CN2505311Y

CN2505311Y - Simple castor

Info

Publication number: CN2505311Y
Application number: CN 01270616
Authority: CN
Inventors: 张一�
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-11-13
Filing date: 2001-11-13
Publication date: 2002-08-14
Anticipated expiration: 2011-11-13

Abstract

A simple castor comprises a trolley pedestal, a spherical trolley and a jacket, wherein, the top of the trolley pedestal is provided with a mounting part, the lower part is provided with an upper tee which is semi-circular concave; the upward side of the jacket is provided with an opening which is tabled and fixed with the opening at the downside of the trolley; the jacket is also provided with a lower tee which is corresponding to the upper tee and forms a tee with space beyond half of a hemispheroid; the bottom of the jacket is provided with a round orifice; the spherical trolley is arranged and can roll inside the round orifice; the inner perisporium of the tee is provided with a plurality of protrusion parts which make part contacts such points or small convexities with the spherical trolley, so that a gap is made between the trolley and the inner perisporium of the tee to facilitate the rolling of the trolley and play the role of bearing. The jacket can also have the function of eliminating the barriers on the road and preventing the hurt of man or objects. The castor has simple structure, low cost, easy installation and convenient use.

Description

Simple castor

Technical field

The utility model relates to a kind of castor, is meant especially to be used for suitcase, and bottoms such as furniture make its convenient a kind of Simple castor that moves.

Background technology

As is well known, be generally used for caster wheeles such as suitcase, chair, furniture and adopt cylindrical roller more.This roller is arranged on the roller pedestal rotationally by a horizontal shaft, also is provided with one on the roller pedestal and is the vertical axis of eccentric configuration with the roller center, and this vertical axis and horizontal shaft are perpendicular.The structure of this kind castor is complicated, and assembling is trouble, and cost is also higher.

Recently also occurred replacing the cylindrical roller caster wheel with the spheroid roller, for example apply for that No. 82212574 (announcing No. 220055) disclosed a kind of roller structure, it has the box-like wheel seat and is contained in spin (spheroid roller) in this wheel seat, spin is rotatably supported on the horizontal axostylus axostyle, be provided with two relative arc-shaped slots along level side at the wheel seat perisporium, horizontal axostylus axostyle can be done the rotation of certain angle along this arc-shaped slot.Apply for that the roller structure that No. 82216055 (announcing No. 22763) discloses is, the spheroid roller is still by horizontal axostylus axostyle supporting, but this horizontal axostylus axostyle is bearing on the bearing ring seat of along continuous straight runs rotation.Spheroid roller in above-mentioned two schemes all has horizontal axostylus axostyle.Apply for that No. 74201901 (announcing No. 82128) disclosed a kind of spheroid roller type castor that does not have horizontal shaft, its roller holds and is assembled in the assembly of being made up of wheel cap, pedestal, becket, pearl ring, guard ring and steel ball etc.It is similar with said structure to apply for that No. 7820182 (announcing No. 130578) discloses caster wheel, also adopts and does not have a spherical roller, and its roller is to be contained in the assembly that shape for hat housing, clamping ring, cheese pod and a plurality of steel ball form.Except roller and steel ball, other members all adopt metal sheet stamping to form in these two kinds of schemes because member is many and need a plurality of steel balls are arranged between roller and the wheel seat, during set-up cost and cost higher.

Technology contents

The purpose of this utility model is to provide a kind of simple structure, assembling Simple castor easy, with low cost.

The scheme that the utility model adopts is, this Simple castor comprises roller pedestal, spherical roller and a sheath, and an installation portion is arranged at the top of roller pedestal, and the bottom has the upper seat that is the semicircle spill; Sheath top is provided with opening, and its opening with the roller pedestal below is chimeric fixing, also is provided with on the sheath and the cooresponding bottom of upper seat ball seat, and its and upper seat form the space jointly and surpass ball seat more than the hemisphere, is provided with a roller hole bottom the sheath; Spherical roller rollably is arranged in the ball seat.

