CN210859572U

CN210859572U - Bearing sealing structure

Info

Publication number: CN210859572U
Application number: CN201921615406.5U
Authority: CN
Inventors: 景晓云
Original assignee: Jiaxing Ouzhi Automobile Technology Co ltd
Current assignee: ZHEJIANG HONGLI AUTO PARTS GROUP Co.,Ltd.
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2020-06-26
Anticipated expiration: 2029-09-26

Abstract

The utility model provides a novel and bearing seal structure, including the bearing inner race, bearing inner race and rolling element, be equipped with between bearing inner race and the bearing inner race and distribute 2 sealed dust mechanisms in the rolling element both sides along the bearing axial, sealed dust structure includes metal dirt-proof ring and rubber seal, be equipped with 2 annular oil storage tanks that extend along bearing circumference on rubber seal's the inner peripheral surface, the axial distribution of bearing is followed to annular oil storage tank, 2 annular oil storage tanks keep apart 3 annular archs that distribute along the bearing axial on rubber seal's the inner peripheral surface, the outer peripheral face sealing connection of one annular arch with the bearing inner race farthest away from the rolling element is in the same place, be clearance fit between the protruding coaxial bearing inner race of two rings in the rest. The first object of the present invention is to provide a bearing sealing structure with a small sealing contact area between the inner ring and the bearing of the rubber sealing ring, which solves the problem of the conventional bearing that the sealing contact area is large and the rotation of the bearing is hindered.

Description

Bearing sealing structure

Technical Field

The utility model relates to a bearing especially relates to a bearing seal structure.

Background

Bearings ("bearings", japan "axle bearings") are components that act to fix and reduce the coefficient of friction of loads during mechanical transmission. It can also be said that the member for reducing the friction coefficient during power transmission and keeping the center position of the shaft fixed when the other members are moved relative to each other on the shaft. The bearing is a lightweight part in modern mechanical equipment. Its main function is to support the mechanical rotating body to reduce the friction coefficient of mechanical load of equipment in the transmission process. The bearings can be classified into rolling bearings and sliding bearings according to the frictional properties of the moving elements. Some bearings are provided with dustproof sealing original paper, and the basic structure of the bearing provided with the dustproof sealing original paper is as follows: the dust sealing device comprises a bearing inner ring, a bearing outer ring and a rolling body located between the bearing inner ring and the bearing outer ring, wherein 2 dust sealing mechanisms distributed on two sides of the rolling body along the axial direction of a bearing are arranged between the bearing outer ring and the bearing inner ring, each dust sealing structure comprises a metal dust ring and a rubber sealing ring which are sleeved on the bearing inner ring, the rubber sealing rings are connected with the outer peripheral surfaces of the inner rings in the same axial direction in a sealing mode, and the rubber sealing rings are disconnected with the metal dust rings and provided with gaps. Therefore, the existing bearing provided with the dustproof sealing element has the following defects: the rubber sealing ring is in contact sealing with the outer peripheral surface of the inner bearing ring through the whole inner peripheral surface, so that the contact area is large, the friction is large, and the high-speed rotation of the bearing is prevented; in addition, because the gap between the rubber sealing ring and the metal dustproof ring is opened, grease easily overflows through the gap and external impurity particles easily enter the bearing through the gap, so that the bearing fails.

SUMMERY OF THE UTILITY MODEL

The first object of the present invention is to provide a bearing sealing structure with a small sealing contact area between the inner ring and the bearing of the rubber sealing ring, which solves the problem of the conventional bearing that the sealing contact area is large and the rotation of the bearing is hindered.

The second object of the present invention is to further provide a bearing sealing structure for sealing connection between a metal dust ring and a rubber sealing ring, which solves the problem of bearing failure caused by gap connection between the existing bearing sealing ring and the dust ring.

