Axle load detection system, axle system and commercial vehicle with an axle load detection system

Abstract

Axle load detection system (1), in particular for a commercial vehicle, comprising a power transmission element (2) and a sensor unit (40), wherein the sensor unit (40) has at least one sensor (42), wherein the power transmission element (2) has a first mounting area (10) and a second mounting area (20), wherein the first mounting area (10) is or can be fixed to a vehicle frame (52) of a vehicle, in particular a commercial vehicle, by means and / or directly, wherein an air spring (120) and / or a link (110), in particular a longitudinal link, is arranged and / or can be arranged on the second mounting area (20) by means and / or directly, wherein the sensor unit (40) is designed to determine and / or detect a force transmitted via the force transmission element (2) between the first mounting area (10) and the second mounting area (20), in particular in a support direction (AR), wherein the power transmission element (2) is a holding bracket (6).

Description

[0001] The invention relates to an axle load detection system, an axle system and a commercial vehicle with an axle load detection system.

[0002] Commercial vehicles are a well-established technology designed to transport a payload from one place to another. To ensure the vehicle's operational safety and prevent excessive strain on the road surface, the axle load must not exceed a certain limit. The driver or operator is primarily responsible for monitoring compliance with the maximum axle load. Determining the axle load typically involves using scales, which must be positioned individually under each axle of the vehicle. This method of determining the axle load is therefore very time-consuming and expensive.

[0003] DE 42 14 785 A1 relates to a display device for monitoring the permissible total weight of commercial vehicles, arranged between the axle and the vehicle frame, wherein the load-dependent difference of this distance can be displayed in an adjustable manner. The required electronic measuring device can be arranged either between the leaf-sprung vehicle axle and the spring assembly, or between the air spring and the frame, and / or between the axle and the spring assembly, or between the spring assembly and the air spring.

[0004] DE 43 19 080 A1 relates to a position weight measuring device for a vehicle, wherein the vehicle has a leaf spring.

[0005] US 2020 / 0 363 274 A1 also concerns a load sensor system with beam-shaped elements.

[0006] It is therefore the object of the invention to provide a simple and quick way to determine the axle load.

[0007] This problem is solved with an axle load detection system according to claim 1 and with an axle system according to claim 9. Further features, advantages and embodiments will become apparent from the dependent claims, the description and the figures.

[0008] According to the invention, an axle load detection system is provided, particularly for a commercial vehicle. In particular, the axle load detection system comprises a force transmission element and a sensor unit, wherein the sensor unit can have at least one sensor, wherein the force transmission element has a first mounting area and a second mounting area, wherein the first mounting area is or can be fixed directly and / or indirectly to a vehicle frame of a vehicle, in particular a commercial vehicle, wherein an air spring and / or a control arm, in particular a trailing arm, is and / or can be arranged directly and / or indirectly on the second mounting area, wherein the sensor unit is designed to determine and / or detect a force transmitted via the force transmission element between the first mounting area and the second mounting area, in particular in a support direction.The axle load detection system according to the invention therefore serves to detect the forces acting on an axle. Advantageously, the axle load detection system is a commercial vehicle axle load detection system. A commercial vehicle within the meaning of the invention is, in particular, a road-legal vehicle and / or a vehicle for transporting loads, wherein the commercial vehicle has, in particular, a permissible total load of more than 3.5 t, preferably more than 7.5 t, and most preferably more than 15 t. It is particularly advantageous if the commercial vehicle is a trailer, in particular a semi-trailer. In other words, the axle load detection system can therefore also be a commercial vehicle trailer axle load detection system. The axle load detection system has, in particular, a force transmission element. This force transmission element has, in particular, a first mounting area and a second mounting area.The first mounting area supports the power transmission element directly and / or indirectly on the frame of a vehicle, particularly a commercial vehicle. This first mounting area can be designed to be fixed to, or capable of being fixed to, the vehicle frame. This fixing can advantageously be achieved by positive locking and / or frictional locking, particularly using reversible fasteners such as screws or bolts. Alternatively, or more preferably, the fixing, especially of the first mounting area, can be irreversible, particularly by a material bond. Such a material bond can be achieved, for example, by welding. The second mounting area of ​​the power transmission element serves to absorb forces from an axle support element.Therefore, the second mounting area of ​​the force transmission element is connected, in particular indirectly and / or directly, to an air spring and / or a control arm, especially a trailing arm, or an axle support. The force transmission element can thus serve to absorb forces from a control arm or an air spring via the second mounting area and safely transfer them to a vehicle frame via the first mounting area. The force transmission element can therefore be, in particular, a separate auxiliary element, or, for example, a mounting bracket on which a trailing arm of a commercial vehicle, especially a trailer, can be or is mounted. In addition to the force transmission element, the axle load detection system according to the invention also has a sensor unit, wherein this sensor unit comprises at least one sensor.The sensor unit is designed to determine and / or detect a force transmitted between the first and second mounting areas, particularly in the support direction. This unit can be used to determine the force transmitted via the force transmission element. Advantageously, the support direction of the axle load detection system, especially when installed, is at least substantially parallel to the direction of the gravitational acceleration vector and / or at least substantially parallel to a compression and / or rebound direction of the air spring and / or the axle being supported. "Substantially parallel" means, in particular, that the smallest angle between the two relevant directions may be a maximum of 15°, preferably a maximum of 10°, more preferably a maximum of 5°, and most preferably a maximum of 1°.Alternatively or additionally, the support direction can particularly also be the direction in which the air spring of a commercial vehicle performs its compression or rebound movement. The sensor or sensors of the sensor unit are particularly arranged in or on the force transmission element to achieve a particularly compact and safe sensor arrangement. The axle load detection system according to the invention makes it possible to determine the axle loads acting on an axle system in a simple and safe manner without the use of scales or other separate components.

