CN203067904U - Preselector valve - Google Patents
Preselector valve Download PDFInfo
- Publication number
- CN203067904U CN203067904U CN 201220747914 CN201220747914U CN203067904U CN 203067904 U CN203067904 U CN 203067904U CN 201220747914 CN201220747914 CN 201220747914 CN 201220747914 U CN201220747914 U CN 201220747914U CN 203067904 U CN203067904 U CN 203067904U
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- CN
- China
- Prior art keywords
- valve
- valve rod
- front sleeve
- preselector
- sleeve
- Prior art date
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- Expired - Fee Related
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Abstract
Provided is a preselector valve. A cam which is connected on the side face of a handle (9) on a valve body (7) through a pin (8) is matched with one end of a long valve rod (10) in a sliding mode. The preselector valve is characterized in that the other end of the long valve rod (10) makes contact with a valve rod (11) arranged inside a middle sleeve (12), the other end of the valve rod (11) stretches out and draws back in a hole of a front sleeve (1) under the action of a main spring (13), closing or separation is achieved between a valve core (16) and an edge opening of the front sleeve (1) under the action of an auxiliary spring (17) and the valve rod (11), the main spring (13) is arranged between the valve rod (11) and the middle sleeve (12), the auxiliary spring (17) is arranged between a spring seat (18) and the valve core (16), and a vent hole (20) in the front sleeve (1) is communicated with a P hole in the valve body (7). The preselector valve is capable of satisfying performance requirements of a large-diameter shift lever on a heavy-duty car, and can achieve performance requirements.
Description
Technical field
The utility model relates to the preselector valve of the gearshift of a kind of air-path control system for heavy-duty car and motorbus.
Background technique
Preselector valve is the important device of the shifting system of the air-path control system of heavy-duty car and motorbus, places in the operator cabin, vertically installs, in order to control the high and low shelves conversion of automobile.It is to change the pressurized air circulating direction by the handle that the driver pulls on the preselector valve, thereby realizes the gear conversion under the automobile different conditions.Its performance directly determines the gearshift performance of automobile.Therefore, preselector valve is the technical measures that relevant heavy-duty car institute must adopt, and from the angle of technical meaning, still is from the angle of economic benefit no matter, all is very important.
The deficiency of existing preselector valve:
(1) because of the preselector valve structural limitations, make the automobile shifting rod restricted diameter that cooperates within 12mm, and this segment length is limited in 86mm; And in actual moving process, diameter is that the gear level of 12mm can produce bending deflection;
(2) because of the restriction of preselector valve length, far away with driver's distance, make that driver's user satisfaction is not good enough, and the gearshift poor-performing;
(3) preselector valve main parts size--behind the valve body die cast, need the machining internal structure, die casting defectives such as surface pinholes and blowby inevitably occur at machining surface, and machine adds precision and difficulty is higher;
(4) processing time consuming effort, cost is higher.
The model utility content
The utility model is exactly for overcoming the deficiency that prior art exists, a kind of reasonable in design is provided, the preselector valve of gearshift superior performance.
The technical solution that realizes above-mentioned purpose is:
This preselector valve comprises valve body, valve handle, handle, the cam that is connected the handle side on the valve body by pin is slidingly matched with long valve rod termination, it mainly is that the other end of long valve rod contacts with the valve rod that is positioned at middle sleeve, the other end of said valve rod is flexible in the hole at front sleeve under the effect of main spring, and a spool is realized sealing or disengaging with the bead of said front sleeve under the effect of auxiliary spring and valve rod; Said main spring is between valve rod and middle sleeve; Said auxiliary spring is between spring seat and spool; The vent of said front sleeve communicates with P hole on the valve body.
Its further technical solution is:
Said valve rod is the half hollow cylindrical structures, and the valve rod front end can stretch into the external diameter of front sleeve part less than the external diameter of valve stem body.
Said long valve rod is with supporting drum outward, and the termination of supporting drum connects guide cylinder and lining.
Be provided with large washer between said middle sleeve and the supporting drum and between middle sleeve and the front sleeve.
