Automobile underbody brake device and automobile

Abstract

The utility model relates to the field of automobile braking technology, concretely is a kind of automobile underbody brake device and car, including automobile chassis, mounting block, brake board, drive structure and PLC controller, wherein, automobile chassis middle part is equipped with battery;Mounting block includes two, two mounting blocks are fixedly arranged in the bottom of automobile chassis, and are located the two sides of battery symmetry;Brake board includes two, it is respectively arranged in the bottom of two mounting blocks;Drive structure includes two groups, it is respectively arranged in the side of mounting block corresponding brake board, and is driven to connect with brake board;PLC controller is arranged on mounting block, and is electrically connected with drive structure and automobile touch sensor device.The brake board is symmetrically arranged on the two sides of battery in the direction of vehicle travel, when vehicle is out of control forward or backward movement under collision, or when sensing collision danger, brake board in the direction of travel effectively brakes, at the same time, reduce the extrusion of vehicle bottom to battery, improve the reliability of braking.

Description

Technical Field

[0001] This utility model relates to the field of automotive braking technology, specifically to an automotive undercarriage braking device and an automotive. Background Technology

[0002] The braking system is the complete braking system assembly installed on a vehicle. Its function is to decelerate or stop the vehicle while it is in motion, or to keep the vehicle stationary.

[0003] During vehicle braking, braking energy is mainly consumed by the brakes, mechanical wear, and friction between the wheels and the ground. Currently used vehicle brakes include friction brakes (disc and drum), retarders (hydraulic, electric, and pneumatic), engine braking, and anti-lock braking systems (ABS), etc. Domestic and foreign research institutions and automobile manufacturers mainly focus on brake-related work. However, in increasing the friction between the wheels and the ground, most people focus on increasing the coefficient of friction. However, since the contact area between the tire and the ground is limited, and the friction between the wheels and the ground is rolling friction with a low coefficient of friction, increasing the friction between the wheels and the ground is limited.

[0004] The existing utility model patent CN204095781U proposes an automotive braking assistance device and an automotive. In this utility model, the electromagnetic limit pin is released when the body controller is energized during emergency braking. The compressed support spring immediately pushes the support rod to make the brake plate press down on the ground to increase resistance. After the reset motor pulls up the brake plate, the spring is recompressed and ready to be used again.

[0005] As described in the above technical solution, the brake plate is supported downward by a compression spring to achieve the purpose of assisted braking. However, the above device has the problem of low reliability of the assisted braking device. Since the compression spring is located near the rotating connection of the brake plate, the required support force will be greater. At the same time, using a spring as a support device makes the friction between the brake plate and the ground negligible, resulting in poor assisted braking effect. Secondly, in new energy vehicles, the battery is generally located at the bottom of the car. Using this braking structure will greatly increase the area occupied under the car. In addition, in the event of a collision, it may increase the pressure on the battery, resulting in the risk of loss of control and fire. Utility Model Content

[0006] In view of the technical problems in the prior art, the present invention provides a vehicle undercarriage braking device and a vehicle, aiming to solve the problem of low reliability of auxiliary braking devices in new energy vehicles.

[0007] A vehicle underbody braking device includes a vehicle chassis, a mounting block, a brake plate, a drive structure, and a PLC controller, wherein...

[0008] The vehicle chassis has a battery located in the middle.

[0009] The mounting block includes two blocks, which are fixedly installed on the bottom of the vehicle chassis and located on both sides of the battery symmetrically, corresponding to the forward and reverse directions of the vehicle, respectively.

[0010] The brake plate comprises two plates, which are respectively disposed at the bottom of the two mounting blocks;

[0011] The drive structure includes two sets, which are respectively located on one side of the mounting block corresponding to the brake plate and are driven to connect with the brake plate to drive the brake plate to move up and down.

[0012] The PLC controller is mounted on the mounting block and is electrically connected to the drive structure and the vehicle touch sensor. It is used to receive collision signals from the vehicle touch sensor and activate the drive structure to drive the brake plate to perform braking.

