CN201747796U

CN201747796U - Waterproof bearing

Info

Publication number: CN201747796U
Application number: CN2010201334736U
Authority: CN
Inventors: 李永增
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-03-17
Filing date: 2010-03-17
Publication date: 2011-02-16
Anticipated expiration: 2020-03-17

Abstract

The utility model relates to a waterproof bearing, which comprises a bearing inner ring and a bearing outer ring, wherein at least one end of the waterproof bearing is covered with a waterproof piece; the waterproof piece comprises a ring seal plate; a metallic seal ring is fixedly arranged on one side of the ring seal plate in a coaxial sealing way; the ring seal plate is fixedly matched with the bearing outer ring in a sealing way; and the metallic seal ring is correspondingly matched with the bearing inner ring in a sliding sealing way. At least one end of the waterproof bearing is covered with the waterproof piece, the integral waterproof piece is positioned between the bearing inner ring and the bearing outer ring; in addition, the waterproof piece can be in contact with the bearing inner ring and the bearing outer ring more tightly when the axial pressure is exerted to the waterproof piece, so that the sealing capability is improved, external mud and water can be effectively prevented from entering the inner part of the waterproof bearing, the waterproof bearing can be prevented from being damaged by mud and water, and the service life of the waterproof bearing in the poor working condition can be prolonged. The metallic seal ring is arranged inside the waterproof piece, and mechanical seal is formed between the waterproof piece and the bearing inner ring after the metallic seal ring is arranged, so that on one hand, the sealing requirement can be satisfied and on the other hand, the abrasion resistance of the waterproof component can be improved.

Description

A kind of water-sealed bearing

Technical field

The utility model relates to a kind of water-sealed bearing.

Background technique

Chinese patent ZL200610095726.3 discloses a kind of rolling bearing of sealing, has the seal disc that is installed between bearing inner ring and the outer race and forms by liner plate and elaxtic seal, the sealing dish be arranged on one of two bearer rings around circular groove in, wherein seal disc has the elastic support part at its other end, from this supporting part two seal lips of coming out, these two seal lips interact with the undercutting that is arranged in another bearer ring, wherein undercutting designs asymmetricly, feasible formation is connected in first convex shoulder in raceway zone and second convex shoulder of outside, described convex shoulder diameter is different, wherein axial first seal lip to interior orientation frictionally is close on the inwall of undercutting, and the axially outwards directed second lip of seal and the convex shoulder of outside constitute first clearance seal, and with radially be spaced apart the 3rd seal lip of oriented interior orientation of preceding two seal lips, the sealing lip and first convex shoulder constitute second clearance seal, and the elastic support part in axial direction slopes inwardly with respect to the plane that forms perpendicular to running shaft under installment state.What the above-mentioned rolling bearing with sealing adopted is the structure of soft seal, the bearing of this structure only is adapted at using under the normal pressure, if have in the axial direction when using in the environment of certain pressure, axial pressure can affact on the seal ring, cause the seal ring distortion, cause the very weak of seal action change or even completely lose seal action, for example, when this kind stuffing box bearing uses on sand pump, its seal action will disappear, the grains of sand enter into bearing inside easily, make bearing just be damaged at short notice.

The model utility content

The purpose of this utility model provides a kind of water-sealed bearing, is subjected to axle when upwarding pressure in order to the seal ring that solves present stuffing box bearing, and it is more weak or even completely lose the problem of seal action that its sealing effect can become.

For achieving the above object, the utility model adopts following technological scheme: a kind of water-sealed bearing, comprise bearing inner race and bearing outer ring, at least one end cap of this bearing is equipped with waterproof case, described waterproof case comprises annular seal plate, one side co-axial seal of annular seal plate is installed with metallic packing ring, and described annular seal plate cooperates with the bearing outer ring fixing seal, and the corresponding slipper seal with bearing inner race of described metallic packing ring cooperates.

Described bearing inner race comprises second positioning section and metallic packing ring construction section, the external diameter of metallic packing ring construction section is less than the external diameter of second positioning section, described metallic packing ring is set in the outside of metallic packing ring construction section, and the described metal o-ring and the second positioning section opposing end faces are slidingly matched and constitute a pair of mechanical sealing surface.

Described bearing outer ring comprises first positioning section and waterproof case construction section, and the external diameter of waterproof case construction section is less than the external diameter of first positioning section, and the outer ring integrated setting of described annular seal plate has snap ring, and the snap ring interference is installed on the excircle of waterproof case construction section.

Described snap ring matches with the waterproof case construction section circumferentially is provided with the protruding and draw-in groove of the card that cooperatively interacts.

Described card is convexly equipped with and places on the snap ring, and described draw-in groove is arranged on the waterproof case construction section.

Be provided with stage clip with the opposing side of metallic packing ring on the described annular seal plate.

