Electromechanical brake booster device and method of use

Abstract

The present invention discloses an electromechanical brake booster and a method of use, belonging to the field of electromechanical braking. An electromechanical brake booster comprises a housing, and also comprises: a brake push rod and a pedal push rod arranged on the housing, a booster unit is arranged between the brake push rod and the pedal push rod, the booster unit divides the interior of the housing into two air chambers, and is used to amplify the thrust on the brake push rod when the pedal push rod moves toward the side of the brake push rod; a dustproof unit is arranged on the side of the housing close to the pedal push rod, and is used to prevent dust from the air chamber in the housing; a backup brake mechanism is arranged between the interior of the housing and the booster unit, and when the pressure difference between the air chambers in the housing disappears or weakens, pushing the pedal push rod can drive the booster unit to move through the backup brake mechanism; the present invention overcomes the problems of high accident risk, poor vehicle braking performance, easy clogging of the air filter, and short service life of the brake system when the brake booster fails.

Description

Technical Field

[0001] The present invention relates to the field of electromechanical braking technology, and in particular to an electromechanical brake booster device and a use method thereof. Background Art

[0002] Controlling the brake pedal with manpower alone is a physically demanding task, especially for disc brakes that require greater braking force; therefore, vehicles are usually equipped with a brake booster, which is one of the important components of the vehicle. It uses the difference between the vacuum generated by the vacuum pump and the atmospheric pressure to significantly enhance the braking effect, making it easier to step on the brake pedal, thereby ensuring safe and rapid braking while driving.

[0003] When the current brake booster fails, such as leaking or failing in the vacuum pressure sensor, the operator will feel that the brakes have become unusually heavy, and in this case, it is difficult to generate enough braking force to stop the vehicle relying solely on manpower, which greatly increases the risk of accidents. In addition, after the brake booster has been working for a long time, the air filter is prone to clogging, which can easily reduce the braking performance of the vehicle, and can also cause the brake system to overheat and increase component wear, affecting the service life of the brake system. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art of high accident risk, poor vehicle braking performance, easy clogging of the air filter and short service life of the brake system when the brake booster fails, and to propose an electromechanical brake booster and a method of use.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An electromechanical brake booster device comprises a shell, and also includes: a brake push rod and a pedal push rod arranged on the shell, a booster unit is arranged between the brake push rod and the pedal push rod, the booster unit divides the interior of the shell into two air chambers, and is used to amplify the thrust on the brake push rod when the pedal push rod moves toward the brake push rod; a dustproof unit is arranged on the side of the shell close to the pedal push rod, and is used to dustproof the air chamber in the shell; a backup brake mechanism is arranged between the interior of the shell and the booster unit, and when the pressure difference between the air chambers in the shell disappears or weakens, pushing the pedal push rod can drive the booster unit to move through the backup brake mechanism, wherein the backup brake mechanism and the dustproof unit are connected through a pipeline.

[0007] In order to ensure the stability of vehicle braking, preferably, the power assist unit includes an air chamber diaphragm fixedly connected to the inner side wall of the shell near the pedal push rod side, the air chamber diaphragm is provided with a diaphragm partition on the side away from the inner side wall of the shell, a reaction disk is provided on the diaphragm partition close to the brake push rod side, the reaction disk is connected to the brake push rod, a return spring is fixedly connected between the diaphragm partition and the shell close to the brake push rod side, an air valve is provided on the diaphragm partition close to the pedal push rod side, a fixing plate is fixedly connected to the air valve, a valve spring sleeved on the pedal push rod is fixedly connected to the fixing plate, and a push rod spring is fixedly connected between the side of the fixing plate away from the air valve and the pedal push rod, wherein the space of the air chamber diaphragm and the diaphragm partition close to the brake push rod side is larger than the space close to the pedal push rod side, the brake push rod is located inside the return spring, and part of the air valve extends to the other side of the diaphragm partition.

