CN211288856U

CN211288856U - Soft brake valve

Info

Publication number: CN211288856U
Application number: CN201921947221.4U
Authority: CN
Inventors: 张俊强
Original assignee: Hunan Bobang Heavy Industry Co ltd
Current assignee: Hunan Bobang Heavy Industry Co ltd
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2020-08-18
Anticipated expiration: 2029-11-12

Abstract

The utility model discloses a soft brake valve, which is provided with a first air inlet and a first air outlet on an upper valve seat, a push rod is in sealing fit with an inner cavity at the upper end of the upper valve seat, a first valve body is in sealing fit with an inner cavity at the lower end of the upper valve seat, a second valve body is positioned in the inner cavity of the first valve body, a central rod is connected with the second valve body, and a central through hole is arranged in the central rod; the two ends of the first spring are respectively abutted against the upper valve seat and the first valve body, a push rod is arranged in an inner cavity of the upper valve seat and moves up and down, and a first valve body is arranged in an inner cavity of the upper valve seat and moves up and down. The utility model discloses can realize soft braking, vary voltage braking, braking effect is good.

Description

Soft brake valve

Technical Field

The utility model relates to the field of machinary, in particular to soft brake valve.

Background

At present, the brake valve brakes violently and softly in the use process, and the brake valve is locked by lightly stopping, so that the brake and the tire are damaged by hemp, the service lives of a brake pad and the tire are shortened, the oil consumption is increased, the automobile is easy to sideslip and swing when braking on a rain and snow road surface, the brake force is insufficient when the automobile is heavily loaded, the brake is easy to fail, the defects cause great psychological burden and economic loss for a driver, and traffic accidents are likely to be caused.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a soft brake valve realizes soft braking, vary voltage braking, can gently press the brake and do not lock.

On one hand, the utility model provides a soft brake valve, set up first air inlet and first gas outlet at the upper valve seat, the push rod cooperates with the upper end inner chamber of the upper valve seat in a sealing way, the first valve body cooperates with the lower end inner chamber of the upper valve seat in a sealing way, the second valve body locates in the first valve body inner chamber, the central core rod is connected with the second valve body, set up the central through hole in the central core rod; the two ends of the first spring are respectively abutted against the upper valve seat and the first valve body, a push rod is arranged in an inner cavity of the upper valve seat and moves up and down, and a first valve body is arranged in an inner cavity of the upper valve seat and moves up and down.

Furthermore, when the upper end face of the second valve body is pressed against the step face of the first valve body to form a first plane sealing surface, the first plane sealing surface divides the inner cavity of the upper valve seat into a first sealing cavity and a second sealing cavity, the first valve body moves up and down under the pressure difference action of the first sealing cavity and the second sealing cavity, the first air inlet is communicated with the first sealing cavity, and the second air outlet is communicated with the second sealing cavity; when the push rod overcomes the pressure of the second sealing cavity to push the first plane sealing surface downwards, the first sealing cavity is communicated with the second sealing cavity.

Furthermore, the second sealing cavity is communicated with the central through hole, and when the push rod overcomes the pressure of the second sealing cavity and downwards abuts against the upper end face of the second valve body to form a second plane sealing surface, a channel between the second sealing cavity and the central through hole is disconnected.

Further, including second spring and second sliding sleeve, the second sliding sleeve cooperates with first valve body inner chamber, and the cooperation of second valve body and second sliding sleeve inner chamber, second spring both ends support respectively and press on first valve body and second valve body, and second valve body upper end supports under the second spring action and presses and form first plane sealing face on first valve body platform step face.

Furthermore, a first vent hole is formed in the second sliding sleeve.

Furthermore, a first step for limiting the lower end of the push rod and a second step for limiting the upper end of the first valve body are arranged in the inner cavity of the upper valve seat, and two ends of the first spring are respectively abutted against the first step of the upper valve seat and the step surface of the first valve body; the first valve body is positioned below the second step, the second vent hole is formed in the upper end of the first valve body, and the third vent hole is formed in the lower end of the second valve body.

