CNC hydraulic brake device

Abstract

The present invention relates to a numerical control hydraulic brake device, including a numerical control system, a hydraulic pump, a one-way oil outlet valve, a first conversion valve, a numerical control brake master cylinder oil distribution valve and a high-pressure oil storage tank; the numerical control brake master cylinder oil distribution valve includes a master cylinder and sub-cylinders corresponding to the number of vehicle brake sub-cylinders; the sub-cylinder includes an oil distribution cylinder and a piston; the master cylinder includes a valve cylinder, a valve core and a valve core pull plate for connecting the brake cable; the valve core pull plate drives the valve core to rotate to a brake actuation state, and the valve core oil inlet is connected to the valve cylinder oil inlet; the valve core pull plate drives the valve core to rotate to a brake release state, and the valve core oil inlet is connected to the valve cylinder oil return port. The numerical control hydraulic brake device provided by the present invention improves the brake device, especially redesigns the numerical control brake master cylinder oil distribution valve structure, so that the numerical control hydraulic brake device can completely replace the existing vehicle brake device and improve the safety factor of driving safety and transportation safety.

Description

Technical Field

[0001] The present invention belongs to the technical field of brake systems, and in particular, relates to a numerically controlled hydraulic brake device. Background Art

[0002] As a means of transportation and cargo transport, cars have become more and more widely integrated into people's daily lives; at the same time, car brakes are indispensable as a guarantee for safe driving. However, when the car brake device fails, there are no other safeguards to deal with the situation, which will seriously affect the life safety of people on the car and the safety of cargo transportation.

[0003] In response to the above situation, the applicant of this application invented "a kind of automobile brake hydraulic auxiliary device and oil distribution valve" in the Chinese patent application number CN201610270429.1. As an auxiliary device, it needs to be used in conjunction with the existing automobile brake device, and cannot completely replace the existing automobile brake device for use alone. Summary of the invention

[0004] In order to solve the above problems, the present application provides a CNC hydraulic brake device. The applicant has improved the technology of his prior application, especially redesigned the CNC brake master cylinder oil distribution valve, so that it can completely replace the existing automobile brake device and be used alone, thereby improving the safety factor of vehicle driving safety and transportation safety.

[0005] The technical solution adopted by the present invention is:

[0006] A numerical control hydraulic brake device, comprising a numerical control system, a hydraulic pump, a one-way oil outlet valve, a first conversion valve, a numerical control brake master cylinder oil distributor valve and a high-pressure oil storage tank; the numerical control brake master cylinder oil distributor valve comprises a master cylinder and slave cylinders corresponding to the number of vehicle brake slave cylinders; the slave cylinder comprises an oil distributor cylinder and a piston; the piston is arranged in the oil distributor cylinder and cooperates with the inner side wall of the oil distributor cylinder in a sliding and sealing manner, and the piston separates the oil distributor cylinder into a first chamber and a second chamber; the first chamber is provided with an oil distributor cylinder oil inlet, and the second chamber is provided with an oil distributor cylinder oil outlet;

[0007] The master cylinder comprises a valve cylinder, a valve core and a valve core pull plate for connecting the brake cable; the valve core is arranged in the valve cylinder and cooperates with the inner side wall of the valve cylinder for rotation and sealing; the side wall of the valve cylinder is respectively provided with a valve cylinder oil inlet and a valve cylinder oil return port along the same circumferential direction, and one end face of the valve cylinder is provided with a valve cylinder oil outlet; the side wall of the valve core is provided with a valve core oil inlet, and the center of one end face of the valve core is provided with a valve core oil outlet connected with the valve core oil inlet; the valve core oil outlet is located at the valve cylinder oil outlet; the valve core pull plate is located outside the valve cylinder and is connected with the valve core transmission to control the rotation of the valve core; the valve core pull plate drives the valve core to rotate to the brake braking state, and the valve core oil inlet is connected with the valve cylinder oil inlet; the valve core pull plate drives the valve core to rotate to the brake release state, and the valve core oil inlet is connected with the valve cylinder oil return port;

[0008] The oil outlet of the first conversion valve is connected to the oil inlet of the one-way oil outlet valve, the oil inlet of the first conversion valve is connected to the hydraulic oil tank through the hydraulic pump, and the oil return port of the first conversion valve is connected to the hydraulic oil tank; the oil outlet of the one-way oil outlet valve, the oil storage port of the high-pressure oil storage barrel, and the oil inlet of the valve cylinder are connected to each other; the valve core oil outlet is respectively connected to the oil inlet of the oil distribution barrel of each of the sub-pumps, and the oil distribution barrel oil outlet is connected to the corresponding brake sub-pump; the valve cylinder oil return port is connected to the hydraulic oil tank through an oil return pipe; a first pressure sensor is provided at the oil storage port of the high-pressure oil storage barrel, and the first pressure sensor is electrically connected to the numerical control system.

[0009] Furthermore, a second pressure sensor is provided at the oil outlet of the oil separator; the second pressure sensor is electrically connected to the numerical control system, and the numerical control system is electrically connected to a slave pump fault alarm device; the numerical control system controls the slave pump fault alarm device to give an alarm indication according to the monitoring signal of the second pressure sensor.

[0010] Further, the valve cylinder is provided with a stepped hole with openings at both ends along the central axis direction; the valve core comprises a core body, a pressure bearing and a first retaining spring; the shape of the core body is a cylinder matching the large-diameter section of the stepped hole; the two end surfaces of the core body are respectively provided with a rotating shaft and a frustum, the frustum surface is provided with a flat key, and the flat key is provided with a screw; the rotating shaft matches the small-diameter section of the stepped hole, the oil inlet of the valve core is provided on the side wall of the core body, and the oil outlet of the valve core is provided on an end surface of the rotating shaft away from the core body; A keyway matching the flat key is provided on one side of the valve core pull plate facing the flat key, and a screw through hole matching the screw is provided in the keyway; the screw passes through the valve core pull plate through the screw through hole and is provided with a fastening nut; the first retaining spring is clamped in the retaining groove at the large end of the stepped hole; the radius of the truncated cone is smaller than the radius of the core body, the pressure bearing is sleeved on the outside of the truncated cone, and the two end faces of the pressure bearing respectively resist the first retaining spring and the end face of the core body adjacent to the pressure bearing.

[0011] Furthermore, a drain port is provided at the side wall of the valve cylinder corresponding to the shoulder surface of the stepped hole, and the drain port is connected to the oil return port of the valve cylinder through a drain pipe.

[0012] Furthermore, the slave cylinder includes several pairs of front wheel slave cylinders, and the branch oil channels connected to the valve core oil outlet and the oil inlet of the oil distributor cylinder of each front wheel slave cylinder are respectively provided with front wheel slave cylinder control valves; the front wheel slave cylinder control valve is electrically connected to the numerical control system, and the numerical control system controls the opening and closing of the front wheel slave cylinder control valve.

[0013] Furthermore, the CNC brake master cylinder oil distribution valve also includes a base plate; the valve cylinder and the oil distribution cylinder are both arranged on the base plate, and a CNC brake master cylinder oil distribution valve oil channel is arranged inside the base plate; the valve core oil outlet is connected to the oil inlet of the oil distribution cylinder of each of the sub-cylinders through the CNC brake master cylinder oil distribution valve oil channel.

