Adjusting method and adjusting device for brake master valve

Abstract

The invention relates to the field of manufacturing processes of brake master valves, in particular to an adjusting method and an adjusting device for a brake master valve. Before a switch base of the brake main valve is pushed, an upper piston of the brake main valve is pushed through the first acting force, so that the upper piston reaches the critical position; detecting displacement data of the upper piston pushed by the first acting force; judging whether the upper piston reaches a critical position or not according to the displacement data, so that a gap is formed between the upper piston and an upper valve of the brake main valve; after the upper piston reaches the critical position, the second acting force is used for pushing a switch base of the braking main valve; and when the microswitch moves along with the switch base to change the on-off state of the microswitch, the second acting force is terminated. When a gap is formed between the upper piston and the upper valve body, that is, when the upper piston and the upper valve body do not make contact with each other, the on-off state of the microswitch is switched, and therefore an ECU of a vehicle conducts a brake lamp of the vehicle through the change of an electric signal generated when the on-off state of the microswitch is switched.

Description

Technical Field

[0001] The invention relates to the field of manufacturing technology of a brake master valve, in particular to a regulating method and a regulating device for a brake master valve. Background Art

[0002] In the prior art, a master brake valve with a micro switch is provided, and its application number is 201220005739.8. In the prior art, the master brake valve includes a micro switch, which is arranged in a switch seat, and the switch seat is connected to the upper valve body of the master brake valve. One end of the lever of the micro switch is hinged to the micro switch assembly, and the other end of the lever is inserted into the upper valve body and connected to the annular groove of the upper piston. When the upper piston of the master brake valve receives the force of the push rod, the upper piston moves in the direction from the push rod seat to the upper valve, so that the upper piston overcomes the elastic force of the return spring. The upper valve is contacted and squeezed, causing the upper valve to be pushed, so that the air inlet and the air outlet are connected; during the movement of the upper piston along the push rod seat to the upper valve, the upper piston drives the lever of the microswitch, causing the lever to rotate relative to the microswitch assembly, so that the lever overcomes the elastic force of the coil spring and squeezes the contact on the microswitch assembly; after the contact squeezed by the lever satisfies the contact stroke, the on-off state of the microswitch assembly changes; the on-off state is, for example: the microswitch assembly changes from the on state to the off state, or the microswitch assembly changes from the off state to the on state.

[0003] The above-mentioned prior art brake master valve with micro switch, when it is actually applied to a vehicle, is designed so that the stroke of the upper piston is greater than the stroke of the contact of the micro switch, so that during the braking process of the vehicle, as the upper piston moves along the direction from the push rod seat to the upper valve, the contact of the micro switch first satisfies the stroke of the contact and causes the on-off state of the micro switch assembly to change, and then the upper piston continues to move and contacts and squeezes the upper valve after the on-off state of the micro switch assembly changes; the advantage of such a design is that if the above-mentioned brake master valve with micro switch is set on the leading vehicle, the ECU of the leading vehicle can first obtain the electrical signal generated when the on-off state of the micro switch assembly is changed, and control the brake lights of the leading vehicle to light up to prompt the driver of the following vehicle, and then the vehicle makes a braking action, then, from the perspective of the following vehicle, the driver of the following vehicle can observe the brake lights of the leading vehicle for a longer time, so that the driver of the following vehicle has sufficient time to brake the following vehicle, which is conducive to improving the safety of the leading and trailing vehicles during braking.

[0004] However, when the above-mentioned prior art master brake valve with micro switch is actually applied, it is easy for the leading vehicle to make a braking action first and then the brake lights of the leading vehicle to be lit; this will cause the distance between the leading vehicle and the following vehicle to be shortened first, so that the driver of the following vehicle observes that the brake lights are lit for a relatively short time, reducing the safety of the leading and following vehicles during the braking process.

[0005] Therefore, how to change the on-off state of the micro switch assembly first before the upper piston contacts and squeezes the upper valve becomes a technical problem to be solved. Summary of the invention

[0006] In order to solve the technical problem in the prior art of how to change the on / off state of the micro switch assembly first before the upper piston contacts and squeezes the upper valve, the present invention provides an adjustment method and an adjustment device for a brake master valve.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] According to one aspect of the present invention, there is provided a method for adjusting a brake master valve, comprising:

[0009] Generate a first force, and before the switch seat of the brake master valve is pushed, use the first force to push the upper piston of the brake master valve so that the upper piston reaches a critical position;

[0010] detecting displacement data of an upper piston pushed by a first force;

[0011] Determining whether the upper piston reaches a critical position according to the displacement data, wherein when the upper piston reaches the critical position, terminating the first acting force, so that a gap is formed between the upper piston and the upper valve of the brake master valve;

[0012] After the upper piston reaches the critical position, a second force is generated, and the second force is used to push the switch seat of the brake master valve, wherein a micro switch is arranged in the switch seat, and the micro switch has a contact, a lever and a switch assembly, one end of the lever is hinged to the switch assembly, the contact is arranged on the switch assembly, and the contact is located between the lever and the switch assembly, before the second force pushes the switch seat, the angle between the lever and the switch assembly is limited to a first angle, and after the second driving force pushes the switch seat, the angle between the lever and the switch assembly changes from the first angle to a second angle, and the second angle is greater than the first angle;

[0013] When the micro switch moves along with the switch seat so that the on / off state of the micro switch changes, the second acting force is terminated.

[0014] Furthermore, it also includes:

[0015] Before generating the first force, positioning the valve assembly of the brake master valve so that the brake master valve is restricted to an immobile state;

[0016] After the valve assembly is positioned, the switch seat and micro switch of the brake master valve are positioned so that the movement paths of the switch seat and the micro switch relative to the valve assembly are restricted to linear movement paths, and the linear movement paths are restricted to the direction from the upper piston of the brake master valve to the upper valve.

[0017] Furthermore, it also includes:

[0018] Obtaining pressure data, wherein the pressure data obtained before the upper piston of the brake master valve receives the first force is defined as raw data, and the pressure data obtained after the upper piston of the brake master valve receives the first force is defined as detection data;

[0019] Obtaining transformation information of pressure data from raw data to detection data;

[0020] According to the transformation information, start recording and obtaining the displacement data of the upper piston pushed by the first force;

[0021] When the displacement data meets the displacement threshold, a judgment result is obtained that the upper piston reaches the critical position; otherwise, a judgment result is obtained that the upper piston does not reach the critical position.

[0022] Furthermore, the displacement threshold is specifically a first straight line length data along a first direction, and the first direction is a direction from an upper piston to an upper valve of the brake master valve;

[0023] Alternatively, the displacement threshold is specifically the second straight line length data of the upper piston along the first direction and the third straight line length data of the upper piston along the second direction, wherein the first direction is the direction from the upper piston to the upper valve of the brake master valve, and the second direction is the direction from the upper valve to the upper piston of the brake master valve.

