CN203585299U - Control changeover valve for traveling speeds of engineering machinery - Google Patents
Control changeover valve for traveling speeds of engineering machinery Download PDFInfo
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- CN203585299U CN203585299U CN201320760390.3U CN201320760390U CN203585299U CN 203585299 U CN203585299 U CN 203585299U CN 201320760390 U CN201320760390 U CN 201320760390U CN 203585299 U CN203585299 U CN 203585299U
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- spool
- boss
- engineering machinery
- changeover valve
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Abstract
The utility model discloses a control changeover valve for traveling speeds of engineering machinery. Oil feeding channels and oil draining channels of two motors are arranged on the same valve body; by the structure design of the changeover valve and a system matching design, the speeds of the engineering machinery can be changed over and regulated under the work conditions that a device normally works, namely, the device is not required to be stopped; and a controlled hydraulic speed regulating range of the engineering machinery can be broadened, stepless speed changing can be realized, the speeds of the engineering machinery are changed over simply and stably without shock, and the service life of a hydraulic system is prolonged. By using the control changeover valve, a series-connection function and a parallel-connection function of a hydraulic motor system are integrated, and the integration level is high. Moreover, a safety valve can be arranged on the changeover valve in an integrated manner, so that a safety protection function of a work loop of the system is fulfilled.
Description
Technical field
The utility model relates to mechanical field, especially a kind of moving speed of engineering machine control switching valve.
Background technique
At present, moving speed of engineering machine control mode has mechanical transmission, hydraudynamic drive, hydraulic transmission and combining form thereof etc.Although mechanical transmission efficiency is high, speed regulation range is little and can only realize a grade transmission; Consider Economy, the general kind of drive of mating with mechanical transmission that adopts of hydraudynamic drive, its starting torque is large, but efficient district is narrow; The hydraulic driving stepless change of vehicle has become an important development trend of modern project machinery.Hydraulic transmission can be combined with mechanical gear box and inter-wheel differential, but can not thoroughly improve performance and the traction power characteristic of mechanical running mechanism; Hydraulic transmission, can realize stepless change, but speed adjustable range is little, can not obtain larger travelling speed; Hydraulic transmission coordinates wheel-side reduction device, can expand its speed adjustable range, but drive system structure complexity, cost is high.
Summary of the invention
The purpose of this utility model is: a kind of moving speed of engineering machine control switching valve is provided, it is switched to slowly running under parallel way by oil hydraulic motor in the high speed rotating under serial fashion, realize the stepless change in two-stage velocity range, to overcome the deficiencies in the prior art.
The utility model is achieved in that moving speed of engineering machine control switching valve, comprise valve body, in valve body, be provided with 4 cavitys that are from left to right arranged in order and are communicated with successively, on first cavity of left side, be connected with right motor vent line and oil circuit, on the cavity of second, left side, be connected with left motor vent line, on first cavity of right side, be connected with left motor in-line and in-line, on the cavity of second, right side, be connected with right motor in-line; In valve body, be provided with the spool through 4 cavitys, at spool, be provided with 3 boss, link position between first boss correspondence first cavity of left side and second, the left side cavity in spool left side, link position between second second, left side of boss correspondence cavity in spool left side and second, right side cavity, the link position between the 3rd boss correspondence first cavity of right side and second, the right side cavity in spool left side; When spool moves to the valve body rightmost side, isolated by second boss in spool left side between second cavity in second, left side cavity and right side, between all the other cavitys, be communicated with; When spool moves to the valve body leftmost side, isolated by first boss in spool left side between first cavity of left side and second, left side cavity, isolated by the 3rd boss in spool left side between second cavity in first cavity of right side and right side, between second cavity in second, left side cavity and right side, be communicated with.
Left end one end at spool is provided with spring, spring precompression, and spool is in right-hand member work, and guide's fluid enters spool right-hand member makes spool in left end work.
Adopt hydraulic driving, do not changing on the basis of oil hydraulic pump and oil hydraulic motor model, can, by operation the utility model switching valve, control the output flow of oil hydraulic pump, realize oil hydraulic motor and work at serial fashion and under parallel way, realize the stepless change in two-stage velocity range.
Owing to having adopted technique scheme; compared with prior art; the utility model adopt on same valve body, arrange two groups of motors into and out of oil circuit; by switch valve structure, design and system matches design; can realize in the normal work of actuating device and need not shut down under the operating mode of work; carry out switching and the adjusting of speed; can expand the speed adjustable range of engineering machinery hydraulic speed control; and can realize stepless change; make engineering machinery speed handover operation simple; speed is switched steadily nothing impact, the working life of improving hydraulic system.The utility model is integrated in one the series and parallel connections function that realizes system, and level of integration is high, and all right integrated security valve on this switching valve, realizes the safety protection function in system works loop simultaneously.The utility model compared with the existing technology, there is following characteristics: (1) simplifies machine drive mechanism, by fixed (change) amount hydraulic pump drive fixed (change) amount motor, realize hydraulic speed-changing, in drive line, do not need to arrange synchronizer and can realize shock-free speed switching; (2) under the operating conditions that need not shut down at oil hydraulic pump and oil hydraulic motor, can realize the switching of speed, and switch steadily; (3), under the quantity and model that do not change oil hydraulic pump and oil hydraulic motor, by the operation of switching valve, can expand the speed adjustable range of system; (4) it can realize stepless change compared with mechanical transmission, and speed governing is convenient; (5) this switching valve level of integration is high, and cost of production is lower, and manipulation is simple, can work alone.The utility model can be widely used in self-propelled type engineering machinery enclosed walking system, need the large and actuator of speed adjustable range need not out-of-work enclosed or open system in, as engineering machinery such as excavator, loader, road roller, pavers, by electric liquid pilot control, also can realize easily remote operation and automatically control, there is simple in structure, easy to operate, cost performance advantages of higher, can be widely used in engineering machinery field.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present utility model;
Accompanying drawing 2 is the A-A sectional view of accompanying drawing 1;
Accompanying drawing 3 is the perspective view of accompanying drawing 1;
Accompanying drawing 4 is asphalt principle figure of the present utility model.
