Laufrolle

Abstract

The invention relates to a roller for a roller guide, which is provided in particular in a vehicle seat substructure, comprising a first sub-element which comprises a rolling surface and a second sub-element which forms a receptacle for a bearing element, wherein the second sub-element has a first section which is at least partially enclosed by the first sub-element in such a way that there is a positive connection between the first sub-element and the second sub-element.

Description

[0001] The invention relates to a roller, in particular for a vehicle seat substructure, comprising a first sub-element which comprises a rolling surface and a second sub-element which forms a receptacle for a bearing element.

[0002] Vehicle seats, particularly for use in commercial vehicles, comprise a seat substructure located between a vehicle seat upper section and a vehicle seat lower section. Such a vehicle seat substructure can have a scissor-type frame. To enable movement during compression or rebound, the scissor-type frame generally comprises fixed bearings and floating bearings. Such a floating bearing further comprises a roller guide with corresponding rollers. These rollers are arranged on a bearing element or bearing pin and roll within a guide rail. The rollers should exhibit good rolling behavior and cause low friction losses.

[0003] Solid track rollers made of a single material are known in the art. However, since the material interacts with the track rail and has different requirements than the material interacts with the bearing element or bearing pin, a compromise must often be made in the choice of material to meet the conflicting requirements.

[0004] The object of the present invention is to provide a roller for a vehicle seat substructure or a vehicle seat which overcomes the above-mentioned disadvantages.

[0005] The object is achieved by a roller according to the present claim 1.

[0006] The core idea of ​​the invention is a roller, in particular for a vehicle seat substructure, comprising a first sub-element which comprises a rolling surface and a second sub-element which forms a receptacle for a bearing element, wherein the second sub-element has a first section which is at least partially enclosed by the first sub-element in such a way that there is a positive connection between the first sub-element and the second sub-element.

[0007] The roller according to the invention is preferably suitable and intended to be used in a roller guide or a loose bearing of a vehicle seat substructure.

[0008] The present invention makes it possible to optimize the first sub-element with respect to the requirements for good rolling behavior within the guide rail. Likewise, the second sub-element can be optimized with respect to its interaction with the bearing element, which can be, for example, a bearing pin. The positive connection between the first sub-element and the second sub-element provides a mechanically stable, uniform roller. For example, it is not necessary to provide additional connection types, such as a material connection, between the sub-elements.

[0009] According to a preferred embodiment, the first sub-element and the second sub-element are made of different materials. The material of the first sub-element is preferably selected such that it has a higher coefficient of friction than the material of the second sub-element. Such a coefficient of friction is also referred to as the friction value and is a parameter for the ratio of frictional force to contact pressure between two bodies. It is advantageous if the material of the first sub-element, comprising the rolling surface, has a high coefficient of friction. Such a high coefficient of friction ensures good rolling behavior, as sliding of the roller in the guide rail is reduced.

[0010] However, a low coefficient of friction is desirable for the second sub-element, since the second sub-element preferably rotates around the bearing element or bearing pin. The friction between the roller and the bearing element should be kept as low as possible to ensure smooth running of the roller.

[0011] Preferably, the two materials of the first sub-element and the second sub-element have different hardnesses. Preferably, the material of the second sub-element has a greater hardness than the material of the first sub-element. With such an advantageous configuration, the mechanical stability of the roller can be ensured essentially by the second sub-element.

[0012] According to a further preferred embodiment, the first sub-element and the second sub-element are made of different plastics. The roller is preferably manufactured using a multi-component injection molding process. Due to the positive locking according to the invention, a material-to-material connection between the two components during the injection molding process is not necessary to ensure the mechanical stability of the roller. Thus, the selection of plastics is not limited to those that form a material-to-material connection during injection molding.

[0013] According to a preferred embodiment, there is no material connection between the first sub-element and the second sub-element. However, the invention is not intended to be limited to the absence of such a material connection. Rather, it should be emphasized that, as a rule, there is no need for such a connection.

[0014] Thus, embodiments are also conceivable in which a material-to-material connection exists between the first sub-element and the second sub-element. A material-to-material connection can be formed, for example, by joining the materials during the injection molding process. However, a material-to-material connection can also be an adhesive connection or a welded connection.

