CN210769932U

CN210769932U - Brake air chamber with balance valve structure

Info

Publication number: CN210769932U
Application number: CN201921155220.6U
Authority: CN
Inventors: 盛中林; 王雪群
Original assignee: JIAXING SHENGDING MACHINERY CO Ltd
Current assignee: JIAXING SHENGDING MACHINERY CO Ltd
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2020-06-16
Anticipated expiration: 2029-07-22

Abstract

The utility model discloses a brake chamber with balanced valve structure, including push rod dish chamber, driving chamber, parking chamber and spring chamber, be provided with the parking that can stretch into the driving chamber in the parking chamber and carry out the pole, be provided with the air flue in the parking is carried out the pole, and air flue one end communicates to the driving chamber, and the other end communicates to the spring chamber, is provided with the balanced valve in the parking is carried out the pole, the balanced valve includes valve, disk seat and ejector pin body, the utility model discloses the spring chamber can be made into closed, and when the parking braking was relieved, the valve kept the normal close state, and the driving chamber does not communicate with the spring chamber, guarantees driving braking operational reliability; during parking braking, the valve is kept in a normally open state, the opening degree is large enough, the traveling crane cavity is communicated with the spring cavity, the spring cavity cannot generate negative pressure, meanwhile, compressed air in the traveling crane cavity is supplemented when the spring cavity expands, the compressed air does not need to be directly communicated with the outside, and the working environment of the spring cavity is improved.

Description

Brake air chamber with balance valve structure

Technical Field

The utility model belongs to the brake chamber field, more specifically the brake chamber with balanced valve structure that says so relates to.

Background

The Chinese patent with the application number of 2016206538775 discloses a piston type spring brake cylinder, which comprises a cylinder body, wherein the cylinder body comprises a spring cavity, a traveling cavity and a parking cavity, and a brake spring is arranged in the spring cavity; a piston is arranged between the spring cavity and the traveling cavity, and the brake spring is connected with the piston; an intermediate shell is arranged between the travelling cavity and the parking cavity; the middle shell is provided with a parking cavity air inlet and a driving cavity air inlet; the cylinder body in be equipped with piston rod, diaphragm and jar internal breather valve, the piston rod be hollow structure, piston rod one end and piston connection, the other end is connected with the diaphragm, the jar internal breather valve be located the piston rod, for guaranteeing the leakproofness requirement in driving chamber, driving braking operational reliability, internal breather valve aperture sets up very little, rapid air current makes internal breather valve switching during parking braking, makes the spring chamber produce the negative pressure, leads to brake spring parking braking force to reduce, because the spring chamber does not have the air tightness requirement, the negative pressure leads to outside space impurity to be inhaled in the chamber, makes piston seal, brake spring operational environment worsen to shorten air chamber working life.

And to two diaphragm spring brake chambers, its spring chamber directly communicates with each other with the external world, and when parking braking, external air current directly gets into the spring chamber, can lead to spring chamber intracavity brake spring, release disc subassembly and involucra to produce harmful effects, shortens its working life greatly.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a spring cavity which can be made into a closed type, when the parking brake is released, the valve keeps a normally closed state, and the service cavity is not communicated with the spring cavity, thereby ensuring the service brake working reliability; during parking braking, the valve is kept in a normally open state, the opening degree is large enough, the traveling crane cavity is communicated with the spring cavity, the spring cavity cannot generate negative pressure, meanwhile, compressed air in the traveling crane cavity is supplemented when the spring cavity expands, the compressed air does not need to be directly communicated with the outside, and the working environment of the spring cavity is improved.

In order to achieve the above purpose, the utility model provides a following technical scheme: a brake air chamber with a balance valve structure comprises a push rod disc cavity, a driving cavity, a parking cavity and a spring cavity, wherein a parking executing rod capable of extending into the driving cavity is arranged in the parking cavity, an air passage is arranged in the parking executing rod, one end of the air passage is communicated with the driving cavity, the other end of the air passage is communicated with the spring cavity, a balance valve is arranged in the parking executing rod, the balance valve comprises,

the valve seat is fixed in the parking actuating rod, and a slide way is arranged on the valve seat;

the valve is positioned on one side facing the travelling crane cavity, a first spring for enabling the valve to be tightly attached to the valve seat is connected onto the valve, and a first air hole communicated with the air passage is formed in the valve;

the ejector rod body is located towards spring chamber one side, is connected with the second spring that makes it remove to the disk seat on the ejector rod body, sets up the second gas pocket with the air flue intercommunication on the ejector rod body, and the ejector rod body includes ejecting portion and sliding part, and ejecting portion stretches into slide and slide sliding connection, sliding part and parking executive rod inner wall sliding connection leave between sliding part and the disk seat and aerify the chamber, sets up the hole of aerifing that makes aerifing chamber and parking chamber intercommunication on the parking executive rod lateral wall.