[0013] Optionally, the drive structure includes a hydraulic cylinder, a piston rod, and a connecting rod assembly, wherein,

[0014] The hydraulic cylinder is fixedly mounted on the bottom of the mounting block;

[0015] The piston rod is located at the bottom of the cylinder and is fixedly connected to the top of the brake plate;

[0016] The connecting rod assembly is located on the side of the hydraulic cylinder facing the battery and is movably connected to the mounting block on the side opposite to the brake plate, for auxiliary support of the brake plate when the brake plate is braking.

[0017] Optionally, the linkage assembly includes a first linkage and a second linkage, wherein,

[0018] One end of the first connecting rod is rotatably connected to the bottom of the mounting block;

[0019] One end of the second link is rotatably connected to the top of the brake plate, and the other end is rotatably connected to the other end of the first link.

[0020] Optionally, the second link is located on the side of the first link facing the cylinder, and is used to unfold the first link and the second link to form a support state inclined to the direction of travel when the brake plate is lowered for braking.

[0021] Optionally, the linkage assembly further includes a torsion spring and a limiting member, wherein,

[0022] The torsion spring is located at one end where the first link and the second link are rotatably connected, and is used to drive the first link and the second link to unfold.

[0023] The limiting component is located at one end where the first link and the second link are rotatably connected, and is used to stop and limit the movement of the first link and the second link after they are unfolded.

[0024] Optionally, the limiting member includes a first limiting block and a second limiting block, wherein,

[0025] The first limiting block is fixed to one end of the first link corresponding to the second link;

[0026] The second limiting block is fixed on the second link and is correspondingly set with the first limiting block, so as to form a complementary stop cooperation after the first link and the second link are unfolded.

[0027] Optionally, the mounting block has a first receiving groove on the side facing the first connecting rod, corresponding to the first connecting rod, and one end of the first connecting rod is rotatably connected in the first receiving groove; the brake plate has a second receiving groove on the side facing the second connecting rod, corresponding to the second connecting rod, and one end of the second connecting rod is rotatably connected in the second receiving groove, for storing the first connecting rod and the second connecting rod when the brake plate is not braking.

[0028] Optionally, the brake plate has an arc-shaped surface on the bottom side away from the battery.

[0029] Optionally, it also includes a wear-resistant plate, which is fixedly disposed at the bottom of the brake plate and extends to the arc-shaped surface on the side facing the arc-shaped surface.

[0030] This utility model also provides a car, including the above-mentioned car undercarriage braking device.

[0031] Compared with the prior art, the automobile undercarriage braking device and automobile provided by this utility model have the following beneficial effects:

[0032] (1) By symmetrically placing the brake plates on both sides of the battery in the direction of the vehicle's travel (forward or backward), the space under the battery is avoided from being directly occupied. When the vehicle loses control and moves forward or backward in the event of a collision, or when a collision hazard is sensed, the brake plate in the corresponding direction of travel can effectively brake while reducing the pressure on the battery from the bottom of the vehicle. At the same time, the PLC controller is linked with the touch sensor to realize the lifting and lowering of the brake plate triggered by the collision signal, thereby improving the braking response speed and reliability.

[0033] (2) The piston rod driven by the hydraulic cylinder directly presses down the brake plate. With the self-locking connecting rod assembly after unfolding, when braking, the first and second connecting rods of the connecting rod assembly are set in the direction of travel and tilted. With the drive of the torsion spring, they can provide auxiliary support for the brake plate, improve the braking effect, and reduce the hydraulic cylinder pressure. At the same time, the connecting rod can be completely stored in the mounting block and the receiving groove of the brake plate, without occupying the space under the vehicle, thus improving the compactness and safety of the whole vehicle.

[0034] (3) The bottom arc surface of the brake plate is combined with the full-coverage wear-resistant pad to optimize the smoothness of the braking process, guide the brake plate to slide over obstacles, and reduce the risk of jamming; at the same time, the wear-resistant pad ensures the grip and reliability during emergency braking. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of a vehicle undercarriage braking device when not braking, according to this utility model.

[0036] Figure 2 This is a schematic diagram of the braking structure of an automobile undercarriage braking device according to the present invention;

[0037] Figure 3 for Figure 1 Sectional view along the AA direction;

[0038] Figure 4 This is a schematic diagram of the driving structure of a vehicle undercarriage braking device during braking, according to the present invention.

