Stress application measuring device for automobile rear protection

Abstract

The utility model discloses a stress application measuring device for automobile rear protection, which comprises a frame and a moving mechanism, and the moving mechanism is mounted on the frame. The balancing weights are stacked at the front end of the frame in the vertical direction; the fixing mechanism comprises two limiting rods, the two limiting rods are installed on the frame and located on the two sides of the balancing weights respectively, the length of the two limiting rods is set in the vertical direction, grooves are formed in the two sides of each balancing weight respectively, and the two limiting rods can be connected with the adjacent grooves in a clamped mode respectively; the vertically stacked balancing weights are used for simulating the conditions of vehicles with different loads and heights, meanwhile, the clamping design of the limiting rods and the grooves in the balancing weights is combined, stable stacking and adjustable height of the balancing weights are ensured, accordingly, vehicle tail collision tests under different weight and height conditions are simulated, the test accuracy and practicability are improved, and the test efficiency is improved. The application range is widened, the structure is simple, adjustment is convenient, and stability and flexibility are good.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile collision tests, in particular to a force measurement device for automobile rear protection. Background Art

[0002] As an indispensable means of transportation in modern society, cars have greatly promoted people's daily travel and economic development. However, their widespread use is also accompanied by the problem of frequent traffic accidents, posing a serious threat to people's life safety. In order to reduce and lower the threats posed by accidents, relevant departments have introduced automobile safety standards and regulations. Through strict design specifications and technical requirements, the safety performance of automobiles is fundamentally improved, providing drivers and passengers with a safer travel environment.

[0003] In automobile safety testing, simulated automobile crash tests are widely used as a highly realistic testing method to evaluate the crashworthiness of vehicle structures, occupant protection capabilities and failure modes of key components under extreme collision conditions. These tests usually include different types of tests such as frontal collisions, side collisions, and roof strength, simulating a variety of possible collision scenarios to discover potential problems in vehicle design, thereby improving the vehicle's structural design, enhancing the vehicle's safety performance in accidents, and minimizing the possibility of passenger injury. The results of crash tests are not only one of the important indicators for evaluating a car's safety performance, but also an important reference for consumers when choosing a car.

[0004] However, current automobile crash tests mainly focus on front and side collision tests of automobiles, while rear-end collision tests are relatively rare. The incompleteness of the tests leads to the neglect of some safety issues that may arise in rear-end collisions. In addition, the number and height of the counterweight blocks at the front end of the collision vehicle used in existing automobile crash tests are fixed, making it difficult to simulate the data after collisions of vehicles of different heights and weights, thereby limiting the accuracy and practicality of the tests. Utility Model Content

[0005] The purpose of the utility model is to provide a force measurement device for automobile rear protection, so as to solve the problems in the prior art of incomplete testing during automobile collision tests, the non-adjustable number and height of counterweight blocks, which lead to the inability to be universally used among vehicles of different heights and weights, limiting the accuracy and practicality of the test and having a narrow scope of application.

[0006] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0007] A force measuring device for rear protection of an automobile, comprising:

[0008] A frame and a moving mechanism, wherein the moving mechanism is mounted on the frame and is used to drive the frame to move;

[0009] At least one counterweight, each of the counterweights being stacked vertically on a front end of the frame;

[0010] The fixing mechanism includes two limit rods, which are installed on the frame and are respectively located on both sides of the counterweight block. The lengths of the two limit rods are set in the vertical direction. Grooves are formed on both sides of each counterweight block, and the two limit rods can be respectively engaged with adjacent grooves.

[0011] According to the above technical means, flexible and convenient movement is achieved through the moving mechanism on the frame, and vertically stacked counterweights are used to simulate vehicle conditions with different loads and heights. At the same time, the clamping design of the limit rod in the fixing mechanism and the groove on the counterweight is combined to ensure the stable stacking and adjustable height of the counterweight, thereby simulating vehicles with different weights and heights to carry out force tests for rear-end collisions, improving the accuracy and practicality of the test, and broadening the scope of application. It has a simple structure, convenient adjustment, good stability and flexibility.

