Brake assist device

Abstract

The application belongs to the technical field of braking, and discloses a brake auxiliary device, which comprises an adhesion detection assembly, a first electric cylinder, a first pressure cylinder and a second pressure cylinder. The adhesion detection assembly comprises a contact disc, a first elastic member and a first control circuit. The contact disc can move along the length direction of the vehicle body and contact with the ground. The first control circuit comprises a force-sensitive resistor and a first control member in parallel. The first elastic member is connected between the contact disc and the force-sensitive resistor. The first control member can control the extension of the movable end of the first electric cylinder. The first pressure cylinder comprises a first cylinder body and a first piston. The first piston and the first cylinder body form a first cavity. The second pressure cylinder comprises a second cylinder body and a second piston. The second piston and the second cylinder body form a second cavity. The first cavity and the second cavity are communicated. A shielding member is fixed on the second piston. The second cavity is communicated with a brake cylinder. The brake auxiliary device can assist and adjust the braking process of the vehicle according to the adhesion of the road surface.

Description

Technical Field

[0001] The present invention relates to the field of braking technology, and in particular to a braking assist device. Background Art

[0002] The road adhesion coefficient refers to the vehicle's ability to adhere to different roads. The value of the adhesion coefficient mainly depends on factors such as the road material, road conditions, tire structure, tread pattern, material, and vehicle speed. The larger the adhesion coefficient, the greater the available adhesion of the vehicle tires, and the greater the braking force the vehicle can achieve. In rainy and snowy weather, the road adhesion coefficient will drop significantly, and the braking force that the vehicle can achieve will also decrease as the adhesion coefficient decreases, making rear-end collisions and other safety accidents more likely to occur. The adhesion of the vehicle to the road will directly affect its braking effect. How to adaptively assist in adjusting the braking process based on the vehicle's current road adhesion has also become the current focus of researchers in this field. Summary of the Invention

[0003] The object of the present invention is to provide a brake assist device that can adaptively assist in adjusting the braking process according to the road adhesion conditions during vehicle driving.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] A brake assist device comprising:

[0006] An adhesion detection assembly includes a contact plate, a first elastic member, and a first control circuit. The contact plate is provided on the vehicle body and is movable relative to the vehicle body along the length of the vehicle body and is configured to contact the ground. The first control circuit includes a force-sensitive resistor and a first control member connected in parallel. The first elastic member is connected between the contact plate and the force-sensitive resistor.

[0007] a first electric cylinder in communication with the first control element, wherein the first control element is energized to control the movable end of the first electric cylinder to extend relative to the fixed end, and the extension distance is proportional to the energized voltage of the first control element;

[0008] a first pressure cylinder comprising a first cylinder body and a first piston disposed in the first cylinder body, the first cylinder body being fixed to the vehicle body, a first side of the first piston being connected to a movable end of the first electric cylinder, and a second side of the first piston forming a first cavity with the first cylinder body;

[0009] The second pressure cylinder comprises a second cylinder body and a second piston arranged in the second cylinder body, the second cylinder body is fixed on the vehicle body, a first side of the second piston is connected with a brake pedal, a second side of the second piston forms a second cavity with the second cylinder body, the first cavity and the second cavity are communicated through a liquid guide pipe, a shielding member capable of shielding the liquid guide pipe is fixed on the second side of the second piston, the first cavity and the second cavity are filled with pressure liquid, and the second cavity is communicated with a brake cylinder.

[0010] Preferably, the adhesion detection assembly comprises a sliding rail and a sliding part, the sliding rail is fixed on the vehicle body and extends along the length direction of the vehicle body, the sliding part is slidably arranged on the sliding rail, the contact disc is arranged on the sliding part, and one end of the first elastic member is connected with the sliding part and the other end is connected with the force-sensitive resistor.

[0011] Preferably, a second elastic member is connected between the contact disc and the sliding part, and the contact disc can move in the vertical direction through the second elastic member.

[0012] Preferably, the adhesion detection assembly further comprises a pressure correction assembly, the pressure correction assembly comprises a second electric cylinder and a second control circuit, a fixed end of the second electric cylinder is fixed on the sliding part, two ends of the second elastic member are respectively connected with the contact disc and a movable end of the second electric cylinder, the second control circuit comprises a conductive pointer, a long strip resistor and a second control member, the conductive pointer is slidably in contact with the long strip resistor, the long strip resistor is fixedly connected with the contact disc, the conductive pointer is fixedly connected with the movable end of the second electric cylinder, the conductive pointer, the long strip resistor, a side away from the contact disc of the long strip resistor and the second control member are connected in series, the second electric cylinder is communicatively connected with the second control member, the second control member is powered to control the movable end of the second electric cylinder to extend out of the fixed end, and the extension distance is proportional to the power voltage of the second control member.