This scheme has only roller pedestal, spherical roller and three assemblies of sheath, and simple in structure, cost is lower, when being combined into castor, only needs spherical roller is inserted between the ball seat of upper and lower part, and with roller pedestal and fixing chimeric the getting final product of sheath, its assembling is easy then.

Description of drawings

Fig. 1 is the exploded perspective view of a kind of specific embodiment of the present utility model.

Fig. 2 is the part sectional view of the above-mentioned embodiment confined state of the utility model.

Fig. 3 and Fig. 4 are the local amplification view of two kinds of connection structures of roller pedestal and sheath.

Fig. 5,6,7,8 is several specific embodiment constructionals drawing of the installation portion of roller pedestal.

Fig. 9 and Figure 10 are the part sectional view of two kinds of specific embodiment of prominent pearl.

Figure 11 is the part sectional view of a kind of specific embodiment of sheath.

The specific embodiment

As shown in Figure 1 and Figure 2, castor described in the utility model is made of roller pedestal 1, sheath 2, spherical roller 3.Sheath 2 is entrenched in roller pedestal 1 bottom, and spherical roller 3 can roll and be contained in freely in the diameter of Spherical Volume that roller pedestal 1 and sheath 2 surrounded.

Roller pedestal 1 is a upper component, and an outstanding installation portion 11 is arranged at its top, and a upper seat 12 is arranged at the bottom, and this upper seat is a half-round recessed roughly, and upper seat 12 inner peripheral surfaces are formed with many smaller part globular process pearls 13, and prominent pearl 13 is preferably on average arranged.Installation portion 11 is a cylinder 15, which is provided with a ring-type locking protrusion 14.Corresponding with it, in suitcase, chair etc. is moved the cylindric runners or permanent seat 42 (shown in Fig. 2 long and two-short dash line) of thing 4 bottoms, should has the ring-type card that cooperates with ring-type locking protrusion 14 and end structure 41.Cylinder 15 can form round-ended cylinder body (as shown in phantom in Figure 2).

Sheath 2 is a columnar member, and its top peristome has fitting portion 21, and the lower opening place periphery of roller pedestal 1 has fitting portion 16, and by fitting

portion

21,16, sheath and roller pedestal are chimeric fixing.Sheath bottom inner peripheral surface forms and above-mentioned semi-circular upper portions ball seat 12 cooresponding bottom ball seats 22, and sheath bottom surface central authorities have a roller hole 23, can make spherical roller 3 parts expose sheath.The inner peripheral surface of bottom ball seat 22 also form with the set identical a plurality of prominent pearl 13 of upper seat 12 inner peripheral surfaces to support spherical roller 3.The bottom of sheath 2 also forms a skirt section 24 to strengthen roller 3 bearing forces and can get rid of ground obstacle.This skirt section also has the safety precaution effect, can prevent to weigh wounded people or thing.

Spherical roller 3 is contained between the upper and lower

part ball seat

12,22, and it is supported by prominent pearl 13, can freely roll towards any direction.Leave the free gap between roller 3 and upper and lower

part ball seat

12,22 inner peripheral surfaces.

For making sheath 2 can be rapidly chimeric fixing with roller pedestal 1 simply, two cooresponding

fitting portions

16 and 21 can adopt elasticity chimeric.Preferably as shown in Figure 3, be provided with the fastener 25 that utilizes concavo-convex mutual chimeric card to end in two fitting portions, 16,21 auxiliary sections, to prevent that sheath 2 from coming off from roller pedestal 1, above-mentioned fastener 25 can form ring-type or several sections circular-arc prominent bars by one of

fitting portion

16,21, and the opposing party forms the groove formation of correspondingly-shaped.Fig. 4 represents the another kind of connection mode of sheath 2 and pedestal 1, and in this structure, fitting portion 16 outer peripheral faces of pedestal 1 have outside thread, and fitting portion 21 inner peripheral surfaces of sheath 2 have corresponding negative thread, and both are by being threaded togather.