[0024] According to one aspect of the present invention, there is provided a regulating device for a brake master valve, comprising:

[0025] The first servo mechanism is used to generate a first force after being activated, and before the switch seat of the brake master valve is pushed, the first force is used to push the upper piston of the brake master valve so that the upper piston reaches a critical position;

[0026] A displacement sensor, used for detecting displacement data of an upper piston pushed by a first force;

[0027] The second servo mechanism is used to generate a second force after being activated, and use the second force to push the switch seat of the brake master valve;

[0028] The control mechanism is electrically connected to the first servo mechanism, the second servo mechanism, the displacement sensor and the micro switch, respectively, and is used to receive displacement data, and determine whether the upper piston has reached the critical position based on the displacement data, and to start the first servo mechanism. When the upper piston reaches the critical position, the first servo mechanism is stopped, so that the first force is terminated. It is also used to start the second servo mechanism after the upper piston reaches the critical position, and to detect whether the on-off state of the micro switch has changed, and when the on-off state of the micro switch has changed, the second servo mechanism is stopped, so that the second force is terminated.

[0029] Furthermore, it also includes a bottom plate, a guide rod seat, a support, a positioning seat, and a displacement sensor seat, wherein the support, the positioning seat, and the displacement sensor seat are respectively arranged on the bottom plate;

[0030] The first servo mechanism comprises a first servo electric cylinder, the first servo electric cylinder has a first output shaft, the first output shaft is limited to move in a straight line direction, a first connecting rod, a pressure sensor for obtaining pressure data, a connecting seat, a second connecting rod, a flexible connector and a push rod are sequentially connected to the output shaft, the first connecting rod is coaxially connected to the first output shaft and the pressure sensor respectively, the pressure sensor is limited between the first connecting rod and the second connecting rod, the second connecting rod is connected to the push rod through a flexible connector, the connecting seat is connected to the guide rod seat, the second connecting rod forms a sliding pair with the connecting seat and the guide rod seat respectively, the pressure sensor is limited between the guide rod seat and the first connecting rod, the first servo electric cylinder is arranged on the support, the guide rod seat and the support form a sliding pair through the guide rod, and the displacement sensor is arranged on the displacement sensor seat;

[0031] The second servo mechanism includes a second servo electric cylinder and a reciprocating assembly, the second servo electric cylinder has a second output shaft, the reciprocating assembly includes the push rod, a push rod seat, a coil spring, a pin shaft and a shift block, the two ends of the push rod are a head end and a tail end respectively, the head end forms a hinge structure with the shift block through the pin shaft, the tail end is provided with a blocking ring for blocking the coil spring, the push rod and the push rod seat form a sliding pair, the coil spring is sleeved on the push rod, the coil spring is restricted between the push rod seat and the blocking ring, the second output shaft and the push rod are configured to be coaxial, the second servo electric cylinder is arranged on the support, and the second servo electric cylinder is located above the first servo electric cylinder.

[0032] Furthermore, it also includes:

[0033] A first positioning mechanism is used to position the valve assembly of the brake master valve before generating the first force, so that the brake master valve is restricted to an immobile state;

[0034] The second positioning mechanism is used to position the switch seat and the micro switch of the brake master valve after the valve assembly is positioned, so that the movement paths of the switch seat and the micro switch relative to the valve assembly are respectively limited to linear movement paths, and the linear movement path is limited to the direction from the upper piston of the brake master valve to the upper valve;

[0035] The first positioning mechanism and the second positioning mechanism are electrically connected to the control mechanism respectively.

[0036] Further, the first positioning mechanism includes a first cylinder and a pressure block, the piston shaft of the first cylinder is connected to the pressure block, the first cylinder is arranged on the base plate through a mounting bracket, and a positioning area for positioning the main brake valve is formed between the pressure block and the positioning seat;

[0037] The second positioning mechanism includes two groups of positioning components, and each group of positioning components is respectively provided with a second cylinder, a shift fork, a pressure plate support and a pressure plate, the second cylinder is arranged on the base plate, the piston shaft of the second cylinder is coaxially connected with the shift fork, the axis center line of the piston shaft of the second cylinder is perpendicular to the plate surface relative to the base plate, the pressure plate is provided with a first section, a second section and a third section, the second section is located between the first section and the third section, the first section is used to contact the switch seat on the brake main valve, the second section is hinged to the pressure plate support, the pressure plate support is arranged on the base plate, the third section is provided with a slide groove, the slide groove is hinged to the shift fork, and the spacing between the first sections of the two pressure plates is greater than the spacing between the third sections of the two pressure plates.

[0038] The above technical solution has the following advantages or beneficial effects:

[0039] The adjustment method for the brake master valve provided by the present invention actually adjusts the position of the switch seat and the micro switch relative to the valve assembly. First, the upper piston of the valve assembly is adjusted to a critical position by a first force, and then the switch seat and the micro switch are driven by a second force. When the on-off state of the micro switch changes, the adjustment work is completed. After using the adjustment method for the brake master valve of this embodiment to adjust the position of the switch seat and the microswitch relative to the valve assembly, when the brake master valve is actually used in a vehicle and performs a braking action, when the upper piston is driven by the vehicle's push rod to move in the direction of the upper valve body, and there is a distance between the upper piston and the upper valve body, that is, the upper piston and the upper valve body do not contact each other, the air inlet and the air outlet of the brake master valve remain isolated from each other. At this time, the on-off state of the microswitch has been switched, so that the vehicle's ECU first turns on the vehicle's brake lights through the change of the electrical signal generated by the switching of the on-off state of the microswitch, and as the upper piston continues to move in the direction of the upper valve body, until the upper piston contacts and squeezes the upper valve body, the air inlet and the air outlet of the brake master valve are changed to a connected state. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 An electrical connection diagram of a regulating device for a brake master valve provided in Example 2 of the present invention;

[0041] Figure 2 A schematic diagram of the structure of a regulating device for a brake master valve provided in Embodiment 2 of the present invention;

[0042] Figure 3 A schematic diagram of the structure of a regulating device for a brake master valve provided in Embodiment 2 of the present invention;

[0043] Figure 4 for Figure 3 An enlarged view of part A in FIG.

[0044] Figure 5 A schematic diagram of the structure of a regulating device for a brake master valve provided in Embodiment 2 of the present invention;

[0045] Figure 6 A schematic diagram of the structure of an adjusting device for a brake master valve provided in Example 2 of the present invention.