[0013] Preferably, the adhesion detection assembly comprises a first box body, the first box body is fixed on the vehicle body, the first control member is arranged in the first box body, a first end of the force-sensitive resistor is connected in parallel with the first control member and located in the first box body, and a second end of the force-sensitive resistor extends out of the first box body and is connected with the first elastic member.

[0014] Preferably, the pressure correction assembly includes a second box body, which is fixed on the vehicle body, and the second control circuit is located in the second box body. A first connecting rod assembly is fixedly provided on the contact plate, and the first connecting rod assembly extends into the second box body and is fixedly connected to the long resistor. A second connecting rod assembly is fixedly provided on the movable end of the second electric cylinder, and the second connecting rod assembly extends into the second box body and is fixedly connected to the conductive pointer.

[0015] Preferably, a third elastic member is provided in the second cylinder, one end of the third elastic member is connected to the second cylinder, and the other end of the third elastic member is connected to the second piston.

[0016] Preferably, the first side of the second piston and the second cylinder form a third cavity, and the third elastic member is disposed in the third cavity.

[0017] Preferably, the first cylinder body is provided with a first jack communicating with the first cavity, the second cylinder body is provided with a second jack communicating with the second cavity, one end of the catheter is fixedly inserted into the first jack, and the other end is fixedly inserted into the second jack.

[0018] Preferably, the first control circuit includes a first power supply, and the first power supply is used to supply power to the first control circuit. The second control circuit includes a second power supply, and the second power supply is used to supply power to the second control circuit.

[0019] Beneficial effects:

[0020] In the brake assist device provided by the present invention, the contact plate is always in contact with the ground during vehicle operation. Due to the varying adhesion conditions of different roads, the corresponding degree of compression of the first elastic member also varies. For example, when the road's adhesion coefficient decreases, the friction generated by the contact plate and the ground decreases, and the compression of the first elastic member decreases, thereby reducing the force acting on the force-sensitive resistor, increasing the resistance of the force-sensitive resistor, and increasing the voltage applied to the first control member connected in parallel with the force-sensitive resistor. This increases the displacement of the first control member's control of the extended movable end of the first electric cylinder, thereby pushing the pressure fluid in the first chamber into the fluid conduit. When the driver is not pressing the brake pedal, that is, when the brake pedal remains in a stationary position, the shielding member can shield the fluid conduit, preventing the pressure fluid in the fluid conduit from entering the second chamber. When the driver brakes, he steps on the brake pedal, which drives the second piston to move downward. During this process, the blocking member moves downward with the second piston, gradually offset from the fluid guide tube, and releases the blocking effect on the fluid guide tube, so that the pressure liquid pressed into the fluid guide tube can enter the second chamber, and under the squeezing action of the second piston, it enters the brake cylinder together with the original pressure liquid in the second chamber, thereby acting on the vehicle's brakes, thereby realizing the role of automatic auxiliary strengthening of the braking effect when the road adhesion coefficient is reduced, which can effectively shorten the braking distance and prevent safety accidents caused by the reduction of the road adhesion coefficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of a portion of the structure of the brake assist device provided by the present invention;

[0022] Figure 2 is a structural diagram of the first control circuit part provided by the present invention;

[0023] Figure 3 is a schematic diagram of another part of the structure of the brake assist device provided by the present invention;

[0024] Figure 4 It is a structural diagram of the second control circuit part provided by the present invention.