[0008] In order to improve the applicability and stability of the vehicle braking system, further, one end of the brake push rod extends to the interior of the outer shell, and a connecting cylinder is fixedly connected to the side of the outer shell close to the brake push rod, and the outer side of the connecting cylinder is connected to two groups of air extraction ports, wherein the connecting cylinder is connected to the air chamber in the outer shell.

[0009] In order to facilitate the formation of a pressure difference between the two air chambers in the shell, further, the shell is connected to a side close to the pedal push rod with an extension tube, part of the structure of the air valve is fixedly connected to the inner wall of the extension tube, and the pedal push rod extends from the extension tube to the inside of the shell.

[0010] In order to prevent dust in the air from entering the device and affecting the braking performance of the vehicle, the dustproof unit further includes a filter fixedly connected to the side of the extension tube away from the outer shell, the pedal push rod passes through the filter, and multiple groups of compression cylinders are fixedly connected between the side of the fixing plate away from the air valve and the pedal push rod, and an impact cylinder is fixedly connected to the outer wall of the compression cylinder, wherein the impact cylinder is elastic and the movable end of the impact cylinder is close to the filter.

[0011] In order to facilitate the continued stable braking of the vehicle when a failure occurs in the main braking system, the backup braking mechanism further includes a plurality of backup chambers fixedly connected to the inner wall of the outer shell, a partition plate fixedly connected to the interior of the backup chamber, the partition plate divides the backup chamber into two groups of chambers, a one-way valve is arranged on the side of the backup chamber close to the inner wall of the outer shell, and two groups of solenoid valves are arranged on the side of the backup chamber away from the inner wall of the outer shell, wherein the flow direction of the one-way valve is from the backup chamber to the inside of the outer shell, and the two groups of solenoid valves are respectively located on the side of the backup chamber close to and away from the partition plate.

[0012] In order to enhance the braking performance when the main brake system fails, it further includes a pneumatic valve arranged on the partition plate, a sealing slider is slidably connected in the spare chamber away from the inner side wall of the outer shell, and a connecting column is fixedly connected to the side of the sealing slider away from the partition plate, and a reaction spring is connected between the sealing slider and the partition plate, wherein a sealed connection is adopted between the sealing slider and the inner side wall of the spare chamber, and one end of the connecting column away from the sealing slider extends to the outside of the spare chamber, and the pneumatic valve is connected to the compression cylinder through a pipeline.

[0013] In order to avoid the dustproof unit from being blocked, it further includes a plurality of driving cylinders fixedly connected to the side of the partition plate close to the sealing slider, the driving cylinders are connected to the impact cylinders through pipes, and the driving cylinders are elastic.

[0014] In order to ensure the stable operation of the backup brake mechanism, further, the diaphragm partition is fixedly connected to a limiting slide rail on one side close to the backup chamber, and the end of the connecting column away from the sealing slider is slidably connected to the limiting slide rail, and the connecting column and the limiting slide rail are vertically arranged.

[0015] A method for using an electromechanical brake booster comprises the following steps:

[0016] Step 1: Install the device in the vehicle's brake system. If the vehicle is a fuel vehicle, the engine's air intake hole can be connected to the device. If the vehicle is an electric vehicle, air can be sucked through a vacuum pump.

[0017] Step 2: Under the action of the vehicle's engine or vacuum pump, one of the air chambers in the device is placed in a vacuum state, forming a pressure difference with the normal air pressure of the other air chamber;

[0018] Step 3: When the operator brakes the vehicle, this pressure difference will be used to increase the thrust during braking, braking the vehicle faster and more effectively, while preventing dust from the outside air from entering through the dust protection unit;

[0019] Step 4: When the equipment leaks, that is, when the pressure difference between the air chambers on both sides disappears or weakens, the backup brake mechanism in the equipment can continue to brake the vehicle in a short time to improve driving safety;

[0020] Step 5: During the braking process, the backup braking mechanism can also achieve an impact effect between some structures in the dustproof unit, so that dust adsorbed on the dustproof unit falls off, thereby improving the stability of the equipment during use.