Furthermore, a first stop piece used for limiting the upper end of the push rod is arranged in the inner cavity of the upper valve seat, a second stop piece used for limiting the lower end of the second sliding sleeve is arranged in the inner cavity of the first valve body, a first sealing ring is arranged between the push rod and the sealing matching surface of the upper valve seat, a second sealing ring is arranged between the first valve body and the sealing matching surface of the upper valve seat, and a third sealing ring is arranged between the second valve body and the sealing matching surface of the middle rod.

The lower valve seat is arranged below the upper valve seat, the exhaust seat is arranged below the lower valve seat, the lower end of the central rod is in sealing fit with the lower valve seat, the third valve body is arranged in an inner cavity of the lower valve seat, two ends of the third spring are respectively abutted between the exhaust seat and the third valve body, and the third valve body is abutted against the lower valve seat under the action of the elastic force of the third spring to form a third plane sealing surface; an exhaust port is formed in the exhaust seat, and a second air inlet and a second air outlet are formed in the lower valve seat; the central through hole is communicated with the second air outlet and the exhaust port, and is disconnected with the second air outlet when the central rod is pressed downwards against the upper end face of the third valve body to form a fourth plane sealing surface; when the central rod pushes the third plane sealing surface downwards, the second air inlet is communicated with the second air outlet.

Furthermore, the lower valve seat is connected with the upper valve seat through threads, a fourth sealing ring is arranged on the matching end face of the upper valve seat and the lower valve seat, the exhaust seat is connected with the lower valve seat through threads, a fifth sealing ring is arranged on the matching end face of the exhaust seat and the lower valve seat, a sixth sealing ring is arranged between the third valve body and the matching face of the exhaust seat, and a seventh sealing ring is arranged between the central rod and the matching face of the lower valve seat.

Further, the pedal comprises a pedal, a pedal seat, a tappet and a first sliding sleeve; the footboard is articulated with the pedal seat, goes up the disk seat and is connected with the pedal seat, and first sliding sleeve inlays on the pedal seat, tappet and the cooperation of first sliding sleeve, and the footboard is pressed in the tappet upper end, and the tappet lower extreme is pressed in the push rod upper end.

The utility model discloses a soft brake valve compares prior art beneficial effect and lies in:

when the push rod overcomes the pressure of the second sealing cavity and pushes the first plane sealing surface downwards, the first sealing cavity is communicated with the second sealing cavity, the pressure of the second sealing cavity is increased, the first valve body moves downwards for a certain distance under the action of the pressure of the second sealing cavity to achieve new balance, and the first plane sealing is closed again. The first valve body moves up and down by means of the pressure difference between the first sealing cavity and the second sealing cavity, so that the pressure of the second sealing cavity is controllable, soft braking and variable-pressure braking are realized, and the brake can be lightly applied without locking.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

FIG. 1 is a schematic structural view of a soft brake valve in a first-stage closed state and a second-stage closed state;

FIG. 2 is a schematic structural view of the soft brake valve in the first-stage half-open and second-stage closed states of the present invention;

FIG. 3 is a schematic structural view of the soft brake valve in the first stage fully open and the second stage closed states according to the present invention;

fig. 4 is a schematic structural view of the soft brake valve in the first stage fully open state and the second stage fully open state.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1, the utility model provides a soft brake valve, which comprises a pedal 1, a pedal seat 3, a tappet 2 and a first sliding sleeve 13; footboard 1 is articulated with footboard seat 3, goes up disk seat 29 and passes through bolt or threaded connection with footboard seat 3, and first sliding sleeve 13 inlays on footboard seat 3, tappet 2 and the cooperation of first sliding sleeve 13, and tappet 2 can slide from top to bottom, and footboard 1 is pressed in tappet 2 upper end, and tappet 2 lower extreme is pressed in push rod 4 upper end. When the driver steps on the pedal 1, the tappet 2 slides down, pushing the push rod 4 to slide down.

