CN208252604U - The three-layer sealed bearing of hexagonal hole - Google Patents

Abstract

The utility model relates to a kind of three-layer sealed bearings of hexagonal hole, including bearing outer ring, bearing inner race, bearing retainer and bearing steel ball by bearing retainer Matching installation between bearing outer ring and bearing inner race, twice bearing sealed ring is also installed by bearing sealed ring skeleton track between the bearing outer ring and bearing inner race, and twice bearing sealed ring is symmetricly set on the two sides of bearing steel ball, the inner hole of the bearing inner race is the identical hexagonal hole in six sides.The three-layer sealed bearing of the hexagonal hole uses six side's inner hole structures, transition fit is used with rotary shaft, it is easy for installation, it is safe and reliable, it ensure that coaxial precision, solve other locking modes and early failure phenomena occur, the special designing of three lip seal circles, the problem of being not in sealing ring and bearing outer ring relative motion, good seal performance, the service life is longer.

Description

The three-layer sealed bearing of hexagonal hole

Technical field:

The utility model relates to bearing with spherical outside surface technical field more particularly to a kind of three-layer sealed bearings of hexagonal hole.

Background technique:

Bearing with spherical outside surface is mainly used on the heavy equipments such as agricultural machinery, mining machinery, and use environment is more severe, bearing It not only to bear outside very big load, still suffer from biggish impact force, traditional circular hole jackscrew locking mode cannot adapt to There is relative motion using jackscrew premature failure, rotary shaft and bearing inner race in equipment, otherwise will occur in this.If by traditional Circular hole be changed to square hole mounting means just and can solve this problem, such as the Patent No. CN204805323U that our company applies Square hole band silk top bearing with spherical outside surface, but square hole will appear difficult processing in process, and the precision of inner hole is unstable etc. Problem.

Utility model content:

The purpose of this utility model is in view of the drawbacks of the prior art, to provide a kind of easy to process, sealing performance of installation more The three-layer sealed bearing of the hexagonal hole excellent, the service life is longer.

The utility model is achieved by the following technical solution: a kind of three-layer sealed bearing of hexagonal hole, including outside bearing Circle, bearing inner race, bearing retainer and the bearing by bearing retainer Matching installation between bearing outer ring and bearing inner race Steel ball also installs twice bearing sealed ring by bearing sealed ring skeleton track between the bearing outer ring and bearing inner race, And twice bearing sealed ring is symmetricly set on the two sides of bearing steel ball, the inner hole of the bearing inner race is identical six side in six sides Hole.

Preferably, each edge of the hexagonal hole includes three sections of segmental arcs, and pass through circular arc mistake between each segmental arc Degree.

In order to improve leakproofness, the twice bearing sealed ring is all made of three lip seal circles, each bearing seal The outer wall of three lips and bearing inner race in circle forms labyrinth seal structure.

After a longer time of use due to bearing, sealing ring is easy to deform, and therefore, the utility model is to three lips Mouth has carried out ingenious improvement, and three lips in each bearing sealed ring are parallel, and three lips are inclined outwardly, in bearing Ring outer wall forms angle, and relative to the sealing ring for being vertically set on bearing inner race outer wall, the sealing ring being obliquely installed is by external force It is not susceptible to be displaced when effect.

Three lips are broken in order to prevent, and each bearing sealed ring has not to be connect with bearing seal ring framework The flexible seal portion of touching, the flexible seal portion are Chong Die with the junction of three lips.

In order to guarantee the stability of bearing seal ring framework, the bearing outer ring inner wall is offered for being clamped bearing seal The groove of ring framework.

The beneficial effects of the utility model are: the three-layer sealed bearing of the hexagonal hole uses six side's inner hole structures, with rotary shaft It is easy for installation using transition fit, it is safe and reliable, it ensure that coaxial precision, solve other locking modes and early stage mistake occur Phenomenon is imitated, the special designing of three lip seal circles is not in the problem of sealing ring is with bearing outer ring relative motion, sealing performance Good, the service life is longer.

Detailed description of the invention

Fig. 1 is the cross-sectional view of the three-layer sealed bearing of hexagonal hole of the utility model；

Fig. 2 is the main view of the three-layer sealed bearing of hexagonal hole of the utility model；

Fig. 3 is the structural schematic diagram of three lip seal circles of the three-layer sealed bearing of hexagonal hole of the utility model；

In figure: 1. bearing outer rings, 2. bearing inner races, 3. bearing steel balls, 4. bearing retainers, 5. bearing sealed rings, 51. lips Mouthful, 6. hexagonal holes, 7. bearing seal ring frameworks.

