阅读说明：本技术 一种纯电动轻卡的牵引力测量装置 (Traction force measuring device of pure electric light truck ) 是由 陆志伟 吴楠 贺欣乔 张广会 孙宁宁 王静 余晓衡 李鑫 于 2019-11-25 设计创作，主要内容包括：本发明公开了一种纯电动轻卡的牵引力测量装置,包括主车连接板、前U型销、硬杆、后U型销、保护模块和辅助车连接板,硬杆前端通过前U型销连接主车连接板,保护模块一端通过后U型销连接硬杆后端,保护模块另一端通过螺栓连接辅助车连接板,主车连接板和辅助车连接板上均设有螺栓孔。当处于牵引模式时,用保护模块替换拉力传感器；当进行牵引力测量时,卸下保护模块换装成拉力传感器,拉力传感器一端通过U型销连接硬杆后端,另一端通过连接销连接辅助车连接板。本发明安装简单,对于底盘改装小,而且测量装置具备牵引和测量两种模式,方便试验车的转场移动,本发明可以适应不同类型的纯电动轻卡的底盘。(The invention discloses a traction force measuring device of a pure electric light truck, which comprises a main truck connecting plate, a front U-shaped pin, a hard rod, a rear U-shaped pin, a protection module and an auxiliary truck connecting plate, wherein the front end of the hard rod is connected with the main truck connecting plate through the front U-shaped pin, one end of the protection module is connected with the rear end of the hard rod through the rear U-shaped pin, the other end of the protection module is connected with the auxiliary truck connecting plate through a bolt, and bolt holes are formed in the main truck connecting plate and the auxiliary truck connecting plate. Replacing the tension sensor with a protection module when in the traction mode; when traction force is measured, the protection module is dismounted and replaced by a tension sensor, one end of the tension sensor is connected with the rear end of the hard rod through a U-shaped pin, and the other end of the tension sensor is connected with an auxiliary vehicle connecting plate through a connecting pin. The invention has simple installation and small chassis modification, and the measuring device has two modes of traction and measurement, thereby being convenient for transition movement of the test vehicle.)

1. A traction force measuring device of a pure electric light truck is characterized by comprising a main truck connecting plate, a front U-shaped pin, a hard rod, a rear U-shaped pin, a protection module and an auxiliary truck connecting plate; the front end of the hard rod is connected with a main vehicle connecting plate through a front U-shaped pin, the rear end of the hard rod is connected with a protection module through a rear U-shaped pin 4, and the other end of the protection module is connected with an auxiliary vehicle connecting plate through a bolt.

2. The traction force measuring device of the pure electric light truck as claimed in claim 1, wherein the main truck connecting plate and the auxiliary truck connecting plate are both provided with bolt holes.

3. The traction force measuring device of the pure electric light truck as claimed in claim 1, wherein when traction force measurement is performed, the protection module is detached and replaced with a tension sensor, one end of the tension sensor is connected with the rear end of the hard rod through a U-shaped pin, and the other end of the tension sensor is connected with an auxiliary truck connecting plate through a connecting pin.

Technical Field

The invention belongs to the technical field of tests of road performance tests of commercial vehicles, and particularly relates to a traction force measuring device in the running process of a pure electric light truck.

Background

Aiming at the inconsistency of road thermal balance test methods, the thermal balance test of the medium and heavy trucks adopts a torque point working condition requiring device to be reliably connected but does not require traction measurement. The thermal balance test of the light truck adopts a climbing working condition, and requires that the connecting structure can be provided with a tension sensor to measure the traction force and calculate the simulated gradient and power.

Due to the consideration of safety factors, the pure electric light truck climbing test cannot be carried out in an environment bin, and the light truck climbing driving test needs to be simulated on a performance road of a test field in the light truck development process. In the test process, the front vehicle and the rear vehicle generally run simultaneously, the rear vehicle applies equivalent resistance force during climbing to the front vehicle (test vehicle) through braking, and the water temperature result of the cooling system is obtained by measuring traction force, calculating running power and simulating gradient.

The pure electric light card is connected with the front vehicle and the rear vehicle through the steel wire rope in the simulated climbing test process. The connection mode causes large measurement error of the swinging displacement of the tension sensor, and the safety of people and vehicles is easily influenced after the steel wire rope is broken.