[0046] Figure numerals: 1, first servo mechanism; 2, second servo mechanism; 3, displacement sensor; 4, control mechanism; 5, first positioning mechanism; 6, second positioning mechanism; 10, bottom plate; 11, guide rod seat; 12, support seat; 13, positioning seat; 14, displacement sensor seat; 15, first connecting rod; 16, pressure sensor; 17, connecting seat; 18, second connecting rod; 19, flexible connector; 20, ejector rod; 22, guide rod; 1 00, slide groove; 101, first servo electric cylinder; 102, first output shaft; 201, second servo electric cylinder; 202, reciprocating assembly; 203, second output shaft; 204, push rod; 205, push rod seat; 206, coil spring; 207, pin shaft; 208, shift block; 209, blocking ring; 501, first cylinder; 502, pressure block; 601, second cylinder; 602, shift fork; 603, pressure plate support; 604, pressure plate. DETAILED DESCRIPTION

[0047] In order to solve the technical problem in the prior art of how to change the on / off state of the micro switch assembly first before the upper piston contacts and squeezes the upper valve, the present invention provides an adjustment method and an adjustment device for a brake master valve.

[0048] Embodiment 1:

[0049] This embodiment provides a method for adjusting a brake master valve. Specifically, the method for adjusting a brake master valve includes:

[0050] Generate a first force, and before the switch seat of the brake master valve is pushed, use the first force to push the upper piston of the brake master valve so that the upper piston reaches a critical position;

[0051] detecting displacement data of an upper piston pushed by a first force;

[0052] Determining whether the upper piston reaches a critical position according to the displacement data, wherein when the upper piston reaches the critical position, terminating the first acting force, so that a gap is formed between the upper piston and the upper valve of the brake master valve;

[0053] After the upper piston reaches the critical position, a second force is generated, and the second force is used to push the switch seat of the brake master valve, wherein a micro switch is arranged in the switch seat, and the micro switch has a contact, a lever and a switch assembly, one end of the lever is hinged to the switch assembly, the contact is arranged on the switch assembly, and the contact is located between the lever and the switch assembly, before the second force pushes the switch seat, the angle between the lever and the switch assembly is limited to a first angle, and after the second driving force pushes the switch seat, the angle between the lever and the switch assembly changes from the first angle to a second angle, and the second angle is greater than the first angle;

[0054] When the micro switch moves along with the switch seat so that the on / off state of the micro switch changes, the second acting force is terminated.

[0055] For the specific structure of the brake master valve, please refer to the patent document entitled: Brake master valve with micro switch, application number 201220005739.8; for the convenience of description of this embodiment, the above-mentioned brake master valve with micro switch, except for the micro switch and the switch seat, is defined as a valve assembly.

[0056] The adjustment method for the brake master valve of this embodiment is applied to the manufacturing process of the above-mentioned brake master valve with micro switch (referred to as brake master valve), and can also be applied to the maintenance process of the brake master valve.

[0057] In this embodiment, before adjusting the positions of the micro switch and the switch seat of the brake master valve relative to the valve assembly, the micro switch and the switch seat need to be temporarily fixed to the valve assembly; specifically, before generating the first force, the valve assembly of the brake master valve is positioned so that the brake master valve is restricted to an immobile state;

[0058] After the valve assembly is positioned, the switch seat and micro switch of the brake master valve are positioned so that the movement paths of the switch seat and the micro switch relative to the valve assembly are restricted to linear movement paths, and the linear movement paths are restricted to the direction from the upper piston of the brake master valve to the upper valve.

[0059] After the valve assembly of the brake master valve is positioned, the valve assembly is restricted to an immobile state, so that when a first force is applied to the push rod seat in the valve assembly, the valve assembly as a whole cannot be displaced;

[0060] After the micro switch and the switch seat are positioned relative to the valve assembly respectively, the micro switch and the switch seat form a movable state relative to the valve assembly, wherein the micro switch is connected to the switch seat, the micro switch is arranged in the switch seat, and when the switch seat receives the second force, the movement path of the switch seat and the micro switch is limited to a linear movement path.

[0061] From the perspective of the brake master valve, a mounting groove for arranging the switch seat and the micro switch is provided on the upper valve body of the valve assembly. In actual settings, the length of the mounting groove is slightly greater than the length of the switch seat, which enables the switch seat to have multiple mounting positions relative to the mounting groove. In this embodiment, along the direction from the push rod seat to the upper valve, the end of the mounting groove away from the upper valve is defined as the first end, and the end of the mounting groove close to the upper valve is defined as the second end. Before the first force is generated, when the switch seat and the micro switch are temporarily fixed on the valve assembly, the switch seat and the micro switch are restricted to the position of the first end.

[0062] Due to the micro switch being limited to the position of the first end and the lever of the micro switch being affected by the upper piston and the return spring in the valve assembly, the current angle between the lever of the micro switch and the micro switch assembly is limited to the first angle, so that the lever presses the contact point, and the current on-off state of the micro switch assembly is the first state;

[0063] If the micro switch and the switch seat are set at the second end, then, due to the micro switch being limited to the second end position and the micro switch lever being affected by the upper piston and the return spring in the valve assembly, the angle between the micro switch lever and the micro switch assembly is limited to the second angle, and the lever still presses the contact, but the current on-off state of the micro switch assembly is changed to the second state; the second angle is greater than the aforementioned first angle, because the position of the micro switch assembly has changed relative to the position of the valve assembly, and because one end of the micro switch lever is hinged to the micro switch assembly and the other end is installed in the annular groove of the upper piston, the end of the lever located in the annular groove of the upper piston remains relatively stationary, and the end of the lever hinged to the micro switch assembly can be tilted along the direction from the upper piston to the upper valve as the micro switch assembly is set at different positions of the installation groove, thereby increasing the angle of the lever relative to the micro switch assembly.

[0064] After the valve assembly is positioned, and after the micro switch and the switch seat are positioned relative to the valve assembly, a first force is generated; the first force is used to push the upper piston of the brake master valve. Specifically, before the switch seat of the brake master valve is pushed, the first force is applied to the push rod seat of the brake master valve, and after the push rod seat receives the first force, it generates a movement trend along the direction of the push rod seat to the upper valve, so that the push rod seat applies the first force to the upper piston.

[0065] It should be understood that after the upper piston receives the first force, the upper piston can overcome the elastic force of the return spring of the brake master valve, so that the upper piston can make a displacement along the direction from the push rod seat to the upper valve; however, since the upper piston is arranged inside the valve assembly, the staff cannot visually observe whether the upper piston is displaced; for this situation, in this embodiment, the displacement of the upper piston is detected by obtaining displacement data, and the displacement data is obtained by the displacement sensor in the later embodiment 2, which will not be mentioned here.

[0066] It should be understood that, due to the assembly errors between the multiple parts of the valve assembly, the angle of the micro switch lever relative to the micro switch assembly will be affected; therefore, in this embodiment, this problem is solved by obtaining pressure data.

[0067] Specifically, the adjustment method for the brake master valve of this embodiment further includes:

[0068] Obtaining pressure data, wherein the pressure data obtained before the upper piston of the brake master valve receives the first force is defined as raw data, and the pressure data obtained after the upper piston of the brake master valve receives the first force is defined as detection data;

[0069] Obtaining transformation information of pressure data from raw data to detection data;

[0070] According to the transformation information, start recording and obtaining the displacement data of the upper piston pushed by the first force;

[0071] When the displacement data meets the displacement threshold, a judgment result is obtained that the upper piston reaches the critical position; otherwise, a judgment result is obtained that the upper piston does not reach the critical position.

