CN101870298A

CN101870298A - Brake control valve and linear cam mechanism thereof

Info

Publication number: CN101870298A
Application number: CN201010211450A
Authority: CN
Inventors: 韩晟; 曹宏哲
Original assignee: CSR Zhuzou Institute Co Ltd; Beijing CSR Times Locomotive and Rolling Stock Mechanics Co Ltd
Current assignee: CRRC Zhuzhou Institute Co Ltd; Beijing CRRC Heavy Industry Mechanics Co Ltd
Priority date: 2010-06-18
Filing date: 2010-06-18
Publication date: 2010-10-27
Anticipated expiration: 2030-06-18
Also published as: CN101870298B

Abstract

The invention discloses a linear cam mechanism, which is used for a brake control valve. The linear cam mechanism mainly comprises a linear cam which is positioned in the center of an action valve body and a plurality of stop valves which are distributed around the linear cam, wherein a control piston assembly drives the linear cam to move up and down; a positioning mechanism can hold the linear cam at a plurality of different action positions; and when the linear cam is positioned at different action positions, the control camber of the linear cam ensures that corresponding stop valves are in an open state or a close state, so that the control over different air channels is realized. When the linear cam of the mechanism is positioned at different action positions, the control camber of the linear cam ensures that the corresponding stop valves are in the open state or the close state, so that the control over the different air channels are realized; and therefore the linear cam can substitute a conventional sliding valve structure to prolong the overhaul period of the brake control valve and reduce the overhaul cost. The invention also discloses the brake control valve which comprises the linear cam mechanism.

Description

Brake control valve and linear cam mechanism thereof

Technical field

The present invention relates to the brake technical field, particularly relate to a kind of linear cam mechanism that is used for brake control valve.The invention still further relates to the brake control valve that comprises above-mentioned linear cam mechanism.

Background technology

Railway is one of topmost communications and transportation mode of China, plays irreplaceable vital function in the economic development of China, and along with the trailing weight of train and improving constantly of running velocity, the development of train braking technology is also more and more important.

The car brakeing machine is for apply brake, alleviation and the mechanical device that is provided with on vehicle, on railway transportation, in order to regulate train running speed and to stop in the predetermined area timely and accurately, guarantee that train safe moves on schedule, brake all is housed on each vehicle.

Air damper is meant and utilizes the medium of pressurized air as control brake, and as the motive brake that produces braking force, briefly, be exactly that locomotive and train connect after the extension, provide pressurized air by head to the air pipe line of permutation car, command the braking system works by the blast of adjusting train, air damper is the brake that present various countries extensively adopt, and the rolling stock of China is the dress air damper all.

The car brakeing machine is divided into passenger car brake and freight car braking machine, and passenger car brake has PM type, LN type, 104 types and F8 type etc., and the freight car braking machine has K type, GK type, 103 types, 120 types, 120-1 type etc.

Above-mentioned K type brake is U.S. Wei Sitinghaosi (westinghouse, also be translated into " western room ") air damper of the direct mode of action of two pressure equalizing system of system, after liberation use by abroad in design-calculated K type triple valve in 1905, its version falls behind, and the effect performance is simple.

1958, China braking worker transformed K type brake, has trial-produceed GK type brake successfully, and letter " G " is exactly first font of the phonetic that " changes " of Chinese character.GK type brake is solving the braking problem of high capacity waggon at that time basically, and its triple valve adopts guiding valve packing structure, and their action element mainly is a metal grinding spare, and filter dirt poor performance, thereby the maintenance time limit is short, and service work person is big, and service technique requires also high.

1965-1978, has developed 103 type lorry air dampers at designs such as china academy of railway sciences and Qiqihar carriage woks, Meishan Locomotive Plant; 1989-1994, has developed 120 type lorry air dampers at designs such as china academy of railway sciences and Meishan Locomotive Plant; The 2003-2007 china academy of railway sciences has been developed 120-1 type lorry air damper.

103 type distributing valves and 120,120-1 type control cock are respectively the core control parts of 103 type lorry air dampers and 120,120-1 type lorry air damper, all adopt rubber diaphragm and metal sliding valve structure.Piston adopts the rubber diaphragm structure, it has replaced metallic piston and metal packing in the old type triple valve, can guarantee air-tightness like this. raising effect sensitivity, and eliminated substantially owing to the fault that produces is sewed at the packing place, easy access, and the master control mechanism (service portion) in the main valve still keeps sliding valve structure (comprising shutoff valve), when guiding valve rests on a certain definite position, some paths are communicated with, and simultaneously other-a little paths cut off, for carrying out a succession of continuous action, guiding valve is undoubtedly the both compact and interlocking property of structure than reliable element.

Along with the transformation of China railways Speed Increase of Freight Cars is finished, 120 and the 120-1 valve become the main valve of using of China railways freight car braking machine, and promote the use of in the system-wide large tracts of land, guaranteeing to play critical effect aspect the lorry safe in operation.But 120 and period of inspection and repair of 120-1 valve shorter, be generally 2 years, its cost of overhaul is higher.

