Conveyor arrangement and vehicle

Abstract

A conveyor arrangement (1, 1', 1”) is disclosed configured to move objects (8). The conveyor arrangement (1, 1', 1”) comprises a first endless track (t1, t1') comprising a plurality of rotatable members (r) forming engagement surfaces for the objects (8) being moved by the conveyor arrangement (1, 1', 1 "), wherein each of the plurality of rotatable members (r) is rotationally mounted on the first endless track (t1, t1') around a rotation axis (ax1) being parallel to a movement direction (md1, md2) of the first endless track (t1, t1'). The present disclosure further relates to a vehicle (2) comprising a conveyor arrangement (1, 1', 1”).

Description

The present disclosure relates to a conveyor arrangement configured to move objects. The present disclosure further relates to a vehicle comprising a conveyor arrangement.BACKGROUNDConveyor arrangements are devices configured to move objects from one location to another. Conveyor arrangements are mainly used in manufacturing, warehousing, and distribution to minimizing manual labour.Different types of conveyor arrangements are employed based on the specific needs of a task or environment. A common type of conveyor arrangement is the endless track conveyor, characterized by a continuous loop that carries objects along a fixed path. The continuous loop is normally formed by belts or chains and is driven by a motor to move along the fixed path.Endless track conveyors are commonly used in assembly lines, airport baggage handling systems, and automated sorting facilities because of their ability to maintain a continuous flow of materials. They are versatile in terms of customization, as they can be adapted to various lengths and widths, making them suitable for a wide range of applications. However, endless track conveyors have certain limitations. For example, their fixed path makes them suitable for moving objects along two defined opposite directions, but the fixed path of the endless track makes movement difficult in directions transversal to these two opposite directions.One solution to this limitation is to arrange groups of first endless tracks and groups of second endless tracks such that the second endless tracks are positioned perpendicular to the first endless tracks, and use a lifting mechanism, such as a pneumatic, hydraulic, or electric lifting mechanism, to vertically move the first and second endless tracks relative to each other. This setup allows objects to be moved in directions parallel to the first endless tracks by raising them above the second endless tracks, with the lifting mechanism, and operating the motors of the first endless tracks. Similarly, objects can be moved in directions parallel to the second endless tracks, and thus perpendicular to the first endless tracks, by raising the second endless tracks above the first endless tracks with the lifting mechanism, and activating the motors of the second endless tracks.However, such solution adds costs, complexity, and weight to the conveyor arrangement due to the required lifting mechanism. Moreover, it only allows for movement along straight lines determined by the extension directions of the first and second endless tracks. The necessary vertical movement of the first and / or second endless tracks can also add time to the overall operation. Time can be a critical issue in many applications. Additionally, in scenarios where heavy objects need to be moved by the conveyor arrangement, the lifting mechanism must be made sufficiently strong and robust to handle significant weights, further increasing the engineering, weight, and cost challenges associated with this approach. In addition, the lifting mechanism of a conveyor arrangement adds building height of the conveyor arrangement thereby limiting the potential storage space within a confined area.Omniwheel conveyor arrangements offer an alternative that provides great flexibility. These arrangements use wheels capable of rotating in multiple directions, enabling the movement of materials not just forwards and backward but also sideways. Omniwheel conveyors enhance workflow efficiency by reducing bottlenecks and allowing dynamic routing of objects.Despite their advantages, omniwheel conveyors also have some drawbacks. The complexity of their design and technology can result in higher initial costs compared to traditional conveyor systems. Moreover, in many configurations, an omniwheel conveyor requires a high number of motors, such as one motor per wheel or one motor for a small group of wheels, and these arrangements typically require complex control systems to operate effectively. Maintenance and repairs can also be more challenging, often requiring specialized knowledge and components, which can potentially lead to increased downtime if issues arise. Additionally, the relatively small contact areas between the wheels and the objects being moved may cause stability issues and could potentially damage objects, especially when transporting heavier or unevenly distributed loads.As indicated above, conveyor arrangements are commonly used in manufacturing, warehousing, and distribution. However, the trend towards automation has increased the demand for conveyor arrangements in the cargo compartments of vehicles. By arranging a conveyor arrangement within a cargo compartment of a vehicle, objects could be moved by the conveyor arrangement within the cargo compartment without requiring any manual labour or assistance. Such solutions could provide a vital link in fully automated logistics systems, including the use of autonomous vehicles.However, also in vehicle applications, it is advantageous if objects can be moved in more than two opposite directions to efficiently pack and unpack objects from the cargo compartment. Still, also in vehicle applications, it is an advantage if the conveyor arrangement is lightweight and non-complex so as to not add costs, complexity, and weight to the vehicle.SUMMARYIt is an object of the present invention to overcome, or at least alleviate, at least some of the above-mentioned problems and drawbacks. The object is achieved by the subject-matter of the appended independent claim(s).According to a first aspect of the present disclosure, the object is achieved by a conveyor arrangement configured to move objects, wherein the conveyor arrangement comprises a first endless track comprising a plurality of rotatable members forming engagement surfaces for the objects being moved by the conveyor arrangement, wherein each of the plurality of rotatable members is rotationally mounted on the first endless track around a rotation axis being parallel to a movement direction of the first endless track.Thereby, a conveyor arrangement is provided having conditions for being provided in a costefficient manner while allowing movement of objects being supported by the conveyor arrangement in directions transversal to the movement direction of the first endless