[0014] Further, the high-pressure oil storage barrel includes a cylinder, a first baffle, a first spring and a second baffle; a cavity is provided inside the cylinder; the first baffle and the second baffle are provided in the cavity and are respectively slidably sealed with the inner side wall of the cylinder; the two ends of the first spring are respectively connected with the first baffle and the second baffle, and the expansion and contraction direction of the first spring is consistent with the sliding direction of the first baffle and the second baffle; an oil storage pipe and a pressure regulating pipe are respectively provided at the two ends of the cylinder, and a first hydraulic rod and a second hydraulic rod connected with the first baffle and the second baffle are respectively provided in the oil storage pipe and the pressure regulating pipe; the diameter of the oil storage pipe is smaller than the diameter of the pressure regulating pipe;

[0015] The CNC hydraulic brake device further comprises a second conversion valve; the oil inlet of the second conversion valve is connected to the oil outlet of the one-way oil outlet valve; the oil outlet of the second conversion valve is connected to the pressure regulating pipe; the oil return port of the second conversion valve is connected to the oil return pipe; the second conversion valve is electrically connected to the CNC system, and the CNC system controls the switching opening and closing of the second conversion valve;

[0016] The cylinder is provided with a first controller and a second controller, the touch end of the first controller and the touch end of the second controller are both located inside the cylinder, and are respectively located at positions corresponding to the maximum limited stroke and the minimum limited stroke of the first baffle; the action ends of the first controller and the second controller are both located outside the cylinder, and are respectively connected to the switch control of the first conversion valve and the valve core pull plate through pull wires.

[0017] Furthermore, the brake cylinder includes a cylinder body, a push rod piston, a push rod, a spring baffle, a second spring, a fixed plate and a second retaining spring; one end of the cylinder body is provided with an opening, and the other end of the cylinder body is provided with a sub-pump oil inlet connected to the oil outlet of the oil distributor cylinder; the push rod piston sliding seal is arranged in the cylinder body, and the side of the push rod piston facing away from the opening forms a hydraulic chamber with the cylinder body, and the sub-pump oil inlet is connected with the hydraulic chamber; one end of the push rod is arranged on the side of the push rod piston facing the opening, and the other end of the push rod passes through the second spring and the fixed plate in sequence and is provided with a connecting seat for connecting the brake pad; the spring baffle is arranged on the push rod; the extension of the opening is provided with an extension part, and the extension part is connected to the fixed plate by bolts, and the two ends of the second spring respectively abut against the spring baffle and the fixed plate, and the size of the spring baffle is larger than the opening and abuts against the opening; the second retaining spring is arranged at the groove in the opening.

[0018] Furthermore, the oil inlet of the slave pump is provided with an air bolt, and the air bolt is threadedly connected to the oil inlet of the slave pump; the air bolt is provided with a through hole along the axial direction, and air bolt oil inlets connected to the through hole are provided on opposite sides of the screw rod of the air bolt, and the oil inlet is connected to the oil inlet of the slave pump through the through hole; a pin bolt is provided on the top surface of the nut of the air bolt, and the nut of the pin bolt is provided with a blind hole along the central axis, and air holes connected to the blind hole are provided on opposite sides of the screw rod of the pin bolt, and the air hole and the blind hole form a T-shaped exhaust hole; the rod of the pin bolt matches the through hole.

[0019] The present invention also provides a numerically controlled brake master cylinder oil distributor valve, which includes the numerically controlled brake master cylinder oil distributor valve including a master cylinder and slave cylinders corresponding to the number of brake slave cylinders of the vehicle; the slave cylinders include an oil distributor cylinder and a piston; the piston is arranged in the oil distributor cylinder and cooperates with the inner side wall of the oil distributor cylinder in a sliding and sealing manner, and the piston separates the oil distributor cylinder into a first chamber and a second chamber; the first chamber is provided with an oil distributor cylinder oil inlet, and the second chamber is provided with an oil distributor cylinder oil outlet;

[0020] The master cylinder comprises a valve cylinder, a valve core and a valve core pull plate for connecting the brake cable; the valve core is arranged in the valve cylinder and cooperates with the inner side wall of the valve cylinder for rotation and sealing; the side wall of the valve cylinder is respectively provided with a valve cylinder oil inlet and a valve cylinder oil return port along the same circumferential direction, and one end face of the valve cylinder is provided with a valve cylinder oil outlet; the side wall of the valve core is provided with a valve core oil inlet, and a valve core oil outlet connected with the valve core oil inlet is provided at the center position of one end face of the valve core; the valve core oil outlet is located at the valve cylinder oil outlet; the valve core pull plate is located outside the valve cylinder and is connected with the valve core transmission to control the rotation of the valve core; the valve core pull plate drives the valve core to rotate to the brake braking state, and the valve core oil inlet is connected with the valve cylinder oil inlet; the valve core pull plate drives the valve core to rotate to the brake release state, and the valve core oil inlet is connected with the valve cylinder oil return port; the valve core oil outlet is respectively connected with the oil inlet of the oil sub-cylinder of each of the sub-pumps.

[0021] Beneficial effects of the present invention:

[0022] The present invention provides a numerically controlled hydraulic brake device, which improves the brake device, especially redesigns the structure of the numerically controlled brake master cylinder oil distribution valve, so that the numerically controlled hydraulic brake device can completely replace the existing vehicle brake device and improve the safety factor of driving safety and transportation safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 is a structural schematic diagram of the numerically controlled brake master cylinder oil distribution valve described in the embodiment;

[0025] Figure 2 yes Figure 1 A front view of

[0026] Figure 3 is a structural schematic diagram of the valve core pull plate described in the embodiment;

[0027] Figure 4 is a schematic structural diagram of the valve core described in the embodiment;

[0028] Figure 5 is a schematic diagram of a cross-sectional view of the valve cartridge described in the embodiment;

[0029] Figure 6 Schematic diagram of the cross-sectional structure of the oil separator described in the embodiment;

[0030] Figure 7 Schematic diagram of the oil circuit structure of the digitally controlled brake master cylinder oil distribution valve of the two-bridge vehicle described in the embodiment;

[0031] Figure 8 is a schematic structural diagram of the high-pressure oil storage barrel described in the embodiment;

[0032] Fig. 9 yes Figure 8 A top view of

[0033] Fig.10 yes Figure 8 Left view of

[0034] Fig.11 is a schematic cross-sectional view of the high-pressure oil storage barrel described in the embodiment;

[0035] Fig.12 is a schematic diagram of the structure of the brake wheel cylinder described in the embodiment;

[0036] Fig.13 is a schematic cross-sectional structural diagram of the cylinder body described in the embodiment;

[0037] Fig.14 is a schematic structural diagram of the fixing plate described in the embodiment;

[0038] Fig.15 is a schematic diagram of the exploded structure of the air bolt described in the embodiment;

[0039] Fig.16 is a schematic cross-sectional structural diagram of the air bolt described in the embodiment;

[0040] Fig.17 is a structural block diagram of the numerically controlled hydraulic brake device described in the embodiment;

[0041] Fig.18 It is a schematic diagram of other oil circuit structures of the digitally controlled brake master cylinder oil distribution valve of the two-bridge vehicle described in the embodiment;

[0042] Fig.19 It is a schematic diagram of the oil circuit structure of the digital control brake master cylinder oil distribution valve of the three-axle vehicle with two front axles and one rear axle as described in the embodiment;

[0043] Fig. 20 It is a schematic diagram of the oil circuit structure of the digital control brake master cylinder oil distribution valve of the three-axle vehicle with one bridge in front and two bridges in the rear described in the embodiment;

[0044] Fig.21 It is a schematic diagram of the oil circuit structure of the digitally controlled brake master cylinder oil distribution valve of the four-axle vehicle with two front and two rear axles described in the embodiment;

[0045] Fig. 22 Schematic diagram of the oil circuit structure of the digitally controlled brake master cylinder oil distribution valve of the three-axle trailer described in the embodiment;

[0046] Fig.23 is a schematic cross-sectional view of the first oil storage barrel and the second oil storage barrel described in the embodiment;

[0047] Fig.24 It is a schematic cross-sectional structural diagram of the pedal slave pump described in the embodiment.