Trace it to its cause, the metal sliding valve structure is to influence 120 and one of the principal element of 120-1 valve period of inspection and repair.Because the metal sliding valve structure relies on the metal grinding face sealing, therefore, when on the metal grinding face during oil film breakdown guiding valve easily sew, pulling the metal grinding face when containing impurity in the pressure air easily causes guiding valve to sew, when the metal grinding surface wear, also can cause guiding valve to sew, and guiding valve to sew be one of major failure of railway vehicle braking system, in case leak, must overhaul brake.

Therefore, how under the prerequisite that guarantees functions of use, prolonging the period of inspection and repair of brake control valve as much as possible, thereby reduce the cost of overhaul, is the present technical issues that need to address of those skilled in the art.

Summary of the invention

The purpose of this invention is to provide a kind of linear cam mechanism.When the linear cam of this mechanism is in different active positions, its control curved surface can make corresponding stop valve be in the state of opening or closing, thereby realizes the control to different gas circuits, can replace traditional sliding valve structure, to prolong the period of inspection and repair of brake control valve, reduce the cost of overhaul.

Another object of the present invention provides a kind of brake control valve.

For solving the problems of the technologies described above, the invention provides a kind of linear cam mechanism, be used for brake control valve, comprising:

Operating valve body is located at the control plunger assembly below of brake control valve, and its middle part is provided with vertical mounting hole of up/down perforation, is provided with the horizontal mounting hole that one deck at least extends internally and connects with it from each side of described Operating valve body around described vertical mounting hole;

Linear cam, be the column with a plurality of sides, its side is provided with control curved surface and location curved surface, and described linear cam is located in vertical mounting hole of described Operating valve body, by its up-and-down movement of piston actuated of described control plunger assembly, and have a plurality of different active positions;

Shutoff valve, be located in the horizontal mounting hole of described Operating valve body, its control end is corresponding to the control curved surface of described linear cam, described Operating valve body is provided with admission port and the exhausr port that is connected with the induction opening and the deflation hole of each shutoff valve respectively, described linear cam is opened by control curved surface when different active position or is closed shutoff valve, realizes the break-make of each shutoff valve place gas circuit.

Detent mechanism is located in the horizontal mounting hole of described Operating valve body, and its positioning end is corresponding to the location curved surface of described linear cam, so that described linear cam is remained on different active positions.

Preferably, described detent mechanism comprises that an end is provided with the positioning mandril cover that negative thread, the other end are provided with seam, the inside of described positioning mandril cover is provided with positioning mandril, retainer spring and location adjusting lever successively, one end of described positioning mandril through described seam protruding and be provided with can free rolling spheroid, one end of described location adjusting lever is provided with outside thread and screws in described positioning mandril cover, one end of described retainer spring is supported on the spacing axle collar of described positioning mandril, and the other end is supported on the thread end of described location adjusting lever; Described spheroid in the elastic force effect lower support of retainer spring on the curved surface of the location of described linear cam.

Preferably, described shutoff valve comprises the valve pocket with first chamber and second chamber; The sandwich valve outside in described first chamber is provided with first spring, one end of described first spring is supported on the described sandwich valve, the other end is supported on by on the spacing spring perch of back-up ring, and described sandwich valve is in the effect lower support of first spring bottom at described first chamber; Push rod inboard in described second chamber is provided with second spring, one end of described second spring is supported on described push rod by on the spacing axle collar of back-up ring, the other end is supported on the bottom of described second chamber, one end of described push rod is protruding and be provided with energy free rolling spheroid, and the other end passes described first chamber and aims at described sandwich valve with the via between second chamber; Be provided with sliding ring between described push rod and the via, be provided with the induction opening that is connected with described via in the middle of the described valve pocket, the cavity wall of described first chamber is provided with the deflation hole that is connected with the outboard chambers of described sandwich valve; The outer circumference surface of described valve pocket is provided with the seal ring that twice lay respectively at described induction opening both sides.

Preferably, each admission port on the described Operating valve body is connected with the induction opening of each described shutoff valve via endoporus; Each exhausr port on the described Operating valve body is positioned on the baffle plate that is fixed on described Operating valve body side, is connected in the end with the deflation hole of each described shutoff valve.

Preferably, described linear cam is the square that middle part, each limit has rectangular preiection on cross-sectional plane, its each side all have two mutually concordant sides and one in the centre to the side of outer lug.

Preferably, control curved surface on the described linear cam is formed by the outer convex surface on its side, place and the side, be transition cambered surface or transition inclined-plane between described outer convex surface and the side, location curved surface on the described linear cam is formed by the side at its place and the inner concave on the side, is transition cambered surface or transition inclined-plane between described inner concave and the side.

Preferably, be provided with stabilizing spring between described linear cam and the described control plunger assembly, an end of described stabilizing spring is supported on the control valve body bottom of described control plunger assembly, and the other end is supported on the stabilizing spring seat on described linear cam top; Be provided with retarding spring in the lower cover of described Operating valve body bottom, an end of described retarding spring is supported on the deceleration spring abutment inner bottom surface of described linear cam bottom, and the other end is supported on the inner bottom surface of described lower cover.

