CN201575228U

CN201575228U - Foot valve

Info

Publication number: CN201575228U
Application number: CN2009202808690U
Authority: CN
Inventors: 王金铂
Original assignee: QINGDAO KAIRUISITONG HYDRAULIC MACHINERY CO Ltd
Current assignee: CHINA QINGDAO LKC HYDRAULIC MACHINERY CO., LTD.
Priority date: 2009-12-15
Filing date: 2009-12-15
Publication date: 2010-09-08
Anticipated expiration: 2019-12-15

Abstract

The utility model provides a foot valve, which comprises a left foot valve and a right foot valve, wherein a middle valve body is installed between the left foot valve and the right foot valve; the left foot valve comprises a valve body; an oil return cavity, an oil inlet cavity and two valve core cavities are formed inside the valve body; the oil return cavity is positioned above the oil inlet cavity; the two valve core cavities are respectively positioned on both sides of the oil return cavity; two oil control ports are formed at the lower end of the valve body; a valve core mechanism is installed inside each valve core cavity; the valve core mechanism comprises a jacking rod, a sheath, a valve core, an adjusting spring, a return spring and a spring seat which are connected; the jacking rod is installed inside the sheath; the spring seat is installed at the lower end of the jacking rod; the spring seat is connected with the valve core; the adjusting spring is installed on the periphery of the adjusting spring; the return spring is installed on the periphery of the adjusting spring; an oil hole and a side hole are formed at the lower end of the valve core; the side hole is communicated with the oil hole; a lever seat is installed on the valve body; the lever seat is connected with a lever body through a first rotating shaft; a pedal is installed on the lever body; and two bolts are installed at the lower part of the lever body.

Description

Foot valve

Technical field

The utility model relates to the foot valve that uses on a kind of excavator.

Background technique

At present, all kinds of control valves that use on the engineering machinery such as existing excavator all are manual control, cause the interior operating stem of operating room various, and when operator worked, regular meeting because of acting hurriedly in a messy situation misoperation took place, and poor stability influences workmanship.

Summary of the invention

The purpose of this utility model provides a kind of foot valve, and it is to control by pin, can reduce operator's manually-operable number of times, reduces the generation of misoperation, thereby, can solve the defective that prior art exists.

The utility model for achieving the above object, be achieved through the following technical solutions: foot valve, comprise left threading valve and right threading valve, between left threading valve and the right threading valve center valve body is installed, the structure of left threading valve and right threading valve is identical, the left threading valve comprises valve body, offer oil back chamber in the valve body, oil suction chamber and two spool chambers, oil back chamber is positioned at the oil suction chamber top, two spool chambers lay respectively at the oil back chamber both sides, spool chamber communicates with oil back chamber and oil suction chamber respectively, two control hydraulic fluid ports are offered in the lower end of valve body, two control hydraulic fluid ports communicate with two spool chambers respectively, a spool mechanism is installed in each spool chamber, spool mechanism is by push rod, sheath, spool, adjust spring, Returnning spring and spring seat connect and compose, push rod is installed in the sheath, the lower end mounting spring seat of push rod, spring seat is connected with spool, the periphery of spool is installed and is adjusted spring, adjust the periphery of spring Returnning spring is installed, the upper end of adjusting spring contacts with spring seat, the lower end of adjusting spring contacts with the boss of spool, the upper end of Returnning spring contacts with spring seat, the lower end of Returnning spring contacts with valve body, and oilhole and side opening are offered in the bottom of spool, and side opening communicates with oilhole, lever seat is installed on the valve body, the upper end of two spool mechanisms passes outside the lever seat, and lever seat is connected with lever body by first rotating shaft, and pedal is installed on the lever body, two bolts are installed in the below of lever body, and two bolts are corresponding one by one with two spool mechanisms.

In order further to realize the purpose of this utility model, can also be by the following technical solutions: pole is installed on the lever seat, housing is installed on the pole, first angular wheel and second angular wheel are installed in the housing, first angular wheel and the engagement of second angular wheel, second rotating shaft is installed on second angular wheel, second rotating shaft and lever seat are rotatably assorted, and offer locating slot on the lever body, installing and locating piece in second rotating shaft, positioning block cooperates with locating slot, first angular wheel is installed hinge base by the end hinge of axle with connecting rod on the center valve body, bent axle is installed on the hinge base, handle is installed, the other end hinge of the crank of bent axle and connecting rod on the bent axle.

