CN100588850C

CN100588850C - Bearing device comprising bearing sheath and a sealed assembly

Info

Publication number: CN100588850C
Application number: CN200610073885A
Authority: CN
Inventors: B·鲍尔; H·格鲍尔
Original assignee: SKF AB
Current assignee: SKF AB
Priority date: 2005-04-07
Filing date: 2006-04-06
Publication date: 2010-02-10
Anticipated expiration: 2026-04-06
Also published as: CN1844687A; DE102005016215A1

Abstract

The invention relates to a bearing, which comprises a bearing sleeve (2) rotationally support the bearing and one sealing element (8) for sealing one space between the bearing sleeve and the bearing neck (1) at the first axial end of bearing sleeve (2), wherein said bearing has one molding part (18) with the first and second molding elements (19, 20); the second molding element is remote from thefirst end (3) of bearing sleeve, and axially arranged beside the first molding element; inside the second molding element (20), the axial component of plane normal line is larger than the one of firstmolding element; the sealing element has the first sealing ring (9) sealed and connected to the bearing neck (1); the first sealing ring has the first sealing lip (15), contacting the first molding element. And the first sealing ring has the second sealing lip (16), contacting the second molding element (20) of bearing sleeve (2).

Description

The bearing means that comprises a bearing housing and a black box

Technical field

The present invention relates to a kind of bearing means that comprises a bearing housing and a black box.The invention still further relates to a kind of black box and a kind of swivel that is used for this bearing means with a plurality of this bearing meanss.

Background technique

The bearing means that comprises a bearing housing and a black box can be applied in the universal joint especially.In order to ensure the lasting Functional Capability of universal joint, essential is, reliably the gap that always exists between the axle journal of bearing housing and rotatable supporting therein of sealing configuration decision.Here the black box that always adopts should stop the oiling agent that outflow keeps on the one hand and gets rid of on the other hand or reduce dirt at least from invading the inside of bearing housing on every side on acceptable degree in bearing housing.This bearing means at universal joint then is a particular importance when always being provided with permanent lubricating, and it must guarantee sufficient lubrication in the life time of whole regulation.

The black box that is used for bearing means is known various forms of implementation.For example DE 975575C discloses a kind of Sealing that is used for needle bearing especially for the needle bearing of universal joint.In these needle bearings, the end that outer race always constitutes a lid and a link arm always is used as inner race.Sealing constitutes rubber seal and has a main flange, and its end is shaped as it is embedded in the support slot, and this support slot is arranged on the outer surface of outer race for this reason.Rubber seal is sleeved on the circumference of link arm with little tension force.

By the known a kind of particularly black box of the bearing neck of universal joint that is used for of DE 1400988A.A bearing race is set on bearing neck, wherein between bearing neck and bearing race, embeds many bearing needles.The sealing assembly comprises the element of a body and the supporting member of a flexibility.The element of body has three sealing lips, and one of them sealing lip embeds in the groove that constitutes on the circumference of bearing race, and sealing lip abuts on the end face of bearing race and a sealing lip contacts with a shaft shoulder of bearing neck.

By DE 4128179A1 knownly a kind ofly be used for bearing housing, especially for the Sealing of universal joint.In bearing housing, always support an axle journal.The sealing part has the seal ring of an inside, and it is arranged in the hole of bearing housing and the seal ring of an outside, is arranged on the axle journal.The seal ring of outside has a sealing lip, and it abuts on the external peripheral surface of bearing housing.

Though utilize known black box can reach partially well sealing, the further improvement under extreme conditions application sealing characteristics is satisfactory especially.Like this, for example may take place under the situation of using high-pressure wash, one water jet under high pressure impacts in the zone of a sealing lip.According to the parameter of the structural details of Sealing and the water jet parameter of pressure and the angle of shock particularly, have danger, promptly sealing lip is by jack-up and therefore in the water intrusion bearing housing.The water of invading can produce adverse influence very and particularly reduce the lubrication of the oiling agent of keeping in the bearing housing.Therefore the working life that can reduce bearing means according to the degree of oiling agent infringement.