Preferably, be provided with lining in vertical mounting hole of described Operating valve body, described linear cam is arranged in the polygon endoporus of described lining, and described lining is provided with and described horizontal mounting hole through hole one to one.

Preferably, be provided with feather key between the side of described linear cam and the inwall of described lining, the part of described feather key is arranged in the keyway of described linear cam, and another part is arranged in vertical chute of described lining.

The present invention also provides a kind of brake control valve, comprises above-mentioned each described linear cam mechanism.

Linear cam mechanism provided by the present invention is mainly by being positioned at the middle linear cam of Operating valve body, and the some shutoff valves that center on described linear cam layout are formed, linear cam can up-and-down movement under the driving of control plunger assembly, detent mechanism can hold it in a plurality of different active positions, when linear cam is in different active positions, its control curved surface can make corresponding stop valve be in the state of opening or closing, thereby realize control to different gas circuits, satisfy the gas path on-off requirement of brake control valve, compare with traditional sliding valve structure, mainly have following technical advantage:

One, control curved surface by linear cam is controlled shutoff valve, no longer rely on the metal grinding face to seal, can avoid using the metal sliding valve structure, slide relative between described control curved surface and the shutoff valve only is used to carry out switch motion and does not participate in sealing, therefore can not produce harmful effect to the sealing property of brake control valve, and the shutoff valve stable performance on each gas circuit, also be difficult for leaking even frequently open, close, thereby can significantly prolong the period of inspection and repair of brake control valve, reduce the cost of overhaul.In addition, the metal grinding technology during the valve of can also removing controls is newly made, overhauled reduces labour intensity, simplifies maintenance technology.

They are two years old, control curved surface on described shutoff valve and the linear cam has the composite behaviour of " cordwood system ", according to the requirement of brake control valve, when needing the function of adjusting control valve, only need can meet the demands to the control curved surface adjustment on the linear cam to gas path on-off.For example,, can increase the height of valve body, increase horizontal mounting hole on the valve body again if the curved surface quantity of control shutoff valve is not enough, the control curved surface length of corresponding like this each side of increase linear cam, can increase can controlled shutoff valve quantity.

Its three, the control curved surface on the linear cam is corresponding one by one with shutoff valve, is similar to the key of ball bead type lockset, only just can open specific shutoff valve at ad-hoc location, and other shutoff valve can't be opened, and does not have the situation of phase mutual interference, has failure-free interlocking performance.

In a kind of specific embodiment, described shutoff valve is mainly assembled by parts such as valve pocket, push rod, sandwich valve, springs, the outwardly directed end of its positioning mandril is provided with energy free rolling spheroid, described spheroid can be converted to friction of rolling with the slide relative friction between push rod and the linear cam control curved surface, thereby reduce intermetallic wearing and tearing, avoid causing variety of issue because of wearing and tearing.

In the another kind of specific embodiment, described detent mechanism is mainly assembled by parts such as positioning mandril, positioning mandril cover, location adjusting lever and springs, its positioning mandril can freely stretch within the specific limits, match with location curved surface on the linear cam and to realize the switching of linear cam between each active position, its spring force can be adjusted by the location adjusting lever, thereby satisfies adjusting the requirement of dynamics.

Description of drawings

Fig. 1 is located at the schematic perspective view of control plunger assembly below for linear cam mechanism provided by the present invention;

Fig. 2 is located at the schematic perspective view of another angle of control plunger assembly below for linear cam mechanism provided by the present invention;

Fig. 3 is located at the lateral plan of control plunger assembly below for linear cam mechanism provided by the present invention;

Fig. 4 is the A-A view of Fig. 3;

Fig. 5 is the B-B view of Fig. 3;

Fig. 6 is the C-C view of Fig. 3;

Fig. 7 is the schematic perspective view of linear cam shown in Fig. 4;

Fig. 8 is the lateral plan of linear cam shown in Figure 7;

Fig. 9 is the D-D view of linear cam shown in Figure 8;

Figure 10 is the birds-eye view of linear cam shown in Figure 8;

Figure 11 is that scheme drawing is launched in the side of linear cam;

Figure 12 is that scheme drawing is launched in the side of Operating valve body;

Figure 13 is the structural representation of detent mechanism;

Figure 14 is the cutaway view of detent mechanism shown in Figure 13;

Figure 15 is the structural representation of shutoff valve;

Figure 16 is the cutaway view of shutoff valve shown in Figure 15;

When Figure 17 is alleviated the position for linear cam is in and the matching relationship scheme drawing of detent mechanism;

When Figure 18 is alleviated the position for linear cam is in and the matching relationship scheme drawing of one of them shutoff valve.

