CN216382229U - Rolling bearing structure for shaft part - Google Patents

Abstract

The utility model provides a rolling bearing structure for a shaft part, which solves the problem that the existing bearing is poor in waterproof effect. The rolling bearing structure for the shaft comprises an outer ring and an inner ring in interference fit with the shaft, wherein the inner side wall of the front end of the outer ring is provided with a convex ring, the front end surface and the rear end surface of the convex ring are respectively and integrally formed with a front convex part and a rear convex part, the front convex part and the rear convex part are annular, and the front convex part, the rear convex part, the convex ring and the outer ring are coaxially arranged; the front convex part forms sealing with the outer wall of the shaft part through the oil seal, an annular groove for the rear convex part to insert is formed in the front end face of the inner ring, the groove width of the annular groove is larger than the thickness of the rear convex part, the annular groove and the rear convex part are in clearance fit to form a tortuous channel, and the width of the tortuous channel is 0.05-0.35 mm. This antifriction bearing structure for shaft part water-proof effects is good.

Description

Rolling bearing structure for shaft part

Technical Field

The utility model relates to a rolling bearing structure, in particular to a rolling bearing structure for a shaft element.

Background

The bearing is an important part in the modern mechanical equipment, and the main function of the bearing is to support a mechanical rotating body, reduce the friction coefficient in the movement process of the mechanical rotating body and ensure the rotation precision of the mechanical rotating body.

The rolling bearing is an important class of bearings, the rolling bearing rotates by means of hard friction among an outer ring, a roller and an inner ring, lubricating grease is required to be lubricated in the middle when the rolling bearing is used, and if water enters the middle of the rolling bearing, the water does not have a lubricating effect, so that the bearing is damaged for a long time. Therefore, under some water-containing working conditions (such as machining), at least one end of the bearing is provided with the oil seal for water prevention, but when the oil seal is damaged (naturally damaged or damaged by external force), the bearing completely enters a naked state, and the service life of the bearing is greatly shortened.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems in the prior art and provides a rolling bearing structure for a shaft part, which has a good waterproof effect.

The purpose of the utility model can be realized by the following technical scheme: a rolling bearing structure for a shaft part comprises an outer ring and an inner ring in interference fit with the shaft part, and is characterized in that the inner side wall of the front end of the outer ring is provided with a convex ring, the front end surface and the rear end surface of the convex ring are respectively and integrally formed with a front convex part and a rear convex part, the front convex part and the rear convex part are annular, and the front convex part, the rear convex part, the convex ring and the outer ring are coaxially arranged; the front convex part forms sealing with the outer wall of the shaft part through the oil seal, an annular groove for the rear convex part to insert is formed in the front end face of the inner ring, the groove width of the annular groove is larger than the thickness of the rear convex part, the annular groove and the rear convex part are in clearance fit to form a tortuous channel, and the width of the tortuous channel is 0.05-0.35 mm.

The convex ring blocks the gap between the inner ring and the outer ring for placing the ball, so that water can only enter the gap through the shaft part, meanwhile, the annular groove and the rear convex part are matched to form a tortuous passage with extremely small width, the tortuous passage and the oil seal are axially distributed, the sealing path is effectively prolonged, the difficulty of breaking through the sealing path by water flow is increased, and the waterproof effect is extremely good so as to prolong the service life.

In the rolling bearing structure for the shaft part, the convex strip is integrally formed on the rear end face of the convex ring, the length of the convex strip extends along the radial direction of the convex ring, and one end of the convex strip extends to the rear convex part, so that the strength of the rear convex part and the strength of the outer ring are enhanced, and the structural stability and the strength are improved.

In the rolling bearing structure for the shaft element, at least two convex strips are uniformly distributed along the circumferential direction of the outer ring.

In the rolling bearing structure for the shaft element, the inner hole at the front end of the inner ring is a taper hole with the diameter gradually reduced from front to back, and the inner wall of the taper hole extends to the front end face of the inner ring.

In foretell rolling bearing structure for shaft member, still seted up the bar groove on the inner wall of inner circle, bar groove length extends along the inner circle axial, and bar groove front end extends to taper hole department, and bar groove rear end extends to inner circle rear end face. When the oil blanket became invalid the back, the water that gets into gathers by the taper hole and discharges through the bar groove, effectively avoids water to pile up in crankshaft channel department, further avoids water to get into ball department, further increase of service life.

In foretell rolling bearing structure for axle piece, the bar groove has a plurality ofly and along inner circle circumference equipartition to accelerate drainage speed, further improve water-proof effects.

