CN111674375A

CN111674375A - Automatic control device of pneumatic brake

Info

Publication number: CN111674375A
Application number: CN202010456869.2A
Authority: CN
Inventors: 战洪波; 周玲玲; 许翊像
Original assignee: China MCC17 Group Co Ltd
Current assignee: China MCC17 Group Co Ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2020-09-18
Anticipated expiration: 2040-05-26
Also published as: CN111674375B

Abstract

The invention provides an automatic control device of an air brake, which comprises an air chamber assembly, a control valve with a plurality of holes, a brake master cylinder for adjusting air pressure and a transmission mechanism which is connected with the air chamber assembly, the control valve with a plurality of holes, the brake master cylinder and the transmission mechanism; the control valve comprises a valve core with a left-large right-small multi-step section and a valve body shell which slides and rotates with the surface of the valve core; different through holes are formed in the center of the valve core, the valve core and the valve body shell rotate mutually to be connected with holes at different positions to form different connecting paths; the automatic control device of the pneumatic brake provided by the invention has the advantages of reasonable structure, convenience in installation, strong universality and safety and reliability in use, and has multiple functions when being applied to various gas brake braking systems of various mechanical equipment.

Description

Automatic control device of pneumatic brake

Technical Field

The invention belongs to engineering electromechanical installation equipment, and particularly relates to an automatic control device of a pneumatic brake.

Background

At present, the engineering construction machinery and electrical installation equipment, transportation equipment, agricultural machinery equipment, mineral machinery equipment, air transportation equipment and the like are used. In particular, in the zero-hour parking problem, the conventional measures are usually to solve the parking problem by pulling up the hand brake after parking, and the method has many problems which cannot be solved.

1) When parking is particularly needed, the user is easy to forget to brake the handle by hands.

2) The parking place is usually uneven on the ground, and the operator is easy to automatically walk after walking on the slope or the downhill, so that unnecessary damage accidents are caused.

3) Newborn babies are prone to stepping wrong pedals leading to life and construct damage.

4) The new-born uphill is difficult to start, easy to stop, flameout and retreat, and the examination is not passed, thus wasting time.

5) The accelerator is easy to be stepped on to cause an accident of galloping.

6) The complicated hand braking system has high manufacturing cost and high maintenance cost due to easy damage.

7) The operation is complicated and cumbersome, and the operation is difficult and not light.

8) The equipment rush-repair installation process is long in time and high in labor intensity.

In summary, the prior art has not yet solved the above-mentioned problems.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: the convenient braking problem of the automobile.

In order to solve the problems in the prior art, the invention provides an automatic control device for air braking, which comprises an air chamber assembly, a control valve, a brake master cylinder and a transmission mechanism, wherein the control valve comprises a valve core and a valve body shell rotationally connected with the valve core;

the center of the valve core is respectively provided with a left main hole and a right main hole, the left side end of the left main hole is respectively provided with a counter bore a and a counter bore b which is symmetrical along the radial direction of the valve core, the inside of the valve core is provided with a hole c which is respectively communicated with the counter bore a and the counter bore b, a hole f is arranged above the left main hole, a ventilation groove M is arranged above the hole f, a hole g is arranged below the left main hole, the end part of the hole g is provided with a ventilation groove N, and a hole h which is communicated with the right main hole is arranged inside the valve core;

the valve body shell is provided with a hole e and a hole k in the vertical direction, the hole e is communicated with the hole h, a ventilation groove M is arranged above the hole f, a hole g communicated with the left main hole is arranged below the ventilation groove M, a ventilation groove N is arranged on the surface of one end of the hole g, a hole w is arranged on one side, close to the valve core, of the hole e, a hole z is arranged on one side, close to the valve core, of the hole k, and the hole w and the hole z are transition holes.

Specifically, the vent grooves M, N, and g are located inside the valve core, and the holes k and e are located inside the valve body case, respectively.