[0048] The numbers in the figure are: master pump 101, valve cylinder oil return port 102, drain port 103, valve cylinder oil inlet 104, valve core pull plate 105, second pressure sensor 106, oil distribution cylinder oil outlet 107, sub-pump 108, bottom plate 109, core 110, rotating shaft 111, valve core oil outlet 112, valve core oil inlet 113, round table 114, flat key 115, screw 116, core body sealing ring installation groove 117, core body sealing ring 118, Pressure bearing 119, first retaining spring 120, piston 121, first chamber 122, second chamber 123, oil distributor oil inlet 124, piston seal 125, brake cable adjustment hole 126, keyway 127, screw through hole 128, cylinder 129, cylinder fixing seat 130, oil storage pipe 131, pressure regulating pipe 132, first baffle 133, first spring 134, second baffle 135, first hydraulic rod 136, second hydraulic Rod 137, cylinder body 138, extension 139, fixing plate 140, air bolt 141, push rod 142, spring baffle 143, second spring 144, connecting seat 145, push rod piston 146, push rod piston sealing ring 147, hydraulic chamber 148, slave pump oil inlet 149, second retaining ring 150, air bolt oil inlet 151, ejector bolt 152, blind hole 153, air hole 154, through hole 155, sealing gasket 15 6. Clamping foot 157, bolt hole 158, front wheel slave cylinder 159, rear wheel slave cylinder 160, front wheel slave cylinder control valve 161, CNC brake master cylinder oil distribution valve oil channel 162, tractor 163, trailer 164, trailer oil distribution valve main oil channel 165, trailer oil storage barrel 166, high-pressure oil storage barrel control valve 167, high-pressure oil storage barrel 168, trailer branch oil channel oil storage barrel 169, pedal slave cylinder 170, third spring 171, main control valve 172. DETAILED DESCRIPTION

[0049] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0050] Example 1

[0051] This embodiment provides a numerical control hydraulic brake device, which includes: a numerical control system, a hydraulic pump, an oil pipeline, a one-way oil outlet valve, a first conversion valve, a numerical control brake master cylinder oil distribution valve and a high-pressure oil storage tank; Figure 1-Figure 6 As shown, the numerical control brake master cylinder oil distribution valve includes a master cylinder and sub-cylinders corresponding to the number of vehicle brake sub-cylinders; the sub-cylinder includes an oil distribution cylinder and a piston; the piston is arranged in the oil distribution cylinder and slides and seals with the inner side wall of the oil distribution cylinder, and the piston separates the oil distribution cylinder into a first chamber and a second chamber; the first chamber is provided with an oil distribution cylinder oil inlet, and the second chamber is provided with an oil distribution cylinder oil outlet. Preferably, a piston seal ring installation groove is circumferentially provided near both ends of the piston, and the piston seal ring is placed in the piston seal ring installation groove, so as to improve the sealing cooperation between the piston and the inner side wall of the oil distribution cylinder.

[0052] The master cylinder includes a valve cylinder, a valve core and a valve core pull plate for connecting the brake cable; the valve core is arranged in the valve cylinder and cooperates with the inner side wall of the valve cylinder for rotation and sealing; the side wall of the valve cylinder is respectively provided with a valve cylinder oil inlet and a valve cylinder oil return port along the same circumferential direction, and one end face of the valve cylinder is provided with a valve cylinder oil outlet; the side wall of the valve core is provided with a valve core oil inlet, and a valve core oil outlet connected with the valve core oil inlet is provided at the center position of one end face of the valve core; the valve core oil outlet is located at the valve core oil outlet; the valve core pull plate is located outside the valve cylinder and is connected to the valve core transmission to control the rotation of the valve core; the valve core pull plate drives the valve core to rotate to the brake braking state, and the valve core oil inlet is connected to the valve cylinder oil inlet; the valve core pull plate drives the valve core to rotate to the brake release state, and the valve core oil inlet is connected to the valve cylinder oil return port;

[0053] The oil outlet of the first conversion valve is connected to the oil inlet of the one-way oil outlet valve, the oil inlet of the first conversion valve is connected to the hydraulic oil tank through the hydraulic pump, and the oil return port of the first conversion valve is connected to the hydraulic oil tank; the oil outlet of the one-way oil outlet valve, the oil storage port of the high-pressure oil storage barrel, and the oil inlet of the valve cylinder are connected to each other; the oil outlet of the valve core is respectively connected to the oil inlet of the oil storage barrel of each sub-pump, and the oil outlet of the oil storage barrel is connected to the corresponding brake sub-pump; the oil return port of the valve cylinder is connected to the hydraulic oil tank through the oil return pipe; a first pressure sensor is provided at the oil storage port of the high-pressure oil storage barrel, and the first pressure sensor is electrically connected to the numerical control system, and the pressure at the oil storage port of the high-pressure oil storage barrel can be monitored by the first pressure sensor and the numerical control system.

[0054] The CNC hydraulic brake device based on the above structure is installed and fixed on the vehicle during use, and the valve core pull plate is connected to the brake cable of the vehicle's brake pedal. At the same time, the valve core pull plate is connected to a reset mechanism such as a reset spring provided on the vehicle.

[0055] When the brake is in the braking state, the brake cable pulls the valve core pull plate to rotate and drives the valve core of the master pump of the CNC brake master cylinder oil distribution valve to rotate through the valve core pull plate, so that the valve core oil inlet is connected with the valve cylinder oil inlet and staggered with the valve cylinder oil return port, so that the hydraulic oil flows into the brake sub-cylinder through the valve cylinder oil inlet through the valve core oil inlet and the valve core oil outlet in sequence, so that the brake sub-cylinder pushes the brake pad to realize braking; at the same time, in the process of the brake cable pulling the valve core pull plate, the valve core pull plate causes the reset mechanism such as the reset spring to undergo elastic deformation to generate a restoring force.

[0056] When the brake is in the released state, the brake pedal is reset and the valve core pull plate is reset under the restoring force generated by the reset mechanism such as the reset spring, so that the valve core oil inlet and the valve cylinder oil inlet are staggered and connected with the valve cylinder oil return port, so that the hydraulic oil in the brake cylinder flows into the hydraulic oil tank through the valve core oil outlet, the valve core oil inlet, the valve cylinder oil return port and the return oil pipe in sequence, so that the push rod of the brake cylinder releases the brake pads to realize normal driving of the vehicle.

[0057] Therefore, the numerically controlled hydraulic brake device provided in this embodiment can completely replace the existing vehicle brake device to achieve vehicle braking and normal driving; and the hydraulic oil in the hydraulic oil tank is pumped to the oil inlet of the valve cylinder and the high-pressure oil storage barrel through the hydraulic pump through the one-way oil outlet valve at the same time, so that the hydraulic oil and pressure of the high-pressure oil storage barrel are pre-stored while the braking is completed. In this way, when the hydraulic pump fails, the hydraulic oil and pressure pre-stored in the high-pressure oil storage barrel can still control the brake cylinder to complete the braking during the braking process, thereby improving the safety factor of driving safety and transportation safety.