track. This is because the first endless track comprises the plurality of rotatable members each being rotationally mounted on the first endless track around a rotation axis being parallel to a movement direction of the first endless track.Accordingly, in this manner, objects being supported by the conveyor arrangement can be moved in directions transversal to the movement direction of the first endless track, and thus transversal to an extension direction of the first endless track, by a second device, such as a second endless track transversally arranged relative to the first endless track, or by another type of device. As understood from the above described, the rotatable members currently engaging an object will rotate around their respective rotation axis upon movement of the object in directions transversal to the movement direction of the first endless track.Still, objects can be moved efficiently by the first endless track along the movement direction of the first endless track since the rotation axes of the rotatable members are parallel to the movement direction of the first endless track.Thus, due to the features of the conveyor arrangement, a light weighted and non-complex conveyor arrangement can be provided in a cost-efficient manner since it does not require a costly, heavy, space-demanding, and complex lifting mechanism, nor any advanced control system.Moreover, the conveyor arrangement can enhance the flexibility of movement of objects by allowing for multi-directional capabilities similar to omniwheel conveyors while at least substantially maintaining the simplicity, stability and reliability of endless track systems. Furthermore, the conveyor arrangement allows for smooth transitions between different movement paths without the need for extensive lifting mechanisms or complex control systems, thereby reducing costs, complexity, and maintenance challenges. In addition, the conveyor arrangement can minimize the time required for movement operations and can enhance the ability to handle heavy or unevenly distributed loads without compromising stability or damaging the objects being transported.Accordingly, a conveyor arrangement is provided overcoming, or at least alleviating, at least some of the above-mentioned problems and drawbacks. As a result, the above-mentioned object is achieved.Optionally, the first endless track comprises a first and a second track segment, a plurality of cross members connecting the first and second track segments, and member shafts each attached to two adjacent cross members of the plurality of cross members, and wherein each rotatable member of the plurality of rotatable members is rotationally arranged around a member shaft of the first endless track. Thereby, conditions are provided for a stable and robust conveyor arrangement while keeping manufacturing and assembly costs of the conveyor arrangement relatively low.Optionally, the member shafts are parallel to the movement direction of the first endless track. Thereby, a simple and robust conveyor arrangement can be provided capable of allowing for multi-directional movement capabilities of objects.Optionally, each of the first and a second track segments is formed as a chain or a belt. Thereby, a conveyor arrangement is provided having conditions for being manufactured and assembled in a cost-efficient manner while allowing for multi-directional movement capabilities of objects.Optionally, each rotatable member of the plurality of rotatable members is a roller. Thereby, conditions are provided for obtaining relatively large engagement surfaces between the first endless track and objects being moved by the conveyor arrangement while allowing for multidirectional movement capabilities of the objects in a simple and cost-efficient manner.Optionally, each rotatable member of the plurality of rotatable members is cylindrical.Thereby, relatively large engagement surfaces can be ensured between the first endless track and objects being moved by the conveyor arrangement while allowing for multidirectional movement capabilities of the objects in a simple and cost-efficient manner.Optionally, each rotatable member of the plurality of rotatable members is provided with a high friction rolling surface. Thereby, it can be ensured that objects do not slip relative to the conveyor arrangement in directions parallel to the movement direction, for example when being moved by the conveyor arrangement along the movement direction as well as when being stationary placed on the conveyor arrangement.Optionally, the high friction rolling surface is a patterned surface. Thereby, slippage of objects placed on the conveyor arrangement can be further avoided.Optionally, the conveyor arrangement comprises two or more first endless tracks being arranged parallel to each other. Thereby, stability issues and potential damage to objects can be avoided while allowing for multi-directional movement capabilities of the objects in a simple and cost-efficient manner. In addition, the conveyor arrangement can enhance the ability to handle heavy or unevenly distributed loads without compromising stability or damaging the objects being transported.Optionally, the conveyor arrangement comprises a second endless track comprising a plurality of rotatable members arranged to form engagement surfaces for the objects being moved by the conveyor arrangement, wherein each of the plurality of rotatable members is rotationally mounted on the second endless track around a rotation axis being parallel to a movement direction of the second endless track, and wherein the second endless track is arranged perpendicular to the first endless track. Thereby, a conveyor arrangement is provided capable of moving objects along four or more different directions while having conditions for being lightweight, non-complex, and cost-efficient. In other words, a conveyor arrangement is provided having multi-directional movement capabilities of the objects while circumventing need for a lifting mechanism configured to adjust the relative vertical orientation of the first and second endless tracks. Instead, since the second endless track is arranged perpendicular to the first endless track, an operation of the second endless track will cause objects to move along the movement direction thereof while the engagement between the objects and the rotatable members of the first endless track will cause rotation of these rotatable members around their respective rotation axis. Similarly, an operation of the first endless track will cause objects to move along the movement direction thereof while the engagement between the objects and the rotatable members of the second endless track will cause rotation of these rotatable members around their respective rotation axis.Furthermore, by circumventing the need for a lifting mechanism, the conveyor arrangement becomes less space-demanding, potentially increasing available storage space within confined areas, while