Specific embodiment:

The preferred embodiment of the utility model is described in detail with reference to the accompanying drawing, so that the advantages of the utility model It can be easier to be understood by those skilled in the art with feature, to make apparent specific boundary to the protection scope of the utility model It is fixed.Direction term that the utility model is previously mentioned, such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom" etc., It is only the direction with reference to annexed drawings.Therefore, the direction term used be to illustrate and understand the utility model, rather than to Limit the utility model.

As shown in Figure 1 and Figure 2, the three-layer sealed bearing of a kind of hexagonal hole, including bearing outer ring 1, bearing inner race 2, bearing are kept Frame 4 and bearing steel ball 3 by 4 Matching installation of bearing retainer between bearing outer ring 1 and bearing inner race 2, the bearing Also by 7 Matching installation twice bearing sealed ring 5 of bearing seal ring framework between outer ring 1 and bearing inner race 2, and twice bearing is close Seal 5 is symmetricly set on the two sides of bearing steel ball 3, and 1 inner wall of bearing outer ring is offered for being clamped bearing seal ring framework 7 Groove, the inner hole of the bearing inner race 2 is the identical hexagonal hole in six sides.

The each edge of the hexagonal hole 6 includes three sections of segmental arcs, and excessive by circular arc between each segmental arc, three sections of arcs The length of the segmental arc of the left and right ends of shape section is identical, and the length of the medial arc section of three sections of segmental arcs is greater than both ends segmental arc Length, the hexagonal hole 6 are generally the regular hexagon of multistage arc in each side.The inner hole of bearing inner race 2 carries out before heat treatment Mill processing, then makees origin reference location with inner ring outer diameter, processes inner hole using six hole formed punches, such hexagonal hole 6 with outside bearing inner race 2 The coaxial precision holes of diameter.

As shown in figure 3, the twice bearing sealed ring 5 is all made of three lip seal circles, in each bearing sealed ring 5 Three lips 51 and bearing inner race 2 outer wall formed labyrinth seal structure.Three lips 51 in each bearing sealed ring 5 It is parallel, and three lips 51 be inclined outwardly (i.e. left side bearing sealed ring 5 be tilted to the right, the bearing sealed ring 5 on right side is to the left Inclination), angle, which is formed, with 2 outer wall of bearing inner race is obliquely installed relative to the sealing ring for being vertically set on bearing inner race outer wall It is not susceptible to be displaced when sealing ring is by external force.Each bearing sealed ring 5 has with bearing seal ring framework 7 not The flexible seal portion of contact, the flexible seal portion are Chong Die with the junction of three lips 51.

Compared with prior art, the three-layer sealed bearing of the hexagonal hole uses six side's inner hole structures, uses transition with rotary shaft Cooperation, it is easy for installation, it is safe and reliable, it ensure that coaxial precision, solve other locking modes and early failure phenomena occur, three The problem of special designing of lip seal circle is not in sealing ring and bearing outer ring relative motion, good seal performance uses the longevity It orders longer.

Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed, But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to The protection scope of the utility model.

Claims (6)

1. a kind of three-layer sealed bearing of hexagonal hole, including bearing outer ring, bearing inner race, bearing retainer and pass through bearing retainer Bearing steel ball of the Matching installation between bearing outer ring and bearing inner race, also passes through between the bearing outer ring and bearing inner race Bearing sealed ring skeleton track installs twice bearing sealed ring, and twice bearing sealed ring is symmetricly set on the two of bearing steel ball Side, it is characterised in that: the inner hole of the bearing inner race is the identical hexagonal hole in six sides.

2. the three-layer sealed bearing of hexagonal hole according to claim 1, it is characterised in that: each edge of the hexagonal hole is wrapped Three sections of segmental arcs are included, and excessive by circular arc between each segmental arc.

3. the three-layer sealed bearing of hexagonal hole according to claim 1 or 2, it is characterised in that: the twice bearing sealed ring Three lip seal circles are all made of, it is close that the outer wall of three lips and bearing inner race in each bearing sealed ring forms labyrinth type Seal structure.

4. the three-layer sealed bearing of hexagonal hole according to claim 3, it is characterised in that: in each bearing sealed ring Three lips are parallel, and three lips are inclined outwardly, and form angle with bearing inner race outer wall.

5. the three-layer sealed bearing of hexagonal hole according to claim 4, it is characterised in that: each bearing sealed ring tool Have and the discontiguous flexible seal portion of bearing seal ring framework, the junction weight of the flexible seal portion and three lips It is folded.

6. the three-layer sealed bearing of hexagonal hole according to claim 1, it is characterised in that: the bearing outer ring inner wall offers For being clamped the groove of bearing seal ring framework.