[0058] Specifically, the valve cylinder is provided with a stepped hole with openings at both ends along the central axis direction; the valve core includes a core body, a pressure bearing and a first retaining spring; the shape of the core body is cylindrical matching the large-diameter section of the stepped hole; the two end surfaces of the core body are respectively provided with a rotating shaft and a frustum, the frustum of the frustum is provided with a flat key, and the flat key is provided with a screw; the rotating shaft matches the small-diameter section of the stepped hole, the oil inlet of the valve core is provided on the side wall of the core body, and the oil outlet of the valve core is provided on an end surface of the rotating shaft away from the core body; a keyway matching the flat key is provided on a side of the valve core pull plate facing the flat key, and a screw through hole matching the screw is provided in the keyway; the screw passes through the valve core pull plate through the screw through hole and is provided with a fastening nut; the first retaining spring is clamped in the clamping groove at the large end of the stepped hole; the radius of the frustum is smaller than the radius of the core body, the pressure bearing is sleeved on the outside of the frustum, and the two end surfaces of the pressure bearing respectively resist the first retaining spring and the end surface of the core body adjacent to the pressure bearing.

[0059] Based on the upper master pump structure, the first retaining spring is used to facilitate the assembly and limitation of the valve core and the pressure bearing, so as to prevent the valve core and the pressure bearing from sliding out from the large end of the stepped hole due to axial movement during rotation; the truncated table is used to facilitate the assembly of the pressure bearing; at the same time, the stepped hole setting of the valve barrel and the rotating shaft and screw setting of the valve core are conducive to improving the stability of the valve core rotation; the shape of the flat key can be set to a waist shape, an ellipse or a regular polygon or an irregular polygon such as a triangle or a pentagon, so that the valve core pull plate and the valve core can rotate synchronously through the key connection; the valve core pull plate can be fixed to the large end of the stepped hole of the valve barrel by the screw, which is not only convenient for its connection and fixation, but also can play a protective role to prevent dust and other debris from entering the barrel and affecting the rotation of the valve core, and the pressure bearing can prevent the valve core from directly contacting the first retaining spring and reduce the rotational friction therebetween, which is conducive to the rotation of the valve core and the valve core pull plate.

[0060] Preferably, in order to improve the sealing cooperation effect between the core body and the valve cylinder, a core body sealing ring installation groove is circumferentially arranged at one end of the core body close to the truncated cone, and the core body sealing ring is placed in the core body sealing ring installation groove; a drain port is also arranged on the side wall of the shoulder surface of the valve cylinder corresponding to the step hole, and the drain port is connected to the oil return port of the valve cylinder through a drain pipe. Therefore, the setting of the drain port can not only enable the air in the step hole to be discharged from the drain port when the valve core is assembled, which is beneficial to the assembly of various components in the valve cylinder, but also the hydraulic oil entering between the valve core and the inner side wall of the valve cylinder can flow into the hydraulic oil tank through the drain port, the drain pipe and the oil return port of the valve cylinder.

[0061] As a preferred scheme of this embodiment, a second pressure sensor is provided at the oil outlet of the oil separator; the second pressure sensor is electrically connected to the numerical control system, and the numerical control system is electrically connected to a slave cylinder fault alarm device; the numerical control system controls the slave cylinder fault alarm device to give an alarm indication according to the monitoring signal of the second pressure sensor; wherein, when the second pressure sensor detects that the pressure at the oil outlet of the oil separator is in a pressure-free state for a long time, it indicates that a fault such as oil leakage occurs in the brake slave cylinder connected to the oil outlet of the oil separator, thereby enabling the numerical control system to control the alarm device to give an alarm indication according to the monitoring signal of the second pressure sensor; the alarm indication can remind the driver through sounds such as alarm voice, or can remind the driver through an alarm screen display.

[0062] As a setting mode of the second pressure sensor, the second pressure sensor can also be separately provided with the upper end surface of the oil separator, and the monitoring end of the second pressure sensor is placed in the second chamber. As another preferred setting mode of the second pressure sensor, the oil outlet of the oil separator is provided with a hollow bolt, and the screw of the hollow bolt is connected to the oil outlet of the oil separator through a threaded structure; the interior of the hollow bolt is a through hole provided along the axial direction and having openings at both ends; the side wall of the hollow bolt is provided with a hollow bolt oil outlet connected to the through hole, and the hollow bolt oil outlet is connected to the second chamber through the through hole; the above-mentioned second pressure sensor is sealed and arranged at the orifice of the nut of the hollow bolt located at the through hole, and the monitoring end of the second pressure sensor is located in the through hole, so as to detect the internal oil pressure thereof; the hollow bolt with this structure not only facilitates the delivery of hydraulic oil, but also enables the second pressure sensor to be arranged at the end of the hollow bolt, so that the setting space can be better utilized compared with the above-mentioned setting mode.

[0063] Preferably, two sealing gaskets are provided on the screw rod of the hollow bolt, and the two sealing gaskets are respectively located at both ends of the oil outlet of the hollow bolt, so that after the hollow bolt is tightened, the two sealing gaskets can clamp the connecting pipe connected to the oil outlet of the hollow bolt, which is beneficial to its sealing and fixation.

[0064] The valve core in this embodiment can also be designed as other structures, for example, the two end faces of the core body are respectively provided with a valve core oil outlet and a frustum; the valve core oil outlet is located at the center position of the end face of the core body and is opposite to the cylinder oil outlet; the table surface of the frustum is provided with a flat key, and the flat key is provided with a screw.

[0065] As an improved optimization of the above-mentioned preferred scheme, the CNC brake master cylinder oil distribution valve also includes a base plate; the valve cylinder and the oil distribution cylinder are both arranged on the base plate, and a CNC brake master cylinder oil distribution valve oil channel is arranged inside the base plate; the valve core oil outlet is connected with the oil distribution cylinder oil inlet of each sub-pump through the CNC brake master cylinder oil distribution valve oil channel, thereby facilitating the setting of the master cylinder and the sub-pump through the base plate, and the master cylinder and each sub-pump are connected through the CNC brake master cylinder oil distribution valve oil channel arranged in the base plate, which is convenient for the transportation and flow of hydraulic oil.

[0066] More preferably, the slave cylinder includes several pairs of front wheel slave cylinders, and the branch oil channels connecting the valve core oil outlet and the oil inlet of the oil cylinder of each front wheel slave cylinder are respectively provided with front wheel slave cylinder control valves; the front wheel slave cylinder control valves are electrically connected to the numerical control system, and the numerical control system controls the opening and closing of the front wheel slave cylinder control valves; wherein, the number of each pair of front wheel slave cylinders is 2.

[0067] like Figure 7As shown, in the present embodiment, the slave cylinders include a pair of front wheel slave cylinders and a pair of rear wheel slave cylinders, and the branch oil passages of the two front wheel slave cylinders in the pair of front wheel slave cylinders connected to the valve core oil outlet are respectively provided with a front wheel slave cylinder control valve, so that during the turning process of the vehicle, the opening and closing of the corresponding front wheel slave cylinder control valve can be controlled to control the operation of the corresponding brake slave cylinder so that it can play a role in assisting turning through the braking device.

