SE466538B - WHEELS CONSTRUCTION - Google Patents

Description

466 558 10 15 20 25 30 35 2 weaknesses mentioned above by achieving a friendly and radially stable wheel construction with a stable attachment of the wheel to the carriage, as well as there the side of the trolley becomes more accessible. Especially pronounced are these advantages in wheels with large diameters. IN The above purpose is achieved by the wheel construction according to the invention, they have in the appended claims specified characteristics.

The wheel construction according to the invention is distinguished thus essentially due to the fact that the wheel lacks a hub in normal sense. Instead, it is open in its center so that the trolley can be reached through the wheel. This has been achieved in that the wheel has a special structure, where the wheel outer ring cooperates with an inner ring, by means of roller bodies. The inner ring is not closed but is a segment ie an open ring, and is provided with a grip profile.

A side rail can be pushed together with this grip profile, and this side rail is so adapted that the wheel can be attached to the cart using it.

Inner ring and side strip can be made of spiral fl wound, extruded profiles, for example of aluminum nium. This means that the same profile can be used for many different wheel sizes and only the outer ring remains individual for each size. This means that for a new size or type of wheel requires only a new diameter meters of the mandrel around which the profiles are wound. Sidebar and inner ring usually has the same inner diameter, so that the common mandrel can be used. Especially for effect in short series, this leads to clear reductions of the manufacturing cost. Because the outer ring of the wheel and inner ring together have a greater radial extent than the sidebar, this is obscured from the side, and thus also the attachment of the wheel to the cart. This is done in part that the side of the trolley becomes accessible through the center of the wheel and partly that an interesting visual effect is created. The wheel will thereby obscure the carriage to an extremely small degree.

Because the wheel is attached to the stroller using the side rail 10 15 20 25 30 35 466 538 3 located near its outer periphery, an in- fortress in several places around the periphery, which creates an attachment that is very stable against breaks in the wheel. These accessibility and stability benefits are particularly pronounced for large wheels. A conventional one such a wheel covers a large area of the carriage side at the same time as it exposes its pivot to large loads.

A further advantage is that the wheel according to the invention can be attached in different places along its periphery and not just like a conventional wheel at its center.

This creates greater freedom in the design of the stroller.

Furthermore, different shoulder pin fittings do not need to be produced for each carriage, which usually has to be done then conventional wheels are used.

An important aspect of the invention is the wheel can serve as a handle for lifting or moving the trolley.

The grip is not disturbed by spokes or hubs as in a conventional wheel. Another great advantage is that you can grip parts that are fixed and do not rotate namely inner ring and side strip. Examples of applications wheelchairs where this is especially important are wheelchairs and unloading shelves for combined and smaller butions cars.

The wheel construction can also be so designed that the wheel also has a grip profile on its outside, ie the side furthest from the vertical side of the carriage. This external grip profile can either be on the profile from the beginning, for example by being included in die casting the tool. Or the external grip strip can be hand screwed on. In this outer grip strip can then an outer side strip is pushed in. In this outer sidebar can then accessories such as stands, fittings and / or handles is installed as the needs arise. Sidebar may also have recesses for a grip strip on both of its axial sides so that it can be surrounded by an inner ring on each side and thus of a wheel on each side. This 466 538 10 15 20 25 30 35 4 enables mounting of several wheels in width, ie placed axially next to each other. These wheels can also have different outer diameters because the outer ring has different thicknesses.

It is also possible that the inner rings are provided with screw holes so that two inner rings can be screwed together directly against each other each other. Thus, the outer rings will also be located immediately next to each other. They can have different sizes of outer- diameters, so that, for example, the larger wheel is used when driving on the floor while the smaller wheel can interact with rails that connect to the floor so that the trolley nom can easily be driven up a ramp with rails, which is above floor level.

The wheel is primarily developed for mobile interiors and the like, mainly for indoor use, and mainly especially for applications with low speeds and moderate stresses.