Advantage of the present utility model is: it can make the staff utilize the portion of engineering machinery such as foot control system excavator to move, and can alleviate the workload of operator's both hands and reduce operating frequency, thereby, can increase work efficiency and quality, operation safe is reliable.It is a Proportional valve, and characteristic curve is the ratio characteristic, has speed-regulating range width, can guarantee to make multiple directional control valve to rest on the advantage of arbitrary position.The utility model also has compactness simple for structure, advantage cheap for manufacturing cost and easy to use.

Description of drawings

Fig. 1 is a structural representation of the present utility model; Fig. 2 is that the A of Fig. 1 is to the structure for amplifying schematic representation; Fig. 3 is the local structure for amplifying schematic representation of the I of Fig. 2.

Number in the figure: 1 valve body, 2 Returnning springs 3 are adjusted 27 28 connecting rods of spring 4 spools, 5 pad 6 sheaths, 7 push rod 9 bolts, 10 lever body 11 pedals, 12 spill port 13 bolts, 14 lever seat 15 spring seats, 16 screw plug 17 screw plugs, 18 oil inlet hole 19 first rotating shafts, 20 center valve body 21 oil back chambers, 22 oil suction chamber 23 side openings, 24 oilhole 25 housings, 26 first angular wheels, 29 second angular wheels, 30 positioning blocks, 31 second rotating shafts, 32 locating slots, 33 poles, 34 handles, 35 cranks, 36 bent axles, 37 hinge bases, 38 control hydraulic fluid ports, 39 spool chambers.

Embodiment

Foot valve described in the utility model, comprise left threading valve and right threading valve, center valve body 20 is installed between left threading valve and the right threading valve, the structure of left threading valve and right threading valve is identical, the left threading valve comprises valve body 1, offer oil back chamber 21 in the valve body 1, oil suction chamber 22 and two spool chambers 39, oil back chamber 21 is positioned at oil suction chamber 22 tops, two spool chambers 39 lay respectively at oil back chamber 21 both sides, spool chamber 39 communicates with oil back chamber 21 and oil suction chamber 22 respectively, two control hydraulic fluid ports 38 are offered in the lower end of valve body 1, two the control hydraulic fluid port 38 respectively with two spool chambers, 39 corresponding communicating, in each spool chamber 39 a spool mechanism is installed, the structure of two spool mechanisms is identical, spool mechanism is by push rod 7, sheath 6, spool 4, adjust spring 3, Returnning spring 2 and spring seat 15 connect and compose, push rod 7 is installed in the sheath 6, the lower end mounting spring seat 15 of push rod 7, spring seat 15 is connected with the upper end of spool 4, the periphery of spool 4 is installed and is adjusted spring 3, adjust the periphery of spring 3 Returnning spring 2 is installed, the upper end of adjusting spring 3 contacts with spring seat 15, the lower end of adjusting spring 3 contacts with the boss of spool 4, the upper end of Returnning spring 2 contacts with spring seat 15, the lower end of Returnning spring 2 contacts with valve body 1, oilhole 24 and side opening 23 are offered in the bottom of spool 4, side opening 23 communicates with oilhole 24, lever seat 14 is installed on the valve body 1, the upper end of two spool mechanisms passes outside the lever seat 14, lever seat 14 is connected with lever body 10 by first rotating shaft 19, pedal 11 is installed on the lever body 10, it is corresponding one by one with two spool mechanisms that 9, two bolts 9 of two bolts are installed in the below of lever body 10.Center valve body 20 communicates with the oil back chamber 21 and the oil suction chamber 22 of left threading valve and right threading valve respectively.Spool 4 is used for the path between blocking spool chamber 39 and the oil suction chamber 22.

During use, pushes pedals 11, making pedal 11 drive a bolt 9 by lever body 10 moves downward, bolt 9 presses push rod 7, push rod 7 is by spring seat 15 compression reseting springs 2 and adjust spring 3, driving spool 4 simultaneously moves down, side opening 23 is communicated with oil suction chamber 22, side opening 23 is obstructed with spool chamber 39, at this moment, hydraulic oil enters oilhole 24 by oil inlet hole 18 through oil suction chamber 22, and is discharged by control hydraulic fluid port 38, thereby drives the digging arm action of excavator, when unclamping pedal 11, Returnning spring 2 promotes spring seat 15 and push rod 7 moves upward, and pedal 11 moves upward by lever body 10 drive bolts 9 and resets, and spring seat 15 drives spools 4 and moves upward, the path of blocking-up control hydraulic fluid port 38 and oil suction chamber 22, and side opening 23 is communicated with spool chamber 39 again, at this moment, hydraulic oil is through control hydraulic fluid port 38, oilhole 24, side opening 23, spool chamber 39, oil back chamber 21 and spill port 12 are got back to fuel tank; Oppositely step on pedal 11, make pedal 11 drive another bolt 9 and push another spool mechanism, make another spool mechanism by above-mentioned course of action work by lever body 10.