The technical problem is solved by the following technical scheme: a bearing sealing structure comprises a bearing inner ring, a bearing outer ring and a rolling body positioned between the bearing inner ring and the bearing outer ring, 2 dust sealing mechanisms which are distributed on two sides of the rolling body along the axial direction of the bearing are arranged between the bearing outer ring and the bearing inner ring, the dust sealing structure comprises a metal dustproof ring and a rubber sealing ring which are sleeved on the bearing inner ring, the rubber sealing ring is connected with the outer peripheral surface of the inner ring in the same axial direction in a sealing way, 2 annular oil storage grooves extending along the circumferential direction of the bearing are arranged on the inner peripheral surface of the rubber sealing ring, the annular oil storage tank is distributed along the axial direction of the bearing, 3 annular bulges distributed along the axial direction of the bearing are isolated from the 2 annular oil storage tanks on the inner peripheral surface of the rubber sealing ring, one annular bulge which is farthest away from the rolling body is connected with the outer peripheral surface of the inner ring of the bearing in a sealing way, and the rest two annular bulges are in clearance fit with the inner ring of the bearing. According to the technical scheme, the oil storage groove is formed in the inner circumferential surface of the rubber sealing ring, so that the sealing contact area can be reduced to reduce resistance, and the obstruction to high-speed rotation of the bearing is reduced; the oil storage ring plays a role in relieving pressure of lubricating oil entering between the annular protrusion and the bearing inner ring, so that the pressure of the annular protrusion which finally reaches the coaxial bearing inner ring for sealing connection is smaller, the oil leakage phenomenon is not easy to generate although the width of the sealing part is reduced, and the sealing reliability is ensured.

Preferably, the clearance between the bearing outer ring and the two remaining annular raised coaxial bearing inner rings is 0.01 mm to 1 mm. Namely, the outer diameter of the inner and outer of the bearing is 0.01 mm to 1 mm smaller than the inner diameter of the annular bulges at the two ends close to the rolling body. The pressure relief effect is good.

Preferably, the inner circumferential surface of the bearing outer ring is provided with an annular clamping groove extending along the circumferential direction of the shaft outer ring, the outer circumferential edge of the metal dust ring penetrates through the annular clamping groove, the metal dust ring and the rubber sealing ring are connected together in a sealing manner, and the metal dust ring and the annular clamping groove are connected together in a sealing manner. The leakage of lubricating oil from the joint of the metal dustproof ring and the rubber sealing ring and the leakage of lubricating oil from the joint of the metal dustproof ring and the bearing outer ring can be prevented, and the sealing dustproof effect of the bearing is improved. The annular clamping groove is arranged, and the metal dustproof ring is convenient to seal.

Preferably, the metal dust ring is provided with an elastic connecting ring extending along the circumferential direction of the metal dust ring, and the elastic connecting ring is hermetically clamped in the annular clamping groove to connect the metal dust ring and the annular clamping groove together in a sealing manner. Can realize the sealed of metal dust ring coaxial bearing outer lane through the elastic deformation of taking care of the connecting ring, it is convenient when sealing up.

Preferably, the elastic connecting ring and the rubber sealing ring are connected together to cover the whole end face of the metal dust-proof ring. Can protect carrying out the dust ring to delay the ageing speed of metal dust ring.

Preferably, the metal dust ring is located between the rubber seal ring and the rolling body. The protective effect to the metal dust ring is better.

Preferably, the metal dust ring is fixedly connected with the bearing outer ring. The bearing can be worn at the sealing position when rotating, and the force of lubricating oil at the sealing position is smaller than the force of lubricating oil at the positions of the outer ring of the bearing and the metal dustproof ring due to the influence of centrifugal force when the bearing moves. Thereby making the seal more reliable.

The utility model has the advantages of that: the oil storage groove is arranged on the inner circumferential surface of the rubber sealing ring, so that the sealing contact area can be reduced, the resistance can be reduced, and the obstruction to the high-speed rotation of the bearing can be reduced; the oil storage ring plays a role in relieving pressure of lubricating oil entering between the annular protrusion and the bearing inner ring, so that the pressure of the annular protrusion which finally reaches the coaxial bearing inner ring for sealing connection is smaller, the oil leakage phenomenon is not easy to generate although the width of the sealing part is reduced, and the sealing reliability is ensured.

Drawings

Fig. 1 is a schematic view of the present invention.

Fig. 2 is a partially enlarged schematic view of a portion a of fig. 1.

