CN2184814Y - Single direction bearing type end face speed reducing clutch - Google Patents

Abstract

The utility model relates to a unidirectional bearing type end face speed reducing clutch, which eliminates a torsion spring and a brake ribbon on the base of the original speed reducing clutches, and is composed of a brake arm, screw nuts, a belt pulley, a rolling bearing, a washing output shaft, a dehydrating shaft, rubber water sealing, a ball-bearing, an upper end cover, a decelerator assembly, a lower shell, pins and a brake arm spring. The utility model is characterized in that the right end of the lower shell is coaxially provided with a brake disk device and an adjusting device for adjusting the tightness between the friction surface of the lower shell and the brake disk, and the dehydrating shaft of the upper end cover is provided with a unidirectional bearing, which matches and connects with the upper end cover. The utility model overcomes the problems brought by the torsion spring and the brake ribbon, and has the advantages of stable performance and long service life.

Description

Single direction bearing type end face speed reducing clutch

The utility model relates to gearing down machinery, especially for the unilateral bearing formula end face brake deceleration clutch on the washing machine.

At present, reducing gear clutch for full automatic washing machine generally adopts torsion spring and brake strap to do the forward and reverse anti-transfer braking of dehydration barrel both at home and abroad.Use the torsion spring braking to have following shortcoming: make with the steel wire of φ 3 because of torsion spring (1), and itself is thinner, adds that heat treatment hardness is inhomogeneous, makes the torsion spring arm easily produce the phenomenon that fractures at the position that links to each other with spiral, in case fracture, whole speed-reducing clutch can't be worked; (2) torsion spring spiral part inner hole sleeve has certain magnitude of interference at the retarder right-hand member, and when dehydration during work, around to torsion spring is unclamped a bit, but axle still has friction with the torsion spring inner ring by retarder right-hand member and torsion spring, produces noise and spool weares and teares; (3) torsion spring often is subjected to the effect of the tired moment of clockwise and anticlockwise and easily broken; (4) the torsion spring the other end is fixed on clutch outer member Xiao and nails on, and error appears in its both centre distance degree of accuracy, torsion spring arm gradient, positioning ring precision etc., all can cause big noise, makes dehydration work undesired.

Also there are the following problems when adopting brake strap to brake: (1) brake strap relies on the friction of retarder outer ring and brakes, and produces friction noise; (2) braking force must be adjusted in advance, can't regulate in the use; (3) the brake strap inner ring must be even with retarder shell gap, very big radially wobble and hit the cylinder phenomenon otherwise produce in when braking; (4) since the brake strap inner ring contact with the non-full circle of retarder cylindrical, therefore bigger in the drag friction power of brake arm immovable point opposite direction, thus rocking and swinging when appearance is braked.

The purpose of this utility model is to improve the brake structure of speed-reducing clutch, adopts unilateral bearing to replace torsion spring, adopts the end face brake structure to replace the brake strap braking, constitutes unilateral bearing formula end face brake deceleration clutch.

The utility model is finished as follows: on the basis that original speed-reducing clutch is made up of brake arm, nut, belt pulley, rolling bearing, washing output shaft, dehydrating shaft, rubber water sealing, ball bearing, upper end cap, speed reducer assembly, lower shell body, Xiao Ding, brake arm spring, be coaxially installed with the brake disc device and in order to regulate the controlling device of brake disc and lower shell body rubbing surface tightness degree at the lower shell body right-hand member, unilateral bearing also is installed on the dehydrating shaft in upper end cap, and this unilateral bearing and upper end cap are connected.

Said brake disc device has brake pressing plate, brake axle sleeve by brake disc on it, axle sleeve is with brake spring, clutch brake cover and braking baffle ring outward, and with coaxial spline spring seat, the clutch spring of also being equipped with of axle sleeve, the clutch shaft cover embeds in the clutch spring and constitutes.On the inner ring serrate slot of brake disc the brake axle sleeve is housed, has brake spring and spline spring seat to connect at sleeve outer circle.The clutch spring is housed in this spring seat, and connects with the clutch axle sleeve, the ring gear on the spline spring seat connects mutually with speed reducer assembly end axle, and the other end of brake spring connects mutually with the clutch brake cover.The flexible braking baffle ring of hoop on braking sleeve.