Disclosure of Invention

Aiming at the requirements of a heat balance test of the light truck, the traction force measuring device for the pure electric light truck is simple to install and small in chassis refitting, has two modes of traction and measurement, and is convenient for transition movement of a test vehicle. Meanwhile, the invention adopts modular design and installation, can adapt to the chassis of pure electric light cards of different types, and improves the working efficiency.

The purpose of the invention is realized by the following technical scheme:

a traction force measuring device of a pure electric light truck comprises a main truck connecting plate, a front U-shaped pin, a hard rod, a rear U-shaped pin, a protection module and an auxiliary truck connecting plate; the front end of the hard rod is connected with a main vehicle connecting plate through a front U-shaped pin, the rear end of the hard rod is connected with a protection module through a rear U-shaped pin 4, and the other end of the protection module is connected with an auxiliary vehicle connecting plate through a bolt.

Further, bolt holes are formed in the main vehicle connecting plate 1 and the auxiliary vehicle connecting plate.

Further, when traction force measurement is carried out, the protection module is disassembled and replaced by a tension sensor, one end of the tension sensor is connected with the rear end of the hard rod through a U-shaped pin, and the other end of the tension sensor is connected with an auxiliary vehicle connecting plate through a connecting pin.

Compared with the prior art, the invention has the following advantages:

fixed with whole car through the connecting piece, hard pole is used for connecting two cars to offset the influence that tension sensor rocked, guarantee test car and personnel's safety.

The chassis of the pure electric light card of different types can be adapted by adopting modular design and installation, and the working efficiency is improved.

When the test is prepared, the rear protection of the front vehicle and the traction hook of the rear vehicle are detached, and different connecting plates are replaced aiming at different chassis, so that the installation can be realized.

In the transition moving process of the test vehicle, in order to protect the tension sensor, the protection module is specially designed to replace the tension sensor, and when traction force measurement is carried out, the protection module is detached to replace the tension sensor.

Drawings

Fig. 1 is a schematic structural diagram of a traction force measuring device of a pure electric light truck according to the present invention.

In the figure: 1-main vehicle connecting plate; 2-front U-shaped pin; 3-hard rod; 4-rear U-shaped pin; 5-a protection module; 6-auxiliary vehicle connecting plate.

Detailed Description

The technical scheme of the invention is described in detail in the following with reference to the attached drawings:

as shown in fig. 1, a traction force measuring device for a pure electric light truck includes: the main car connecting plate comprises a main car connecting plate 1, a front U-shaped pin 2, a hard rod 3, a rear U-shaped pin 4, a protection module 5 and an auxiliary car connecting plate 6. Hard 3 front ends of pole pass through preceding U type round pin 2 and connect main car connecting plate, and 5 one ends of protection module pass through 3 rear ends of back U type round pin joint hard pole, and the 5 other ends of protection module pass through bolted connection auxiliary vehicle connecting plate 6, all are equipped with the bolt hole on main car connecting plate 1 and the auxiliary vehicle connecting plate 6.

When the tractor is in a traction mode (a transition moving process of two tractors after installation is finished), the protection module 5 is used for replacing the tension sensor; when traction force is measured, the protection module 5 is dismounted and replaced by the tension sensor, one end of the tension sensor is connected with the rear end of the hard rod 3 through the U-shaped pin, the other end of the tension sensor is connected with the auxiliary vehicle connecting plate 6 through the connecting pin, and the protection module 5 is positioned in front of a cab of a rear vehicle, so that the rear signal wire of the tension sensor is convenient to connect, and a driver can conveniently observe when a problem occurs.

The front U-shaped pin 2 and the rear U-shaped pin 4 are required to select proper types according to the measuring range of the tension sensor to protect the tension sensor, and M10 or M12U-shaped pins are generally recommended.

The working principle of the invention is as follows:

the rear protection of the front vehicle is disassembled, and the main vehicle connecting plate 1 is fixed on a test vehicle (front vehicle) through bolts; the towing hook of the rear vehicle is detached, and the auxiliary vehicle connecting plate 6 is fixed on the test vehicle (the rear vehicle) through bolts. In order to facilitate the disassembly and assembly, the protection module 5 is connected with the auxiliary vehicle connecting plate 6 through bolts.