[0021] Compared with the prior art, the present invention provides an electromechanical brake booster device and a method of use, which have the following beneficial effects:

[0022] 1. The electromechanical brake booster can amplify the operator's braking force on the vehicle through the booster unit, so that the vehicle can achieve rapid and effective braking. During the braking process, the dust-proof unit can prevent dust in the air from entering the device, thereby ensuring the braking performance of the device.

[0023] 2. When the electromechanical brake booster has air leakage or the vacuum pressure sensor fails, the operator can use the backup brake mechanism to achieve normal braking of the vehicle in a short time when braking the vehicle, and can also increase the forced braking thrust in the case of insufficient vacuum, so that the vehicle can stop stably, thereby reducing the risk of accidents during driving.

[0024] 3. The electromechanical brake booster can also impact the dustproof unit through the backup brake mechanism, so that the dust adsorbed on the dustproof unit falls off, thereby avoiding clogging of the dustproof unit, improving the braking performance of the vehicle and extending the service life of the vehicle braking system.

[0025] The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The present invention can overcome the problems of high risk of accidents when the brake booster fails, poor vehicle braking performance, easy clogging of the air filter, and short service life of the brake system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of an electromechanical brake booster proposed by the present invention Figure 1 .

[0027] Figure 2 A schematic diagram of the structure of an electromechanical brake booster proposed by the present invention Figure 2 .

[0028] Figure 3 The present invention is a schematic cross-sectional view of an electromechanical brake booster device.

[0029] Figure 4 An electromechanical brake booster device proposed by the present invention Figure 3 Schematic diagram of the local structure in.

[0030] Figure 5 The present invention provides a partial structural schematic diagram of a backup brake mechanism in an electromechanical brake booster device.

[0031] Figure 6 An electromechanical brake booster device proposed by the present invention Figure 3 Schematic diagram of the structure of part A.

[0032] In the figure: 1. outer shell; 2. connecting cylinder; 3. brake push rod; 4. exhaust port; 5. extension cylinder; 6. filter; 7. pedal push rod; 8. air chamber diaphragm; 9. diaphragm partition; 10. limit slide rail; 11. spare brake mechanism; 111. spare chamber; 112. partition plate; 113. one-way valve; 114. pneumatic valve; 115. solenoid valve; 116. sealing slider; 117. connecting column; 118. reaction spring; 119. driving cylinder; 12. reset spring; 13. reaction disk; 14. air valve; 15. fixing plate; 16. compression cylinder; 17. impact cylinder; 18. valve spring; 19. push rod spring. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Example

[0035] Reference Figure 1-Figure 6 , an electromechanical brake booster device, including a shell 1, and also including: a brake push rod 3 and a pedal push rod 7 arranged on the shell 1. It needs to be explained that the brake push rod 3 is connected to the braking device of the vehicle, and the pedal push rod 7 is connected to the brake pedal of the vehicle. This is a conventional means in the prior art, so it is not repeated here. A booster unit is arranged between the brake push rod 3 and the pedal push rod 7. The booster unit divides the interior of the shell 1 into two air chambers. When the pedal push rod 7 moves toward the side of the brake push rod 3, it is used to amplify the thrust on the brake push rod 3; a dustproof unit arranged on the side of the shell 1 close to the pedal push rod 7 is used to dustproof the air chamber in the shell 1; a backup brake mechanism 11 is arranged between the inside of the shell 1 and the booster unit. When the pressure difference between the air chambers in the shell 1 disappears or weakens, pushing the pedal push rod 7 can drive the booster unit to move through the backup brake mechanism 11, wherein the backup brake mechanism 11 and the dustproof unit are connected through a pipeline.