Preferably, the air chamber assembly includes the welded seat, the inboard of welded seat is equipped with the air chamber, sliding connection has two-way slide bar on the welded seat, left air chamber and right air chamber are separated into with the air chamber to two-way slide bar, two-way slide bar is connected with the control valve, two-way slide bar's center department is equipped with the return spring holder, be equipped with return spring on the return spring holder, the catch bar is installed at return spring holder center department, the catch bar can be dismantled and be connected with the brake master cylinder.

Specifically, the left air chamber and the right air chamber after ventilation have pressure difference, and compared with the elastic force of a spring, a phase difference force is generated, so that the left movement and the right movement of the push rod are realized; the bidirectional slide rod is respectively connected with a counter bore a and a counter bore b on the control valve, and the bidirectional slide rod is provided with a vent hole which leads to the left air chamber and the right air chamber.

Preferably, the control valve further comprises a fixing plate fixedly connected with the valve body shell, an accelerator plate fixedly connected with the fixing plate, and a supporting seat fixedly connected with the valve core, wherein the accelerator plate is provided with a mounting hole, and the accelerator plate is fixedly connected with the valve body shell through the mounting hole. Specifically, the throttle plate rotates along with the rotation of the valve body shell, the supporting seat can be fixed on the vehicle body, and the supporting seat fixes the whole control valve.

Preferably, the transmission mechanism comprises a ratchet wheel, a pawl used for meshing with the ratchet wheel, a hand braking plate and a compression screw used for fixing the ratchet wheel, wherein the hand braking plate is arranged below the pawl and fixedly connected with the pawl, a pull rod is arranged below the hand braking plate, one end of the push rod is in contact with the pawl, and the pawl is matched with the ratchet wheel.

Specifically, the pull rod is equivalent to a hand brake, a hand brake plate is connected with a brake disc on the transmission shaft, and the brake disc is connected with a friction plate, so that the brake plate has a brake effect on each wheel; the ratchet and pawl structure is set, so that the left and right unidirectional motion capability is realized.

Preferably, the transmission mechanism further comprises a pulling sleeve arranged on the other side of the pushing rod, an adjusting screw is arranged at one end, close to the ratchet, of the pulling sleeve, a hole arm plate is arranged at one end, far away from the ratchet, of the pulling sleeve, the hole arm plate is rotatably connected with the cam, one end, far away from the ratchet, of the pushing rod is fixedly connected with the pulling sleeve, and the hole arm plate is rotatably connected with the pulling sleeve;

specifically, the right-hand member processing of catch bar has the breach, and the shape of breach is the sword mouth shape of upper left, is equipped with the pulling cover of bulb round pin on the left side of catch bar, the downside of orifice arm board has the hole, and the orifice arm board rotates with the cam to be connected, the upside and the bulb round pin of orifice arm board become sliding fit, and the orifice arm board rotates with the pulling cover to be connected.

Preferably, a control valve core and a pneumatic master control valve are arranged on the master cylinder, the upper surface of the control valve core is in contact with the cam, a support is arranged on the master cylinder, the pneumatic master control valve is arranged on the upper side of the master cylinder, an air storage chamber is arranged on one side of the pneumatic master control valve, and a high-pressure pipe is arranged on the other side of the pneumatic master control valve;

specifically, the high-pressure pipe is connected with an external front brake main pipe, the front brake main pipe is connected with friction plates on corresponding hubs to perform friction deceleration, the lower end of the air pressure master control valve is also connected with a rear brake main pipe, and the rear brake main pipe is connected with the friction plates on the corresponding hubs to perform friction deceleration; the cam and the hole arm plate can be in splined connection, the cam is abutted against the control valve core, and the cam rotates along with the up-and-down movement of the control valve core; the air storage chamber supplies air to the brake master cylinder.