The wheel construction is such that extremely stable and stably attached wheels can be obtained. This is special important for a mobile preparation bench with a "chopping block" or for a workbench, which should respond well to blows and similar. Should roller bodies be damaged, it is possible opportunities for a reasonably handy amateur repairman to, by loosening the side screws locking screws and sliding this aside, to then replace roller elements. Further side moldings can be replaced or supplemented on a relatively easy way afterwards.

The applicants have also found that the availability of the margin is very limited for suitable wheels, especially for larger diameters. Relatively cheap wheel types, such as often has a hub bushing of a plastic material, has which rule poor stability and limited service life. More stable wheel types, such as wheelbarrows or bicycle wheels, have a significantly higher price. All those mentioned the wheel types require large axial width of the hub to provide reasonably acceptable stability. The wheel construction according to the present invention does not require this large axial width to provide good stability. It gives 10 15 20 25 30 35 466 538 I 5 also a simple and elegant attachment to the stroller.

The invention will be described in more detail below described by way of example with reference to attached drawing, on which the same numerals in the different figures, corresponding parts indicate each other.

Fig. 1 shows in perspective a barbecue cart.

Fig. 2 shows a vertical cross section through a of the carriage wheels and associated parts of the carriage.

Fig. 3 shows in perspective the outer ring of the wheel and a tube blank for the manufacture of the outer ring 3a. Further a cross section through the ring 3b is shown.

Fig. 4 shows in perspective a helically wound starting material for the inner ring, 4a, and a cross section through the inner ring, 4b.

Fig. 5 shows in perspective a helically wound starting material for the sidebar, Sa, and a cross section of 5b.

Fig. 6 shows a method of inserting the roller bodies the, between outer and inner ring, as well as other assembly of the wheel.

Fig. 7 shows another method of inserting the roller body. the pairs between outer ring and inner ring, 7a, and to mount together the wheel, 7b.

Figs. 8a and b show an assembled wheel, which also is equipped with a special bracket for attachment to the bottom of the carriage.

In Fig. 1, 2 denotes a barbecue cart with a standing catalytic gas grill on top. The trolley has drawers and folding doors, and can also be equipped with wine compartment. Related examples of carts are serving trolleys, furniture trolleys and trolleys for mobile work places.

The trolley is equipped with special "hubless" wheels, denoted by 1, which makes the carriage accessible through the wheel and creates an interesting visual effect.

Fig. 2 shows the structure of the wheel and its contents. attachment to the carriage. The wheel essentially consists of one outer ring 3, an inner ring 10 and a number of side strips 466 558 10 15 20 25 30 35 6 15. Furthermore, there are roller bodies 6 by means of which outer the ring is mounted rotatably relative to the inner ring, so that lateral forces can also be absorbed. The roller bodies can be balls, rollers or needles etc that run in one or several tracks, here two. Figures 3 and 4 show that the outer ring has two ball grooves radially inside 4 and 5 and that the inner ring is radially outer, at the peri- ferin 9, has two ball grooves 7, 8. Fig. 3 shows also that the outer ring can be manufactured by machining from a blank tube, where a plurality of rings are cut out. The material can be aluminum, steel or any other metal or plastic. Furthermore, the outer ring can be cast in metal or plastic, or made of another known material ways, for example by pressing. In these applications as a rule, unlubricated bearings can be used with roller bodies of, for example, so-called sub-plastic, cf. for example ball bearing blocks for sailboats.

Important features of the invention are that the inner ring 10 is intended to cooperate with a side strip 15 and that these two are not real rings but can be pushed together axially with each other. From Fig. 4 and 5 shows their cross-section and that they are made of spiral wrapped blanks. The production of the helical the substance can suitably be made by a profile of metal or plastic is wound on a calibration mandrel. In order to the elasticity of the material shall not affect the roundness of the substance and power accuracy is suitably made a heating, which adapted to the material used. The heating can take place after winding in the cold state or can be done on the profile before winding. Examples of useful material is aluminum or steel by extrusion to profile and plastic made by different methods.