In the rolling bearing structure for the shaft part, the cross section of the strip-shaped groove is arc-shaped, so that the self strength of the inner ring can be enhanced on the premise of ensuring the drainage speed, and the purpose of prolonging the service life of the bearing is stably realized.

In the rolling bearing structure for the shaft element, the inner wall of the conical hole is connected with the inner wall of the annular groove through the annular surface, and the axial section of the annular surface is arc-shaped, so that the flow guide effect is realized, the entering water has the tendency of entering the conical hole backwards, and the drainage speed is further improved.

In the rolling bearing structure for a shaft member described above, the width of the meandering passage was 0.25 mm.

Compared with the prior art, the rolling bearing structure for the shaft has the following advantages:

1. the convex ring blocks the gap between the inner ring and the outer ring for placing the ball, so that water can only enter the gap through the shaft part, meanwhile, the annular groove and the rear convex part are matched to form a tortuous passage with extremely small width, the tortuous passage and the oil seal are axially distributed, the sealing path is effectively prolonged, the difficulty of breaking through the sealing path by water flow is increased, and the waterproof effect is extremely good so as to prolong the service life.

2. When the oil blanket became invalid the back, the water that gets into gathers by the taper hole and discharges through the bar groove, effectively avoids water to pile up in crankshaft channel department, further avoids water to get into ball department, further increase of service life.

Drawings

Fig. 1 is a schematic sectional view of a rolling bearing structure for a shaft member.

Fig. 2 is an enlarged schematic view of a structure at a in fig. 1.

Fig. 3 is a schematic sectional view of the inner ring.

In the figure, 1, outer ring; 1a, a convex ring; 1b, a front convex part; 1c, a rear convex part; 1d, convex strips; 2. an inner ring; 2a, an annular groove; 2b, taper holes; 2c, a strip-shaped groove; 2d, an annular surface; 3. a ball bearing; 4. a holder; 5. a shaft member; 6. oil sealing; 7. a tortuous path.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1, the rolling bearing structure for a shaft member includes an outer ring 1, an inner ring 2, a ring of balls 3 provided between the inner ring 2 and the outer ring 1, and a cage 4 for retaining the balls 3. The shaft piece 5 is in interference fit with the inner ring 2 and used for supporting and positioning the shaft piece 5; the structure and mounting of the balls 3 and the cage 4 are identical to those of conventional bearings, and are not described in detail herein.

In particular, the present invention relates to a method for producing,

the axial length of the outer ring 1 is larger than that of the inner ring 2, in an actual product, the rear end face of the outer ring 1 is flush with the rear end face of the inner ring 2, and the front end of the outer ring 1 extends out by a certain length. As shown in fig. 1, the inner side wall of the front end of the outer ring 1 is provided with a convex ring 1a, the convex ring 1a and the outer ring 1 are of an integrated structure, the convex ring 1a and the outer ring 1 are coaxially arranged, and the convex ring 1a is sleeved outside the shaft 5. The convex ring 1a is not contacted with the inner ring 2, a front convex part 1b and a rear convex part 1c are respectively and integrally formed on the front end surface and the rear end surface of the convex ring 1a, the front convex part 1b and the rear convex part 1c are both annular, the front convex part 1b, the rear convex part 1c and the convex ring 1a are coaxially arranged, and at the moment, the front convex part 1b and the rear convex part 1c are both sleeved outside the shaft piece 5.

Wherein the content of the first and second substances,

preceding convex part 1b passes through to form sealedly between oil blanket 6 and the 5 outer walls of axle, in this embodiment, is equipped with the annular positioning groove that is used for placing oil blanket 6 on the preceding convex part 1b inside wall, and 6 inside walls of oil blanket offset with 5 lateral walls of axle, form better sealedly.

As shown in fig. 1, 2 and 3, an annular groove 2a is provided on the front end surface of the inner ring 2 to face the rear projection 1c, and the annular groove 2a is coaxial with the inner ring 2. The rear end of the rear convex part 1c is inserted into the annular groove 2a, the groove width of the annular groove 2a is larger than the thickness of the rear convex part 1c, at the moment, the annular groove 2a and the rear convex part 1c are in clearance fit to form a bent channel 7, and the width of the bent channel 7 is 0.05-0.35 mm. Preferably the width of the tortuous passage 7 is 0.25 mm. The annular groove 2a and the back convex part 1c are matched to form a winding channel 7 with extremely small width, the winding channel 7 and the oil seal 6 are axially distributed, a sealing path is effectively prolonged, the difficulty of breaking through the sealing path by water flow is increased, and the waterproof sealing device has a very good waterproof effect and prolongs the service life.