Preferably, a main pedal is arranged at the bottom of the accelerator pedal plate and fixedly connected with the valve body shell, an additional pedal is arranged on the accelerator pedal plate and positioned above the main pedal, and a pull rod is arranged at the lower side of the accelerator pedal plate and fixedly connected with the hand brake plate;

specifically, the main pedal is an accelerator pedal and is connected with an accelerator, the main pedal is fixedly connected with an accelerator plate, and the valve body shell generates a rotating effect along with the rotation of the main pedal; the additional pedal is an auxiliary brake pedal, the auxiliary brake pedal can be used when a vehicle is parked on a slope, and the pull rod is a hand brake and is fixedly connected with the hand brake plate to achieve a brake effect.

Preferably, the transmission mechanism further comprises a vent hose, the valve core is provided with a through connector, the through connector is respectively installed at the left end of the counter bore a, the left end of the counter bore b and the right end of the right main hole, the vent hose is screwed on the through connector, the bidirectional slide rod is connected with one end of the vent hose, the other end of the vent hose is connected with the through connector, a plug is installed above the hole c, and the plug is respectively installed at the left ends of the hole e and the hole k.

Specifically, the whole pneumatic brake has the effect only by connecting the air hoses, one end of one air hose is connected with a counter bore a on the control valve, the other end of the air hose is connected with the left air chamber, one end of the air hose is connected with a counter bore b on the control valve, and the other end of the air hose is connected with the right air chamber; and the hole c ensures air tightness, the two ends of the hole c are plugged by plugs, and similarly, the left ends of the hole e and the hole k are plugged by plugs because the valve body shell and the valve core rotate.

Preferably, the hand brake plate is provided with a pin, the pawl is provided with a through hole, the pin penetrates through the through hole, the pawl is provided with a return spring, and the ratchet wheel and the hand brake plate are respectively and fixedly connected with the valve core.

Preferably, the lower side of the welding seat is provided with a bracket which is fixedly connected with a vehicle body plate, and the vehicle body plate is fixedly connected with the supporting seat.

Specifically, the body panel serves to fixedly connect the control valve and the air chamber assembly.

Connecting pipelines:

1. one end of a hose is connected with a left straight joint (a left air chamber) of the air chamber assembly, and the other end is connected with an upper straight joint (a counter bore a) of the control valve.

2. One end of a hose is connected with a right straight joint (a right air chamber) of the air chamber assembly, and the other end of the hose is connected with a lower straight joint (a counter bore b) of the control valve.

3. A high-pressure pipe is connected with an air pipe of the air storage chamber at one end, and an air inlet connector is connected with an air pressure master control valve at one end.

4. One end of a hose is connected with a joint on an air outlet pipe of the air pressure master control valve, and the other end of the hose is communicated with a front brake main pipe.

5. One end of a hose is connected with a connector on an air outlet pipe of the air pressure master control valve, and the other end of the hose is communicated with a rear brake main pipe.

6. One end of a hose is connected with a pipe inlet joint of the engine, and the other end is connected with a right straight joint of the control valve.

Has the advantages that:

1. compared with the prior art, the invention realizes different trends by arranging the valve core and the valve body shell which is rotationally connected, wherein holes with different paths are arranged, and the angles in connection are different, such as 3 degrees, 54 degrees and 71 degrees, thereby playing different braking effects.

2. Compared with the prior art, the bidirectional sliding rod brake device has the advantages that the bidirectional sliding rod reciprocates and the return spring is pulled to generate transverse forces in different directions in different states, so that different braking conditions of an automobile are realized.

3. Compared with the prior art, the invention is provided with the supporting seat for fixing the control valve, thereby realizing the stability of the fixed installation of the control valve.

4. Compared with the prior art, the invention is provided with the ratchet wheel and pawl structure to realize intermittent unidirectional motion, so that the brake switching can be realized.

5. Compared with the prior art, the invention is provided with the cam rocker mechanism to realize reciprocating transverse motion.

6. Compared with the prior art, the pneumatic conveying device has the advantages that the related structure of the master cylinder is additionally arranged, and pneumatic conveying and reciprocating up-and-down movement are realized.

7. Compared with the prior art, the invention is additionally provided with the main pedal and the additional pedal, and the main pedal is fixedly connected with the control valve, thereby realizing different angles and generating different effects.