[0039] In the diagram: 1. Car chassis; 11. Battery; 2. Mounting block; 201. First receiving groove; 202. Second receiving groove; 3. Brake plate; 301. Arc-shaped surface; 4. Drive structure; 41. Hydraulic cylinder; 42. Piston rod; 43. Connecting rod assembly; 431. First connecting rod; 432. Second connecting rod; 433. Torsion spring; 434. First limiting block; 435. Second limiting block; 5. PLC controller; 6. Wear-resistant plate. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] Please see Figure 1-4 The present application discloses a vehicle undercarriage braking device, which includes a vehicle chassis 1, a mounting block 2, a brake plate 3, a drive structure 4, and a PLC controller 5.

[0042] like Figure 1-2As shown, a battery 11 is located in the middle of the car chassis 1; there are two mounting blocks 2, which are fixed to the bottom of the car chassis 1 and located on both sides of the battery 11 symmetrically, corresponding to the forward and reverse directions of the car respectively; there are two brake plates 3, which are located at the bottom of the two mounting blocks 2 respectively; there are two sets of drive structures 4, which are located on the side of the mounting block 2 corresponding to the brake plate 3 and are driven and connected to the brake plate 3, and are used to drive the brake plate 3 to move up and down; a PLC controller 5 is located on the mounting block 2 and is electrically connected to the drive structure 4 and the car touch sensor, and is used to receive collision signals and start the drive structure 4 to drive the brake plate 3 to perform braking work.

[0043] Specifically, when a vehicle collides and slides forward or backward, or senses a collision hazard, a signal is sent to the PLC controller 5 through the vehicle's touch sensor. The PLC controller 5 controls the corresponding drive structure 4 to drive the brake plate 3 in the corresponding direction of travel to be pushed out quickly, and the ground reaction force forms additional resistance. The brake plate 3 is located on both sides of the battery 11 rather than directly below it, so as to avoid occupying the bottom space of the battery 11. At the same time, the brake plates 3 located on both sides of the battery 11 reduce the pressure of the chassis on the battery 11 when braking, reduce the risk of fire, and improve the braking response speed and reliability.

[0044] In some embodiments, such as Figure 3-4 As shown, the drive structure 4 includes a hydraulic cylinder 41, a piston rod 42, and a connecting rod assembly 43. The hydraulic cylinder 41 is fixed to the bottom of the mounting block 2, and the lower end of the piston rod 42 is fixed to the top of the brake plate 3. The connecting rod assembly 43 consists of a first connecting rod 431 and a second connecting rod 432. The upper end of the first connecting rod 431 is rotatably connected to the mounting block 2, and the lower end of the second connecting rod 432 is rotatably connected to the brake plate 3. The second connecting rod 432 is located on the side of the first connecting rod 431 facing the hydraulic cylinder 41, and the upper end of the second connecting rod 432 is rotatably connected to the lower end of the first connecting rod 431. When braking, the first connecting rod 431 and the second connecting rod 432 unfold to form a support state inclined to the direction of travel.

[0045] Specifically, the hydraulic cylinder 41 directly presses down on the brake plate 3 via the piston rod 42, generating sufficient positive pressure. The connecting rod assembly 43 unfolds when the brake plate 3 descends. Since the first connecting rod 431 and the second connecting rod 432 are misaligned, and the second connecting rod 432 is located on the side of the first connecting rod 431 facing the hydraulic cylinder 41, when the brake plate 3 moves down to brake, the first connecting rod 431 and the second connecting rod 432 unfold to form a support inclined to the direction of travel, providing additional support force for the brake plate 3, sharing the load of the hydraulic cylinder 41 and preventing the brake plate 3 from rebounding, significantly improving the braking effect and extending the life of the hydraulic cylinder 41.

[0046] In some embodiments, such as Figure 3-4As shown, the linkage assembly 43 is provided with a torsion spring 433 and a limiting member at the rotational connection between the first link 431 and the second link 432; the torsion spring 433 drives the two links to unfold, and the limiting member is composed of a first limiting block 434 and a second limiting block 435 respectively fixed on the first link 431 and the second link 432. After unfolding, the two limiting blocks form a complementary stop engagement.