The helical blank is then cut open so that circular rings comprising one revolution each are obtained, Such a ring with inner ring profile 10 can then be fed together with another ring with side rail profile 15 by 10 15 20 25 30 35 466 558 7 the two rings are twisted together by one from the inner one side 13 of the ring projecting gripping strip 14 penetrates into a corresponding recess 16 in the side bar 15. Here the grip strip 14 has been designed in the shape of a salmon tail, so that it radially outwards and inwards has two opposite conical surfaces that widen from the side 13. The recess 16 has corresponding shape so that it grips the "salmon tail" 14, and the conical surfaces are radially outward and inward parallel in the two parts. In order to facilitate the recess 16 is slightly more spacious than the "salmon tail" 14. To remove play between the parts, the side rail is 15 provided with threaded holes 17 in which locking screws are screwed i and then press the inner ring 10, so that the inner ring and side rails are pushed apart and their conical surfaces come in contact with each other. This is clear from Fig. 2.

Fig. 2 also shows how the wheel 1 is mounted to the trolley 2. Since the grip strip 14 goes around the whole the circumference of the inner ring 10, so can one or more pieces of the side rail 15 are applied so that they cover a smaller one part of the perimeter or covers the entire perimeter and different intermediate positions of course.

As shown in Fig. 2, the wheel is attached to the carriage by screwing screws 20 from the carriage side into the thread the holes 19 in the side list. At the top of the figure is a where two screws are screwed through the vertical of the carriage page 23 into the holes 19 and thus fasten the side strip and thus the wheel against the cart. In order for the wheel to be is firmly attached to the trolley, screwing on at least two places. The left wheel in Fig. 1 is screwed in this way to the vertical side of the trolley 23. Since the wheel itself completely obscures its attachment, to the trolley creates a visual effect where the wheel from the side seems to hang in the air.

The right wheel is attached to the trolley vertically downwards using a mounting bracket 21. This is in its screw screwed to the bottom 24 of the trolley using screws 22, as shown here dashed. In the same manner as 10 15 20 25 30 35 466 538 8 at the upper bracket the side strip 15 is pulled at the lower one fixed with screws 20, as shown here dashed. With fastening the console 21 comes from a large part of the load the wheel to be transferred directly to the bottom of the trolley, which can be advantageous especially with heavy wagons. Sam- early then the screws can be screwed in from the outside of the carriage.

With this as a background, it is appropriate to more in detail look at the actual assembly and filling of the wheel of roller bodies, as shown in Figures 6-8.

Fig. 6 shows a case where the helical blank for the inner ring 10 is not cut in the radial direction towards the center room but with a clear slope in relation to this direction. First, here are two sectors of the sidebar 15, an upper list sector 25 and a lower list sector 26 on the inner ring 10. As the arrows in the figure show, the the towers are pushed laterally around the inner ring. Then the inner ring with attached strip sectors can be inserted into the outer ring 3 and by means of external aids is held plan inside this. Then the lower, free, end of the inner ring is pressed radially inwards, so that an opening formed between the two ends. Through this opening can roller bodies are fed to the grooves in the inner and outer ring.

To facilitate this, mounting aids can be used turned, which holds roller bodies and feeds them correctly between the ends. When the tracks are filled with roller bodies, slide the upper strip sector to the left so that it covers over the joint. Then it is locked with the help of locking screws 18 which is drawn in the threaded holes 17, cf. Fig. 8. On the same way, the lower list sector is placed in the desired position and locked with screws.

Fig. 7 shows a slightly different method for imaging. of the rollers. Here has the helical substance for the inner ring 10 is cut so that after insertion into the outer the ring is missing a part. The distance that thereby exists between the two ends of the inner ring is then used to insert the roller bodies that way. When this is done, set a special filling part 27 in place instead of it 10 15 20 25 30 466 538 9 missing part. Then the upper list sector 25 is pushed in over the joint so that the two ends of the inner ring and the padding portion 27 is held in place. As in the previous In this case, the slip sector 25 is locked with locking screws 18 which are screwed down into the threaded holes 17. This is shown in Fig. 8. There also shows how the lower list sector 26, with help of fixing screws 20 which are screwed into the threaded holes 19, has been fitted with the mounting bracket 21.