Be moved on the base of thing for whole castor is installed in suitcase, chair, dining car etc., the installation portion 11 of roller pedestal 1 also can adopt following structure except adopting aforesaid plug-in type cylinder.Fig. 5 represents that installation portion 11 forms bolt, Fig. 6 represents that installation portion 11 is for having the cylinder of stop ring groove 17 interior week, Fig. 7 represents that installation portion 11 is for having the tabular of screw hole 18, Fig. 8 represents that end face has the flat board of double faced adhesive tape belt 19, according to the design of needs that are moved thing and bottom, can select for use respectively.Above-mentioned installation portion 11 is an one with pedestal 1, and therefore, the member of whole castor has only three, simple structure, with low cost.

With roller pedestal 1, when sheath 2 and spherical roller 3 are assembled into castor, only need roller pedestal 1 is inverted, make its upper seat 12 upwards, again spherical roller 3 is placed in the upper seat 12, then with sheath 2 by fitting

portion

21,16 chimeric being fixed on the pedestal 1, can finish assembling.This erecting work process is simple, need not by any instrument.

For improving resistance to abrasion and the slyness of prominent pearl 13, the inner peripheral surface that contains the upper and lower

part ball seat

12,22 of prominent pearl 13 can be set up layer of metal film by the mode of vacuum evaporation.

Fig. 9 represents another embodiment partial enlarged drawing of the prominent pearl portion of supporting rollern 3.In this example, prominent pearl 13 is a steel ball 26, the inner peripheral surface of upper and lower part ball seat 12 and 22 (upper seat 12 only is shown among the figure) is provided with can accommodate steel ball depression over half 20, steel ball 26 embeds in the depression 20 rotationally, so, the bearing force of steel ball 26 and bearing application force can be bigger, played the bearing effect better, and just cost can increase to some extent.Figure 10 has represented the another kind of embodiment of prominent pearl portion, and it adopts several steel loops 27 to embed in ball seats in set several annular groove 10 that is parallel to each other, to replace above-mentioned prominent pearl 13 or steel ball 26.In addition, directly form the prominent bar of several ring-types at the ball seat inner face and also can obtain effect same to replace prominent pearl 13.

Skirt section 24 for sheath 2, structure shown in Figure 2 is applicable to that flat heap or translation are moved thing, if be used to be moved the thing pulling or when promoting and the situation of terrain slope, rod-pulling type suitcase etc. for example, corresponding variation should be done in the bottom in skirt section 24, to descend clipped corner as shown in figure 11, or do other variations.

Claims

1, a kind of Simple castor, comprise roller pedestal, spherical roller, it is characterized in that: this Simple castor also comprises a sheath, one installation portion is arranged at the top of roller pedestal, the bottom has the upper seat that is the semicircle spill, the sheath top is provided with an opening, the opening part of itself and roller pedestal below is chimeric fixing, also be provided with on the sheath and the cooresponding bottom of upper seat ball seat, itself and upper seat form the space jointly and surpass the above ball seat of hemisphere, spherical roller rollably is arranged in the ball seat, and the sheath bottom is provided with a circular hole.

2, Simple castor according to claim 1 is characterized in that: the ball seat internal perisporium is provided with the jut as the bearing that supports spherical roller.

3, Simple castor according to claim 2 is characterized in that: jut be a plurality of be the distribution shape and with the integrated hemispherical prominent pearl of ball seat.

4, Simple castor according to claim 2 is characterized in that: jut is a plurality of steel balls, and the ball seat internal perisporium is the distribution shape and is provided with a plurality of shrinkage pools, and each steel ball rollably embeds in this shrinkage pool.

5, Simple castor according to claim 2 is characterized in that: jut is the prominent bar of the integrated ring-type that is parallel to each other in the horizontal direction of multiple tracks and ball seat.

6, Simple castor according to claim 2 is characterized in that: jut is a plurality of steel loops, the parallel in the horizontal direction multiple tracks ring-type chase that is provided with of ball seat internal perisporium, and each steel loop embeds in this chase with a gap.

7, Simple castor according to claim 1, it is characterized in that: sheath is nested in roller pedestal, and it is a demountable structure.

8, Simple castor according to claim 7 is characterized in that: sheath has the skirt section of downward extension.