In the figure: the bearing comprises a bearing inner ring 1, a bearing outer ring 2, a retainer 3, balls 4, a metal dust ring 5, a rubber sealing ring 6, an annular oil storage groove 7, an annular bulge 8, an annular bulge 9 farthest away from a rolling body, an annular clamping groove 10 and an elastic connecting ring 11.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

Referring to fig. 1 and 2, a bearing seal structure includes a bearing inner ring 1, a bearing outer ring 2, and rolling bodies between the bearing inner ring and the bearing outer ring. The rolling elements comprise cages 3 and balls 4. And 2 sealing dust mechanisms which are distributed on two sides of the rolling body along the axial direction of the bearing are arranged between the bearing outer ring and the bearing inner ring. The dust sealing structure comprises a metal dustproof ring 5 and a rubber sealing ring 6 which are sleeved on the bearing inner ring. The inner peripheral surface of the rubber seal ring is provided with 2 annular oil storage grooves 7 extending along the circumferential direction of the bearing. The annular oil storage grooves are distributed along the axial direction of the bearing. The 2 annular oil storage grooves isolate 3 annular bulges 8 which are distributed along the axial direction of the bearing on the inner circumferential surface of the rubber sealing ring. The annular bulge 9 farthest away from the rolling body is connected with the outer peripheral surface of the inner bearing ring in a sealing way, and the rest two annular bulges are in clearance fit with the inner bearing ring. The clearance between the bearing outer ring and the two remaining annular convex coaxial bearing inner rings is 0.01 mm to 1 mm. And the inner circumferential surface of the bearing outer ring is provided with an annular clamping groove 10 extending along the circumferential direction of the shaft outer ring. The metal dustproof ring is provided with an elastic connecting ring 11 which extends along the circumferential direction of the metal dustproof ring. The elastic connecting ring is hermetically clamped in the annular clamping groove to hermetically connect the metal dustproof ring and the annular clamping groove together. The outer periphery of the metal dustproof ring is arranged in the annular clamping groove in a penetrating mode. The metal dustproof ring is fixedly connected with the bearing outer ring, such as fixed through glue. The metal dust ring is connected with the rubber sealing ring in a sealing way. The elastic connecting ring and the rubber sealing ring are connected together to cover the whole end face of the metal dustproof ring. The metal dustproof ring is positioned between the rubber sealing ring and the rolling body.

Claims

1. A bearing sealing structure comprises a bearing inner ring, a bearing outer ring and a rolling body positioned between the bearing inner ring and the bearing outer ring, 2 dust sealing mechanisms which are distributed on two sides of the rolling body along the axial direction of the bearing are arranged between the bearing outer ring and the bearing inner ring, the dust sealing structure comprises a metal dustproof ring and a rubber sealing ring which are sleeved on the bearing inner ring, the rubber sealing ring is connected with the outer peripheral surface of the axial inner ring in a sealing way, it is characterized in that the inner circumferential surface of the rubber sealing ring is provided with 2 annular oil storage grooves extending along the circumferential direction of the bearing, the annular oil storage tank is distributed along the axial direction of the bearing, 3 annular bulges distributed along the axial direction of the bearing are isolated from the 2 annular oil storage tanks on the inner peripheral surface of the rubber sealing ring, one annular bulge which is farthest away from the rolling body is connected with the outer peripheral surface of the inner ring of the bearing in a sealing way, and the rest two annular bulges are in clearance fit with the inner ring of the bearing.

2. A bearing seal according to claim 1, wherein the clearance between the outer race and the remaining two of the annular raised inner races is 0.01 mm to 1 mm.

3. A bearing seal structure according to claim 1 or 2, wherein an annular groove extending along the circumferential direction of the outer race is provided on the inner circumferential surface of the outer race, the outer circumferential edge of the metal dust ring is inserted into the annular groove, the metal dust ring is sealingly connected to the rubber seal ring, and the metal dust ring is sealingly connected to the annular groove.

4. The bearing seal structure of claim 3, wherein the metal dust ring is provided with an elastic connection ring extending along a circumferential direction of the metal dust ring, and the elastic connection ring is sealingly clamped in the annular clamping groove to sealingly connect the metal dust ring and the annular clamping groove together.

5. The bearing seal structure according to claim 4, wherein said elastic connection ring and said rubber seal ring are connected together so as to cover the entire end face of said metal dust ring.

6. A bearing seal according to claim 5, wherein said metal dust ring is located between said rubber seal and said rolling elements.

7. A bearing seal according to claim 3, wherein said metal dust collar is fixedly attached to said bearing outer race.