Pairing equipment of numeral number or component names are as follows among the figure:

1. 1-1. 1-1-10. 1-1-11. 1-1-12. 1-2. 1-3. 2.2-1. 2-1-1. 2-2. 2-2-1. 2-2-2. 2-2-3. 2-3. 2-4. 2-4-1. 2-4-2. 2-4-3. 2-5. 2-6. 2-7. 2-8. 2-9. 2-10. 2-11. 2-12. 3-1. 3-2. 3-3. 3-3-1. 3-3-2. 3-3-3.3-3-4. 3-3-5. 3-3-6. 3-3-7.3-3-8. 3-3-9. 3-3-10. 3-3-11.3-3-12. 3-3-13. 3-5. 3-6.3-7. 3-8. 3-9. 3-11. 3-12. 4-4. 4-10. 4-1-1. 4-1-2. 4-1-3. 4-1-4. 4-1-5. 5. 5-1. 5-2. 5-3.5-4. 5-5. 6. 7. 8. 9. 10. 11.

The specific embodiment

Core of the present invention provides a kind of linear cam mechanism.When the linear cam of this mechanism is in different active positions, its control curved surface can make corresponding stop valve be in the state of opening or closing, thereby realizes the control to different gas circuits, can replace traditional sliding valve structure, to prolong the period of inspection and repair of brake control valve, reduce the cost of overhaul.Another core of the present invention provides a kind of brake control valve that comprises above-mentioned linear cam mechanism.

In order to make those skilled in the art person understand the present invention program better, the present invention is described in further detail below in conjunction with the drawings and specific embodiments.

Terms such as herein " first, second " only is for convenience of description, with the different constituent elementss that differentiation has same names, do not represent successively or the primary and secondary relation, same, the term in expression orientation such as " upper and lower inside and outside " is based on the position relation of accompanying drawing, also is for convenience of description.

Please refer to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 1 is located at the schematic perspective view of control plunger assembly below for linear cam mechanism provided by the present invention; Fig. 2 is located at the schematic perspective view of another angle of control plunger assembly below for linear cam mechanism provided by the present invention; Fig. 3 is located at the lateral plan of control plunger assembly below for linear cam mechanism provided by the present invention; Fig. 4 is the A-A view of Fig. 3; Fig. 5 is the B-B view of Fig. 3; Fig. 6 is the C-C view of Fig. 3.

In a kind of specific embodiment, linear cam mechanism provided by the present invention mainly is made of Operating valve body 1, linear cam 2, shutoff valve, detent mechanism etc.

Operating valve body 1 is cube shaped substantially, be fixed by bolts on the mounting flange 5-1 of control plunger assembly 5 belows, its middle offers vertical mounting hole 1-1 of up/down perforation, with vertical mounting hole 1-1 is the center, the horizontal mounting hole 1-2 that is respectively equipped with inside vertical extent on its four sides and connects with vertical mounting hole 1-1, laterally mounting hole 1-2 one has four layers, four every layer, four horizontal mounting hole 1-2 of each layer distribute along four direction, are " ten " font on cross-sectional plane substantially.

Control plunger assembly 5 comprises control valve body 5-2 and control plunger 5-3, the upside cavity of control plunger 5-3 is communicated with the train pipe, feed train tube pressure, the downside cavity of control plunger 5-3 is communicated with auxiliary reservoir, feed auxiliary reservoir pressure, the pressure reduction of train tube pressure and auxiliary reservoir pressure is the power that control plunger 5-3 moves in control valve body 5-2, when train tube pressure becomes big and during greater than auxiliary reservoir pressure, control plunger 5-3 will move down, when train tube pressure diminishes and during less than auxiliary reservoir pressure, control plunger 5-3 will move up.

Please refer to Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11, Fig. 7 is the schematic perspective view of linear cam shown in Fig. 4; Fig. 8 is the lateral plan of linear cam shown in Figure 7; Fig. 9 is the D-D view of linear cam shown in Figure 8; Figure 10 is the birds-eye view of linear cam shown in Figure 8; Figure 11 is that scheme drawing is launched in the side of linear cam.

Linear cam 2 is the square that each middle part, limit has rectangular preiection on cross-sectional plane, its each side all has two mutually concordant sides and a side outwards protruding from the centre, and promptly each side has three sides, amounts to 12 sides all around.

The latter half of first side is provided with control curved surface 2-1, the first half is provided with Long Circle keyway 2-1-1, second side is provided with control curved surface 2-2, the 3rd side is provided with control curved surface 2-3, the 4th side is provided with location curved surface 2-4, the 5th side is provided with control curved surface 2-5, the 6th side is provided with control curved surface 2-6, the heptalateral face is provided with control curved surface 2-7, the 8th side is provided with control curved surface 2-8. the 9th side and is provided with control curved surface 2-9, the tenth side is provided with location curved surface 2-10, and the 11 side is provided with control curved surface 2-11, and the tenth two side faces is provided with control curved surface 2-12.

Above-mentioned each control curved surface is formed by the side at its place and the outer convex surface on the side, is the transition inclined-plane between outer convex surface and the side.For example, control curved surface 2-2 is formed by the side 2-2-1 at its place and the outer convex surface 2-2-2 that is positioned on the 2-2-1 of side, be transition inclined-plane 2-2-3 between the two with certain slope, the shape of all the other control curved surface is similar with it, difference just is, requirement according to controllable function, the outer convex surface of different control curved surface is positioned at the differing heights place of side, place, and has different length, control curved surface 2-1 wherein, control curved surface 2-5, the control curved surface 2-7 first half, the 8th control curved surface 2-8, the evagination face length degree of control curved surface 2-9 is shorter, only can open shutoff valve at a certain active position, and control curved surface 2-2, control curved surface 2-3, control curved surface 2-6, control curved surface 2-11, the evagination face length degree of control curved surface 2-12 is longer, can open shutoff valve at two continuous active positions.