still providing multi-directional movement capabilities for the objects. In addition, the conveyor arrangement can minimize the time required for movement operations and can enhance the ability to handle heavy or unevenly distributed loads without compromising stability or damaging the objects being transported.Optionally, the conveyor arrangement comprises two or more second endless tracks arranged parallel to each other. Thereby, stability issues and potential damage to objects can be avoided while allowing for multi-directional movement capabilities of the objects in a simple and cost-efficient manner. In addition, the conveyor arrangement can enhance the ability to handle heavy or unevenly distributed loads without compromising stability or damaging the objects being transported.According to a second aspect of the present disclosure, the object is achieved by a vehicle comprising a cargo compartment and a conveyor arrangement according to the first aspect of the present disclosure, wherein the conveyor arrangement is arranged inside the cargo compartment of the vehicle.Thereby, a vehicle is provided comprising a conveyor arrangement having conditions for being lightweight, non-complex, and cost-efficient while allowing for multi-directional movement capabilities of objects within the cargo compartment.Moreover, since the conveyor arrangement arranged inside the cargo compartment does not require a space-demanding lifting mechanism, the available space within the cargo compartment can be utilized in an efficient manner, which potentially can provide more storage space for objects therein.Accordingly, a vehicle is provided overcoming, or at least alleviating, at least some of the above-mentioned problems and drawbacks. As a result, the above-mentioned object is achieved.Optionally, the vehicle is a heavy vehicle, such as a truck. Thereby, a heavy vehicle is provided having at least some of the above-mentioned advantages.It will be appreciated that the various embodiments described for the method are all combinable with the control arrangement as described herein. That is, the control arrangement according to the fourth aspect of the invention may be configured to perform any one of the method steps of the method according to the first aspect of the invention.Further features of, and advantages with, the present invention will become apparent when studying the appended claims and the following detailed description.BRIEF DESCRIPTION OF THE DRAWINGSVarious aspects of the present disclosure, including its particular features and advantages, will be readily understood from the example embodiments discussed in the following detailed description and the accompanying drawings, in which:Fig. 1 schematically illustrates a vehicle according to some embodiments,Fig. 2 illustrates a perspective view of a conveyor arrangement according to some embodiments,Fig. 3 illustrates a cross section of the conveyor arrangement according to the embodiments illustrated in Fig. 2,Fig. 4 illustrates a perspective view of a portion of a first endless track of the conveyor arrangement illustrated in Fig. 2 and Fig. 3,Fig. 5 illustrates a top view of the portion of the first endless track illustrated in Fig. 4, Fig. 6 illustrates a top view of a conveyor arrangement according to some further embodiments, andFig. 7 illustrated a perspective view of a conveyor arrangement according to yet further embodiments.DETAILED DESCRIPTIONAspects of the present disclosure will now be described more fully. Like reference signs refer to like elements throughout. Well-known functions or constructions will not necessarily be described in detail for brevity and / or clarity.Fig. 1 schematically illustrates a vehicle 2 according to some embodiments. According to the illustrated embodiments, the vehicle 2 comprises a tractor unit 2’ and a trailer 20. The vehicle 2 comprises a coupling assembly 50 for coupling the trailer 20 to the tractor unit 2’. In Fig. 1, the trailer 20 is coupled to the tractor unit 2’ via the coupling assembly 50.Accordingly, in the embodiments depicted in Fig. 1, the vehicle 2 is a truck, i.e., a type of heavy road vehicle, as well as a type of heavy commercial vehicle. According to further embodiments, the vehicle 2, as referred to herein, may be another type of heavy or lighter type of manned or unmanned vehicle for land- or water-based propulsion such as a lorry, a construction vehicle, a tractor, a boat, a ship, or the like.The vehicle 2 comprises a propulsion system 14 configured to provide motive power to the vehicle 2 via wheels 27’ of the vehicle 2. The propulsion system 14 may comprise an electric propulsion machine and / or an internal combustion engine for providing motive power to the vehicle 2.In Fig. 1, the vehicle 2 is illustrated as positioned in a use position on a flat horizontal surface 51 supporting the vehicle 2. The use position of the vehicle 2 may also be referred to as an intended use position. As seen in Fig. 1, the wheels 27, 27’, 29 of the vehicle 2 abut against the flat horizontal surface 51 when the vehicle 2 is positioned in the use position thereon. That is, in more detail, in the embodiments depicted in Fig. 1, the wheels 27, 27’ of the tractor unit 2’, as well as the wheels 29 of the trailer 20, abut against the flat horizontal surface 51 when the vehicle 2 is positioned in the use position thereon.Due to the engagement between the trailer 20 and the tractor unit 2’ at the coupling assembly 50, the trailer 20 is at least partially supported relative to the horizontal surface 51 via wheels 27, 27’ of the tractor unit 2’ when the trailer 20 is coupled to the tractor unit 2’ via the coupling assembly 50. Moreover, as seen in Fig. 1, a leg of a trailer jack assembly 31 has been lifted since it is not needed for supporting the trailer 20 relative to the horizontal surface 51 when the trailer 20 is coupled to the tractor unit 2’ via the coupling assembly 50.In Fig. 1, a forward moving direction fd and a reverse moving direction rd of the vehicle 2 are indicated. The reverse moving direction rd is opposite to the forward moving direction fd. Moreover, in Fig. 1, a longitudinal direction Id1 of the vehicle 2 is indicated. The longitudinal direction Id 1 of the vehicle 2 is parallel to a flat horizontal surface 51 supporting the vehicle 2 when the vehicle 2 is positioned in the use position thereon. Moreover, the longitudinal direction Id1 of the vehicle 2 is parallel to the forward moving direction fd of the vehicle 2 as well as to the reverse moving direction rd of the vehicle 2.Furthermore, in Fig. 1, a vertical direction vd of the vehicle 2 is indicated. The vertical direction vd of the vehicle 2 is perpendicular to the longitudinal direction Id1 of the vehicle 2. Moreover, when the vehicle 2 is positioned in the use position on a flat horizontal surface 51, the vertical direction vd of the vehicle 2 coincides with a gravity vector gv at the location of the vehicle 2. Moreover, the