[0036] Reference Figure 3-Figure 4The boost unit includes an air chamber diaphragm 8 fixedly connected to the inner side wall of the shell 1 near the pedal push rod 7, a diaphragm partition 9 is arranged on the side of the air chamber diaphragm 8 away from the inner side wall of the shell 1, a reaction disk 13 is arranged on the side of the diaphragm partition 9 near the brake push rod 3, the reaction disk 13 is connected to the brake push rod 3, a return spring 12 is fixedly connected between the diaphragm partition 9 and the shell 1 near the side of the brake push rod 3, an air valve 14 is arranged on the side of the diaphragm partition 9 near the pedal push rod 7, a fixing plate 15 is fixedly connected to the air valve 14, a valve spring 18 sleeved on the pedal push rod 7 is fixedly connected to the fixing plate 15, a push rod spring 19 is fixedly connected between the side of the fixing plate 15 away from the air valve 14 and the pedal push rod 7, wherein the space between the air chamber diaphragm 8 and the diaphragm partition 9 near the brake push rod 3 is larger than the space near the pedal push rod 7, the brake push rod 3 is located inside the return spring 12, and part of the air valve 14 extends to the other side of the diaphragm partition 9.

[0037] The specific structure of the air valve 14 can refer to the technical solutions in the prior art. Technicians in this field can know it and will not be elaborated here. The air valve 14 usually includes a valve seat and a valve core. The valve seat and the valve core can be separated by the pedal push rod 7. When the air valve 14 is in the open state, the braking force can be amplified by the pressure difference between the air chambers on both sides, thereby easily realizing the braking of the vehicle. The principle of the above-mentioned vehicle braking is a conventional means in the prior art, so it will not be elaborated here.

[0038] Reference Figure 1 and Figure 3 One end of the brake push rod 3 extends to the interior of the shell 1, and a connecting tube 2 is fixedly connected to the side of the shell 1 close to the brake push rod 3. The outer side of the connecting tube 2 is connected with two groups of air exhaust ports 4, wherein the connecting tube 2 is connected to the air chamber in the shell 1.

[0039] If it is a fuel vehicle, one group of the exhaust ports 4 can be connected to the air intake port of the engine, and the other group of the exhaust ports 4 can be connected to an external vacuum pump to avoid affecting the braking performance of the vehicle when the engine does not have enough air intake. When the engine is running normally, energy consumption can be reduced. If it is an electric vehicle, one group of the exhaust ports 4 can be blocked and the other group can be connected to the vacuum pump.

[0040] Reference Figure 2-Figure 4 The side of the shell 1 close to the pedal push rod 7 is connected to the extension tube 5, and part of the structure of the air valve 14 is fixedly connected to the inner wall of the extension tube 5. The pedal push rod 7 extends from the extension tube 5 to the inside of the shell 1.

[0041] The end of the extension tube 5 is connected to the air, so that the air chambers on both sides of the air chamber diaphragm 8 are in a vacuum state and a normal air pressure state respectively, thereby forming a pressure difference. It should be explained that a sealed sliding connection is adopted between the pedal push rod 7 and the filter 6. This is a conventional means in the prior art, so it will not be elaborated.

[0042] Reference Figure 3-Figure 4 The dustproof unit includes a filter 6 fixedly connected to the side of the extension tube 5 away from the outer shell 1, the pedal push rod 7 penetrates the filter 6, and a plurality of groups of compression cylinders 16 are fixedly connected between the side of the fixing plate 15 away from the air valve 14 and the pedal push rod 7. An impact cylinder 17 is fixedly connected to the outer wall of the compression cylinder 16, wherein the impact cylinder 17 is elastic and the movable end of the impact cylinder 17 is close to the filter 6.

[0043] The connection method between the filter 6 and the extension tube 5 can refer to the technical solution in the prior art. Initially, the impact cylinder 17 is at the shortest stroke and there is a certain distance between it and the filter 6. In addition, there is no limit on the number of compression cylinders 16 and impact cylinders 17, and they can be adjusted according to specific braking requirements and dust removal effects.

