Drive-by-wire voltage buildup unit

Abstract

The utility model relates to the technical field of vehicle braking, in particular to a drive-by-wire pressure buildup unit which comprises a controller, a driving assembly and a brake cylinder with a piston. The output end of the driving assembly is connected with the piston; the controller is electrically connected with the driving assembly so as to control the driving assembly to drive the piston to reciprocate in the pressure buildup cavity in the brake cylinder. An original brake cylinder with a brake pedal is improved, the brake pedal is omitted, and the controller and the driving assembly are arranged at the brake cylinder, so that the brake cylinder can be changed into electric signal brake from original mechanical brake, and the brake efficiency is improved on the basis that the function of whole automobile wheel end drive-by-wire pressure buildup is achieved. The number of parts of the drive-by-wire voltage buildup unit can be reduced, the overall structure is simpler and more reliable, and the cost is low. The brake cylinder can be arranged at will according to the space of the whole automobile, so that the brake cylinder is not affected by the automobile forecabin space at the rear end of the brake pedal and the wheel end space, and the brake cylinder can be conveniently applied to more different automobile types.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle braking, and more specifically, to a wire-controlled pressure building unit. Background Art

[0002] At present, there are three layout schemes for existing automotive braking systems: one-box, two-box, and EMB. For the one-box or two-box scheme, as a pressure building unit, the braking pressure is transmitted to the four wheels through a brake pipe, which integrates various solenoid valves and coils. Its scheme has a complex structure, high cost, and large size, and can only be arranged at the rear end of the brake pedal, which is not conducive to the space layout in the front cabin of the whole vehicle. For the EMB scheme, its structure is that there are four motors, four sets of transmission mechanisms, and four sets of piston structures at the four wheel ends to provide braking force for the wheels. The cost is relatively high, and the space requirement for the wheel end is extremely high, and it cannot be applied to models with relatively small wheel end sizes.

[0003] In view of the above problems, the present application provides a wire-controlled pressure building unit, which adds structures such as a controller and a driving component to the traditional master cylinder. The driving component is fixed to the piston of the master cylinder, realizing the function of wire-controlled pressure building for the whole vehicle wheel end; and it has fewer parts, a simple and reliable structure, low cost, and can be arbitrarily arranged according to the space of the whole vehicle, not affected by the front cabin space at the rear end of the pedal and the wheel end space, and can be applied to more models. Summary of the Utility Model

[0004] In view of the above problems existing in the prior art, the utility model provides a wire-controlled pressure building unit.

[0005] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0006] A wire-controlled pressure building unit includes a controller, a driving component, and a brake cylinder with a piston; the output end of the driving component is connected to the piston;

[0007] The controller is electrically connected to the driving component to control the driving component to drive the piston to reciprocate in the pressure building cavity of the brake cylinder.

[0008] Preferably, the driving component includes a motor, a lead screw, and a nut;

[0009] The lead screw is fixedly connected to the rotor of the motor;

[0010] The nut is sleeved on the lead screw and connected to the piston;

[0011] The controller is electrically connected to the motor to drive the lead screw to rotate through the motor, so as to realize the nut driving the piston to reciprocate in the brake cylinder.

[0012] Preferably, the controller and the brake cylinder are respectively arranged on both sides of the motor.

[0013] Preferably, the controller includes a control board, and a housing and a cover plate capable of clamping and fixing the control board; the controller is electrically connected to the motor through the control board, and is fixedly connected to the motor through the housing.

[0014] Preferably, a first detection component electrically connected to the control board is provided on the controller, and a second detection component is provided on the rotor and / or the lead screw;

[0015] When the rotor and / or the lead screw drives the second detection component to rotate, the controller can obtain the displacement of the piston through the cooperation of the first detection component and the second detection component.

[0016] Preferably, the first detection component is a detection chip, and the second detection component is a magnet.

[0017] Preferably, the first detection component is arranged on the control board; a through hole is provided on the housing, and the second detection component is arranged opposite to the first detection component through the through hole.

[0018] Preferably, an oil pot is integrally installed on the brake cylinder, and the oil pot is communicated with the brake cylinder.

[0019] Preferably, the brake cylinder and the motor are connected by fixing bolts.

[0020] Preferably, a sealing member is arranged between the oil passing port of the oil pot and the oil passing port of the brake cylinder, and the sealing member can be respectively clamped and matched with the oil passing port of the oil pot and the oil passing port of the brake cylinder.