About because of one high pressure water jet or similarly the leakage that causes of effect is injured especially is the sealing lip that abuts on the outside of bearing housing, because the setting of sealing lip relatively exposes to the open air.Though can reduce the danger of leaking by improving impacting force in principle, sealing lip is pressed onto on the outside of bearing housing with this impacting force.But higher impacting force also produces the consequence of the stronger wearing and tearing and the bigger friction of sealing lip, thereby also has a kind of very limited move place in this respect.

Summary of the invention

Therefore the objective of the invention is to, provide a kind of very reliable black box, even it also can stop foreign matter to invade the inside of bearing housing under extreme condition in order to the gap between the axle journal that is sealed in a bearing housing and a rotatable supporting in bearing housing.

According to the present invention, a kind of bearing means is proposed, comprise that a bearing housing that is used for a rotatably mounted axle journal and one are used for sealing the black box in a gap between bearing housing and axle journal in the zone of one first axial end of bearing housing, its centre bearer bush have one on its outside around the forming part that comprises one first moulding section and one second moulding section, second moulding section is big in first moulding section in the second moulding section internal ratio to the axial component of next door that is arranged on first moulding section and plane vertical line away from the first axial end earth's axis of bearing housing more; Black box has one first seal ring, and this first seal ring is salable and anti-be connected with axle journal with changeing, and first seal ring has one first sealing lip, and this first sealing lip abuts on first moulding section of bearing housing; It is characterized in that first seal ring has one second sealing lip, this second sealing lip abuts on second moulding section of bearing housing.

Bearing means of the present invention has a bearing housing that is used for a rotatably mounted axle journal and one are used for sealing a gap between bearing housing and axle journal in the zone of one first axial end of bearing housing black box.Bearing housing have one its outside on around the forming part that comprises one first moulding section and one second moulding section.Second moulding section more away from the first axial end earth's axis of bearing housing to the next door that is arranged on first moulding section.In second moulding section, the plane vertical line ( ) axial component greater than in first moulding section.Black box has one first seal ring, and its salable and anti-commentaries on classics ground is connected with axle journal.First seal ring has one first sealing lip, and it abuts on first moulding section of bearing housing.Black box of the present invention is characterised in that first seal ring has one second sealing lip, and it abuts on second moulding section of bearing housing.

Advantage of the present invention is that bearing housing prevents foreign matter intrusion and loss of lubricant lastingly and reliably by means of black box under the state of assembling.Wherein particularly advantageous is even affacting under the pressure under the situation of the liquid on the bearing means from the outside, for example also to keep seal action in by means of the cleaning process of a high pressure purification plant.Might provide oiling agent to fill with for bearing means is disposable whereby, be enough its whole working life for bearing means.The maintenance afterwards of bearing means is unnecessary.Danger also was very little even under extreme conditions lose efficacy in this case.

In first moulding section of bearing housing and the axial region between first axial end, can constitute a radially bump.This radially bump be fixed on the bearing housing with black box can being prevented to lose: use thereby bearing means of the present invention can be used as a unit.

First sealing lip of first seal ring preferably has the orientation of an Off-Radial direction.This especially under the situation of strong load the wearing character to first sealing lip produce favorable influence.

Second sealing lip of first seal ring is outwards directed with respect to the radial direction preferred angled.This causes and makes second sealing lip also therefore improve seal action on second moulding section of pressing to bearing housing under the pressure effect of face more strongly.A kind of in addition liquid that impacts under pressure is led away from the seal point that is formed by second sealing lip.

Can set in addition, first sealing lip of first seal ring mechanically constitutes more stable than second sealing lip, thereby at first makes the distortion of second sealing lip under the effect outside.In the advantage aspect the working life of effective manufacturing and length is that first and second sealing lips are constituent elements of the integral body of first seal ring.