The lower valve seat 9 is mounted below the upper valve seat 29, the exhaust seat 12 is mounted below the lower valve seat 9, the lower valve seat 9 is in threaded connection with the upper valve seat 29, the exhaust seat 12 is in threaded connection with the lower valve seat 9, the upper valve seat 29 is provided with a first air inlet A1 and a first air outlet B1, the exhaust seat 12 is provided with an exhaust port T, and the lower valve seat 9 is provided with a second air inlet A2 and a second air outlet B2. The first air inlet A1 and the second air inlet A2 are connected with an air inlet pipeline, the first air outlet B1 is connected with a first brake, the second air outlet B2 is connected with a second brake, and the air outlet T is communicated with the atmosphere.

A first sealing ring 20 (shown in figure 3) is arranged between the push rod 4 and the sealing matching surface of the upper valve seat 29, and the push rod 4 is in sealing matching with the inner cavity at the upper end of the upper valve seat 29. A second sealing ring 21 (shown in fig. 3) is arranged between the sealing and matching surfaces of the first valve body 30 and the upper valve seat 29, and the first valve body 30 is in sealing and matching with the inner cavity at the lower end of the upper valve seat 29. The second valve body 6 is located in the inner cavity of the first valve body 30, a third sealing ring 22 (shown in fig. 3) is arranged between the sealing and matching surfaces of the second valve body 6 and the central rod 8, and the central rod 8 is connected with the second valve body 6 in a sealing and matching manner. A central through hole is formed in the central rod 8; the two ends of the first spring 5 respectively abut against the upper valve seat 29 and the first valve body 30, the up-and-down stroke H1 (shown in figure 4) of the push rod 4 is arranged in the cavity of the upper valve seat 29, and the up-and-down stroke H2 (shown in figure 4) of the first valve body 30 is arranged in the cavity of the upper valve seat 29.

A first stop sheet 14 for limiting the upper end of the push rod 4 is arranged in the inner cavity of the upper valve seat 29. A second stopping sheet 17 used for limiting the lower end of the second sliding sleeve 7 is arranged in the inner cavity of the first valve body 30. A first step 27 for limiting the lower end of the push rod 4 and a second step 28 (shown in fig. 3) for limiting the upper end of the first valve body 30 are arranged in the inner cavity of the upper valve seat 29, and two ends of the first spring 5 respectively abut against the first step 27 of the upper valve seat 29 and the step surface of the first valve body 30; the first valve body 30 is located below the second step 28, the upper end of the first valve body 30 is provided with a second vent hole 15, and the lower end of the second valve body 6 is provided with a third vent hole 18. The upper end limit of the push rod 4 is a first stop sheet 14, the lower end limit of the push rod is a first step 27, the upper end limit of the first valve body 30 is a second step 28, and the lower end limit of the first valve body 30 is a lower valve seat 9.

The second sliding sleeve 7 is matched with the inner cavity of the first valve body 30, the second valve body 6 is matched with the inner cavity of the second sliding sleeve 7, two ends of the second spring 16 are respectively pressed on the first valve body 30 and the second valve body 6, and the upper end of the second valve body 6 is pressed on the step surface of the first valve body 30 under the action of the second spring 16 to form a first plane sealing surface F1. The second sliding bush 7 is provided with a first vent hole 19.

