CN207093575U - A kind of combination dust-proof sealing structure for bearing - Google Patents

Abstract

A kind of combination dust-proof sealing structure for bearing, including bearing outer ring, bearing inner race, combine dust-proof sealing structure, the combination dust-proof sealing structure is arranged between the bearing outer ring and bearing inner race, the combination sealing dustproof construction includes dust ring, seal and support metallic framework, the dust ring internal diameter is fixed on the bearing inner race, and the dust ring external diameter coordinates with the seal, the outer rim of the seal is fixed on the bearing outer ring by the support metallic framework, the support metallic framework connects as one with the seal, and one end is provided with sealing lip on the support frame, the sealing lip contacts with dust ring interference.More preferably, and whole combination dust-proof sealing structure is more compact and light for the dust-proof effect and sealing property of the dust ring of the utility model combination dustproof sealing mechanism, while the retardance torque of seal itself is smaller, so as to improve the service life of total.

Description

A kind of combination dust-proof sealing structure for bearing

Technical field

It the utility model is related to a kind of seal, more particularly to a kind of combination dust-proof sealing structure for bearing.

Background technology

Bearing is the important foundation parts of current all kinds of mechanized equipments, and its precision, performance, life and reliability play Conclusive effect.In engineering goods, bearing belongs to high-precision product, the fine or not service life to bearing of bearing seal Conclusive effect is played, the bearing of prior art substantially there can be oil leak in use and external dust easily penetrates into Situation, this will largely effect on the using effect of bearing.

Bearing seal in the market, which can be divided into, carries sealing and additional sealing, and additional sealing is due to needing in view of each Kind factor, it is desirable to which higher, this causes manufacturing cost higher, and additional sealing device structure is more complicated, causes to take Space is larger, not compact enough, influences the portability of whole bearing.Prior art also has the self-packer of many types, but mostly Problems be present：First, the sealing that the dust ring in seal assembly is set mostly is not good enough, dust ring and bearing are shown Outer ring has a bigger gap so that dust and muddy water outside bearing are easier to enter by this gap, influence Its sealing；Second, the seal in seal assembly is provided with multiple seal lips, the setting of this structure is more complicated, takes Space is big, not compact enough, influences the portability of whole seal assembly, can also improve in addition seal and dust ring frictional force and The retardance torque of seal, reduces its service life.

Utility model content

Technical problem to be solved in the utility model is：There is provided it is a kind of can solve the problem that above-mentioned technical problem be used for bearing Combined sealing structure.

The technical scheme in the invention for solving the above technical problem is：A kind of combination dust seal knot for bearing Structure, including bearing outer ring, bearing inner race, combine dust-proof sealing structure, and the combination dust-proof sealing structure is arranged at the bearing Between outer ring and bearing inner race, the combination sealing dustproof construction includes dust ring, seal and support metallic framework, described anti- Konisphere internal diameter is fixed on the bearing inner race, and the dust ring outer ring coordinates with the seal, the seal Outer rim is fixed on the bearing outer ring by the support metallic framework, and the support metallic framework is connected with the seal It is integrated, and described support metallic framework one end is provided with sealing lip, the sealing lip contacts with dust ring interference.

Preferably, the dust ring circle is bent into spill, and the dust ring internal diameter is interference fitted with the bearing inner race.

Preferably, the sealing lip includes sealing outer lip and sealing epipharynx, and the sealing outer lip and the dust ring Internal diameter inwall is interference fitted, and the sealing epipharynx is interference fitted with the dust ring side wall.

Preferably, the internal diameter inwall resilient abutment of the sealing outer lip and the dust ring, and the sealing epipharynx and institute State dust ring side wall also resilient abutment.Play good sealing effectiveness.

Preferably, the external diameter end of described dust ring is bent into a projection, be provided with the seal with it is described convex The groove that block is adapted, and the projection coordinates with the groove gap, forms a seal.Due to reduction largely Space between dust ring and bearing outer ring so that dust ring plays more preferably dustproof effect.

Preferably, the bearing outer ring is set fluted, and the seal outer rim passes through the support metallic framework bullet Property is pressed in the groove.Support metallic framework is used for ensureing the rigidity and sealing of rubber seal.

Preferably, described sealing outer lip, sealing epipharynx and sealing ring cooperatively forms triangle seal groove and polygon is close Sealing groove, and the sealing ring epipharynx forms reverse-hook shape structure with outer lip.Seal groove can be accommodated from the extraneous dust entered of bearing With muddy water and other impurities, once filling up, the receiving space of its seal groove reduces so that extraneous dust and muddy water is more difficult to lead to Sealing lip is crossed so that penetrating into inside, further increases the dust-proof effect and sealing of combination dust-proof sealing structure.