[0047] Specifically, when the brake plate 3 moves downward, the torsion spring 433 assists the first link 431 and the second link 432 in unfolding. Simultaneously, after the first link 431 and the second link 432 unfold, the torsion spring 433 prevents vibration or impact from causing the link to fold, ensuring continuous and reliable braking. At the same time, the first limiting block 434 and the second limiting block 435, which cooperate with the first link 431 and the second link 432, limit their movement after unfolding, preventing excessive rotation of the first link 431 and the second link 432, which would affect the braking effect and subsequent recovery. Figure 4 As shown.

[0048] In some embodiments, such as Figure 3-4 As shown, the mounting block 2 has a first receiving groove 201 on the side facing the first connecting rod 431, corresponding to the first connecting rod 431, and one end of the first connecting rod 431 is rotatably connected in the first receiving groove 201; the brake plate 3 has a second receiving groove 202 on the side facing the second connecting rod 432, corresponding to the second connecting rod 432, and one end of the second connecting rod 432 is rotatably connected in the second receiving groove 202, which is used to store the first connecting rod 431 and the second connecting rod 432 when the brake plate 3 is not braking.

[0049] Specifically, the first receiving groove 201 and the second receiving groove 202 are configured such that when the brake plate 3 is not braking, the first connecting rod 431 and the second connecting rod 432 are housed in their respective receiving grooves, thereby greatly reducing the downward protrusion distance of the brake plate 3, reducing wind resistance and the risk of scraping, avoiding affecting normal driving safety, and improving the compactness and passability of the entire vehicle. Figure 3 As shown.

[0050] In some embodiments, such as Figure 1-4 As shown, the brake plate 3 has an arc-shaped surface 301 on the bottom side away from the battery 11; the wear-resistant sheet 6 is fixed to the bottom of the brake plate 3 and extends to the arc-shaped surface 301.

[0051] Specifically, the arc-shaped surface 301 prevents the brake plate 3 from making hard contact with obstacles during braking, reducing the risk of jamming. The wear-resistant sheet 6 covering the arc-shaped surface 301 provides a high coefficient of friction and wear resistance life, ensuring that effective grip is quickly established during emergency braking and improving system reliability.

[0052] This utility model also provides a car, including the above-mentioned car undercarriage braking device, which is directly integrated into the car chassis 1. When a collision signal triggers the brake plate 3 in the corresponding direction to press down instantly to increase resistance, it can both shorten the braking distance and protect the battery 11.

[0053] The specific workflow is as follows:

[0054] When a vehicle collides and begins to slip, or when a collision risk is detected, touch sensors installed around the vehicle body immediately send electrical signals to the PLC controller 5. Based on the slip direction, the PLC controller 5 drives the hydraulic cylinder 41 to quickly bring the brake plate 3 to the ground. Simultaneously, the first connecting rod 431 and the second connecting rod 432, originally folded and stored in the mounting block 2 and the brake plate 3's receiving slot, unfold synchronously under the action of the torsion spring 433, forming a rigid support inclined towards the direction of travel. The arc-shaped surface 301 at the bottom of the brake plate 3, in conjunction with the fully covered wear-resistant pad 6, first makes progressive contact with the ground. As the hydraulic cylinder 41 continuously applies pressure, the coefficient of friction between the wear-resistant pad 6 and the ground rapidly reaches its peak, generating significant longitudinal resistance. This resistance is transmitted in the opposite direction to the chassis via the connecting rod assembly 43, allowing the vehicle's kinetic energy to be rapidly absorbed, ultimately enabling the vehicle to decelerate smoothly over a short distance until it comes to a complete stop. Throughout the process, the battery 11 remains between the two sets of brake plates 3, avoiding direct impact and compression of the battery 11. This not only improves braking response speed and reliability but also significantly reduces the risk of the battery 11 being damaged and catching fire due to a collision in new energy vehicles.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0056] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0057] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vehicle undercarriage braking device, characterized in that: It includes a car chassis (1), mounting block (2), brake plate (3), drive structure (4), and PLC controller (5), among which, The vehicle chassis (1) has a battery (11) in the middle. The mounting block (2) includes two, which are fixedly installed on the bottom of the car chassis (1) and located on both sides of the battery (11) symmetrically, corresponding to the forward and reverse directions of the car respectively; The brake plate (3) comprises two, which are respectively disposed at the bottom of the two mounting blocks (2); The drive structure (4) includes two sets, which are respectively located on one side of the mounting block (2) corresponding to the brake plate (3) and are driven to connect with the brake plate (3) for driving the brake plate (3) to move up and down; The PLC controller (5) is mounted on the mounting block (2) and electrically connected to the drive structure (4) and the car touch sensor. It is used to receive the collision signal from the car touch sensor and start the drive structure (4) to drive the brake plate (3) to perform braking.

2. The vehicle undercarriage braking device according to claim 1, characterized in that, The drive structure (4) includes a hydraulic cylinder (41), a piston rod (42), and a connecting rod assembly (43), wherein, The hydraulic cylinder (41) is fixedly mounted on the bottom of the mounting block (2); The piston rod (42) is located at the bottom of the oil cylinder (41) and is fixedly connected to the top of the brake plate (3); The connecting rod assembly (43) is located on the side of the cylinder (41) facing the battery (11) and is movably connected to the mounting block (2) on the side opposite to the brake plate (3), and is used to provide auxiliary support for the brake plate (3) when the brake plate (3) is braked.

3. The vehicle undercarriage braking device according to claim 2, characterized in that, The linkage assembly (43) includes a first link (431) and a second link (432), wherein, One end of the first connecting rod (431) is rotatably connected to the bottom of the mounting block (2); One end of the second link (432) is rotatably connected to the top of the brake plate (3), and the other end is rotatably connected to the other end of the first link (431).

4. A vehicle undercarriage braking device according to claim 3, characterized in that, The second link (432) is located on the side of the first link (431) facing the cylinder (41), and is used to unfold the first link (431) and the second link (432) to form a support state inclined to the direction of travel when the brake plate (3) is lowered for braking.

5. A vehicle undercarriage braking device according to claim 3, characterized in that, The linkage assembly (43) further includes a torsion spring (433) and a limiting member, wherein, The torsion spring (433) is located at one end of the first link (431) and the second link (432) that are rotatably connected, and is used to drive the first link (431) and the second link (432) to unfold; The limiting member is located at one end of the first link (431) and the second link (432) that are rotatably connected, and is used to stop and limit the first link (431) and the second link (432) after they are unfolded.

6. A vehicle undercarriage braking device according to claim 5, characterized in that, The limiting component includes a first limiting block (434) and a second limiting block (435), wherein, The first limiting block (434) is fixed to one end of the first link (431) corresponding to the second link (432); The second limiting block (435) is fixed on the second link (432) and is correspondingly set with the first limiting block (434) to form a complementary stop after the first link (431) and the second link (432) are unfolded.

7. A vehicle undercarriage braking device according to claim 3, characterized in that, The mounting block (2) has a first receiving groove (201) on the side facing the first connecting rod (431) corresponding to the first connecting rod (431), and one end of the first connecting rod (431) is rotatably connected in the first receiving groove (201); the brake plate (3) has a second receiving groove (202) on the side facing the second connecting rod (432) corresponding to the second connecting rod (432), and one end of the second connecting rod (432) is rotatably connected in the second receiving groove (202) for storing the first connecting rod (431) and the second connecting rod (432) when the brake plate (3) is not braking.

8. A vehicle undercarriage braking device according to claim 1, characterized in that, The brake plate (3) has an arc-shaped surface (301) at the bottom of the side away from the battery (11).

9. A vehicle undercarriage braking device according to claim 8, characterized in that, It also includes a wear-resistant plate (6), which is fixedly disposed at the bottom of the brake plate (3) and extends to the arc surface (301) on the side facing the arc surface (301).

10. A car, characterized in that, The vehicle undercarriage braking device includes any one of claims 1-9.

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