Weighing installation and vehicle having weighing installation

Abstract

The invention discloses a weighing facility and a vehicle with the same, and relates to the technical field of vehicle engineering. A particular embodiment of the weighing installation comprises a weighing sensor (4) for ascertaining a force perpendicular to its weighing surface, a lateral force limiting device for limiting a force parallel to its weighing surface for the weighing sensor (4), characterized in that the lateral force limiting device is configured as a lever mechanism for limiting the force parallel to its weighing surface. A rotating rod (2) of the lever mechanism is parallel to the weighing surface, a first force arm of the lever mechanism is fixedly connected with the weighing surface, and a second force arm of the lever mechanism is used for being connected with a weighed object. According to the embodiment, the transverse force can be limited or even eliminated in a simple-structure and low-cost mode.

Description

Weighing facilities and vehicles equipped with weighing facilities Technical Field

[0001] The present invention relates to the technical field of vehicle engineering, in particular to a weighing facility and a vehicle with the weighing facility. Background Art

[0002] In vehicles, especially trucks, multiple load cells are typically installed between the vehicle chassis longitudinal beams and the cargo container to measure the container weight and vehicle payload. When measuring the container weight, the load cell reflects the force perpendicular to its weighing surface.

[0003] However, load cells have a disadvantage: they have a low tolerance for forces acting parallel to their weighing surface. This is particularly true when a vehicle is traveling on a steep slope or subjected to a lateral impact. Excessive lateral forces can damage the load cell. To limit lateral strain on load cells, specialized sensor positioning structures are currently used as lateral force limiting devices. These structures, combined with the load cell, form the entire weighing system. However, these sensor positioning structures are typically complex, increasing the cost of the entire weighing system.

[0004] Therefore, there is a need for a weighing device that limits lateral forces in a structurally simple and cost-effective manner.

[0005] Summary of the Invention

[0006] In view of this, embodiments of the present invention provide a weighing facility and a vehicle having the weighing facility, which can limit or even eliminate lateral forces in a structurally simple and low-cost manner.

[0007] In view of this, an embodiment of the present invention provides a weighing facility, the weighing facility comprising:

[0008] a load cell for detecting a force perpendicular to its weighing surface,

[0009] a lateral force limiting device for limiting the force of the load cell parallel to its weighing surface,

[0010] It is characterized by:

[0011] The lateral force limiting device is configured as a lever mechanism, a rotating rod of the lever mechanism is parallel to the weighing surface, wherein a first force arm of the lever mechanism is fixedly connected to the weighing surface, and a second force arm of the lever mechanism is used to connect to the object to be weighed.

[0012] The concept of the present invention is that a lever mechanism, serving as a lateral force limiting device, can only rotate about its support point, and cannot translate relative to the support point. The present invention arranges the lever mechanism between a weighing sensor and the object being weighed, with the weighing surface of the weighing sensor arranged parallel to the rotating arm of the lever mechanism. The component of the object's weight perpendicular to the weighing surface (i.e., the vertical force) causes the lever mechanism to rotate, wherein the vertical force is converted into tension at the weighing surface and measured by the weighing sensor. The component of the object's weight parallel to the weighing surface (i.e., the lateral force) is absorbed by the lever mechanism and is not transmitted to the weighing sensor.

[0013] The technical advantage of the weighing system according to the present invention is that it can limit or even eliminate lateral forces without the complex sensor positioning structures of the prior art. This allows the use of load cells with low or no lateral force tolerance. Furthermore, the weighing system according to the present invention maintains the same operating principle as a standalone load cell (measuring only vertical forces), making it a viable alternative to prior art weighing systems that consist of load cells with complex sensor positioning structures.

[0014] In a preferred embodiment, the first and second lever arms are of equal length. The mechanical advantage of a lever mechanism with equal lever arms is equal to one, and the magnitude of the stress on the weighing surface of the load cell remains unchanged compared to when the object is placed directly on the load cell. This simplifies the processing of the load cell's measured values.

[0015] In a preferred embodiment, the first lever is connected to the weighing surface in a force-locking and / or material-locking manner. For example, the first lever is connected to the weighing surface of the load cell by a threaded or pinned connection. Alternatively or additionally, the first lever is connected to the weighing surface of the load cell by welding or bonding. This creates a stable connection.

[0016] In a preferred embodiment, the second arm is provided with a connection portion for mechanically and / or materially connecting to the object being weighed. For example, the connection portion at the end region of the second arm may be provided with a threaded hole for threaded connection to the object being weighed. Alternatively or additionally, the connection portion at the end region of the second arm may be provided with a welding region for welding to the object being weighed. This creates a stable connection.

[0017] In a preferred embodiment, the weighing system further comprises a base, upon which the lever mechanism and the load cell are disposed. The load cell, lever mechanism, and base can form a preassembled unit. Optionally, one side of the base is provided with a fixing structure compatible with various load cells and / or lever mechanisms, while the other side of the base is provided with a fixing structure adapted to the operating environment. This allows the base to function as an assembly adapter, allowing for simple and quick attachment of the weighing system.