[0025] In the picture:

[0026] 1. Adhesion detection assembly; 11. Contact plate; 12. First elastic member; 13. First control circuit; 131. Force-sensitive resistor; 132. First control member; 133. First power supply; 134. First fixed resistor; 14. Slide rail; 15. Sliding portion; 16. Second elastic member; 17. First housing;

[0027] 2. The first electric cylinder;

[0028] 3. First pressure cylinder; 301. First chamber; 31. First cylinder body; 311. First stopper; 32. First piston;

[0029] 4. Second pressure cylinder; 401. Second chamber; 402. Third chamber; 41. Second cylinder body; 411. Second stopper; 42. Second piston; 43. Liquid guide tube; 44. Shielding member; 45. Output tube; 46. Third elastic member;

[0030] 5. Pressure correction assembly; 51. Second electric cylinder; 52. Second control circuit; 521. Conductive pointer; 522. Long resistor; 523. Second control element; 524. Second power supply; 525. Second fixed resistor; 53. Second housing; 54. First connecting rod assembly; 541. First connecting rod; 542. Second connecting rod; 55. Second connecting rod assembly; 551. Third connecting rod; 552. Fourth connecting rod;

[0031] 6. Vehicle body; 61. Brake pedal. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0033] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0034] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0036] This embodiment provides a brake assist device. Figures 1 to 4 As shown, the brake assist device includes an adhesion detection component 1, a first electric cylinder 2, a first pressure cylinder 3 and a second pressure cylinder 4. The adhesion detection component 1 includes a contact plate 11, a first elastic member 12 and a first control circuit 13. The contact plate 11 is provided on the vehicle body 6 and can move relative to the vehicle body 6 along the length direction of the vehicle body 6 and is used to contact the ground. The first control circuit 13 includes a force-sensitive resistor 131 and a first control member 132 arranged in parallel. The first elastic member 12 is connected between the contact plate 11 and the force-sensitive resistor 131; the first electric cylinder 2 is communicatively connected to the first control member 132. When the first control member 132 is energized, it can control the movable end of the first electric cylinder 2 to extend relative to the fixed end, and the extension distance is proportional to the energized voltage of the first control member 132; the first pressure cylinder 3 includes a first cylinder body 31 and a first control member 132 provided in the first control circuit 13. A first piston 32 in a cylinder body 31, the first cylinder body 31 is fixed on the vehicle body 6, the first side of the first piston 32 is connected to the movable end of the first electric cylinder 2, and the second side of the first piston 32 and the first cylinder body 31 form a first chamber 301; the second pressure cylinder 4 includes a second cylinder body 41 and a second piston 42 arranged in the second cylinder body 41, the second cylinder body 41 is fixed on the vehicle body 6, the first side of the second piston 42 is connected to the brake pedal 61, the second side of the second piston 42 and the second cylinder body 41 form a second chamber 401, the first chamber 301 and the second chamber 401 are connected through a liquid guide tube 43, and a shielding member 44 that can block the liquid guide tube 43 is fixed on the second side of the second piston 42, the first chamber 301 and the second chamber 401 are both filled with pressure liquid, and the second chamber 401 is connected to the brake cylinder.

[0037] In this embodiment, Figure 1 The first direction indicated by the middle arrow is the direction of the front of vehicle body 6 and also the forward direction of the vehicle during travel. The first piston 32 is telescopically disposed within the first cylinder 31, and the second piston 42 is telescopically disposed within the second cylinder 41. The fixed end of the first electric cylinder 2 is fixed to vehicle body 6, and the fixed end of the second electric cylinder 51 is also fixed to vehicle body 6.

[0038] In this embodiment, an output pipe 45 is provided on the second cylinder body 41 . One end of the output pipe 45 is connected to the second chamber 401 , and the other end is connected to the brake cylinder (not shown).

[0039] Specifically, when the vehicle body 6 is traveling in a first direction, the contact plate 11 is configured to contact the ground. Due to different adhesion coefficients during driving on different roads, the friction generated by the contact plate 11 and the ground varies, corresponding to different degrees of compression of the first elastic member 12. For example, when the road adhesion coefficient decreases, the friction generated by the contact plate 11 and the ground decreases, and the compression of the first elastic member 12 decreases. This reduces the force acting on the force-sensitive resistor 131, increasing its resistance. This increases the voltage applied to the first control member 132 connected in parallel with the force-sensitive resistor 131, increasing the displacement of the movable end of the first electric cylinder 2 controlled by the first control member 132, and thereby pushing the pressure fluid in the first chamber 301 into the fluid conduit 43. The brake pedal 61 remains in a static position when no external force is applied. When the brake pedal 61 is in the static position, the shielding member 44 shields the fluid conduit 43, preventing the pressure fluid in the fluid conduit 43 from entering the second chamber 401. When the driver brakes, they press brake pedal 61, driving second piston 42 downward. During this process, shielding member 44 moves downward along with second piston 42, gradually disengaging shielding member 44 from fluid conduit 43, gradually releasing its blocking effect on fluid conduit 43 and allowing the pressurized fluid pressed into fluid conduit 43 to enter second chamber 401. Under the squeezing action of second piston 42, the pressurized fluid, along with the existing pressurized fluid in second chamber 401, enters the brake cylinder, applying the vehicle's brakes. This automatically assists in enhancing braking when the road adhesion coefficient decreases, effectively shortening braking distance and preventing safety accidents caused by reduced road adhesion.