vehicle 2 has a lateral direction. The lateral direction of the vehicle 2 is perpendicular to the longitudinal direction Id1 of the vehicle 2 as well as to the vertical direction vd of the vehicle 2.As indicated in Fig. 1, the vehicle 2 comprises a cargo compartment 6. According to the embodiments illustrated in Fig. 1, the cargo compartment 6 is part of the trailer 20. However, according to further embodiments, the cargo compartment 6, as referred to herein, may be part of another unit of the vehicle 2. As an example, according to further embodiments, the vehicle 2, as referred to herein, may be a truck with a cargo compartment unit rigidly attached to a frame of the truck. Obviously, in such embodiments, the cargo compartment 6, as referred to herein, is part of the cargo compartment unit.As indicated in Fig. 1, the vehicle 2 comprises a conveyor arrangement 1, 1', 1” arranged inside the cargo compartment 6 of the vehicle 2.Fig. 2 illustrates a perspective view of a conveyor arrangement 1 according to some embodiments. As is further explained herein, the conveyor arrangement 1 is configured to move objects along two opposite movement directions md1, md2. In some places herein, these movement directions md1, md2 are referred to as a first movement direction md1 and a second movement direction md2. Obviously, the fact that the movement directions md1, md2 are opposite means that the second movement direction md2 is opposite to the first movement direction md1.The conveyor arrangement 1 comprises a first endless track t1. As is further explained in detail below, the first endless track t1 comprises a plurality of rotatable members r forming engagement surfaces for the objects being moved by the conveyor arrangement 1.Fig. 3 illustrates a cross section of the conveyor arrangement 1 according to the embodiments illustrated in Fig. 2. In Fig. 3, the cross section is made in a plane P1 being parallel to the first and second movement directions md1, md2 of the conveyor arrangement 1.Moreover, in Fig. 3, a vertical direction vd’ of the conveyor arrangement 1 is indicated.Furthermore, in Fig. 3, as well as in Fig. 2, a vertical direction vd of the vehicle 2 is indicated. Below, simultaneous reference is made to Fig. 1 - Fig. 3, if not indicated otherwise.The conveyor arrangement 1 is configured to be positioned in the cargo compartment 6 of the vehicle 2 such that the vertical direction vd’ of the conveyor arrangement 1 coincides with the vertical direction vd of the vehicle 2. In Fig. 3, the plane P1 is parallel to the vertical direction vd’ of the conveyor arrangement 1. Therefore, the plane P1 may also be referred to as a vertical plane P1 of the conveyor arrangement 1. As understood from the above described, the conveyor arrangement 1 is configured to be positioned in the cargo compartment 6 of the vehicle 2 such that the vertical plane P1 of the conveyor arrangement 1 coincides with the vertical direction vd of the vehicle 2.As can be seen in Fig. 3, the conveyor arrangement 1 comprises a first sprocket 11, a second sprocket 12, and a tensioning sprocket 13, each engaging the first endless track t1. Moreover, each of the first sprocket 11, second sprocket 12, and tensioning sprocket 13, is rotationally arranged around a rotation axis being parallel to the vertical plane P1 of the conveyor arrangement 1. The rotation axes of the first sprocket 11, the second sprocket 12, and the tensioning sprocket 13 have not been provided with reference signs in Fig. 3 for reasons of brevity and clarity.The tensioning sprocket 13 is configured to maintain or adjust the tension of the first endless track t1 around the first and second sprockets 11, 12. According to further embodiments, the conveyor arrangement 1 may lack the tensioning sprocket 13. Instead, in such embodiments, the tension of the first endless track t1 around the first and second sprockets 11, 12 may be adjusted by adjusting a relative distance between the first and second sprockets 11, 12, and / or may be maintained by ensuring that a certain separating force is applied between the first and second sprockets 11, 12, for example by implementing a spring mechanism configured to apply a separating force between the first and second sprockets 11, 12.The first endless track t1 is formed as a continous loop over at least the first and second sprockets 11, 12. As is further explained herein, the conveyor arrangement 1 may comprise a motor configured to rotate one of the first and second sprockets 11, 12, and the tensioning sprocket 13, so as to move the first endless track t1 around the first and second sprockets 11, 12. The sprocket 11, 12, 13 among the first and second sprockets 11, 12 and the tensioning sprocket 13 being driven by the motor may also be referred to as a driving sprocket, whereas the remaining sprockets 11, 12, 13 of the first and second sprockets 11, 12 and the tensioning sprocket 13, may be referred to as a follower sprocket. Thus, in some embodiments, the tensioning sprocket 13 may be used as a driving sprocket. According to such embodiments, the tensioning sprocket 13 may also be referred to as a combined tensioning / driving sprocket.According to further embodiments, the conveyor arrangement 1 may comprise one or more other types of guiding, driving, and tensioning members than sprockets 11, 12, 13, such as for example pulleys, wheels, tensioning arms, and the like.In Fig. 2 and Fig. 3, a frame structure 15 of the conveyor arrangement 1 is indicated. As understood from the above described, each of the first and second sprockets 11, 12 and the tensioning sprocket 13 is rotationally arranged to the frame structure 15. When being powered to move, the first endless track t1 moves relative to the frame structure 15 along a movement path defined by the sprockets 11, 12, 13, and the tensioning of the first endless track t1. The movement path of the first endless track t1 extends in a movement plane that is parallel to the vertical plane P1 of the conveyor arrangement 1. Therefore, the plane P1 indicated in Fig. 3 may also be referred to as a movement plane of the first endless track t1.In Fig. 3, an extension direction ed of the first endless track t1 is indicated. The extension direction ed of the first endless track t1 is parallel to each of the first and second movement directions md1, md2 of the first endless track t1, and the vertical plane P1 of the conveyor arrangement 1.In Fig. 3, an upper side 17 and a lower side 19 of the conveyor arrangement 1 is indicated. The conveyor arrangement 1 is configured to be positioned on a supporting surface, such as a floor surface of a cargo compartment 6 of a vehicle 2, such that the lower side 19 of the conveyor arrangement 1 abuts against the support surface. The conveyor arrangement 1 is configured to move objects along the upper side 17 thereof.As mentioned above, the first endless track t1 comprises a plurality of rotatable members r forming engagement surfaces for the