A vehicle hood force measuring instrument

Abstract

The present invention provides a vehicle hood force measuring instrument, comprising a first connection part, a second connection part, a data recording device and a torque sensor located between the first connection part and the second connection part, wherein the first connection part is connected to the hood lock, the front part of the torque sensor is fixed on the first connection part, the rear part of the torque sensor is fixed on the second connection part, the second connection part is connected to the bumper, and the data recording device is connected to the torque sensor. During the automobile rollover pre-treatment process, the magnitude of the force applied to the hood due to the rollover is measured, and the rollover speed limit value that causes the hood to deform is found. In the subsequent process, the hood is rolled over at a speed close to the limit value, while avoiding the deformation of the hood, the maximum production efficiency can be guaranteed, and whether the hood is qualified can be detected. At the same time, the influence of variables such as different connection methods and hood opening angles on the force condition of the hood can be evaluated, providing an important reference for solving the deformation of the hood.

Description

Technical Field

[0001] The invention relates to the field of automobile coating pre-treatment, in particular to an automobile engine hood force measuring instrument. Background Art

[0002] The pretreatment process of automobile painting is an important step in the automobile production process. It can improve the corrosion resistance of the inner and outer surfaces of the automobile, extend the service life of the automobile, and play a basic protective role for the metal materials of the automobile body. Usually, there are two types of automobile pretreatment movement: 1. Boat-shaped holding type, in which the body of the automobile basically runs horizontally during the entire pretreatment process, and only has a certain angle when entering and exiting the tank; 2. Rolling pretreatment, the process is to first fix the car on the flip device in the rolling pretreatment tank, and then control the flipping device to flip so as to drive the car to flip, and finally make the car completely immersed in the rolling pretreatment tank, and the rolling pretreatment liquid in the rolling pretreatment tank covers the protective layer on the surface of the car body, so as to achieve the purpose of product protection. Compared with the traditional boat-shaped motion pretreatment, because the rolling pretreatment can fully make the body cavity contact with the pretreatment liquid, it can greatly improve the anti-corrosion effect of the body. At present, new automobile production lines are basically rolling pretreatment.

[0003] In the process of tumbling pre-treatment, in order to improve the efficiency of tumbling pre-treatment, it is generally required that the tumbling speed of the tumbling device is as fast as possible, so as to quickly complete the tumbling pre-treatment of the car. However, when the car body is flipped, the hood will be subject to the resistance of the tumbling pre-treatment liquid when entering the tumbling pre-treatment tank. At this time, the greater the tumbling speed, the greater the force of the tumbling pre-treatment liquid on the car hood, which is easy to cause the hood to deform; and in the current design, for the protection of pedestrians and the consideration of lightweight energy saving and emission reduction of the car body, the hood material is gradually transitioned from steel to aluminum alloy material, and the strength becomes lower and lower. Therefore, during the tumbling pre-treatment process of the car body, the deformation of the hood is becoming more and more serious. In order to avoid the deformation of the hood and the loss of materials and working hours, the process personnel will reduce the tumbling speed of the tumbling device, but this will lead to a lower efficiency of the car tumbling pre-treatment.

[0004] Under the condition of ensuring that the deformation of the hood is as small as possible, it is very important to choose the flipping speed and evaluate the effect of the tooling to improve the production efficiency of the body roll-over pre-treatment. Therefore, there is an urgent need for a special instrument to measure the force data of the hood during the roll-over pre-treatment process. Summary of the invention

[0005] The purpose of the present invention is to provide a car hood force measuring instrument to measure the force applied to the hood during the tumbling pre-treatment process, to facilitate the adjustment of the speed of the car's flipping, to quantitatively evaluate the influence of variables such as different tooling types, connection methods and hood opening angles on the stress condition of the hood, and to improve production efficiency while avoiding deformation of the hood.

[0006] The objective of the present invention is achieved through such a technical solution, a car hood force measuring instrument, comprising a first connecting part, a second connecting part, a data recording device and a torque sensor located between the first connecting part and the second connecting part, the first connecting part is connected to the hood lock, the front part of the torque sensor is fixed on the first connecting part, the rear part of the torque sensor is fixed on the second connecting part, the second connecting part is connected to the bumper, and the data recording device is connected to the torque sensor.