[0068] For example, when the vehicle is turning left, the front wheel cylinder control valve for the right front brake cylinder can be controlled to be closed, thereby blocking the branch oil circuit of the front wheel cylinder corresponding to the right front brake cylinder. In this way, when braking during a turn, the right front wheel maintains normal driving, while the other wheels are in a certain braking state, thereby causing the vehicle to deviate to the left and assisting the turn.

[0069] In the present embodiment, the oil separator cylinder comprises a cylinder body and a cylinder cover, and the cylinder body and the cylinder cover are detachably connected via a threaded structure; wherein, in order to facilitate the assembly and disassembly of the cylinder cover and the cylinder body, at least two blind holes are provided on the top surface of the cylinder cover, thereby facilitating the disassembly tool to engage the rotating cylinder cover through the blind holes, and making the arrangement of adjacent oil separator cylinders more compact and space-saving.

[0070] Example 3

[0071] like Figure 8-Figure 11 As shown, as a specific structure of the high-pressure oil storage barrel in the above embodiment, it includes a cylinder, a first baffle, a first spring and a second baffle; a cavity is arranged inside the cylinder; the first baffle and the second baffle are arranged in the cavity, and respectively cooperate with the inner wall of the cylinder for sliding sealing; the two ends of the first spring are respectively connected to the first baffle and the second baffle, and the expansion and contraction direction of the first spring is consistent with the sliding direction of the first baffle and the second baffle; the two ends of the cylinder are respectively provided with an oil storage pipe and a pressure regulating pipe, and the oil storage pipe and the pressure regulating pipe are respectively provided with a first hydraulic rod and a second hydraulic rod connected to the first baffle and the second baffle; the diameter of the oil storage pipe is smaller than the diameter of the pressure regulating pipe.

[0072] The CNC hydraulic brake device also includes a second conversion valve; the oil inlet of the second conversion valve is connected to the oil outlet of the one-way oil outlet valve; the oil outlet of the second conversion valve is connected to the pressure regulating pipe; the oil return port of the second conversion valve is connected to the oil return pipe; the second conversion valve is electrically connected to the CNC system, and the CNC system controls the conversion opening and closing of the second conversion valve.

[0073] The cylinder is provided with a first controller and a second controller, the touch end of the first controller and the touch end of the second controller are both located inside the cylinder, and are respectively located at positions corresponding to the maximum limited stroke and the minimum limited stroke of the first baffle; the action ends of the first controller and the second controller are both located outside the cylinder, and are respectively connected to the switch control and the valve core pull plate of the first conversion valve through pull wires.

[0074] Based on the above structure, the high pressure oil storage barrel, such as Fig.17 As shown, when the hydraulic oil flows into the oil storage pipe from the oil storage port of the oil storage pipe, the hydraulic oil pushes the piston of the first hydraulic rod to move along the oil storage pipe and then pushes the first baffle to move and compress the first spring through the first hydraulic rod, thereby realizing the pressure pre-storage action; when the hydraulic pump fails and causes insufficient brake pressure in the oil circuit, the first baffle moves under the action of the restoring force of the first spring and moves toward the oil storage port through the piston of the first hydraulic rod to squeeze the hydraulic oil in the oil storage pipe from the oil storage port, thereby releasing the pre-stored pressure to compensate for the brake oil pressure and ensure normal braking.

[0075] At the same time, the position of the second baffle can be adjusted by the second conversion valve, the pressure regulating pipe and the second hydraulic rod, so as to adjust the pre-stored pressure of the high-pressure oil storage barrel. When the pre-stored pressure value of the high-pressure oil storage barrel needs to be increased, the numerical control system controls to open the second conversion valve, so that the hydraulic oil delivered by the oil outlet of the one-way oil outlet valve can flow into the pressure regulating pipe through the second conversion valve while flowing into the oil storage pipe, thereby pushing the piston of the second hydraulic rod to move, and then pushing the second baffle to move and squeeze the first spring through the second hydraulic rod; wherein, since the diameter of the oil storage pipe is smaller than the diameter of the pressure regulating pipe, the oil pressure of the pressure regulating pipe is greater than the oil pressure on one side of the oil storage pipe, and there is a pressure difference to achieve adjustment, thereby increasing the pre-stored pressure value of the high-pressure oil storage barrel; when the pre-stored pressure value of the high-pressure oil storage barrel needs to be reduced, the numerical control system controls the second conversion valve, so that the pressure regulating pipe is connected with the return oil port of the second conversion valve, so that the hydraulic oil in the pressure regulating pipe flows into the hydraulic oil tank through the return oil port of the second conversion valve through the return oil pipe, so that the pressure in the pressure regulating pipe is reduced, thereby reducing the pre-stored pressure value of the high-pressure oil storage barrel, and achieving pressure relief.

[0076] In addition, the safety of the high-pressure oil storage tank can be improved by connecting the first conversion valve and the first controller through the pull wire, and connecting the valve core pull plate and the second controller through the pull wire. When the first baffle moves to the maximum stroke, it touches the touch end of the first controller, so that the action end of the first controller is activated to pull the pull wire and drive the switch of the first conversion valve to make the hydraulic oil of the hydraulic pump flow into the hydraulic oil tank through the first conversion valve, thereby avoiding the safety hazard caused by the oil volume in the oil storage pipe exceeding the maximum allowable value; when the first baffle moves to the minimum stroke, it touches the touch end of the second controller, so that the action end of the second controller is activated to pull the pull wire and drive the valve core pull plate to rotate, thereby driving the valve core oil inlet to rotate to a position connected with the valve cylinder oil inlet, so that the brake cylinder maintains the braking state, thereby avoiding the safety hazard caused by the oil volume in the oil storage pipe being too small to reach the required oil pressure for braking.

[0077] In this embodiment, as other deformation structures, the oil inlet of the second switching valve can also be connected to the hydraulic oil tank through a separately provided hydraulic pump; or, the oil inlet of the second switching valve is connected to a separately provided hydraulic oil tank through another separately provided hydraulic pump; or, the second baffle can also be connected to other existing telescopic mechanisms, such as electric telescopic rods, hydraulic telescopic rods or pneumatic telescopic rods, etc., so as to control the forward / backward movement of the second baffle through the telescopic movement of the telescopic mechanism. At the same time, as other control methods of the first switching valve, the first switching valve can be selected from existing electromagnetic switching valves and electrically connected to the numerical control system; the switching opening and closing of the first switching valve are controlled by the numerical control system.

[0078] In this embodiment, in order to facilitate the fixation of the high-pressure oil storage barrel, a fixing seat can be provided at the bottom of the barrel body; specifically, the fixing seat includes two horizontally arranged channel steels, and the cross-sectional shape of the channel steel is "U" shaped; bolt holes are provided in two sections of the bottom plate of the channel steel; grooves matching the arc surface of the barrel body are provided on the two opposite side plates of the channel steel, so as to improve the firmness of the connection between the cylinder barrel and the fixing seat. Preferably, sealing leather cups are provided on the pistons of the first hydraulic rod and the second hydraulic rod, so as to improve their sealing performance.

