Caster for movable objects

Description

[0001] The invention relates to a roller for movable objects, in particular a bed roller, according to the generic part of the first claim.

[0002] German patent DE 102015 013 415 A1 discloses a roller for movable objects, in particular bed rollers, comprising at least a wheel, a fork accommodating the wheel, a guide tube pivotable relative to the fork via at least one bearing, locking means provided on the fork side, and a torsionally resistant braking system that can be brought into operative contact with the wheel. The braking system includes a substantially cylindrical, profiled locking element on one side, which can be brought into operative contact with a polygonal locking element on the fork side to form the torsion protection. Another roller is known from US patent US 10,486,466 B1.

[0003] The object of the invention is to provide an alternative anti-rotation device for rollers of various designs that differs from the prior art and is structurally simpler than the prior art.

[0004] This objective is achieved by a roller for movable objects, in particular a bed roller, comprising at least a wheel, a fork receiving the same, a guide tube which is pivotable relative to the fork via at least one bearing comprising an inner ring, locking means provided on the fork side, and a torsionally resistant braking system that can be brought into operative contact with the wheel, wherein the braking system comprises a brake shoe, a brake spindle, a guide pin, and a guide cup, wherein the guide pin is positioned within the guide tube and is movable in the axial direction via an eccentric provided in the area of ​​the guide tube, wherein the mutually facing end faces of the brake shoe on the one hand and the brake spindle on the other hand are provided with teeth,wherein the brake shoe can be brought into operative contact with the outer circumferential surface of the wheel and wherein the toothing of the brake spindle is movable in the axial direction relative to the toothing of the brake shoe, wherein the brake spindle has groove-shaped guides, the guide cup is provided with projections, wherein the projections can be brought into operative contact with the guides of the brake spindle to form the anti-rotation device, and wherein the guide cup is rigidly connected to the inner ring of the bearing. Advantageous embodiments of the invention are set forth in the dependent claims.

[0005] In contrast to the state of the art, an alternative anti-rotation device is thus provided, which is simple in design and can therefore be manufactured more cheaply.

[0006] The guide cup is preferably made of metal and is firmly connected to components of the bearing when assembled.

[0007] Advantageously, the guide cup is designed as a stamped and bent part.

[0008] Furthermore, it is proposed that the inner diameter of the guide cup be larger than the inner diameter of the bearing. The guide cup is firmly connected to the inner ring of the bearing, in particular by riveting.

[0009] The brake spindle should enclose the guide pin.

[0010] According to a further aspect of the invention, the opposing end faces of the brake shoe and the brake spindle are provided with teeth. The two teeth mesh with each other when the roller is braked.

[0011] The guide cup's projections remain in the groove-like guides of the brake spindle in every position of the roller (braked or unbraked), so that the anti-rotation feature is guaranteed in every operating state of the roller.

[0012] Furthermore, the guide pin should be positioned inside the guide tube and be movable in the axial direction via an eccentric provided in the area of ​​the guide tube, in order to be able to realize different operating states of the roller.

[0013] The invention is illustrated in the drawing using an exemplary embodiment and is described as follows. The drawing shows: Figure 1: Schematic diagram of a roll designed as a bed roll in various views; Figure 2: Detail view of the anti-rotation device of the roll according to Figure 1 Figure 3: Representation of the braking system in different views or sections; Figure 4: Alternative representation of the roller according to Figure 1 Figure 5: Component view of the brake system according to Figure 4 .

[0014] Figure 1The schematic diagram shows a roller 1 designed as a bed roller in various views and sections. The roller includes a wheel 2, a fork 3 that receives the wheel, and a guide tube 4 which is pivotally connected to the fork 3 via at least one bearing 5. A torsionally resistant braking system 6 is located on the fork side. Figure 2 will be described in more detail. Figure 1 A guide pin 7 is visible, which is operatively connected to an eccentric 8 in the upper region of the guide tube 4. The following components are also visible: a brake shoe 9, which can be brought into operative connection with the outer circumferential surface 10 of the wheel 2, a brake spindle 11, and a guide cup 12 made of metal. The upper end face 12a is firmly connected to the inner ring 5a of the bearing 5, in particular by riveting, with the inner diameter d1 of the guide cup 12 being larger than the inner diameter d of the bearing inner ring 5a.

[0015] Figure 2The figure shows, as a detailed view, the components of the anti-rotation device for the brake system 6. The guide pin 7, which is guided within the guide tube 4, is visible. Also shown are the brake shoe 9, the brake spindle 11, and the guide cup 12. The facing end faces 13, 14 of the brake spindle 11 and the brake shoe 9, respectively, are provided with radial teeth 15, 16. In the upper region 17 of the brake spindle 11, facing the guide cup 12, groove-like guides 18 are provided. Projections 19, pointing towards the upper region 17, are formed on the guide cup 12 and engage in the guides 18 of the brake spindle 11 to form the anti-rotation device for the brake system 6. The guide cup 12 is designed as a cylindrical metal part. In the assembled state, the projections 19 of the guide pot 12 engage in the groove-like guides 18 of the brake spindle 11 in every operating state of the roller 1.