[0072] The pressure data is obtained by the pressure sensor in the later-described embodiment 2, which will not be mentioned here for the time being; the pressure data is essentially the reaction force of the upper piston on the pressure sensor after receiving the first force.

[0073] In this embodiment, a technical feature of a critical position is proposed. The critical position is the position of the upper piston when the upper piston approaches but does not contact the upper valve, and the angle of the lever of the micro switch relative to the micro switch assembly reaches an ideal angle, so that the lever squeezes the contact point and causes the on-off state of the micro switch assembly to be switched;

[0074] Taking the critical position as a reference, in actual adjustment, as long as the upper piston moves to the critical position, the on-off state of the microswitch assembly is changed, which can solve the technical problem of "the assembly error between multiple components of the valve assembly will affect the angle of the microswitch lever relative to the microswitch assembly"

[0075] In actual regulation, whether the upper piston reaches the critical position is determined by displacement data; however, since the displacement sensor actually detects the displacement data of the push rod of the first servo mechanism in the second embodiment described later, the data before the push rod actually contacts the push rod seat of the valve assembly (i.e., the idle stroke data of the push rod) should not be used as the displacement data of the upper piston. On the contrary, the displacement data formed by the push rod actually pushing the upper piston to move should be used as the displacement data of the upper piston. In other words, if the displacement data of the upper piston is to be obtained, it is necessary to first determine whether the push rod has contacted the upper piston and applied the first force to the upper piston.

[0076] In this embodiment, whether the push rod contacts the upper piston and pushes the upper piston to move is determined by the change in pressure data; specifically, before the push rod contacts the upper piston, the pressure data is original data, and the original data is zero. When the push rod contacts the upper piston and pushes the upper piston to move, the pressure data is detection data, and the detection data is greater than zero. By obtaining the transition information of the pressure data from the original data to the detection data, it can be obtained that the current push rod has contacted and pushed the upper piston to move. At this time, the displacement data of the upper piston is recorded according to the transition information.

[0077] It should be understood that the aforementioned pressure data is generated by a pressure sensor, and the pressure data is transmitted to the control mechanism in the later-described embodiment 2, which calculates the pressure data to obtain the transformation information, and obtains the displacement data of the upper piston through the control mechanism.

[0078] The above content has already proposed that the upper piston needs to reach a critical position. Then, how to judge whether the upper piston has reached the critical position becomes a technical problem to be solved.

[0079] In this embodiment, the displacement data of the upper piston is compared with the displacement threshold. If the displacement data satisfies the displacement threshold, it means that the current upper piston has reached the critical position.

[0080] To facilitate understanding by those skilled in the art, this embodiment provides the following two technical solutions for displacement thresholds.

[0081] Solution 1: The displacement threshold is specifically the first straight line length data along the first direction, and the first direction is the direction from the upper piston to the upper valve of the brake master valve.

[0082] Among them, firstly obtain the first straight line length data; select a suitable position between the upper piston and the upper valve, and verify the suitable position through experimental means, as long as the upper piston moves to the suitable position, the on-off state of the micro switch assembly is changed; after obtaining the suitable position, the length data between the upper piston and the suitable position can be used as the first straight line length data.

[0083] In practical application scheme one, the upper piston moves along the first direction under the push of the first force. If the displacement data satisfies the first straight line length data, it means that the upper piston has reached the critical position. During the movement of the upper piston, the upper piston maintains straight line motion along the first direction.

[0084] Option 2, the displacement threshold is specifically the second straight line length data of the upper piston along the first direction and the third straight line length data of the upper piston along the second direction, wherein the first direction is the direction from the upper piston to the upper valve of the brake master valve, and the second direction is the direction from the upper valve to the upper piston of the brake master valve.

[0085] Among them, first, the upper piston is pushed to move along the first direction by a first force until the upper piston contacts and squeezes the valve, so that the upper piston changes from a moving state to a stationary state, and the length data of the upper piston moving along the first direction is recorded as the second straight line length data; then, the first force is reduced, so that the upper piston moves along the second direction under the action of the return spring of the valve assembly until the upper piston is separated from the upper valve and a certain gap is formed, thereby terminating the movement of the upper piston along the second direction, and the length data of the upper piston moving along the second direction is recorded as the third length data.

[0086] In the actual application scheme two, the upper piston, pushed by the first force, first moves along the first direction. When the displacement data of the upper piston meets the second straight line length data, the movement of the upper piston is terminated and the first force is reduced. After the first force is reduced, when the elastic force of the return spring in the brake master valve is greater than the reduced first force, the difference between the elastic force of the return spring and the first force causes the upper piston to move along the second direction. When the displacement data of the upper piston meets the third straight line length data, the movement of the upper piston is terminated, and the upper piston has reached the critical position at this time. During the movement of the upper piston, the upper piston first moves along the first direction and then moves along the second direction.

[0087] In this embodiment, when the upper piston moves to the critical position, the first force is terminated, and a gap is formed between the upper piston and the upper valve at this time. In other words, the upper piston does not contact the upper valve at this time; the current state of the upper piston being located at the critical position is maintained, and then the second force is generated, so that the second force pushes the switch seat of the brake master valve, thereby causing the switch seat and the micro switch disposed in the switch seat to move together;

[0088] During the movement of the microswitch, an electrical connection is formed between the control mechanism in the later-described embodiment 2 and the microswitch, so that the control mechanism can obtain the on-off state of the microswitch; if the control mechanism detects that the on-off state of the microswitch has changed, for example: the control mechanism detects that the on-off state of the microswitch at the previous moment is the on-state, and the on-off state of the microswitch at the next moment is the off-state, or the control mechanism detects that the on-off state of the microswitch at the previous moment is the off-state, and the on-off state of the microswitch at the next moment is the on-state, then, when the on-off state of the microswitch changes, the second force is terminated; at this time, a gap is formed between the upper piston and the upper valve, that is, the position adjustment of the upper piston relative to the upper valve is completed, and the position of the microswitch has been adjusted.