The roller bodies could also be inserted through special recesses in the sides of the inner ring 10. These recesses should be able to be so shallow that they do not interfere with the normal work of the couple. It is also possible to after the insertion of the roller bodies clog these recesses by external means.

The construction means that the movement of the roller bodies to some extent will be disturbed by one or two joints of the inner ring 10. Therefore, these joints should be normal placed upwards, where the roller bodies are relieved.

Within the scope of the present invention, many can parts are designed differently than those shown in the figures.

For example, grip profile 14 and recess 16 can be provided in an amount different shapes. They can also be turned so that the recess is placed in the inner ring 10 and the protruding part is placed in the side strip 15. The outer ring 3 can have different section sections. height which is indicated by dashed lines in Fig. 3. Further the wheel can be provided with different types of dirt seals, and also seals to prevent lubricants from entering out. The side strip 15 can be provided with a seal, or a separate fastened seal is fastened using the grip profile 14. It there may also be a separate grip profile next to the profile 14 as well as separate profiles on the opposite side of the wheel.

It is also possible to cast in metal or plastic open inner rings or sectors with different angles extent of the sidebar.

Claims (7)

10 15 20 25 30 466 538 110 PATENT REQUIREMENTS Wheel (1), primarily intended for serving or grilling trolleys (2) and the like, wherein the outer part of the wheel is made of an outer ring (3), which has at least one outer groove (4, 5) open towards the center which is filled with roller bodies (6), which also cooperate with corresponding outwardly open inner grooves (7, 8) located in the periphery (9) of an inner ring (10), characterized in that the inner ring (10) consists of at least one circular segment ( 11), which on at least one side (12, 13), oriented substantially perpendicular to the periphery (9), is formed with at least one substantially continuous grip profile (14) as an outer side strip (15), also the circular segment-shaped, can be pushed together in its longitudinal direction so that the grip profile (14) and the side strip (15) are substantially firmly connected to each other in the axial direction of the wheel (1) and that at least one such circular segment-shaped side strip part (15) is adapted for attachment of the wheel (1) to the carriage (2) etc. Wheel according to claim 1, characterized in that a circular segment-shaped side strip part (15), which is pushed together with the circular segment (11), is then moved to a circumferential position where it runs over the joint between the two ends of the circular segment (11). , and possibly a filler part (27) placed between the ends, so that thereby both ends of the circle segment (11) are stabilized in relation to each other. Wheel according to claim 1 or 2, characterized in that the side strip (15) is provided with drilled and threaded holes (17), which pass through the strip in a direction substantially perpendicular to the curvature plane of the strip so that locking screws (18 ), after being screwed into the holes (17), hit the circle segment (11) and press the strip (15) from it as much as the grip profile (14) v) 10 15 20 25 30 466 538 11 and the side strip (15) allows and thereby the side strip (15) is locked in relation to the circle segment also in the peripheral joint at the same time as a play-free connection is established between the circle segment (11) and the side strip (15) and thus in mounted condition between the inner ring of the wheel (1) and the carriage (2). Wheel according to one of the preceding claims, characterized in that the gripping profile (14) is designed as a gripping strip (14) extending from and along the side surface (12, 13), which is thinner at its root near the side surface than longer out from the side surface and it cooperates with the side strip (15), which is provided with a recess (16) running in the longitudinal direction of the strip, which has a cross section corresponding to the grip strip (14). Wheel according to Claim 4, characterized in that the gripping strip (14) extends from its root and further out from the side surface (12, 13) substantially as much radially outwards as radially inwards, for example in T-shape or in the shape of a salmon tail. . Wheel according to one of the preceding claims, characterized in that the inner ring (10) is designed in a filling part corresponding to the shape of a circle segment (11) and an outlet (27), the distance between the ends of the segment the filling part (27) being used for to insert roller bodies to the grooves during assembly (4,5,7,8). Wheel according to one of the preceding claims, characterized in that the side strip (15) is provided with threaded holes (19), in which fastening screws (20) are screwed for fastening the wheel, for example to a carriage, where the fastening screws ( 20) goes from the vertical side (23) of the trolley or from the vertical side in a mounting bracket (21) and into the holes (19).