The location curved surface is formed by the side at its place and the inner concave on the side, be the transition cambered surface between inner concave and the side, wherein locating curved surface 2-4 comprises, following two parts, form by the side 2-4-1 at its place and the inner concave 2-4-2 that is positioned on the 2-4-1 of side respectively, be transition cambered surface 2-4-3 between side 2-4-1 and the inner concave 2-4-2, the top of location curved surface 2-4 is divided into main locating surface, two inner concave 2-4-2 determines that linear cam has four active positions, the bottom of location curved surface 2-4 is divided into secondary locating surface, determined three active positions of two inner concave 2-4-2 are identical with first three active position on top, both locate (also can locate respectively as required) simultaneously during work, difference just is, the chamfering radian of curved surface 2-4 lower part, location is greater than the chamfering radian on top, be that linear cam is last, when mobile down, the resistance on curved surface 2-4 top, location is greater than the resistance of lower part.

Location curved surface 2-10 is structurally symmetrical with location curved surface 2-4, and both shapes are identical identical, specifically please refer to the description of epimere literal, no longer repeats here.

Be provided with lining 9 in vertical mounting hole 1-1 of Operating valve body 1, lining 9 is by positioning key and Operating valve body 1 relative fixed, linear cam 2 is arranged in the square endoporus of lining 9, lining 9 is provided with the through hole one to one with each horizontal mounting hole 1-2, be provided with feather key 10 between the inwall of the side of linear cam 2 and lining 9, the part of feather key 10 is arranged in the keyway 2-1-1 of linear cam, another part is arranged in vertical chute of lining 9, when linear cam 2 up-and-down movements, feather key 10 moves up and down in vertical chute of lining 9 thereupon, with each curved surface of guaranteeing linear cam 2 horizontal mounting hole 1-2 of alignment effect valve body 1 all the time, prevent that it from deflecting.

The upper end of linear cam 2 is connected by piston rod 5-4 with the control plunger 5-3 of control plunger assembly 5, the upper end of piston rod 5-4 is connected by screw thread pair with control plunger 5-3, and the bottom that control valve body 5-2 is passed in the lower end of piston rod 5-4 is connected by bearing pin 5-5 with the upper end of linear cam 2.

Be provided with stabilizing spring 6 between control plunger assembly 5 and the linear cam 2, an end of stabilizing spring 6 is supported on the bottom of control plunger assembly 5, and the other end is supported on the stabilizing spring seat on linear cam 2 tops.

There is lower cover 1-3 the bottom of Operating valve body 1 by screw retention, lower cover 1-3 covers the lower ending opening of vertical mounting hole 1-1, its inside is provided with retarding spring 7, the upper end of retarding spring 7 is supported on the retarding spring seat inner bottom surface of linear cam 2 bottoms, and the lower end of retarding spring 7 is supported on the inner bottom surface of lower cover 1-3.

The lower end of linear cam 2 is by the stroke measurment bar 8 co-axially fixed with it that be threaded, and the protruding certain distance in bottom surface of lower cover 1-3 is passed in the lower end of stroke measurment bar 8, and when linear cam 2 up-and-down movements, stroke measurment bar 8 can be flexible together thereupon.

Shutoff valve 3 is from the outside port of each the horizontal mounting hole 1-2 Operating valve body 1 of packing into, the control curved surface 2-1 of linear cam 2, control curved surface 2-2 and control curved surface 2-12 are positioned at the same side, the corresponding with it shutoff valve 3-1 of difference, shutoff valve 3-2 and shutoff valve 3-12 also are installed in three horizontal mounting holes of Operating valve body 1 same side, because control curved surface 2-1, control curved surface 2-2 and control curved surface 2-12 spatially stagger mutually, for ease of with control curved surface 2-1, control curved surface 2-2 and control curved surface 2-12 aim at, shutoff valve 3-1, shutoff valve 3-2 and shutoff valve 3-12 and horizontal mounting hole thereof also stagger mutually, and concrete form as shown in the figure.In the present embodiment, according to the requirement of brake control valve to function, the horizontal mounting hole of shutoff valve 12 tops is in idle state, and shutoff valve or detent mechanism are not installed.

The control curved surface 2-3 of linear cam 2, location curved surface 2-4 and control curved surface 2-5 are positioned at the same side, corresponding with it respectively shutoff valve 3-3, detent mechanism 4-4 and shutoff valve 3-5 also are installed in the horizontal mounting hole of Operating valve body 1 same side, wherein the quantity of detent mechanism 4-4 is two, corresponds respectively to the upper and lower part of location curved surface 2-4.