[0089] After adjustment in the above manner, the staff should fix the switch seat relative to the valve assembly so that the fixed switch seat and the micro switch cannot be displaced relative to the valve assembly; when the fixed brake master valve is applied to the vehicle and brakes are applied, the push rod seat of the brake master valve receives the kinetic energy of the vehicle's push rod, so that the push rod seat pushes the upper piston to move in the direction from the push rod seat to the upper valve body;

[0090] If the current on-off state of the micro switch is in the on state, then when the upper piston moves to the critical position, that is, the upper piston forms a gap with the upper valve but has not yet contacted and squeezed the upper valve, the lever of the micro switch is pressed by the force of the upper piston to squeeze the contact of the micro switch, so that the on-off state of the micro switch changes from the on state to the off state;

[0091] Alternatively, if the current on-off state of the micro switch is in the cut-off state, then when the upper piston moves to the critical position, that is, the upper piston forms a gap with the upper valve but has not yet contacted and squeezed the upper valve, the lever of the micro switch is subjected to the force of the upper piston and squeezes the contact of the micro switch, so that the on-off state of the micro switch changes from the cut-off state to the on state;

[0092] From the perspective of vehicle braking, the on-off state of the micro switch is changed, and the time node of this change is before the time node when the upper piston contacts and squeezes the upper valve body. Therefore, the vehicle's ECU can first turn on the brake lights according to the change of the on-off state of the micro switch, and then brake the vehicle.

[0093] In the method for adjusting the brake master valve of this embodiment, in the process of adjusting the position of the switch seat and the micro switch relative to the valve assembly, the upper piston of the valve assembly is first adjusted to the critical position by the first force, and then the switch seat and the micro switch are driven by the second force. When the on-off state of the micro switch changes, the adjustment work is completed;

[0094] After using the adjustment method for the brake master valve of this embodiment to adjust the position of the switch seat and the microswitch relative to the valve assembly, when the brake master valve is actually used in a vehicle and performs a braking action, when the upper piston is driven by the vehicle's push rod to move in the direction of the upper valve body, and there is a distance between the upper piston and the upper valve body, that is, the upper piston and the upper valve body do not contact each other, the air inlet and the air outlet of the brake master valve remain isolated from each other. At this time, the on-off state of the microswitch has been switched, so that the vehicle's ECU first turns on the vehicle's brake lights through the change of the electrical signal generated by the switching of the on-off state of the microswitch, and as the upper piston continues to move in the direction of the upper valve body, until the upper piston contacts and squeezes the upper valve body, the air inlet and the air outlet of the brake master valve are changed to a connected state.

[0095] Therefore, the adjustment method for the brake master valve provided in this embodiment solves the technical problem of how to change the on-off state of the micro switch assembly first before the upper piston contacts and squeezes the upper valve.

[0096] Embodiment 2:

[0097] In this embodiment, a regulating device for a brake master valve is provided, which is used to implement the regulating method for the brake master valve in the aforementioned embodiment 1.

[0098] For details, see Figure 1 or Figure 2 The regulating device for the brake master valve of this embodiment includes:

[0099] The first servo mechanism 1 is used to generate a first force after being activated, and before the switch seat of the brake master valve is pushed, the first force is used to push the upper piston of the brake master valve so that the upper piston reaches a critical position;

[0100] A displacement sensor 3, used to detect displacement data of the upper piston pushed by the first force;

[0101] The second servo mechanism 2 is used to generate a second force after being activated, and use the second force to push the switch seat of the brake master valve;

[0102] The control mechanism 4 is electrically connected to the first servo mechanism 1, the second servo mechanism 2, the displacement sensor 3 and the micro switch, respectively, and is used to receive displacement data and determine whether the upper piston has reached the critical position based on the displacement data, and is used to start the first servo mechanism 1. When the upper piston reaches the critical position, the first servo mechanism 1 is stopped, so that the first force is terminated, and is also used to start the second servo mechanism 2 after the upper piston reaches the critical position, and is used to detect whether the on-off state of the micro switch changes, and when the on-off state of the micro switch changes, the second servo mechanism 2 is stopped, so that the second force is terminated.

[0103] In practical applications, the valve assembly, switch seat and micro switch of the brake master valve are arranged on the regulating device for the brake master valve;

[0104] The control mechanism 4 first controls the first servo mechanism 1 to generate a first force, so that the first force pushes the upper piston in the valve assembly, so that the upper piston reaches a critical position, and a gap is formed between the upper piston at the critical position and the upper valve body in the valve assembly; in this process, the control mechanism 4 obtains the displacement data of the upper piston through the displacement sensor 3, which is essentially that the displacement sensor 3 obtains the displacement data of the movable part of the first servo mechanism 1, and indirectly obtains the displacement data of the upper piston;

[0105] Then, the control mechanism 4 determines whether the upper piston has reached the critical position through the displacement data. If the upper piston has reached the critical position, for example, the program executed by the control mechanism 4 includes a displacement threshold. If the displacement data satisfies the displacement threshold, a judgment result is obtained that the upper piston has reached the critical position. Conversely, if the displacement data does not satisfy the displacement threshold, a judgment result is obtained that the upper piston has not reached the critical position. When the judgment result that the upper piston has reached the critical position is obtained, the control mechanism 4 terminates the first servo mechanism 1 from generating the first force. For the specific content of the displacement threshold, please refer to the relevant content of the displacement threshold in the aforementioned embodiment 1, which will not be repeated here.

[0106] After the first servo mechanism 1 is terminated, the control mechanism 4 controls the second servo mechanism 2 to generate a second force, so that the second force pushes the switch seat and the micro switch;

[0107] When the second force is generated, if the control mechanism 4 detects that the on / off state of the micro switch has changed, then the control mechanism 4 terminates the second servo mechanism 2;

[0108] For example, if the microswitch is in the on state at the previous moment, so that the electrical signal received by the control mechanism 4 is true, then when the microswitch changes to the off state at the next moment, the electrical signal received by the control mechanism 4 is false. At the moment when the electrical signal of the microswitch obtained by the control mechanism 4 changes from true to false, the control mechanism 4 terminates the second servo mechanism 2; or, if the microswitch is in the off state at the previous moment and changes to the on state at the next moment, the control mechanism 4 terminates the second servo mechanism 2 at the moment when the electrical signal of the microswitch obtained by the control mechanism 4 changes from false to true.

[0109] It should be understood that the control mechanism 4 preferably adopts a PLC; in other embodiments, a single chip microcomputer or an industrial computer can also be used as the control mechanism 4.

[0110] For further information, see Figure 3 or Figure 4 or Figure 5 The regulating device for the brake master valve of this embodiment also includes a base plate 10, a guide rod seat 11, a support 12, a positioning seat 13, and a displacement sensor seat 14. The support 12, the positioning seat 13 and the displacement sensor seat 14 are respectively arranged on the base plate 10;

[0111] The first servo mechanism 1 includes a first servo electric cylinder 101, the first servo electric cylinder 101 has a first output shaft 102, the first output shaft 102 is limited to move along a straight line direction, and the output shaft is sequentially connected with a first connecting rod 15, a pressure sensor 16 for obtaining pressure data, a connecting seat 17, a second connecting rod 18, a flexible connector 19 and a push rod 20, the first connecting rod 15 is coaxially connected to the first output shaft 102 and the pressure sensor 16, the pressure sensor 16 is limited between the first connecting rod 15 and the second connecting rod 18, the second connecting rod 18 is connected to the push rod 20 through the flexible connector 19, the connecting seat 17 is connected to the guide rod seat 11, the second connecting rod 18 forms a sliding pair with the connecting seat 17 and the guide rod seat 11, the pressure sensor 16 is limited between the guide rod seat 11 and the first connecting rod 15, the first servo electric cylinder 101 is arranged on the support 12, the guide rod seat 11 and the support 12 form a sliding pair through the guide rod 22, and the displacement sensor 3 is arranged on the displacement sensor seat 14;