[0015] An economical injection molding process requires the manufactured components to have the smallest possible constant wall thickness. To ensure high load-bearing capacity of the roller, it is advantageous to select the largest possible outer diameter. To minimize friction losses and ensure good rolling behavior, it is advantageous if the holder for the bearing element, or rather the bearing pin, and thus also the bearing element itself, has the smallest possible diameter. These requirements result in a large difference between the inner radius (radius of the holder) and the outer radius of the roller. Therefore, a component with a very thick wall must be manufactured using an injection molding process. However, this type of production requires long cycle times and is therefore economically disadvantageous.By designing the roller according to the invention with a first sub-element and a second sub-element, these two sub-elements can be configured such that their structures advantageously have a smaller, constant wall thickness. The production of the roller according to the invention thus requires shorter cycle times and is therefore more economical to manufacture.

[0016] Furthermore, it is possible to economically manufacture a roller with a larger roller diameter. A larger roller diameter results in improved rolling properties. The diameter of the roller (outer diameter) is preferably in a range between 27 mm and 33 mm, preferably in a range between 30 mm and 32 mm, and more preferably 31 mm. The diameter of the bearing element receptacle is preferably in a range between 11 mm and 14 mm, preferably in a range between 11 mm and 13 mm, and more preferably 12 mm.

[0017] Preferably, the first sub-element and the second sub-element have constant wall thicknesses and at the same time the roller has a diameter (outer diameter) in a range between 27 mm and 33 mm, preferably in a range between 30 mm and 32 mm, more preferably 31 mm.

[0018] The roller is preferably circular-cylindrical in shape. The roller thus advantageously extends along a radial axis (R) and a further extension along a vertical axis (H). The rolling surface extends along a circumferential direction (U) of the roller. The first sub-element is preferably located further outward along the radial axis (R) of the bearing roller than the second sub-element.

[0019] According to a further preferred embodiment, the roller comprises a central axis (M) extending along the vertical axis (H). Preferably, the roller has a radial cutting axis (S) extending along the radial axis (R). Preferably, the radial cutting axis (S) runs perpendicular to the central axis (M). Preferably, an intersection point of the radial cutting axis (S) and the central axis (M) lies at half the vertical extent of the roller along the vertical axis (H).

[0020] According to a further preferred embodiment, the second sub-element is designed symmetrically with respect to the radial section axis (S). Preferably, the first section of the second sub-element is designed symmetrically with respect to the radial section axis (S). Such a symmetrical design ensures balanced rolling behavior of the roller.

[0021] According to a further preferred embodiment, the second sub-element has a second section which is designed like a hollow cylinder. This second section preferably forms the receptacle for the bearing element or the bearing bolt. The bearing element can therefore advantageously be arranged in this receptacle. The receptacle is preferably designed as a through-bore extending along the vertical axis (H) in the hollow-cylindrical second section. Alternatively, however, the receptacle can also be a bore extending along the vertical axis (H) which is not entirely through. The second section preferably forms an inner surface which borders the receptacle or the bore along a circumferential direction (U) of the roller. This inner surface is preferably in contact with the bearing element. The roller advantageously rotates around a stationary bearing element.The lowest possible friction between the inner surface of the second section and the bearing element is therefore advantageous. However, this does not exclude embodiments in which a frictionally connected shaft-hub connection is provided between the roller, or the second sub-element of the roller, and the bearing element. For this purpose, the bearing element is usually mounted for rotation on another element.

[0022] According to a further preferred embodiment, the second section of the second sub-element has a height extension that essentially corresponds to the height extension of the roller. Thus, the second section of the second sub-element advantageously extends over the entire height of the roller.

[0023] According to a further preferred embodiment, the first section of the second sub-element has an outer sub-section extending along the circumferential direction (U) of the roller. This outer sub-section preferably comprises an upper surface extending substantially parallel to the rolling surface of the first sub-element. This upper surface is preferably arranged along the radial axis (R) of the roller closer to the central axis (M) of the roller than the rolling surface.

[0024] According to a further preferred embodiment, the outer subsection is essentially hollow-cylindrical. Preferably, the outer subsection has an extension along the vertical axis (H) of the roller that is smaller than the hollow extension of the roller. Advantageously, the first subelement at least partially, preferably entirely, encloses the outer subsection of the second subelement.