[0079] Embodiment 4

[0080] As Figure 12-16 shown, this embodiment provides a brake caliper, which includes a cylinder block, a push rod piston, a push rod, a spring baffle, a second spring, a fixing plate and a second snap ring; one end of the cylinder block is provided with an opening, and the other end of the cylinder block is provided with a caliper oil inlet connected to the oil outlet of the oil distribution cylinder; the push rod piston is slidably and sealingly arranged in the cylinder block, and a hydraulic chamber is formed between the side of the push rod piston away from the opening and the cylinder block, and the caliper oil inlet is communicated with the hydraulic chamber; one end of the push rod is arranged on the side of the push rod piston facing the opening, and the other end of the push rod sequentially passes through the second spring and the fixing plate and is provided with a connecting seat for connecting the brake pads; the spring baffle is arranged on the push rod; an outer extension part is arranged at the outer extension of the opening, and the outer extension part is connected to the fixing plate by bolts. The two ends of the second spring respectively abut against the spring baffle and the fixing plate, and the size of the spring baffle is larger than the opening and abuts against the opening; the second snap ring is arranged at the card slot in the opening.

[0081] Based on the brake caliper with the above structure, when braking, the hydraulic oil enters the hydraulic chamber through the caliper oil inlet and then pushes the push rod to move through the push rod piston, so that the connecting seat pushes the brake pads to realize braking, and the spring baffle moves with the push rod and compresses the second spring to generate a restoring force; when the brake is released, the spring baffle moves back under the action of the restoring force of the second spring, so that the connecting seat drives the brake pads to release the brake, and the push rod pushes the push rod piston to move and compress the hydraulic chamber, so that the hydraulic oil in the hydraulic chamber flows out from the caliper oil inlet to facilitate the next braking action.

[0082] Among them, preferably, an air bolt is provided at the oil inlet of the slave pump, and the air bolt is threadedly connected to the oil inlet of the slave pump; a through hole is provided at the air bolt along the axial direction, and air bolt oil inlets connected to the through hole are provided on opposite sides of the screw of the air bolt, and the oil inlet is connected to the oil inlet of the slave pump through the through hole; a pin bolt is provided on the top surface of the nut of the air bolt, and a blind hole is provided at the nut of the pin bolt along the center axis, and air holes connected to the blind hole are provided on opposite sides of the screw of the pin bolt, and the air hole and the blind hole form a T-shaped exhaust hole; the rod of the pin bolt matches the through hole.

[0083] Based on the air bolt with the above structure, after the oil nozzle of the connecting pipe is inserted into the oil inlet of the air bolt, the oil outlet arranged on the side of the oil nozzle is connected with the hydraulic chamber through the through hole; the ejector bolt is rotated so that the end of the ejector bolt is against the back of the oil nozzle, which is beneficial to the fixation of the oil nozzle; at the same time, during the rotation and tightening process of the ejector bolt, the air between the ejector bolt and the oil nozzle can be discharged through the exhaust hole to avoid the air pressure generated by the air therein affecting the movement of the ejector bolt, which is beneficial to the assembly operation; and the hydraulic oil penetrated into the space between the ejector bolt and the air bolt by the oil nozzle can not only play a sealing role, but also play a lubricating role to avoid wear between components.

[0084] Preferably, two sealing gaskets are provided on the screw rod of the air bolt, and the two sealing gaskets are respectively located on both sides of the oil inlet of the air bolt. After the air bolt is tightened, the two sealing gaskets clamp the connecting pipe connected to the oil inlet of the air bolt, which is conducive to its sealing and fixation.

[0085] Among them, a round table is provided on the side of the spring baffle facing the second spring, and a plurality of clamping feet are provided on the side of the fixed plate facing the second spring, and the clamping feet are evenly distributed along the circumference of the through hole of the fixed plate for the push rod to pass through, so that the second spring is easily fixed by the clamping feet and the round table; wherein the clamping foot includes a rod portion and a protrusion arranged on the side of the rod portion away from the through hole; the protrusion and the plate surface member of the fixed plate form a clamping groove for fixing and clamping the second spring.

[0086] In order to better seal the push rod piston with the inner wall of the cylinder body, push rod piston sealing ring mounting grooves are circumferentially arranged at both ends of the push rod piston, and push rod piston sealing rings are arranged in the push rod piston sealing ring mounting grooves; more preferably, a sealing leather cup is arranged on one end face of the push rod piston facing the hydraulic chamber.

[0087] In this embodiment, an air bolt oil inlet connected to the through hole may be provided only on one side of the screw rod of the air bolt; similarly, an air hole connected to the blind hole may be provided only on one side of the screw rod of the ejector bolt.

[0088] Example 5

[0089] Based on the oil distribution valve structure of the digital control brake master cylinder in the above embodiment, this embodiment can adaptively adjust the oil distribution valve and oil circuit structure of the digital control brake master cylinder according to the vehicle type, as shown in the following examples:

[0090] like Figure 7 The figure shows the oil circuit structure diagram of the CNC brake master cylinder oil distribution valve of a two-axle vehicle with one front axle and one rear axle; the sub-cylinders are divided into a pair of front wheel sub-cylinders and a pair of rear wheel sub-cylinders, and the branch oil channels connecting the two front wheel sub-cylinders with the main oil channel of the CNC brake master cylinder oil distribution valve at the oil outlet of the valve core are respectively provided with a front wheel sub-cylinder control valve.

[0091] Easily understandable, Fig.18 As shown, as a schematic diagram of other oil circuit structures of the CNC brake master cylinder oil distribution valve of a two-axle vehicle, the branch oil channels connecting the two front wheel slave cylinders with the total oil channel of the CNC brake master cylinder oil distribution valve oil channel are respectively provided with a front wheel slave cylinder control valve, and the branch oil channels connecting the two rear wheel slave cylinders with the total oil channel of the CNC brake master cylinder oil distribution valve oil channel are respectively provided with a rear wheel slave cylinder control valve.

[0092] like Fig.19 The figure shows the oil circuit structure diagram of the CNC brake master cylinder oil distribution valve of a three-axle vehicle with two front axles and one rear axle; its sub-cylinders are divided into two pairs of front wheel sub-cylinders and one pair of rear wheel sub-cylinders, and the branch oil channels corresponding to the four front wheel sub-cylinders of the four wheels of the two front axles and connected to the main oil channel of the CNC brake master cylinder oil distribution valve oil channel are respectively provided with a front wheel sub-cylinder control valve; the two rear wheel sub-cylinders corresponding to the two wheels of one rear axle are directly connected to the valve core oil outlet through the branch oil channel and the main oil channel of the CNC brake master cylinder oil distribution valve oil channel.

[0093] like Fig. 20 The figure shows the oil circuit structure diagram of the CNC brake master cylinder oil distribution valve of a three-axle vehicle with one front axle and two rear axles; its sub-cylinders are divided into a pair of front wheel sub-cylinders and two pairs of rear wheel sub-cylinders, and the branch oil channels corresponding to the two front wheel sub-cylinders of the two wheels of a front axle and connected to the main oil channel of the CNC brake master cylinder oil distribution valve oil channel are respectively provided with a front wheel sub-cylinder control valve; the four rear wheel sub-cylinders corresponding to the four wheels of the two rear axles are directly connected to the valve core oil outlet through the branch oil channel and the main oil channel of the CNC brake master cylinder oil distribution valve oil channel.

[0094] like Fig.21 As shown, it is a schematic diagram of the oil circuit structure of the CNC brake master cylinder oil distribution valve of a four-axle vehicle with two front axles and two rear axles; its slave cylinders are divided into two pairs of front wheel slave cylinders and two pairs of rear wheel slave cylinders, and the branch oil channels corresponding to the four front wheel slave cylinders of the four wheels of the two front axles and connected to the main oil channel of the CNC brake master cylinder oil distribution valve oil channel are respectively provided with a front wheel slave cylinder control valve; the four rear wheel slave cylinders corresponding to the four wheels of the two rear axles are directly connected to the valve core oil outlet through the branch oil channel and the main oil channel of the CNC brake master cylinder oil distribution valve oil channel.