Said brake disc controlling device be with on the adjusting screw pressure spring pass the brake pressing plate be threaded with upper shell.

Said unilateral bearing and upper end cap are connected, and three kinds of forms are arranged; Have outer floating to install, promptly unilateral bearing close-fitting gland is in bearing support, and bearing support is connected with screw with upper end cap; Have internal floating type to install, promptly the unilateral bearing outer ring is that gear with curved teeth cooperates with bearing support inner arc gear ring and embeds in it, and bearing support is connected with Xiao Ding with upper end cap; Have combined to install, promptly unilateral bearing and ball bearing are made one, are fitted in the upper end cap and its close-fitting.

The utility model and conventional art have following advantage: 1, owing to adopt unilateral bearing to replace torsion spring, situations such as torsion spring fractures, friction noise, axle wearing and tearing can not occur, runnability is stablized and is improved working life greatly; 2, owing to adopt the screw spring to regulate the tightness degree of brake disc and casing friction face, no matter after complete machine assembles or in the running, when changing, all can regulate brake weight, all can be coated with lubricant grease (being definitely unallowed) in several relative fricting couple pieces in belt brake, so the different sound of its drag friction reduces greatly, simultaneously because the action direction of braking force is the axial direction at retarder, therefore braking steadily, in the time of can not occurring braking seriously rock with laundry machine dehydration the time brake hit the cylinder phenomenon; 3, reduce the tractive force of brake rod, reduce to 1.5N from original 35N.

Further describe below in conjunction with accompanying drawing.

Fig. 1 is the utility model structural drawing.

With reference to Fig. 1, original speed-reducing clutch is made up of brake arm (1), nut (11), belt pulley (12), rolling bearing (15), washing output shaft (16), dehydrating shaft (17), rubber water sealing (18), ball bearing (19), upper end cap (23), speed reducer assembly (24), lower shell body (25), Xiao Ding (26), brake arm spring (27).Be coaxially installed with the brake disc device and in order to regulate the controlling device of brake disc and lower shell body (25) rubbing surface tightness degree at lower shell body (25) right-hand member; In upper end cap (23), unilateral bearing (20) is installed on the dehydrating shaft (17), this unilateral bearing (20) is connected with upper end cap (23).

Here, the brake disc device is by brake disc (2), be pressed with brake pressing plate (3), brake axle sleeve (4) on it, outer brake spring (5), clutch brake cover (6) and the braking baffle ring (7) of being with of axle sleeve (4), with coaxial spline spring seat (8), the clutch spring (9) of also being equipped with of axle sleeve (4), clutch axle sleeve (10) embeds in the spring (9) and constitutes.Brake axle sleeve (4) is housed in the inner ring serrate slot of brake disc (2), has brake spring (5) and spline spring seat (8) to connect at axle sleeve (4) cylindrical.Clutch spring (9) is housed in the spring seat (8), and connects with clutch axle sleeve (10), the ring gear on the spring seat (8) connects mutually with speed reducer assembly (24) end axle.The other end of brake spring (5) connects mutually with clutch brake cover (6).Go up hoop flexible braking baffle ring (7) in braking sleeve (6).Constitute the brake disc device with the connection of upper-part between with it.

The tight program of brake disc (2) and lower shell body (25) rubbing surface is controlled by controlling device, and this device passes the pressing plate (3) that the brakes formation that is threaded with upper shell (25) by being with pressure spring (14) on the adjusting screw (13).Each three on screw (13) and pressure spring (14).Tighten screw (13) and make pressure spring (14) pressurized, be delivered to brake pressing plate (3), be delivered to again on the brake disc (2), the brake disc (2) and the rubbing surface tightness degree of lower shell body (25) are increased, thereby regulate brake weight energetically.When moving, washing machine also can carry out.