Between said front sleeve and the valve body, be respectively equipped with O-ring seals between front sleeve and the valve rod.
Be arranged with exhaust port on the said front sleeve, this exhaust port and valve rod front end can stretch into and form an air-flow path between the part of front sleeve and the front sleeve.
The bead of said front sleeve is an annular projection that protrudes from the front sleeve end face.
Corresponding vent place, the bottom of said valve body has a steel ball that can prevent gas leakage.
The good effect that the utility model produces is:
(1) can satisfy the cooperation requirement of the large diameter gear level on the heavy-duty car;
(2) can satisfy the comfort requirement that the driver shifts gears on the heavy-duty car;
(3) can realize the performance requirement of preselector valve, namely realize the high and low shift conversion function of automobile;
(4) step hole is adopted and with the form of steel ball extruding, difficulty of processing reduces greatly in valve body S hole, and quality of processing is guaranteed that work efficiency improves greatly
(5) quality promotes greatly, once assembles the more existing preselector valve of up-to-standard rate and improves a lot.
Description of drawings
Fig. 1 is the structural representation of the utility model when low-grade location.
Fig. 2 is the structural representation of the utility model when high tap position.
Fig. 3 is the location diagram in S hole in the utility model, P hole and E hole.
Embodiment
This preselector valve comprises valve body 7, handle 9, front sleeve 1, valve rod 11, large washer 3, middle sleeve 12, supporting drum 4, guide cylinder 5, lining 6, long valve rod 10, spool 16, rapid pipe joint 19, spring seat 18, pays spring 17, main spring 13, pin 8, steel ball 15 and O-ring seals 2, vent 20, bleeder port 21, seal ring 14.
Fig. 1 shows overall structure of the present utility model.In the through hole (referring to the S hole among Fig. 3) of valve body 7 bottoms, from handle 9 guide cylinder 5, lining 6, long valve rod 10, valve rod 11, spool 16, auxiliary spring 17, spring seat 18 and rapid pipe joint 19 are installed successively left.Wherein, guide cylinder 5 and lining 6 are done the closing in shutoff with this S hole, and an end of long valve rod 10 stretches out outside the lining 6 and contacts with the cam of handle 9 sides.Outside long valve rod 10, be with supporting drum 4, have the gap between supporting drum 4 and the long valve rod 10, an end in contact of the other end of long valve rod 10 and valve rod 11.Valve rod 11 is outer to be with middle sleeve 12 and main spring 13 and front sleeve 1, and the diameter of valve rod 11 front portions forms step shape less than the diameter of valve rod 11 bodies, and can be in the center hole of front sleeve 1 fore and aft motion.The ring-type bead interoperation of spool of being made by rubber or Buddhist nun's logical sequence elastomeric material 16 and front sleeve 1 center hole projection can will enter the air-flow complete closed in S hole when spool 16 closely contacts with the bead of front sleeve 1; The bead of spool 16 and front sleeve 1 can make air-flow pass through from step and valve rod 11 inside of valve rod 11 when breaking away from.An auxiliary spring 17 is installed between spool 16 and the spring seat 18, by rapid pipe joint 19 spring seat 18 is fixed in the S hole and locatees.
Corresponding position in front sleeve 1 is provided with the vent 20 that can communicate with the P hole (referring to Fig. 3) of valve body 7; In the cavity of valve rod 11, be provided with a bleeder port 21 that can be communicated with the E hole gas circuit of valve body 7.
Shown in Figure 1 is the configuration state of the utility model when low-grade location.S hole and P hole that the plastic tube that two diameters are 4mm inserts preselector valve respectively are full of the gas of the 0.41MPa of automotive system always in the S hole.When depressing handle 9, the cam of handle 9 sides promotes valve rod 11 by long valve rod 10 and moves simultaneously, compresses main spring 13 simultaneously, makes the valve rod 11 anterior carefully step places of diameters stretch out the bead of front sleeve 1, promotes spool 16 compression auxiliary springs 17.This moment, spool 16 broke away from the bead of front sleeve 1, gas in the S hole will be by front sleeve 1 and valve rod 11 front portions the step place and front sleeve 1 between the space that forms enter, at this moment, O-ring seals 2 and the seal ring 14 between front sleeve 1 and valve rod 11 have been blocked the path of gas towards the E hole, and enter the P hole through the vent 20 that is positioned at valve body 7, finish by the conversion of top grade to low grade.