The control curved surface 2-6 of linear cam 2, control curved surface 2-7 and control curved surface 2-8 are positioned at the same side, corresponding with it respectively shutoff valve 3-6, shutoff valve 3-7 and shutoff valve 3-8 also are installed in the horizontal mounting hole of Operating valve body 1 same side, wherein the quantity of shutoff valve 3-7 is two, corresponds respectively to the upper and lower part of control curved surface 2-7.

The control curved surface 2-9 of linear cam 2, location curved surface 2-10 and control curved surface 2-11 are positioned at the same side, corresponding with it respectively shutoff valve 3-9, detent mechanism 4-10 and shutoff valve 3-11 also are installed in the horizontal mounting hole of Operating valve body 1 same side, wherein the quantity of detent mechanism 4-10 is two, corresponds respectively to the upper and lower part of location curved surface 2-10.

Here need to prove, in the ordinary course of things, each control curved surface (or location curved surface) correspondence is also controlled a shutoff valve (or detent mechanism), and in the present embodiment, control curved surface 7 can be controlled two shutoff valves simultaneously, and location curved surface 4 and location curved surface 10 can match with two detent mechanisms, that is to say, have in control curved surface under the condition of sufficient length, its control curved surface can be controlled a plurality of shutoff valves simultaneously or match with a plurality of detent mechanisms.

Please refer to Figure 13,14, Figure 13 is the structural representation of detent mechanism; Figure 14 is the cutaway view of detent mechanism shown in Figure 13.

The base portion of detent mechanism 4-4 is positioning mandril cover 4-1-1, and the one end is provided with negative thread, the other end is provided with seam, and positioning mandril 4-1-2, retainer spring 4-1-3 and location adjusting lever 4-1-4 successively pack in the inside of positioning mandril cover 4-1-1.

The end of positioning mandril 4-1-2 is protruding through the seam of positioning mandril cover 4-1-1, and is provided with energy free rolling spheroid 4-1-5.

The end of location adjusting lever 4-1-4 is provided with outside thread and screws in positioning mandril cover 4-1-1, and the end of retainer spring 4-1-4 is supported on the spacing axle collar of positioning mandril 4-1-2, and the other end is supported on the thread end of location adjusting lever 4-1-4.

Positioning mandril can freely stretch within the specific limits, its afterbody inserts in the slide opening of location adjusting lever 4-1-4, can play certain directional tagging, the afterbody of location adjusting lever 4-1-4 can be retained in the outside of Operating valve body 1, and have two side planes, so that externally the adjustment dynamics is regulated by instrument.

After detent mechanism 4-4 is in place, spheroid 4-1-5 in the elastic force effect lower support of retainer spring 4-1-3 on the curved surface of the location of linear cam 2, can cooperate the different resistance of generation to stop control plunger to move with auditory localization cues, thereby linear cam 2 is remained on different active positions.

The structure of detent mechanism 4-10 is identical with detent mechanism 4-4, because both symmetric arrangement, both pressure should equate when therefore adjusting.

Please refer to Figure 15, Figure 16, Figure 15 is the structural representation of shutoff valve; Figure 16 is the cutaway view of shutoff valve shown in Figure 15.

The base portion of shutoff valve 3-3 is valve pocket 3-3-1, and the inside of valve pocket 3-3-1 is provided with first chamber and second chamber.

Sandwich valve 3-3-2 is positioned at first chamber, its outside is provided with the first spring 3-3-3, the end of the first spring 3-3-3 is supported on the sandwich valve 3-3-2, the other end is supported on by on the spacing spring perch 3-3-4 of back-up ring, and sandwich valve 3-3-2 is in the effect lower support of the first spring 3-3-3 bottom at first chamber.

Push rod 3-3-5 is positioned at second chamber, its inboard second spring 3-3-6 that is provided with, the end of the second spring 3-3-6 is supported on push rod 3-3-5 by on the spacing axle collar 3-3-7 of back-up ring, the other end is supported on the bottom of second chamber, the end of push rod 3-3-5 protruding and be provided with can free rolling spheroid 3-3-8, the other end passes first chamber and aims at sandwich valve 3-3-2 with via 3-3-9 between second chamber.

Be provided with the induction opening 3-3-10 that is connected with via 3-3-9 in the middle of the valve pocket 3-3-1, the cavity wall of first chamber is provided with the deflation hole 3-3-11 that is connected with the outboard chambers of sandwich valve 3-3-2.

Be provided with sliding ring 3-3-12 between push rod 3-3-5 and the via 3-3-9, to prevent that air-flow from leaking at the via place, the outer circumference surface of valve pocket 3-3-1 is provided with the seal ring 3-3-13 that twice lay respectively at the induction opening both sides, is used to prevent that air-flow is from the clearance leakage between shutoff valve 3-3 and its horizontal mounting hole.

After shutoff valve 3-3 is in place, its spheroid 3-3-8 in the elastic force effect lower support of the second spring 3-3-6 on the control curved surface 2-1 of linear cam 2, when push rod 3-3-5 inwardly withdraws under the effect of linear cam control curved surface 2-1, sandwich valve 3-3-2 can be opened, make induction opening 3-3-10 and deflation hole 3-3-11 conducting, spheroid 3-3-8 can be converted to friction of rolling with the slide relative friction between push rod 3-3-5 and the linear cam control curved surface 2-1, thereby reduce intermetallic wearing and tearing, avoid causing variety of issue because of wearing and tearing.