[0007] The principle of the present invention is: firstly, the first connection part of the force measuring instrument is fixedly connected to the hood lock, and then the second connection part is fixedly connected to the bumper. The torque sensor collects the force exerted on the hood and transmits it to the data recording device for recording.

[0008] During the automobile tumbling pre-treatment process, the turning device drives the automobile to flip downward. When the hood enters the tumbling pre-treatment tank, the tumbling pre-treatment liquid will exert force on the hood, which can cause the torque sensor in the force measuring instrument located at the front of the hood to deform. The deformation variable generated by the torque sensor is recorded in real time by the data recording device, and the deformation variable is converted into a specific value and recorded in the data recording device. The process personnel analyze and adjust the next tumbling speed of the automobile in the tumbling pre-treatment process through the force data recorded in the data recording device, until the tumbling speed limit that causes the hood of this type of vehicle to deform is found. The limit value is set and recorded so that in the subsequent tumbling pre-treatment of the same type of vehicle, the tumbling device can be controlled to tumble at a tumbling speed lower than the limit value, which can not only ensure that the hood will not be deformed during the tumbling process, but also improve production efficiency. In addition, if the hood of the same type of vehicle is tumbled at the same tumbling speed and deformation occurs, it can be preliminarily judged whether the hood is qualified, providing a standard for the production of the hood. At the same time, it can also quantitatively evaluate the effects of different tooling types, connection methods, hood opening angles and other variables on the stress condition of the hood, providing an important reference for process personnel to optimize the process and tooling design to solve the problem of hood deformation.

[0009] The beneficial effects of the present invention are as follows: by measuring the magnitude of the force applied to the hood due to flipping during the tumbling pre-treatment process, the flipping speed limit that causes the hood to deform is found, and in the subsequent tumbling pre-treatment process, the hood is flipped at a speed close to the limit value, while avoiding deformation of the hood and ensuring maximum production efficiency. It can also preliminarily determine whether the hood is qualified, providing a standard for the production of the hood, and can also be used to evaluate the changes in the stress conditions of the hood caused by different tooling methods, making it convenient for process personnel to quantify the effects of different tooling types and connection methods on the stress, and find the best tooling structure and installation method to improve the deformation of the hood during the tumbling pre-treatment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Attached Figure 1 This is a first structural schematic diagram of an automobile hood force measuring instrument of the present invention.

[0011] Attached Figure 2 This is a second structural schematic diagram of an automobile hood force measuring instrument of the present invention.

[0012] Attached Figure 3 The present invention is a schematic diagram of a locking pin structure of an automobile hood force measuring instrument.

[0013] Attached Figure 4 The present invention discloses a data recording device connection circuit diagram of a vehicle hood force measuring instrument.

[0014] In the figure: 1 first connecting part, 2 second connecting part, 3 torque sensor, 4 data recording device, 5 fixing box, 6 locking pin, 7 locking pin hole, 8 through hole, 9 vertical connecting member, 10 hook, 11 adjusting plate, 12 slide groove, 13 slider, 14 first limiting assembly, 15 first horizontal connecting plate, 16 second horizontal connecting plate, 17 connecting part, 18 first vertical connecting plate, 19 second vertical connecting plate, 20 first strip groove, 21 second limiting assembly, 22 third vertical connecting plate, 23 limiting plate, 24 second strip groove, 25 third limiting assembly, 26 accommodating part, 27 fixing rod, 28 tilting plate, 29 locking ring, 30 fixing plate, 31 locking rod. DETAILED DESCRIPTION

[0015] The following is a further description of the automobile hood force measuring instrument of the present invention in conjunction with the accompanying drawings and specific embodiments.

[0016] The present invention discloses a vehicle hood force measuring instrument, comprising a first connecting part 1, a second connecting part 2, a data recording device 4 and a torque sensor 3 located between the first connecting part 1 and the second connecting part 2, wherein the first connecting part 1 is connected to a hood lock, the front part of the torque sensor 3 is fixed on the first connecting part 1, the rear part of the torque sensor 3 is fixed on the second connecting part 2, the second connecting part 2 is connected to a bumper, and the data recording device 4 is connected to the torque sensor 3.