[0040] Specifically, a first socket (not shown) communicating with the first cavity 301 is provided on the first cylinder body 31, and a second socket (not shown) communicating with the second cavity 401 is provided on the second cylinder body 41. One end of the liquid guide tube 43 is fixedly inserted into the first socket, and the other end is fixedly inserted into the second socket.

[0041] Specifically, the first control circuit 13 includes a first power supply 133 for supplying power to the first control circuit 13. The first control circuit 13 also includes a first fixed resistor 134, which is connected in series with the first power supply 133 and then in parallel with the force-sensitive resistor 131 and the first control element 132.

[0042] Specifically, the adhesion detection assembly 1 includes a slide rail 14 and a sliding portion 15. The slide rail 14 is fixed to the vehicle body 6 and extends along the length of the vehicle body 6. The sliding portion 15 is slidably mounted on the slide rail 14. The contact plate 11 is mounted on the sliding portion 15. One end of the first elastic member 12 is connected to the sliding portion 15 and the other end is connected to the force-sensitive resistor 131. In this embodiment, the slide rail 14 extends along a first direction relative to the vehicle body 6. The arrangement of the slide rail 14 and the sliding portion 15 enables the contact plate 11 to slide reliably and stably relative to the vehicle body 6 along the first direction.

[0043] Furthermore, a second elastic member 16 is connected between the contact plate 11 and the sliding portion 15, and the contact plate 11 can move in the vertical direction through the second elastic member 16. Specifically, Figure 1 The second direction is the vertical direction. By providing the second elastic member 16 , the contact plate 11 can be moved in the vertical direction, so that when the contact plate 11 contacts a bump or a pit on the road surface, it can pass smoothly.

[0044] Further, continue to refer to Figures 1 to 4 As shown, the brake assist device also includes a pressure correction component 5, which includes a second electric cylinder 51 and a second control circuit 52. The fixed end of the second electric cylinder 51 is fixed on the sliding part 15, and the two ends of the second elastic member 16 are respectively connected to the contact plate 11 and the movable end of the second electric cylinder 51. The second control circuit 52 includes a conductive pointer 521, a long resistor 522 and a second control member 523. The conductive pointer 521 can slidably contact the long resistor 522, and the long resistor 522 is fixedly connected to the contact plate 11. The conductive pointer 521 is fixedly connected to the movable end of the second electric cylinder 51. The conductive pointer 521, the long resistor 522 are away from the side of the contact plate 11 and the second control member 523 are arranged in series. The second electric cylinder 51 is communicatively connected to the second control member 523. When the second control member 523 is energized, it can control the movable end of the second electric cylinder 51 to extend relative to the fixed end, and the extension distance is proportional to the power voltage of the second control member 523. In this embodiment, by providing a pressure correction component 5, the pressure correction component 5 can keep the overall length of the second elastic member 16 relatively stable, and thus can ensure that the positive pressure between the contact plate 11 and the road surface on which the vehicle is traveling remains stable when the contact plate 11 contacts a bump or pit on the road surface, avoiding fluctuations in the positive pressure between the contact plate 11 and the ground, and ensuring that only the adhesion coefficient variable changes when the contact plate 11 contacts different road surfaces.

[0045] For example, when the contact plate 11 contacts a raised surface, the overall length of the second elastic member 16 shortens, i.e., the second elastic member 16 is compressed. If the length of the second elastic member 16 is not adjusted, the pressure exerted by the second elastic member 16 on the contact plate will increase. In this embodiment, the long resistor 522 and the conductive pointer 521 can form a sliding rheostat structure. After the contact plate 11 contacts the raised surface, it moves vertically upward, driving the long resistor 522 to move relative to the conductive pointer 521. This causes the conductive pointer 521 to slide on the long resistor 522, increasing the portion of the series circuit connected to the long resistor 522 and, correspondingly, increasing the resistance. This increases the voltage across the long resistor 522, thereby decreasing the voltage received by the second control member 523 connected in series with the long resistor 522. This controls the extension distance of the movable end of the second electric cylinder 51 relative to the fixed end, i.e., retracts the movable end of the second electric cylinder 51, driving the second elastic member 16 to extend and return to its original length, thus ensuring a relatively stable overall length of the second elastic member 16.