Embodiment
Embodiment of the present utility model: moving speed of engineering machine control switching valve, comprise valve body 1, in valve body 1, be provided with 4 cavitys 2 that are from left to right arranged in order and are communicated with successively, on first cavity 2 of left side, be connected with right motor vent line B2 and oil circuit T, on the cavity 2 of second, left side, be connected with left motor vent line B1, on first cavity 2 of right side, be connected with left motor in-line A1 and in-line P, on the cavity 2 of second, right side, be connected with right motor in-line A2; In valve body 1, be provided with the spool 3 through 4 cavitys 2, at spool 3, be provided with 3 boss 4, link position between corresponding first cavity 2 of left side of first boss 4 and second, the left side cavity 2 in spool 3 left sides, link position between second boss 4, second cavity 2 in corresponding left side and second, the right side cavity 2 in spool 3 left sides, the link position between the 3rd first cavity 2 of the corresponding right side of boss 4 and second, the right side cavity 2 in spool 3 left sides; When spool 3 moves to the valve body rightmost side, isolated by second boss 4 in spool 3 left sides between second cavity 2 in second, left side cavity 2 and right side, between all the other cavitys 2, be communicated with; When spool 3 moves to the valve body leftmost side, isolated by first boss 4 in spool 3 left sides between first cavity 2 of left side and second, left side cavity 2, isolated by the 3rd boss 4 in spool 3 left sides between first cavity 2 of right side and second, right side cavity 2, between second cavity 2 in second, left side cavity 2 and right side, be communicated with; In one end of spool 3, be provided with spring 5, spring 5 precompression, spool 3 is in right-hand member work, and guide's fluid enters spool 3 right-hand members makes spool 3 in left end work.
The utility model is connected on two oil hydraulic motors 6, and its working principle as shown in Figure 4.
Claims (2)
1. a moving speed of engineering machine control switching valve, comprise valve body (1), it is characterized in that: in valve body (1), be provided with 4 cavitys (2) that are from left to right arranged in order and are communicated with successively, on first cavity of left side (2), be connected with right motor vent line (B2) and oil circuit (T), on second cavity in left side (2), be connected with left motor vent line (B1), on first cavity of right side (2), be connected with left motor in-line (A1) and in-line (P), on second cavity in right side (2), be connected with right motor in-line (A2); In valve body (1), be provided with the spool (3) through 4 cavitys (2), at spool (3), be provided with 3 boss (4), link position between first boss (4) first cavity of corresponding left side (2) and second cavity in left side (2) in spool (3) left side, link position between second boss (4), second cavity in corresponding left side (2) and second cavity in right side (2) in spool (3) left side, the link position between the 3rd boss (4) first cavity of corresponding right side (2) and second cavity in right side (2) in spool (3) left side; When spool (3) moves to the valve body rightmost side, isolated by second boss (4) in spool (3) left side between second cavity in second cavity in left side (2) and right side (2), between all the other cavitys (2), be communicated with; When spool (3) moves to the valve body leftmost side, isolated by first boss (4) in spool (3) left side between first cavity of left side (2) and second cavity in left side (2), isolated by the 3rd boss (4) in spool (3) left side between second cavity in first cavity of right side (2) and right side (2), between second cavity in second cavity in left side (2) and right side (2), be communicated with.
2. moving speed of engineering machine control switching valve according to claim 1, it is characterized in that: in left end one end of spool (3), be provided with spring (5), spring (5) precompression, spool (3) is in right-hand member work, and guide's fluid enters spool (3) right-hand member makes spool (3) in left end work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320760390.3U CN203585299U (en) | 2013-11-27 | 2013-11-27 | Control changeover valve for traveling speeds of engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320760390.3U CN203585299U (en) | 2013-11-27 | 2013-11-27 | Control changeover valve for traveling speeds of engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203585299U true CN203585299U (en) | 2014-05-07 |
Family
ID=50583226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320760390.3U Withdrawn - After Issue CN203585299U (en) | 2013-11-27 | 2013-11-27 | Control changeover valve for traveling speeds of engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203585299U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591282A (en) * | 2013-11-27 | 2014-02-19 | 贵州大学 | Engineering machinery walking speed controlling and switching valve |
| CN104343757A (en) * | 2014-10-13 | 2015-02-11 | 浙江三一装备有限公司 | Running gear speed switching control system and engineering machine |
-
2013
- 2013-11-27 CN CN201320760390.3U patent/CN203585299U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591282A (en) * | 2013-11-27 | 2014-02-19 | 贵州大学 | Engineering machinery walking speed controlling and switching valve |
| CN103591282B (en) * | 2013-11-27 | 2016-02-10 | 贵州大学 | Moving speed of engineering machine controls switching valve |
| CN104343757A (en) * | 2014-10-13 | 2015-02-11 | 浙江三一装备有限公司 | Running gear speed switching control system and engineering machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140507 Effective date of abandoning: 20160210 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |