Truck weighing device

Abstract

The utility model relates to the field of vehicle weighing, in particular to a truck weighing device, which comprises an axle, the axle is connected with a girder through a damping mechanism, when the girder bears load, the damping mechanism is compressed and is close to the axle, and the truck weighing device comprises a first guide rod connected to the girder of the truck and a second guide rod connected to the axle, one end, far away from the axle, of the first guide rod is arranged in a first cavity formed in the first guide rod; a Hall element, an artificial magnet and a gradient magnetic field constructed by the artificial magnet are arranged in the first cavity, and one end of the artificial magnet is connected with the end, away from the axle, of the second guide rod; when the crossbeam bears load, the first guide rod drives the artificial magnet to enable the artificial magnet to be close to the Hall element. The sensing element and the artificial magnet of the Hall sensor are respectively arranged on the girder and the axle of the truck, and the load condition of the truck can be accurately calculated through the change of the distance between the sensing element and the artificial magnet.

Description

Technical Field

[0001] The utility model relates to the technical field of truck weighing, in particular to a truck weighing device. Background Art

[0002] With the rapid development of my country's economy in recent years, the volume of cargo transportation has also increased rapidly. The wide-reaching and continuous extension of highways has driven the rapid growth of the road freight market. Road freight is fast and convenient, but a large amount of transportation puts great pressure on trucks and roads. Overloading occurs frequently, seriously endangering the safety of drivers and trucks, and shortening the life of roads / bridges. In contrast, overloading control is difficult; the premise of overloading control is to accurately detect the weight of cargo. Considering the total weight of the truck, the current large truck load can generally reach dozens of tons, and a truck can appear in any corner of the country, and the vehicle condition and environmental conditions are extremely complex.

[0003] In the prior art, there are many ways to achieve truck weighing: 1. Fixed scales: high cost, fixed location, and great limitations; 2. Non-contact weighing: currently there are mainly other means such as ultrasound to detect the distance the truck chassis beam drops under the pressure of the cargo or the micro-deformation of the beam itself, but the accuracy is not enough and is closely related to the driver's driving behavior, which leads to uncontrollable weighing accuracy; 3. Resistance strain gauge pressure sensor solution: Use resistance strain gauges to make pressure sensors to directly detect the pressure of the truck chassis. Although this solution is theoretically feasible, due to the low sensitivity of the resistance strain gauge and the narrow effective range, this solution has low accuracy and cannot meet practical applications. Therefore, how to obtain the load status of the truck in real time and stably is a problem that technicians in this field need to consider. Utility Model Content

[0004] The utility model aims to provide a truck weighing device to solve the problems of low precision and poor stability of real-time weighing of trucks in the prior art.

[0005] The technical solution of the utility model is: a truck weighing device, the truck includes a vehicle bridge, the vehicle bridge is connected to the beam through a shock absorbing mechanism, when the beam bears the load, the shock absorbing mechanism is compressed and approaches the vehicle bridge, including a first guide rod connected to the truck beam, a second guide rod connected to the vehicle bridge, and an end of the first guide rod away from the vehicle bridge is arranged in a first cavity formed inside the first guide rod;

[0006] The first cavity is provided with a Hall element, an artificial magnet and a gradient magnetic field constructed by the artificial magnet. One end of the artificial magnet is connected to an end of the second guide rod away from the axle. When the beam bears the load, the first guide rod drives the artificial magnet to approach the Hall element.

[0007] Preferably, a first guide sleeve connected to the second guide rod is provided in the first cavity, and the second guide rod can move along the first guide sleeve so that the artificial magnet approaches or moves away from the Hall element.

[0008] Preferably, a second cavity is formed inside the second guide rod, and a second guide sleeve is provided in the second cavity; and the artificial magnet is connected to the second guide sleeve via a third guide rod.

[0009] Preferably, a limit block is provided at the upper end of the third guide rod, and the limit block is provided at the upper end of the second guide sleeve;

[0010] The lower end of the third guide rod is connected with a fixing seat, and the artificial magnet is fixedly arranged on the fixing seat.

[0011] Preferably, a spring is sleeved on the third guide rod, the upper end of the spring is connected to the second guide sleeve, and the lower end of the spring is connected to the fixing seat.

[0012] Preferably, the first guide rod is connected to the axle via the first base, and the first guide rod is rotatably connected to the first base;

[0013] The second guide rod is connected to the truck beam through the second base, and the second guide rod is rotatably connected to the second base.

[0014] Compared with the prior art, the advantages of the utility model are:

[0015] (1) The sensing element and artificial magnet of the Hall sensor are installed on the beam and axle of the truck respectively. The change in the distance between the sensing element and the artificial magnet can accurately calculate the load of the truck. Compared with traditional technology, it has higher sensitivity and larger range. In addition, it is easy to install and the installation cost of the whole vehicle is low, which is more conducive to popularization and use.

[0016] (2) By setting the second guide sleeve and the third guide rod, damage to the weighing device can be avoided when the weighing range is exceeded. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0018] Figure 1 This is a schematic diagram of the structure of the truck weighing device of the utility model;

[0019] Figure 2 This is a schematic diagram of the top view of the truck weighing device of the utility model;

[0020] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle.

[0021] Wherein: a first guide rod 1, a first cavity 1a, a Hall element 11, a first guide sleeve 12, and a first base 13;

[0022] The second guide rod 2 , the second cavity 2 a , the artificial magnet 21 , the second base 22 , the second guide sleeve 23 , the third guide rod 24 , the fixing seat 25 , the limit block 26 , and the spring 27 . DETAILED DESCRIPTION

[0023] The following is a further detailed description of the present invention in conjunction with specific embodiments:

[0024] like Figure 1-Figure 3 As shown, a truck weighing device, the truck includes an axle (not shown in the figure), the axle is connected to a beam (not shown in the figure) through a shock absorbing mechanism (not shown in the figure), when the beam bears the load, the shock absorbing mechanism is compressed and approaches the axle.