[0112] The second servo mechanism 2 includes a second servo electric cylinder 201 and a reciprocating assembly 202. The second servo electric cylinder 201 has a second output shaft 203. The reciprocating assembly 202 includes a push rod 204, a push rod seat 205, a coil spring 206, a pin shaft 207 and a shift block 208. The two ends of the push rod 204 are a head end and a tail end respectively. The head end forms a hinge structure with the shift block 208 through the pin shaft 207. The tail end is provided with a blocking ring 209 for blocking the coil spring 206. The push rod 204 and the push rod seat 205 form a sliding pair. The coil spring 206 is sleeved on the push rod 204, and the coil spring 206 is restricted between the push rod seat 205 and the blocking ring 209. The second output shaft 203 and the push rod 204 are configured to be coaxial. The second servo electric cylinder 201 is arranged on the support 12, and the second servo electric cylinder 201 is located above the first servo electric cylinder 101.

[0113] The support 12 is arranged on the bottom plate 10. The first function of the support 12 is to install the first servo mechanism 1 and the second servo mechanism 2. The second function of the support 12 is to limit the first servo mechanism 1 and the second servo mechanism 2 according to the position of the valve assembly and the switch seat of the brake master valve. For example, in this embodiment, when the brake master valve is arranged on the regulating device for the brake master valve, the valve assembly is located at a relatively low position, and the switch seat and the micro switch are located at a relatively high position. Thus, the support 12 limits the first servo mechanism 1 at a relatively low position, and limits the second servo mechanism 2 at a relatively high position.

[0114] The connection method between the support 12 and the first servo mechanism 1 and the second servo mechanism 2 is common knowledge known to those skilled in the art and will not be described in detail here.

[0115] The first servo electric cylinder 101 of the first servo mechanism 1 serves as a power source for generating a first force. The first output shaft 102 of the first servo electric cylinder 101, the first connecting rod 15 connected to the first output shaft 102, and the pressure sensor 16, the guide rod seat 11, the connecting seat 17, the second connecting rod 18, the flexible connector 19 and the push rod 20 connected in sequence to the first connecting rod 15 are respectively the movable parts or moving parts mentioned in the above content, and are also transmission parts. Among them, the push rod 20 is used to contact the push rod 20 seat in the valve assembly and apply the first force generated by the first servo electric cylinder 101 to the push rod 20 seat, so that the push rod 20 seat can push the upper piston in the valve assembly.

[0116] The guide rod seat 11 forms a sliding pair with the support 12 through the guide rod 22, and its purpose is to limit the first connecting rod 15, the pressure sensor 16, the connecting seat 17, the second connecting rod 18 and the flexible connector 19 from making linear motion, wherein the guide rod 22 forms a clearance fit relative to the support 12, and the guide rod seat 11 drives the guide rod 22 to move relative to the support 12 when receiving the first force;

[0117] One end of the push rod 20 is connected to the flexible connector 19. When the other end of the push rod 20 contacts the push rod 20 seat of the brake master valve, since the push rod 20 seat is provided with a ball socket that forms a convergent state along the axial direction (please refer to the position where the push rod f in the prior art CN202378856U is inserted for the ball socket), the opening diameter of the ball socket displayed on the surface of the valve assembly is relatively large, and the internal diameter gradually decreases. Therefore, the push rod 20 can be tilted after contacting the ball socket. This inclination causes the flexible connector 19 to deform. Conversely, when the push rod 20 is separated from the ball socket, the flexible connector 19 can return to its original state. It should be understood that the reason for using the flexible connector 19 is to facilitate the end of the push rod 20 to contact the axial position of the ball socket, so that the push rod 20 seat can move along the axial direction of the valve assembly to avoid or reduce the tilting phenomenon.

[0118] The second servo electric cylinder 201 of the second servo mechanism 2 is used as a power source for generating a second force, and the second output shaft 203 of the second servo electric cylinder 201 is used to transmit the second force to the reciprocating assembly 202; in the reciprocating assembly 202, the push rod 204 is restricted to a telescopic pair by the push rod seat 205 and the coil spring 206;

[0119] When the push rod 204 receives the second force applied by the second output shaft 203, the push rod 204 moves away from the second servo electric cylinder 201 and approaches the switch seat of the brake master valve. In this process, the spring is compressed by the push rod seat 205 and the push rod 204, wherein the end of the push rod 204 facing the second output shaft 203 is provided with a blocking ring 209 to prevent the spring from detaching, and the spring is configured as a spiral spring 206 and sleeved on the push rod 204. The spring is restricted between the push rod seat 205 and the blocking ring 209 to perform a telescopic action; when the second force is reduced or lost, the spring drives the push rod 204, so that the push rod 204 moves away from the switch seat and approaches the second servo electric cylinder 201;

[0120] The pin shaft 207 is used to connect the shift block 208 with the push rod 204. The shift block 208 has a contoured structure. The contoured structure of the shift block 208 matches a part of the structure of the switch seat of the main brake valve. The contoured structure is used to increase the contact area of ​​the push rod 204 relative to the switch seat and balance the force applied to the switch seat, so that the switch seat can be smoothly pushed by the second force, and the switch seat will not tilt or other negative phenomena.

[0121] It should be understood that in other embodiments, the shift block 208 may be omitted.

[0122] The positioning seat 13 is arranged on the base plate 10. One of the functions of the positioning seat 13 is to position the reciprocating assembly 202 of the aforementioned second servo mechanism 2 relative to the base plate 10. Specifically, the push rod seat 205 is positioned relative to the base plate 10 through the positioning seat 13; the second function of the positioning seat 13 is to cooperate with the first positioning mechanism described later to clamp the main brake valve.

[0123] It should be understood that since the positioning seat 13 is actually located between the first servo mechanism 1 and the first positioning mechanism described later, a through hole for the push rod 20 to penetrate must be provided on the positioning seat 13; considering that the push rod 20 can tilt when it contacts the ball socket, the diameter of the through hole provided on the positioning seat 13 should be configured to be a relatively large diameter to form a space that satisfies the tilt angle of the push rod 20.

[0124] The displacement sensor seat 14 is arranged on the base plate 10, and its function is to position and fix the displacement sensor 3, so that the displacement sensor 3 is limited to a height matching the aforementioned movable component and can detect the displacement of the movable component; in this embodiment, it is preferred to detect the displacement of the top rod 20 through the displacement sensor 3, and the displacement sensor 3 is arranged on the side of the top rod 20 through the displacement sensor seat 14, and the height is consistent with the top rod 20; in other embodiments, the displacement of components such as the first connecting rod 15 or the guide rod 22 can also be detected by the displacement sensor 3, as long as the displacement sensor 3 is arranged on the side of the first connecting rod 15 or the guide rod 22 through the displacement sensor seat 14, and the height is consistent with the first connecting rod 15 or the guide rod 22.