[0046] In this embodiment, the second control circuit 52 includes a second power supply 524 for supplying power to the second control circuit 52. The second control circuit 52 also includes a second fixed resistor 525. The conductive pointer 521, the long resistor 522, and the second control element 523 are connected in series and then in parallel with the second fixed resistor 525.

[0047] Continue to refer to Figure 1 、 Figure 2 As shown, the adhesion detection assembly 1 includes a first housing 17, which is fixed to the vehicle body 6. A first control member 132 is disposed within the first housing 17. A first end of a force-sensitive resistor 131 is connected in parallel with the first control member 132 and is located within the first housing 17. A second end of the force-sensitive resistor 131 extends outside the first housing 17 and is connected to the first elastic member 12. The arrangement of the first housing 17 accommodates and effectively protects the first control circuit 13.

[0048] Continue to refer to Figure 1 、 Figure 4 As shown, the pressure correction assembly 5 includes a second housing 53 fixed to the vehicle body 6. The second control circuit 52 is located within the second housing 53. A first connecting rod assembly 54 is fixedly mounted on the contact plate 11 and extends into the second housing 53 to be fixedly connected to a long resistor 522. A second connecting rod assembly 55 is fixedly mounted on the movable end of the second electric cylinder 51 and extends into the second housing 53 to be fixedly connected to the conductive pointer 521. The second housing 53 accommodates and effectively protects the second control circuit 52.

[0049] Specifically, the first connecting rod assembly 54 includes a first connecting rod 541 and a second connecting rod 542. The first connecting rod 541 extends in a first direction, and the second connecting rod 542 extends in a second direction. The first end of the first connecting rod 541 is connected to the contact plate 11, and the second end of the first connecting rod 541 is connected to the first end of the second connecting rod 542. The second end of the second connecting rod 542 extends into the second housing 53 and is connected to the long resistor 522. The second connecting rod assembly 55 includes a third connecting rod 551 and a fourth connecting rod 552. The third connecting rod 551 extends in the first direction, and the fourth connecting rod 552 extends in the second direction. The first end of the third connecting rod 551 is connected to the movable end of the second electric cylinder 51, and the second end of the third connecting rod 551 is connected to the first end of the fourth connecting rod 552. The second end of the fourth connecting rod 552 extends into the second housing 53 and is connected to the conductive pointer 521.

[0050] Further, refer to Figure 3 As shown, a third elastic member 46 is disposed within the second cylinder 41. One end of the third elastic member 46 is connected to the second cylinder 41, and the other end of the third elastic member 46 is connected to the second piston 42. The provision of the third elastic member 46 can drive the second piston 42 to reset relative to the second cylinder 41, thereby driving the brake pedal 61 to reset.

[0051] Furthermore, the first side of the second piston 42 and the second cylinder body 41 form a third cavity 402, and the third elastic member 46 is disposed in the third cavity 402. This arrangement can prevent the third elastic member 46 from being exposed to the external environment and better protect the third elastic member 46.

[0052] Furthermore, a first limiting member 311 is provided in the first cylinder body 31, and the first limiting member 311 is used to limit the sliding of the first piston 32 relative to the first cylinder body 31; a second limiting member 411 is provided in the second cylinder body 41, and the second limiting member 411 is used to limit the sliding of the second piston 42 relative to the second cylinder body 41.

[0053] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A brake assist device, characterized in that: include: An adhesion detection assembly (1) comprises a contact plate (11), a first elastic member (12) and a first control circuit (13), wherein the contact plate (11) is provided on a vehicle body (6), is movable relative to the vehicle body (6) along the length direction of the vehicle body (6) and is used to contact the ground, the first control circuit (13) comprises a force-sensitive resistor (131) and a first control member (132) arranged in parallel, and the first elastic member (12) is connected between the contact plate (11) and the force-sensitive resistor (131); A first electric cylinder (2) is communicatively connected to the first control member (132), and the first control member (132) is energized to control the movable end of the first electric cylinder (2) to extend relative to the fixed end, and the extension distance is proportional to the energized voltage of the first control member (132); A first pressure cylinder (3) comprises a first cylinder body (31) and a first piston (32) disposed in the first cylinder body (31), wherein the first cylinder body (31) is fixed to the vehicle body (6), a first side of the first piston (32) is connected to the movable end of the first electric cylinder (2), and a second side of the first piston (32) and the first cylinder body (31) form a first cavity (301); a second pressure cylinder (4), comprising a second cylinder body (41) and a second piston (42) disposed in the second cylinder body (41); the second cylinder body (41) is fixed to the vehicle body (6); a first side of the second piston (42) is connected to the brake pedal (61); a second side of the second piston (42) and the second cylinder body (41) form a second chamber (401); the first chamber (301) and the second chamber (401) are communicated with each other via a fluid conduit (43); a shielding member (44) capable of shielding the fluid conduit (43) is fixed to the second side of the second piston (42); the first chamber (301) and the second chamber (401) are both filled with pressure fluid; and the second chamber (401) is connected to the brake cylinder; The adhesion detection assembly (1) comprises a slide rail (14) and a sliding portion (15), wherein the slide rail (14) is fixed to the vehicle body (6) and extends along the length direction of the vehicle body (6), the sliding portion (15) is slidably arranged on the slide rail (14), the contact plate (11) is arranged on the sliding portion (15), and one end of the first elastic member (12) is connected to the sliding portion (15) and the other end is connected to the force-sensitive resistor (131); A second elastic member (16) is connected between the contact plate (11) and the sliding portion (15), and the contact plate (11) is able to move in a vertical direction via the second elastic member (16); The pressure correction assembly (5) further comprises a second electric cylinder (51) and a second control circuit (52), wherein the fixed end of the second electric cylinder (51) is fixed to the sliding portion (15), and the two ends of the second elastic member (16) are respectively connected to the contact plate (11) and the movable end of the second electric cylinder (51), and the second control circuit (522) comprises a conductive pointer (521), a long resistor (522) and a second control member (523), wherein the conductive pointer (521) is slidably in contact with the long resistor (522), and the long resistor (523) is in contact with the second electric cylinder (51). 22) is fixedly connected to the contact disk (11), the conductive pointer (521) is fixedly connected to the movable end of the second electric cylinder (51), the conductive pointer (521), the side of the long resistor (522) away from the contact disk (11) and the second control member (523) are arranged in series, the second electric cylinder (51) is communicatively connected to the second control member (523), and the second control member (523) is energized to control the movable end of the second electric cylinder (51) to extend relative to the fixed end, and the extension distance is proportional to the energized voltage of the second control member (523).

2. The brake assist device according to claim 1, wherein: The adhesion detection assembly (1) comprises a first box (17), the first box (17) being fixed to the vehicle body (6), the first control member (132) being arranged in the first box (17), the first end of the force-sensitive resistor (131) being connected in parallel with the first control member (132) and being located in the first box (17), and the second end of the force-sensitive resistor (131) extending out of the first box (17) and being connected to the first elastic member (12).

3. The brake assist device according to claim 1, wherein: The pressure correction assembly (5) includes a second box (53), the second box (53) is fixed on the vehicle body (6), the second control circuit (52) is located in the second box (53), a first connecting rod assembly (54) is fixedly provided on the contact plate (11), the first connecting rod assembly (54) extends into the second box (53) and is fixedly connected to the long resistor (522), and a second connecting rod assembly (55) is fixedly provided on the movable end of the second electric cylinder (51), the second connecting rod assembly (55) extends into the second box (53) and is fixedly connected to the conductive pointer (521).

4. The brake assist device according to claim 1, wherein: A third elastic member (46) is provided in the second cylinder (41), one end of the third elastic member (46) is connected to the second cylinder (41), and the other end of the third elastic member (46) is connected to the second piston (42).

5. The brake assist device according to claim 4, characterized in that: A third chamber (402) is formed between the first side of the second piston (42) and the second cylinder body (41), and the third elastic member (46) is disposed in the third chamber (402).

6. The brake assist device according to claim 1, wherein: The first cylinder body (31) is provided with a first jack communicating with the first cavity (301), the second cylinder body (41) is provided with a second jack communicating with the second cavity (401), one end of the liquid guide tube (43) is fixedly inserted into the first jack, and the other end is fixedly inserted into the second jack.

7. The brake assist device according to claim 1, wherein: The first control circuit (13) includes a first power supply (133), and the first power supply (133) is used to supply power to the first control circuit (13). The second control circuit (52) includes a second power supply (524), and the second power supply (524) is used to supply power to the second control circuit (52).

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