[0025] The weighing device includes a first guide rod 1 connected to the truck beam, a second guide rod 2 connected to the vehicle bridge, and the end of the first guide rod 1 away from the vehicle bridge is arranged in a first cavity 1a formed inside the first guide rod 1. A Hall element 11 and an artificial magnet 21 and a gradient magnetic field formed by the artificial magnet 21 are arranged in the first cavity 1a, and one end of the artificial magnet 21 is connected to the end of the second guide rod 2 away from the vehicle bridge; when the beam is bearing the load, the first guide rod 1 drives the artificial magnet 21 to make the artificial magnet 21 close to the Hall element 11. In this embodiment, the lower end of the first guide rod 1 is rotatably connected to the first base 13, and the first base 13 is fixedly connected to the vehicle bridge; the upper end of the second guide rod 2 is rotatably connected to the second base 22, and the second base 22 is fixedly connected to the truck beam. During the process of loading and driving the truck, the distance and relative position between the beam and the vehicle bridge will change. The rotatable connection between the first guide rod 1 and the second guide rod 2 can avoid damage to the weighing device.

[0026] The first cavity 1a may be in the shape of a cylinder with an opening upward, and the Hall element 11 is connected to the bottom of the first cavity 1a; the lower end of the second guide rod 2 extends into the first cavity 1a, and is connected to the inner wall of the first cavity 1a through the first guide sleeve 12, so that the second guide rod 2 can move telescopically along the first guide sleeve 12, and then the artificial magnet 21 connected to the second guide rod 2 can approach or move away from the Hall element 11. That is, when the truck is loaded, the shock absorbing mechanism of the truck is compressed, the beam and the axle are close to each other, so that the second guide rod 2 moves along the first guide sleeve 12, and the artificial magnet 21 moves close to the Hall element 11, and then the specific load of the truck can be converted through the change of the magnetic field strength induced by the Hall element 11.

[0027] When the truck load is too large, greater than the measuring range of the weighing device, the second guide rod 2 moves too far along the first guide sleeve 12, which may cause the artificial magnet 21 to collide with the Hall element 11, causing damage to the weighing device. Therefore, the interior of the second guide rod 2 is set as a barrel-shaped second cavity 2a, and the open end of the second cavity 2a extends into the first cavity 1a. A second guide sleeve 23 is set in the second cavity 2a, and a third guide rod 24 is sleeved in the second guide sleeve 23. The lower end of the third guide rod 24 is connected to a fixed seat 25, and the artificial magnet 21 is fixedly connected to the fixed seat 25; the upper end of the second guide rod 2 is fixedly connected to a limit block 26, and the lower end of the outer edge of the limit block 26 is connected to the second guide sleeve 23. The third guide rod 24 is prevented from detaching from the second guide sleeve 23 through the limit of the limit block 26. A spring 27 is sleeved on the third guide rod 24, the upper end of the spring 27 is connected to the second guide sleeve 23, and the lower end is connected to the fixed seat 25, so that in normal use scenarios, the positions of the artificial magnet 21 and the second guide rod 2 are relatively fixed, so as to avoid the occurrence of inaccurate measurement due to the displacement of the positions of the second guide rod 2 and the artificial magnet 21 during weighing. In addition, when the load of the truck exceeds the maximum range of the weighing device, when the artificial magnet 21 contacts the Hall element 11 downward, the spring 27 is compressed, which can avoid damage caused by a hard collision between the artificial magnet 21 and the Hall element 11.

[0028] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model.

Claims

1. A truck weighing device, the truck includes an axle, the axle is connected to the beam through a shock absorbing mechanism, when the beam bears the load, the shock absorbing mechanism is compressed and approaches the axle, characterized in that: It comprises a first guide rod connected to a truck beam, a second guide rod connected to a vehicle axle, and an end of the first guide rod away from the vehicle axle is arranged in a first cavity formed inside the first guide rod; The first cavity is provided with a Hall element, an artificial magnet and a gradient magnetic field constructed by the artificial magnet. One end of the artificial magnet is connected to an end of the second guide rod away from the axle. When the beam bears the load, the first guide rod drives the artificial magnet to approach the Hall element.

2. A truck weighing device according to claim 1, characterized in that: A first guide sleeve connected to a second guide rod is disposed in the first cavity, and the second guide rod can move along the first guide sleeve so that the artificial magnet approaches or moves away from the Hall element.

3. A truck weighing device according to claim 2, characterized in that: A second cavity is formed inside the second guide rod, and a second guide sleeve is arranged inside the second cavity; the artificial magnet is connected to the second guide sleeve via a third guide rod.

4. A truck weighing device according to claim 3, characterized in that: A limit block is arranged at the upper end of the third guide rod, and the limit block is arranged at the upper end of the second guide sleeve; The lower end of the third guide rod is connected with a fixing seat, and the artificial magnet is fixedly arranged on the fixing seat.

5. A truck weighing device according to claim 4, characterized in that: A spring is sleeved on the third guide rod, the upper end of the spring is connected to the second guide sleeve, and the lower end of the spring is connected to the fixing seat.

6. A truck weighing device according to claim 1, characterized in that: The first guide rod is connected to the axle through the first base, and the first guide rod and the first base are rotatably connected; The second guide rod is connected to the truck beam through the second base, and the second guide rod is rotatably connected to the second base.

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