[0012] Furthermore, the fixing mechanism also includes a lifting bracket, which is installed on the vehicle frame, and the bottom ends of the two limit rods are respectively fixed on the lifting bracket. The lifting bracket is configured to drive the two limit rods to rise and fall in the vertical direction so that the two limit rods are respectively engaged with or separated from adjacent grooves.

[0013] According to the above technical means, the two limit rods are installed on the vehicle frame through lifting brackets and can be lifted and lowered in the vertical direction, so that the limit rods can be accurately and quickly engaged with the grooves on both sides of the counterweight blocks to achieve stable stacking of the counterweight blocks; at the same time, the limit rods can also be separated from the grooves as needed, which is convenient for adding, removing and adjusting the counterweight blocks, thereby improving the stability and adjustability of the counterweight block stacking, with good stability, high flexibility, easy adjustment and convenient installation, further improving the accuracy and practicality of the rear-end collision force test.

[0014] Furthermore, the fixing mechanism also includes an extrusion plate and a limit plate, the two ends of the extrusion plate are respectively slidably mounted on the two limit rods, the limit plate is fixed to the top end of the two limit rods, and the two limit rods are both provided with a spring, the two ends of the spring are respectively fixed on the extrusion plate and the limit plate, and the extrusion plate can abut against the counterweight block located at the top end.

[0015] According to the above technical means, the extrusion plate is limited above the counterweight by a spring. During installation, the extrusion plate can generate a certain extrusion force on the counterweight at the top under the action of the spring, thereby enhancing the stability of the counterweight and preventing it from shaking or falling off during the test. It has high flexibility. At the same time, the combination of the extrusion plate and the spring also has certain buffering and shock-absorbing functions, which can absorb the impact force generated by the collision to a certain extent, protect the fixing mechanism and the counterweight from damage, improve the accuracy and safety of the test, and extend the overall service life of the device.

[0016] Furthermore, the fixing mechanism also includes a motor, a threaded rod and two guide rods. The bottom end of the threaded rod is rotatably mounted on the frame, and the top end is connected to the motor. The two guide rods are arranged in parallel, and the bottom ends are fixed to the frame. The motor is fixed to the top ends of the two guide rods through a mounting plate. The lifting bracket is slidably mounted on the two guide rods and is threadedly connected to the threaded rod.

[0017] According to the above technical means, the threaded rod is driven by a motor and, under the guidance of the two guide rods, the lifting bracket is driven to rise and fall, thereby causing the two limit rods and the extrusion plate to rise and fall to install or remove the counterweight block, and the operation is convenient. Specifically, when the motor is started, the threaded rod will rotate accordingly, and the lifting bracket is driven to slide and rise and fall on the two guide rods through a threaded connection, thereby driving the limit rod and the extrusion plate to rise and fall, so as to increase or decrease the number of counterweight blocks, realize precise adjustment of height and weight, improve the stability and accuracy of lifting, have a simple structure, easy operation, and improve work efficiency.

[0018] Furthermore, it also includes two L-shaped support frames, each of which includes a support cross bar and a support vertical bar. The two support cross bars are arranged in parallel, and the two support vertical bars are fixed to the front end of the frame. Each counterweight block is stacked on the two support cross bars in the vertical direction and can abut against the support vertical bars.

[0019] According to the above technical means, an L-shaped support frame composed of supporting vertical rods and supporting horizontal rods provides a stable stacking platform for the counterweight blocks. It not only has good support stability, but also can prevent the counterweight blocks from sliding or tipping over when simulating high loads or conducting high-intensity acceleration collision tests, thereby improving the accuracy and safety of the test.

[0020] Furthermore, it also includes a support tray, which is fixed on the two support cross bars, and each of the counterweights is stacked on the support tray in a vertical direction.

[0021] According to the above technical means, the support tray is fixed on two supporting cross bars, providing a flat and stable bearing surface for the stacked counterweight blocks, which not only ensures the stability of the stacking of the counterweight blocks, but also makes the entire device more neat and orderly in appearance.

[0022] Furthermore, a reinforcing rod is fixed on each of the two supporting vertical rods. The two reinforcing rods are arranged at an angle, and one end thereof away from the supporting vertical rod is fixed on the vehicle frame.

[0023] According to the above technical means, a stable triangular support structure is formed by supporting the vertical support rod and the frame through the inclined reinforcement rod, which can disperse and resist the pressure from the counterweight block during the collision test, thereby enhancing the load-bearing capacity and stability of the entire device and ensuring the reliability and accuracy of the test results.