When the upper end face of the second valve body 6 is pressed against the step face of the first valve body 30 to form a first plane sealing face F1 (shown in fig. 2), the first plane sealing face F1 divides the inner cavity of the upper valve seat 29 into a first sealing cavity P1 and a second sealing cavity P2 (shown in fig. 2). The first valve body 30 moves up and down under the action of pressure difference between the first seal cavity P1 and the second seal cavity P2, the first air inlet A1 is communicated with the first seal cavity P1, and the second air outlet B2 is communicated with the second seal cavity P2. The second sealing cavity P2 is communicated with the central through hole, and when the push rod 4 overcomes the pressure of the second sealing cavity P2 and presses downwards against the upper end surface of the second valve body 6 to form a second plane sealing surface F2 (as shown in fig. 4), the channel between the second sealing cavity P2 and the central through hole is cut off. When the push rod 4 pushes the first plane sealing surface F1 downwards against the pressure of the second sealing cavity P2 and the acting force of the second spring 16, the first sealing cavity P1 is communicated with the second sealing cavity P2.

The lower end of the central rod 8 is in sealing fit with the lower valve seat 9, the third valve body 10 is installed in the inner cavity of the lower valve seat 9, two ends of the third spring 11 respectively abut against between the exhaust seat 12 and the third valve body 10, and the third valve body 10 abuts against the lower valve seat 9 under the elastic force of the third spring 11 to form a third plane sealing surface F3 (as shown in fig. 2); an exhaust port T is formed on the exhaust seat 12, and a second air inlet A2 and a second air outlet B2 are formed on the lower valve seat 9; the central through hole is communicated with the second air outlet B2 and the air outlet T, and when the central rod 8 is pressed downwards against the upper end surface of the third valve body 10 to form a fourth plane sealing surface F4 (as shown in figure 4), the channel between the central through hole and the second air outlet B2 is disconnected; when the center rod 8 pushes the third planar sealing surface F3 downward, the second air inlet a2 communicates with the second air outlet B2.

As shown in fig. 3, a fourth seal ring 24 is provided on the mating surface of the upper valve seat 29 and the lower valve seat 9, a fifth seal ring 26 is provided on the mating surface of the exhaust seat 12 and the lower valve seat 9, a sixth seal ring 25 is provided between the mating surfaces of the third valve body 10 and the exhaust seat 12, and a seventh seal ring 23 is provided between the mating surfaces of the center rod 8 and the lower valve seat 9.

The utility model discloses a soft brake valve working process as follows:

as shown in fig. 1, the first and second stages of the mild brake valve are both in the closed state, and at this time, the second valve body 6 closes the first plane sealing surface F1 under the action of the second spring 16, the first valve body 30 compresses the first spring 5 against the second step 28 under the pressure of the first sealing chamber P1, and the first valve body 30 is located at the upper limit position. The push rod 4 is pressed against the first stop sheet 14 under the pressure of the second seal cavity P2, and the push rod 4 is located at the upper limit position. The second planar sealing surface F2 and the fourth planar sealing surface F4 are opened, and the third valve body 10 closes the third planar sealing surface F3 under the force of the third spring 11. The compressed air in the first air outlet B1 passes through the second seal chamber P2 and the central hole formed in the central rod 8 and is discharged from the air outlet T. The compressed air of the second air outlet B2 is discharged through the air outlet T.

As shown in fig. 2, the first stage semi-braking and second stage braking off states of the mild braking valve,

when a driver steps on the pedal 1, the tappet 2 slides downwards to push the push rod 4 to slide downwards, when the push rod 4 overcomes the pressure of the second sealing cavity P2 and is pressed downwards against the upper end surface of the second valve body 6 to form a second plane sealing surface F2, a channel between the second sealing cavity P2 and the central through hole is disconnected, and the second sealing cavity P2 is not communicated with the atmosphere.

When the pedal is pressed continuously, the downward thrust of the push rod 4 is increased, and when the push rod 4 pushes the first plane sealing surface F1 downwards against the pressure of the second sealing cavity P2 and the acting force of the second spring 16, the first sealing cavity P1 is communicated with the second sealing cavity P2. Compressed air in the first air inlet A1 enters the second sealing cavity P2 through gaps among the first sealing cavity P1, the third vent hole 18, the first vent hole 19, the second valve body 6 and the first valve body 30, and compressed air in the second sealing cavity P2 flows into the first air outlet B1 through the second vent hole 15 and is discharged. At this time, the pressure of the second seal chamber P2 rises, the first valve body 30 moves downward a certain distance under the pressure of the second seal chamber P2, a new equilibrium state is reached, and the first planar seal F1 is closed again. The first valve body 30 moves up and down by means of pressure difference between the first sealing cavity P1 and the second sealing cavity P2, so that the pressure of the second sealing cavity P2 is controllable, soft braking, variable pressure braking and light braking without locking are realized.

