CN202468507U - Novel speed change operating valve of loading machine - Google Patents

Novel speed change operating valve of loading machine Download PDF

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Publication number
CN202468507U
CN202468507U CN2012200335637U CN201220033563U CN202468507U CN 202468507 U CN202468507 U CN 202468507U CN 2012200335637 U CN2012200335637 U CN 2012200335637U CN 201220033563 U CN201220033563 U CN 201220033563U CN 202468507 U CN202468507 U CN 202468507U
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CN
China
Prior art keywords
valve
valve rod
handle
oil
cross
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Expired - Fee Related
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CN2012200335637U
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Chinese (zh)
Inventor
吴椒
吴戈
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HANGZHOU XIAOSHAN FORKLIFT PARTS CO Ltd
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HANGZHOU XIAOSHAN FORKLIFT PARTS CO Ltd
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Priority to CN2012200335637U priority Critical patent/CN202468507U/en
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Publication of CN202468507U publication Critical patent/CN202468507U/en
Anticipated expiration legal-status Critical
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Abstract

The utility model relates to a speed change operating valve, in particular to a novel speed change operating valve of a loading machine. By using the novel speed change operating valve, the technical problems in the prior art that the speed change operating valve does not have a decompression buffer function, the function of a speed changing box of a novel loading machine cannot be met, and the like, are mainly solved. The novel speed change operating valve comprises a valve body (1). The novel speed change operating valve is characterized in that a bottom plate (2) is arranged at the lower part of the valve body (1); an oil inlet, a main oil pressure measuring opening, a reverse gear pressure measuring opening, an oil spray opening and a lubrication oil inlet are arranged on the valve body; a decompression buffer device, a braking device and a gear shifting device are arranged in the valve body; and the devices are communicated by a main oil way, a working oil way, a balance oil way and a decompression oil way which are arranged on the bottom surface of the valve body.

