CN201081008Y

CN201081008Y - Waterproof sealing pulley

Info

Publication number: CN201081008Y
Application number: CNU2007200807020U
Authority: CN
Inventors: 唐允文
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-08-20
Filing date: 2007-08-20
Publication date: 2008-07-02
Anticipated expiration: 2017-08-20

Abstract

The utility model relates to a waterproof sealed pulley which comprises a bearing holder, a shaft holder, a floating oil-seal ring A, a floating oil-seal ring B, elastic rubber rings, a cage nut and so on, wherein, the bearing holder is in tight connection with a bearing outer ring and moves along with the bearing outer ring and a pulley; the shaft holder is fixed on a pulley shaft and moves along with the pulley shaft; the floating oil-seal ring A is arranged in the bearing holder, and the elastic rubber ring is arranged between the floating oil-seal ring A and the bearing holder; the floating oil-seal ring B is arranged in the shaft holder, and an elastic rubber ring is arranged between the floating oil-seal ring B and the shaft holder; end parts of the floating oil-seal ring A and the floating oil-seal ring B contact tightly; librating oil is between each part; because of the locking and extrusion of the cage nut, the floating oil-seal ring B is always contacted with the floating oil-seal ring A tightly under the extrusion of the elastic rubber rings, and dust, sewage and silt are prevented from passing through, thereby keeping sealed state inside the bearing.

Description

A kind of waterproof sealing pulley

Technical field

The utility model relates to a kind of pulley, mainly is a kind of waterproof sealing pulley.

Background technique

At present, known waterproof sealing pulley is the sealing cover that installs plastic cement or metal in the bearing ball of the pulley outside additional, and in the gap between sealing cover and bearing apply grease to improve sealing effect.

Such technology has the following disadvantages: for the rotation that guarantees bearing flexible, certainly exist the gap between sealing cover and the bearing, though grease can be filled up these gaps, but the poor durability of grease, As time goes on meeting run off, ageing failure, particularly in water, work, grease is very fast to be washed away, corrodes by water and lose seal action, after entering abrasive particles such as silt, dust in the bearing, more can reduce greatly working life, the relative friction of sealing cover and bearing also can make the gap between sealing cover and the bearing strengthen, and reduces sealing effect.

The model utility content

The purpose of this utility model provides a kind of waterproof sealing pulley, continues the airtight float grease seal ring of contact to keep bearing inner and outside isolated by installing additional, remedies the deficiencies in the prior art.

The purpose of this utility model is achieved in that a kind of water-tight pulley, comprise pulley disc, bearing and pulley spindle, pulley disc and outer race are fastenedly connected, pulley spindle and bearing inner ring are fastenedly connected, pulley disc can rotate flexibly around pulley spindle, it is characterized in that: the bearing deck also is installed in the pulley disc both sides, the bearing deck is a loop configuration, be fastenedly connected with outer race, with outer race and pulley disc servo-actuated, bearing deck annular inboard is the plane of inclination of toe-in, the axle deck is fixed on the pulley spindle by lock nut, with the pulley spindle servo-actuated, axle deck annular inboard is outside convergent plane of inclination, the A float grease seal ring, the B float grease seal ring is that the cross section is the rigidity ring body of wedge type, the inclination angle of wedge type is consistent with the inboard convergent angle of bearing deck and axle deck, the A float grease seal ring is installed in the bearing deck, flexible glue ring between A float grease seal ring and bearing deck, the B float grease seal ring is installed in the deck, flexible glue ring between B float grease seal ring and axle deck, the A float grease seal ring closely contacts with the end face of B float grease seal ring, between each part lubricant oil is arranged.

During use, because the locking of lock nut extruding, the B float grease seal ring keeps closely contacting with the A float grease seal ring under the extruding of elastic rubber ring all the time, also make dust, sewage, silt can not pass through, thereby make the inner air-tight state that keeps of bearing, when bearing rotates, the bearing deck, the A float grease seal ring rotates with outer race and pulley, the axle deck, the B float grease seal ring, lock nut rotates with pulley spindle, the A float grease seal ring is relative with the B float grease seal ring to rub, even produce wearing and tearing, the elasticity of two elastic rubber rings also can keep the A float grease seal ring closely to contact with the B float grease seal ring, make bearing seal ring keep air-tight state, after long-time the use, regularly screw lock nut.

By implementing the utility model; make friction between original sealing cover and the bearing change friction between inner A float grease seal ring of seal arrangement and the B float grease seal ring into; A float grease seal ring and B float grease seal ring produce wearing and tearing; the elasticity of two elastic rubber rings also can keep the A float grease seal ring closely to contact with the B float grease seal ring; make bearing seal ring keep air-tight state, make bearing obtain better protection.