As shown, unilateral bearing (20) is connected with upper end cap (23), three kinds of forms are arranged: a kind of is that outer floating is installed, be about to unilateral bearing (20) close-fitting gland in bearing support (21), and bearing support (21) is connected with screw (22) with upper end cap (23), utilize between screw (22) and the fixed hole indirectly, bearing support (21) is floated to be installed on the upper end cap (23), its effect of floating is the concentricity that guarantees unilateral bearing (20) and ball bearing (19), and bearing support (21) and unilateral bearing (20) two assembly parties have replaced the effect of torsion spring in the past, and than torsion spring superior be in: torsion spring can not occur and fracture, situations such as friction noise and reducer shaft serious wear, runnability are further stable.

A kind of is that internal floating type is installed, and promptly unilateral bearing (20) outer ring is a gear with curved teeth, cooperates with bearing support (21) inner arc gear ring to embed in it, and bearing support (21) is connected with Xiao Ding with upper end cap (23).Because unilateral bearing (20) embeds mutually with bearing support (21) convex and concave teeth, can make a small amount of radial floating, but can not rotate, with the concentricity of assurance with ball bearing (19).Play the effect that replaces torsion spring too.

Another is that combined is installed, and promptly unilateral bearing (20) is made one with ball bearing, is fitted in the upper end cap (23) and its close-fitting, plays the effect that replaces torsion spring.Because the roller of unilateral bearing does not directly contact with the axle of retarder, thereby can not cause this position wear problems of retarder, the working life of improving speed-reducing clutch greatly.Unilateral bearing inner ring and ball bearing inner ring are same body structure simultaneously, precision and concentricity height, and hardness height after the inner ring heat treatment, longer service life, and also noise is low, is more satisfactory structural type.

Claims (4)

1, unilateral bearing formula end face brake deceleration clutch, by brake arm (1), nut (11), belt pulley (12), rolling bearing (15), washing output shaft (16), dehydrating shaft (17), rubber water sealing (18), ball bearing (19), upper end cap (23), speed reducer assembly (24), lower shell body (25), Xiao Ding (26), brake arm spring (27) is formed, it is characterized in that lower shell body (25) right-hand member is coaxially installed with the brake disc device and in order to regulate the controlling device of brake disc and lower shell body (25) rubbing surface tightness degree, also in upper end cap (23), unilateral bearing (20) is installed on the dehydrating shaft (17), and this unilateral bearing (20) is connected with upper end cap (23).

2, according to the said clutch of claim 1, it is characterized in that said brake disc device is by brake disc (2), be pressed with brake pressing plate (3) on it, brake axle sleeve (4), the outer brake spring (5) that is with of axle sleeve (4), clutch brake cover (6) and braking baffle ring (7), with the coaxial spline spring seat (8) that also is equipped with of axle sleeve (4), clutch spring (9), clutch axle sleeve (10) embeds in the spring (9) and constitutes, brake axle sleeve (4) is housed in the inner ring serrate slot of brake disc (2), there are brake spring (5) and spline spring seat (8) to connect at axle sleeve (4) cylindrical, clutch spring (9) is housed in the spring seat (8), and connect with clutch axle sleeve (10), ring gear on the spring seat (8) connects mutually with speed reducer assembly (24) end axle, the other end of brake spring (5) connects mutually with clutch brake cover (6), goes up hoop flexible braking baffle ring (7) in braking sleeve (6); Said controlling device be with on the adjusting screw (13) pressure spring (14) pass the brake pressing plate (3) be threaded with upper shell (25).

3, according to claim 1 or 2 said clutches, it is characterized in that unilateral bearing (20) and upper end cap (23) are connected, have outer floating to install, promptly unilateral bearing (20) close-fitting gland is in bearing support (21), and bearing support (21) is connected with screw (22) with upper end cap (23); Perhaps internal floating type is installed, and promptly unilateral bearing (20) outer ring is a gear with curved teeth, cooperates with bearing support (21) inner arc gear ring to embed in it, and bearing support (21) is connected with Xiao Ding with upper end cap (23); Perhaps combined is installed, and promptly unilateral bearing (20) is made one with ball bearing, is fitted in the upper end cap (23) and its close-fitting.

4,, it is characterized in that each 3 of adjusting screw (13) and pressure spring (14) according to the said clutch of claim 2.

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