Description

The novel speed change control valve of a kind of loader
Technical field
The utility model relates to a kind of speed change control valve, especially relates to the novel speed change control valve of a kind of loader.
Background technique
Present domestic ZL20/30 loader mostly adopts the shifted control valve of fixed shaft type hand-machine liquid with the BS428 gearbox.Chinese patent discloses a kind of gearbox of blocking the junction plane oil impregnate with speed change control valve (notice of authorization number: CN201909028U); It comprises valve body; Valve body is provided with braking device, speed-change and gearshift device, and the working connection through the valve body bottom between braking device and the speed-change and gearshift device is communicated with, and the bottom plane of valve body is provided with working oil path; The sealing paper washer is installed on the valve body bottom plane and is connected base plate; Connect base plate and be provided with actuator port, the periphery of actuator port is provided with the antiseepage low pressure oil-return groove of blocking-up oil impregnate, and antiseepage low pressure oil-return groove is communicated with the oil back chamber of valve body.But this speed change control valve does not possess the pressure-reducing cushioning function, can not satisfy the needs of novel loading machine gearbox function.
The model utility content
The utility model provides the novel speed change control valve of a kind of loader, and it mainly is to solve existing in prior technology speed change control valve not possess the pressure-reducing cushioning function, can not satisfy the technical problem of the needs etc. of novel loading machine gearbox function.
The above-mentioned technical problem of the utility model mainly is able to solve through following technical proposals:
The novel speed change control valve of a kind of loader of the utility model; Comprise valve body; Described valve body lower portion is provided with base plate; Valve body is provided with filler opening, main oil pressure pressure taps, reverse gear pressure taps, drenches hydraulic fluid port, lubricates filler opening, is provided with pressure-reducing cushioning device, braking device, gearshift in the valve body, is communicated with by the working connection that is located at the valve body bottom surface, working oil path, balance oil circuit, decompression oil circuit between each device.Pressure oil is communicated to the valve body bottom surface through the main oil-hole that is located at the braking valve pocket and does the multiple series series design, and working connection is connected with decompression oil circuit, balance oil circuit, and working connection requires to be assigned to three working oil path according to gear switch after getting into gearshift.
As preferably; Described valve body bottom surface is provided with gear oil circuit, lubricating oil path, pouring oil oil circuit, decompression return opening; Base plate is provided with the I shelves hydraulic fluid port that advances, the II shelves hydraulic fluid port that advances, reverse gear hydraulic fluid port, lubricated hydraulic fluid port, drench hydraulic fluid port, decompression return opening, oil back chamber; At gear hydraulic fluid port and lubricated hydraulic fluid port peripheral hardware blocking-up antiseepage oil groove is arranged, each oil circuit is communicated with corresponding hydraulic fluid port.
As preferably; Described pressure-reducing cushioning device comprises the decompression valve rod that is located in the valve body, and the decompression valve rod is provided with pressurized hole, decompression valve rod left side dress decompression plug screw; Relief spring is equipped with on decompression valve rod right side; The outer suit balance spring of relief spring, the balance spring outer end is connected with the equilibrium valve slide block, and the equilibrium valve slide block is provided with balancing bolt outward.Pressure oil makes between decompression valve rod and the plug screw through the pressurized hole of decompression valve rod left end and forms high pressure during work; Promoting the decompression valve rod moves to right; Open the decompression return opening, the value of setting by relief spring is controlled at 1.1-1.5MPa with working pressure, and working pressure can be adjusted by host requirements.Pressurized hole is 3 axial design, reduces the frequency that pressurized hole stops up main oil pressure moment rising, causes significant trouble.
As preferably, be provided with one-way valve in the balance oil circuit of described pressure-reducing cushioning device, one-way valve is provided with one-way valve baffle plate, flow nipple, throttle orifice, dredges needle-valve.When after the control valve gear shift, boosting, closed check valve makes equilibrium valve and big plug screw system form high pressure through throttle orifice, promotes to move in the equilibrium valve with reduction valve to keep balance, keeps the working pressure of setting.When the shift valve gear shift, separate the release rapidly of gear oil circuit rapidly in order to make the gearbox clutch; Balance oil duct pressure moment decline thereupon, one-way valve is opened rapidly, and the high pressure between equilibrium valve and the big plug screw disappears; Make the relief spring disequilibrium; Strengthen the decompression valve rod and move to right, enlarge the decompression return opening, operating oil pressure is quickly fallen to below the 0.5MPa from the 1.1-1.5MPa that sets.After the shift valve gear shift, the gear oil return is cut off, and operating oil pressure is set up thereupon, and the step-down of gear switch process, pressure rising time, 0.8-1.6S reached tangible hydraulic cushion effect, improved the gearbox gear-shift quality.Dredge needle-valve flow nipple structure because pressure oil mobile driven and dredged needle-valve and in throttle orifice, go here and there movingly, avoided the carbonizing matter in the hydraulic oil, iron end obstruction throttle orifice.