[0009] Advantageously, the sensor unit incorporates a multitude of sensors. By providing multiple sensors, a degree of redundancy can be introduced into the system, thus increasing the reliability of the axle load detection system. Advantageously, all sensors in the sensor unit are designed to determine, or be capable of determining, at least a portion of the force transmitted between the first and second mounting areas, particularly in the support direction. In other words, this means that each sensor in the sensor unit can determine a force and / or a stress, especially a mechanical one. For example, such a sensor could be a piezoelectric sensor, a strain gauge, a current sensor, and / or a voltage sensor.Advantageously, all sensors of the axle load detection system's sensor unit are arranged on or within a force transmission element. In other words, the axle load detection system can therefore have not just one force transmission element, but a multitude of force transmission elements, with one or more sensors arranged on or within each of these elements. This allows for a particularly reliable measurement of the existing axle loads.

[0010] Advantageously, at least one sensor is fixed to and / or within the force transmission element. In other words, this can mean that at least one sensor is arranged on each force transmission element in such a way that it is immovable relative to the force transmission element. By fixing at least one sensor to each force transmission element, the forces transmitted by the force transmission element between the first and second mounting areas can be determined in a particularly reliable manner.

[0011] Advantageously, the sensors arranged on the force transmission element lie in a plane or are intersected by a plane. This plane, in particular, has a normal that is at least substantially parallel to the support direction. This allows for a particularly precise determination of the load on the force transmission element, especially in the support direction. Advantageously, the sensors are arranged on the respective force transmission element or on all force transmission elements such that all sensors lie in a plane or are intersected by a plane that has a normal that is at least substantially parallel to the support direction. However, it is possible that this sensor arrangement applies only to one force transmission element of the axle load detection system, and that other force transmission elements have sensors or...Sensors are arranged on these force transmission elements, which do not lie in a single plane. However, it is particularly preferred if all force transmission elements of the axle load detection system are designed or arranged such that they – at least for each force transmission element – ​​lie in a single plane or are intersected by a plane that has a normal which is at least substantially parallel to the support direction. This allows for particularly high measurement accuracy.

[0012] Advantageously, the axle load detection system comprises a plurality of force transmission elements, wherein, in particular, at least one sensor is arranged on each force transmission element. The use of a plurality, especially two or three, of force transmission elements enables particularly accurate detection of the axle load or axle forces. Advantageously, the axle load detection system is designed such that at least one force transmission element has a second mounting area, which is arranged centrally and / or directly on an air spring, and wherein the second mounting area of ​​a further force transmission element is arranged centrally and / or directly on a control arm, in particular a trailing arm.Advantageously, all force transmission elements are designed and / or arranged such that their first mounting area on a vehicle frame is fixed or definable, and the force transmission elements serve to transfer an axle load into the vehicle frame. This design of the axle load detection system allows the axle support forces to be determined with particular reliability via the steering linkage and the air spring. Advantageously, the axle load detection system is arranged such that all axle forces are transferred from the axle to the vehicle frame by one or more force transmission elements.In other words, this can mean that the axle is connected to the vehicle frame exclusively via force transmission elements, with the respective first mounting areas of these force transmission elements advantageously being located directly or indirectly on the supporting vehicle frame. This type of axle support and / or axle load detection system design allows for the particularly reliable determination of all supporting forces. Therefore, a particularly simple evaluation routine can be implemented for converting the detected mechanical stresses and forces from the sensor unit, thus saving costs.