In a preferred embodiment of bearing means of the present invention, first seal ring in the zone of first and second sealing lips, have one outside around groove.The special formation of this groove enlarges its radially outward.Thereby a kind of impacting force that helps seal action distributes and also reaches high sealing under these circumstances because of a kind of liquid that impacts under pressure produces by means of this groove.

In order still further to improve seal action, bearing means of the present invention can constitute on the end face of first axial end that makes first seal ring abut in a formation bearing housing.

First seal ring can have a support ring, and it improves shape stability.Preferred supporting ring has a S shape cross section basically.First seal ring is configured for being arranged on the cone-shaped section of axle journal especially.

In order also further to improve seal action, black box can have one second seal ring, and it axially is arranged on the side towards bearing housing inside on the next door of first seal ring.Second seal ring can seal and resist and be connected in bearing housing with changeing.Preferred second seal ring has a support ring and prevents to move axially by means of support ring.An axial fixing advantage that constitutes like this is that it can bear big power.

The invention still further relates to a kind of black box is used in the zone of first axial end of bearing housing seal shaft bearing sleeve and rotatably is arranged at gap between the axle journal in the bearing housing.This black box of the present invention has one first seal ring, is connected in to its salable and anti-commentaries on classics axle journal.First seal ring has an axial extension that comprises first sealing lip in the zone of its excircle, the sealing lip extends internally about radial direction.This black box of the present invention is characterised in that, constitutes second sealing lip in the free-ended zone of the axial extension of first seal ring, and it stretches out about inclined.

In addition, the present invention relates to a kind of swivel, it has a plurality of bearing meanss that constitute according to the present invention, rotatably respectively supports an axle journal therein.Swivel of the present invention constitutes a universal joint especially, and a plurality of therein axle journal across interconnect.

Description of drawings

Below illustrate in greater detail the present invention by the figure shown in the accompanying drawing.Wherein:

One of Fig. 1 comprises the sectional view according to an embodiment's of the bearing means of the present invention's formation universal joint;

The cut-away section of the amplification of Fig. 2 Fig. 1 in the zone of black box; And

The cut-away section of the amplification of Fig. 3 Fig. 2 is in order to the details of explanation black box.

Embodiment

Fig. 1 illustrates the sectional view of an embodiment's who comprises the bearing means that constitutes according to the present invention universal joint.Wherein whole universal joints is not shown and the zone of an axle journal 1 only is shown, this axle journal 1 can be rotated to support in the bearing housing 2 and is inserted into the inside of bearing housing 2 for this reason from the direction of one first axial end 3 of bearing housing 2.Some columniform rolling elements 4 are set between axle journal 1 and bearing housing 2, and they are lubricated by a kind of not oiling agent shown in the diagram.Axially mountings to one are on the thrust disk 5 on the bottom surface of bearing housing 2 respectively for axle journal 1 and rolling element 4, and this bottom surface is formed on one second axial end 6 of bearing housing 2.In the zone of first axial end 3, between axle journal 1 and bearing housing 2, have the gap 7 of an annular, it is by black box 8 sealings that constitute according to the present invention.The structure of black box 8 and functional mode are illustrated by Fig. 2 and 3.

Fig. 2 illustrates the cut-away section of the amplification of Fig. 1 in the zone of black box 8.Fig. 3 illustrate once more Fig. 2 amplification cut-away section in order to the explanation black box 8 details.Black box 8 has the seal ring 9 of an outside and the seal ring 10 of an inside, and they axially are set up in parallel.Wherein Wai Mian seal ring 9 is arranged on the outside of bearing housing 2 and inner seal ring 10 is arranged within the bearing housing 2 in the zone of first axial end 3 of bearing housing 2.The seal ring 9 of outside has a seal 11 and a support ring 12, and its major part is arranged within the seal 11.The seal 11 of the seal ring 9 of outside is preferably by fluorine rubber (Viton) or a kind of other elastomeric material manufacturing.The support ring 12 of the seal ring 9 of outside is by metal manufacturing and cross section with S shape.