Operating valve body 1 is provided with admission port 1-1-10 and the exhausr port 1-1-11 that is connected with shutoff valve 3-3, wherein admission port 1-1-10 is positioned on the side of the adjacent side of shutoff valve 3-3, the horizontal mounting hole of its place height and shutoff valve 3-3 is consistent, and via passing to horizontal mounting hole with the perpendicular endoporus 1-1-12 of shutoff valve 3-3, endoporus 1-1-12 is connected with the induction opening 3-3-10 of shutoff valve with the horizontal annular space between the mounting hole by shutoff valve 3-3, the baffle plate 11 that has the port with horizontal mounting hole to cover by screw retention respectively on the side of Operating valve body 1 each side, be provided with seal ring between the port of each horizontal mounting hole and the baffle plate 11, exhausr port 1-1-11 is positioned on the baffle plate 11 and over against horizontal mounting hole, the deflation hole 3-3-11 of shutoff valve 3-3 is by the gap between shutoff valve 3-1 and the horizontal mounting hole or directly be communicated with exhausr port 1-1-11 through port, shutoff valve 3-3 is opened or closed to linear cam 2 by control curved surface 2-1 when different active position, realize the break-make to shutoff valve 3-3 place gas circuit.

The rest may be inferred, and the structure of all the other each shutoff valves and gas path layout and shutoff valve 3-3 are basic identical, specifically can for those skilled in the art, more than describe to have reached and can reproduce degree of the present invention with reference to specific descriptions above, just no longer is repeated in this description at this.

Certainly, induction opening and deflation hole can also be arranged on other position of shutoff valve, if the induction opening and the deflation hole orientation of shutoff valve change, then admission port on the Operating valve body and exhausr port are done accommodation thereupon, that is to say, the inlet and outlet direction and the path of linear cam mechanism are not limited to the mode shown in the figure, as long as can form the gas circuit by shutoff valve control on Operating valve body.

Please refer to Figure 17, Figure 18, when Figure 17 is alleviated the position for linear cam is in and the matching relationship scheme drawing of detent mechanism; When Figure 18 is alleviated the position for linear cam is in and the matching relationship scheme drawing of one of them shutoff valve.

Linear cam 2 in the present embodiment has four active positions, see the spheroid position that is represented by dotted lines among the figure, with the position of control plunger in control valve body serves as with reference to being followed successively by from top to bottom: retarder location, pressurize position, braking back, alleviate the position, the inflation of slowing down alleviates the position, be illustrated as and alleviate the position.

Please in the lump with reference to Figure 11, horizontal dotted line is represented the active position of each curved surface among the figure, linear cam 2 by retarder location to pressurize position, braking back, pressure reduction and stable spring by control plunger 5-3 both sides are realized, promptly when retarder location, stablize spring 6 by compression, when the pressure of control plunger 5-3 both sides near the time, stablize spring 6 and promote pistons and move down and arrive pressurize position, braking back.

Linear cam 2 is alleviated the position to alleviating the position by the inflation of slowing down, pressure reduction and deceleration spring 7 by control plunger 5-3 both sides are realized, promptly when the position is alleviated in the inflation of slowing down deceleration spring 7 by compression, when the pressure reduction of control plunger 5-3 both sides reduced, deceleration spring 7 promoted linear cams 2 and moves up to arrive and alleviate the position.

When different active positions, the curved surface of linear cam 2 is controlled cooresponding shutoff valve and is opened or closed, and realizes opening, closing of different gas circuits.

Because shutoff valve quantity is more, is that example describes its course of action with shutoff valve 3-1 and detent mechanism 4-4 only below, the principle of work of other shutoff valve is similar with it.

1. when control plunger 5-3 drive linear cam 2 moves to retarder location, the control curved surface 2-1 of linear cam 2 has outside lift to the push rod of shutoff valve 3-1, the push rod of shutoff valve 3-1 is outwards moved, back down the sandwich valve in the shutoff valve 3-1, valve port is opened, and the pressure air of auxiliary reservoir is inflated to brake cylinder by valve port.

2. when linear cam 2 is moved down into pressurize position, braking back, the control curved surface 2-1 of linear cam 2 has the inside journey of falling to shutoff valve 3-1 push rod, the push rod of shutoff valve 3-1 is moved right, sandwich valve in the shutoff valve 3-1 moves inward under action of the spring, valve port is closed, the pressure air of auxiliary reservoir cuts off to the path that brake cylinder fills wind by valve port, and auxiliary reservoir can not be inflated to brake cylinder.

3. when linear cam 2 moves to the alleviation position and slow down inflation alleviation position, the control curved surface 2-1 of linear cam 2 does not have outside or inside lift to the push rod of shutoff valve 3-1, sandwich valve in the shutoff valve 3-1 is not backed down, valve port is closed, the pressure air of auxiliary reservoir cuts off to the path that brake cylinder fills wind by valve port, and auxiliary reservoir can not be inflated to brake cylinder.