Water-sealed bearing of the present utility model, it at least at one end covers waterproof case is housed, the waterproof case integral cap is between bearing inner race and bearing outer ring, when being subjected to axial pressure, contacting between waterproof case and the inside and outside circle of bearing is tightr, has improved sealability, has prevented that effectively outside mud, water from entering into bearing inside, avoid bearing to be subjected to the damage of mud, water, improved the working life of bearing under bad working environments.Metallic packing ring is set in the waterproof case, is provided with behind the metallic packing ring and forms mechanical seal between the waterproof case and bearing inner race, satisfied the requirement of sealing on the one hand, improved the abrasion-resistance of waterproof case on the other hand.

Snap ring matches with the waterproof case construction section circumferentially is provided with the protruding and draw-in groove of the card that cooperatively interacts, and blocks protruding and draw-in groove corresponding matching, prevents that waterproof case and bearing outer ring are separated.During use, the inwall of bearing mounting hole is pressed on the outer ring of snap ring (Bearing Installation adopt be the mounting type of interference), has improved sealing effect.

Side at annular seal plate is provided with stage clip, this water-sealed bearing in use, stage clip provide one the sealing pretightening force, make mechanical sealing surface have than reliable sealing effect.

Description of drawings

Fig. 1 is the utility model water-sealed bearing embodiment's a structural representation;

Fig. 2 is the partial enlarged view I of Fig. 1.

Embodiment

Shown in Fig. 1,2, water-sealed bearing of the present utility model comprises the bearing inner race 2 and the bearing outer ring 1 of coaxial setting being provided with ball 11 between bearing inner race and the bearing outer ring.Bearing outer ring 1 comprises first positioning section and the waterproof case construction section 10 that one is extended, and the external diameter of waterproof case construction section 10 is less than the external diameter of first positioning section; Described bearing inner race comprises second positioning section and the metallic packing ring construction section 9 that one is extended, and the external diameter of metallic packing ring construction section 9 is less than the external diameter of second positioning section.Front end at this water-sealed bearing is stamped a waterproof case, and this waterproof case comprises an annular seal plate 3, and the outer ring integrated setting of annular seal plate 3 has snap ring 8, snap ring 8 and waterproof case construction section 10 interference fit.Annular seal plate also can by and the structure (as the bulge loop that cooperatively interacts and groove structure) of bearing outer ring end face secure fit realize being sealedly and fixedly connected between annular seal plate and the bearing outer ring.The inboard of annular seal plate 3 is installed with metallic packing ring 6, and metallic packing ring can also be wholely set with annular seal plate.Metallic packing ring 6 and annular seal plate 3 coaxial settings, and metallic packing ring is enclosed within the outside of metallic packing ring construction section 9, and the metal o-ring 6 and the second positioning section opposing end faces are slidingly matched and constitute a pair of mechanical sealing surface.It is protruding 4 that the inner side surface of snap ring is provided with card, correspondingly on the waterproof case construction section is provided with and blocks protruding 4 draw-in grooves that cooperate 5.In addition, also be provided with a stage clip 7 in the outside of annular seal plate, at water-sealed bearing in use, stage clip 7 provides a sealing pretightening force.Certainly, snap ring also can be arranged on the inner ring of annular seal plate, and with fixedly clamping of bearing inner race; And metal o-ring is arranged on the outer ring of snap ring, and is slidingly matched with bearing outer ring, forms mechanical seal, and the water-sealed bearing of this kind structural type belongs to protection domain of the present utility model equally.

Claims

1. water-sealed bearing, comprise bearing inner race and bearing outer ring, it is characterized in that: at least one end cap of this bearing is equipped with waterproof case, described waterproof case comprises annular seal plate, one side co-axial seal of annular seal plate is installed with metallic packing ring, described annular seal plate cooperates with the bearing outer ring fixing seal, and the corresponding slipper seal with bearing inner race of described metallic packing ring cooperates.

2. water-sealed bearing according to claim 1, it is characterized in that: described bearing inner race comprises second positioning section and metallic packing ring construction section, the external diameter of metallic packing ring construction section is less than the external diameter of second positioning section, described metallic packing ring is set in the outside of metallic packing ring construction section, and the described metal o-ring and the second positioning section opposing end faces are slidingly matched and constitute a pair of mechanical sealing surface.

3. water-sealed bearing according to claim 2, it is characterized in that: described bearing outer ring comprises first positioning section and waterproof case construction section, the external diameter of waterproof case construction section is less than the external diameter of first positioning section, the outer ring integrated setting of described annular seal plate has snap ring, and the snap ring interference is installed on the excircle of waterproof case construction section.

4. water-sealed bearing according to claim 3 is characterized in that: described snap ring matches with the waterproof case construction section circumferentially is provided with the protruding and draw-in groove of the card that cooperatively interacts.

5. water-sealed bearing according to claim 4 is characterized in that: described card is convexly equipped with and places on the snap ring, and described draw-in groove is arranged on the waterproof case construction section.

6. according to arbitrary described water-sealed bearing of claim 1-5, it is characterized in that: be provided with stage clip with the opposing side of metallic packing ring on the described annular seal plate.