[0125] For further information, see Figures 1 to 6 The regulating device for the brake master valve of this embodiment further includes:

[0126] A first positioning mechanism 5 is used to position the valve assembly of the brake master valve before generating the first force, so that the brake master valve is restricted to an immobile state;

[0127] The second positioning mechanism 6 is used to position the switch seat and the micro switch of the brake master valve after the valve assembly is positioned, so that the movement paths of the switch seat and the micro switch relative to the valve assembly are respectively limited to linear movement paths, and the linear movement paths are limited to the direction from the upper piston of the brake master valve to the upper valve;

[0128] The first positioning mechanism 5 and the second positioning mechanism 6 are electrically connected to the control mechanism 4 respectively.

[0129] As a whole, the first positioning mechanism 5 cooperates with the aforementioned positioning seat 13 to position the valve assembly of the brake master valve on the brake master valve regulating device of this embodiment; the first positioning mechanism 5 can be implemented by an electric mechanism or a pneumatic mechanism; the first positioning mechanism 5 is used to generate a third force along a straight line direction, so that the brake master valve is clamped between the first positioning mechanism 5 and the positioning seat 13 under the action of the third force;

[0130] It should be understood that the first positioning mechanism 5 is disposed on the bottom plate 10, but the direction of the third force generated by the first positioning mechanism 5 cannot be configured as a vertical direction, so that when the third force acts on the valve assembly, the movement trend of the valve assembly cannot be restricted to a vertical direction, so that the second positioning mechanism 6 can position the switch seat and the micro switch;

[0131] In this embodiment, preferably, the first positioning mechanism 5 is set as a cylinder; specifically, the first positioning mechanism 5 includes a first cylinder 501 and a pressure block 502, the piston shaft of the first cylinder 501 is connected to the pressure block 502, the first cylinder 501 is set on the bottom plate 10 through a mounting bracket, and a positioning area for positioning the main brake valve is formed between the pressure block 502 and the positioning seat 13. The third force generated by the first cylinder 501 is transmitted to the pressure block 502 in the horizontal direction through the piston shaft, and the pressure block 502 applies the third force to the positioned valve assembly in the horizontal direction, so that the valve assembly moves along the direction from the first positioning mechanism 5 to the positioning seat 13 until the valve assembly is clamped by the pressure block 502 and the positioning seat 13.

[0132] From the perspective of the overall regulating device for the brake master valve, the second positioning mechanism 6 cooperates with the aforementioned base plate 10 to position the switch seat and the micro switch provided on the valve assembly relative to the valve assembly; the second positioning mechanism 6 can be implemented by an electric mechanism or a pneumatic mechanism; the second positioning mechanism 6 is used to generate a fourth force in the vertical direction, so that the switch seat is restricted between the second positioning mechanism 6 and the base plate 10 under the action of the fourth force;

[0133] It should be understood that the fourth force of the second positioning mechanism 6 is applied to the switch seat, so that when the switch seat is restricted between the second positioning mechanism 6 and the bottom plate 10, the switch seat is restricted to a static state in the vertical direction, that is, the switch seat cannot move in the vertical direction, but the switch seat can generate a horizontal displacement in the horizontal direction when receiving the second force of the second servo mechanism 2 as mentioned above; wherein, it is only necessary to restrict the sum of the friction force of the switch seat relative to the second positioning mechanism 6 and the friction force of the switch seat relative to the valve assembly to be slightly less than the "second force of the second servo mechanism 2", so that when the switch seat receives the second force, it can overcome the friction force of the second positioning mechanism 6 and the friction force of the switch seat relative to the valve assembly, thereby causing the switch seat and the micro switch to move relative to the valve assembly;

[0134] In the present embodiment, preferably, the second positioning mechanism 6 is configured as a pneumatic mechanism; specifically, the second positioning mechanism 6 includes two groups of positioning components, each group of positioning components is respectively provided with a second cylinder 601, a shift fork 602, a pressure plate support 603 and a pressure plate 604, the second cylinder 601 is arranged on the base plate 10, the piston shaft of the second cylinder 601 is coaxially connected with the shift fork 602, the axis center line of the piston shaft of the second cylinder 601 is perpendicular to the plate surface relative to the base plate 10, the pressure plate 604 is provided with a first section, a second section and a third section, the second section is located between the first section and the third section, the first section is used to contact the switch seat on the brake main valve, the second section is hinged to the pressure plate support 603, the pressure plate support 603 is arranged on the base plate 10, the third section is provided with a slide groove 100, the slide groove 100 is hinged to the shift fork 602, and the spacing of the first sections of the two pressure plates 604 is greater than the spacing of the third sections of the two pressure plates 604.

[0135] The second cylinder 601 generates a fourth force along the vertical direction, which is used to drive the fork 602 to move in the vertical direction; the third section of the pressure plate 604 is hinged to the fork 602 through the slide groove 100, and at the same time, the second section of the pressure plate 604 is hinged to the pressure plate support 603, and the pressure plate support 603 is arranged on the bottom plate 10, so that when the fork 602 moves upward in the vertical direction, the third section of the pressure plate 604 swings from bottom to top in the vertical direction with the hinge axis of the second section of the pressure plate 604 and the pressure plate support 603 as the axis center line, and correspondingly, the first section of the pressure plate 604 swings from top to bottom in the vertical direction; when the pressure plate 604 contacts the switch seat arranged on the valve assembly, the first section of the pressure plate 604 applies pressure to the switch seat from top to bottom in the vertical direction, so that the switch seat is positioned between the first section of the pressure plate 604 and the valve assembly.

[0136] It should be understood that the aforementioned content proposes that the sum of the friction force of the switch seat relative to the second positioning mechanism 6 and the friction force of the switch seat relative to the valve assembly should be limited to be slightly less than the "second force of the second servo mechanism 2". The specific limitation is achieved by limiting the air pressure of the second cylinder 601. The staff can obtain fourth forces of different sizes by setting the air pressure of the second cylinder 601 to different air pressures. Correspondingly, the switch seat is pushed by the second force generated by the second servo electric cylinder 201, as long as the second force is greater than the sum of the "friction force between the switch seat and the valve assembly" and the "friction force between the switch seat and the pressure plate 604" generated under the action of the fourth force.