The seal 11 of the seal ring 9 of outside have within it that two forming V-shapes are provided with in the zone of circumference respectively with the leg 13 of tip ending, the seal ring of outside borrows it to be bearing on the cone-shaped section 14 of axle journal 1.The seal ring 9 of outside resists commentaries on classics and is installed on the axle journal 1 hermetically in such a way.

The seal ring 9 of outside to respect to the rotatable bearing housings of the seal ring 9 of outside 2 over there at a plurality of dot encapsulations.Wai Mian seal ring 9 has a sealing lip 15 and a sealing lip 16 for this reason, they be the axial extension that constitutes in outside the zone of excircle of seal ring 9 constituent element and with 11 one-tenths monomers formations of seal of the seal ring 9 of outside.Sealing lip 15 extends internally about radial direction, and it is provided with near first axial end 3 of bearing housing 2 and mechanically constituent ratio sealing lip 16 is more stable.But preferred sealing lip 15 accurately is not parallel to the radial direction orientation, but with its at angle.Sealing lip 16 is formed on the free end of axial extension of seal ring 9 of outside and is outwards directed about inclined.Preferred this is oriented in and is chosen to make it nearer from radial direction from the axial direction ratio here.In the zone that constitutes two

sealing lips

15 and 16, the seal 11 of the seal ring 9 of outside have one on its excircle around groove 17, it has the cross section of V-arrangement in an illustrated embodiment.

Two sealing lips 15 of the seal ring 9 of outside and 16 are abutting on the bearing housing 2 in the zone of a radial groove that constitutes on the excircle of bearing housing 2 18 respectively.Radial groove 18 has the cross section of rectangle in an illustrated embodiment, and it is limited by a bottom surface 19, a first side wall 20 and one second sidewall 21.Bottom surface 19 and the transition region between

sidewall

20 and 21 at radial groove 18 are respectively fillets.The first side wall 20 be arranged on bottom surface 19 away from a side of first axial end 3 of bearing housing 2 and have than the 21 remarkable bigger radially extensions of second sidewall, second sidewall is arranged on the side towards first axial end 3 of bearing housing 2 of bottom surface 19.Second sidewall 21 by one radially bump 22 constitute, it is axially disposed between first axial end 3 of the bottom surface 19 of radial groove 18 and bearing housing 2.When axle journal 1 does not insert in the bearing housing 2, prevent to be fixed on the bearing housing 2 by means of the seal ring 9 of bump 22 outsides radially with losing.Bearing housing 2 and black box 8 might be used as a unit whereby.

The sealing lip 15 of the seal ring 9 of outside abuts on the bottom surface 19 of radial groove 18.The sealing lip 16 of the seal ring 9 of outside abuts on the first side wall 20 of radial groove 18.Reach high seal action whereby, guarantee even this under high pressure also remains when the zone of sealing is impacted at for example water or other liquid.The inside that sealing lip 16 on the first side wall that abuts in radial groove 18 20 of the seal ring 9 of outside can stop water intrusion bearing housing 2 effectively.The geometrical shape of the selection of the seal 11 of the seal ring 9 of the outside particularly result of groove 17 generations is that sealing lip 16 and sealing lip 15 are still pressed to the first side wall 20 or the bottom surface 19 of radial groove 18 more strongly because of hydraulic pressure.Stop impact

sealing lip

15 and 16 because of water by jack-up and reach a high seal action whereby.The water jet of partly protecting sealing lip 16 to avoid impacting by the sidewall 20 of radially-protruding radial groove 18 in addition.When not having hydraulic action, sealing

lip

15 and 16 are pressed to the first side wall 20 of radial groove 18 or bottom surface 19 and only are subjected to a kind of small friction and a kind of small wearing and tearing with predetermined bias voltage.Just think that because the outside time spent of doing needs a seal action that improves the effect by just should the outside improves the impacting force of sealing lip 15 and 16.Especially such make the friction and wear that the time spent can keep sealing

lip

15 and 16 in such a way and be small and still guarantee reliable sealing only occurring occasionally.

