the oil seal, which will lead to aging and wear of the oil seal, burning of the shaft bearing and high temperature rise of the surrounding parts, which will affect the sealing effect and The precision of the rotating shaft and even the machine tool has a great influence, and the installation of the oil seal requires higher machining precision of the bearing seat, otherwise the heat will be more serious. Sealed bearings are expensive, difficult to maintain, and cannot be used on a large scale.

Utility model content

The utility model provides a machine tool bearing sealing device, both ends of the bearing seat are sealed, the sealing effect and sealing ability are good, the versatility is strong, and the cost is low. High, not conducive to the defects of general application.

The utility model machine tool bearing sealing device includes an inner ring flange cover, the inner ring flange cover is fixed on the right end of the bearing seat, the rotating shaft is installed on the bearing seat through the bearing, and the right end surface of the outer ring of the bearing is against the inner ring flange cover. There is an outer ring spacer between the inner ring flange cover and the rotating shaft, the right end face of the inner ring of the bearing is against the left end face of the outer ring spacer, the right end of the outer ring spacer is provided with a lock nut, and the inner ring flange cover There is an inner groove, and the outer ring spacer is provided with an annular boss one, which is embedded in the inner groove to form a labyrinth seal. There is an annular groove on the left end surface of the bearing seat, and the left end of the shaft shoulder An oil-retaining spacer is installed on the oil-retaining spacer, and the oil-retaining spacer is provided with an annular boss 2, which is embedded in the annular groove to form a labyrinth seal. The sealing structure effectively improves the sealing effect and sealing ability.

A sealing ring is provided at the fixed connection between the oil retaining spacer and the rotating shaft, which effectively isolates the invasion of foreign impurities, well protects the bearing, and improves the service life of the bearing.

The left end surface of the oil retaining spacer should protrude from the left end surface of the bearing seat by no less than 5 mm. When the rotating shaft is vertically used, the lubricating oil falls on the left end surface of the oil retaining spacer. The sealing effect is enhanced.

The bearing seat is provided with an oil discharge hole one, which is located at the left end of the bearing seat and communicates with the bottom surface of the annular groove. When lubricating oil and cutting oil flow into the labyrinth groove along the outer wall of the oil retaining spacer, the Oil drain hole one out.

The flange cover of the inner ring is provided with an oil discharge hole 2, which communicates with the bottom surface of the inner groove. When the lubricating oil and cutting oil flow into the labyrinth groove along the outer wall of the outer ring spacer, they are The oil drain hole 2 flows out.

Compared with the prior art, the utility model has the advantages of:

The sealing structure is simple, easy to assemble, and low in cost; both ends of the bearing seat are labyrinth seal structures, and the oil retaining spacer also has the effect of throwing oil, which effectively improves the sealing effect and sealing ability, even if there is a small amount of lubricating oil and cutting oil When entering the labyrinth, it can also flow out through the oil drain hole, and will not enter the inside of the bearing. A sealing ring is provided between the oil retaining spacer and the rotating shaft, which further improves the sealing effect and effectively isolates the invasion of foreign impurities. It is very good protection The rotating shaft bearing is improved, and the service life of the rotating shaft bearing is improved.

Description of drawings

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

In the figure: 1. Rotating shaft, 2. Sealing ring, 3. Oil retaining spacer, 4. Annular groove, 5. Bearing seat, 6. Bearing, 7. Inner groove, 8. Inner ring flange cover, 9. Outer ring spacer, 10, lock nut, 11, oil drain hole one, 12, oil drain hole two, 13, annular boss one, 14, annular boss two.

detailed description

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

The machine tool bearing sealing device shown in Figure 1 includes an inner ring flange cover 8, the inner ring flange cover 8 is fixed on the right end of the bearing seat 5, the rotating shaft 1 is installed on the bearing seat 5 through the bearing 6, and the right end surface of the outer ring of the bearing 6 Abut on the inner ring flange cover 8, an outer ring spacer 9 is arranged between the inner ring flange cover 8 and the rotating shaft 1, the right end surface of the inner ring of the bearing 6 is against the left end surface of the outer ring spacer 9, and the outer The right end of the ring spacer 9 is provided with a lock nut 10, the inner ring flange cover 8 is provided with an inner groove 7, and the outer ring spacer 9 is provided with an annular boss 13, and the annular boss 13 is embedded in the inner concave The groove 7 cooperates to form a labyrinth seal. The left end surface of the bearing seat 5 is provided with an annular groove 4. The oil retaining spacer 3 is installed on the left end of the shaft shoulder of the rotating shaft 1. The oil retaining spacer 3 is provided with an annular boss 2 14. The annular boss 2 14 is embedded in the annular groove 4 to form a labyrinth seal, the oil retaining spacer 3 is fixed on the rotating shaft 1, and the labyrinth seal structure at both ends of the bearing seat 5 effectively improves the sealing effect and sealing ability.