The effect of each shutoff valve and the on off state when different active position thereof, see the following form:

Certainly, the linear cam of linear cam mechanism provided by the present invention does not limit to and the above-mentioned specific embodiment, requirement according to controllable function, its cross-sectional plane can be designed to other shape, and correspondingly, the shape of Operating valve body also can be done adaptive change thereupon, for example linear cam can be have four sides cylindrical, the shape of Operating valve body is also cylindrical, and perhaps linear cam can be the polygon that has a plurality of sides, and the shape of Operating valve body also is polygon or the like.

In addition; this paper is illustrated the structure of detent mechanism and shutoff valve by way of example; but the concrete form to detent mechanism and shutoff valve is not done qualification, and every detent mechanism that can match with the location curved surface and the control curved surface of linear cam and shutoff valve are all within protection scope of the present invention.

Except that above-mentioned linear cam mechanism, the present invention also provides a kind of brake control valve, and this brake control valve comprises above-mentioned linear cam mechanism, controls the break-make of its gas circuit by linear cam mechanism, and all the other structures please refer to prior art, and this paper repeats no more.

More than brake control valve provided by the present invention and linear cam mechanism thereof are described in detail.Used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand core concept of the present invention.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.

Claims

1. a linear cam mechanism is used for brake control valve, it is characterized in that, comprising:

2. linear cam mechanism according to claim 1, it is characterized in that, described detent mechanism comprises that an end is provided with negative thread, the other end is provided with the positioning mandril cover of seam, the inside of described positioning mandril cover is provided with positioning mandril successively, retainer spring and location adjusting lever, one end of described positioning mandril through described seam protruding and be provided with can free rolling spheroid, one end of described location adjusting lever is provided with outside thread and screws in described positioning mandril cover, one end of described retainer spring is supported on the spacing axle collar of described positioning mandril, and the other end is supported on the thread end of described location adjusting lever; Described spheroid in the elastic force effect lower support of retainer spring on the curved surface of the location of described linear cam.

3. linear cam mechanism according to claim 1 is characterized in that, described shutoff valve comprises the valve pocket with first chamber and second chamber; The sandwich valve outside in described first chamber is provided with first spring, one end of described first spring is supported on the described sandwich valve, the other end is supported on by on the spacing spring perch of back-up ring, and described sandwich valve is in the effect lower support of first spring bottom at described first chamber; Push rod inboard in described second chamber is provided with second spring, one end of described second spring is supported on described push rod by on the spacing axle collar of back-up ring, the other end is supported on the bottom of described second chamber, one end of described push rod is protruding and be provided with energy free rolling spheroid, and the other end passes described first chamber and aims at described sandwich valve with the via between second chamber; Be provided with sliding ring between described push rod and the via, be provided with the induction opening that is connected with described via in the middle of the described valve pocket, the cavity wall of described first chamber is provided with the deflation hole that is connected with the outboard chambers of described sandwich valve; The outer circumference surface of described valve pocket is provided with the seal ring that twice lay respectively at described induction opening both sides.

4. linear cam mechanism according to claim 3 is characterized in that, each admission port on the described Operating valve body is connected with the induction opening of each described shutoff valve via endoporus; Each exhausr port on the described Operating valve body is positioned on the baffle plate that is fixed on described Operating valve body side, is connected in the end with the deflation hole of each described shutoff valve.

5. according to each described linear cam mechanism of claim 1 to 4, it is characterized in that, described linear cam is the square that middle part, each limit has rectangular preiection on cross-sectional plane, its each side all have two mutually concordant sides and one in the centre to the side of outer lug.

6. linear cam mechanism according to claim 5, it is characterized in that, control curved surface on the described linear cam is formed by the outer convex surface on its side, place and the side, be transition cambered surface or transition inclined-plane between described outer convex surface and the side, location curved surface on the described linear cam is formed by the side at its place and the inner concave on the side, is transition cambered surface or transition inclined-plane between described inner concave and the side.

7. linear cam mechanism according to claim 6, it is characterized in that, be provided with stabilizing spring between described linear cam and the described control plunger assembly, one end of described stabilizing spring is supported on the control valve body bottom of described control plunger assembly, and the other end is supported on the stabilizing spring seat on described linear cam top; Be provided with retarding spring in the lower cover of described Operating valve body bottom, an end of described retarding spring is supported on the retarding spring seat inner bottom surface of described linear cam bottom, and the other end is supported on the inner bottom surface of described lower cover.

8. linear cam mechanism according to claim 7, it is characterized in that, be provided with lining in vertical mounting hole of described Operating valve body, described linear cam is arranged in the polygon endoporus of described lining, and described lining is provided with and described horizontal mounting hole through hole one to one.

9. linear cam mechanism according to claim 8, it is characterized in that, be provided with feather key between the side of described linear cam and the inwall of described lining, the part of described feather key is arranged in the keyway of described linear cam, and another part is arranged in vertical chute of described lining.

10. a brake control valve is characterized in that, comprises aforesaid right requirement 1 to 9 each described linear cam mechanism.