GB2188685A

GB2188685A - Ball bearing housings for roller skates

Info

Publication number: GB2188685A
Application number: GB08708017A
Authority: GB
Inventors: Agustin Elorza Ruiz
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-04-03
Filing date: 1987-04-03
Publication date: 1987-10-07
Also published as: IT212750Z2; GB8708017D0; FR2596828A1; ES293348U; ES293348Y; IT8721316V0; DE3710954A1

Abstract

A stamped ball bearing housing for a roller skate roller 7 consists of a cup 1 which rotates with the roller skate roller and possesses a hole in the centre into which is inserted a tubular member 2 provided with a flange 3 that encloses the cup and a protruding extension sleeve 6 which is located on its front face at the roller transverse centre line 8, and in abutment with the tubular member belonging to the ball bearing at the opposite side. <IMAGE>

Description

GB2188685A 1

SPECIFICATION much greater than that of the bearing itself.

Additionally, even when this pressing process Ball bearing housing for roller skates were very carefully and accurately performed (which would involve a high cost), it could Among the kinds of rollers at present in com- 70 well bring about a narrowing of the ball hous mon use for application to roller skates is that ing, and hence the siezure of the bearing.

which consists of a molded synthetic material But even on the assumption that the press body with a hole in the centre for the axle ing process was successfully accomplished and a recess on either of its sides to accomfrom the technical point of view, the ball modate a small size ball bearing of some 22 75 housing could still suffer deformation and be mm in diameter and 5 or 6 mm. in width. come narrowed when the nuts on the ends of Bearings which up to now have been used the axle were tightened to secure the as in rollers of this kind are designed to have sembly after the two bearings had been two cups mounted in opposition to each other placed in their roller, and the roller on its rele upon a machined tubular member which cen- 80 vant axle. This is because such tightening ters upon the axis about which such rollers would be applied to the flanges of the tubular rotate and possesses an annular groove ma- members with the result that they would tend chined around it to act as path upon which to be brought together thus forcing the balls the balls run, these being housed inside the in the bearings against the bottoms of their space defined by said cups and said annular 85 respective cups inserted inside each of their groove. recesses in the rollers. The overall result When it is considered that each pair of would be that the bearings would sieze and skates is fitted with sixteen such ball bearings, be rendered incapable of fulfulling their pur the highly significant effect which the cost of pose.

these ball bearings has upon the total cost of 90 In view of the aforegoing difficulties, this the skates will be immediately appreciated. invention is of benefit because it provides a From this point of view, such ball bearings solution to overcome them in an extremely as are at present used involve costly machin- simple, economical and reliable manner ing and assembly operations. wherewith said tubular member is fitted with Moreover, the annular groove which needs 95 an extension sleeve so that when a roller is to be provided in order to prevent the cups equipped with its two ball bearings, the two with the balls from sliding along the tubular extension sleeves come into abutment with members means that there are many vibra- one another. This would prevent the bearings tions when in use, the skate runs more becoming siezed, because the pressure ex- slowly, and is more liable to suffer wear and 100 erted when the nuts on the roller axle are damage than it might otherwise be. tightened cannot exceed the amount which Another kind of ball bearing introduced brings about such abutment between said ex more recently is that which is comprised of a tension sleeves, and moreover its extent can cup produced from a stamping with a hole in be readily adjusted so as to ensure that the the centre, into which a tubular member, also 105 space housing the ball race is of exactly the produced from a stamping, is assembled. Said required dimensions.

tubular member terminates at one end in a Moreover, both the bearing cup as well as flange in such a manner that a housing to the tubular member can be produced entirely accommodate the balls is formed between this by the stamping process, since it is now no flange and the cup, whilst the opposite end of 110 longer necessaty to widen such tubular mem said tubular member is riveted to the cup im- ber with the resulting need to employ the mediately upon passing through the hole in costly pressing process, and this furthermore the cup centre in order to ensure there can be means it is no longer necessary to use such no movement in the axial direction. expensive and specialized machinery.

This kind of ball bearing, being constructed 115 This invention also provides for means from two stampings, would appear to com- which while preventing the bearing up from prise a cheap design as compared with the travelling axia lly with respect to the tubular other kind first described above, but this is member, nonetheless allow some resilient play only what it seems to be, as will now be- to absorb any axial forces.

come apparent. Moreover, said ball bearing is 120 Figure 1 depicts an axial cross section view not suitable in practice for ensuring efficient showing a roller skate roller (7) with its axle running of the roller, as will also now be (9) and its two ball bearings constructed in seen. accordance with the invention.

Indeed, in order for such roller bearing to be Figure 2 is an enlarged view of the area constructed, it requires the end of the tubular 125 encircled in Figure 1 where the design and member to be widened after it has been in- arrangement of the ball bearing covered by serted through the hole in the cup, but such the invention can be very clearly seen, as can widening of the tube end is not a simple task its actual assembly onto the roller skate roller to accomplish, and in any event involves a (7).

pressing process, the cost of which would be 130 In these Figures, the following parts may be 2 GB2188685A 2 seen: ciated with roller (7) axle (9), which is axially 1. Bearing cup. accommodated therein, and they are assem 2. Tubular member. bled with their respective extension sleeves 3. Flange on tubular member (2). (6) abutting one another. The assembly is 4. Hollow space. 70 completed with the inclusion of axle (9) to 5. Ball. gether with its washers (12) and nut (13).

