CN2377112Y

CN2377112Y - Improved universal ball caster

Info

Publication number: CN2377112Y
Application number: CN 99210352
Authority: CN
Inventors: 芮家凤
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-06-02
Filing date: 1999-06-02
Publication date: 2000-05-10
Anticipated expiration: 2009-06-02

Abstract

The utility model provides an improved spherical universal caster. The utility model is characterized in that a connecting screw rod is fixedly connected to the top end of a support seat in the shape of a cylinder cap; an arc-shaped ball bearing fossa is arranged on the inner top surface of a cap cylinder; an edge opening of the cap cylinder is in the shape of a bell mouth, an annular frame is arranged on the lower circumference of the edge of the cap cylinder, and a slope-shaped ball bearing back groove is arranged on the upper edge of the frame; ball bearings are laid in the arc-shaped ball bearing fossa, and a spherical roller is sheathed in an inner cavity of the cap cylinder and is covered by the ball bearings; the lower end head of the cap cylinder is provided with an annular positioning sleeve and is positioned by buckling a convex-concave groove. The improved spherical universal caster has the advantages of firm support, even stress, flexible rotation and continuous and steady rolling, no jump and small noise. Besides, the improved spherical universal caster can not be damaged easily and is suitable for heavy objects such as sofas, beds, cabinets, refrigerators and washing machines, etc., which need frequent move.

Description

Improved type spherical universal castor

The utility model belongs to castor, specifically a kind of improved type spherical universal castor.

In daily life, people run into the problem that needs to move heavy object through regular meeting, for example sweep health and will move sofa, bed, cabinet, and maintenance electrical equipment need move electric refrigerator, laundry machine or the like.Product designers have designed various universal caster wheels under the circumstances, provide many convenience to the user.In universal caster wheel various in style, the spherical universal castor that is provided with the ball nest is reasonable at last a kind of.Though it overcome the friction drag that exists in traditional universal caster wheel big, move effort, shortcoming such as fragile, but still exist poor continuity, the flexibility ratio of rolling not enough, beat obviously, defective such as noise is big.

The purpose of this utility model just provide a kind of rotation flexibly, continuous pulsation-free improved type spherical universal castor rolls.

In order to achieve the above object, the technical scheme that the utility model is taked is: this improved type spherical universal castor comprises spherical roller and ball, it is characterized in that, it also comprises: bearing, be the cylindrical cap shape, outer top is vertically installing screw rod, the inner top surface of cap tube is a circular arc ball nest, with the vertical axis is the camber line two ends＞80 degree angles at center, the tangent exit skirt sample that is of bead line and end points, exit skirt lower edge suit toroidal frame, the toroidal frame inner ring is by having the bead returning groove of one slope shape on the ball nest bead, spreading ball in the nest, spherical roller is sleeved in the inner chamber of cap tube, is being shrouded by ball, the lower end of cap tube is set with locating bush, locating bush is an annular arrangement, and the annular groove that last outer is provided with convex edge and cap tube lower end inner face fastens, and the inwall after toroidal frame and the locating bush combination is Shape.

The utility model has the advantages that: simple in structure, cost is low, friction drag is little, rotation is flexible, stressed evenly, support firm, move lightly laborsaving, roll continuously steadily, nothing is beated, noise is little, not fragile, long service life.

Fig. 1 is the unitary construction cutaway view of this improved type spherical universal castor.

Fig. 2 is the parts dismission figure of Fig. 1.

Below in conjunction with accompanying drawing the utility model is done to describe in further detail.

In Fig. 1 and Fig. 2, the 1st, screw rod, it is vertically mounted on the top of bearing 2, in order to pass the reservation through hole on the carrier support body, so that force fastening connecing with nut, bearing 2 shapes such as cylindrical cap shape, cap tube inner top surface is a circular arc ball nest 11, is the camber line two-end-point＞80 degree angles at center with the vertical axis, bead 10 and the tangent bell mouth shape that is of end points, can improve time pearl effect of bead returning groove like this, make back the pearl smoothness.The exit skirt lower edge suit toroidal frame 4 of ball nest, the toroidal frame inner ring offers slope shape bead returning groove 9 one by on the pearl nest bead, ball 3 no fixs are laid in the ball nest, spherical roller 6 devices are in the inner chamber of cap tube, shrouding by the ball in the ball nest, the cambered surface of ball and top and the sphere of below are bearing fit, the lower end of cap tube entangles the location by locating bush 5, locating bush is annular, last outer is provided with convex edge 7, fasten with the annular groove 8 in the bearing 2, one side can hold out against toroidal frame 4 fixing, spherical roller 6 can be entangled to fall outward on the other hand.Inwall after toroidal frame 4 is assembled with locating bush 5 is

Shape, therefore, when spherical roller moves therein only with face friction, can not grind and scrape corner angle and produce and beat.When spherical roller rolls, all balls can both be done relative motion, the ball that successively rolls forward in the ball nest just enters looser bead returning groove continuously and moves backward, the spherical roller that is being rolled is again brought in the ball nest subsequently, finish the circulating rolling of ball in the ball nest, thus can be very like a cork, move to any direction reposefully with the weight that carries on the spherical universal castor.

But toroidal frame and bearing also integrated injection molding on technology; The inwall of locating bush and cap tube termination also method such as available ultrasonic welding is captiveed joint.

Claims

1, a kind of improved type spherical universal castor, it comprises spherical roller and ball, it is characterized in that, it also comprises: bearing (2), be the cylindrical cap shape, outer top is vertically installing screw rod (1), the inner top surface of cap tube is a circular arc ball nest (11), with the vertical axis is the camber line two ends＞80 degree angles at center, bead line (10) and the tangent exit skirt sample that is of end points, exit skirt lower edge suit toroidal frame (4), the toroidal frame inner ring is by having the bead returning groove (9) of one slope shape on the ball nest bead, spreading ball (3) in the nest, spherical roller (6) is sleeved in the inner chamber of cap tube, is being shrouded by ball (3), the lower end of cap tube is set with locating bush (5), locating bush is an annular arrangement, and the annular groove that last outer is provided with convex edge (7) and cap tube lower end inner face is interlocked, and toroidal frame and locating bush combination back inwall are Shape.