In the embodiment shown in Fig. 2 and 3, the bottom surface 19 of radial groove 18 constitutes a radial surface, and two

sidewalls

20 and 21 constitute an axial surface respectively.In order to seal bottom surface 19 and the first side wall 20 that only needs radial groove 18, thus also can cancel second sidewall 21 and therefore radial groove 18 can turn to a step.

Other change may be as follows, and the sealing lip 15 of the seal ring 9 of outside not necessarily must abut on the radial surface, and sealing lip 16 not necessarily must abut on the axial surface.But for best sealing under these conditions essential be that for the surface that sealing lip 16 is reclined, the axial component of plane vertical line is greater than the surface that is reclined for sealing lip 15.In other words these surfaces constitute like this, produce a kind of stronger tangible radial seal even produce a kind of stronger tangible axial seal in sealing lip 16 than in sealing lip 15 in sealing lip 15 than in sealing lip 16.

Two sealing lips 15 of the seal ring 9 of outside and 16 also can abut on the surface with a kind of arc-shaped cross-section.In this case with the average plane vertical line of a contact area basis as above-mentioned consideration.

The reliability of sealing also can further like this improve, and promptly the seal 11 of Wai Mian seal ring 9 axially is adjacent to the end face of first axial end 3 of a formation bearing housing 2.

Even water or other foreign matter enter the zone by seal ring 9 sealings of outside, it can not enter the inside of bearing housing 2, and is stoped by the seal ring 10 of inside.

Inner seal ring 10 has a seal 23 and a support ring 24, and it partly is arranged in the seal 23.Seal 23 is preferably by Viton or a kind of other elastomeric material manufacturing.Support ring 24 is preferably by metal manufacturing and cross section with crooked shape, and wherein a leg also constitutes ladder.Inner seal ring 10 is arranged on to the next door at rolling element 4 with a pitch axis on the inner circumference of bearing housing 2 and anti-ly simultaneously changes and be connected in bearing housing 2 hermetically.This reaches on the one hand like this, that is, the seal 23 of inner seal ring 10 is abutted on the bearing housing 2 with a bias voltage.On the other hand in the groove 25 on the inner circumference that is partially submerged into bearing housing 2 that stretches out in the seal 23 of the seal ring internally 10 of support ring 24.Prevent moving axially of inner seal ring 10 whereby.This is special because the effect of a dish spring 26 is essential, and the latter is axially disposed between the inner seal ring 10 and rolling element 4.Dish spring 26 is axially pressed to thrust disk 5 with rolling element 4 and is bearing in simultaneously on the inner seal ring 10.Because each rolling element 4 clamps in such a way, bearing housing 2 comprises that black box 8 and each rolling element 4 can be used as that a unit uses and as such shifting onto on the axle journal 1.

Constitute a sealing lip 27 on the inner circumference of the seal 23 of the seal ring 10 of inside, it abuts on the cone-shaped section 14 of axle journal 1.By means of one around disc spring 28, it is also referred to as helical spring, sealing lip 27 is pressed to the cone-shaped section 14 of axle journal 1.Near sealing lip 29 of formation sealing lip 27, it has the shape of very long extension and extends over there and abut on its seal 11 with the orientation seal ring 9 to the outside that a radially outward departs from axial direction.

List of numerals

1 axle journal, 16 sealing lips

2 bearing holder (housing, cover)s, 17 grooves

3 first axial end, 18 radial slots

4 rolling elements, 19 bottom surfaces

5 thrust disks, 20 the first side walls

6 second axial end, 21 second sidewalls

7 gaps 22 are bump radially

8 black boies, 23 seals

Seal ring 24 support rings of 9 outsides

Seal ring 25 grooves of 10 inside

11 seals, 26 dish springs

12 support rings, 27 sealing lips

13 legs, 28 disc springs

14 cone-shaped sections, 29 sealing lips

15 sealing lips

Claims

1. bearing means, comprise that a bearing housing (2) that is used for a rotatably mounted axle journal (1) and one are used for sealing the black box (8) in a gap (7) between bearing housing (2) and axle journal (1) in the zone of one first axial end (3) of bearing housing (2), wherein