[0018] According to another aspect of the present invention, there is provided a vehicle having a weighing facility, the weighing facility being arranged between a chassis portion and a load portion of the vehicle, and the weighing facility comprising:

[0019] a load cell for detecting a force perpendicular to its weighing surface,

[0020] a lateral force limiting device for limiting the force of the load cell parallel to its weighing surface,

[0021] It is characterized by:

[0022] The lateral force limiting device is configured as a lever mechanism, a rotating rod of the lever mechanism is parallel to the weighing surface, wherein a first lever arm of the lever mechanism is fixedly connected to the weighing surface, and a second lever arm of the lever mechanism is connected to the load part.

[0023] The vehicle according to the invention is preferably a truck, wherein a weighing device according to the invention is provided between a chassis longitudinal beam of the vehicle and a container for the load.

[0024] In a preferred embodiment, it is provided that the first lever arm and the second lever arm have the same length.

[0025] In a preferred embodiment, it is provided that the first lever is connected to the weighing surface in a non-positive and / or materially bonded manner.

[0026] In a preferred embodiment, it is provided that the second lever is connected to the load part in a force-fitting and / or material-fitting manner.

[0027] In a preferred embodiment, the weighing facility further comprises a base, the lever mechanism and the weighing sensor are arranged on the base, and the chassis part is fixedly connected to the base.

[0028] The advantages and benefits described with regard to the weighing installation according to the invention also apply to the vehicle according to the invention having the weighing installation.

[0029] The further effects of the above-mentioned non-conventional optional manner will be described below in conjunction with specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are provided for a better understanding of the present invention and are not intended to limit the present invention.

[0031] FIG1 is a schematic diagram of a vehicle with a weighing facility according to the present invention;

[0032] FIG2 is a first embodiment of a weighing facility according to the present invention;

[0033] FIG. 3 shows a second embodiment of a weighing installation according to the present invention. DETAILED DESCRIPTION

[0034] The following description of exemplary embodiments of the present invention is made in conjunction with the accompanying drawings, in which various details of the embodiments of the present invention are included to facilitate understanding. These details should be considered as merely exemplary. Therefore, it should be appreciated by those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present invention. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0035] Figure 1 shows a schematic diagram of a vehicle equipped with a weighing system according to the present invention. Vehicle 10 is a load-carrying vehicle. Four weighing systems are positioned between its chassis longitudinal beam 11 and a cargo container 12. These are located at the four corners of the underside of the container 12 (only two of these are visible in the plan view of Figure 1). Each of the four weighing systems can independently perform weighing, and the container's weight can be determined by summing the measured values ​​from all of the weighing systems.

[0036] Optionally, but not shown, a greater or fewer number of weighing facilities may be arranged between the chassis longitudinal beam 11 and the container 12 .

[0037] Optionally but not shown, a jig is arranged on the side of the chassis longitudinal beam 11 to arrange the weighing device more stably on the chassis longitudinal beam 11 .

[0038] Figure 2 shows a first embodiment of a weighing system according to the present invention. The weighing system includes a load cell 4 for detecting tension or compression perpendicular to its weighing surface. The weighing system also includes a lever mechanism comprising a support 1, a rotating lever 2, and a bracket 6. The rotating lever 2 is supported on the bracket 6 by the support 1 so that it can rotate about an axis of rotation A extending perpendicular to the plane of the drawing.

[0039] The load cell 4 is fastened with its side facing away from its weighing surface to the chassis longitudinal member 11, and the bracket 6 is also fastened to the chassis longitudinal member 11. The lever mechanism thus has one degree of freedom in rotation about the axis of rotation A and a degree of freedom in translation in the direction of extension of the rotating lever 2.

[0040] The connection part 3 at one end of the rotating rod 2 is connected to the weighing surface of the weighing sensor 4 by welding in order to ensure a stable connection.

[0041] Optionally, but not shown, threaded holes are provided on both the connection portion 3 and the weighing surface, allowing screws to screw the rotating rod 2 and the load cell 4 together. Optionally, but not shown, through-holes are provided on the connection portion 3 and the load cell 4, allowing pins to connect them together. The above connection methods may also be implemented in combination, as long as a secure connection between the rotating rod 2 and the load cell 4 is ensured.

[0042] The connection 8 at the other end of the rotating rod 2 is welded to the foot of the container 12 in order to ensure a stable connection.

[0043] Optionally, but not shown, threaded holes are provided on the connection portion 8 and the legs of the container 12 for screwing the rotating rod 2 to the container 12. Optionally, but not shown, the rotating rod 2 is adhesively bonded to the legs of the container 12 at the connection portion 8. The above connection methods may be combined as long as a secure connection between the rotating rod 2 and the container 12 is ensured.

[0044] The distance between the connecting portion 3 and the rotation axis A serves as the first lever arm of the lever mechanism, and the distance between the connecting portion 8 and the rotation axis A serves as the second lever arm of the lever mechanism. The first lever arm and the second lever arm are equal in length, and the mechanical advantage of the lever mechanism is equal to one. Optionally, but not shown, the first lever arm and the second lever arm are equal in length, and the mechanical advantage of the lever mechanism is equal to the ratio of the length of the second lever arm to the length of the first lever arm.

[0045] Figure 2 shows the weighing system when vehicle 10 is on a horizontal surface. Rotating arm 2 extends horizontally, with axis of rotation A perpendicular to the plane of the drawing. The weighing surface of load cell 4 is parallel to the horizontal surface. In this situation, the weight of the container causes a slight rotation of rotating arm 2, which is converted 1:1 into tension at the weighing surface of load cell 4. The weight of the container is then determined by the force output by load cell 4.

[0046] When vehicle 10 is on a slope, the container's weight has a component perpendicular to the weighing surface (vertical force) and a component parallel to the weighing surface (lateral force). In this situation, the vertical force causes the container's weight to slightly rotate swivel arm 2. This vertical force is converted 1:1 into tension at the weighing surface of load cell 4, and the vertical force is determined by the force output by load cell 4. Because the lever mechanism lacks translational freedom in the direction of the lateral force, the lateral force is absorbed by the lever mechanism and not transmitted to load cell 4.

[0047] As a result, the lateral forces acting on the weighing system relative to the weighing surface are eliminated, so that no requirements are placed on the lateral force bearing capacity of the load cells 4 used in the weighing system.

[0048] FIG3 shows a second embodiment of a weighing facility according to the present invention. Unlike the first embodiment shown in FIG2 , the weighing facility further comprises a base 5 . The load cell 4 is arranged on the base 5 with the side facing away from its weighing surface, and the bracket 6 is also arranged on the base 5 . The chassis longitudinal beam 11 is fixedly connected to the base 5 . The load cell 4 , the lever mechanism, and the base 5 form a pre-assembled unit. Optionally, but not shown, one side of the base 5 is provided with a fixing structure that matches the load cell 4 and the lever mechanism, and the other side of the base 5 is provided with a fixing structure that matches the chassis longitudinal beam 11 of the vehicle 10 . In other words, the base 5 acts as an assembly adapter.

[0049] In terms of other components, the second embodiment shown in FIG. 3 is the same as the first embodiment shown in FIG. 2 , and therefore reference may be made to the above description of FIG. 2 .

[0050] According to the invention, a vehicle is proposed with a weighing facility, which is arranged between a chassis part and a load part of the vehicle and comprises:

[0051] Load cell, which is used to obtain the force perpendicular to its weighing surface.

[0052] Transverse force limiting device, which is used to limit the force parallel to the weighing surface of the load cell.

[0053] in,

[0054] The lateral force limiting device is configured as a lever mechanism, a rotating rod of the lever mechanism is parallel to the weighing surface, wherein a first lever arm of the lever mechanism is fixedly connected to the weighing surface, and a second lever arm of the lever mechanism is connected to the load part.

[0055] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A weighing facility, comprising: a load cell for detecting a force perpendicular to its weighing surface, a lateral force limiting device for limiting the force of the load cell parallel to its weighing surface, It is characterized in that The lateral force limiting device is configured as a lever mechanism, a rotating rod of the lever mechanism is parallel to the weighing surface, wherein a first force arm of the lever mechanism is fixedly connected to the weighing surface, and a second force arm of the lever mechanism is used to connect to the object to be weighed.

2. The weighing facility according to claim 1, characterized in that The first lever arm and the second lever arm are equal in length.

3. The weighing facility according to claim 1, characterized in that The first lever is connected to the weighing surface in a non-positive and / or materially bonded manner.

4. The weighing facility according to claim 1, characterized in that The second lever arm is provided with a connection portion for mechanically and / or materially connecting to an object to be weighed.

5. The weighing facility according to claim 1, characterized in that The weighing facility further comprises a base, on which the lever mechanism and the weighing sensor are arranged.

6. A vehicle having a weighing facility, the weighing facility being arranged between a chassis portion and a load portion of the vehicle, the weighing facility comprising: a load cell for detecting a force perpendicular to its weighing surface, a lateral force limiting device for limiting the force of the load cell parallel to its weighing surface, It is characterized by: The lateral force limiting device is configured as a lever mechanism, a rotating rod of the lever mechanism is parallel to the weighing surface, wherein a first lever arm of the lever mechanism is fixedly connected to the weighing surface, and a second lever arm of the lever mechanism is connected to the load part.

7. The vehicle according to claim 6, characterized in that The first lever arm and the second lever arm are equal in length.

8. The vehicle according to claim 6, characterized in that The first lever is connected to the weighing surface in a non-positive and / or materially bonded manner.

9. The vehicle according to claim 6, characterized in that The second lever arm is connected to the load part in a force-fitting and / or material-fitting manner.

10. The vehicle according to claim 6, characterized in that The weighing facility further comprises a base, the lever mechanism and the weighing sensor are arranged on the base, and the chassis part is fixedly connected to the base.

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