[0137] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for adjusting a brake master valve, characterized in that: include: Generate a first force, and before the switch seat of the brake master valve is pushed, use the first force to push the upper piston of the brake master valve so that the upper piston reaches a critical position; detecting displacement data of an upper piston pushed by a first force; Determining whether the upper piston reaches a critical position according to the displacement data, wherein when the upper piston reaches the critical position, terminating the first acting force, so that a gap is formed between the upper piston and the upper valve of the brake master valve; After the upper piston reaches the critical position, a second force is generated, and the second force is used to push the switch seat of the brake master valve, wherein a micro switch is arranged in the switch seat, and the micro switch has a contact, a lever and a switch assembly, one end of the lever is hinged to the switch assembly, the contact is arranged on the switch assembly, and the contact is located between the lever and the switch assembly, before the second force pushes the switch seat, the angle between the lever and the switch assembly is limited to a first angle, and after the second driving force pushes the switch seat, the angle between the lever and the switch assembly changes from the first angle to a second angle, and the second angle is greater than the first angle; When the micro switch moves along with the switch seat so that the on / off state of the micro switch changes, the second acting force is terminated.

2. The method for adjusting the brake master valve according to claim 1, characterized in that: Also includes: Before generating the first force, positioning the valve assembly of the brake master valve so that the brake master valve is restricted to an immobile state; After the valve assembly is positioned, the switch seat and micro switch of the brake master valve are positioned so that the movement paths of the switch seat and the micro switch relative to the valve assembly are restricted to linear movement paths, and the linear movement paths are restricted to the direction from the upper piston of the brake master valve to the upper valve.

3. The method for adjusting the brake master valve according to claim 1, characterized in that: Also includes: Obtaining pressure data, wherein the pressure data obtained before the upper piston of the brake master valve receives the first force is defined as raw data, and the pressure data obtained after the upper piston of the brake master valve receives the first force is defined as detection data; Obtaining transformation information of pressure data from raw data to detection data; According to the transformation information, start recording and obtaining the displacement data of the upper piston pushed by the first force; When the displacement data meets the displacement threshold, a judgment result is obtained that the upper piston reaches the critical position; otherwise, a judgment result is obtained that the upper piston does not reach the critical position.

4. The method for adjusting the brake master valve according to claim 3, characterized in that: The displacement threshold is specifically a first straight line length data along a first direction, where the first direction is a direction from an upper piston to an upper valve of the brake master valve; Alternatively, the displacement threshold is specifically the second straight line length data of the upper piston along the first direction and the third straight line length data of the upper piston along the second direction, wherein the first direction is the direction from the upper piston to the upper valve of the brake master valve, and the second direction is the direction from the upper valve to the upper piston of the brake master valve.

5. The regulating device for the brake master valve is characterized in that: include: The first servo mechanism is used to generate a first force after being activated, and before the switch seat of the brake master valve is pushed, the first force is used to push the upper piston of the brake master valve so that the upper piston reaches a critical position; A displacement sensor, used for detecting displacement data of an upper piston pushed by a first force; The second servo mechanism is used to generate a second force after being activated, and use the second force to push the switch seat of the brake master valve; The control mechanism is electrically connected to the first servo mechanism, the second servo mechanism, the displacement sensor and the micro switch, respectively, and is used to receive displacement data, and determine whether the upper piston has reached the critical position based on the displacement data, and to start the first servo mechanism. When the upper piston reaches the critical position, the first servo mechanism is stopped, so that the first force is terminated. It is also used to start the second servo mechanism after the upper piston reaches the critical position, and to detect whether the on-off state of the micro switch has changed, and when the on-off state of the micro switch has changed, the second servo mechanism is stopped, so that the second force is terminated.

6. The regulating device for the brake master valve according to claim 5, characterized in that: It also includes a bottom plate, a guide rod seat, a support, a positioning seat, and a displacement sensor seat, wherein the support, the positioning seat, and the displacement sensor seat are respectively arranged on the bottom plate; The first servo mechanism comprises a first servo electric cylinder, the first servo electric cylinder has a first output shaft, the first output shaft is limited to move in a straight line direction, a first connecting rod, a pressure sensor for obtaining pressure data, a connecting seat, a second connecting rod, a flexible connector and a push rod are sequentially connected to the output shaft, the first connecting rod is coaxially connected to the first output shaft and the pressure sensor respectively, the pressure sensor is limited between the first connecting rod and the second connecting rod, the second connecting rod is connected to the push rod through a flexible connector, the connecting seat is connected to the guide rod seat, the second connecting rod forms a sliding pair with the connecting seat and the guide rod seat respectively, the pressure sensor is limited between the guide rod seat and the first connecting rod, the first servo electric cylinder is arranged on the support, the guide rod seat and the support form a sliding pair through the guide rod, and the displacement sensor is arranged on the displacement sensor seat; The second servo mechanism includes a second servo electric cylinder and a reciprocating assembly, the second servo electric cylinder has a second output shaft, the reciprocating assembly includes a push rod, a push rod seat, a coil spring, a pin shaft and a shift block, the two ends of the push rod are a head end and a tail end respectively, the head end forms a hinge structure with the shift block through the pin shaft, the tail end is provided with a blocking ring for blocking the coil spring, the push rod and the push rod seat form a sliding pair, the coil spring is sleeved on the push rod, the coil spring is restricted between the push rod seat and the blocking ring, the second output shaft and the push rod are configured to be coaxial, the second servo electric cylinder is arranged on the support, and the second servo electric cylinder is located above the first servo electric cylinder.

7. The regulating device for the brake master valve according to claim 6, characterized in that: Also includes: A first positioning mechanism is used to position the valve assembly of the brake master valve before generating the first force, so that the brake master valve is restricted to an immobile state; The second positioning mechanism is used to position the switch seat and the micro switch of the brake master valve after the valve assembly is positioned, so that the movement paths of the switch seat and the micro switch relative to the valve assembly are respectively limited to linear movement paths, and the linear movement path is limited to the direction from the upper piston of the brake master valve to the upper valve; The first positioning mechanism and the second positioning mechanism are electrically connected to the control mechanism respectively.

8. The regulating device for the brake master valve according to claim 7, characterized in that: The first positioning mechanism comprises a first cylinder and a pressure block, the piston shaft of the first cylinder is connected to the pressure block, the first cylinder is arranged on the base plate through a mounting bracket, and a positioning area for positioning the main brake valve is formed between the pressure block and the positioning seat; The second positioning mechanism includes two groups of positioning components, and each group of positioning components is respectively provided with a second cylinder, a shift fork, a pressure plate support and a pressure plate, the second cylinder is arranged on the base plate, the piston shaft of the second cylinder is coaxially connected with the shift fork, the axis center line of the piston shaft of the second cylinder is perpendicular to the plate surface relative to the base plate, the pressure plate is provided with a first section, a second section and a third section, the second section is located between the first section and the third section, the first section is used to contact the switch seat on the brake main valve, the second section is hinged to the pressure plate support, the pressure plate support is arranged on the base plate, the third section is provided with a slide groove, the slide groove is hinged to the shift fork, and the spacing between the first sections of the two pressure plates is greater than the spacing between the third sections of the two pressure plates.

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