[0095] like Fig. 22 The figure shows the oil circuit structure diagram of the CNC master brake cylinder oil distribution valve of the three-axle trailer; the trailer CNC master brake cylinder oil distribution valve includes three pairs of sub-cylinders corresponding to the three axles of the trailer, and six of the three pairs of sub-cylinders are connected to the main oil channel of the trailer oil distribution valve through branch oil channels; the oil inlet of the main oil channel of the trailer oil distribution valve is connected to the main oil channel of the CNC master brake cylinder oil distribution valve of the tractor, so that when the tractor brakes, the hydraulic oil can flow into the sub-cylinders of the tractor and the trailer at the same time, so as to complete the braking of the tractor and the trailer.

[0096] Preferably, a trailer oil storage barrel is provided at the oil inlet end of the main oil channel of the trailer oil dividing valve, and the main oil channel of the trailer oil dividing valve is connected to the high-pressure oil storage barrel through a high-pressure oil storage barrel control valve; at the same time, the main oil channel of the oil channel of the CNC brake master cylinder oil dividing valve of the tractor is provided with a trailer branch oil channel for connecting to the main oil channel of the trailer oil dividing valve, and the trailer branch oil channel is provided with a trailer branch oil channel oil storage barrel.

[0097] The trailer oil storage barrel and the trailer branch oil channel oil storage barrel have the same structure, wherein a piston is provided in the barrel body and is in sliding sealing cooperation with the inner wall of the barrel body, and the piston divides the cavity in the barrel into an upper sealed chamber and a lower sealed chamber which are independent of each other; the upper end face and the lower end face of the barrel body are respectively provided with an upper opening and a lower opening, the lower opening of the trailer branch oil channel oil storage barrel is connected to the trailer branch oil channel, the upper opening of the trailer branch oil channel oil storage barrel is connected to the upper opening of the trailer oil storage barrel through an oil pipe, and the lower opening of the trailer oil storage barrel is connected to the main oil channel of the trailer oil distribution valve. Preferably, the lower sealing chamber of the trailer oil storage barrel and the upper sealing chamber of the trailer branch oil channel oil storage passage are both provided with a reset spring, which is conducive to the piston returning to the initial state; when the piston of the trailer oil storage barrel moves downward, the piston compresses the reset spring in the lower sealing chamber; when the piston of the trailer branch oil channel oil storage barrel moves upward, the piston compresses the reset spring in the upper sealing chamber.

[0098] like Fig.23 As shown, in the initial state: the piston of the trailer oil storage barrel is located at the upper end surface of the barrel body, and the lower sealed chamber is filled with hydraulic oil; the piston of the trailer branch oil channel oil storage barrel is located at the lower end surface of the barrel body, and the upper sealed chamber is filled with hydraulic oil. In this way, after the trailer is separated from the tractor or the oil pipe between the trailer oil storage barrel and the trailer branch oil channel oil storage barrel is damaged or ruptured, the high-pressure oil storage barrel control valve is opened to release the pre-stored oil pressure in the high-pressure oil storage barrel, and then the corresponding brake cylinder is pushed through each cylinder of the trailer to achieve braking; at the same time, the pistons of the trailer oil storage barrel and the trailer branch oil channel oil storage barrel are restored to the initial state to prevent the hydraulic oil in the barrel from leaking.

[0099] Among them, the high-pressure oil storage tank of the trailer can adopt a high-pressure oil storage tank of an existing structure, or a high-pressure oil storage tank of other structures. For example, it includes a cylinder with a cavity inside, and a baffle is arranged in the cylinder to cooperate with the inner wall of the cylinder for sliding sealing, and the baffle divides the cavity into two independent chambers; one of the chambers is a hydraulic chamber, and the other chamber is provided with a spring; an end face of the cylinder adjacent to the hydraulic chamber is provided with an oil storage port connected to the hydraulic chamber.

[0100] The total oil passage of the oil passage of the oil distribution valve of the digital control brake master cylinder of the tractor is provided with a master control valve, and the master control valve is located downstream of the branch oil passage of the trailer and upstream of the branch oil passage of the front wheel slave cylinder, so that the opening and closing of the total oil passage of the oil distribution valve of the digital control brake master cylinder of the tractor is controlled by the opening and closing of the master control valve, and then the hydraulic oil in the total oil passage of the oil distribution valve of the digital control brake master cylinder of the tractor is controlled to flow into each slave cylinder. Preferably, the master control valve is electrically connected to the digital control system.

[0101] In the above embodiment, the numerically controlled brake master cylinder oil valve also includes a pedal cylinder; Fig.24 As shown, the pedal slave cylinder includes a cylinder, a piston and a third spring; the piston sliding seal is arranged in the cylinder, and divides the cylinder into an upper chamber and a lower chamber that are independent of each other; the third spring is arranged in the lower chamber, and the two ends of the third spring are respectively connected to the piston and the cylinder; the upper end surface and the lower end surface of the cylinder are respectively provided with an oil outlet and an oil inlet, and the oil inlet is connected to the main oil channel of the CNC brake master cylinder oil distribution valve, and the oil outlet is connected to the brake pedal hydraulic rod at the brake pedal; the telescopic end of the brake pedal hydraulic rod is connected and cooperated with the brake pedal.

[0102] Based on the pedal slave cylinder of the above structure, when the brake pedal is pressed, the hydraulic oil flows into the pedal slave cylinder while flowing into each slave cylinder, thereby pushing the piston to move upward, compressing the third spring and pressing the hydraulic oil in the upper chamber into the brake pedal hydraulic rod, generating a certain resistance so that the driver can feel the stepping feeling and avoid the feeling of stepping on empty air; after releasing the pedal, the pedal is reset under the action of the original reset mechanism, and the piston is reset under the action of the third spring to move the piston downward, so that the hydraulic oil in the lower chamber flows into the hydraulic oil tank together with the hydraulic oil of each slave cylinder.