[0013] Advantageously, at least one sensor, preferably at least two and / or all sensors, of the sensor unit is a static and / or passive sensor, in particular a strain gauge. A static sensor is a sensor capable of continuously determining or measuring a static load. Therefore, a sensor with piezoceramic measuring elements is not a static sensor. A passive sensor, on the other hand, is a sensor that does not generate or produce its own energy, in particular its own voltage. Therefore, a piezoceramic sensor is also not a passive sensor. Advantageously, one of the sensors, preferably at least two and / or all sensors, of the sensor unit and / or the sensors on one of the force transmission elements can be a strain gauge. Alternatively or additionally preferably, the sensor can also be a resistive force transducer.By using static and / or passive sensors, a static load on the axle can be detected in a particularly simple manner, allowing the forces acting on the axle system to be reliably determined. Alternatively, a piezoelectric ceramic element or a dynamic force sensor can preferably be used, in which case the axle load can be reliably determined, especially by an integration unit.

[0014] Advantageously, the force transmission element is made of metal or is designed to transmit a force of at least 10 kilonewtons (10,000 N), preferably at least 50 kilonewtons (50,000 N), and particularly preferably 100 kilonewtons (100,000 N) between the first and second mounting areas. By making the force transmission element metal, especially steel, a high force transmission capability between the first and second mounting areas can be achieved. The ability of the force transmission element to transmit a force of at least 10 kN between the first and second mounting areas, particularly in the support direction, allows the axle load detection system to be used safely even in small commercial vehicles.If the transmissible force between the first mounting area and the second mounting area, particularly in the support direction, is at least 100 kN Newtons, it can be ensured that the axle load detection system can be used safely even in heavy commercial vehicles, especially semi-trailers.

[0015] Advantageously, the first mounting area has a first, in particular flat, mounting surface, wherein the first mounting surface has a normal in the support direction, and / or wherein the second mounting area has a second, in particular flat, mounting surface, wherein the second mounting surface has a normal in the support direction. The first mounting surface of the first mounting area serves to make contact, directly or indirectly, with a vehicle frame or a support surface of a vehicle frame. By forming the first mounting surface in a plane, it can be ensured that even high forces can be transmitted safely without exceeding the permissible surface pressure.If the first mounting surface is designed such that it has a normal in the support direction and / or a normal that is at least substantially parallel to the support direction, it can be ensured that no transverse forces are introduced into the axle load detection system through contact between the first mounting surface and a supporting surface, in particular the vehicle frame. Therefore, by designing the first mounting surface in a plane whose normal points at least substantially in the support direction, the measurement error occurring in the axle load detection system can be reduced. Alternatively, or preferably, the second mounting area can also have a second mounting surface, which is expediently planar, wherein the second mounting surface has a normal that is at least substantially parallel to the support direction.This allows the advantages already outlined for the first mounting surface to also be achieved in the second mounting surface. Alternatively, and preferably, the second mounting area can also be formed by a recess, particularly for receiving a pivot bolt for a control arm. Advantageously, the above statements regarding the first and / or the second mounting area apply to one power transmission element and / or to half or the majority of the power transmission elements and / or to all power transmission elements of the axle load detection system.