Further, a convex strip 1d is integrally formed on the rear end face of the convex ring 1a, the convex strip 1d is located between the convex ring 1a and the inner ring 2, and the length of the convex strip 1d extends along the radial direction of the convex ring 1 a. At least two convex strips 1d are uniformly distributed along the circumferential direction of the outer ring 1. Convex part 1c after the extension of 1d one end of sand grip, on the convex part 1d other end extends to 1 inner wall of outer lane to strengthen convex part 1c and 1 intensity in outer lane simultaneously, improve structural stability and intensity.

As shown in fig. 2 and 3, the inner hole at the front end of the inner ring 2 is a tapered hole 2b with a diameter gradually decreasing from front to back, and the inner wall of the tapered hole 2b extends to the front end face of the inner ring 2. Still seted up bar groove 2c on the inner wall of inner circle 2, bar groove 2c length extends along 2 axial of inner circle, and bar groove 2c front end extends to taper hole 2b department, and bar groove 2c rear end extends to 2 rear end faces of inner circle. When the oil blanket 6 back that became invalid, the water that gets into is gathered by taper hole 2b and is discharged through bar groove 2c, effectively avoids water to pile up in crankshaft channel department, further avoids water to get into 3 departments of ball, further increase of service life. The preferential strip-shaped grooves 2c are multiple and uniformly distributed along the circumferential direction of the inner ring 2, the cross sections of the strip-shaped grooves 2c are arc-shaped, the self strength of the inner ring 2 can be enhanced on the premise of ensuring the drainage speed, and the purpose of prolonging the service life of the bearing is stably realized.

Further, the inner wall of the conical hole 2b is connected with the inner wall of the annular groove 2a through an annular surface 2d, and the axial section of the annular surface 2d is arc-shaped, so that the flow guiding effect is realized, the entering water has the tendency of entering the conical hole 2b backwards, and the drainage speed is further improved.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims (9)

1. A rolling bearing structure for a shaft part comprises an outer ring (1) and an inner ring (2) in interference fit with the shaft part (5), and is characterized in that the inner side wall of the front end of the outer ring (1) is provided with a convex ring (1a), the front end surface and the rear end surface of the convex ring (1a) are respectively and integrally formed with a front convex part (1b) and a rear convex part (1c), the front convex part (1b) and the rear convex part (1c) are annular, and the front convex part (1b), the rear convex part (1c), the convex ring (1a) and the outer ring (1) are coaxially arranged; preceding convex part (1b) forms sealedly through forming between oil blanket (6) and axle spare (5) outer wall, is equipped with on inner circle (2) the preceding terminal surface and supplies back convex part (1c) male ring channel (2a), and ring channel (2a) groove width is greater than back convex part (1c) thickness, and ring channel (2a) and back convex part (1c) clearance fit are in order to form tortuous passageway (7), and the width of tortuous passageway (7) is 0.05 ~ 0.35 mm.

2. A rolling bearing structure for shaft member according to claim 1, wherein the protruding ring (1a) is further integrally formed with a protruding strip (1d) at a rear end face thereof, the length of the protruding strip (1d) extends along the radial direction of the protruding ring (1a), and one end of the protruding strip (1d) extends to the rear protrusion (1 c).

3. A rolling bearing structure for shaft member according to claim 2, wherein the convex strips (1d) are at least two and are uniformly arranged in the circumferential direction of the outer ring (1).

4. A rolling bearing structure for shaft member according to claim 1, wherein the inner bore of the front end of the inner ring (2) is a tapered bore (2b) having a diameter gradually decreasing from front to back, and the inner wall of the tapered bore (2b) extends to the front end face of the inner ring (2).

5. A rolling bearing structure for shaft members according to claim 4, wherein the inner wall of the inner ring (2) is further provided with a strip-shaped groove (2c), the length of the strip-shaped groove (2c) extends along the axial direction of the inner ring (2), the front end of the strip-shaped groove (2c) extends to the position of the taper hole (2b), and the rear end of the strip-shaped groove (2c) extends to the rear end face of the inner ring (2).

6. A rolling bearing structure for shaft member according to claim 5, wherein the strip-shaped groove (2c) is plural and is uniformly distributed along the circumferential direction of the inner ring (2).

7. A rolling bearing construction for shaft members according to claim 5 or 6, characterized in that the cross section of the strip-shaped groove (2c) is circular arc-shaped.

8. A rolling bearing structure for shaft member according to claim 5 or 6, wherein the inner wall of the tapered hole (2b) is connected to the inner wall of the annular groove (2a) through an annular surface (2d), and the annular surface (2d) has a circular arc shape in axial section.

9. A rolling bearing construction for shaft members according to claim 1, characterized in that the width of the meandering channel (7) is 0.25 mm.

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