Compared with prior art, the utility model has the advantage of：First, dust ring and bearing are reduced to a greater extent Space between outer ring, further increase the sealing and dust-proof effect of dust ring；Second, seal is provided only with two sealings Lip, structure is simpler and flexible, and part is more compact, further increases the portability of seal；Third, seal with it is dust-proof The frictional force of circle and the retardance torque of seal are smaller, further reduce its loss so as to extend its service life.

Brief description of the drawings

Fig. 1 is the structural representation for the combination dust-proof sealing structure that the utility model is used for bearing.

Fig. 2 is the enlarged diagram at A in Fig. 1.

Description of symbols in figure：1st, bearing outer ring, 2, bearing inner race, 3, dust ring, 4, seal, 5, support metallic framework, 7th, epipharynx is sealed, 8, sealing outer lip, 9, chimb, the 10, first groove, the 11, second groove, 13, triangle seal groove, 14, polygon Shape seal groove.

Embodiment

Embodiment of the present utility model is further described below in conjunction with the accompanying drawings.

Specific embodiment of the utility model as shown in Figure 1-2, a kind of combination dust-proof sealing structure for bearing, including Bearing outer ring 1, bearing inner race 2, combination dust-proof sealing structure, combination dust-proof sealing structure are arranged in bearing outer ring 1 and bearing Between circle 2, in addition, combination sealing dustproof construction includes dust ring 3, seal 4 and support metallic framework 5, the internal diameter quilt of dust ring 3 It is fixed on bearing inner race 2, i.e., the internal diameter of dust ring 3 and bearing inner race 2 are interference fit, and dust ring 3 is using metal material Material, dust ring 3 are the first line of defences for combining dust-proof sealing structure, and the meeting very first time is various different by extraneous dust, muddy water etc. The erosion of thing, so its intensity must be big, on the one hand it be to ensure its normal dust-proof effect, be on the other hand also to improve it to make Use the life-span.

The external diameter of dust ring 3 coordinates with seal 4, and the external diameter end of wherein dust ring 3 is bent into a chimb 9, on seal 4 The first groove 10 being adapted with chimb 9 is provided with, and the gap of 9 and first groove of chimb 10 coordinates, and forms a seal, gap Coordinate and cause the outer ring of dust ring 3 and the sealing of seal 4, while further reduce the outer ring of dust ring 3 and bearing outer ring 1 Between space, further increase the sealing and dust-proof effect of dust ring 3, on the one hand the formation of seal makes dust, water The foreign matters such as mud penetrate into the mouth and can form deposit after accumulating completely, so as to block the seal so that alien material is more difficult to penetrate into and is somebody's turn to do Seal enters bearing, on the other hand causes the sliding contact of 9 and first groove of chimb 10, because bearing needs to allow inner ring and outside Rotating against between circle, so the outer rim of seal 4 is by the sliding contact of the first groove 10, while the internal diameter of dust ring 3 is solid It is scheduled on bearing inner race 2, so just can guarantee that bearing outer ring 1 and inner ring 2 rotate against, runs well.

Wherein on the one hand the design of seal makes the foreign matters such as dust, cement penetrate into the seal and can form accumulation after accumulating completely Thing, so as to block the seal so that alien material is more difficult to penetrate into the seal, limits it and enters Bearing inner, first anti- The design of dirt seal is effectively improved the dust-proof effect of the combination dust-proof sealing structure.

The outer rim of other seal 4 is by supporting metallic framework 5 to be fixed on bearing outer ring 1, and wherein bearing outer ring 1 is set There is the second groove 11, and the outer rim of seal 4, by supporting the elastic compression of metallic framework 5 11 in second groove, support is golden Category skeleton 5 connects as one with seal 4, and support metallic framework 5 can effectively improve the rigidity of whole seal 4, ensure close Sealing 4 is stably connected with bearing outer ring 1, prevents it from coming off, while seal 4 uses nitrile rubber, using the material, can be made Seal 4 has wearability higher and the preferable characteristic of heat resistance, so as to improve the adaptation energy of whole combination dust-proof sealing structure Power, further improve its service life.