A sealing ring 2 is provided at the fixed connection between the oil retaining spacer 3 and the rotating shaft 1, which effectively isolates the invasion of foreign impurities, protects the bearing 6 well, and improves the service life of the bearing 6 .

The left end face of the oil retaining spacer 3 should protrude from the left end face of the bearing seat 5 by no less than 5 mm. When the rotating shaft is vertically used, the lubricating oil falls on the left end face of the oil retaining spacer 3. Due to the centrifugal force, most of the lubricating oil can be thrown away, thereby The sealing effect is strengthened.

The bearing seat 5 is provided with an oil discharge hole 11, which is located at the left end of the bearing seat 5 and communicates with the bottom surface of the annular groove 4. When lubricating oil or cutting oil flows into the labyrinth groove along the outer wall of the oil retaining spacer 3, the Oil drain hole 11 on the bearing seat 5 flows out.

The flange cover 8 of the inner ring is provided with an oil discharge hole 2 12, and the oil discharge hole 2 12 communicates with the bottom surface of the inner groove 7. When the lubricating oil or cutting oil flows into the labyrinth groove along the outer wall of the outer ring spacer 9, the inner ring method Oil discharge hole two 12 on the blue cover 8 flows out.

To sum up, the utility model has the advantages of simple structure, easy assembly and low cost; both ends of the bearing seat are of labyrinth sealing structure, and the oil retaining spacer also has the function of throwing oil, which effectively improves the sealing effect and sealing ability, even if there is a small amount of The lubricating oil and cutting oil enter the labyrinth, and can also flow out through the oil discharge hole, and will not enter the bearing. A sealing ring is provided between the oil retaining spacer and the rotating shaft, which further improves the sealing effect and effectively isolates foreign impurities. Intrusion protects the shaft bearing well and improves the service life of the shaft bearing.

In the description of the present utility model, the orientation or positional relationship indicated by the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom" etc. are based on the attached The orientation or positional relationship shown in the figure is only for the convenience of describing the utility model and does not require the utility model to be constructed and operated in a specific orientation, so it cannot be construed as a limitation of the utility model.

Claims (5)

1. A machine tool bearing sealing device, comprising an inner ring flange cover (8), the inner ring flange cover (8) is fixed on the right end of the bearing seat (5), and the rotating shaft (1) is installed on the bearing seat ( 5), the right end surface of the outer ring of the bearing (6) abuts against the inner ring flange cover (8), which is characterized in that an outer ring spacer ( 9), the right end surface of the inner ring of the bearing (6) is against the left end surface of the outer ring spacer (9), the right end of the outer ring spacer (9) is provided with a lock nut (10), and the inner ring flange cover (8 ) is provided with an inner groove (7), and the outer ring spacer (9) is provided with an annular boss (13), and the annular boss (13) is embedded in the inner groove (7) to form a labyrinth seal , an annular groove (4) is provided on the left end surface of the bearing seat (5), an oil retaining spacer (3) is installed on the left end of the shaft shoulder of the rotating shaft (1), and an annular boss is arranged on the oil retaining spacer (3) Two (14), the annular boss two (14) are embedded in the annular groove (4) to cooperate to form a labyrinth seal, and the oil retaining spacer (3) is fixed on the rotating shaft (1). 2. The machine tool bearing sealing device according to claim 1, characterized in that a sealing ring (2) is provided at the fixed connection between the oil retaining spacer (3) and the rotating shaft (1). 3. The machine tool bearing sealing device according to claim 1 or 2, characterized in that the left end surface of the oil retaining spacer (3) protrudes from the left end surface of the bearing seat (5) by no less than 5mm. 4. The machine tool bearing sealing device according to claim 1, characterized in that the bearing seat (5) is provided with an oil discharge hole (11), and the oil discharge hole (11) is located at the left end of the bearing seat (5) and is connected to the ring The bottom surfaces of the grooves (4) are connected. 5. The machine tool bearing sealing device according to claim 1, characterized in that the inner ring flange cover (8) is provided with two oil discharge holes (12), and the second oil discharge hole (12) is connected with the inner groove ( 7) The bottom surfaces are connected.