[0024] Furthermore, the number of reinforcing rods connected to the supporting vertical rod is 2 or more, and the reinforcing rods are evenly distributed along the vertical direction.

[0025] According to the above technical means, the number of reinforcing rods is increased between the support vertical rod and the frame, which further enhances the stability and firmness of the support vertical rod, so that it can exhibit higher structural strength and stability when bearing heavy loads or conducting high-intensity tests, thereby extending the service life of the device.

[0026] Furthermore, the moving mechanism includes four wheels that are rotatably mounted on the frame through rotating shafts, two of the wheels are symmetrically arranged on both sides of the front end of the frame, and the other two wheels are symmetrically arranged on both sides of the rear end of the frame.

[0027] According to the above technical means, the four wheels are respectively mounted on the frame through rotating shafts, thereby achieving a stable connection with the frame, allowing the frame to move flexibly and stably, thereby improving the efficiency of the collision test.

[0028] Furthermore, the moving mechanism also includes two dual-axis synchronous motors, which are respectively fixed to the front and rear ends of the frame through motor brackets, and the two ends of the two dual-axis synchronous motors are respectively connected to adjacent rotating shafts.

[0029] According to the above technical means, two dual-axis synchronous motors are respectively fixed to the front and rear ends of the frame through motor brackets, and are used to provide precise and synchronous power output to the two opposite wheels, thereby improving the convenience and efficiency of collision testing.

[0030] Beneficial effects achieved by this utility model:

[0031] The utility model realizes flexible and convenient movement through the moving mechanism on the vehicle frame, and utilizes the vertically stacked counterweight blocks to simulate the conditions of vehicles with different loads and heights. At the same time, the clamping design of the limit rod in the fixing mechanism and the groove on the counterweight block is combined to ensure the stable stacking and adjustable height of the counterweight block, so that it can simulate vehicles with different weights and heights to perform force tests for rear-end collisions, thereby improving the accuracy and practicality of the test and broadening the scope of application. It has a simple structure, is easy to adjust, and has good stability and flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0033] Figure 2 This is a structural diagram of the frame and moving mechanism of the utility model;

[0034] Figure 3 This is a schematic diagram of the structure of the mobile mechanism of the utility model;

[0035] Figure 4 This is a structural diagram of the counterweight block and fixing mechanism of the utility model;

[0036] Figure 5 This is a structural diagram of the fixing mechanism of the utility model;

[0037] Figure 6 This is a structural diagram of the counterweight block of the utility model.

[0038] Among them, 1-frame; 21-wheel; 22-rotating shaft; 23-dual-axis synchronous motor; 24-motor bracket; 3-counterweight; 31-groove; 41-limiting rod; 42-lifting bracket; 43-extrusion plate; 44-limiting plate; 45-spring; 46-motor; 47-threaded rod; 48-guide rod; 49-mounting plate; 5-L-shaped support frame; 6-support tray; 7-reinforcement rod.

[0039] The accompanying drawings are for illustrative purposes only and should not be construed as limitations on this patent. To better illustrate this embodiment, some components of the accompanying drawings may be omitted, enlarged, or reduced in size and do not represent the actual dimensions of the product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted from the accompanying drawings. The same or similar reference numerals correspond to the same or similar components. The terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limitations on this patent. DETAILED DESCRIPTION

[0040] It should be noted that, unless there is a conflict, the embodiments in this application and the technical features in the embodiments can be combined with each other. The detailed description in the specific embodiments should be understood as an explanation of the purpose of this application and should not be regarded as an improper restriction on this application.

[0041] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the specific technical solutions of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application but are not intended to limit the scope of the present application.

[0042] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of this application, unless otherwise specified, "multiple" means two or more.

[0043] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integrated connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0044] In the embodiments of the present application, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0045] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0046] The technical solution of the present invention is described in detail below with reference to the accompanying drawings.

[0047] In this embodiment, a force measuring device for rear protection of a car is provided. Figure 1 、 Figure 4 and Figure 6As shown, it includes: a frame 1 and a moving mechanism, the moving mechanism is installed on the frame 1 and is used to drive the frame 1 to move; at least one counterweight block 3, each counterweight block 3 is stacked on the front end of the frame 1 in the vertical direction; a fixing mechanism, the fixing mechanism includes two limit rods 41, the two limit rods 41 are installed on the frame 1, and are respectively located on both sides of the counterweight block 3, the lengths of the two limit rods 41 are set in the vertical direction, and grooves 31 are respectively formed on both sides of each counterweight block 3, and the two limit rods 41 can be respectively engaged with adjacent grooves 31.

[0048] The weight and height of the counterweight 3 of this embodiment are designed according to actual test requirements. In actual application, according to the preset test vehicle height and weight, a corresponding number of counterweights 3 are stacked in the vertical direction to form a collision part to simulate the actual collision situation of the rear end of the vehicle. Specifically, during installation, a predetermined number of counterweights 3 are stacked in the vertical direction so that the grooves 31 on both sides of the collision part are connected in sequence to form a limiting slide groove. The two limiting rods 41 are respectively clamped in the limiting slide grooves on both sides of the collision part to ensure the stability of the counterweight 3 during the collision test. When in use, the moving mechanism drives the frame 1 to move, thereby driving the collision part to simulate the force test of the vehicle rear collision, which improves the accuracy and practicality of the test, broadens the scope of application, and has a simple structure, convenient adjustment, good stability and flexibility.

[0049] In this embodiment, the fixing mechanism also includes a lifting bracket 42, which is installed on the frame 1. The bottom ends of the two limit rods 41 are respectively fixed on the lifting bracket 42. The lifting bracket 42 is configured to drive the two limit rods 41 to rise and fall in the vertical direction so that the two limit rods 41 are respectively engaged with or separated from the adjacent grooves 31.

[0050] This embodiment Figure 4 and Figure 5 As shown, the two limit rods 41 are installed on the frame 1 through the lifting bracket 42, and can drive the two limit rods 41 to move up and down in the vertical direction, so that the limit rods 41 can be accurately and quickly engaged and separated from the grooves 31 on both sides of the counterweight block 3, which is convenient for adding, reducing and adjusting the counterweight block 3, and improves the stability and adjustability of the stacking of the counterweight block 3. Specifically, during actual installation, the lifting bracket 42 is raised to drive the two limit rods 41 to separate from the grooves 31 on the counterweight block 3, so that the number of counterweight blocks 3 can be increased according to actual test requirements; the lifting bracket 42 is lowered to drive the two limit rods 41 to engage with the grooves 31 on the counterweight block 3, so that the counterweight blocks 3 are stably stacked.

[0051] In this embodiment, the fixing mechanism also includes an extrusion plate 43 and a limit plate 44. The two ends of the extrusion plate 43 are respectively slidably mounted on the two limit rods 41. The limit plate 44 is fixed to the top of the two limit rods 41. The two limit rods 41 are both provided with a spring 45. The two ends of the spring 45 are respectively fixed on the extrusion plate 43 and the limit plate 44. The extrusion plate 43 can abut against the counterweight block 3 at the top.

[0052] This embodiment Figure 1 、 Figure 4 and Figure 5 As shown, in actual application, the natural length of the spring 45 is greater than the distance from the counterweight block 3 at the top to the limit plate 44, so that a certain extrusion force can be ensured between the extrusion plate 43 and the counterweight block 3 at the top, so as to further enhance the stability of the counterweight block 3 and prevent it from shaking or falling off during the test. Specifically, when a predetermined number of counterweight blocks 3 are stacked in the vertical direction, the lifting bracket 42 drives the two limit rods 41 to descend, so that the two limit rods 41 are engaged with the adjacent grooves 31. At the same time, the extrusion plate 43 abuts against the counterweight block 3 at the top, compressing the spring 45.

[0053] In this embodiment, the fixing mechanism also includes a motor 46, a threaded rod 47 and two guide rods 48. The bottom end of the threaded rod 47 is rotatably mounted on the frame 1, and its top end is connected to the motor 46. The two guide rods 48 are arranged in parallel, and their bottom ends are fixed to the frame 1. The motor 46 is fixed to the top of the two guide rods 48 through the mounting plate 49. The lifting bracket 42 is slidably mounted on the two guide rods 48 and is threadedly connected to the threaded rod 47.

[0054] This embodiment Figure 4 and Figure 5 As shown, in actual application, the lifting bracket 42 includes a lifting plate and two connecting rods. The two limit rods 41 are fixed to the lifting plate through two connecting rods respectively. The lifting plate is slidably installed on the two guide rods 48 and is threadedly connected to the threaded rod 47. Specifically, during installation, the motor 46 drives the threaded rod 47 to rotate, thereby driving the lifting plate to rise and fall along the length direction of the guide rod 48, thereby driving the limit rod 41 and the extrusion plate 43 to rise and fall, so as to increase or decrease the number of counterweight blocks 3 according to actual test requirements, realize precise adjustment of height and weight, improve the stability and accuracy of lifting, have a simple structure, easy operation, and improve work efficiency.

[0055] In this embodiment, two L-shaped support frames 5 are also included. Both L-shaped support frames 5 include a support cross bar and a support vertical bar. The two support cross bars are arranged in parallel, and the two support vertical bars are fixed to the front end of the frame 1. Each counterweight 3 is stacked on the two support cross bars in the vertical direction and can abut against the support vertical bars.

[0056] This embodiment Figure 4and Figure 5 As shown, the L-shaped support frame 5 composed of supporting vertical rods and supporting horizontal rods provides a stable stacking platform for the counterweight blocks 3, which not only has good support stability, but also can prevent the counterweight blocks 3 from sliding or tipping over when simulating high loads or conducting high-intensity acceleration collision tests, thereby improving the accuracy and safety of the test; further, as a preferred embodiment, it also includes a support tray 6, which is fixed on two supporting horizontal rods, and each counterweight block 3 is stacked on the support tray 6 in the vertical direction, providing a flat and stable bearing surface for the stacked counterweight blocks 3, which not only ensures the stability of the stacking of the counterweight blocks 3, but also makes the entire device more neat and orderly in appearance.

[0057] Furthermore, as a preferred embodiment, a reinforcing rod 7 is fixed on each of the two supporting vertical rods, and the two reinforcing rods 7 are arranged obliquely, and their ends away from the supporting vertical rods are fixed on the frame 1; Figure 5 As shown, a stable triangular support structure is formed by supporting the support vertical rod and the frame 1 through the inclined reinforcement rod 7, which can disperse and resist the pressure from the counterweight block 3 during the collision test, thereby enhancing the load-bearing capacity and stability of the entire device and ensuring the reliability and accuracy of the test results.

[0058] Furthermore, as a preferred embodiment, the number of reinforcing rods 7 connected to the supporting vertical rod is 2 or more, and each reinforcing rod 7 is evenly distributed along the vertical direction; increasing the number of reinforcing rods 7 further enhances the stability and firmness of the supporting vertical rod.

[0059] In this embodiment, the moving mechanism includes four wheels 21 rotatably mounted on the frame 1 via shafts 22 , wherein two wheels 21 are symmetrically arranged on both sides of the front end of the frame 1 , and the other two wheels 21 are symmetrically arranged on both sides of the rear end of the frame 1 .

[0060] This embodiment Figure 2 and Figure 3 As shown, the four wheels 21 are grouped in two and are rotatably mounted on the front and rear ends of the vehicle frame 1 via the rotating shaft 22 , so that the vehicle frame 1 can move flexibly and stably, thereby improving the efficiency and stability of the collision test.

[0061] In this embodiment, the moving mechanism further includes two dual-axis synchronous motors 23 , which are respectively fixed to the front and rear ends of the frame 1 through motor brackets 24 , and the two ends of the two dual-axis synchronous motors 23 are respectively connected to adjacent rotating shafts 22 .

[0062] This embodiment Figure 3As shown, in actual application, two dual-axis synchronous motors 23 drive the four wheels 21 to drive the frame 1 to move, thereby driving each counterweight 3 to accelerate and collide with the rear end of the test vehicle to simulate a car rear collision test; wherein, the two dual-axis synchronous motors 23 can be driven simultaneously or separately.

[0063] The serial numbers of the embodiments of this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are only preferred embodiments of this application and do not limit the scope of the patent of this application. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of this application.

Claims

1. A force measurement device for rear protection of a car, characterized in that: include: A vehicle frame (1) and a moving mechanism, wherein the moving mechanism is mounted on the vehicle frame (1) and is used to drive the vehicle frame (1) to move; At least one counterweight (3), each counterweight (3) being stacked vertically at the front end of the vehicle frame (1); A fixing mechanism comprises two limiting rods (41), the two limiting rods (41) being mounted on a vehicle frame (1) and respectively located on both sides of a counterweight (3), the lengths of the two limiting rods (41) being arranged in a vertical direction, grooves (31) being respectively formed on both sides of each counterweight (3), and the two limiting rods (41) being respectively capable of being engaged with adjacent grooves (31).

2. The force measurement device for rear protection of an automobile according to claim 1, characterized in that: The fixing mechanism further comprises a lifting bracket (42), the lifting bracket (42) being mounted on the vehicle frame (1), the bottom ends of the two limiting rods (41) being respectively fixed on the lifting bracket (42), and the lifting bracket (42) being configured to be able to drive the two limiting rods (41) to rise and fall in a vertical direction, so that the two limiting rods (41) are respectively engaged with or separated from adjacent grooves (31).

3. The force measurement device for rear protection of an automobile according to claim 2, characterized in that: The fixing mechanism further comprises an extrusion plate (43) and a limiting plate (44), the two ends of the extrusion plate (43) are respectively slidably sleeved on the two limiting rods (41), the limiting plate (44) is fixed to the top ends of the two limiting rods (41), and the two limiting rods (41) are both sleeved with a spring (45), the two ends of the spring (45) are respectively fixed on the extrusion plate (43) and the limiting plate (44), and the extrusion plate (43) can abut against the counterweight (3) located at the top end.

4. The force measurement device for rear protection of an automobile according to claim 2, characterized in that: The fixing mechanism also includes a motor (46), a threaded rod (47) and two guide rods (48). The bottom end of the threaded rod (47) is rotatably mounted on the vehicle frame (1), and the top end thereof is connected to the motor (46). The two guide rods (48) are arranged in parallel, and the bottom ends thereof are both fixed on the vehicle frame (1). The motor (46) is fixed to the top ends of the two guide rods (48) through a mounting plate (49). The lifting bracket (42) is slidably mounted on the two guide rods (48) and is threadedly connected to the threaded rod (47).

5. The force measurement device for rear protection of an automobile according to claim 1, characterized in that: The vehicle also includes two L-shaped support frames (5), each of the two L-shaped support frames (5) including a support cross bar and a support vertical bar. The two support cross bars are arranged in parallel, and the two support vertical bars are fixed to the front end of the vehicle frame (1). Each of the counterweights (3) is stacked on the two support cross bars in a vertical direction and can abut against the support vertical bars.

6. The force measurement device for rear protection of an automobile according to claim 5, characterized in that: It also includes a support tray (6), which is fixed on the two support cross bars, and each of the counterweights (3) is stacked on the support tray (6) in a vertical direction.

7. The force measurement device for rear protection of an automobile according to claim 5, characterized in that: A reinforcing rod (7) is fixed on each of the two supporting vertical rods. The two reinforcing rods (7) are arranged obliquely, and one end thereof away from the supporting vertical rod is fixed on the vehicle frame (1).

8. The force measurement device for rear protection of an automobile according to claim 7, characterized in that: The number of reinforcing rods (7) connected to the supporting vertical rod is 2 or more, and the reinforcing rods (7) are evenly distributed along the vertical direction.

9. The force measurement device for rear protection of an automobile according to claim 1, characterized in that: The moving mechanism comprises four wheels, wherein the wheels (21) are rotatably mounted on the vehicle frame (1) via rotating shafts (22), two of the wheels (21) being symmetrically arranged on both sides of the front end of the vehicle frame (1), and the other two of the wheels (21) being symmetrically arranged on both sides of the rear end of the vehicle frame (1).

10. The force measurement device for rear protection of an automobile according to claim 9, characterized in that: The moving mechanism further comprises two dual-axis synchronous motors (23), the two dual-axis synchronous motors (23) being fixed to the front end and the rear end of the vehicle frame (1) respectively through motor brackets (24), and the two ends of the two dual-axis synchronous motors (23) being connected to adjacent rotating shafts (22) respectively.

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