objects being moved by the conveyor arrangement 1. This means that each rotatable member r, of the plurality of rotatable members r, forms an engagement surface for moving objects at the upper side 17 of the conveyor arrangement 1.As is best seen in Fig. 3, according to the illustrated embodiments, the rotatable members r of the plurality of rotatable members r currently being located at the upper side 17 of the conveyor arrangement 1 protrudes further out from the conveyor arrangement 1 than surrounding surfaces of the frame structure 15. Accordingly, the rotatable members r of the plurality of rotatable members r currently being located at the upper side 17 of the conveyor arrangement 1 can abut against objects being located thereon to form engagement surfaces for moving the objects.According to embodiments herein, each of the plurality of rotatable members r is rotationally mounted on the first endless track t1 around a rotation axis ax1 being parallel to a movement direction md1, md2 of the first endless track t1.In this manner, a conveyor arrangement 1 is provided having conditions for being provided in a cost-efficient manner while allowing movement of objects being supported by the conveyor arrangement 1 in directions transversal to the first and second movement directions md1, md2 of the first endless track t1. Thus, in this manner, objects being supported by the conveyor arrangement 1 can be moved in directions transversal to the first and second movement directions md1, md2 of the first endless track t1, and thus transversal to an extension direction ed of the first endless track t1, by a second device, such as a second endless track transversally arranged relative to the first endless track, or by another type of device. As understood from the above described, the rotatable members r among the plurality of rotatable members r currently engaging an object will rotate around their respective rotation axis ax1 upon movement of the object in directions transversal to the first and second movement directions md1, md2 of the first endless track t1.Similarly, since the rotation axes ax1 are parallel to the first and second movement directions md1, md2 of the first endless track t1, the objects can be efficiently moved by the first endless track t1 along the first and second movement directions md1, md2 of the first endless track t1.Thus, due to these features of the conveyor arrangement 1, a light-weighted and noncomplex conveyor arrangement 1 can be provided in a cost-efficient manner since it does not require a costly, heavy, space-demanding, and complex lifting mechanism, nor any advanced control system, as is further explained herein.According to the illustrated embodiments, each of the plurality of rotatable members r is rotationally mounted on the first endless track t1 around a respective rotation axis ax1, and is free to rotate in both rotational directions around its rotation axis ax1 by an external torque or force being applied to the rotatable member r. Accordingly, the rotatable members r are not connected to a motor, or any other type of device, for causing rotation of the rotatable members r around the respective rotation axis ax1. Instead, the rotatable members r are free to rotate around the rotation axes ax1 when subjected to an external torque or force, as explained above.Fig. 4 illustrates a perspective view of a portion of the first endless track t1 of the conveyor arrangement 1 illustrated in Fig. 2 and Fig. 3.As can be seen in Fig. 4, and as is also indicated in Fig. 2, the first endless track t1 comprises a first and a second track segment s1, s2. According to the illustrated embodiments, each of the first and the second track segments s1, s2 is formed a belt.According to further embodiments, of the first and the second track segments s1, s2 may be formed as a belt-like member, a chain, or a chain-like member.Fig. 5 illustrates a top view of the portion of the first endless track t1 illustrated in Fig. 4. Below, simultaneous reference is made to Fig. 1 - Fig. 5, if not indicated otherwise.According to the illustrated embodiments, the first endless track t1 comprises a plurality of cross members 3 each connecting the first and second track segments s1, s2. Moreover, the first endless track t1 comprises a plurality of member shafts 5 each attached to two adjacent cross members 3 of the plurality of cross members 3. According to the embodiments illustrated in Fig. 2 - Fig. 3, the conveyor arrangement 1 is configured such that each cross member 3 of the plurality of cross members 3 is attached to a member shaft 5. According to further embodiments, the first endless track t1 may be configured differently. For example, one or two cross members 3 and a member shaft 5, as referred to herein, may be formed as a single part from continuous material.The member shafts 5 are parallel to the first and second movement directions md1, md2 of the first endless track t1, t1'. According to the illustrated embodiments, each rotatable member r of the plurality of rotatable members r is rotationally arranged around a member shaft 5 of the first endless track t1, t1’. Thereby, a stable and robust conveyor arrangement 1 can be provided while keeping manufacturing and assembly costs of the conveyor arrangement 1 relatively low.According to the illustrated embodiments, each rotatable member r of the plurality of rotatable members r is a cylindrical roller. Therefore, the plurality of rotatable members r of the first endless track t1, as referred to herein, may also be referred to as a plurality of rollers, a plurality of cylindrical rollers, or the like. However, according to further embodiments, each rotatable member r of the plurality of rotatable members may be formed differently, such as a non-cylindrical roller, a wheel, or the like.Moreover, according to the illustrated embodiments, each rotatable member r of the plurality of rotatable members r is provided with a high friction rolling surface. The high friction rolling surface may also be referred to as an anti-slip rolling surface or friction grip rolling surface. The term “rolling surface”, as used herein, means a surface of the rotatable member r that is configured for engagement with objects moved by the conveyor arrangement 1. The high friction rolling surface may be a patterned surface, such as a rugged surface. Alternatively, or additionally, the rolling surface of each rotatable member r of the plurality of rotatable members r may be formed by rubber, or a rubber-like material. In this manner, high friction can be ensured between the rolling surfaces of the rotatable members r and objects being moved by the conveyor arrangement 1.Each of the first and the second track segments s1, s2 is flexible such that the first endless track t1 can bend in directions perpendicular to the first and second movement directions md1, md2 to follow the contour of the sprockets 11, 12, 13 of the conveyor arrangement 1. A number of