[0044] Reference Figure 3 and Figure 5 The standby braking mechanism 11 includes a plurality of standby chambers 111 fixedly connected to the inner wall of the outer shell 1, a partition plate 112 is fixedly connected to the interior of the standby chamber 111, the partition plate 112 divides the standby chamber 111 into two groups of chambers, a one-way valve 113 is arranged on the side of the standby chamber 111 close to the inner wall of the outer shell 1, and two groups of solenoid valves 115 are arranged on the side of the standby chamber 111 away from the inner wall of the outer shell 1, wherein the flow direction of the one-way valve 113 is from the standby chamber 111 to the inside of the outer shell 1, and the two groups of solenoid valves 115 are respectively located on the side of the standby chamber 111 close to and away from the partition plate 112.

[0045] When the air chamber close to the brake push rod 3 is evacuated, as the air pressure in the air chamber decreases, a pressure difference occurs between the spare chamber 111 and the air chamber, causing the one-way valve 113 to open. At this time, the gas in the spare chamber 111 is flushed out, and the gas in the other spare chamber 111 is the same as the air pressure in the air chamber under the action of the solenoid valve 115. When the equipment fails, the pressure in the air chamber increases. At this time, there is a pressure difference between the spare chambers 111 on both sides, so as to provide forced braking thrust when the equipment fails.

[0046] Reference Figure 5, also includes a pneumatic valve 114 arranged on the partition plate 112, a sealing slider 116 is slidably connected in the spare chamber 111 on the side of the inner wall away from the shell 1, and a connecting column 117 is fixedly connected to the side of the sealing slider 116 away from the partition plate 112, and a reaction spring 118 is connected between the sealing slider 116 and the partition plate 112, wherein the sealing slider 116 and the inner wall of the spare chamber 111 are sealed. The end of the connecting column 117 away from the sealing slider 116 extends to the outside of the spare chamber 111, and the pneumatic valve 114 is connected to the compression cylinder 16 through a pipeline. It also includes a plurality of driving cylinders 119 fixedly connected to the side of the partition plate 112 close to the sealing slider 116, and the driving cylinder 119 is connected to the impact cylinder 17 through a pipeline, and the driving cylinder 119 is elastic.

[0047] It should be explained that when the equipment is operating normally, both sets of solenoid valves 115 are in an open state. When the equipment fails, the solenoid valve 115 close to the partition plate 112 is in a closed state, and the other solenoid valve 115 is in an open state. This is a conventional method in the prior art and is not described in detail. When the equipment is operating normally, since the air chamber is connected to one set of spare chambers 111, the diaphragm partition 9 will drive the connecting column 117 and the sealing slider 116 to move in the corresponding spare chamber 111 during the movement, which will not affect the braking of the vehicle. When the equipment fails, the sealing slider 116 will move to the side of the partition plate 112 under the action of air pressure, thereby achieving the braking of the vehicle. In addition, the pneumatic valve 114 and the compressed air The cylinder 16 and the pipeline between the driving cylinder 119 and the impact cylinder 17 can all pass through the side wall of the outer shell 1, and adopt a sealed connection method, which will not affect the operation of the equipment. No matter whether the equipment is in normal use or faulty state, when the vehicle is braking, the sealing slider 116 will move toward the side of the driving cylinder 119 and compress it, and discharge the compressed gas into the impact cylinder 17. Due to the high pressure difference, the movement speed of the diaphragm diaphragm 9 is relatively fast, so the gas in the driving cylinder 119 will also quickly enter the impact cylinder 17, so that the impact cylinder 17 impacts the filter 6, generating a vibration effect, and shaking off some dust adsorbed on the filter 6 to prevent it from being blocked during use.

[0048] Reference Figure 3 and Figure 6 The side of the diaphragm partition 9 close to the spare chamber 111 is fixedly connected to the limiting slide rail 10, and the end of the connecting column 117 away from the sealing slider 116 is slidably connected to the limiting slide rail 10, and the connecting column 117 and the limiting slide rail 10 are vertically arranged.