Furthermore, a supporting body is arranged between the sliding part and the ejection part, and the supporting body enables an inflation cavity to be formed between the sliding part and the valve seat.

And further, sealing rings are arranged between the ejection part and the slide way and between the sliding part and the parking actuating rod.

The second air hole comprises a shaft air hole and a side air hole, the shaft air hole is positioned on the central axis of the ejector rod body, and the side air hole is positioned on the side wall of the ejector part, facing one side of the valve, and the side air hole is communicated with the first air hole.

Further said first air hole is located in a side wall of the valve.

Further said first air hole is located adjacent to the side wall of the valve.

The further brake chamber is a piston type brake chamber or a double-diaphragm type brake chamber.

Compared with the prior art, the beneficial effects of the utility model are that: the piston type brake air chamber can be used in both piston type and double-diaphragm type brake air chambers, and the piston type brake air chamber directly utilizes a balance valve to replace an internal breather valve in the prior art; the opening and closing of the valves of the service cavity and the spring cavity of the brake air chamber are controlled by the working state of the parking cavity, the service cavity and the valve of the spring cavity are kept normally closed in the parking brake release state (during normal running), the service brake working reliability is ensured, the valves of the service cavity and the spring cavity are kept open during parking brake, the opening degree is large enough, the spring cavity can not generate negative pressure, and therefore the negative influence caused by negative pressure is eliminated; the spring cavity of the double-diaphragm brake air chamber can be of a closed structure and is not directly communicated with the external environment, so that the working environment of the strong spring is improved.

Drawings

FIG. 1 is a schematic view of an embodiment of the present invention illustrating a manual parking release;

fig. 2 is a schematic structural view of a parking actuating lever according to a first embodiment of the present invention;

fig. 3 is a schematic view of a normal driving state according to an embodiment of the present invention;

FIG. 4 is a schematic view of a braking state of a driving vehicle according to an embodiment of the present invention;

fig. 5 is a schematic view of a parking braking state according to an embodiment of the present invention;

FIG. 6 is a schematic view illustrating a manual parking releasing state according to an embodiment of the present invention;

FIG. 7 is an enlarged view at F of FIG. 6;

fig. 8 is a schematic view of a second normal driving state according to an embodiment of the present invention;

FIG. 9 is a schematic view of a second service braking state according to an embodiment of the present invention;

fig. 10 is a schematic view of a second parking brake state according to the embodiment of the present invention.

Reference numerals: A. a pusher tray cavity; B. a travelling crane cavity; C. a parking chamber; D. a spring cavity; E. an inflation hole; 9. a parking actuating lever; 901. a first spring; 902. a valve; 903. a jack rod body; 9031. a push-out part; 9032. a sliding part; 9033. a support body; 934. an inflation cavity; 904. a valve seat; 905. a seal ring; 906. a second spring; 907. a bushing; 908. a first air hole; 909. a second air hole; 9091. a side vent; 9092. and (4) shaft air holes.

Detailed Description

Embodiments of the control plenum having the balanced valve structure of the present invention will be further described with reference to fig. 1 to 10.

In the description of the present invention, it should be noted that, for the orientation words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and the positional relationship are indicated based on the orientation or the positional relationship shown in the drawings, and the description is only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the device or the element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and "a plurality" or "a plurality" in the description of the invention means two or more unless a specific definition is explicitly provided.

The first embodiment is as follows:

as shown in fig. 1-5, the brake chamber in this embodiment is a piston-type brake chamber, and the parking actuation rod is a piston rod.