[0025] According to a further advantageous embodiment, the outer subsection is connected to the second section by means of a connecting subsection of the first section. The connecting subsection preferably extends along the radial axis (R). Advantageously, an extension of the connecting subsection along the height axis (H) is smaller than the extension of the outer subsection. The connecting subsection is preferably web-shaped. Preferably, the connecting subsection and the outer subsection are integral or formed as one piece. A one-piece design here and below means that all sections are manufactured from a single, uniform part.This is to be distinguished from a one-piece design, in which all sections are not made from a single and uniform part, but are not only firmly connected to one another, but are so closely connected that they do not appear as several components joined together and in any case cannot be separated from one another without destroying them.

[0026] According to a preferred embodiment, the connecting subsection and the outer subsection form the first section of the second subelement. This first section preferably has a substantially T-shaped cross-sectional area. The first section and the second section of the second subelement preferably form a substantially H-shaped cross-sectional area. Such a configuration ensures, on the one hand, mechanical stability of the roller through the first subelement and, on the other hand, the positive connection between the first subelement and the second subelement.

[0027] According to a further preferred embodiment, at least one intermediate subsection is arranged along the axis (R) between the outer subsection and the second section. The at least one intermediate subsection preferably has substantially the same design as the outer subsection. It is furthermore advantageous if the outer subsection is connected to the at least one intermediate section by means of a connecting subsection. The at least one intermediate subsection is preferably also connected to the second section of the second sub-element by means of a connecting section. The at least one intermediate subsection, the upper subsection and the at least one connecting subsection are preferably surrounded by the first sub-element.This creates a larger number of gaps, which are filled by the first sub-element, thus ensuring an improved form fit.

[0028] According to a further preferred embodiment, the first sub-element has a rolling section extending along the circumferential direction (U) of the roller, which comprises the rolling surface. Preferably, the rolling section is arranged at least partially on the upper surface of the first sub-section.

[0029] According to a further preferred embodiment, the first sub-element has at least one pair of engagement sections opposite one another along the vertical axis (H). The engagement sections of a pair are preferably separated from one another by a connecting sub-section of the second sub-element. Advantageously, one engagement section each lies along the radial axis (R) between the outer sub-section and the second section of the second sub-element, or between the outer sub-section and an intermediate sub-section, or between an intermediate sub-section and the second section of the second sub-element, or between two intermediate sub-sections.

[0030] Preferably, the second sub-element, or the first section of the second sub-element, comprises at least one connecting sub-section.

[0031] According to a further preferred embodiment, at least the rolling section, the engagement sections, and the outer subsection have a substantially equal wall thickness. Preferably, a wall thickness of the rolling section, the engagement sections, and the outer subsection extends along the radial axis (R) of the roller.

[0032] Preferably, at least the rolling section, the engagement sections, the outer subsection, and the at least one intermediate subsection have a substantially equal wall thickness. Preferably, a wall thickness of the rolling section, the engagement sections, the outer subsection, and the at least one intermediate subsection extends along the radial axis (R).

[0033] Preferably, at least the rolling section, the engagement sections, the outer subsection, and the at least one connecting subsection have substantially equal wall thicknesses. Preferably, a wall thickness of the rolling section, the engagement sections, the outer subsection, and the at least one intermediate subsection extends along the radial axis (R). Preferably, a wall thickness of the at least one connecting subsection extends along the height axis (H).

[0034] Preferably, at least the rolling section, the engagement sections, the outer subsection, the at least one intermediate subsection, and the at least one connecting subsection have substantially equal wall thicknesses. Preferably, a wall thickness of the rolling section, the engagement sections, the outer subsection, and the at least one intermediate subsection extends along the radial axis (R). Preferably, a wall thickness of the at least one connecting subsection extends along the height axis (H).

[0035] Due to the essentially identical wall thicknesses of the individual components of the roller, the cycle time in the injection molding process for producing the roller can be shortened or optimized. Instead of a solid roller as in the prior art, a roller can thus advantageously be produced that comprises multiple components, in the form of two sub-elements with a defined wall thickness.

[0036] According to a further preferred embodiment, the second section of the second sub-element has two opposite end regions along the height axis (H). Preferably, each of the end regions is stepped. Advantageously, the step is directed outward. The first sub-element preferably rests against the stepped end regions. Such a configuration improves the positive connection between the first sub-element and the second sub-element.

[0037] The present object is also achieved by a vehicle seat substructure with a roller guide comprising at least one roller according to at least one of the previously described embodiments. The vehicle seat substructure can be equipped with all of the features already described above in connection with the roller, individually or in combination with one another, and vice versa.