pivot axes Pa of the cross members 3 are indicated in Fig. 4 and Fig. 5. When the first endless track t1 is following the contour of a sprocket 11, 12, 13, the pivot axes Pa allows pivoting between adjacent cross members 3. Accordingly, the rotation axes ax1 of two adjacent rotatable members r are not parallel to each other when the two adjacent rotatable members r follows the contour of a sprocket 11, 12, 13. However, the rotation axes ax1 of the plurality of rotatable members r can be said to always be parallel to the movement direction md1, md2 of the first endless track t1 because the movement direction md1, md2, of the first endless track t1 follows the contour of the sprockets 11, 12, 13 of the conveyor arrangement 1 upon movement of the first endless track t1.Fig. 6 illustrates a top view of a conveyor arrangement 1’ according to some further embodiments. According to the embodiments illustrated in Fig. 6, the conveyor arrangement 1’ comprises two first endless tracks t1, t1’. The two first endless tracks t1, t1’ are arranged parallel to each other.Each of the two first endless tracks t1, t1’ is comprised in a conveyor arrangement 1 according to the embodiments explained with reference to Fig. 2 - Fig. 5. Below, simultaneous reference is made to Fig. 1 - Fig. 6, if not indicated otherwise.The feature that the two first endless tracks t1, t1’ are arranged parallel to each other means that they are arranged relative to each other such that the first and second movement directions md1, md2 thereof are parallel to each other. Moreover, the feature that the two first endless tracks t1, t1’ are arranged parallel to each other means that they are arranged relative to each other such that the vertical planes P1 thereof are parallel to each other. Furthermore, obviously, the feature that the two first endless tracks t1, t1’ are arranged parallel to each other means that they are arranged relative to each other such that the rotation axes ax1 of the rotatable members r of the two first endless tracks t1, t1’ are parallel to each other.According to the illustrated embodiments, each of the two first endless tracks t1, t1’ is powered by a respective motor m1, m2. In Fig. 6, the respective motor ml, m2 is connected to a tensioning sprocket of the conveyor arrangement 1, such as a tensioning sprocket 13 as illustrated in Fig. 3, and is configured to move the first endless track t1, t1’ by rotating the tensioning sprocket 13. However, each of the respective motor ml, m2 may be connected to another sprocket of the respective conveyor arrangement 1, such as a first or a second sprocket 11, 12 as is illustrated in Fig. 3, and may be configured to move the first endless track t1, t1' by rotating the first or second sprocket 11, 12. Furthermore, according to some embodiments, one or both of the motors m1 , m2 may be configured to power more than one first endless tracks t1, t1’.According to the embodiments illustrated in Fig. 6, the conveyor arrangement 1' comprises three second endless tracks t2, t2’, t2”. According to further embodiments, the conveyor arrangement 1' may comprise another number of second endless tracks t2, t2’, t2”, such as one, two, four, or more. Each of the second endless tracks t2, t2’, t2” comprises a plurality of rotatable members r arranged to form engagement surfaces for the objects being moved by the conveyor arrangement 1', wherein each of the plurality of rotatable members r is rotationally mounted on the second endless track t2, t2’, t2” around a rotation axis ax2 being parallel to a movement direction md3, md4 of the second endless track t2, t2’, t2”.According to the embodiments illustrated in Fig. 6, the second endless tracks t2, t2’, t2” are longer than the first endless tracks t1, t1’. However, the second endless tracks t2, t2’, t2” may be shorter than the first endless tracks t1, t1’, or may have the same length as the first endless tracks t1, t1 Apart from the length, each of the second endless tracks t2, t2’, t2” comprises the same features, functions, and advantages as the first endless track t1 explained with reference to Fig. 2 - Fig. 5.As can be seen in Fig. 6, the second endless tracks t2, t2’, t2” are arranged perpendicular to the first endless tracks t1, t1'. In other words, the conveyor arrangement 1’ is configured such that each second endless track t2, t2’, t2” is parallel to the other second endless tracks t2, t2’, t2” of the conveyor arrangement 1’, and is perpendicular to each of the first endless tracks t1, t1’ of the conveyor arrangement 1’.The feature that each second endless track t2, t2’, t2” is perpendicular to each of the first endless tracks t1, t1’ of the conveyor arrangement 1’ means that the movement directions md3, md4 of the second endless tracks t2, t2’, t2” are perpendicular to the movement directions md1, md2 of the first endless tracks t1, t1'. In some places below, the movement directions md3, md4 of the second endless tracks t2, t2’, t2” are referred to as a third movement direction md3 and a fourth movement direction md4 of the second endless tracks t2, t2', t2”.According to the embodiments illustrated in Fig. 6, the second endless tracks t2, t2’, t2” of the conveyor arrangement 1’ are powered using one motor m3. The motor m3 is connected to a first connecting shaft cs1 via a belt and pulley assembly 23. According to further embodiments, the motor m3 may be connected to the first connecting shaft in another manner, such as via a chain and sprocket assembly, a transmission, or a direct connection.The first connecting shaft cs1 is connected to first sprockets of one pair of adjacent second endless tracks t2, t2’, like the first sprocket 11 indicated in Fig. 3. The conveyor arrangement 1' according to the embodiments illustrated in Fig. 6 further comprises a second connecting shaft cs2 connecting two second sprockets of the remaining pair of adjacent second endless tracks t2’, t2”, like the second sprocket 12 of the conveyor arrangement 1 indicated in Fig. 3.In this manner, each of the second endless tracks t2, t2’, t2” can be moved along the movement directions md3, md4 indicated in Fig. 6 simply by operating the motor m3.According to further embodiments, the second endless tracks t2, t2’, t2” of the conveyor arrangement 1' may be configured to be moved in another manner, such as by implementing one motor per second endless track t2, t2’, t2”.According to the embodiments illustrated in Fig. 6, each motor m1 , m2, m3 of the conveyor arrangement 1’ is an electric motor. However, according to further embodiments, the conveyor arrangement 1’ may comprise one or more other types of motors for moving the endless tracks t1, t1’, t2, t2’, t2” of the conveyor arrangement 1’, such as for example a hydraulic or pneumatic motor.As understood from the above described, when an object is placed onto the conveyor arrangement 1’, the object can be moved in one of the third or fourth movement directions md3, md4 indicated in Fig. 6 by operating