-bearing housing (2) have one on its outside around the forming part (18) that comprises one first moulding section (19) and one second moulding section (20), second moulding section more away from first axial end (3) earth's axis of bearing housing (2) to the axial component of next door that is arranged on first moulding section (19) and plane vertical line the second moulding section internal ratio in first moulding section (19) greatly;

-black box (8) has one first seal ring (9), and the salable and anti-commentaries on classics of this first seal ring ground is connected with axle journal (1), and

-the first seal ring (9) has one first sealing lip (15), and this first sealing lip abuts on first moulding section (19) of bearing housing (2);

It is characterized in that first seal ring (9) has one second sealing lip (16), this second sealing lip abuts on second moulding section (20) of bearing housing (2).

2. according to the described bearing means of claim 1, it is characterized in that, in first moulding section (19) of bearing housing (2) and the axial region between first axial end (3), constitute a radially bump (22).

3. according to the described bearing means of claim 1, it is characterized in that first sealing lip (15) of first seal ring (9) has the orientation of an Off-Radial direction.

4. according to the described bearing means of claim 3, it is characterized in that second sealing lip (16) of first seal ring (9) is outwards directed with respect to inclined.

5. according to one of claim 1 to 4 described bearing means, it is characterized in that first sealing lip (15) of first seal ring (9) mechanically more stably constitutes than second sealing lip (16).

6. according to one of claim 1 to 4 described bearing means, it is characterized in that first and second sealing lips (15,16) are the constituent elements of the integral body of first seal ring (9).

7. according to one of claim 1 to 4 described bearing means, it is characterized in that, first seal ring (9) in the zone of first and second sealing lips (15,16), have one outside around groove (17).

8. according to the described bearing means of claim 7, it is characterized in that groove (17) radially outward enlarges.

9. according to one of claim 1 to 4 described bearing means, it is characterized in that first seal ring (9) abuts on the end face of first axial end (3) that forms bearing housing (2).

10. according to one of claim 1 to 4 described bearing means, it is characterized in that first seal ring (9) has a support ring (12).

11., it is characterized in that support ring (12) has a cross section of S shape basically according to the described bearing means of claim 10.

12., it is characterized in that first seal ring (9) is configured for being arranged on the cone-shaped section (14) of axle journal (1) according to one of claim 1 to 4 described bearing means.

13. according to one of claim 1 to 4 described bearing means, it is characterized in that, black box (8) has one second seal ring (10), and this second seal ring axially is arranged on a side of the inside of bearing housing (2) on the next door of first seal ring (9).

14., it is characterized in that second seal ring (10) sealing is connected with bearing housing (2) with anti-with changeing according to the described bearing means of claim 13.

15., it is characterized in that second seal ring (10) has a support ring (24) and prevents to move axially by means of support ring (24) according to the described bearing means of claim 14.

16. black box, be used in the zone of one first axial end (3) of bearing housing (2), sealing a gap (7) between bearing housing (2) and axle journal (1) that can be rotatably set in the bearing housing (2), comprise one first seal ring (9), salable and the anti-commentaries on classics of this first seal ring ground is connected with axle journal (1) and has an axial extension that comprises one first sealing lip (15) in the zone of its excircle, and this extension extends internally with respect to radial direction; It is characterized in that constitute one second sealing lip (16) in the free-ended zone of the axial extension of first seal ring (9), this second sealing lip stretches out with respect to inclined.

17. swivel is characterized in that, swivel has a plurality of according to one of claim 1 to 15 described bearing means, rotatably respectively supports an axle journal (1) therein.

18., it is characterized in that swivel constitutes a universal joint according to the described swivel of claim 17, a plurality of therein axle journals (1) across interconnects.