[0038] The present task is also solved by a vehicle seat with a vehicle seat substructure.

[0039] Further advantages, objects, and features of the present invention will become apparent from the following description of the accompanying figures. Similar components may have the same reference numerals in the various embodiments.

[0040] The figures show: Fig. 1 a perspective view of embodiments of the rollers; Fig. 2 a side view of embodiments of the rollers; Fig. 3 a sectional view along the section line BB of a roller from Fig. 2; Fig. 4 a sectional view along the section line CC of a roller from Fig. 2; Fig. 5 is a sectional view of a roller according to one embodiment; Fig. 6 is a sectional view of a roller according to an embodiment; Fig. 7 is a sectional view of a roller according to an embodiment; Fig. 8 is a sectional view of a roller according to an embodiment; Fig. 9 a perspective view of a vehicle underbody; Fig. 10 a front view of a vehicle underbody;

[0041] In the Fig. 1 to 8, a roller 1 is shown, in particular for a vehicle seat substructure (100). The roller 1 comprises a first sub-element 2, which comprises a rolling surface 3, and a second sub-element 4, which forms a receptacle 5 for a bearing element 102. The second sub-element 4 has a first section 6, which is at least partially enclosed by the first sub-element 2 in such a way that a positive connection exists between the first sub-element 2 and the second sub-element 4.

[0042] The first sub-element 2 and the second sub-element 4 are preferably made of different materials. The material of the first sub-element 2 advantageously has a high coefficient of friction to ensure good rolling behavior. The material of the second sub-element 4 preferably has a greater hardness to ensure the mechanical stability of the roller 1. Furthermore, the material of the second sub-element 4 has a lower coefficient of friction to minimize friction between the bearing element 102, in the form of a bearing pin, and the second sub-element. The bearing roller 1 is advantageously manufactured using a multi-component injection molding process.

[0043] In Fig. 1 shows a perspective top view of various embodiments of rollers 1. A corresponding side view of this roller 1 is shown in Fig. 2 can be seen.

[0044] The roller 1 is essentially designed as a circular cylinder. Thus, the roller 1 extends along a vertical axis H and along a radial axis R. Furthermore, a circumferential direction U is defined, which extends along the circumference of the circular base.

[0045] The roller 1 further comprises a central axis M which extends along a vertical axis H. Furthermore, a radial cutting axis S of the roller 1 can be defined which extends along the radial axis R of the roller 1. An intersection point SP of the radial cutting axis S and the central axis M lies at half the vertical extent of the roller 1. The radial cutting axis S is perpendicular to the central axis M. The first section 6 of the second sub-element 5 is formed symmetrically with respect to the radial cutting axis S.

[0046] The second subelement 4 has a second section 7, which is shaped like a hollow cylinder. The second section 7 thus comprises a bore, which serves as a receptacle 5 for the bearing element 102. The second section 7 comprises an inner surface 7a, which contacts the bearing element 102.

[0047] Furthermore, the second section of the second sub-element has a height extension that corresponds to the height extension of the roller 1. This means that the second section extends along the entire height of the roller 1.

[0048] Out of Fig. 1 shows that the roller 1 has two side surfaces 15. The two side surfaces 15 are opposite each other along the vertical axis H. Furthermore, the side surfaces 15 are each formed by an end face 7b of the second section 7 of the second sub-element 4 and by an end face 2a of the first sub-element 2. The respective end faces 7b, 2a abut one another and form a flat end face 15.

[0049] In the Fig. 3 to 8 show the structure of the roller 1. The Fig. 5 to 8 show in particular the structure of the second sub-element 4 and the encompassing first sub-element 2. In the Fig. 5, Fig. 6, Fig. 7, Fig. 8 shows the different designs of the second sub-element 4.

[0050] After each of the embodiments of the Fig. 5 to 8, the first section 6 of the second sub-element 4 comprises an outer sub-section 8 extending along a circumferential direction U of the roller 1. This sub-section 8 comprises an upper surface 9 extending substantially parallel to the rolling surface 3 of the first sub-element 2. Furthermore, the upper surface 9 is located closer to the central axis M of the roller 1 than the rolling surface 3 along the radial axis R of the roller 1.