As shown in Figure 2, when being converted to top grade as need by low grade, lift handle 9, valve rod 11 and long valve rod 10 automatically reset under the effect of main spring 13, auxiliary spring 17 promotes spool 16 and combines closely with the bead of front sleeve 1 again, realizes sealing function, makes S hole internal gas and P hole block; And the residual air in the P hole is led to main spring 13 regions by the bleeder port 21 in the middle of the valve rod 6, and this zone links to each other with the E hole of valve body 7 by auxiliary hole, finishes residual air to the exhaust in E hole, and the E hole communicates with atmosphere.
Claims (8)
1. preselector valve, comprise valve body (7), handle (9), the cam that is connected handle (9) side on the valve body (7) by pin (8) is slidingly matched with long valve rod (10) termination, the other end that it is characterized in that long valve rod (10) contacts with the valve rod that is positioned at middle sleeve (12) (11), the other end of described valve rod (11) is flexible in the hole of front sleeve (1) under the effect of main spring (13), and a spool (16) is realized sealing with the bead of described front sleeve (1) or broken away under the effect of auxiliary spring (17) and valve rod (11); Described main spring (13) is positioned between valve rod (11) and the middle sleeve (12); Described auxiliary spring (17) is positioned between spring seat (18) and the spool (16); Vent (20) on the described front sleeve (1) communicates with P hole on the valve body (7).
2. preselector valve according to claim 1, it is characterized in that valve rod (11) is the half hollow cylindrical structures, valve rod (11) front end can stretch into the external diameter of front sleeve (1) part less than the external diameter of valve rod (11) body, also is provided with a bleeder port that is communicated with the E hole (21) in the cavity of valve rod (11).
3. preselector valve according to claim 1 is characterized in that at the said supporting drum (4) that is with outside long valve rod (10), and the termination of supporting drum (4) connects guide cylinder (5) and lining (6).
4. preselector valve according to claim 1 is characterized in that being provided with large washer (3) between said middle sleeve (12) and the supporting drum (4) and between middle sleeve (12) and the front sleeve (1).
5. preselector valve according to claim 1 is characterized in that between said front sleeve (1) and the valve body (7), is respectively equipped with O-ring seals (2) between front sleeve (1) and the valve rod (11).
6. preselector valve according to claim 1, it is characterized in that being arranged with on the said front sleeve (1) vent (20), this exhaust port (20) and valve rod (11) front end can stretch into and form an air-flow path between the step part of front sleeve (1) and the front sleeve (1).
7. preselector valve according to claim 1 or 5, the bead that it is characterized in that said front sleeve (1) is an annular projection that protrudes from front sleeve (1) end face.
8. preselector valve according to claim 1 is characterized in that the corresponding vent in bottom (20) of said valve body (7) locates to have a steel ball (15) that can prevent gas leakage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220747914 CN203067904U (en) | 2012-12-31 | 2012-12-31 | Preselector valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220747914 CN203067904U (en) | 2012-12-31 | 2012-12-31 | Preselector valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203067904U true CN203067904U (en) | 2013-07-17 |
Family
ID=48766688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220747914 Expired - Fee Related CN203067904U (en) | 2012-12-31 | 2012-12-31 | Preselector valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203067904U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912713A (en) * | 2012-12-31 | 2014-07-09 | 西安航天远征流体控制股份有限公司 | Pre-selection valve |
-
2012
- 2012-12-31 CN CN 201220747914 patent/CN203067904U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912713A (en) * | 2012-12-31 | 2014-07-09 | 西安航天远征流体控制股份有限公司 | Pre-selection valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130717 Termination date: 20131231 |