[0021] The utility model has at least the following beneficial effects:

[0022] In this application, the original brake cylinder with a brake pedal is improved. By canceling the brake pedal and arranging a controller and a driving component capable of driving the piston to move at the brake cylinder, the brake cylinder can be changed from the original mechanical brake to an electric signal brake. On the basis of ensuring the function of the vehicle wheel end by-wire pressure building, the number of parts of the by-wire pressure building unit can be preferably reduced, and the overall structure is simpler and more reliable, and the cost is lower. At the same time, since the brake pedal is canceled and the driving component is controlled by the controller in the form of an electric signal to drive the piston to move, the brake cylinder in this application can be arbitrarily arranged according to the vehicle space, so that it will not be affected by the vehicle front cabin space and the wheel end space at the rear end of the brake pedal, and is convenient to be applied to more different vehicle models. Description of the Drawings

[0023] Figure 1 shows a schematic diagram of a wire-controlled pressure building unit in some embodiments of the present application;

[0024] Figure 2 shows a first cross-sectional view of a wire-controlled pressure building unit in some embodiments of the present application;

[0025] Figure 3 shows a first exploded view of a wire-controlled pressure building unit in some embodiments of the present application;

[0026] Figure 4 shows a second exploded view of a wire-controlled pressure building unit in some embodiments of the present application;

[0027] Figure 5 shows a second cross-sectional view of a wire-controlled pressure building unit in some embodiments of the present application.

[0028] The names of the parts referred to by each numerical label in the drawings are as follows:

[0029] 100, controller; 110, control board; 120, housing; 121, through hole; 130, cover plate; 140, first detection member; 210, motor; 211, housing; 211a, connecting ear; 212, front end cover; 213, stator; 214, rotor; 215, bearing; 220, lead screw; 221, mounting hole; 230, nut; 240, second detection member; 300, brake cylinder; 310, piston; 320, fixed seat; 330, second oil passage; 340, second connecting plate; 400, oil pot; 410, first oil passage; 420, first connecting plate; 500, fixing bolt; 600, seal; 700, fastening bolt. Detailed implementation manners

[0030] To further understand the content of the present invention, the present invention will be described in detail with reference to the drawings and embodiments. It should be understood that the embodiments are only for explaining the present invention rather than limiting it.

[0031] Currently, there are three schemes for the layout of existing automotive braking systems: one-box, two-box, and EMB. For the one-box or two-box scheme, as a pressure building unit, the braking pressure is transmitted to the four wheels through brake pipes, and various solenoid valves and coils are integrated on it. Its scheme has a complex structure, high cost, and large size, and can only be arranged at the rear end of the brake pedal, which is not conducive to the space layout in the front cabin of the whole vehicle. For the EMB scheme, its structure is that there are four driving motors, four sets of transmission mechanisms, and four sets of piston structures at the four wheel ends to provide braking force for the wheels. The cost is relatively high, and the space requirements for the wheel ends are extremely high, and it cannot be applied to models with relatively small wheel end sizes.

[0032] In view of the above problems, in combination withFigures 1-5 As shown, in this embodiment, a wire-controlled pressure building unit is provided, which includes a controller 100, a driving component, and a brake cylinder 300. Among them, a piston 310 that can reciprocate along the axial direction of the brake cylinder 300 is arranged in the brake cylinder 300. Further, the output end of the driving component is connected to the piston 310, and the controller 100 is electrically connected to the driving component. The controller 100 can control the operation of the driving component so that the driving component can drive the piston 310, enabling the piston 310 to reciprocate in the pressure building cylinder to achieve the pressure building function and pressure relief function of the pressure building cylinder.

[0033] When the vehicle generates a braking demand, the vehicle control system can transmit the braking demand to the controller 100 in the form of an electrical signal, enabling the controller 100 to drive the piston 310 correspondingly by controlling the driving component, thereby achieving the pressure building function and pressure relief function of the pressure building cylinder.

[0034] It should be noted that in this embodiment, the original brake cylinder 300 with a brake pedal is improved. By canceling the brake pedal and arranging the controller 100 and the driving component capable of driving the piston 310 to move at the brake cylinder 300, the brake cylinder 300 can be changed from the original mechanical braking to electrical signal braking. On the basis of ensuring the realization of the function of wire-controlled pressure building at the wheel end of the whole vehicle, it can preferably reduce the number of parts of the wire-controlled pressure building unit, and the overall structure is simpler and more reliable, with a lower cost. At the same time, since the brake pedal is canceled and the piston 310 is driven by controlling the driving component in the form of an electrical signal through the controller 100, the brake cylinder 300 in this embodiment can be arbitrarily arranged according to the space of the whole vehicle, so that it will not be affected by the front cabin space and the wheel end space at the rear end of the brake pedal, and is convenient to be applied to more different vehicle models.