[0016] According to the invention, at least one force transmission element is a mounting bracket and / or wherein at least one force transmission element is an intermediate element, in particular a plate-shaped intermediate element, for mounting between an air spring and a vehicle frame. By designing a mounting bracket as a force transmission element, the axle forces transmitted via a control arm can be determined and / or detected by the axle load detection system in a particularly simple manner. A mounting bracket within the meaning of the invention is therefore, in particular, the element that transmits the forces between a control arm, in particular a trailing arm, and a vehicle frame and / or that supports and / or mounts the control arm. An intermediate element within the meaning of the invention is, in particular, a force transmission element that is arranged in the force flow between the air spring and the vehicle frame.The intermediate element therefore serves, in particular, and advantageously exclusively, to transmit the forces between the air spring and a vehicle frame. An air spring can advantageously have a piston, in particular a plunger piston, and / or a closing element, in particular a cap, and / or an air spring bellows. The plunger piston serves, in particular, to be able to move into the working volume of the air spring during a compression movement. The plunger piston can be fixed, for example, indirectly, in particular via an intermediate element, and / or directly to a vehicle frame or a control arm. The closing element, on the other hand, serves to support the air spring against a vehicle frame or a control arm and advantageously limits the working volume of the air spring opposite the plunger piston.An air spring bellows, preferably made of an elastic material such as rubber, is advantageously arranged between the plunger piston and the end element. By displacing the end element relative to the plunger piston, particularly in the support direction, the working volume enclosed by the plunger piston, the end element, and the air spring bellows can be compressed and / or reduced. The intermediate element, which is designed as a force transmission element, can be arranged, in particular, between the piston and the linkage and / or between the piston or the end element of the air spring and the vehicle frame. In other words, the intermediate element can serve to transmit the forces introduced or transmitted by the linkage into the air spring or the forces transmitted or introduced between the air spring and the vehicle frame.Alternatively or additionally, the end element and / or the plunger can also be designed as a force transmission element. In other words, in a possible embodiment, the plunger or the end element can be provided with sensors for determining the transmitted forces, particularly in the support direction. This can be achieved, in particular, by attaching strain gauges to the plunger. Advantageously, the sensors on the intermediate element and / or the plunger are arranged such that they lie within a projection of the air spring bellows. "Lying within the projection of the air spring bellows" means that the projection of the sensors onto a plane perpendicular to the support direction lies within the outer contour of the projection of the air spring bellows into this plane – perpendicular to the support direction. In other words, this can mean that, when viewed in the support direction, the sensors or the plunger are located within the outer contour of the projection of the air spring bellows.The projections of the sensors would be surrounded by the air spring bellows, or their projections are surrounded by it. This allows for a particularly compact arrangement of the sensors.

[0017] In a preferred embodiment, the support bracket has two side walls and an end wall, the side walls being connected to each other by the end wall. Advantageously, each side wall has recesses for receiving a pivot pin, and a linkage element is advantageously pivotably mounted or can be mounted on this pivot pin. The side walls are connected to each other, in particular, by the end wall. The support bracket can expediently be designed as a sheet metal construction and / or as a cast body, and to achieve a mechanically robust structure, it may be advantageous to manufacture the support bracket as a single piece.By providing a support bracket with two side walls, in particular oriented parallel to each other, and an end wall which is advantageously oriented transversely to the side walls, a particularly cost-effective and mechanically robust design of the support bracket can be achieved.

[0018] In a preferred embodiment, the side walls and / or the end wall of the mounting bracket form part of the first mounting area, wherein, in particular, the first mounting surface of the first mounting area forms a distal end, especially in the direction of support, of the side walls and / or the end wall. In other words, the side walls and / or the end wall of the mounting bracket can be designed to be fixed directly or indirectly to a vehicle frame. This allows for a particularly secure mechanical transmission of supporting forces between the mounting bracket and the vehicle frame.

[0019] Advantageously, the axle load detection system comprises an evaluation unit, the evaluation unit being designed to receive the measurement data from at least one sensor, preferably all sensors, of the sensor unit and / or the axle load detection system, and being designed to convert the measured values ​​acquired by the sensor into an axle load, in particular using a calibration table and / or a neural network. The evaluation unit can be a separate unit or part of a control unit of the commercial vehicle on which the axle load detection system is mounted. Alternatively or additionally preferably, the evaluation unit can be designed to forward the determined and / or acquired loads or data, in particular the axle loads, to another system and / or control unit, in particular of the vehicle. This transmission can be, for example, wired or wireless.Alternatively or additionally, the evaluation unit can also be connected to, or be connectable to, a CAN bus. The evaluation unit therefore serves, in particular, to convert the acquired measured values ​​into a force, especially in the direction of the support. This can be done, for example, using a calibration table stored in the evaluation unit and / or by applying empirical data and a neural network. By using a calibration table and / or a neural network, even a statically underdetermined or overdetermined system can be used, while still reliably determining the resulting axle loads, especially in the case of a statically overdetermined system.

[0020] Preferably, the axle load detection system is designed such that the measured values ​​are transmitted wirelessly between the sensor(s) of the sensor unit and the evaluation unit. In other words, the transmission of measured values ​​between the sensors of the sensor unit or between the evaluation unit and the sensors can be wireless, thus reducing the installation effort of the axle load detection system. Alternatively, and preferably, the transmission of measured values ​​can also be wired, particularly to reduce the occurrence of noise.