As shown in FIG. 3, the mild brake valve has a first stage full brake and a second stage brake off condition.

When the first valve body 30 is pressed against the lower valve seat 9 under the pressure action of the second seal cavity P2, the first valve body 30 is at the lower limit position, at this time, the gap between the second valve body 6 and the step surface of the first valve body 30 is at the maximum state, the first seal cavity P1 and the second seal cavity P2 are completely opened, the compressed air of the first air inlet a1 enters the second seal cavity P2 through the gap between the first seal cavity P1, the third vent hole 18, the first vent hole 19, the second valve body 6 and the step surface of the first valve body 30, and the compressed air of the second seal cavity P2 flows into the first air outlet B1 through the second vent hole 15 and is discharged. When the central rod 8 is pressed downwards against the upper end surface of the third valve body 10 to form a fourth plane sealing surface F4, the central through hole is disconnected with the channel of the second air outlet B2.

As shown in FIG. 4, the mild brake valve has a first stage full brake and a second stage full brake condition.

When the pedal is further pressed, the downward thrust of the push rod 4 is increased, and when the central rod 8 pushes the third plane sealing surface F3 downwards, the second air inlet a2 is communicated with the second air outlet B2. The second stage brake is on.

The techniques not described above are common general knowledge of the skilled person. The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A soft brake valve is characterized in that an upper valve seat (29) is provided with a first air inlet (A1) and a first air outlet (B1), a push rod (4) is in sealing fit with an inner cavity at the upper end of the upper valve seat (29), a first valve body (30) is in sealing fit with an inner cavity at the lower end of the upper valve seat (29), a second valve body (6) is positioned in the inner cavity of the first valve body (30), a central rod (8) is connected with the second valve body (6), and a central through hole is formed in the central rod (8); two ends of the first spring (5) are respectively abutted against the upper valve seat (29) and the first valve body (30), the up-and-down moving stroke (H1) of the push rod (4) is arranged in the inner cavity of the upper valve seat (29), and the up-and-down moving stroke (H2) of the first valve body (30) is arranged in the inner cavity of the upper valve seat (29).

2. A soft brake valve according to claim 1, characterized in that when the upper end face of the second valve body (6) is pressed against the step face of the first valve body (30) to form a first plane sealing face (F1), the first plane sealing face (F1) divides the inner cavity of the upper valve seat (29) into a first sealing cavity (P1) and a second sealing cavity (P2), the first valve body (30) moves up and down under the action of the pressure difference between the first sealing cavity (P1) and the second sealing cavity (P2), the first air inlet (A1) is communicated with the first sealing cavity (P1), and the second air outlet (B2) is communicated with the second sealing cavity (P2); when the push rod (4) pushes the first plane sealing surface (F1) downwards against the pressure of the second sealing cavity (P2), the first sealing cavity (P1) is communicated with the second sealing cavity (P2).

3. A mild brake valve according to claim 2, characterised in that the second sealing chamber (P2) is in communication with the central through hole, and when the push rod (4) is pressed downwards against the upper end surface of the second valve body (6) against the pressure of the second sealing chamber (P2) to form a second plane sealing surface (F2), the passage between the second sealing chamber (P2) and the central through hole is interrupted.

