CN204004732U - The positioning device of hand reducing pressure formula proportional pilot valve - Google Patents
The positioning device of hand reducing pressure formula proportional pilot valve Download PDFInfo
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- CN204004732U CN204004732U CN201420382982.0U CN201420382982U CN204004732U CN 204004732 U CN204004732 U CN 204004732U CN 201420382982 U CN201420382982 U CN 201420382982U CN 204004732 U CN204004732 U CN 204004732U
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- positioning seat
- pressing plate
- pad
- pilot valve
- locking ball
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Abstract
A positioning device for hand reducing pressure formula proportional pilot valve, universal joint is fixedly connected with pressing plate, and pressing plate and pad join, and by pressing plate, the working position of pad are limited; Pressing plate is for cover shape, its lid shape inwall be fixed on valve body positioning seat and join, while forming presser motion, it covers the structure that shape inwall joins with positioning seat all the time; Be provided with locking ball and supported spring at pressing plate, locking ball reaches the position joining with positioning seat outer wall under the elastic force effect of supported spring outside lid shape inwall; The outer wall of positioning seat is provided with at least one positioning seat locating groove, positioning seat locating groove is in the time that locking ball slips into positioning seat locating groove, its draw-in groove resistance is greater than controls the upwards thrust that spool, Returnning spring and hydraulic coupling apply pad, during prevention handle returns, the working position of pad is limited; Its advantage is simple in structure, and it is reliable with accurate positioning that steering force is adjustable.
Description
Technical field
The utility model relates to one and is applied to loader, the positioning device of the hand reducing pressure formula proportional pilot valve in the engineering machinery such as bulldozer, hoist, excavator, loader-digger.
Background technique
The engineering machinery such as current loader, bulldozer, hoist, loader-digger extensively adopt, the main preventing control valve core motion of guide oil control providing by hand reducing pressure formula proportional pilot valve, and then control swing arm lifting and decline, scraper bowl receipts bucket and discharging.At present, the positioning device of widely used proportion pilot control valve mainly contains two kinds: 1) without positioning device; 2) adopt electromagnet location, in the time that handle swings to set angle, by energising makes it produce magnetic force to electromagnet, hold the sucker being fixed on handle fork and fix handle position.
When above-mentioned engineering mechanism is worked, the operating time that its swing arm lifting, decline and scraper bowl receipts struggle against is relatively long, steering force is larger, if manually operated type proportional pilot valve is without positioning device, in work, operator just must use manual control handle always, easily causes operator's fatigue, reduces working efficiency.Electromagnet positioning form complex structure, that electromagnetic attraction is affected by voltage and ambient temperature is larger, and suction is difficult to accurately control; In addition, adopt electromagnet location can increase pilot valve body leakage of oil point, strengthen technical difficulty.
Model utility content
The purpose of this utility model is just to provide a kind of positioning device of simple in structure, the reliable hand reducing pressure formula of accurate positioning proportional pilot valve
Solution of the present utility model is such:
A kind of positioning device of hand reducing pressure formula proportional pilot valve, valve body is provided with the decompression type forerunner proportional control valve including pad, spring seat, Returnning spring, pressure adjusting spring, spool and the handle operation mechanism including handle, universal joint, it is characterized in that: described universal joint is fixedly connected with pressing plate, described pressing plate and described pad join, and by pressing plate, the working position of pad are limited; Described pressing plate is for cover shape, its lid shape inwall be fixed on valve body positioning seat and join, while forming presser motion, it covers the structure that shape inwall joins with positioning seat all the time; Be provided with locking ball and supported spring at pressing plate, described locking ball reaches the position joining with positioning seat outer wall under the elastic force effect of supported spring outside lid shape inwall; The outer wall of described positioning seat is provided with at least one positioning seat locating groove, described positioning seat locating groove is in the time that locking ball slips into positioning seat locating groove, its draw-in groove resistance is greater than controls the upwards thrust that spool, Returnning spring and hydraulic coupling apply pad, during prevention handle returns, the working position of pad is limited.In the time that manipulation press plate rotary slips into positioning seat locating groove to locking ball, locking ball enters in positioning seat locating groove under the spring-force driven dual of supported spring, overcome and control during upwards thrust prevention handle handle that spool, Returnning spring and hydraulic coupling apply pad returns, thereby realize machinery location accurately, the size of positioning means detent force can be adjusted by the rigidity of change supported spring according to user's actual demand, and while realizing locating function, pad can adjust by changing positioning seat locating groove position to bottom offset.