8. Compared with the prior art, the invention is pneumatically connected with the control valve, thereby realizing the control of the control valve when the engine is in a continuous working state.

9. Compared with the prior art, the air chamber assembly is connected with the control valve through the ventilation hose, so that the control valve can control the air chamber assembly.

10. Compared with the prior art, the connection between the automobile body plate and the supporting seat is enhanced, and the connectivity is enhanced.

Drawings

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is an overall schematic view of the present invention;

FIG. 2 is a schematic cross-sectional view of the control valve of the present invention;

FIG. 3 is a schematic front view of the working angle position of the present invention;

FIG. 4 is a schematic structural view of the present invention;

FIG. 5 is a partial schematic view of the ratchet pawl of the present invention.

Specifically, in the figure: 1. the pneumatic master cylinder comprises a pneumatic master cylinder body, 2, a control valve, 3, a master brake pump, 4, a valve core, 5, a valve body shell, 6, a push rod, 7, a return spring, 8, a bracket, 9, a hand brake plate, 10, a plug, 11, a through joint, 12, a welding seat, 13, a two-way sliding rod, 14, a fixing plate, 15, an accelerator plate, 16, a supporting seat, 17, a compression screw, 18, a pull rod, 19, a ratchet wheel, 20, a pawl, 21, an air storage chamber, 22, a pneumatic master control valve, 23, a pulling sleeve 24, an adjusting screw 25, a hole arm plate 26, a return spring seat 27, a support 28, a high-pressure pipe 29, a control valve core 30, a cam 31, a vehicle body plate 32, an additional pedal 33 and a main pedal.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The application of the principles of the present invention will be further described with reference to the accompanying drawings and specific embodiments.

Example 1

Referring to fig. 1 to 5, an automatic control device for air braking comprises an air chamber assembly 1, a control valve 2, a master cylinder 3 and a transmission mechanism, wherein the control valve 2 comprises a valve core 4 and a valve body shell 5 rotationally connected with the valve core 4; the valve body shell is characterized in that the surface of the valve body shell with the inner diameter size needs to be subjected to finish machining and is connected with a valve core in a rotating mode, a left main hole and a right main hole are respectively formed in the center of the valve core 4, a counter bore a and a counter bore b which are axially symmetrical along the valve core 4 are respectively formed in the left side end of the left main hole, a hole c which is communicated with the counter bore a and the counter bore b is formed in the valve core 4, a plug 10 is arranged above the hole c, a hole f is formed above the left main hole, a ventilation groove M with an arc angle of 56 degrees is formed in the left-rotating direction of the hole f, a hole g is formed in the horizontal lower portion 33 degrees below the left main hole, a ventilation groove N with an arc angle of 63 degrees is formed in the end portion opposite to 67;

the valve body shell 5 is respectively provided with a hole e and a hole k in the vertical direction, the hole e is communicated with the hole h, the plug 10 is arranged at the left end of the hole e, and two sides of the valve core 4 are respectively and fixedly connected with supporting seats 16;

a ventilation groove M is arranged above the hole f, a hole g communicated with the left main hole is arranged below the ventilation groove M, a ventilation groove N is formed in the surface of one end of the hole g, a hole w is formed in one side, close to the valve core 4, of the hole e, and a hole z is formed in one side, close to the valve core 4, of the hole k;

the vent grooves M, N, and g are located inside the valve core 4, and the holes k and e are located inside the valve body case 5, respectively.

Air chamber assembly 1 includes welded seat 12, the inboard of welded seat 12 is equipped with the air chamber, sliding connection has two-way slide bar 13 on welded seat 12, two-way slide bar 13 separates into left air chamber and right air chamber with the air chamber, be equipped with the air vent on the two-way slide bar 13, the center department of two-way slide bar 13 is equipped with return spring holder 26, install return spring 7 on the return spring holder 26, catch bar 6 is installed to return spring holder 12 center department, catch bar 6 can dismantle with brake master cylinder 3 and be connected.