[0017] The principle of the present invention is that the first connection part 1 of the force measuring instrument is first fixedly connected to the hood lock, and then the second connection part 2 is fixedly connected to the bumper. The torque sensor 3 collects the force applied to the hood and transmits it to the data recording device 4 for recording.

[0018] The data recording device 4 can be connected to the torque sensor 3 via a wired or wireless connection.

[0019] In the present application, the torque sensor 3 can be a dynamic torque sensor or a static torque sensor; the dynamic torque sensor will adopt strain gauge electrical measurement technology to form a strain bridge on the elastic shaft. By providing power to the strain bridge, the electrical signal of the deformation of the elastic shaft due to the pressure of the tumbling pretreatment liquid can be measured. After amplifying the deformation signal, it is converted into a frequency signal proportional to the deformation through voltage / frequency conversion. The torque sensor can be the HCNJ-101 model dynamic torque sensor of Beijing Haibohua Technology Co., Ltd.; the static torque sensor is an instrument that converts the strain generated by the torsional torque into an electrical signal linearly related to it based on the resistance strain principle. The static torque sensor can be the LTN-B model static sensor of Beijing Longxiang Tianli Sensing Measurement Technology Co., Ltd.

[0020] In the present application, the data recording device 4 is composed of a power supply, a control switch, a data conversion module, a data processing module and a storage card. The data conversion module, the data processing module and the storage card are connected in sequence, and the data conversion module, the data processing module and the storage card are all connected to the power supply and the control switch; wherein the data conversion module can be a data conversion module of the HX711 or MK-ZL-485 model, and the data processing module can be a data processing module of the Arduino UnoRv3 or the 7188 model produced by Yibang Wanda Technology Co., Ltd.

[0021] During the automobile rollover pretreatment process, the turning device drives the automobile to turn downward, and the rolling pretreatment liquid generates a force on the hood, causing the torque sensor 3 to deform. The data recording device 4 records the deformation amount of the torque sensor in real time, and converts the deformation amount into a specific value and records it in the device. The process personnel analyze and adjust the turning speed of the automobile in the rollover pretreatment process next time through the force data recorded in the data recording device 4, until the turning speed limit value that causes the hood of this type of vehicle to deform is found and recorded. In the subsequent rollover pretreatment of the same type of vehicle, the turning device is controlled to turn at a turning speed close to the limit value, which can not only ensure that the hood will not deform during the turning process, but also improve production efficiency. In addition, if the hood of the same type of vehicle turns at the same turning speed and deforms, it can also be preliminarily judged whether the hood is qualified, which provides a standard for the production of the hood. At the same time, it can also quantitatively evaluate the effect of different tooling types, connection methods, hood opening angles and other variables on the force condition of the hood, which provides an important reference for the process personnel to optimize the process and tooling design to solve the hood deformation.

[0022] Furthermore, in order to ensure a stable connection between the first connecting part 1 and the hood, the first connecting part 1 includes a fixing box 5 and a locking pin 6; a through hole 8 matching the hood lock buckle is provided on the top of the fixing box 5, and the through hole 8 can be integrally formed with the fixing box 5 or formed by stamping. The hood lock buckle is inserted into the through hole 8 for easy connection, and its structure is simple and easy to disassemble; locking pin holes 7 matching the locking pin 6 are provided on both sides. In order to match the locking pin 6, the locking pin holes 7 are formed by stamping, and the locking pin 6 passes through the locking pin holes 7 on both sides to fix the fixing box 5 to the hood lock buckle; when connecting, first insert the lock buckle of the hood into the through hole 8 on the upper part of the fixing box 5, and then insert the locking pin 6 into the locking pin hole 7 on the fixing box 5, and fix the locking pin 6 to one side of the fixing box 5 by bolts, and the locking pin 6 passes through the hood lock buckle to fix the fixing box 5 to the hood lock buckle, thereby ensuring the stability of the connection between the first connecting part 1 and the hood lock buckle.