[0051] The outer subsection 8 is essentially hollow-cylindrical and furthermore merges integrally into a connecting subsection 10. The outer subsection 8 has a substantially rectangular cross-sectional area. Furthermore, the outer subsection 8 has an extension along the vertical axis H of the roller 1 that is smaller than the vertical extension of the roller 1. The outer subsection 8 is arranged centrally in the roller 1 along the vertical axis H.

[0052] The connecting subsection 10 is also arranged centrally with respect to an extension of the roller 1 along the height axis H. Likewise, the connecting subsection 10 is arranged centrally on the outer subsection 8 along the height axis H. The outer subsection 8 and the connecting subsection 10 together have a substantially T-shaped cross-sectional area and are further arranged symmetrically to the radial section axis S. The first subelement 2 at least partially encloses the outer subsection 8. The first subelement 2 encloses the outer subsection 8 except for the area which merges into the connecting subsection 10.

[0053] According to the embodiments according to Fig. 5, Fig. 6 and Fig. 7, the connecting subsection 10 merges integrally into the second section of the second sub-element 4. The connecting subsection 10 thus connects the outer subsection 8 to the second section 7 and extends along the radial axis R of the roller 1. The roller 1 thus comprises at least one connecting subsection 11.

[0054] In Fig. 8 shows a further embodiment according to which at least one intermediate subsection 11 is arranged along the radial axis R of the roller 1 between the outer subsection 8 and the second section 7. According to this advantageous embodiment, two intermediate subsections 11 are provided. The intermediate subsections 11 are designed essentially the same as the outer subsection 8, i.e. they also have an essentially rectangular cross-sectional area and merge inwardly in the radial direction into a connecting subsection 10. The respective connecting subsection 10 extends along the radial axis R and is arranged centrally along the height axis H.

[0055] The intermediate subsections 11 have the same extension along the height axis H as the outer subsection 8 and are also arranged centrally with respect to the radial section axis S, analogous to the outer subsection 8. An intermediate subsection 11 and the connecting subsection 10 arranged thereon thus also have a substantially T-like cross-sectional area.

[0056] According to the embodiment according to Fig. 8, three connecting subsections are provided. A first connecting subsection 11 connects the outer subsection 8 to a first intermediate subsection 11. Another connecting subsection 11 connects the first intermediate subsection 11 to a second intermediate subsection 11. A third connecting subsection 10 connects the second intermediate subsection 11 to the second section 7, which is located radially furthest inside. This results in a structure with three adjacent T-shaped cross-sectional areas. This configuration results in gaps between the outer subsection 8 and the intermediate subsection 11, between the intermediate subsections and between the second section and the intermediate subsection 11. These gaps are filled by the first subelement 2.

[0057] The first sub-element 2 has a rolling section 12 extending along the circumferential direction U of the roller 1, which comprises the rolling surface 3. The rolling section 12 is arranged at least partially on the upper surface 9 of the first sub-section 8. In the Fig. 5 to 8 clearly show that the rolling section 12 extends along the vertical axis H beyond the outer subsection 8. The rolling section 12 merges into a side section 16 on each side of the roller 1. These side sections 16 comprise the side surfaces 15 or are bordered by the side surfaces 15. Starting from the side sections 16, at least one engagement section 13 extends on a respective side of the second sub-element 4. There is thus at least one pair of engagement sections 13, which are opposite one another along the vertical axis H and are separated from one another by a connecting subsection 10. The engagement sections 13 are arranged in the above-mentioned spaces.

[0058] After the design of the Fig. 5, Fig. 6 and Fig. 7 there is a pair of engagement sections 13. One engagement section 13 is therefore arranged on each side between the outer sub-section 8 and the second section 7.

[0059] According to the embodiment according to Fig. 8, an engagement portion 13 is arranged on each side between the outer subsection 8 and the first intermediate subsection 11. Another pair of engagement portions 13 is arranged between the first intermediate subsection 11 and the second intermediate subsection 11. Finally, a pair of engagement portions 13 is provided between the second intermediate subsection 11 and the second section 7.

[0060] The at least one pair of engagement sections 13, the rolling section 12, and the side section 16 form the first sub-element in one piece. Likewise, the first section 6, comprising the outer sub-section 8, at least one connecting sub-section 10, and the second section 7 form the second sub-element 4 in one piece. This is shown, for example, in the Fig. 3 and Fig. 4 can be seen.