The control valve 2 further comprises a fixing plate 14 fixedly connected with the valve body shell 5, an accelerator plate 15 fixedly connected with the fixing plate 14, and a supporting seat 16 fixedly connected with the valve core 4, wherein the accelerator plate 15 is provided with a mounting hole, and the accelerator plate 15 is fixedly connected with the valve body shell 5 through the mounting hole.

The transmission mechanism comprises a ratchet wheel 19, a pawl 20 used for meshing the ratchet wheel 19, a hand braking plate 9 and a compression screw 17 used for fixing the ratchet wheel 19, wherein the hand braking plate 9 is positioned on the lower side of the pawl 20, the hand braking plate 9 is fixedly connected with the pawl 20, a pull rod 18 is arranged below the hand braking plate 9, one end of a push rod 6 is in contact with the pawl 20, the pawl 20 is matched with the ratchet wheel 19, and a pawl return spring is further arranged on the pawl 20.

The transmission mechanism further comprises a pulling sleeve 23 arranged on the other side of the push rod 6, an adjusting screw 24 is arranged at one end, close to the ratchet wheel 19, of the pulling sleeve 23, a hole arm plate 25 is arranged at one end, far away from the ratchet wheel 19, of the pulling sleeve 23, the hole arm plate 25 is rotatably connected with the cam 30, one end, far away from the ratchet wheel 19, of the push rod 6 is fixedly connected with the pulling sleeve 23, and the hole arm plate 25 is rotatably connected with the pulling sleeve 23.

Be equipped with control valve core 29 and pneumatic master control valve 22 on master cylinder 3, the upper surface and the cam 30 contact of control valve core 29, install support 27 on master cylinder 3, gas receiver 34 is installed to one side of pneumatic master control valve 22, high-pressure pipe 28 is installed to pneumatic master control valve 22, gas receiver 34 is connected to high-pressure pipe 28, store up gas through gas receiver 34, before the air hose 21 is connected, back brake house steward, connect the brake disc on the wheel, the friction disc on the brake disc carries out the friction.

The bottom of the accelerator plate 15 is provided with a main pedal 33, the accelerator plate 15 is fixedly connected with the valve body shell 5, the accelerator plate 15 is provided with an additional pedal 32, the additional pedal 32 is positioned above the main pedal 33, the lower side of the accelerator plate 15 is provided with a pull rod 18, and the pull rod 18 is fixedly connected with the hand brake plate 9.

The transmission mechanism further comprises a ventilation hose, a straight-through joint 11 is arranged on the valve core 4, the straight-through joint 11 is respectively installed at the left end of the counter bore a, the left end of the counter bore b and the right end of the right main hole, the ventilation hose is screwed on the straight-through joint 11, one end of the ventilation hose is connected to the bidirectional slide rod 13, the straight-through joint 11 is arranged at the other end of the ventilation hose, plugs 10 are installed at two ends of the hole c, and the plugs 10 are respectively installed at the left ends of the hole e and the hole k.

The hand brake plate 9 is provided with a pin, the pawl 20 is provided with a through hole, the pin penetrates through the through hole, the pawl 20 is provided with a return spring, and the ratchet wheel 19 and the hand brake plate 9 are respectively and fixedly connected with the valve core 4.

The bracket 8 is installed on the lower side of the welding seat 12, the body plate 31 is fixedly connected to the bracket 8, and the body plate 31 is fixedly connected with the supporting seat 16.

The main working principle is as follows:

the brake device has the advantages that the brake effect comprises two parts, the hand brake plate 9 is connected with a brake disc on the transmission shaft, the brake disc is connected with a friction plate, and the friction plate plays a role in braking; the air pressure master control valve is connected with the ventilation hose and the front and rear brake master pumps, and the front and rear brake master pumps are connected with the corresponding friction plates on the wheel hubs, so that the braking effect is achieved.