[0023] The locking pin 6 includes an integrally formed locking ring 29, a fixing plate 30 and a locking rod 31; in the process of overturning the car, in order to prevent the locking pin 6 from being easily loosened and causing the fixing box 5 to fall off the hood lock buckle, three locking rods 31 of the locking pin 6 are integrally provided, and three locking pin holes 7 matching the locking rods 31 of the locking pin 6 are also provided. The cross-section formed by the locking pin holes 7 is triangular, and the three locking rods 31 are all inserted into the hood lock buckle, so that the connection between the locking pin 6 and the fixing box 5 is more stable, thereby making the connection between the fixing box 5 and the hood lock buckle more stable.

[0024] Furthermore, in order to support the hood and to stabilize the connection between the force measuring instrument and the bumper, the second connecting part 2 of the hood includes a vertical connecting member 9 and a hook 10 arranged at the bottom of the vertical connecting member 9 and matching the bumper; the hook 10 can be integrally formed with the vertical connecting member 9, or it can be fixed to the bottom of the vertical connecting member 9 by bonding, welding or threaded assembly. The hook 10 is engaged with the bottom of the bumper, and the connection structure between the force measuring instrument and the bumper is simple, convenient to connect, and easy to disassemble.

[0025] Furthermore, in order to adapt to the height of the hood and the bumper and facilitate connection, an adjustment plate 11 is also included between the torque sensor 3 and the second connecting part 2; the position of the hood lock buckle of each vehicle model is different. In order to adapt to the position of the hood lock buckle and facilitate the connection of the force measuring instrument with the hood, a slide groove 12 is provided on the adjustment plate 11, and the slide groove 12 and the adjustment plate 11 are integrally formed. In order to enable the torque sensor 3 to slide on the adjustment plate 11, a slider 13 is provided at the bottom of the torque sensor 3. The torque sensor 3 can be connected to the slider 13 by bonding, threaded components or other connection methods familiar to those skilled in the art; the slider 13 is connected to the slide groove 12 through a first limiting component 14 that matches the slide groove 12. When the fixing box 5 of the first connecting part 1 is connected to the hood lock buckle, the slider 13 can slide back and forth on the slide groove 12 of the adjustment plate 11 through the first limiting component 14. When adjusted to a suitable position, the first limiting component 14 Fixed at the bottom end of the slide groove 12, when the slider 13 slides back and forth on the slide groove 12, the torque sensor 3 and the first connecting part 1 connected to the front part of the torque sensor 3 can be driven to slide back and forth, so as to adjust the position of the fixing box 5 and the hood lock buckle, so that it can be suitable for different car models; in order to prevent the slider 13 from falling off when sliding in the slide groove 12, the number of the slide grooves 12 can be 2, 3 or 4, or 5, 6 or 7, or 8, 9 or 10, and the number of the first limiting components 14 matching the slide grooves 12 can be 2, 3 or 4, or 5, 6 or 7, or 8, 9 or 10. The first limiting component 14 can be a bolt limiting component composed of a bolt, a nut matching the bolt and a washer, or a locking ring limiting component composed of a threaded locking ring and a nut matching the threaded locking ring; the slide groove 12 also has a guiding function during the sliding process.