Description of drawings

Fig. 1 is a scheme of installation of the present utility model;

Fig. 2 is the partial enlarged drawing of Figure 1A part;

Fig. 3 uses scheme of installation of the present utility model when a plurality of sheave block is installed on coaxial.

1 is pulley disc among the figure, the 2nd, and bearing deck, the 3rd, a deck, the 4th, lock nut, the 5th, pulley spindle, the 6th, outer race, the 7th, A float grease seal ring, the 8th, B float grease seal ring, the 9th, elastic rubber ring.

Embodiment

The utility model is further described by embodiment below in conjunction with accompanying drawing.

A kind of water-tight pulley, comprise pulley disc 1, bearing and pulley spindle 5, pulley disc 1 is fastenedly connected with outer race 6, pulley spindle 5 is fastenedly connected with bearing inner ring, pulley disc 1 can rotate flexibly around pulley spindle 5, it is characterized in that: bearing deck 2 also is installed in pulley disc 1 both sides, bearing deck 2 is a loop configuration, be fastenedly connected with outer race 6, with outer race 6 and pulley disc 1 servo-actuated, the annular inboard of bearing deck 2 is the plane of inclination of toe-in, axle deck 3 is fixed on the pulley spindle 5 by lock nut 4, with pulley spindle 5 servo-actuateds, the annular inboard of axle deck 3 is outside convergent plane of inclination, A float grease seal ring 7, B float grease seal ring 8 is the rigidity ring body of wedge type for the cross section, the inclination angle of wedge type is consistent with the inboard convergent angle of bearing deck 2 and axle deck 3, A float grease seal ring 7 is installed in the bearing deck 7, flexible glue ring 9 between A float grease seal ring 7 and bearing deck 2, B float grease seal ring 8 is installed in the deck 4, flexible glue ring 9 between B float grease seal ring 8 and axle deck 4, A float grease seal ring 7 closely contacts with the end face of B float grease seal ring 8, between each part lubricant oil is arranged.

During use, because the locking of lock nut 8 extruding, B float grease seal ring 8 keeps closely contacting with A float grease seal ring 7 under the extruding of elastic rubber ring 9 all the time, also make dust, sewage, silt can not pass through, thereby make the inner air-tight state that keeps of bearing, when bearing rotates, bearing deck 2, A float grease seal ring 7 rotates with outer race 6 and pulley 1, axle deck 3, B float grease seal ring 8, lock nut 4 rotates with pulley spindle 5, A float grease seal ring 7 and the 8 relative frictions of B float grease seal ring, even produce wearing and tearing, the elasticity of two elastic rubber rings 9 also can keep A float grease seal ring 7 closely to contact with B float grease seal ring 8, make bearing seal ring keep air-tight state, after long-time the use, regularly screw lock nut 4.

As other mode of execution of the present utility model; many group pulleys can be installed on same pulley spindle; need not this moment at each bearing two ends installation fastening nut 4; only need at many group bearings two ends other parts of water-tight pulley to be clamped to install get final product with fastening nut 4; though reduced part fastening nut 4, but still be protection domain of the present utility model.

Claims

1. water-tight pulley, comprise pulley disc (1), bearing and pulley spindle (5), pulley disc (1) is fastenedly connected with outer race (6), pulley spindle (5) is fastenedly connected with bearing inner ring, pulley disc (1) can rotate flexibly around pulley spindle (5), it is characterized in that: bearing deck (2) also is installed in pulley disc (1) both sides, bearing deck (2) is a loop configuration, be fastenedly connected with outer race (6), with outer race (6) and pulley disc (1) servo-actuated, the annular inboard of bearing deck (2) is the plane of inclination of toe-in, axle deck (3) is fixed on the pulley spindle (5) by lock nut (4), with pulley spindle (5) servo-actuated, the annular inboard of axle deck (3) is outside convergent plane of inclination, A float grease seal ring (7), B float grease seal ring (8) is the rigidity ring body of wedge type for the cross section, the inclination angle of wedge type is consistent with the inboard convergent angle of bearing deck (2) and axle deck (3), A float grease seal ring (7) is installed in the bearing deck (7), flexible glue ring (9) between A float grease seal ring (7) and bearing deck (2), B float grease seal ring (8) is installed in the deck (4), flexible glue ring (9) between B float grease seal ring (8) and axle deck (4), A float grease seal ring (7) closely contacts with the end face of B float grease seal ring (8), between each part lubricant oil is arranged.