[0021] Another aspect of the invention may relate to an axle system, in particular a commercial vehicle axle system. Advantageously, the axle system comprises a control arm, in particular a longitudinal control arm, and an air spring and at least one axle load sensing system, in particular as described above and below, wherein the air spring and / or the control arm are arranged directly and / or indirectly at the second mounting area of ​​the force transmission element of the axle load sensing system. Such a configuration allows the advantages described above and below to be realized in an axle system.

[0022] In an advantageous embodiment of the axle system, the axle load detection system comprises a first force transmission element and a second force transmission element, wherein the air spring is arranged directly and / or indirectly at the second mounting area of ​​the first force transmission element, and wherein the control arm is arranged directly and / or indirectly at the second mounting area of ​​the second force transmission element. In other words, this can mean that the first force transmission element serves to transmit forces between the air spring and the vehicle frame, and the second force transmission element serves to transmit forces between the control arm and the vehicle frame. This provision of two force transmission elements, wherein at least one sensor of the sensor unit is advantageously arranged on each of these force transmission elements, allows for the advantageous determination of both the forces transmitted via the control arm and those transmitted via the air spring.Advantageously, the axle system comprises not only a first and second force transmission element, but also a third and fourth force transmission element. The first and second force transmission elements are specifically responsible for, for example, the left air spring and the left control arm of an axle, while the third and fourth force transmission elements are responsible for, for example, the right control arm and the right air spring of the axle. By providing, for example, four force transmission elements, all supporting force transmission elements of an axle can be detected by the axle load detection system or monitored by the sensors of the axle load detection system's sensor unit, thus enabling a particularly reliable determination of the axle load.

[0023] In a preferred embodiment, the axle system is designed such that the ratio of the force transmitted by the first force transmission element in the support direction to the force transmitted by the second force transmission element in the support direction lies in the range of 0.3 to 0.65. This allows for monitoring of the axle loads that is particularly robust mechanically. Alternatively, and preferably, the ratio can also lie in the range of 0.4 to 0.52, which also allows for a particularly high degree of accuracy in detecting the transmitted axle loads.

[0024] Another aspect of the invention may relate to a commercial vehicle, in particular a commercial vehicle trailer, with an axle system as described above and below, and / or with an axle load detection system as described above and below. The commercial vehicle trailer may in particular be a semi-trailer. Advantageously, each axle of the commercial vehicle has an axle system as described above or below.

[0025] Further advantages and properties will become apparent from the following description of preferred embodiments of the invention with reference to the accompanying figures. These show: Fig. 1. An axle system with an axle load detection system; and Fig. 2 a force transmission element in the form of an intermediate element.

[0026] In the Fig. Figure 1 shows an axle system 100, which serves to support an axle, particularly in the support direction AR. The axle system 100 includes an axle load detection system 1. The axle load detection system 1 has two force transmission elements 2, one of which is designed as a support bracket 6 and the other as an intermediate element 4. The force transmission elements 2 each have a first mounting area 10 and a second mounting area 20. Advantageously, a first mounting surface 12 is arranged or formed in the first mounting area 10 and a second mounting surface 22 in the second mounting area 20.The force transmission element 2, which is designed as an intermediate element 4, has a first mounting surface 12 in the first mounting area 10 and a second mounting surface 22 in the second mounting area 20, wherein the normals of the planar first mounting surface 12 and the second mounting surface 22 are parallel to the support direction AR. The intermediate element 4 has a first sensor 42 and an evaluation unit 30 on an outer surface. The sensor 42 of the sensor unit 40 serves to determine or detect the forces transmitted by the intermediate element 4 between the first mounting area 10 and the second mounting area 20 between the vehicle frame 52 and the air spring 120, particularly in the support direction AR. The air spring 120 supports the control arm 110 against the vehicle frame 52, particularly in the support direction AR. In the illustrated embodiment, the control arm 110 is a longitudinal control arm which, as shown, can encircle the axle to be supported.The steering link 110 is supported on the power transmission element 2, which is designed as a mounting bracket 6, via its second mounting area 20. The mounting bracket 6 has two side walls 32, which are connected to each other via the end wall 34. Therefore, each of the side walls 32 has a second mounting area 20. The first mounting area 10 of the power transmission element 2, which is designed as a mounting bracket 6, supports the mounting bracket 6 against the vehicle frame 52. The side walls 32 and the end wall 34 each have at least one sensor 42 of the sensor unit 40 of the axle load detection system 1.