When the engine is shut down, no vacuum pressure exists in the vacuum chamber, the master cylinder 3 drives the control valve core 29 to move upwards, the push rod 6 moves rightwards through the hole arm plate 25, the pawl 20 clamps the main ratchet wheel 19 to move rightwards, the pull rod 18 moves leftwards, and the hand brake plate 9 plays a braking role, so that the friction plates on the brake disc are pushed by the air pressure, and the friction plates act on the brake disc to generate the whole-vehicle braking.

When the engine is in a small idling state, the vacuum of an air inlet pipe of the engine is small, the pressure of a vacuum air chamber is small (the right side is larger than the left side), the vacuum pressure is smaller than the reset force of a return spring, the push rod 6 gradually moves to the left side, and the pawl 20 gradually moves; when the engine runs at a high idle speed, the vacuum force is increased, negative pressure is generated in the channels h and e, the push rod 6 moves leftwards, the control valve core 29 moves downwards, and the braking release critical point is reached; meanwhile, the pull rod 18 is rightward, the hand brake plate 9 releases the critical point of the brake disc, and the automobile still belongs to the braking process and reaches the braking critical point.

When the main pedal 33 acts for more than 3 degrees, the channel h-e-f-c-a in the valve body shell 5 generates larger negative pressure and is connected to the right air chamber through the air pipe to generate air pressure, the return spring 7 pushes the push rod 6 to the right under the action of the air pressure, the control valve core 29 is downward, the brake master cylinder 3 releases the brake, and the normal running operation is realized.

When the main pedal 33 acts at a temperature higher than 54 degrees, negative pressure is generated in each channel in the valve body, the left pressure and the right pressure in the left air chamber and the right air chamber are equal, but under the reset action of the return spring 7, the cam 30 rotates, the control valve core 29 faces downwards, the brake master cylinder 3 generates braking, each wheel brake system generates braking, the running speed is reduced or lowered, and accidents are automatically prevented.

When the action of the main pedal 33 is greater than 71 degrees, the left air chamber generates vacuum force and the cam 30 of the brake master cylinder 3 rotates in a tightening direction, the push rod 6 moves rightwards, the pawl 20 is clamped with the main ratchet wheel 19, the pull rod 18 moves leftwards, the hand brake plate 9 generates a braking effect, and the whole vehicle is forced to brake and stall.

When the vehicle stops at a large slope, the additional pedal 32 can be used for stepping on the boost brake, and when the brake needs to be released, the back of the foot can be used for acting upwards to loosen the brake.

The main technical requirements;

1, the contact area between the friction plate and the friction disc is more than 80 percent.

2, the return spring force of the main return spring is ensured to push the hand brake plate 9 under normal absence of vacuum force.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a pneumatic braking automatic control device, includes by air chamber assembly (1), control valve (2), master cylinder (3) and drive mechanism, its characterized in that: the control valve (2) comprises a valve core (4) and a valve body shell (5) which is rotationally connected with the valve core (4);

a left main hole and a right main hole are respectively arranged at the center of the valve core (4), a counter bore a and counter bores b which are symmetrical along the radial direction of the valve core (4) are respectively arranged at the left side end of the left main hole, a hole c which is communicated with the counter bore a and the counter bore b is respectively arranged in the valve core (4), a hole f is arranged above the left main hole, a ventilation groove M is arranged above the hole f, a hole g is arranged below the left main hole, a ventilation groove N is arranged at the end part of the hole g, and a hole h which is communicated with the right main hole is arranged in the valve core (4);

the valve body shell (5) is provided with a hole e and a hole k respectively, the hole e is communicated with the hole h, a ventilation groove M is arranged above the hole f, a hole g communicated with the left main hole is arranged below the ventilation groove M, a ventilation groove N is arranged on the surface of one end of the hole g, a hole w is arranged on one side, close to the valve core (4), of the hole e, and a hole z is arranged on one side, close to the valve core (4), of the hole k.