[0061] According to the embodiment according to Fig. 7, the rolling section 12, the engagement sections 13, the outer sub-section 8, the connecting sub-section 11, the second section 7 and the side sections 16 have a substantially equal wall thickness, wherein the wall thicknesses of the rolling section 12, the engagement sections 13, the outer sub-section 8 and the second section 7 extend along the radial axis R. The wall thicknesses of the connecting sub-section 11 and the side sections 16 extend along the height axis H.

[0062] According to the embodiment according to Fig. 8, the rolling section 12, the engagement sections 13, the outer subsection 8, the connecting subsections 11, the intermediate subsections 11, the second section 7 and the side section 16 have a substantially equal wall thickness, wherein the wall thicknesses of the rolling section 12, the engagement sections 13, the outer subsection 8, the intermediate subsections 11 and the second section 7 extend along the radial axis R. The wall thicknesses of the connecting subsections 11 and the side sections 16 extend along the height axis H.

[0063] In the Fig. 5 and Fig. Figure 6 shows an embodiment in which the second section 7 of the second sub-element 4 has two opposite end regions 14 along the vertical axis H. Each of the end regions 14 is stepped. The respective step points outward. The first sub-element 2 or the side sections 16 rest against the stepped end regions 14. The two end regions 14 enclose a central section 17.

[0064] According to the embodiment according to Fig. 5, the rolling section 12, the engagement sections 13, the outer subsection 8, the connecting subsection 11, the central section 17 and the side sections 16 have a substantially equal wall thickness, wherein the wall thicknesses of the rolling section 12, the engagement sections 13, the outer subsection 8 and the central section 17 extend along the radial axis R. The wall thicknesses of the connecting subsection 11 and the side sections 16 extend along the height axis H.

[0065] As opposed to Fig. 5, the connection subsection 11 shows Fig. 6 has a greater wall thickness. This can be useful for greater load requirements. According to the embodiment according to Fig. 6, the rolling section 12, the engagement sections 13, the outer subsection 8, the central section 17 and the side sections 16 have a substantially equal wall thickness, wherein the wall thicknesses of the rolling section 12, the engagement sections 13, the outer subsection 8 and the central section 17 extend along the radial axis R. The wall thicknesses of the side sections 16 extend along the height axis H.

[0066] In the Fig. 9 and Fig. 10 shows a vehicle seat substructure 100. This extends along the vertical axis Z, a width axis Y, and a longitudinal axis X. The vehicle seat substructure 100 has a scissor-type frame 103, which connects a vehicle seat upper part to a vehicle seat lower part. The ends of the respective scissors of the scissor-type frame 103 are mounted by means of a fixed bearing 104 and a floating bearing 105 to ensure a rebound and compression movement. A floating bearing 105 comprises a roller guide 103. This roller guide 103 comprises a rail element 106, in which a roller 1 is arranged.

[0067] Fig.10 shows a bearing element 102 in the form of a bearing pin, which passes through the roller 1 and is connected to a guide element 107. The guide element 107 comprises a surface that runs diagonally relative to the width axis Y. The rail element 106 comprises a section that also runs diagonally relative to the width axis Y. The guide element 107 bears against this section in such a way that the roller 1 is pushed upward and can be picked up by an upper surface of the rail element 106.

[0068] All features disclosed in the application documents are claimed as essential to the invention, provided that they are new, individually or in combination, compared to the prior art. List of reference symbols 1 roller 2 first subelement 2a Front face of the first sub-element 3 Rolling surface 4 second sub-element 5 Recording 6 first section of the second sub-element 7 second section of the second sub-element 7a inner surface 7b Front face of the second sub-element 8 outer subsection of the second sub-element 9 upper surface of the outer subsection 10 Connecting subsection of the first section 11 Intermediate subsection 12 Roll-off section 13 Front wall 14 End areas of the second section 15 side surfaces 16 Side section of the first sub-element 17 Middle section 100 vehicle seat substructure 101 Roller guide 102 bearing element 103 Scissor frame 104 fixed bearings 105 loose bearings 106 rail element 107 Guide element H altitude axis M central axis S radial cutting axis SP Intersection point of the radial cutting axis and the central axis R radial axis U circumferential direction X Longitudinal axis of the vehicle seat substructure Y Width axis of the vehicle seat substructure Z Height axis of the vehicle seat substructure