[0049] During the braking process of the vehicle, the diaphragm partition 9 will move axially along the outer shell 1. During the movement, the connecting column 117 is always located inside the limiting slide rail 10, but its connection position will change. In addition, there is no limitation on the shapes of the limiting slide rail 10 and the ends of the connecting column 117. As long as the ends of the connecting column 117 can move along the limiting slide rail 10 without falling off, they will not be elaborated here. Example

[0050] A method for using an electromechanical brake booster comprises the following steps:

[0051] Step 1: Install the device in the vehicle's brake system. If the vehicle is a fuel vehicle, the engine's air intake hole can be connected to the device. If the vehicle is an electric vehicle, air can be sucked through a vacuum pump.

[0052] Step 2: Under the action of the vehicle's engine or vacuum pump, one of the air chambers in the device is placed in a vacuum state, forming a pressure difference with the normal air pressure of the other air chamber;

[0053] Step 3: When the operator brakes the vehicle, this pressure difference will be used to increase the thrust during braking, braking the vehicle faster and more effectively, while preventing dust from the outside air from entering through the dust protection unit;

[0054] Step 4: When the device leaks, that is, when the pressure difference between the air chambers on both sides disappears or weakens, the backup brake mechanism 11 in the device can achieve continued braking of the vehicle in a short time to improve driving safety;

[0055] Step 5: During the braking process, the backup braking mechanism 11 can also achieve an impact effect between some structures in the dustproof unit, so that dust adsorbed on the dustproof unit falls off, thereby improving the stability of the device during use.

[0056] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An electromechanical brake booster device, comprising a housing (1), characterized in that: Also includes: A brake push rod (3) and a pedal push rod (7) are arranged on the housing (1), and a booster unit is arranged between the brake push rod (3) and the pedal push rod (7). The booster unit divides the interior of the housing (1) into two air chambers and is used to amplify the thrust on the brake push rod (3) when the pedal push rod (7) moves toward the side of the brake push rod (3); A dustproof unit arranged on a side of the housing (1) close to the pedal push rod (7), used to prevent dust from entering the air chamber in the housing (1); A backup brake mechanism (11) is arranged between the inside of the housing (1) and the power-assisting unit. When the pressure difference between the air chambers in the housing (1) disappears or weakens, pushing the pedal push rod (7) can drive the power-assisting unit to move via the backup brake mechanism (11), wherein the backup brake mechanism (11) is connected to the dust-proof unit via a pipeline.

2. An electromechanical brake booster according to claim 1, characterized in that: The booster unit comprises an air chamber diaphragm (8) fixedly connected to the inner side wall of the housing (1) near the pedal push rod (7); a diaphragm partition (9) is provided on the side of the air chamber diaphragm (8) away from the inner side wall of the housing (1); a reaction disk (13) is provided on the side of the diaphragm partition (9) near the brake push rod (3); the reaction disk (13) is connected to the brake push rod (3); a return spring (12) is fixedly connected between the diaphragm partition (9) and the housing (1) near the brake push rod (3); an air valve (14) is provided on the side of the diaphragm partition (9) near the pedal push rod (7); a fixing plate (15) is fixedly connected to the air valve (14); a valve spring (18) sleeved on the pedal push rod (7) is fixedly connected to the fixing plate (15); a push rod spring (19) is fixedly connected between the side of the fixing plate (15) away from the air valve (14) and the pedal push rod (7); The space between the air chamber diaphragm (8) and the diaphragm partition (9) on the side close to the brake push rod (3) is larger than the space on the side close to the pedal push rod (7); the brake push rod (3) is located inside the return spring (12); and part of the air valve (14) extends to the other side of the diaphragm partition (9).

3. An electromechanical brake booster according to claim 2, characterized in that: One end of the brake push rod (3) extends into the interior of the housing (1); a connecting tube (2) is fixedly connected to the side of the housing (1) close to the brake push rod (3); the outer side of the connecting tube (2) is connected to two groups of air extraction ports (4); wherein the connecting tube (2) is connected to the air chamber in the housing (1).

4. An electromechanical brake booster according to claim 3, characterized in that: The side of the housing (1) close to the pedal push rod (7) is connected to an extension tube (5), a part of the structure of the air valve (14) is fixedly connected to the inner wall of the extension tube (5), and the pedal push rod (7) extends from the extension tube (5) to the inside of the housing (1).

5. An electromechanical brake booster according to claim 4, characterized in that: The dustproof unit comprises a filter (6) fixedly connected to a side of the extension tube (5) away from the housing (1); the pedal push rod (7) penetrates the filter (6); a plurality of groups of compression cylinders (16) are fixedly connected between a side of the fixing plate (15) away from the air valve (14) and the pedal push rod (7); an impact cylinder (17) is fixedly connected to an outer wall of the compression cylinder (16); The impact cylinder (17) is elastic, and the movable end of the impact cylinder (17) is close to the filter (6).

6. An electromechanical brake booster according to claim 5, characterized in that: The backup braking mechanism (11) comprises a plurality of groups of backup chambers (111) fixedly connected to the inner wall of the housing (1); a partition plate (112) is fixedly connected to the interior of the backup chamber (111); the partition plate (112) divides the backup chamber (111) into two groups of chambers; a one-way valve (113) is provided on a side of the backup chamber (111) close to the inner wall of the housing (1); and two groups of solenoid valves (115) are provided on a side of the backup chamber (111) away from the inner wall of the housing (1). The flow direction of the one-way valve (113) is from the spare chamber (111) to the inside of the housing (1), and the two groups of solenoid valves (115) are respectively located on one side of the spare chamber (111) close to and away from the partition plate (112).

7. An electromechanical brake booster according to claim 6, characterized in that: It also comprises a pneumatic valve (114) arranged on the partition plate (112), a sealing slider (116) being slidably connected in the spare chamber (111) on the side away from the inner wall of the housing (1), a connecting column (117) being fixedly connected to the side of the sealing slider (116) away from the partition plate (112), and a reaction spring (118) being connected between the sealing slider (116) and the partition plate (112). The sealing slider (116) and the inner wall of the standby chamber (111) are connected in a sealed manner, one end of the connecting column (117) away from the sealing slider (116) extends to the outside of the standby chamber (111), and the pneumatic valve (114) and the compression cylinder (16) are connected via a pipeline.

8. An electromechanical brake booster according to claim 7, characterized in that: It also includes a plurality of groups of driving cylinders (119) fixedly connected to a side of the partition plate (112) close to the sealing slide block (116), the driving cylinders (119) being connected to the impact cylinder (17) via a pipeline, and the driving cylinders (119) are elastic.

9. The electromechanical brake booster according to claim 7, characterized in that: The side of the diaphragm partition (9) close to the spare chamber (111) is fixedly connected to the limiting slide rail (10), and the end of the connecting column (117) away from the sealing slider (116) is slidably connected to the limiting slide rail (10), and the connecting column (117) and the limiting slide rail (10) are arranged vertically.

10. A method for using the electromechanical brake booster according to any one of claims 1 to 9, characterized in that: The following steps are also included: Step 1: Install the device in the vehicle's brake system. If the vehicle is a fuel vehicle, the engine's air intake hole can be connected to the device. If the vehicle is an electric vehicle, air can be sucked through a vacuum pump. Step 2: Under the action of the vehicle's engine or vacuum pump, one of the air chambers in the device is placed in a vacuum state, forming a pressure difference with the normal air pressure of the other air chamber; Step 3: When the operator brakes the vehicle, this pressure difference will be used to increase the thrust during braking, braking the vehicle faster and more effectively, while preventing dust from the outside air from entering through the dust protection unit; Step 4: When the device leaks, that is, when the pressure difference between the air chambers on both sides disappears or weakens, the backup braking mechanism (11) in the device can achieve continued braking of the vehicle in a short period of time to improve driving safety; Step 5: During the braking process, the backup braking mechanism (11) can also achieve an impact effect between some structures in the dustproof unit, so that dust adsorbed on the dustproof unit falls off, thereby improving the stability of the device during use.

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