One end is provided with sealing lip on support metallic framework 5, and sealing lip contacts with the interference of dust ring 3.Wherein sealing lip bag Include sealing outer lip 8 and sealing epipharynx 7, and the inner ring inwall for sealing outer lip 8 and dust ring 3 is interference fitted, sealing epipharynx 7 with it is dust-proof 3 side walls interference fit, the internal diameter inwall resilient abutment of sealing outer lip 8 and dust ring 3 are enclosed, and seals epipharynx 7 and the side wall of dust ring 3 Also resilient abutment.Wherein sealing lip is also to use nitrile rubber, and its elastic performance is preferable, and sealing lip on the one hand can be ensured with preventing It the stability being interference fitted between the 3 of konisphere, should not easily slide, improve its sealing；It is close made of another aspect nitrile rubber It is preferable to seal anti-wear performance and the heat resistance of lip, its service life can be improved.Seal outer lip 8, sealing epipharynx 7 and dust ring 3 Triangle seal groove 13 and polygon seal groove 14 are cooperatively formed, seal groove can be accommodated from the extraneous dust and mud entered of bearing Water and other impurities, once filling up, the receiving space of its seal groove can be smaller so that extraneous dust and muddy water is more difficult to pass through Sealing lip further increases combination dust seal so that penetrating into inside, while cause the grease of Bearing inner to be more difficult to ooze out again The dust-proof effect and sealing of structure.And sealing ring epipharynx 7 forms reverse-hook shape structure with outer lip 8, barb-shaped structure can reduce The frictional force and the retardance torque of itself between outer lip and dust ring inner ring are sealed, reduces the damage that each part is brought because of friction Consumption, so as to improve its service life.

The combination dust-proof sealing structure that the utility model is used for bearing has the beneficial effect that：First, further increase dust-proof Enclose 3 sealings and dust-proof effect of itself；Second, entirely all parts connection of combination dust-proof sealing structure is more compact, take Space is small, and layout is more reasonable, and total is lighter；Third, the design and sealing lip of two sealing lip overhead kick shapes and anti- Multiple seal grooves that konisphere 3 is formed not only make its sealing and dust-proof effect more preferably, and improve the durability of sealing lip, enter one Step improves the service life of whole dust-proof sealing structure.

Only most preferred embodiment of the present utility model is described above, but is not to be construed as the limit to claim System.The utility model is not only limited to above example, and its concrete structure allows to change.It is all in the utility model independent right It is required that protection domain in the various change made in scope of protection of the utility model.

Claims (7)

1. a kind of combination dust-proof sealing structure for bearing, including bearing outer ring, bearing inner race, dust-proof sealing structure is combined, The combination dust-proof sealing structure is arranged between the bearing outer ring and bearing inner race, it is characterised in that the combination sealing Dustproof construction includes dust ring, seal and support metallic framework, the internal diameter of the dust ring and is fixed on the bearing inner race, And the external diameter of the dust ring coordinates with the seal, the outer rim of the seal is fixed on by the support metallic framework On the bearing outside diameter, the support metallic framework is connected as one with the seal, and one end is set on the support frame There is sealing lip, the sealing lip contacts with dust ring interference.

2. the combination dust-proof sealing structure according to claim 1 for bearing, it is characterised in that：The dust ring bending For spill, the dust ring internal diameter is interference fitted with the bearing inner race.

3. the combination dust-proof sealing structure according to claim 2 for bearing, it is characterised in that：The sealing lip includes Outer lip and sealing epipharynx are sealed, and the inner ring inwall of the sealing outer lip and the dust ring is interference fitted, the sealing epipharynx It is interference fitted with the dust ring side wall.

4. the combination dust-proof sealing structure according to claim 3 for bearing, it is characterised in that：It is described sealing outer lip with The inwall resilient abutment of the dust ring, and the sealing epipharynx and the dust ring side wall also resilient abutment.

5. the combination dust-proof sealing structure according to claim 2 for bearing, it is characterised in that：Described dust ring External diameter end is bent into a chimb, is provided with the first groove being adapted with the chimb on the seal, the chimb with First groove gap coordinates, and forms a seal.

6. the combination dust-proof sealing structure according to claim 1 for bearing, it is characterised in that：The bearing outer ring is set The second groove is equipped with, the seal outer rim is by the support metallic framework elastic compression in second groove.

7. the combination dust-proof sealing structure according to claim 3 for bearing, it is characterised in that：Outside described sealing Lip, sealing epipharynx and sealing ring cooperatively form triangle seal groove and polygon seal groove, the sealing ring epipharynx and outer lip structure Into reverse-hook shape structure.