Technological scheme also comprises more specifically: the lid shape inner wall surface of described pressing plate is sphere, and described positioning seat outer surface face is the curved surface coordinating with platen cover shape inwall sphere, and when presser motion, its lid shape inwall joins with positioning seat all the time.
Further: the positioning seat locating groove of described positioning seat outer wall setting is ring-type.
Further: the positioning seat locating groove of described positioning seat outer wall setting is the single draw-in groove of independence arranging in relevant position.
Further: described pressing plate and pad connecting part are cambered surface.
Further: described pressing plate has screw, described locking ball is positioned in screw, the outside plug screw that connects of screw, and described spring is positioned between locking ball and plug screw.
Further: described positioning seat locating groove is shaped as the one of arc, V-arrangement, rectangle
The utility model has the advantages that simple in structure, steering force is adjustable with accurate positioning reliable.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of pressing plate 2.
Fig. 3 is embodiment's 1 structural representation of positioning seat 6.
Fig. 4 is embodiment's 2 structural representations of positioning seat 6.
Fig. 5 is the independent notch schematic diagram of the enforcement of positioning seat 6.
1. nuts in figure, 2. pressing plate, 3. plug screw, 4. supported spring, 5. locking ball, 6. positioning seat, 7. pad, 8. spring seat, 9. Returnning spring, 10. locating groove, hydraulic fluid port P. valve filler opening, hydraulic fluid port 2 and 4. valve actuator ports on pressure adjusting spring, 11. spools, 12. valve import oil ducts, 13. valve bodies, 14. rubber covers, 15. universal joints, 16. handles, 17. positioning seats.
Embodiment
As shown in Figure 1, the mechanical locating function of the utility model embodiment's hand-operated decompression type forerunner proportional control valve, mainly contains the realization that cooperatively interacts of pressing plate 2, plug screw 3, supported spring 4, locking ball 5, positioning seat 6.Pressing plate 2 is fixed on universal joint 15 by nut 1, positioning seat 6 is fixed on valve body 13 by universal joint 15, both surfaces of matching of pressing plate 2 and positioning seat 6 are sphere, supported spring 4 and locking ball 5 pack on positioning seat 6 in mounting hole successively, plug screw 3 is screwed into the interior fixed support spring 4 of tapped hole and locking ball 5 of mounting hole on pressing plate 2, handle 16 is connected with universal joint 15 by screw thread, swing handle 16 makes universal joint 15 follow and swing equal angular to the right with pressing plate 2 fixed thereon to the right, pressing plate bottom cambered surface is being pressed moving down of pad 7 tops, pad 7 lower end part spring seats 8 also move down, Returnning spring 9 is compressed, spool 11 moves down together with following spring seat 8 with pressure adjusting spring 10, in the time that hydraulic fluid port on spool 11 and valve import oil duct 12 are connected, valve oil inlet P is by valve import oil duct 12, spool 11 internal oil channels communicate with valve actuator port 2, pilot valve starts to main control valve fuel feeding control main valve plug motion, continue swing handle 16 to the right, in the time that draw-in groove 17 on pressing plate 2 moves on positioning seat 6 locking ball 5 position, locking ball 5 snaps in draw-in groove 17 under supported spring 4 precompression effects, overcome and control spool 11, the upwards reasoning that Returnning spring 9 and hydraulic coupling apply pad 7 stops in handle 16 times, thereby realize machinery location accurately.
Described pressing plate 2 is for cover shape, its lid shape inwall be fixed on valve body 13 positioning seats 6 and join, when forming pressing plate 2 and moving, it covers the structure that shape inwall joins with positioning seat 6 all the time; Be provided with locking ball 5 and supported spring 4 at pressing plate 2, pressing plate 2 has screw, and described locking ball 6 is positioned in screw, the outside plug screw 3 that connects of screw, and described spring 4 is positioned between locking ball 6 and plug screw 3; Described locking ball 5 reaches the position joining with positioning seat 6 outer walls under the elastic force effect of supported spring 4 outside lid shape inwall; Described positioning seat locating groove 17 is in the time that locking ball 5 slips into positioning seat locating groove 17, its draw-in groove resistance is greater than controls the upwards thrust that spool 11, Returnning spring 9 and hydraulic coupling apply pad 7, in prevention handle 15 times, the working position of pad 7 is limited.
The structure of positioning seat 6 is as shown in Fig. 1,3,4, and its outer surface is to cover with pressing plate 2 curvilinerar figure that shape sphere inwall matches, and the endoporus of positioning seat 6 is fixed on valve body 13 by universal joint 3.