[0103] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A numerically controlled hydraulic brake device, comprising a numerical control system, characterized in that: It also includes a hydraulic pump, a one-way oil outlet valve, a first conversion valve, a CNC brake master cylinder oil distributor valve and a high-pressure oil storage tank; the CNC brake master cylinder oil distributor valve includes a master cylinder and a slave cylinder corresponding to the number of vehicle brake slave cylinders; the slave cylinder includes an oil distributor cylinder and a piston; the piston is arranged in the oil distributor cylinder and cooperates with the inner side wall of the oil distributor cylinder in a sliding seal, and the piston separates the oil distributor cylinder into a first chamber and a second chamber; the first chamber is provided with an oil distributor cylinder oil inlet, and the second chamber is provided with an oil distributor cylinder outlet Oil port; the master pump includes a valve cylinder, a valve core and a valve core pull plate for connecting the brake cable; the valve core is arranged in the valve cylinder and cooperates with the inner side wall of the valve cylinder for rotation and sealing; the side wall of the valve cylinder is respectively provided with a valve cylinder oil inlet and a valve cylinder oil return port along the same circumferential direction, and one end face of the valve cylinder is provided with a valve cylinder oil outlet; the side wall of the valve core is provided with a valve core oil inlet, and the center of one end face of the valve core is provided with a valve core oil outlet connected with the valve core oil inlet; the valve core oil outlet is located at the valve cylinder oil outlet; The valve core pull plate is located outside the valve cylinder and is connected to the valve core transmission to control the rotation of the valve core; the valve core pull plate drives the valve core to rotate to the brake braking state, and the valve core oil inlet is connected to the valve cylinder oil inlet; the valve core pull plate drives the valve core to rotate to the brake release state, and the valve core oil inlet is connected to the valve cylinder oil return port; the oil outlet of the first conversion valve is connected to the oil inlet of the one-way oil outlet valve, and the oil inlet of the first conversion valve is connected to the hydraulic oil tank through the hydraulic pump. The oil return port of the first conversion valve is connected to the hydraulic oil tank; the oil outlet of the one-way oil outlet valve, the oil storage port of the high-pressure oil storage barrel, and the oil inlet of the valve cylinder are connected to each other; the valve core oil outlet is respectively connected to the oil inlet of the oil distribution barrel of each of the slave pumps, and the oil distribution barrel oil outlet is connected to the corresponding brake slave pump; the valve cylinder oil return port is connected to the hydraulic oil tank through an oil return pipe; a first pressure sensor is provided at the oil storage port of the high-pressure oil storage barrel, and the first pressure sensor is electrically connected to the numerical control system; The valve cylinder is provided with a stepped hole with openings at both ends along the central axis direction; the valve core comprises a core body, a pressure bearing and a first retaining spring; the shape of the core body is cylindrical and matches the large-diameter section of the stepped hole; a rotating shaft and a frustum are provided on both end surfaces of the core body, respectively, the frustum surface is provided with a flat key, and the flat key is provided with a screw; the rotating shaft matches the small-diameter section of the stepped hole, the oil inlet of the valve core is provided on the side wall of the core body, and the oil outlet of the valve core is provided on an end surface of the rotating shaft away from the core body; A keyway matching the flat key is provided on one side of the valve core pull plate facing the flat key, and a screw through hole matching the screw is provided in the keyway; the screw passes through the valve core pull plate through the screw through hole and is provided with a fastening nut; the first retaining spring is clamped in the retaining groove at the large end of the stepped hole; the radius of the truncated cone is smaller than the radius of the core body, the pressure bearing is sleeved on the outer side of the truncated cone, and the two end faces of the pressure bearing respectively abut against the first retaining spring and the end face of the core body adjacent to the pressure bearing; The slave cylinder includes several pairs of front wheel slave cylinders, and the branch oil channels connected to the valve core oil outlet and the oil inlet of the oil distributor cylinder of each front wheel slave cylinder are respectively provided with front wheel slave cylinder control valves; the front wheel slave cylinder control valves are electrically connected to the numerical control system, and the numerical control system controls the opening and closing of the front wheel slave cylinder control valves.

2. The numerically controlled hydraulic brake device according to claim 1, characterized in that: A second pressure sensor is provided at the oil outlet of the oil separator; the second pressure sensor is electrically connected to the numerical control system, and the numerical control system is electrically connected to a slave pump failure alarm device; the numerical control system controls the slave pump failure alarm device to give an alarm indication according to the monitoring signal of the second pressure sensor.

3. The numerically controlled hydraulic brake device according to claim 1 or 2, characterized in that: The side wall of the valve cylinder corresponding to the shoulder surface of the stepped hole is also provided with a drain port, and the drain port is connected to the oil return port of the valve cylinder through a drain pipe.

4. The numerically controlled hydraulic brake device according to claim 1 or 2, characterized in that: The CNC brake master cylinder oil distribution valve also includes a base plate; the valve cylinder and the oil distribution cylinder are both arranged on the base plate, and a CNC brake master cylinder oil distribution valve oil channel is arranged inside the base plate; the valve core oil outlet is connected to the oil inlet of the oil distribution cylinder of each of the sub-pumps through the CNC brake master cylinder oil distribution valve oil channel.

5. The numerically controlled hydraulic brake device according to claim 1 or 2, characterized in that: The high-pressure oil storage barrel includes a cylinder, a first baffle, a first spring and a second baffle; a cavity is provided inside the cylinder; the first baffle and the second baffle are provided in the cavity and are respectively slidably sealed with the inner side wall of the cylinder; the two ends of the first spring are respectively connected to the first baffle and the second baffle, and the expansion and contraction direction of the first spring is consistent with the sliding direction of the first baffle and the second baffle; an oil storage pipe and a pressure regulating pipe are respectively provided at the two ends of the cylinder, and the first hydraulic rod and the second hydraulic rod connected to the first baffle and the second baffle are respectively provided in the oil storage pipe and the pressure regulating pipe; the diameter of the oil storage pipe is smaller than the diameter of the pressure regulating pipe; the CNC hydraulic brake device also includes a second conversion valve ; The oil inlet of the second conversion valve is connected to the oil outlet of the one-way oil outlet valve; the oil outlet of the second conversion valve is connected to the pressure regulating pipe; the oil return port of the second conversion valve is connected to the oil return pipe; the second conversion valve is electrically connected to the numerical control system, and the numerical control system controls the conversion opening and closing of the second conversion valve; the cylinder body is provided with a first controller and a second controller, and the touch end of the first controller and the touch end of the second controller are both located in the cylinder body, and are respectively located at the positions corresponding to the maximum limited stroke and the minimum limited stroke of the first baffle; the action ends of the first controller and the second controller are both located outside the cylinder body, and are respectively connected to the switch control of the first conversion valve and the valve core pull plate through pull wires.

6. The numerically controlled hydraulic brake device according to claim 1 or 2, characterized in that: The brake cylinder includes a cylinder body, a push rod piston, a push rod, a spring baffle, a second spring, a fixed plate and a second retaining spring; an opening is provided at one end of the cylinder body, and an oil inlet of the sub-pump connected to the oil outlet of the oil distributor cylinder is provided at the other end of the cylinder body; the push rod piston sliding seal is arranged in the cylinder body, and the side of the push rod piston facing away from the opening forms a hydraulic chamber with the cylinder body, and the oil inlet of the sub-pump is connected with the hydraulic chamber; one end of the push rod is arranged on the side of the push rod piston facing the opening, and the other end of the push rod passes through the second spring and the fixed plate in sequence and is provided with a connecting seat for connecting the brake pad; the spring baffle is arranged on the push rod; an extension portion is provided on the extension of the opening, and the extension portion is connected to the fixed plate by bolts, and the two ends of the second spring respectively abut against the spring baffle and the fixed plate, and the size of the spring baffle is larger than the opening and abuts against the opening; the second retaining spring is arranged at the groove in the opening.

7. The numerically controlled hydraulic brake device according to claim 6, characterized in that: The oil inlet of the slave pump is provided with an air bolt, and the air bolt is threadedly connected to the oil inlet of the slave pump; the air bolt is provided with a through hole along the axial direction, and air bolt oil inlets connected to the through hole are provided on opposite sides of the screw rod of the air bolt, and the oil inlet is connected to the oil inlet of the slave pump through the through hole; a pin bolt is provided on the top surface of the nut of the air bolt, and the nut of the pin bolt is provided with a blind hole along the central axis, and air holes connected to the blind hole are provided on opposite sides of the screw rod of the pin bolt, and the air hole and the blind hole form a T-shaped exhaust hole; the rod of the pin bolt matches the through hole.

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