the motor m3 and can be moved in the other of the third or fourth movement directions md3, md4 indicated in Fig. 6 by reversing the rotation direction of the motor m3. Likewise, the object can be moved in one of the first or second movement directions md1, md2 indicated in Fig. 6 by operating the motors m1, m2 and can be moved in the other of the first or second movement directions md1, md2 by reversing the rotation direction of the motors m1, m2.During movement of an object across the conveyor arrangement 1’ in one of the third or fourth movement directions md3, md4, the rotatable members r of the first endless tracks t1, t1’ that engage the object will rotate around their respective rotation axis ax1. Likewise, during movement of an object across the conveyor arrangement 1’ in one of the first or second movement directions md1, md2, the rotatable members r of the second endless tracks t2, t2’, t2” that engage the object will rotate around their respective rotation axis ax2.Accordingly, in this manner, objects can be moved across the conveyor arrangement 1’ in any of the movement directions md1, md2, md3, md4 indicated in Fig. 6 in a smooth and controlled manner without requiring a lifting mechanism configured to change the relative vertical orientation of the first and second endless tracks t1, t1’, t2, t2’, t2” of the conveyor arrangement 1’.In addition, due to the features of the conveyor arrangement 1’, conditions are provided for moving objects in directions transversal to each of the movement directions md1, md2, md3, md4 indicated in Fig. 6 by simultaneously moving the first and second endless tracks t1, t1', t2, t2’, t2” of the conveyor arrangement 1’, i.e., by simultaneously operating the motors m1, m2, m3 of the conveyor arrangement 1’. In this manner, an even more versatile conveyor arrangement 1’ can be provided.Accordingly, due to the features of the conveyor arrangement 1’, a lightweight and noncomplex conveyor arrangement 1’ can be provided in a cost-efficient manner since it does 1't require a costly, heavy, space-demanding, and complex lifting mechanism, nor any advanced control system.Moreover, the conveyor arrangement 1’ can enhance the flexibility of movement of objects by allowing for multi-directional capabilities similar to omniwheel conveyors while at least substantially maintaining the simplicity, stability and reliability of endless track systems.Furthermore, the conveyor arrangement 1’ allows for smooth transitions between different movement paths without the need for extensive lifting mechanisms or complex control systems, thereby reducing costs, complexity, and maintenance challenges. In addition, the conveyor arrangement 1’ can minimize the time required for movement operations and can enhance the ability to handle heavy or unevenly distributed loads without compromising stability or damaging the objects being transported.Fig. 7 illustrated a perspective view of a conveyor arrangement 1” according to yet further embodiments. The conveyor arrangement 1” according to the embodiments illustrated in Fig. 7 comprises fifteen conveyor arrangements 1' according to the embodiments explained with reference to Fig. 6.As indicated in Fig. 1, the vehicle 2 may comprise a conveyor arrangement 1” according to the embodiments illustrated in Fig. 7. In other words, the conveyor arrangement 1 ” according to the embodiments illustrated in Fig. 7 may be arranged inside the cargo compartment 6 of the vehicle 2 illustrated in Fig. 1. In Fig. 7, the longitudinal direction Id 1 of the vehicle 2, the vertical direction vd of the vehicle 2, as well as a lateral direction La of the vehicle 2 is indicated.Below, simultaneous reference is made to Fig. 1 - Fig. 7, if not indicated otherwise.According to the embodiments illustrated in Fig. 7, the fifteen conveyor arrangements 1' are arranged such that the movement directions md3, md4, i.e., the third and fourth movement directions md3, md4 referred to above, of the second endless tracks t2, t2’, t2” are parallel to the longitudinal direction Id 1 of the vehicle 2. Moreover, the fifteen conveyor arrangements 1' are arranged such that the movement directions md1, md2, i.e., the first and second movement directions md1, md2 referred to above, of the first endless tracks t1, t1’ are parallel to the lateral direction La of the vehicle 2. Furthermore, the fifteen conveyor arrangements 1' are arranged such that the vertical planes P1 are parallel to the vertical direction vd of the vehicle 2.In Fig. 7, an example object 8 is illustrated. As understood from the above described, the object 8 can be moved inside the cargo compartment 6 of the vehicle 2 in the first or second movement directions md1, md2 by operating the motors m1 , m2 of the conveyor arrangement 1”. Likewise, the object 8 can be moved inside the cargo compartment 6 of the vehicle 2 in the third or fourth movement directions md3, md4 by operating the motors m3 of the conveyor arrangement 1”. Furthermore, as indicated above, the object 8 can be moved inside the cargo compartment 6 of the vehicle 2 also in directions transversal to each of the first, second, third and fourth movement directions md1, md2, md3, md4 by simultaneously operating the motors m1, m2, m3 of the conveyor arrangement 1”’.The conveyor arrangement 1” could constitute a vital link in a fully automated logistic systems, including the use of autonomous vehicles. That is, the vehicle 2, as referred to herein, may be a fully or partially autonomous vehicle having at least partially autonomous loading and unloading capabilities of objects 8 into and out of the cargo compartment 6 of the vehicle 2.Obviously, the conveyor arrangement 1 ” may comprise another number of conveyor arrangements 1' according to the embodiments explained with reference to Fig. 6 than fifteen. Moreover, the conveyor arrangements 1' may be oriented in another manner relative to the directions Id1, La, vd of the vehicle 2 than described above with reference to Fig. 7 above. Furthermore, the conveyor arrangement 1, 1', 1”, as referred to herein, may be used in other applications than in cargo compartments 6 of vehicles 2, such as in factories, assembly lines, warehouses, or the like.It is to be understood that the foregoing is illustrative of various example embodiments and that the invention is defined only by the appended independent claims. A person skilled in the art will realize that the example embodiments may be modified, and that different features of the example embodiments may be combined to create embodiments other than those described herein, without departing from the scope of the present invention, as defined by the appended independent claims.As used herein, the term "comprising" or "comprises" is open-ended, and includes one or more stated features, elements, steps, components, or functions but does not preclude the presence or addition of one or more other features, elements, steps, components, functions, or groups thereof.