For preventing misoperation, pole 33 is installed on the lever seat 14, housing 25 is installed on the pole 33, first angular wheel 26 and second angular wheel 29 are installed in the housing 25, first

angular wheel

26 and 29 engagements of second angular wheel, second rotating shaft 31 is installed on second angular wheel 29, second rotating shaft 31 is rotatably assorted with lever seat 14, offer locating slot 32 on the lever body 10, installing and locating piece 30 in second rotating shaft 31, positioning block 30 cooperates with locating slot 32, first angular wheel 26 is installed hinge base 37 by the end hinge of axle 27 with connecting rod 28 on the center valve body 20, bent axle 36 is installed on the hinge base 37, handle 34 is installed, the crank 35 of bent axle 36 and the other end hinge of connecting rod 28 on the bent axle 36.When under off working state, can spur handle 34, handle 34 is by bent axle 36 and connecting rod 28, first angular wheel 26 is rotated, first angular wheel 26 drives second angular wheel 29 and rotates, and second angular wheel 29 drives positioning block 30 by second rotating shaft 31 and rotates, and positioning block 30 is cooperated with locating slot 32, at this moment, pedal 11 lockings can't be stepped; When need work, driving handle 34 makes bent axle 36, connecting rod 28, first angular wheel 26, second angular wheel 29 and second rotating shaft, 31 reversing motions downwards, and positioning block 30 and locating slot 32 are broken away from, and recovers the unrestricted motion of pedal 11.

The utility model not technology contents of detailed description is known technology.

Claims

1. foot valve, it is characterized in that: comprise left threading valve and right threading valve, center valve body (20) is installed between left threading valve and the right threading valve, the structure of left threading valve and right threading valve is identical, the left threading valve comprises valve body (1), offer oil back chamber (21) in the valve body (1), oil suction chamber (22) and two spool chambers (39), oil back chamber (21) is positioned at oil suction chamber (22) top, two spool chambers (39) lay respectively at oil back chamber (21) both sides, spool chamber (39) communicates with oil back chamber (21) and oil suction chamber (22) respectively, two control hydraulic fluid ports (38) are offered in the lower end of valve body (1), two control hydraulic fluid ports (38) communicate with two spool chambers (39) respectively, a spool mechanism is installed in each spool chamber (39), spool mechanism is by push rod (7), sheath (6), spool (4), adjust spring (3), Returnning spring (2) and spring seat (15) connect and compose, push rod (7) is installed in the sheath (6), the lower end mounting spring seat (15) of push rod (7), spring seat (15) is connected with spool (4), the periphery of spool (4) is installed and is adjusted spring (3), adjust the periphery of spring (3) Returnning spring (2) is installed, the upper end of adjusting spring (3) contacts with spring seat (15), the lower end of adjusting spring (3) contacts with the boss of spool (4), the upper end of Returnning spring (2) contacts with spring seat (15), the lower end of Returnning spring (2) contacts with valve body (1), oilhole (24) and side opening (23) are offered in the bottom of spool (4), side opening (23) communicates with oilhole (24), valve body (1) is gone up lever seat (14) is installed, the upper end of two spool mechanisms passes outside the lever seat (14), lever seat (14) is connected with lever body (10) by first rotating shaft (19), lever body (10) is gone up pedal (11) is installed, two bolts (9) are installed in the below of lever body (10), and two bolts (9) are corresponding one by one with two spool mechanisms.

2. foot valve according to claim 1, it is characterized in that: lever seat (14) is gone up pole (33) is installed, pole (33) going up installed housing (25), first angular wheel (26) and second angular wheel (29) are installed in the housing (25), first angular wheel (26) and second angular wheel (29) engagement, second angular wheel (29) is gone up second rotating shaft (31) is installed, second rotating shaft (31) is rotatably assorted with lever seat (14), offer locating slot (32) on the lever body (10), installing and locating piece (30) is gone up in second rotating shaft (31), positioning block (30) cooperates with locating slot (32), first angular wheel (26) is by the end hinge of axle (27) with connecting rod (28), center valve body (20) is gone up hinge base (37) is installed, hinge base (37) is gone up bent axle (36) is installed, bent axle (36) is gone up and handle (34) is installed, the crank (35) of bent axle (36) and the other end hinge of connecting rod (28).