The embodiment of positioning seat 6 has several as follows:
Embodiment 1:
As shown in Figure 3, positioning seat 6 outer surfaces have upper and lower two symmetrical positioning seat locating grooves 17, and positioning seat locating groove 17 is ring-type draw-in groove, realizes the location of two positions.
Embodiment 2:
As shown in Figure 4, positioning seat 6 outer surfaces have top and have a symmetrical positioning seat locating groove 17, and positioning seat locating groove 17 is ring-type draw-in groove, realizes the location of a position.
The large I of detent force of positioning device of the present utility model is adjusted by the rigidity of change supported spring 4 according to user's actual demand, detent force size also can be finely tuned by the pre compressed magnitude of the screw-in depth of change plug screw 3 and then change supported spring 4 in addition, and while realizing locating function, pad 7 can adjust by changing positioning seat locating groove 17 positions on positioning seat 6 to bottom offset.
Embodiment 3:
As shown in Figure 5, the positioning seat locating groove 17 that described positioning seat 6 outer walls arrange is the single draw-in groove of independence arranging in relevant position, and the draw-in groove of the present embodiment is the plane tilting.
Positioning seat locating groove 17 shapes comprise the geometrical shapies such as arc, V-arrangement, rectangle.
Claims (7)
1. the positioning device of a hand reducing pressure formula proportional pilot valve, valve body (13) is provided with decompression type forerunner proportional control valve including pad (7), spring seat (8), Returnning spring (9), pressure adjusting spring (10), spool (11) and the handle operation mechanism including handle (15), universal joint (3), it is characterized in that: described universal joint (3) is fixedly connected with pressing plate (2), described pressing plate (2) joins with described pad (7), by pressing plate (2), the working position of pad (7) is limited; Described pressing plate (2) is for cover shape, its lid shape inwall be fixed on valve body (13) positioning seat (6) and join, while forming pressing plate (2) motion, it covers the structure that shape inwall joins with positioning seat (6) all the time; Be provided with locking ball (5) and supported spring (4) at pressing plate (2), described locking ball (5) reaches the position joining with positioning seat (6) outer wall under the elastic force effect of supported spring (4) outside lid shape inwall; The outer wall of described positioning seat (6) is provided with at least one positioning seat locating groove (17), described positioning seat locating groove (17) is in the time that locking ball (5) slips into positioning seat locating groove (17), its draw-in groove resistance is greater than controls the upwards thrust that spool (11), Returnning spring (9) and hydraulic coupling apply pad (7), prevention handle (15) limits the working position of pad (7) in returning.
2. the positioning device of hand reducing pressure formula proportional pilot valve according to claim 1, it is characterized in that: the lid shape inner wall surface of described pressing plate (2) is sphere, described positioning seat (6) outer surface face is the curved surface coordinating with pressing plate (2) lid shape inwall sphere, and when pressing plate (2) motion, its lid shape inwall joins with positioning seat (6) all the time.
3. the positioning device of hand reducing pressure formula proportional pilot valve according to claim 1, is characterized in that: the positioning seat locating groove (17) that described positioning seat (6) outer wall arranges is ring-type.
4. the positioning device of hand reducing pressure formula proportional pilot valve according to claim 1, is characterized in that: the independence single draw-in groove of the positioning seat locating groove (17) that described positioning seat (6) outer wall arranges for arranging in relevant position.
5. the positioning device of hand reducing pressure formula proportional pilot valve according to claim 1, is characterized in that: described pressing plate (2) is cambered surface with pad (7) connecting part.
6. the positioning device of hand reducing pressure formula proportional pilot valve according to claim 1, it is characterized in that: described pressing plate (2) has screw, described locking ball (6) is positioned in screw, the outside plug screw (3) that connects of screw, described spring (4) is positioned between locking ball (6) and plug screw (3).
7. according to the positioning device of the hand reducing pressure formula proportional pilot valve described in claim 1 or 3 or 4, it is characterized in that: described positioning seat locating groove (17) is shaped as the one of arc, V-arrangement, rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420382982.0U CN204004732U (en) | 2014-07-11 | 2014-07-11 | The positioning device of hand reducing pressure formula proportional pilot valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420382982.0U CN204004732U (en) | 2014-07-11 | 2014-07-11 | The positioning device of hand reducing pressure formula proportional pilot valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204004732U true CN204004732U (en) | 2014-12-10 |
Family
ID=52044735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420382982.0U Active CN204004732U (en) | 2014-07-11 | 2014-07-11 | The positioning device of hand reducing pressure formula proportional pilot valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204004732U (en) |
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2014
- 2014-07-11 CN CN201420382982.0U patent/CN204004732U/en active Active
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |