Shock-resistant pickup truck rear bumper framework assembly and manufacturing method and adjusting method thereof

Abstract

The invention discloses an anti-impact pickup truck rear bumper framework assembly and a manufacturing method and an adjusting method thereof.The anti-impact pickup truck rear bumper framework assembly comprises a connecting table, a magnetic mounting frame is fixedly mounted at the bottom end of the connecting table, two mounting mechanisms are slidably connected to the middle of the magnetic mounting frame, a framework piece is arranged at the top end of the connecting table, and bumper bodies are slidably connected to the two ends of the framework piece; according to the pickup truck bumper assembly, the installation mechanism is arranged, the bumper framework assembly is installed on a pickup truck through the fixing plate, when the pickup truck bumps, the reset springs and the shock absorber bodies buffer generated bumping force, the phenomenon of resonance of the bumper framework assembly is avoided, and the shock resistance of the bumper framework assembly is improved. The normal use of the pickup truck rear bumper framework assembly is ensured; the shock absorption mechanism and the shock resistance mechanism are arranged, the shock resistance mechanism and the shock absorption mechanism sequentially buffer the received impact force, and the shock resistance of the bumper framework is improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts, and in particular to an impact-resistant pickup truck rear bumper frame assembly and a manufacturing method and an adjustment method thereof. Background Art

[0002] The pickup truck rear bumper frame assembly is located in the rear of the car. It is designed to prevent the impact of external damage on the vehicle safety system. They have the ability to reduce the damage to the driver and passengers in high-speed collisions. As an important safety component of the vehicle body, the car bumper is designed to absorb external impact and protect the front and rear of the vehicle. It is mainly composed of plastic bumpers, buffer materials and beams. The plastic bumper not only has strength and rigidity, but also has excellent decorative properties. In the event of a collision, it can effectively play a buffering role and protect the vehicle body from serious damage. At the same time, the combination of the bumper and the body is natural and smooth, which enhances the appearance of the whole vehicle.

[0003] However, the traditional pickup truck rear bumper frame assembly has the following disadvantages: The traditional pickup truck rear bumper frame assembly is installed on the pickup truck. When the pickup truck is driven on a bumpy road, the pickup truck rear bumper frame assembly is prone to resonate with the driving pickup truck, causing looseness at the installation location or the pickup truck rear bumper frame assembly to shake up and down, causing unnecessary collisions, affecting the normal use of the pickup truck rear bumper frame assembly. Summary of the invention

[0004] The purpose of the present invention is to provide an impact-resistant pickup truck rear bumper frame assembly and a manufacturing method and an adjustment method thereof, so as to solve the problem proposed in the above background technology that the traditional pickup truck rear bumper frame assembly is installed on a pickup truck, and when the pickup truck travels on a bumpy road section, the pickup truck rear bumper frame assembly is prone to resonate with the driving pickup truck, resulting in looseness at the installation site or the pickup truck rear bumper frame assembly shaking up and down, resulting in unnecessary collisions, affecting the normal use of the pickup truck rear bumper frame assembly.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an impact-resistant pickup truck rear bumper frame assembly, comprising a connecting platform, a magnetic mounting frame is fixedly installed on the bottom end of the connecting platform, two mounting mechanisms are slidably connected to the middle part of the magnetic mounting frame, a frame member is provided at the top of the connecting platform, and bumper bodies are slidably connected at both ends of the frame member, anti-impact mechanisms are fixedly installed on the top ends of the two bumper bodies, shock-absorbing mechanisms are installed on the bottom ends of the two bumper bodies, the two mounting mechanisms each comprise a magnetic displacement block and two limit plates, a fixing plate is provided at the bottom end of the magnetic displacement block, and the two sides of the top end of the fixing plate are respectively fixedly connected to the bottom ends of the two limit plates, and the two anti-impact mechanisms each comprise a length plate and a silicone block, and the length plate The top of the plate is fixedly connected to the bottom of the silicone block, and two height frames are provided at the bottom of the length plate. The two shock-absorbing mechanisms include a mounting platform and an angle seat. The top of the mounting platform is fixedly installed with an angle seat, and the angle seat is internally rotatably connected with an extension plate, and the top of the extension plate is slidably connected to a limiting shell. A shock-absorbing spring is installed at the height between the extension plate and the limiting shell, and the magnetic displacement block slides along the magnetic mounting frame to adjust the installation position of the mounting mechanism. When the pickup truck is bumpy, the bump force drives the fixed plate to bump from one side, and the fixed plate squeezes the reset spring from one side. The reset spring is elastic, and the reset spring undergoes elastic deformation to buffer the squeezing force, and the shock absorber body buffers the deformation force generated by the reset spring to avoid resonance of the bumper.

[0006] As a preferred technical solution of the present invention, threaded holes are provided at the four corners of the top of the fixing plate, and the user screws through the threaded holes to fix the fixing plate.

[0007] As a preferred technical solution of the present invention, a shock absorber body is fixedly installed in the middle of the top end of the fixed plate, and the top end of the shock absorber body is fixedly connected to the middle of the bottom end of the magnetic displacement block. Two return springs are fixedly installed on the fixed plate and are respectively located on both sides of the shock absorber body. The top ends of the two return springs are fixedly connected to the side opposite to the magnetic displacement block. The magnetic displacement block is slidably connected to the magnetic mounting frame, and the magnetic displacement block slides along the magnetic mounting frame to adjust the position of the mounting mechanism.

[0008] As a preferred technical solution of the present invention, the middle parts of the two height frames are slidably connected with sliding blocks, a translation plate is fixedly installed between the two sliding blocks, both sides of the top of the translation plate are rotatably connected with pushing rods, the tops of the two pushing rods are installed with synchronization blocks, the tops of the two pushing rods are fixedly installed with pulleys, the two pulleys are slidably connected to the length plate, and a spring shock absorber is fixedly installed between the two pushing rods. When external force collides with the anti-impact mechanism, the length plate moves toward the direction close to the bumper body, and the pulley slides along the length plate. During the sliding process of the pulley, the synchronization block is driven to push the push rod to deflect at an angle along the translation plate, and the translation plate drives the sliding block to slide along the height frame, and the spring shock absorber buffers the generated deformation force and impact force.

[0009] As a preferred technical solution of the present invention, the bottom ends of the two height frames are fixedly connected to the side directly opposite to the bumper body, and the anti-impact mechanism is installed on the bumper body through the height frames.

[0010] As a preferred technical solution of the present invention, the top ends of the two limiting shells are connected to the side opposite to the bumper body, the bottom ends of the two mounting platforms are fixedly connected to the side opposite to the connecting platform, the shock absorbing mechanism is installed on the bumper body through the limiting shells, and the shock absorbing mechanism is installed on the connecting platform through the mounting platform.

[0011] As a preferred technical solution of the present invention, an assembly platform is fixedly installed in the middle of the top of the connecting platform, and connecting seats are fixedly installed on both sides of the top of the assembly platform. Telescopic rods are rotatably connected inside the two connecting seats, and the fixed ends of the two telescopic rods are respectively connected to the opposite sides of the two bumper bodies. The connecting platform is installed on the bumper body through the telescopic rods and the assembly platform, the bumper body slides relative to the frame member, and the telescopic rods perform telescopic and deflection movements, thereby increasing the sliding stability of the bumper body.

[0012] The present invention provides a method for manufacturing an impact-resistant pickup truck rear bumper frame assembly, comprising the following steps: Step 1: Specification and material design: Make a preliminary design of the appearance according to the pickup truck model and select impact-resistant materials; Step 2: Mold setting: Prepare the corresponding top mold and bottom mold according to the model design; Step 3: Product preparation: inject the selected material between the top mold and the bottom mold for cutting, stamping and molding, and obtain the product after cooling and demolding; Step 4: Surface treatment: Use polishing and grinding equipment to grind and polish the surface of the formed product.

[0013] The invention discloses an adjustment method for the rear bumper frame assembly of an impact-resistant pickup truck. The method arranges a sensor network to monitor the working status of the bumper in real time, introduces an intelligent algorithm to analyze and process data, and realizes adaptive adjustment of the bumper to ensure its optimal performance under various road conditions. The specific steps are as follows: 1. Sensor Arrangement Sensors are arranged at key positions of the bumper frame to monitor the vehicle's driving status and the stress changes of the bumper in real time; Sensor type: accelerometer, strain gauge, displacement sensor Sensor placement: Sensors are placed at the four corners, center, and near the shock absorber of the bumper frame. 2. Data Collection and Preprocessing Sensor variables: For acceleration data Strain data For displacement data Data preprocessing: Filter and reduce noise on the collected data; 3. Feature Extraction Mean and variance of acceleration: ; ; in, is the mean acceleration, which is in the time period The average acceleration of all sampling points in the is the total number of sampling points; is the acceleration value sampled at time t; is the acceleration variance, which is in the time period The degree of variation of internal acceleration values; Mean and variance of strain: ; ; in, is the mean strain, which is in the time period The average strain of all sampling points in the is the total number of sampling points; is the strain value sampled at time t; is the variance of the strain, which is in the time period The degree of variation of internal strain values; Mean and variance of the displacement: ; ; in, is the mean displacement, which is in the time period The average displacement of all sampling points in is the total number of sampling points; is the displacement value sampled at time t; is the displacement variance, which is in the time period The degree of variability of internal displacement values; The extracted feature vector: ; in, is the feature vector; 4. Adaptive reinforcement learning model based on proximal policy optimization algorithm 1. State definition The feature vector at the current moment ; in, is the state space vector; 2. Action definition Action Space: ; in, is the action space vector; is the damping coefficient of the shock absorber; is the return spring stiffness 3. Reward Function Give rewards or penalties based on the working status of the bumper; ; in, is the reward function, which is used to evaluate the effect of the current action and give rewards or penalties according to the working status of the bumper; is the weight coefficient of acceleration; is the weight coefficient of strain; is the weight coefficient of displacement; 4. Policy Network Use the proximal policy optimization algorithm to learn the optimal policy and select actions To maximize future rewards; (1) Strategy function The probability distribution of the policy network output action: ; in, is the policy network parameter The policy function under are the parameters of the policy network; For at the moment The action of choice; For at the moment The state of the selection; For a given state Next, the policy network outputs actions The probability distribution of (2) Advantage function The advantage function measures the advantage of a particular state-action pair: ; in, Indicated in strategy Advantage function value under ; Indicated in strategy Next Value function; Value Function In a given strategy Next, from the state Take Action Expected cumulative rewards to be obtained after Indicated in strategy The value function under In a given strategy Next, from the state Initially, the average of the expected cumulative rewards after taking all possible actions; ; in, represents the expected value operation, which is used to calculate the average value of a random variable; Represents the time step The cumulative reward for all future time steps starts from time step Start with all time steps into the future; Represents the discount factor of power; discount factor Controls the importance of future rewards, ranging from 0 to 1; Indicates that at time step Instant rewards received; Indicates that at a given initial state and initial action , calculate the expected value of future cumulative rewards; ; Indicated in strategy Next, for action Expected value; Represents all possible actions; Indicates from the state At the beginning, the expected value of the cumulative reward for all future time steps; this expected value is obtained by calculating the expected value of each future reward According to the discount factor Obtained by weighted calculation; (3) Objective function The proximal policy optimization algorithm updates the policy network by optimizing the following objective function ; ; in, is the objective function used to optimize the parameters of the policy network by minimizing ; Represents the time step Perform an expectation operation, representing the average over multiple time steps; Indicates taking the minimum of two values ​​to ensure the stability of the objective function; Represents the strategy ratio, indicating the new strategy and the old strategy in the state Next select action The probability ratio of are the old parameters of the policy network; represents the old strategy under the old parameters; represents the advantage function under the old strategy; is the advantage function, which means that in the state Next, select Action Advantages over other actions; Represents the Q-value function under the old strategy; represents the value function under the old policy; To clip the function, we restrict the policy ratio to the interval to prevent the policy update from being too large; It is a hyperparameter for clipping the range and is usually set to a small value; (4) Update the strategy network ; in, The learning rate is a hyperparameter that controls the step size of each parameter update, which determines the speed of the update; Represents the policy network parameters About loss function The gradient of (5) Value function update The value function is updated by minimizing the following loss function: ; in, is the loss function of the value function, and the parameters of the value function network are updated by minimizing this loss function; are the parameters of the value function network, which are used to adjust the network to minimize the loss function; Indicated in the parameter The value function value under ; It is the core part of the loss function and represents the value function and actual rewards The square error between (6) Update the value function network ; in, is the network parameter representing the pairwise function About loss function gradient.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up the installation mechanism, the bumper frame assembly is installed on the pickup truck through the fixing plate. When the pickup truck is bumpy, the return spring and the shock absorber body buffer the bumping force generated to avoid the resonance of the bumper frame assembly and ensure the normal use of the pickup truck rear bumper frame assembly; 2. By setting up a shock absorbing mechanism and an anti-impact mechanism, the anti-impact mechanism and the shock absorbing mechanism buffer the impact force received in turn, thereby improving the anti-impact performance of the bumper frame itself.

[0015] 3. By arranging acceleration sensors, strain gauges and displacement sensors on the bumper frame, real-time monitoring of the vehicle's driving status and bumper stress changes can be achieved. The collected data is preprocessed and feature extracted, and then input into the adaptive reinforcement learning model for real-time analysis and feedback. By extracting features such as the mean and variance of acceleration, strain and displacement, and using an improved adaptive reinforcement learning algorithm, different types of impact forces and resonance conditions can be effectively identified and distinguished, thereby achieving more precise adjustment. Through the adaptive reinforcement learning algorithm, the damping coefficient of the shock absorber and the stiffness of the return spring are automatically adjusted according to the real-time monitored status and the identified impact type, ensuring that the best shock absorption and impact resistance effects can be provided under different road conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a side view of the present invention; Figure 2 is a side view of the anti-impact mechanism of the present invention; Figure 3 It is a connection diagram of the mounting mechanism and the mounting frame of the present invention; Figure 4 It is a connection diagram of the shock absorbing mechanism and the bumper body of the present invention; Figure 5 is a side view of the mounting mechanism of the present invention; Figure 6 It is a connection diagram of the framework member and the bumper body of the present invention; Figure 7 is a flow chart of the present invention; Figure 8 It is a flow chart of the intelligent algorithm of the present invention.

[0017] In the figure: 1. connecting table; 2. magnetic mounting frame; 3. mounting mechanism; 31. magnetic displacement block; 32. fixing plate; 33. reset spring; 34. limit plate; 35. shock absorber body; 36. threaded hole; 4. shock absorbing mechanism; 41. limit shell; 42. mounting table; 43. extension plate; 44. angle seat; 45. shock absorbing spring; 5. telescopic rod; 6. impact resistance mechanism; 61. height frame; 62. sliding block; 63. translation plate; 64. push rod; 65. length plate; 66. silicone block; 67. pulley; 68. spring shock absorber; 69. synchronization block; 7. connecting seat; 8. assembly table; 9. bumper body; 10. frame member. DETAILED DESCRIPTION

[0018] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-7The present invention provides an impact-resistant pickup truck rear bumper frame assembly, including a connecting platform 1, a magnetic mounting frame 2 is fixedly installed at the bottom end of the connecting platform 1, two mounting mechanisms 3 are slidably connected to the middle part of the magnetic mounting frame 2, a frame member 10 is provided at the top of the connecting platform 1, bumper bodies 9 are slidably connected at both ends of the frame member 10, anti-impact mechanisms 6 are fixedly installed at the tops of the two bumper bodies 9, shock absorbing mechanisms 4 are installed at the bottom ends of the two bumper bodies 9, the two mounting mechanisms 3 each include a magnetic displacement block 31 and two limit plates 34, a fixing plate 32 is provided at the bottom end of the magnetic displacement block 31, and both sides of the top end of the fixing plate 32 are fixedly connected to the bottom ends of the two limit plates 34 respectively, and the two anti-impact mechanisms 6 each include a length plate 65 and a silicone block 66, the top end of the length plate 65 is fixedly connected to the bottom end of the silicone block 66, and the length plate 65 is fixedly connected to the bottom end of the silicone block 66. Two height frames 61 are provided at the bottom end of the degree plate 65, and the two shock absorbing mechanisms 4 both include a mounting platform 42 and an angle seat 44. The top of the mounting platform 42 is fixedly installed with the angle seat 44, and the internal rotation of the angle seat 44 is connected with an extension plate 43, and the top of the extension plate 43 is slidably connected with the limit shell 41. A shock absorbing spring 45 is installed at the height between the extension plate 43 and the limit shell 41. The magnetic displacement block 31 slides along the magnetic mounting frame 2 to adjust the installation position of the mounting mechanism 3. When the pickup truck is bumpy, the bump force drives the fixed plate 32 to bump from one side, and the fixed plate 32 squeezes the reset spring 33 from one side. The reset spring 33 is elastic, and the reset spring 33 undergoes elastic deformation to buffer the squeezing force, and the shock absorber body 35 buffers the deformation force generated by the reset spring 33 to avoid resonance of the bumper.

[0020] The four corners at the top of the fixing plate 32 are all provided with threaded holes 36 , and the user screws through the threaded holes 36 to fix the fixing plate 32 .

[0021] A shock absorber body 35 is fixedly installed in the middle of the top of the fixed plate 32, and the top of the shock absorber body 35 is fixedly connected to the middle of the bottom end of the magnetic displacement block 31. Two return springs 33 are fixedly installed on the fixed plate 32 and are respectively located on both sides of the shock absorber body 35. The tops of the two return springs 33 are fixedly connected to the side opposite to the magnetic displacement block 31. The magnetic displacement block 31 is slidably connected to the magnetic mounting frame 2. The magnetic displacement block 31 slides along the magnetic mounting frame 2 to adjust the position of the mounting mechanism 3.

[0022] The middle parts of the two height frames 61 are slidably connected with sliding blocks 62, a translation plate 63 is fixedly installed between the two sliding blocks 62, and pushing rods 64 are rotatably connected on both sides of the top of the translation plate 63. Synchronous blocks 69 are installed on the tops of the two pushing rods 64, and pulleys 67 are fixedly installed on the tops of the two synchronous blocks 69. The two pulleys 67 are slidably connected to the length plate 65, and a spring shock absorber 68 is fixedly installed between the two pushing rods 64. When an external force collides with the anti-impact mechanism 6, the length plate 65 moves toward the direction close to the bumper body 9, and the pulley 67 slides along the length plate 65. During the sliding process of the pulley 67, the synchronous block 69 is driven to push the push rod 64 to deflect along the translation plate 63, and the translation plate 63 drives the sliding block 62 to slide along the height frame 61, and the spring shock absorber 68 buffers the generated deformation force and impact force.

[0023] The bottom ends of the two height frames 61 are fixedly connected to the side of the bumper body 9 that is directly opposite to the bumper body 9 , and the anti-impact mechanism 6 is installed on the bumper body 9 through the height frames 61 .

[0024] The top ends of the two limiting shells 41 are connected to the side facing the bumper body 9, and the bottom ends of the two mounting platforms 42 are fixedly connected to the side facing the connecting platform 1. The shock absorbing mechanism 4 is installed on the bumper body 9 through the limiting shells 41, and the shock absorbing mechanism 4 is installed on the connecting platform 1 through the mounting platforms 42.

[0025] An assembly platform 8 is fixedly installed in the middle of the top of the connecting platform 1, and connecting seats 7 are fixedly installed on both sides of the top of the assembly platform 8. Telescopic rods 5 are rotatably connected inside the two connecting seats 7. The fixed ends of the two telescopic rods 5 are respectively connected to the sides facing the two bumper bodies 9. The connecting platform 1 is installed on the bumper body 9 through the telescopic rods 5 and the assembly platform 8. The bumper body 9 slides relative to the frame member 10, and the telescopic rods 5 perform telescopic and deflection movements to increase the sliding stability of the bumper body 9.

[0026] The present invention provides a method for manufacturing an impact-resistant pickup truck rear bumper frame assembly, comprising the following steps: Step 1: Specification and material design: Make a preliminary design of the appearance according to the pickup truck model and select impact-resistant materials; Step 2: Mold setting: Prepare the corresponding top mold and bottom mold according to the model design; Step 3: Product preparation: inject the selected material between the top mold and the bottom mold for cutting, stamping and molding, and obtain the product after cooling and demolding; Step 4: Surface treatment: Use polishing and grinding equipment to grind and polish the surface of the formed product.

[0027] The manufacturing method of the impact-resistant pickup truck rear bumper frame assembly of the present invention comprises the following specific processes: 1. Data Collection and Preprocessing 1. Sensor data collection: Suppose in an experiment, we arranged acceleration sensors, strain gauges, and displacement sensors on the rear bumper frame of a pickup truck and collected the following data: Acceleration data ; Strain data ; Displacement data ; 2. Data preprocessing: The data is filtered and denoised, assuming that there is no significant change in the data after processing.

[0028] 2. Feature Extraction Extract key features from preprocessed sensor data: Acceleration mean Sum and variance : ; ; Strain mean and variance : ; ; Displacement Mean and variance : ; ; The extracted feature vector: ; 3. Improved Adaptive Reinforcement Learning Model 1. State definition The feature vector at the current moment ; 2. Action definition Action Space: ; 3. Reward Function Give rewards or penalties based on the working status of the bumper; ; Among them, assuming Then calculate the reward: ; 4. Policy Network Use the proximal policy optimization algorithm to learn the optimal policy and select actions To maximize future rewards; (1) Strategy function The probability distribution of the policy network output action: ; (2) Advantage function The advantage function measures the advantage of a particular state-action pair: ; ; ; (3) Objective function The proximal policy optimization algorithm updates the policy network by optimizing the following objective function ; ; (4) Update the strategy network ; (5) Value function update The value function is updated by minimizing the following loss function: ; (6) Update the value function network ; In the present invention, the appearance is preliminarily designed according to the pickup truck model, and impact-resistant materials are selected; the corresponding top mold and bottom mold are prepared according to the model design; the selected material is injected between the top mold and the bottom mold for cutting, stamping and molding, and the product is obtained after cooling and demolding; the surface of the molded product is polished and polished by polishing and grinding equipment, and the user screws the screw through the threaded hole 36 to fix the fixing plate 32, and the magnetic displacement block 31 slides along the magnetic mounting frame 2 to adjust the installation position of the mounting mechanism 3. When the pickup truck is bumpy, the bump force drives the fixing plate 32 to bump from one side, and the fixing plate 32 squeezes the reset spring from one side. The spring 33 and the return spring 33 are elastic. The return spring 33 undergoes elastic deformation to buffer the extrusion force, and the shock absorber body 35 buffers the deformation force generated by the return spring 33 to avoid resonance of the bumper. When an external force collides with the anti-impact mechanism 6, the length plate 65 moves toward the direction close to the bumper body 9, and the pulley 67 slides along the length plate 65. During the sliding process of the pulley 67, the synchronous block 69 is driven to push the push rod 64 to deflect an angle along the translation plate 63, and the translation plate 63 drives the sliding block 62 to slide along the height frame 61, and the spring shock absorber 68 buffers the generated deformation force and impact force.

[0029] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An impact-resistant pickup truck rear bumper frame assembly, comprising a connecting platform (1), characterized in that: A magnetic mounting frame (2) is fixedly mounted on the bottom end of the connecting platform (1), and two mounting mechanisms (3) are slidably connected to the middle of the magnetic mounting frame (2). A frame member (10) is provided at the top end of the connecting platform (1), and both ends of the frame member (10) are slidably connected to a bumper body (9). An anti-impact mechanism (6) is fixedly mounted on the top ends of the two bumper bodies (9), and a shock absorbing mechanism (4) is installed on the bottom ends of the two bumper bodies (9). The two mounting mechanisms (3) each include a magnetic displacement block (31) and two limit plates (34). A fixed plate (32) is provided at the bottom end of the magnetic displacement block (31), and the top ends of the fixed plate (32) are respectively connected to the two limit plates (34). The bottom end of the limit plate (34) is fixedly connected, the two anti-impact mechanisms (6) each comprise a length plate (65) and a silicone block (66), the top end of the length plate (65) is fixedly connected to the bottom end of the silicone block (66), the bottom end of the length plate (65) is provided with two height frames (61), the two shock absorbing mechanisms (4) each comprise a mounting platform (42) and an angle seat (44), the top end of the mounting platform (42) is fixedly mounted with an angle seat (44), the inside of the angle seat (44) is rotatably connected with an extension plate (43), the top end of the extension plate (43) is slidably connected with a limit shell (41), and a shock absorbing spring (45) is installed at a height between the extension plate (43) and the limit shell (41).

2. The impact-resistant pickup truck rear bumper frame assembly according to claim 1, characterized in that: The four corners at the top of the fixing plate (32) are each provided with threaded holes (36).

3. The impact-resistant pickup truck rear bumper frame assembly according to claim 1, characterized in that: A shock absorber body (35) is fixedly mounted in the middle of the top end of the fixing plate (32), the top end of the shock absorber body (35) is fixedly connected to the middle of the bottom end of the magnetic displacement block (31), two return springs (33) are fixedly mounted on the fixing plate (32) and are respectively located on both sides of the shock absorber body (35), the top ends of the two return springs (33) are fixedly connected to the side directly opposite to the magnetic displacement block (31), and the magnetic displacement block (31) is slidably connected to the magnetic mounting frame (2).

4. The impact-resistant pickup truck rear bumper frame assembly according to claim 1, characterized in that: The middle parts of the two height frames (61) are slidably connected with a sliding block (62), a translation plate (63) is fixedly installed between the two sliding blocks (62), both sides of the top of the translation plate (63) are rotatably connected with a push rod (64), the tops of the two push rods (64) are installed with a synchronization block (69), the tops of the two synchronization blocks (69) are fixedly installed with a pulley (67), the two pulleys (67) are slidably connected to the length plate (65), and a spring shock absorber (68) is fixedly installed between the two push rods (64).

5. The impact-resistant pickup truck rear bumper frame assembly according to claim 1, characterized in that: The bottom ends of the two height frames (61) are fixedly connected to a side directly facing the bumper body (9).

6. The impact-resistant pickup truck rear bumper frame assembly according to claim 1, characterized in that: The top ends of the two limiting shells (41) are connected to a side directly facing the bumper body (9), and the bottom ends of the two mounting platforms (42) are fixedly connected to a side directly facing the connecting platform (1).

7. The impact-resistant pickup truck rear bumper frame assembly according to claim 1, characterized in that: An assembly platform (8) is fixedly mounted in the middle of the top of the connection platform (1), and connection seats (7) are fixedly mounted on both sides of the top of the assembly platform (8). Telescopic rods (5) are rotatably connected inside the two connection seats (7), and the fixed ends of the two telescopic rods (5) are respectively connected to the opposite sides of the two bumper bodies (9).

8. A method for manufacturing an impact-resistant pickup truck rear bumper frame assembly according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Specification and material design: Make a preliminary design of the appearance according to the pickup truck model and select impact-resistant materials; Step 2: Mold setting: Prepare the corresponding top mold and bottom mold according to the model design; Step 3: Product preparation: inject the selected material between the top mold and the bottom mold for cutting, stamping and molding, and obtain the product after cooling and demolding; Step 4: Surface treatment: Use polishing and grinding equipment to grind and polish the surface of the formed product.

9. The method for adjusting the impact-resistant pickup truck rear bumper frame assembly according to claim 1, characterized in that: By deploying a sensor network to monitor the working status of the bumper in real time, and introducing intelligent algorithms for data analysis and processing, the bumper can be adaptively adjusted to ensure its optimal performance under various road conditions. The specific steps are as follows: S1. Sensor Arrangement Sensors are arranged at key positions of the bumper frame to monitor the vehicle's driving status and the stress changes of the bumper in real time; Sensor type: accelerometer, strain gauge, displacement sensor; Sensor placement: Sensors are placed at the four corners, center and near the shock absorber of the bumper frame; 2. Data Collection and Preprocessing Sensor variables: For acceleration data Strain data For displacement data Data preprocessing: Filter and reduce noise on the collected data; S3. Feature extraction Mean and variance of acceleration: ； ； in, is the mean acceleration, which is in the time period The average acceleration of all sampling points in the is the total number of sampling points; is the acceleration value sampled at time t; is the acceleration variance, which is in the time period The degree of variation of internal acceleration values; Mean and variance of strain: ； ； in, is the mean strain, which is in the time period The average strain of all sampling points in the is the total number of sampling points; is the strain value sampled at time t; is the variance of the strain, which is in the time period The degree of variation of internal strain values; Mean and variance of the displacement: ； ； in, is the mean displacement, which is in the time period The average displacement of all sampling points in is the total number of sampling points; is the displacement value sampled at time t; is the displacement variance, which is in the time period The degree of variability of internal displacement values; The extracted feature vector: ； in, is the feature vector; S4. Adaptive reinforcement learning model based on proximal policy optimization algorithm 1). State definition The feature vector at the current moment ； in, is the state space vector; 2). Action definition Action Space: ； in, is the action space vector; is the damping coefficient of the shock absorber; is the return spring stiffness 3) Reward function Give rewards or penalties based on the working status of the bumper; ； in, is the reward function, which is used to evaluate the effect of the current action and give rewards or penalties according to the working status of the bumper; is the weight coefficient of acceleration; is the weight coefficient of strain; is the weight coefficient of displacement; 4). Policy Network Use the proximal policy optimization algorithm to learn the optimal policy and select actions To maximize future rewards; (1) Strategy function The probability distribution of the policy network output action: ； in, is the policy network parameter The policy function under are the parameters of the policy network; For at the moment The action of choice; For at the moment The state of the selection; For a given state Next, the policy network outputs actions The probability distribution of (2) Advantage function The advantage function measures the advantage of a particular state-action pair: ； in, Indicated in strategy Advantage function value under ; Indicated in strategy Next Value function; Value Function In a given strategy Next, from the state Take Action Expected cumulative rewards to be obtained after Indicated in strategy The value function under In a given strategy Next, from the state Initially, the average of the expected cumulative rewards after taking all possible actions; ； in, represents the expected value operation, which is used to calculate the average value of a random variable; Represents the time step The cumulative reward for all future time steps starts from time step Start with all time steps into the future; Represents the discount factor of power; discount factor Controls the importance of future rewards, ranging from 0 to 1; Indicates that at time step Instant rewards received; Indicates that at a given initial state and initial action , calculate the expected value of future cumulative rewards; ； Indicated in strategy Next, for action Expected value; Represents all possible actions; Indicates from the state At the beginning, the expected value of the cumulative reward for all future time steps; this expected value is obtained by calculating the expected value of each future reward According to the discount factor Obtained by weighted calculation; (3) Objective function The proximal policy optimization algorithm updates the policy network by optimizing the following objective function ； ； in, is the objective function used to optimize the parameters of the policy network by minimizing ; Represents the time step Perform an expectation operation, representing the average over multiple time steps; Indicates taking the minimum of two values ​​to ensure the stability of the objective function; Represents the strategy ratio, indicating the new strategy and the old strategy in the state Next select action The probability ratio of are the old parameters of the policy network; represents the old strategy under the old parameters; represents the advantage function under the old strategy; is the advantage function, which means that in the state Next, select Action Advantages over other actions; Represents the Q-value function under the old strategy; represents the value function under the old policy; To clip the function, we restrict the policy ratio to the interval to prevent the policy update from being too large; It is a hyperparameter for clipping the range and is usually set to a small value; (4) Update the strategy network ； in, The learning rate is a hyperparameter that controls the step size of each parameter update, which determines the speed of the update; Represents the policy network parameters About loss function The gradient of (5) Value function update The value function is updated by minimizing the following loss function: ； in, is the loss function of the value function, and the parameters of the value function network are updated by minimizing this loss function; are the parameters of the value function network, which are used to adjust the network to minimize the loss function; Indicated in the parameter The value function value under ; It is the core part of the loss function and represents the value function and actual rewards The square error between (6) Update the value function network ； in, is the network parameter representing the pairwise function About loss function gradient.

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