[0035] In some embodiments, the driving assembly includes a motor 210, a lead screw 220, and a lead nut 230. Among them, the motor 210 is composed of a housing 211, a front end cover 212, a stator 213, and a rotor 214. The rotor 214 is rotatably mounted in the housing 211 through a bearing 215. The stator 213 is fixedly mounted in the housing 211 and sleeved outside the rotor 214. The front end cover 212 can be fixedly covered on the housing 211. When the motor 210 is powered on, the rotor 214 can rotate around its axis. Further, the lead screw 220 and the lead nut 230 are also disposed in the housing 211 of the motor 210. One end of the lead screw 220 is fixedly connected to the rotor 214, and the other end of the lead screw 220 extends in the direction of the piston 310. The lead nut 230 is sleeved on the lead screw 220, and a limiting structure, such as a flat key and a groove, is provided between the lead nut 230 and the front end cover 212. This limiting structure can limit the circumferential rotation of the lead nut 230, so that when the lead screw 220 rotates following the rotor 214, the lead nut 230 can reciprocate along the axial direction of the lead screw 220. Further, the lead nut 230 is connected to the piston 310. When the lead nut 230 reciprocates along the axial direction of the lead screw 220, the lead nut 230 can synchronously drive the piston 310 to perform corresponding movements, so that the piston 310 can reciprocate in the brake cylinder 300 to realize the pressure building function and pressure relief function of the brake cylinder 300.

[0036] It can be understood that when the vehicle has a braking requirement, the vehicle control system can transmit the braking requirement to the controller 100. The controller 100 can control the motor 210 to work in the form of an electrical signal, so that the rotor 214 rotates under the action of the stator 213, thereby driving the lead screw 220 to rotate, and further realizing that the lead nut 230 on the lead screw 220 can drive the piston 310 to reciprocate in the brake cylinder 300.

[0037] In some embodiments, the controller 100 and the brake cylinder 300 are respectively disposed on both sides of the driving assembly. Specifically, the controller 100 and the brake cylinder 300 are respectively disposed on both sides of the motor 210. The driving assembly directly connects the piston 310 through the lead nut 230 provided in the motor 210 as the output end, which can preferably realize the driving of the piston 310 by the driving assembly.

[0038] The controller 100 and the brake cylinder 300 are respectively disposed on both sides of the motor 210. Among them, the controller 100 is disposed on one side of the motor 210 close to one end of the lead screw 220, which can realize the reasonable layout of each component, make the overall structure simple and reliable, have low production and disassembly costs, and occupy less space, and is convenient to be arbitrarily arranged according to the vehicle space, so that it will not be affected by the vehicle front cabin space behind the brake pedal and the wheel end space, and is convenient to be applied to more different vehicle models.

[0039] In some embodiments, the controller 100 specifically includes a control board 110, a housing 120, and a cover plate 130. The control board 110 is a PLC circuit board. A slot structure corresponding to the control board 110 can be provided on the housing 120 and / or the cover plate 130, so that the housing 120 and the cover plate 130 can clamp and fix the control board 110, improving the stability and reliability of the overall structure of the controller 100.

[0040] Furthermore, the entire controller 100 is fixedly connected to the motor 210 through the housing 120, and specifically, it can be realized by means such as snap connection or bolt connection. The controller 100 is electrically connected to the motor 210 in the drive assembly through the control board 110.

[0041] When the vehicle generates a braking demand, the vehicle control system transmits the braking demand to the control board 110, so that the control board 110 controls the motor 210 to work in the form of an electrical signal. Furthermore, the lead nut 230 in the motor 210 drives the piston 310 to perform corresponding movements, so as to realize the pressure building function and pressure relief function of the brake cylinder 300.

[0042] It can be understood that the housing 120 and the cover plate 130 provided outside the control board 110 can, on the basis of realizing the connection and installation between the control board 110 and the motor 210, also play a certain protective role for the control board 110, avoiding the control board 110 from being impacted or touched by the outside world, and can preferably improve the stability and reliability of the control board 110.

[0043] In some embodiments, a first detection component 140 is provided on the controller 100, and the first detection component 140 is electrically connected to the control board 110; a second detection component 240 is provided on the lead screw 220. When the vehicle generates a braking demand, the vehicle control system transmits the braking demand to the control board 110, so that the control board 110 controls the motor 210 to work. At the same time, the control board 110 also controls the first detection component 140 to start working; when the rotor 214 drives the lead screw 220 to rotate, the lead screw 220 can synchronously drive the second detection component 240 to rotate. During the process of the second detection component 240 following the rotation of the lead screw 220, the first detection component 140 can cooperate with the second detection component 240, so that the first detection component 140 can obtain the number of turns of the rotation of the lead screw 220. Furthermore, the first detection component 140 can calculate the displacement value of the movement of the piston 310 driven by the lead screw 220 through the lead nut 230. The first detection component 140 can feedback the displacement value of the piston 310 to the control board 110, so that the vehicle control system can monitor the movement of the piston 310 in real time, and can preferably improve the stability and reliability of the by-wire pressure building unit in this embodiment.

