CN102136700A

CN102136700A - Pulley

Info

Publication number: CN102136700A
Application number: CN2011100207450A
Authority: CN
Inventors: 张兴响; 蔡旭东; 苏武; 曹孝陈
Original assignee: Changshu Great Wall Bearing Co Ltd
Current assignee: Changshu Great Wall Bearing Co Ltd
Priority date: 2011-01-18
Filing date: 2011-01-18
Publication date: 2011-07-27

Abstract

The invention discloses a pulley comprising a bracket (2), a wheel (3) and a pin axle (6). The wheel (3) is arranged in the bracket (2) and supported by the pin axle (6) on the bracket (2); an inner ring (8) and an outer ring (7) are arranged between the wheel (3) and the pin axle (6); a cylindrical roller (10) is arranged between the inner ring (8) and the outer ring (7); and a spacing collar (9) capable of fixing the position of the cylindrical roller (10) is arranged between the bracket (2) and the inner ring (8) in the axial direction of the pin axle (6). In the invention, the rotation of the wheel (3) of the pulley is realized by means of the rolling friction of the cylindrical roller (10), which is far less than the frequently used sliding friction, and the cylindrical roller (10) can improve extremely high bearing capability and effectively improves the safety factor. Meanwhile, in the invention, a sealing structure is adopted, and lubricating grease with long service life is injected in advance, therefore, the bearing and the surrounding environment are isolated.

Description

Coaster

Technical field

The present invention relates to a kind of coaster, particularly a kind of have a high bearing capacity, rotates coaster flexibly.

Background technology

When aerial cable is carried out in power equipment field work, a kind of coaster is as shown in Figure 1 used in the capital, it is made up of hook 1, shelf 2, wheel 3, external bushing 4, neck bush 5 and bearing pin 6, wheel 3 and external bushing 4 tight fits, neck bush 5 and bearing pin 6 tight fits, external bushing 4 and neck bush 5 all adopt high-abrasive material to make, and the slide relative by neck bush 5, external bushing 4 when work makes wheel 3 rotate.

The advantage of the coaster of this form is simple in structure, bearing capacity is big, shortcoming is that processing is coarse, frictional force between interior external bushing is big, the rotation underaction, and in during operation in the open air the external bushing compole easily water inlet make lining get rusty, cause coaster stuck, therefore the maintenance workload of coaster is big, and the life-span is also shorter.

Summary of the invention

Technical problem to be solved by this invention provides a kind of high bearing capacity that has, and rotates coaster flexibly.

In order to solve above-mentioned technical problem, technical scheme of the present invention is: a kind of coaster, comprise shelf, the inner wheel that is provided with of shelf and the bearing pin of shelf upper support wheel, between wheel and bearing pin, be provided with inner ring and outer ring, be provided with cylindrical roller between inner ring and the outer ring, on the axial direction of bearing pin, but be provided with the spacer ring of fixed cylinder roller position between shelf and the inner ring.

In order to improve the work quality of coaster, reduce the problem that the inner cylinder roller brings because of outside contamination, be provided with sealing ring between the both sides of described outer ring and inner ring, an end of described sealing ring is fixed in the seal groove on the outer ring, and its other end is close on the periphery of back-up ring.

In order to improve the sealing property of sealing ring, described sealing ring is for being made of skeleton and the rubber that is fixed on the skeleton two ends.

For further improving sealing property, a side rubber of the sealing ring that described and back-up ring is close to is the elbow shape.

The present invention is because the wheel rotation of coaster is the rolling friction that relies on cylindrical roller to realize, much smaller than the sliding friction of frequent utilization, cylindrical roller can provide high bearing capacity again, has improved coefficient of safety effectively.Simultaneously, adopt hermetically-sealed construction, and the long-life lubricating grease of annotating in advance, it is isolated that bearing and surrounding environment have been had, and the steam of bearing outside or the water of certain pressure are isolated in the bearing outside, and can not enter bearing inside, prevent that inside from getting rusty, prolonged the useful life and the maintenance cycle of bearing greatly.

Description of drawings

Fig. 1 is the structural representation of the coaster that uses in the prior art.

Fig. 2 is a pulley structure schematic diagram of the present invention.

Fig. 3 is the structural representation of sealing ring.

Embodiment

As shown in Figure 2, a kind of coaster, comprise shelf 2, the shelf 2 inner wheels 3 that are provided with and the bearing pin 6 of shelf 2 upper support wheels 3, between wheel 3 and bearing pin 6, be provided with inner ring 8 and outer ring 7, be provided with cylindrical roller 10 between inner ring 8 and the outer ring 7, on the axial direction of bearing pin 6, but be provided with the spacer ring 9 of fixed cylinder roller 10 positions between shelf 2 and the inner ring 8.

For cylindrical roller 10 is hedged off from the outer world, between the both sides of described outer ring 7 and inner ring 8, be provided with sealing ring 11, an end of described sealing ring 11 is fixed in the seal groove on the outer ring 7, and its other end is close on the periphery of back-up ring 9.

In order to improve the sealing property of sealing ring 11, as shown in Figure 3, the present invention is designed to sealing ring 11 to be made up of skeleton 12 and rubber 13 bodies that are fixed on skeleton 12 two ends.

Becoming an elbow, with further raising sealing property with rubber 13 body preferred design that back-up ring 9 is close to.

Fill out lubricating grease in advance in the space that outer ring 7, inner ring 8, sealing ring 11 and cylindrical roller 10 surround, inside is filled out lubricating grease in advance, and use does not need to safeguard in the future substantially.

The foregoing description does not limit the present invention in any way, and every employing is equal to replaces or technical scheme that the mode of equivalent transformation obtains all drops in protection scope of the present invention.

Claims

1. coaster, comprise shelf (2), the inner wheel (3) that is provided with of shelf (2) and the bearing pin (6) of shelf (2) upper support wheel (3), it is characterized in that: between wheel (3) and bearing pin (6), be provided with inner ring (8) and outer ring (7), be provided with cylindrical roller (10) between inner ring (8) and outer ring (7), on the axial direction of bearing pin (6), shelf (2) and inner ring (8) but between be provided with the spacer ring (9) of fixed cylinder roller (10) position.

2. coaster according to claim 1, it is characterized in that: between the both sides of described outer ring (7) and inner ring (8), be provided with sealing ring (11), one end of described sealing ring (11) is fixed in the seal groove on the outer ring (7), and its other end is close on the periphery of back-up ring (9).

3. coaster according to claim 2 is characterized in that: described sealing ring (11) is for by skeleton (12) be fixed on rubber (13) formation at skeleton (12) two ends.

4. coaster according to claim 3 is characterized in that: a side rubber (13) of the sealing ring (11) that described and back-up ring (11) is close to is the elbow shape.