Claims

[1] Castor (1), in particular for a vehicle seat substructure (100), comprising a first sub-element (2) which comprises a rolling surface (3) and a second sub-element (4) which forms a receptacle (5) for a bearing element (102), characterized by that the second sub-element (4) has a first section (6) which is at least partially enclosed by the first sub-element (2) in such a way that there is a positive connection between the first sub-element (2) and the second sub-element (4). [2] Roller (1) according to claim 1, characterized by that the first sub-element (2) and the second sub-element (4) consist of different materials, wherein the material of the first sub-element (2) is selected such that it has a higher coefficient of friction than the material of the second sub-element (4), wherein the roller (1) is produced by means of a multi-component injection molding process. [3] Roller (1) according to claim 1 or 2, characterized bythat the roller (1) comprises a central axis (M) which extends along a height axis (H), wherein the roller (1) has a radial cutting axis (S) which extends along a radial axis (R) of the roller (1), wherein an intersection point (SP) of the radial cutting axis (S) and the central axis (M) lies at half the height extent of the roller (1), wherein the first section (6) of the second partial element (5) is formed symmetrically with respect to the radial cutting axis (S). [4] Roller (1) according to one of the preceding claims, characterized by that the second sub-element (4) has a second section (7) which is designed like a hollow cylinder and forms the receptacle (5) for the bearing element (102), wherein the second section (7) of the second sub-element (4) has a vertical extent which essentially corresponds to the vertical extent of the roller (1). [5] Roller (1) according to one of the preceding claims, characterized by in that the first section (6) of the second sub-element (4) has an outer sub-section (8) extending along a circumferential direction (U) of the roller (1), which outer sub-section comprises an upper surface (9) which extends substantially parallel to the rolling surface (3) of the first sub-element (2) and is arranged along the radial axis (R) of the roller (1) closer to the central axis (M) of the roller (1) than the rolling surface (3), wherein the outer sub-section (8) is designed substantially like a hollow cylinder, wherein the outer sub-section (8) has an extension along the vertical axis (H) of the roller which is smaller than the vertical extension of the roller (1), wherein the first sub-element (2) at least partially encloses the outer sub-section (8). [6] Roller (1) according to claim 5 characterized bythat the outer sub-section (8) is connected to the second section (7) by means of a connecting sub-section (10) of the first section (6), wherein the connecting sub-section (10) extends along the radial axis (R) of the roller (1). [7] Roller (1) according to claim 5 characterized by that at least one intermediate subsection (11) is arranged along the radial axis (R) of the roller (1) between the outer subsection (8) and the second section (7), wherein the at least one intermediate subsection (11) has substantially the same design as the outer subsection (8), wherein the outer subsection (8) is connected to the at least one intermediate section (11) by means of a connecting subsection, wherein the at least one intermediate subsection (11) is connected to the second section (7) by means of a connecting section (10). [8] Roller (1) according to one of claims 6 or 7 characterized byin that the first sub-element (2) has a rolling section (12) extending along the circumferential direction (U) of the roller (1) and comprising the rolling surface (3), wherein the rolling section (12) is arranged at least partially on the upper surface (9) of the first sub-section (8), wherein the first sub-element (2) has at least one pair of engagement sections (13) opposite one another along the height axis (H), which are separated from one another by a connecting sub-section (10). [9] Roller (1) according to claim 8 characterized bythat at least the rolling section (12), the engagement sections (13), and the outer sub-section (8) have a substantially identical wall thickness, wherein at least the rolling section (12), the engagement sections (13), the outer sub-section (8) and the at least one intermediate sub-section (11) have a substantially identical wall thickness, wherein at least the rolling section (12), the engagement sections (13), the outer sub-section (8) and the at least one connecting sub-section (10) have a substantially identical wall thickness, wherein at least the rolling section (12), the engagement sections (13), the outer sub-section (8), the at least one intermediate sub-section (11) and the at least one connecting sub-section (10) have a substantially identical wall thickness. [10] Roller (1) according to one of claims 4 to 9 characterized bythat the second section (7) of the second sub-element (4) has two opposite end regions (14) along the height axis (H), each of the end regions (14) being designed in a step-like manner, the first sub-element (2) resting against the step-like end regions (14). [11] Vehicle seat substructure with a roller guide comprising at least one roller according to at least one of the preceding claims. [12] Vehicle seat with a vehicle seat substructure according to claim 11.

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