A brake air chamber with a balance valve structure comprises a push rod disc cavity, a driving cavity, a parking cavity and a spring cavity, wherein a parking executing rod 9 capable of extending into the driving cavity is arranged in the parking cavity, an air passage is arranged in the parking executing rod 9, one end of the air passage is communicated with the driving cavity, the other end of the air passage is communicated with the spring cavity, a balance valve is arranged in the parking executing rod 9, the balance valve comprises,

the valve seat 904 is fixed in the parking actuating rod 9, and a slide way is arranged on the valve seat 904;

the valve 902 is positioned on one side facing the driving cavity, a first spring 901 which enables the valve 902 to be tightly attached to the valve seat 904 is connected to the valve 902, and a first air hole 908 communicated with the air passage is formed in the valve 902;

the ejector rod body 903 is located on one side of the spring cavity, a second spring 906 enabling the ejector rod body 903 to move towards the valve seat 904 is connected onto the ejector rod body 903, a second air hole 909 communicated with an air passage is formed in the ejector rod body 903, the ejector rod body 903 comprises an ejection portion 9031 and a sliding portion 9032, the ejection portion 9031 extends into a slide way and is in sliding connection with the slide way, the sliding portion 9032 is in sliding connection with the inner wall of the parking actuating rod 9, an inflating cavity 934 is reserved between the sliding portion 9032 and the valve seat 904, and an inflating hole E enabling the inflating cavity 934 to be communicated with the parking cavity is formed in the side wall of the parking actuating rod 9.

In this embodiment, in order to facilitate the modification of the piston-type control air chamber in the prior art, a bushing 907 may be additionally disposed in the piston rod, one end of the bushing 907 facing the spring cavity D is sealed with the piston rod, the other end of the bushing 907 abuts against the valve seat 904, and one end of the bushing interfering against the valve seat 904 is opened with a hole communicated with the inflation cavity 934, a space for flowing compressed air is left between the bushing 907 and the piston rod, that is, an axial air flow passage is disposed on an outer surface of the bushing 907, at this time, the sliding portion 9032 is slidably connected with the bushing 907, and the sealing ring 905 is disposed between the sliding portion.

Wherein the elastic force of the second spring 906 is larger than that of the first spring 901, when the ejector rod body 903 is driven to move by the non-compressed air in the inflation cavity 934, the second spring 906 will make the ejector rod body 903 move towards the valve 902 and compress the first spring 901.

In this embodiment, the original internal breathing valve in the piston rod is omitted and replaced by a balance valve.

As shown in fig. 2, the valve 902 is closed corresponding to the slide way, that is, when the valve 902 abuts against the valve seat 904, the slide way of the valve seat 904 is closed, the second air hole 909 on the plunger body 903 is closed, and when the plunger body 903 is located on the left side, the valve 902 is pushed open and no longer abuts against the valve seat 904.

As shown in fig. 1, when the parking brake is released manually, there is no compressed air in the service chamber B and the parking chamber C, and at this time, there is no pressure in the inflating chamber 934, the ejector rod 903 moves leftward due to the action of the second spring 906, and pushes the valve 902 open, and at this time, the second air hole 909 is communicated with the first air hole 908, so that the service chamber B is communicated with the spring chamber D.

As shown in fig. 3, in a normal driving state, compressed air is not provided in the driving chamber B, compressed air is introduced into the parking chamber C, and enters the inflating chamber 934 through the inflating hole E, so that the plunger body 903 moves to the right side, at this time, the valve 902 does not have the action of the plunger body 903, the valve 902 is tightly attached to the valve seat 904 under the action of the first spring 901, the first air hole 908 and the second air hole 909 are in a blocking state, and the driving chamber B is blocked from the spring chamber D.

As shown in fig. 4, in the service braking state, the service chamber B is filled with compressed air, the parking chamber C is kept filled with compressed air, the valve 902 is still kept close to the valve seat 904, the first air hole 908 and the second air hole 909 are in the blocking state, and the service chamber B is blocked from the spring chamber D.

As shown in fig. 5, in the parking brake state, the service chamber B is not pressurized, the parking chamber C is not pressurized, the ejector rod 903 is under the action of the second spring 906, the ejector rod 903 is located at the leftmost side, the valve 902 is ejected, and the service chamber B and the spring chamber D are kept communicated.

In this embodiment, a support 9033 is preferably disposed between the sliding portion 9032 and the ejecting portion 9031, and the support 9033 forms an inflation cavity 934 between the sliding portion 9032 and the valve seat 904.

Wherein the supporter 9033 can adopt a support rod or a support table, compressed air is not provided in the inflating cavity 934, when the ejector rod body 903 is positioned at the left side, the supporter 9033 is abutted to the valve seat 904, the inflating cavity 934 only has a reduced volume, but still exists, and the ejector rod body 903 can be moved rightwards when compressed air is inflated again.

In this embodiment, sealing rings 905 are preferably disposed between the ejection portion 9031 and the slide way and between the sliding portion 9032 and the parking actuating rod 9, where the sealing rings 905 are Y-shaped sealing rings 905, so as to ensure that the parking cavity C is separated from the driving cavity B and the spring cavity D in the sliding process of the ejector rod 903.