[0016] Figure 3 shows role 1 according to Figure 1 with a braking system in its uppermost position. The projections 19 of the guide cup 12 rest in the guides 18 of the brake spindle 11. By actuating the eccentric 8, operating states of the roller 1, such as braked, unbraked, or pivotable, can be achieved. In Figure 3 The operating state is shown in which the fork 3 and thus the wheel 2 is pivotable relative to the guide tube 4.

[0017] Figures 4 to 6 show alternative schematic diagrams of a roll 1 designed as a bed roll in different views and sections.

[0018] Identical components are identified by the same reference numbers as in the Figures 1 to 3The following components are shown: roller 1, wheel 2, fork 3, guide tube 4, and a differently designed bearing 5. Also visible are the brake system 6, guide pin 7, eccentric 8, brake shoe 9, brake spindle 11, and guide cup 12. (In analogy to...) Figure 1 Here too, the inner diameter d 1 of the guide cup 12 is larger than the inner diameter d of the inner bearing ring 5a of the bearing 5.

[0019] Figure 5 The diagram shows the structural design of roller 1 as a detailed representation. The braking system 6 is, in analogy to Figure 2 , shown. The following components are recognizable: the guide pot 12, the projections 19 formed on the guide pot 12, the guide pin 7, the brake spindle 11 together with the groove-like guides 18 and the fork 3.

[0020] Also visible are the brake shoe 9, a brake shoe holder 20, and a lifting pot 21. In the mounted state of the roller, the brake shoe 9 is positioned rotationally fixed within the brake shoe holder 20, while the lifting pot 21 interacts with the guide pin 7. When the operating state of the roller, or of the brake system 6, changes, the lifting pot 21 actuates the brake shoe 9. The brake spindle 11 is provided with axially rotating teeth 15. The same applies to the brake shoe holder 20, where the teeth are indicated by reference numeral 16. In the operating state, the teeth 15 and 16 mesh, with the teeth 15 being axially movable relative to the teeth 16. Reference symbol list

[0021] 1 Roller 2 Wheel 3 Fork 4 Guide tube 5 Bearing 5a Inner bearing ring 6 Brake system 7 Guide pin 8 Eccentric 9 Brake shoe 10 Circumferential surface 11 Brake spindle 12 Guide pot 12a End face of guide pot 13 End face 14 End face 15 Toothing 16 Toothing 17 Upper area of ​​brake spindle 18 Brake spindle guide 19 Extensions 20 Brake shoe holder 21 Lifting pot d Diameter of inner bearing ring d 1 Diameter of guide pot

Claims

1. A caster for movable objects, in particular a bed caster (1), comprising at least a running wheel (2), a fork (3) for receiving the same, a guide tube (4), being pivotable relative to the fork (3) via at least one bearing (5), comprising an inner ring (5a), locking means provided on the fork, and a rotation-proof brake system (6) configured to be brought into operative connection with the running wheel (2), the brake system (6) comprising a brake shoe (9), a brake spindle (11), a guide pin (7) and a guide cup (12), wherein the guide pin (7) is positioned within the guide tube (4) and being movable in the axial direction via an eccentric (8), provided in the area of the guide tube (4), wherein the facing end faces (13, 14) of the brake shoe (9) on the one hand and the brake spindle (11) on the other hand are provided with a toothing (15, 16), wherein the brake shoe (9) can be brought into operative connection with the outer circumferential surface (10) of the running wheel (2), and wherein the toothing (15) of the brake spindle (11) is movable in the axial direction relative to the toothing (16) of the brake shoe (9), characterized in that the brake spindle (11) has nut-shaped guides (18), the guide cup (12) being provided with lugs (19), the lugs (19) being configured to be brought into operative connection with the guides (18) to form an anti-rotation lock, and wherein the guide cup (12) is fixedly connected with the inner ring (5a) of the bearing (5).

2. Caster according to claim 1, characterized in that the guide cup (12) is made of metal and, when assembled, is firmly connected, in particular riveted, to components of the bearing (5).

3. Caster according to claim 1 or 2, characterized in that the guide cup (12) is a stamped part.

4. Caster according to one of claims 1 to 3, characterized in that an inner diameter (di) of a lower portion of the guide cup (12) is larger than the inner diameter (d) of the bearing (5).

5. Caster according to one of claims 1 to 4, characterized in that the guide cup (12) is firmly riveted to the inner ring (5a) of the bearing (5).

6. Caster according to one of claims 1 to 5, characterized in that the brake spindle (11) encircles the guide pin (7).