6. Tubular member (2) extension sleeve. When nuts (13) are tightened as necessary to 7. Roller skate roller. secure the assembly, the force applied is obvi 8. Roller (7) centre line. ously counte racted by the mutual abutment 9. Roller (7) axle. 75 between extension sleeves (6) on tubular 10. Recess in roller (7). members (2) in such a way that no deforma 11. Axial hole through roller (7). tion occurs in hollow space (4) holding balls 12. Washer. (5), which will thus maintain its designed di 13. Nut. mensional stability to ensure proper running, 14. lock washer. 80 which comprises the chief characteristic of the The design covered by this invention is con- invention, unlike what occurs with known cerned with an improved arrangement for stamped ball bearings where the tightening stamped ball bearing housings for roller skates force was counteracted by the bottom of the which, as may be appreciated from Figure 2, bearing cup (1) seated against the bottom of is comprised of a bearing cup (1) possessing 85 recess (10) in roller (7), which causes such a hole in the centre to accommodate a tubular hollow space (4) for balls (5) to be throttled member (2) which is provided with a flange with the resulting siezure of the ball bearing.

(3) that almost totally covers the hole in bear- This basic characteristic of the invention is ing cup (1), with a hollow space (4) being completed with the provision of a lock washer defined between said flange (3) and bearing 90 (14) or similar device to ensure constant rela cup (4) to accommodate balls (5) whose travel tive positioning between the bearing cup (1) path is the curved surface produced from the and the tubular member (2), and at the same stamping process used in making the bearing time to allow a certain amount of resilient play cup (1) the flange (3) and the tubular member to absorb any axial forces.

(2). 95

Claims

It is as well to stress here that in practice it CLAIMS has been found

possible in the stamping pro- 1. An improved arrangement for stamped cess to produce curved surfaces which offer ball bearing housings for roller skates of the considerable improvements as ball race paths kind which consists of a cup which rotates compared to the annular recess in nonwith the roller skate roller and possesses a stamped ball bearings, and this is true to the hole in the centre into which is inserted a extent that ball bearings constructed in accor- tubular member provided with a flange that dance with this invention produce no apprecia- encloses the cup, characterized because said ble-vibrations and are faster than others. tubular member is axially lenthened by an ex- Tubular member (2) is furthermore provided 105tension sleeve which protrudes well proud of with an ample extention (6) which protrudes the bottom of the bearing cup, and where with respect to the bottom of bearing cup (1), such extension sleeve is capable, upon being and its size is exactly as required in order for assembled onto the roller skate roller, of hav its end to reach the roller skate roller (7) ing its front face located on the transverse centre line (8), which means in effect that 110 centre line of such roller, with such extension when the ball bearing is assembled upon such piece being provided moreover with means to roller (7), no siezure thereof will occur due to prevent any axial movement of the bearing narrowing of hollow space (4) accommodating cup with respect to such tubular member, all balls (5) when pressure is applied in assembl- in such a way that when the roller is assem- ing such roller (7) upon its axle (9) as will 115 bled with its two ball bearings in opposition now be seen. to one another, the front faces of said tubular As may be noted from Figure 1 which members are in abutment with each other shows a complete roller skate roller, each rolthus ensuring that when the means for attach ler (7) is fitted with a pair of ball bearings ing the roller into its axle are tightened, no such as that covered by this invention, these 120 siezure will occur in such ball bearings, at the each being housed in a recess (10) provided same time as the means for preventing the upon the sides of the roller (7) in such a bearing cup from moving axially ensure a pre manner that bearing cup (1) is securely fitted cision fit with no play in the ball race travel into such recess (10) and associated with the path.

motion of said roller (7). In turn, tubular mem- 125
2. An improved arrangement for stamped bers (2) belonging to such pair of roller bearball bearing housings for roller skates in full ings are accommodated inside an axial hole accordance with the preceding claim and char (11) in roller (7) which is open at either side acterized because said means for preventing thereof and joins one of said recesses (10) to the bearing cup from moving axially with re- the other. Such tubular members (2) are asso130 spect to said tubular member preferably con- 3 GB2188685A 3 sist of a resilient lock washer which is housed inside an annular groove formed in that section of the tubular member lying closest to the outside bottom of the bearing cup, thus pre- venting same from moving along the length of the tubular member, at the same time as allowing certain resilient play capable of absorbing axial forces.
3. An improved arrangement for stamped ball bearing housings for roller skates in full accordance with the preceding claims and characterized because the length of the tubular member extension sleeve is preferably egual to the axial dimension of the bearing cup.
4. A Ball bearing housing for roller skates substantially as herein described with reference to the accompanying drawings.
5. A ball bearing housing for roller skates comprising a pair of tubular means for receiv- ing a roller axle of said skates; and a respective cup means for rotation with the roller, said cup means being cooperable with outwardly extending flange on an outer end portion of each said tubular means to form a ball race therewith; and wherein said tubular means are of an axial length such that when assembled into said roller the inner ends of said tubular means abut one another to limit movement of said flanges towards the associ- ated cup means and prevent seizure of ball bearings in said races between said cup means and said flanges.

Printed for Her Majesty's Stationery Office by Burgess & Son (Abingdon) Ltd, Dd 8991685, 1987 Published at The Patent Office, 25 Southampton Buildings, London, WC2A 1 AY, from which copies may be obtained.