[0026] Furthermore, the vertical connecting member 9 includes a first transverse connecting plate 15, a second transverse connecting plate 16 and a connecting portion 17 arranged between the first transverse connecting plate 15 and the second transverse connecting plate 16; the connecting portion 17 includes a first vertical connecting plate 18 fixed at both ends of the first transverse connecting plate 15 and a second vertical connecting plate 19 fixed at both ends of the second transverse connecting plate 16, and the first vertical connecting plate 18 and the second vertical connecting plate 19 can be respectively fixed to the first transverse connecting plate 15 and the second transverse connecting plate 16 by bonding, welding or threaded assembly connection; the bumper height of each vehicle model is inconsistent. In order to adapt to different vehicle models, the first vertical connecting plate 18 and / or the second vertical connecting plate 19 are provided with a first strip groove 20, and the first strip groove 20 is integrally formed with the first vertical connecting plate 18 and / or the second vertical connecting plate 19, and the first vertical connecting plate 18 and the second vertical connecting plate 19 are connected by a second limiting assembly 21 matching the first strip groove 20, and the number of the second limiting assemblies 21 can be The number of the second limiting components 21 may be 1, 2 or 3, or 4, 5 or 6, or 7, 8 or 9. The second limiting component 21 may be a bolt limiting component composed of a bolt, a nut matching the bolt and a washer, or a locking ring limiting component composed of a threaded locking ring and a nut matching the threaded locking ring; a first strip groove 20 is provided on the first vertical connecting plate 18; a first strip groove 20 is provided on the second vertical connecting plate 19; a first strip groove 20 is provided on the left side of the first vertical connecting plate 18 and the right side of the second vertical connecting plate 19; a first strip groove 20 is provided on the right side of the first vertical connecting plate 18 and the left side of the second vertical connecting plate 19; three first strip grooves 20 are provided on the first vertical connecting plate 18 and the second vertical connecting plate 19; four first strip grooves 20 are provided on the first vertical connecting plate 18 and the second vertical connecting plate 19; the second vertical connecting plate 19 is slid up and down to adjust the relative height between the first vertical connecting plate 18 and the second vertical connecting plate 19, so as to be suitable for bumpers of different models.

[0027] In order to facilitate the connection between the second connecting part 2 and the automobile bumper, after the rollover pre-treatment is completed, it is convenient to disassemble the second connecting part 2 from the automobile bumper, a fixing rod 27 is provided on one side of the first transverse connecting plate 15, and a hook 10 matching the bumper is provided on one side of the second transverse connecting plate 16; the fixing rod 27 and the hook 10 can be fixed to the first transverse connecting plate 15 and the second transverse connecting plate 16 respectively by bonding, threaded assembly or integral molding. In order to make the connection between the fixing rod 27 and the hook 10 and the first transverse connecting plate 15 and the second transverse connecting plate 16 more stable, the fixing rod 27 and the hook 10 can be fixed to the first transverse connecting plate 15 and the second transverse connecting plate 16 respectively by bonding, threaded assembly or integral molding. 27 and the hook 10 are fixed to the first transverse connecting plate 15 and the second transverse connecting plate 16 respectively by an integral molding manner; when in use, the fixing rod 27 is directly hung on the upper end of the bumper, and the hook 10 is clamped on the lower end of the bumper, so that the second connecting part 2 of the force measuring instrument is fixedly connected to the automobile bumper; in order to make the connection between the second connecting part 2 and the bumper more stable, the number of the fixing rod 27 and the hook 10 can be 1, 2 or 3, or 4, 5 or 6, or 7, 8 or 9, so that the force measuring instrument is not easy to fall off during the overturning of the automobile.

[0028] An integrally formed inclined plate 28 is also provided between the first transverse connecting plate 15 and the first vertical connecting plate 18. An inverted "U" shape is formed between the first transverse connecting plate 15, the inclined plate 28 and the first vertical connecting plate 18. During the rollover of the automobile, the pressure of the force measuring instrument on the bumper can be dispersed and the weight of the force measuring instrument can be reduced.

[0029] Furthermore, a third vertical connecting plate 22 is provided at the bottom of the adjusting plate 11, and the vertical connecting member 9 also includes a limiting plate 23 connected to the third vertical connecting plate 22; the third vertical connecting plate 22 can be integrally formed with the adjusting plate 11, and can also be fixed to the bottom of the adjusting plate 11 by means of a threaded assembly or the like; in order to adjust the height between the adjusting plate 11 and the vertical connecting member 9, so as to be suitable for different vehicle models, the third vertical connecting plate 22 and / or the limiting plate 23 are provided with an integrally formed second strip groove 24, and the third vertical connecting plate 22 and the limiting plate 23 are slidably connected by a third limiting assembly 25 matching the second strip groove 24; the third vertical connecting plate 22 is provided with an integrally formed second strip groove 24, and the limiting plate 23 is provided with an integrally formed The second strip groove 24 of the third vertical connecting plate 22 and the limiting plate 23 are both provided with an integrally formed second strip groove 24; the limiting plate 23 is slid up and down to adjust the relative height between the third vertical connecting plate 22 and the limiting plate 23 to match the position of the hood lock buckle, so as to be suitable for different vehicle models; in order to make the connection between the third vertical connecting plate 22 and the limiting plate 23 more stable, the number of the third limiting components 25 can be 1, 2 or 3, or 4, 5 or 6, or 7, 8 or 9, and the third limiting component 25 can be a bolt limiting component composed of bolts, nuts matching the bolts and washers, or it can be a locking ring limiting component composed of a threaded locking ring and a nut matching the threaded locking ring.

