Magnetic sensing type automobile weighing device

Abstract

The utility model relates to the field of truck weighing, in particular to a magnetic sensing type automobile weighing device which comprises a first base connected with a girder and provided with a rotating shaft, a first connecting rod is fixedly connected to the rotating shaft, and one end, away from the rotating shaft, of the first connecting rod is rotatably connected with a second connecting rod. One end, away from the first connecting rod, of the second connecting rod is rotationally connected with the crossbeam; the first base is connected with a magnetic sensitive element, and the rotating shaft is connected with a magnet capable of enabling the magnetic sensitive element to generate induction through a third connecting rod; when the girder bears load, the second connecting rod pushes the first connecting rod to enable the rotating shaft to rotate along the first base, and the third connecting rod drives the magnet to be away from the magnetic sensitive element. The load condition of the lorry can be accurately calculated through the change of the distance between the magneto-sensitive element and the artificial magnet, and compared with the traditional technology, the sensitivity is higher and the measuring range is larger; in addition, installation is easy, the whole vehicle installation cost is low, and application and popularization are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of truck weighing, and particularly relates to a magnetosensitive vehicle weighing device. Background Art

[0002] In recent years, with the rapid development of China's economy, the volume of freight transportation has also increased rapidly. The extending and accessible highway network has driven the rapid growth of the road freight market. On the contrary, it is extremely difficult to control overloading; the prerequisite for overloading control is the accurate detection of the cargo weight. Considering the total weight of trucks, the load of large trucks can generally reach dozens of tons at present, and a truck can appear in any corner of the country, with extremely complex vehicle conditions and environmental conditions.

[0003] In the prior art, there are various ways to weigh trucks: 1. Fixed weighbridge: It has a high cost and is fixed in location, with great limitations; 2. Non-contact weighing: Currently, mainly ultrasonic and other means are used to detect the distance of the truck chassis girder descending under the pressure of the cargo or the micro-deformation of the girder itself, but the accuracy is insufficient and it is closely related to the driver's driving behavior, which leads to uncontrollable weighing accuracy; 3. Resistance strain gauge pressure sensor scheme: A pressure sensor is made using a resistance strain gauge to directly detect the pressure on the truck chassis. Although this scheme is theoretically feasible, due to reasons such as too low sensitivity of the resistance strain gauge and very narrow effective range, the accuracy of this scheme is very low and it cannot meet the actual application. Therefore, how to obtain the load of trucks in real time and stably is a problem that those skilled in the art need to consider. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a magnetosensitive vehicle weighing device to solve the problems of low real-time weighing accuracy and poor stability of trucks in the prior art.

[0005] The technical solution of the utility model is: A magnetosensitive vehicle weighing device, the vehicle includes an axle, the axle is connected to a girder through a shock absorption mechanism. When the girder bears weight, it compresses the shock absorption mechanism and approaches the axle. It includes a first base connected to the girder and provided with a rotating shaft, a first connecting rod is fixedly connected to the rotating shaft, one end of the first connecting rod away from the rotating shaft is rotatably connected to a second connecting rod, and one end of the second connecting rod away from the first connecting rod is rotatably connected to the girder;

[0006] A magnetosensitive element is connected to the first base, and the rotating shaft is connected to a magnet through a third connecting rod that can cause the magnetosensitive element to generate an induction; when the girder bears weight, the second connecting rod drives the first connecting rod to rotate the rotating shaft along the first base, and drives the magnet away from the magnetosensitive element through the third connecting rod.

[0007] Preferably, the third connecting rod is rotatably connected to the rotating shaft;

[0008] A first bracket is connected to the rotating shaft, and the first bracket is fixedly connected to the rotating shaft; a supporting portion is provided at one end of the first bracket away from the rotating shaft, and the supporting portion is provided at the lower end of the third connecting rod.

[0009] Preferably, the first base includes a bottom plate and a second bracket connected to the bottom plate. The rotating shaft is connected to the second bracket, and the magnetic sensitive element is connected to the base.

[0010] Preferably, a fixing device is connected to one end of the bottom plate away from the second bracket, and the first base is connected to the girder through the fixing device;

[0011] A connecting groove is provided on the fixing device. The outer wall of the connecting groove is fixedly connected to the first base. A through fastening bolt is provided on the side away from the bottom plate. The connecting groove is clamped on the girder and fixed by the fastening bolt.

[0012] Preferably, a support rod is connected to the bottom plate. One end of the support rod away from the bottom plate is connected to the third connecting rod, and one end of the support rod away from the bottom plate protrudes from the magnetic sensitive element.

[0013] Preferably, a second base is rotatably connected to one end of the second connecting rod away from the first connecting rod, and the second connecting rod is connected to the axle through the second base.

[0014] Preferably, a dust cover is provided on the bottom plate. The second bracket, the magnetic sensitive element and the magnet are all arranged inside the cavity formed by the dust cover and the bottom plate;

[0015] The end of the rotating shaft penetrates through the dust cover and is connected to the first connecting rod.