The second air hole 909 preferably includes a shaft air hole 9092 and a side air hole 9091, the shaft air hole 9092 is located on a central axis of the ejector rod body 903, and the side air hole 9091 is located on a side wall of the ejector portion 9031 facing the valve 902, and the side air hole 9091 is communicated with the first air hole 908.

When the top rod body 903 is positioned at the left side, the valve 902 is pushed open, and the spring cavity D is communicated with the first air hole 908 through the shaft air hole 9092 and the side air hole 9091; when the rod 903 is positioned on the right side, the end of the ejector 9031 is completely retracted into the valve seat 904, the valve 902 closes and abuts against the valve seat 904, and the side air hole 9091 cannot communicate with the first air hole 908.

The preferred first air hole 908 of this embodiment is located near the side wall of the valve 902, as shown in FIG. 2.

Example two:

as shown in fig. 6 to 10, the brake chamber in this embodiment is a dual-diaphragm type brake chamber, wherein the parking actuation rod 9 is a tappet, and the other technical features are the same as those of the first embodiment.

As shown in fig. 6, when the parking brake is released manually, there is no compressed air in the service chamber B and the parking chamber C, and there is no pressure in the inflating chamber 934, the ejector rod 903 moves leftward due to the action of the second spring 906, and pushes the valve 902 open, and at this time, the second air hole 909 is communicated with the first air hole 908, so that the service chamber B is communicated with the spring chamber D.

As shown in fig. 8, in a normal driving state, compressed air is not provided in the driving chamber B, compressed air is introduced into the parking chamber C, and enters the inflating chamber 934 through the inflating hole E, so that the plunger 903 moves to the right side, at this time, the valve 902 does not have the action of the plunger 903, the valve 902 is tightly attached to the valve seat 904 under the action of the first spring 901, the first air hole 908 and the second air hole 909 are in a blocking state, and the driving chamber B is blocked from the spring chamber D.

As shown in fig. 9, in the service braking state, the service chamber B is filled with compressed air, the parking chamber C is kept filled with compressed air, the valve 902 is still kept close to the valve seat 904, the first air hole 908 and the second air hole 909 are in the blocking state, and the service chamber B is blocked from the spring chamber D.

As shown in fig. 10, in the parking brake state, the service chamber B is not pressurized, the parking chamber C is not pressurized, the ejector rod 903 is under the action of the second spring 906, the ejector rod 903 is located at the leftmost side, the valve 902 is ejected, and the service chamber B and the spring chamber D are kept communicated.

The first air vent 908, which is preferred in this embodiment, is located on the sidewall of the valve 902, as shown in FIG. 7.

The utility model discloses in, owing to adopt the balanced valve, it can be opened or close according to brake chamber's state, consequently can be so that spring chamber D be in and separate the state with the external world, guarantee that its operational environment is good.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a brake chamber with balanced valve structure, includes push rod dish chamber, driving chamber, parking chamber and spring chamber, is provided with the parking actuating lever that can stretch into driving chamber in the parking chamber, its characterized in that: an air passage is arranged in the parking actuating rod, one end of the air passage is communicated with the driving cavity, the other end of the air passage is communicated with the spring cavity, a balance valve is arranged in the parking actuating rod and comprises,

2. A brake chamber having a balanced valve structure according to claim 1, characterized in that: and a support body is arranged between the sliding part and the ejection part, and the support body enables an inflation cavity to be formed between the sliding part and the valve seat.

3. A brake chamber having a balanced valve structure according to claim 2, characterized in that: sealing rings are arranged between the ejection part and the slide way and between the sliding part and the parking actuating rod.

4. A brake chamber having a balanced valve structure according to claim 3, characterized in that: the second air hole comprises a shaft air hole and a side air hole, the shaft air hole is positioned on the central axis of the ejector rod body, and the side air hole is positioned on the side wall of the ejector part, facing one side of the valve, and is communicated with the first air hole.

5. The brake chamber having a balanced valve structure of claim 4, characterized in that: the first air hole is positioned on the side wall of the valve.

6. The brake chamber having a balanced valve structure of claim 4, characterized in that: the first air hole is positioned close to the side wall of the valve.

7. The brake chamber having a balanced valve structure of claim 4, characterized in that: the brake chamber is a piston type brake chamber or a double-diaphragm type brake chamber.