[0030] The cross-section of the limiting plate 23 is "L"-shaped, and during the flipping process, it prevents the third vertical connecting plate 22 from being offset due to the pressure of the hood, and has a limiting function; the bottom end of the limiting plate 23 is inclined and fixedly connected to the first transverse connecting plate 15 by means of a threaded assembly or welding, and its function is to reduce the resistance of the tumbling pretreatment liquid to the force measuring instrument during the flipping process, and to facilitate the connection with the first transverse connecting plate 15.

[0031] Furthermore, a housing portion 26 is provided at the lower end of the adjustment plate 11. The housing portion 26 can be integrally formed with the adjustment plate 11, or can be fixed to the lower end of the adjustment plate 11 by means of a threaded assembly or the like. The data recording device 4 is placed in the housing portion 26. In order to save materials and reduce the weight of the force measuring instrument, the housing portion 26 is configured to be hollow. The data recording device 4 can be fixed in the housing portion 26, or can be placed in the housing portion 26 by binding.

Claims

1. A vehicle hood force measuring instrument, characterized in that: The invention comprises a first connection part (1), a second connection part (2), a data recording device (4), and a torque sensor (3) located between the first connection part (1) and the second connection part (2); the first connection part (1) is connected to the engine hood lock, the front part of the torque sensor (3) is fixed to the first connection part (1), the rear part of the torque sensor (3) is fixed to the second connection part (2), the second connection part (2) is connected to the bumper, and the data recording device (4) is connected to the torque sensor (3); The first connecting portion (1) comprises a fixing box (5) and a locking pin (6); a through hole (8) matching the hood lock buckle is provided on the top of the fixing box (5), and locking pin holes (7) matching the locking pin (6) are provided on both sides; the locking pin (6) passes through the locking pin holes (7) on both sides to fix the fixing box (5) on the hood lock buckle; The second connecting portion (2) comprises a vertical connecting member (9) and a hook (10) provided at the bottom of the vertical connecting member (9) and matching with the bumper.

2. The automobile hood force measuring instrument according to claim 1, characterized in that: An adjustment plate (11) is also provided between the torque sensor (3) and the second connecting portion (2), a slide groove (12) is provided on the adjustment plate (11), a slider (13) is provided at the bottom of the torque sensor (3), and the slider (13) is connected to the slide groove (12) via a first limit assembly (14) that matches the slide groove (12).

3. The automobile hood force measuring instrument according to claim 1 or 2, characterized in that: The vertical connecting member (9) comprises a first transverse connecting plate (15), a second transverse connecting plate (16), and a connecting portion (17) arranged between the first transverse connecting plate (15) and the second transverse connecting plate (16); the connecting portion (17) comprises a first vertical connecting plate (18) fixed at two ends of the first transverse connecting plate (15) and a second vertical connecting plate (19) fixed at two ends of the second transverse connecting plate (16); a first strip groove (20) is provided on the first vertical connecting plate (18) and / or the second vertical connecting plate (19); the first vertical connecting plate (18) and the second vertical connecting plate (19) are connected via a second limiting assembly (21) matching the first strip groove (20).

4. The automobile hood force measuring instrument according to claim 2, characterized in that: A third vertical connecting plate (22) is provided at the bottom of the adjusting plate (11), and the vertical connecting member (9) further comprises a limiting plate (23) connected to the third vertical connecting plate (22).

5. The automobile hood force measuring instrument according to claim 2 or 4, characterized in that: A receiving portion (26) is provided under the adjustment plate (11), and the data recording device (4) is placed in the receiving portion (26).

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