[0044] It can be understood that since the lead screw 220 is fixedly connected to the rotor 214 of the motor 210, the rotation of the lead screw 220 is synchronous with the rotation of the rotor 214. Therefore, the above-mentioned second detection member 240 can also be arranged on the rotor 214 of the motor 210, and the corresponding technical effects and advantages can also be achieved, and no special limitation is made thereto.

[0045] Furthermore, the first detection member 140 can be arranged on the control board 110, or can be arranged on the outer shell 120 or the cover plate 130, as long as it can be electrically connected to the control board 110 and can achieve the above-mentioned technical effects and advantages, and no special limitation is made herein.

[0046] In some embodiments, the first detection member 140 can be a detection chip, and the detection chip is electrically connected to the control board 110; the second detection member 240 can be a magnet. When the vehicle has a braking requirement, the vehicle control system transmits the braking requirement to the control board 110, so that the control board 110 controls the motor 210 to work. At the same time, the control board 110 also controls the detection chip to start working; when the rotor 214 drives the lead screw 220 to rotate, the lead screw 220 can synchronously drive the magnet to rotate. During the rotation of the magnet, the detection chip can detect the magnetic field angle of the magnet in real time, so that the detection chip can calculate the number of turns of the rotation of the lead screw 220 and / or the rotor 214, and further calculate the displacement value of the nut 230 driving the piston 310 to move; when the detection chip calculates the displacement value of the piston 310, it can feedback the result to the control board 110, so that the vehicle control system can monitor the by-wire pressure building unit in real time and improve the stability and reliability of the by-wire pressure building unit.

[0047] Exemplarily, an installation hole 221 is provided at one end of the lead screw 220, that is, at the end of the lead screw 220 close to the controller 100. The magnet is fixedly installed in the installation hole 221 by means of threaded connection, clamping connection, bonding or the like to achieve the fixed connection between the magnet and the lead screw 220.

[0048] In some embodiments, the first detection member 140 is arranged on the control board 110; a through hole 121 is provided on the outer shell 120.

[0049] Exemplarily, the first detecting member 140 is specifically disposed at a position on the control board 110 corresponding to the axis of the lead screw 220, and the through hole 121 is specifically disposed at a position on the housing 120 corresponding to the axis of the lead screw 220; since the second detecting member 240 is disposed at the end of one end of the lead screw 220, therefore, through the through hole 121 on the housing 120, the first detecting member 140 and the second detecting member 240 can be relatively disposed. Without an object blocking between the first detecting member 140 and the second detecting member 240, the detection of the second detecting member 240 by the first detecting member 140 can be more accurate and stable, preferably improving the stability and reliability of the wire-controlled pressure building unit.

[0050] Further, the end of the second detecting member 240 disposed on the lead screw 220 close to the control board 110 can pass through the through hole 121 on the housing 120, so that the second detecting member 240 can be closer to the first detecting member 140, and it can also make the detection of the second detecting member 240 by the first detecting member 140 more accurate and stable, preferably improving the stability and reliability of the wire-controlled pressure building unit.

[0051] In some embodiments, an oil pot 400 is integrally installed on the brake cylinder 300, and the oil pot 400 is communicated with the brake cylinder 300. It should be noted that, compared with the existing communication between the brake cylinder 300 and the oil pot 400 through a pipeline, in this embodiment, the oil pot 400 is directly integrally installed in the brake cylinder 300, which can preferably shorten the distance between the brake cylinder 300 and the oil pot 400, so that the brake cylinder 300 can more quickly realize oil delivery with the oil pot 400, preferably improving the response speed of the wire-controlled pressure building unit.

[0052] In some embodiments, the brake cylinder 300 and the motor 210 are connected by fixing bolts 500. Specifically, at least two connecting ears 211a are disposed on the circumferential side wall of the housing 211 of the motor 210, and a fixing seat 320 is disposed on the brake cylinder 300. The fixing seat 320 can be fixedly connected with at least two connecting ears 211a through the fixing bolts 500, thereby realizing the fixed connection between the brake cylinder 300 and the motor 210 and improving the stability and reliability of the overall mechanism.

[0053] In some embodiments, the oil pot 400 has at least one oil passing port communicating with the brake cylinder 300, hereinafter referred to as the first oil passing port 410; the brake cylinder 300 has at least one oil passing port communicating with the oil pot 400, hereinafter referred to as the second oil passing port 330. The integral installation of the oil pot 400 on the brake cylinder 300 is realized through the direct connection between the first oil passing port 410 and the second oil passing port 330.

[0054] Furthermore, the first oil passage port 410 and the second oil passage port 330 are connected to each other through snap connection to achieve communication therebetween. Further, a seal 600 is provided between the first oil passage port 410 and the second oil passage port 330. The seal 600 can preferably prevent oil leakage after the first oil passage port 410 and the second oil passage port 330 are installed, thereby improving safety.

[0055] Specifically, the first oil passage port 410 and the second oil passage port 330 can be respectively snap-connected to the seal 600, so that on the one hand, the installation connection between the first oil passage port 410 and the second oil passage port 330 can be achieved through the seal 600, and on the other hand, the seal between the first oil passage port 410 and the second oil passage port 330 can be achieved. Specifically, during the installation process, the seal 600 can be first snap-connected to the first oil passage port 410, and then the first oil passage port 410 can be snap-connected to the second oil passage port 330 through the seal 600, thereby achieving the installation connection between the first oil passage port 410 and the second oil passage port 330, and realizing the integrated installation of the oil pot 400 on the brake cylinder 300, so that the oil pot 400 and the brake cylinder 300 can form an integral structure, making the structure of the wire-controlled pressure building unit more stable and reliable, and the response faster.

[0056] In some embodiments, a first connecting plate 420 is provided on the oil pot 400, and a second connecting plate 340 is provided on the brake cylinder 300. The first connecting plate 420 and the second connecting plate 340 can be fixedly connected through a fastening bolt 700.

[0057] It can be understood that after the first oil passage port 410 and the second oil passage port 330 are installed and connected, and then the first connecting plate 420 and the second connecting plate 340 are fixedly connected through the fastening bolt 700, on the one hand, the connection stability between the oil pot 400 and the brake cylinder 300 can be improved, on the other hand, the connection and installation stability between the first oil passage port 410 and the second oil passage port 330 can be improved, and the sealing effect of the seal 600 can be improved.

[0058] In summary, the above are only the preferred embodiments of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope covered by the patent of the present invention.

Claims

1. A line-controlled voltage-building unit, characterized in that: It includes a controller, a driving assembly and a brake cylinder with a piston; the output end of the driving assembly is connected to the piston; The controller is electrically connected to the driving assembly to control the driving assembly to drive the piston to reciprocate in the pressure-building chamber in the brake cylinder.

2. The line-controlled voltage building unit according to claim 1, characterized in that: The driving assembly comprises a motor, a screw rod and a screw nut; The screw rod is fixedly connected to the rotor of the motor; The nut is sleeved on the screw rod and connected to the piston; The controller is electrically connected to the motor to drive the screw rod to rotate through the motor, so that the nut drives the piston to reciprocate in the brake cylinder.

3. The line-controlled voltage building unit according to claim 2, characterized in that: The controller and the brake cylinder are respectively arranged on both sides of the motor.

4. The line-controlled voltage building unit according to claim 3, characterized in that: The controller includes a control board, and a shell and a cover plate capable of clamping and fixing the control board; the controller is electrically connected to the motor through the control board, and is fixedly connected to the motor through the shell.

5. The line-controlled voltage building unit according to claim 4, characterized in that: The controller is provided with a first detection member electrically connected to the control board, and the rotor and / or the lead screw is provided with a second detection member; When the rotor and / or the screw rod drives the second detection member to rotate, the controller can obtain the displacement of the piston through the cooperation between the first detection member and the second detection member.

6. The line-controlled voltage-building unit according to claim 5, characterized in that: The first detection component is a detection chip, and the second detection component is a magnet.

7. The line-controlled voltage building unit according to claim 5, characterized in that: The first detection member is arranged on the control board; a through hole is arranged on the housing, and the second detection member is arranged opposite to the first detection member through the through hole.

8. The line-controlled voltage building unit according to any one of claims 1 to 7, characterized in that: An oil pot is integrally mounted on the brake cylinder, and the oil pot is communicated with the brake cylinder.

9. The line-controlled voltage building unit according to any one of claims 2 to 7, characterized in that: The brake cylinder is connected to the motor via fixing bolts.

10. The line-controlled voltage building unit according to claim 8, characterized in that: A sealing member is provided between the oil outlet of the oil pot and the oil outlet of the brake cylinder, and the sealing member can be snap-fitted with the oil outlet of the oil pot and the oil outlet of the brake cylinder respectively.

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