2. An automatic control device for pneumatic brake according to claim 1, characterized in that: air chamber assembly (1) is including welding seat (12), the inboard of welding seat (12) is equipped with the air chamber, sliding connection has two-way slide bar (13) on welding seat (12), left air chamber and right air chamber are separated into with the air chamber in two-way slide bar (13), two-way slide bar (13) are connected with control valve (2), the center department of two-way slide bar (13) is equipped with return spring holder (26), install return spring (7) on return spring holder (26), catch bar (6) are installed to return spring holder (12) center department, catch bar (6) can be dismantled with brake master cylinder (3) and be connected.

3. An automatic control device for pneumatic brake according to claim 1, characterized in that: the control valve (2) further comprises a fixing plate (14) fixedly connected with the valve body shell (5), an accelerator plate (15) fixedly connected with the fixing plate (14), and a supporting seat (16) fixedly connected with the valve core (4), wherein a mounting hole is formed in the accelerator plate (15), and the accelerator plate (15) is fixedly connected with the valve body shell (5).

4. An automatic control device for pneumatic brake according to claim 2, characterized in that: the transmission mechanism comprises a ratchet wheel (19), a pawl (20) used for meshing the ratchet wheel (19), a hand braking plate (9) and a compression screw (17) used for fixing the ratchet wheel (19) are arranged below the pawl (20), the hand braking plate (9) is fixedly connected with the pawl (20), a pull rod (18) is arranged below the hand braking plate (9), one end of a push rod (6) is in contact with the pawl (20), and the pawl (20) is matched with the ratchet wheel (19).

5. An automatic control device for pneumatic brake according to claim 4, characterized in that: drive mechanism still installs pulling cover (23) including being located catch bar (6) opposite side, adjusting screw (24) are installed to the one end that pulling cover (23) are close to ratchet (19), hole arm board (25) are installed to the one end that ratchet (19) were kept away from in pulling cover (23), hole arm board (25) rotate cam (30) of connecting, the one end and the pulling cover (23) fixed connection of ratchet (19) are kept away from in catch bar (6), hole arm board (25) are connected with pulling cover (23) rotation.

6. An automatic control device for pneumatic brake according to claim 5, characterized in that: be equipped with control valve core (29) and air pressure master control valve (22) on master cylinder (3), the upper surface and cam (30) contact of control valve core (29), install support (27) on master cylinder (3), air receiver (34) are installed to one side of air pressure master control valve (22), install high-pressure pipe (28) of air pressure master control valve (22), air receiver (34) are connected in high-pressure pipe (28).

7. A pneumatic brake automatic control device according to claim 3, characterized in that: main footboard (33) are installed to the bottom of throttle plate (15), throttle plate (15) and valve body shell (5) fixed connection, install additional footboard (32) on throttle plate (15), additional footboard (32) are located the top of main footboard (33), the downside at throttle plate (15) is installed in pull rod (18), pull rod (18) and hand brake board (9) fixed connection.

8. An automatic control device for pneumatic brake according to claim 2, characterized in that: the transmission mechanism further comprises a ventilation hose, a through joint (11) is arranged on the valve core (4), the through joint (11) is respectively installed at the left end of the counter bore a, the left end of the counter bore b and the right end of the right main hole, the ventilation hose is screwed on the through joint (11), one end of the ventilation hose is connected to the bidirectional sliding rod (13), the other end of the ventilation hose is connected to the through joint (11), plugs (10) are installed at two ends of the hole c, and the plugs (10) are respectively installed at the left ends of the hole e and the hole k.

9. An automatic control device for pneumatic brake according to claim 4, characterized in that: the manual brake device is characterized in that a pin is installed on the manual brake plate (9), a through hole is formed in the pawl (20), the pin penetrates through the through hole, a return spring is installed on the pawl (20), and the ratchet wheel (19) and the manual brake plate (9) are fixedly connected with the valve core (4) respectively.

10. A pneumatic brake automatic control device according to claim 3, characterized in that: bracket (8) are installed to the downside of welding seat (12), bracket (8) fixedly connected with automobile body board (31), automobile body board (31) and supporting seat (16) fixed connection.