[0027] In the Fig.Figure 2 shows an isometric view of a force transmission element 2, which is designed as an intermediate element 4. In its installed state, the intermediate element 4 is supported against a vehicle frame 52 via the first mounting surface 12 of the first mounting area 10. The second mounting area 20, on the other hand, serves to be connected to an air spring 120 or a mounting bracket 6 in order to absorb forces from the mounting bracket 6 or the air spring 120. A sensor 42, which can in particular be a strain gauge, is arranged on an outer surface between the first mounting area 10 and the second mounting area 20. Reference symbol list: 1 axle load detection system 2 Power transmission element 4 Intermediate element 6 Mounting bracket 10 first assembly area 12 first mounting surface 20 second assembly area 22 second mounting surface 32 side wall 34 Front wall 40 sensor units 42 Sensor 52 vehicle frames 100 axle system 110 handlebars 120 air spring AR support direction

Claims

[1] Axle load detection system (1), in particular for a commercial vehicle, with a force transmission element (2) and a sensor unit (40), wherein the sensor unit (40) has at least one sensor (42), wherein the force transmission element (2) has a first mounting area (10) and a second mounting area (20), wherein the first mounting area (10) is fixed or can be fixed directly and / or indirectly to a vehicle frame (52) of a vehicle, in particular a commercial vehicle, wherein an air spring (120) and / or a control arm (110), in particular a longitudinal control arm, is arranged and / or can be arranged directly and / or indirectly on the second mounting area (20), wherein the sensor unit (40) is designed to determine and / or detect a force transmitted via the force transmission element (2) between the first mounting area (10) and the second mounting area (20), in particular in a support direction (AR), wherein the force transmission element (2) is a support bracket (6). [2] Axle load detection system (1) according to claim 1, wherein the sensor unit (40) comprises a plurality of sensors (42). [3] Axle load detection system (1) according to one of the preceding claims, wherein the sensors (42) arranged on the force transmission element (2) lie in a plane or are intersected by a plane having a normal which is at least substantially parallel to the support direction (AR). [4] Axle load detection system (1) according to one of the preceding claims, wherein the force transmission element (2) is made in particular of metal and / or is designed to transmit a force of at least 10 kN, preferably of at least 50 kN and particularly preferably of 100 kN between the first mounting area (10) and the second mounting area (20). [5] Axle load detection system (1) according to one of the preceding claims, wherein the first mounting area (10) has a first, in particular flat, mounting surface (12), wherein the first mounting surface (12) has in particular a normal in the support direction (AR), and / or wherein the second mounting area (20) has a second, in particular flat, mounting surface (22), wherein the second mounting surface (22) in particular has a normal in the support direction (AR). [6] Axle load detection system (1) according to one of the preceding claims, wherein at least one force transmission element (2) is an intermediate element (4), in particular a plate-shaped intermediate element (4), for mounting between an air spring (120) and a vehicle frame (52). [7] Axle load detection system (1) according to claim 6, wherein the support bracket (6) has two side walls (32) and an end wall (34), wherein the side walls (32) are connected to one another by the end wall (34). [8] Axle load detection system (1) according to one of the preceding claims, wherein the axle load detection system (1) comprises an evaluation unit (30), wherein the evaluation unit (30) is designed to receive the measurement data from at least one sensor (42), wherein the evaluation unit (30) is designed to convert the measured values ​​detected by the sensor (42) into an axle load, in particular using a calibration table. [9] Axle system (100), in particular commercial vehicle axle system, comprising a link (110), in particular a longitudinal link, and an air spring (120) and at least one axle load detection system (1) according to one of the preceding claims 1 to 8, wherein the air spring (120) and / or the link (110) is arranged directly and / or indirectly on the second mounting area (20) of the force transmission element (2). [10] Axle system (100) according to claim 9, wherein the axle load detection system (1) comprises a first force transmission element (2) and a second force transmission element (2), wherein the air spring (120) is arranged directly and / or indirectly on the second mounting area (20) of the first force transmission element (2), and wherein the handlebar (110) is arranged directly and / or indirectly on the second mounting area (20) of the second force transmission element (2) wherein in particular the axle system (100) is designed such that the ratio of the force transmitted by the first force transmission element (2) in the support direction (AR) to the force transmitted by the second force transmission element (2) in the support direction (AR) is in a range from 0.3 to 0.65.

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