Claims

1. A conveyor arrangement (1, 1', 1 ”) configured to move objects (8), wherein the conveyor arrangement (1, 1’, 1”) comprises a first endless track (t1, t1’) comprising a plurality of rotatable members (r) forming engagement surfaces for the objects (8) being moved by the conveyor arrangement (1, 1', 1 "), wherein each of the plurality of rotatable members (r) is rotationally mounted on the first endless track (t1, t1’) around a rotation axis (ax1) being parallel to a movement direction (md1, md2) of the first endless track (t1, t1’).

2. The conveyor arrangement (1, 1', 1 ”) according to claim 1, wherein the first endless track (t1, t1’) comprises a first and a second track segment (s1, s2), a plurality of cross members (3) connecting the first and second track segments (s1, s2), and member shafts (5) each attached to two adjacent cross members (3) of the plurality of cross members (3), and wherein each rotatable member (r) of the plurality of rotatable members (r) is rotationally arranged around a member shaft (5) of the first endless track (t1, tr).

3. The conveyor arrangement (1, 1', 1 ”) according to claim 2, wherein the member shafts (5) are parallel to the movement direction (md1, md2) of the first endless track (t1, t1’).

4. The conveyor arrangement (1, 1', 1 ”) according to claim 2 or 3, wherein each of the first and a second track segments (s1, s2) is formed as a chain or a belt.

5. The conveyor arrangement (1, 1', 1 ”) according to any one of the preceding claims, wherein each rotatable member (r) of the plurality of rotatable members (r) is a roller.

6. The conveyor arrangement (1, 1', 1 ”) according to any one of the preceding claims, wherein each rotatable member (r) of the plurality of rotatable members (r) is cylindrical.

7. The conveyor arrangement (1, 1', 1 ”) according to any one of the preceding claims, wherein each rotatable member (r) of the plurality of rotatable members (r) is provided with a high friction rolling surface.

8. The conveyor arrangement (1, 1', 1 ”) according to claim 7, wherein the high friction rolling surface is a patterned surface.

9. The conveyor arrangement (1’, 1 ”) according to any one of the preceding claims, wherein the conveyor arrangement ( 1', 1”) comprises two or more first endless tracks (t1, t 1') being arranged parallel to each other.

10. The conveyor arrangement (1', 1”) according to any one of the preceding claims, wherein the conveyor arrangement (1', 1”) comprises a second endless track (t2, t2’, t2”) comprising a plurality of rotatable members (r) arranged to form engagement surfaces for the objects (8) being moved by the conveyor arrangement (1', 1”), wherein each of the plurality of rotatable members (r) is rotationally mounted on the second endless track (t2, t2’, t2”) around a rotation axis (ax2) being parallel to a movement direction (md3, md4) of the second endless track (t2, t2’, t2”), and wherein the second endless track (t2, t2’, t2”) is arranged perpendicular to the first endless track (t1, t 1').

11. The conveyor arrangement ( 1', 1”) according to claim 10, wherein the conveyor arrangement (T, 1”) comprises two or more second endless tracks (t2, t2’, t2”) arranged parallel to each other.

12. A vehicle (2) comprising a cargo compartment (6) and a conveyor arrangement (1, 1', 1”) according to any one of the preceding claims, wherein the conveyor arrangement (1, T, 1”) is arranged inside the cargo compartment (6) of the vehicle (2).

13. The vehicle (2) according to claim 12, wherein the vehicle (2) is a heavy vehicle, such as a truck.