4. A soft brake valve according to claim 3, characterized by comprising a second spring (16) and a second sliding sleeve (7), wherein the second sliding sleeve (7) is matched with the inner cavity of the first valve body (30), the second valve body (6) is matched with the inner cavity of the second sliding sleeve (7), two ends of the second spring (16) are respectively pressed against the first valve body (30) and the second valve body (6), and the upper end of the second valve body (6) is pressed against the step surface of the first valve body (30) under the action of the second spring (16) to form a first plane sealing surface (F1).

5. A gentle brake valve according to claim 4, characterised in that the second sleeve (7) is provided with a first vent (19).

6. A soft brake valve according to claim 5, characterized in that a first step (27) for limiting the lower end of the push rod (4) and a second step (28) for limiting the upper end of the first valve body (30) are arranged in the inner cavity of the upper valve seat (29), and two ends of the first spring (5) respectively abut against the first step (27) of the upper valve seat (29) and the step surface of the first valve body (30); the first valve body (30) is positioned below the second step (28), the second vent hole (15) is formed in the upper end of the first valve body (30), and the third vent hole (18) is formed in the lower end of the second valve body (6).

7. A soft brake valve according to claim 6, characterized in that a first stop piece (14) for limiting the upper end of the push rod (4) is arranged in the inner cavity of the upper valve seat (29), a second stop piece (17) for limiting the lower end of the second sliding sleeve (7) is arranged in the inner cavity of the first valve body (30), a first sealing ring (20) is arranged between the sealing and matching surfaces of the push rod (4) and the upper valve seat (29), a second sealing ring (21) is arranged between the sealing and matching surfaces of the first valve body (30) and the upper valve seat (29), and a third sealing ring (22) is arranged between the sealing and matching surfaces of the second valve body (6) and the central rod (8).

8. A soft brake valve according to any one of claims 1 to 7, characterized by comprising a lower valve seat (9), an exhaust seat (12), a third valve body (10) and a third spring (11), wherein the lower valve seat (9) is installed below the upper valve seat (29), the exhaust seat (12) is installed below the lower valve seat (9), the lower end of the central rod (8) is in sealing fit with the lower valve seat (9), the third valve body (10) is installed in the inner cavity of the lower valve seat (9), two ends of the third spring (11) respectively abut against the exhaust seat (12) and the third valve body (10), and the third valve body (10) abuts against the lower valve seat (9) under the elastic force of the third spring (11) to form a third plane sealing surface (F3); an exhaust port (T) is formed on the exhaust seat (12), and a second air inlet (A2) and a second air outlet (B2) are formed on the lower valve seat (9); the central through hole is communicated with the second air outlet (B2) and the exhaust port (T), and when the central rod (8) is pressed downwards against the upper end surface of the third valve body (10) to form a fourth plane sealing surface (F4), the channel between the central through hole and the second air outlet (B2) is disconnected; when the center rod (8) pushes the third planar sealing surface (F3) downward, the second air inlet (A2) communicates with the second air outlet (B2).

9. A soft brake valve according to claim 8, characterized in that the lower valve seat (9) is in threaded connection with the upper valve seat (29), a fourth sealing ring (24) is arranged on the mating end surface of the upper valve seat (29) and the lower valve seat (9), the exhaust seat (12) is in threaded connection with the lower valve seat (9), a fifth sealing ring (26) is arranged on the mating end surface of the exhaust seat (12) and the lower valve seat (9), a sixth sealing ring (25) is arranged between the mating surface of the third valve body (10) and the exhaust seat (12), and a seventh sealing ring (23) is arranged between the mating surface of the central rod (8) and the lower valve seat (9).

10. A mild brake valve according to claim 1, characterised by comprising a pedal (1), a pedal seat (3), a tappet (2), a first sliding sleeve (13); footboard (1) is articulated with pedal seat (3), goes up disk seat (29) and is connected with pedal seat (3), and first sliding sleeve (13) inlays on pedal seat (3), tappet (2) and the cooperation of first sliding sleeve (13), and footboard (1) is pressed in tappet (2) upper end, and tappet (2) lower extreme is pressed in push rod (4) upper end.