[0016] Compared with the prior art, the advantages of the present utility model are:

[0017] (1) The sensing element and the magnet of the magnetic sensitive sensor are respectively installed on the girder and the axle of the freight car. The load condition of the freight car can be accurately calculated through the change of the distance between the magnetic sensitive element and the artificial magnet. Compared with the traditional technology, the sensitivity is higher and the range is larger; in addition, the installation is simple, and the overall vehicle installation cost is lower, which is more conducive to popularization and use;

[0018] (2) The third connecting rod is supported by the first bracket. When the freight car has severe bumps and other situations, it can avoid the situation that the range of movement of the magnet is too large and it collides with the magnetic sensitive element or other devices and is damaged; in addition, the setting of the support rod further avoids the collision between the magnet and the magnetic sensitive element, which affects the detection accuracy. Description of the Drawings

[0019] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0020] Figure 1Schematic diagram of the structure when the weighing device described in the present utility model is connected to an automobile;

[0021] Figure 2 Schematic diagram of the structure of the weighing device described in the present utility model;

[0022] Figure 3 Schematic diagram of the internal structure of the dust cover described in the present utility model Figure 1 ;

[0023] Figure 4 Schematic diagram of the internal structure of the dust cover described in the present utility model Figure 2 。

[0024] Wherein: axle 1, girder 2, first base 3, bottom plate 31, support rod 311, second bracket 32, rotating shaft 33, third connecting rod 34, first bracket 35, supporting portion 351, magnet 36, magneto-sensitive element 4, first connecting rod 5, second connecting rod 6, second base 7, fixing device 8, connecting groove 81, fastening bolt 82, dust cover 9. Specific embodiments

[0025] The following combines specific embodiments to further elaborate on the content of the present utility model:

[0026] As Figures 1-4 shown, the present utility model is applied to real-time weighing of trucks. When the truck is loaded, the girder and the axle approach each other. Through the transmission of multiple link devices and rotating shafts, etc., the magneto-sensitive element and the magnet move away from each other; furthermore, the magneto-sensitive element senses the change of the gradient magnetic field constructed by the magnet 36, and the load condition can be calculated. Specifically, a magneto-sensitive type vehicle weighing device, the vehicle includes an axle 1, and the axle 1 is connected to the girder 2 through a shock absorption mechanism (not shown in the figure). When the girder 2 bears weight, it compresses the shock absorption mechanism and approaches the axle 1. The weighing device includes a first base 3 connected to the girder 2 and provided with a rotating shaft. The first base 3 includes a bottom plate 31 and a second bracket 32 connected to the bottom plate 31. The rotating shaft is connected to the second bracket 32, and the rotating shaft 33 can rotate along its axial direction on the second bracket 32; the magneto-sensitive element 4 is connected to the bottom plate 31. A first connecting rod 5 is fixedly connected to the rotating shaft 33. One end of the first connecting rod 5 away from the rotating shaft 33 is rotatably connected to a second connecting rod 6. One end of the second connecting rod 6 away from the first connecting rod 5 is rotatably connected to a second base 7, and the second base 7 is fixedly connected to the girder 2.

[0027] A third connecting rod 34 is connected to the rotating shaft 33. The third connecting rod 34 is rotatably connected to the rotating shaft 33 and can rotate along the axial direction of the rotating shaft 33. A first support 35 is also fixedly connected to the rotating shaft 33. A supporting portion 351 is provided at one end of the first support 35 away from the rotating shaft 33. The supporting portion 351 is arranged at the lower end of the third connecting rod 34. That is, in the free state, due to their own gravity, the third connecting rod 34 and the magnet 36 have a tendency to rotate along the rotating shaft 33, but are kept stationary by the support of the first support 35 and the supporting portion 351. When the vehicle is loaded, through the transmission of the first connecting rod 5 and the second connecting rod 6, the rotating shaft 33 rotates, and then the first support 35 rotates. The third connecting rod 34 and the magnet 36 move with the first support 35 and the supporting portion 351 to move away from the magnetic sensor element 4, so as to obtain the magnetic field change value and get the load value. When the vehicle has a severe bump, through the transmission of the first connecting rod 5 and the second connecting rod 6, the rotation amplitude of the rotating shaft 33 increases. If the third connecting rod 34 is fixedly connected to the rotating shaft 33, the magnet 36 will also swing greatly accordingly, which may cause a hard collision between the magnet 36 and the magnetic sensor element 4 or other mechanisms, resulting in damage. In this embodiment, a support rod 311 can also be connected to the bottom plate 31. One end of the support rod 311 away from the bottom plate 31 is connected to the third connecting rod 34, and the end of the support rod 311 away from the bottom plate 31 protrudes beyond the magnetic sensor element 4. When the vehicle has a severe bump and the third connecting rod 34 rotates towards the support rod 311, the support rod 311 plays a supporting role on the third connecting rod 34, so that the third connecting rod 34 stops rotating. At this time, the third connecting rod 34 disengages from the supporting portion 351, avoiding the collision between the magnet 36 and the magnetic sensor element 4.

[0028] A fixing device 8 is connected to one end of the bottom plate 31 away from the second support 32. The first base 3 is connected to the girder 2 through the fixing device 8. A connecting groove 81 is provided on the fixing device 8. The outer wall of the connecting groove 81 is fixedly connected to the first base 3, and a through fastening bolt 82 is provided on the side away from the bottom plate 31. The girder 2 of the truck is generally a channel steel. When the weighing device in this embodiment is installed, the connecting groove 81 is clamped on the girder 2, that is, the edge of the channel steel, and is fixed by the fastening bolt.

[0029] To further ensure the measurement accuracy and avoid the damage to the weighing device when driving in dusty or harsh road conditions, a dust-proof cover 9 is provided on the bottom plate 31. Among them, the second support 32, the magnetic sensor element 4, the magnet 36, the third connecting rod 34 and the first support 35 are all arranged inside the cavity formed by the dust-proof cover 9 and the bottom plate 31. One end of the rotating shaft 33 penetrates through the dust-proof cover 9 and is connected to the first connecting rod 5.

[0030] In this embodiment, the principle of vehicle weighing is as follows: when the vehicle is carrying a load, the beam 2 and the axle 1 approach each other, the second link 6 drives the first link 5, and the first link 5 drives the rotating shaft 33 to rotate on the second bracket 32; the first bracket 35 rotates with the rotating shaft 33 and drives the third link 34 and the magnet 36 to rotate through the supporting portion 351, and the magnet 36 moves away from the magneto-sensitive element 4; the magneto-sensitive element 4 senses the change in the magnetic field, and according to the change value, the controller calculates the load value.

[0031] It should be noted that in other embodiments, by setting the relative positions of the magneto-sensitive element 4 and the magnet 36, when the vehicle is loaded, the magneto-sensitive element 4 and the magnet 36 approach each other, and then the load condition can be calculated.

[0032] The above embodiments are only for illustrating the technical concept and characteristics of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention.

Claims

1. A magnetic sensitive automobile weighing device, wherein the axle is connected to the beam through a damping mechanism, and when the beam bears the load, the damping mechanism is compressed and approaches the axle, characterized in that: It comprises a first base connected to the beam and provided with a rotating shaft, the rotating shaft is fixedly connected to a first connecting rod, one end of the first connecting rod away from the rotating shaft is rotatably connected to a second connecting rod, and one end of the second connecting rod away from the first connecting rod is rotatably connected to the beam; A magnetically sensitive element is connected to the first base, and the rotating shaft is connected to a magnet that can induce the magnetically sensitive element through a third connecting rod; when the beam bears weight, the second connecting rod pushes the first connecting rod to make the rotating shaft rotate along the first base, and drives the magnet away from the magnetically sensitive element through the third connecting rod.

2. A magnetic sensitive vehicle weighing device according to claim 1, characterized in that: The third connecting rod is rotatably connected to the rotating shaft; The rotating shaft is connected with a first bracket, and the first bracket is fixedly connected to the rotating shaft; the first bracket is provided with a supporting portion at one end away from the rotating shaft, and the supporting portion is provided at the lower end of the third connecting rod.

3. A magnetic sensitive automobile weighing device according to claim 1, characterized in that: The first base comprises a bottom plate and a second bracket connected to the bottom plate, the rotating shaft is connected to the second bracket, and the magnetic sensitive element is connected to the base.

4. A magnetic sensitive automobile weighing device according to claim 3, characterized in that: The end of the bottom plate away from the second bracket is connected to a fixing device, and the first base is connected to the beam through the fixing device; The fixing device is provided with a connecting groove, the outer wall of which is fixedly connected to the first base, and a penetrating fastening bolt is provided on the side away from the bottom plate. The connecting groove is clamped on the beam and fixed by the fastening bolt.

5. A magnetic sensitive automobile weighing device according to claim 4, characterized in that: The bottom plate is connected with a support rod, one end of the support rod away from the bottom plate is connected with the third connecting rod, and the other end of the support rod away from the bottom plate protrudes from the magnetic sensitive element.

6. A magnetic sensitive automobile weighing device according to claim 1, characterized in that: One end of the second connecting rod away from the first connecting rod is rotatably connected to a second base, and the second connecting rod is connected to the axle through the second base.

7. A magnetic sensitive automobile weighing device according to claim 3, characterized in that: The bottom plate is provided with a dust cover, and the second bracket, the magnetic sensitive element and the magnet are all arranged inside a cavity formed by the dust cover and the bottom plate; The end of the rotating shaft passes through the dust cover and is connected to the first connecting rod.

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