As preferably, described braking device comprises the braking guiding valve that is located in the valve body, braking guiding valve left side dress brake spring; Install spring seat in the spring; Spring seat has adjustment pad and braking plug screw sealing and fixing outward, and braking guiding valve right side dress leather cup is put the gas screw on the valve body of leather cup top; Leather cup outside dress brake interface plug screw is at brake interface plug screw peripheral hardware braking source interface.When the loader operation needs emergency brake, connect liquid (gas) braking source, brake valve inwardly moves axially the cut-out working connection; Gearbox quits work, and removes behind the braking source brake spring and promotes the braking guiding valve and reset, and working connection is communicated with; Gearbox is resumed work, thereby has guaranteed the safety work of loader.
As preferably; Described gearshift comprises the manipulation valve rod that is located in the valve body; Handle in the valve rod and be provided with axial oil circuit, the first cross oilhole, the second cross oilhole and two groups of cross oil circuits, axially oil circuit, the first cross oilhole, the second cross oilhole, two groups of cross oil circuits all are communicated with working oil path and gear oil circuit; Handle valve rod and be provided with arc groove; Locking ball, retaining spring, positioning screwn are housed on the groove successively; Handle valve rod and be provided with drain pan; Handle valve rod left end pull handle and be provided with the pin-and-hole that is connected with loader, manipulation valve rod pull handle and manipulation valve rod right-hand member caudal peduncle place all install spacing shim, outside framework oil seal, jump ring successively.
As preferably; Described gearshift comprises the manipulation valve rod that is located in the valve body; Handle in the valve rod and be provided with axial oil circuit, the first cross oilhole, the second cross oilhole and two groups of cross oil circuits, axially oil circuit, the first cross oilhole, the second cross oilhole, two groups of cross oil circuits all are communicated with working oil path and gear oil circuit; Handle valve rod and be provided with arc groove, locking ball, retaining spring, positioning screwn are housed on the groove successively, handle valve rod and be provided with drain pan; Handle valve rod left end pull handle and be provided with the pin-and-hole that is connected with loader; Handle valve rod for no caudal peduncle design, handle on the valve rod pull handle and install spacing shim, outside framework oil seal, jump ring successively, handle valve rod pull handle exposed parts and be provided with external clamping type ripple guard shield; The one of which head is stuck on the stem head; The other end is stuck on the valve body, and the valve opening of handling the valve rod right-hand member is provided with stifle, and stifle has the stifle jump ring to fix outward.
As preferably; Described gearshift comprises the manipulation valve rod that is located in the valve body; Handle in the valve rod and be provided with axial oil circuit, the first cross oilhole, the second cross oilhole and two groups of cross oil circuits, axially oil circuit, the first cross oilhole, the second cross oilhole, two groups of cross oil circuits all are communicated with working oil path and gear oil circuit; Handle valve rod and be provided with arc groove; Locking ball, retaining spring, positioning screwn are housed on the groove successively; Handle valve rod and be provided with drain pan; Handle valve rod right-hand member pull handle and be provided with the pin-and-hole that is connected with loader, manipulation valve rod pull handle and manipulation valve rod left end caudal peduncle place install spacing shim, outside framework oil seal, jump ring successively.
As preferably; Described gearshift comprises the manipulation valve rod that is located in the valve body; Handle in the valve rod and be provided with axial oil circuit, the first cross oilhole, the second cross oilhole and two groups of cross oil circuits, axially oil circuit, the first cross oilhole, the second cross oilhole, two groups of cross oil circuits all are communicated with working oil path and gear oil circuit; Handle valve rod and be provided with arc groove, locking ball, retaining spring, positioning screwn are housed on the groove successively, handle valve rod and be provided with drain pan; Handle valve rod right-hand member pull handle and be provided with the pin-and-hole that is connected with loader, handle on the valve rod pull handle and install spacing shim, outside framework oil seal, jump ring successively, handle valve rod pull handle exposed parts and be provided with embedded ripple guard shield; The one of which head is stuck on the stem head; The other end is stuck on the valve body, and the valve opening of handling the valve rod right-hand member is provided with stifle, and stifle has the stifle jump ring to fix outward.
Therefore; The utility model possesses four oil circuit series design of working connection, working oil path, decompression oil circuit, buffering oil circuit; The gear switch good buffer effect is handled valve rod and is possessed two kinds of directions of left and right sides subtend, and it is wide to connect applicability; In conjunction with lubricating function, pouring functional oil, blocking-up and gearbox junction plane oil impregnate function, have characteristics such as reasonable in design, simple in structure, that versatility is good.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the utility model;
Accompanying drawing 2 is the structural representations of looking up of Fig. 1;
Accompanying drawing 3 is C-C cross-sectional view of Fig. 2;
Accompanying drawing 4 is oil circuit schematic representation of the valve body bottom surface of the utility model;
Accompanying drawing 5 is structural representations of the base plate of the utility model;
Accompanying drawing 6 is B-B cross-sectional view of Fig. 1;
Accompanying drawing 7 is G-G cross-sectional view of Fig. 4;
Accompanying drawing 8 is A-A cross-sectional view of Fig. 1 of embodiment 1;
Accompanying drawing 9 is A-A cross-sectional view of Fig. 1 of embodiment 2;
Accompanying drawing 10 is A-A cross-sectional view of Fig. 1 of embodiment 3;
Accompanying drawing 11 is A-A cross-sectional view of Fig. 1 of embodiment 4.
Component among the figure; Position and numbering: valve body 1; Base plate 2; Decompression valve rod 3; Pressurized hole 4; Decompression plug screw 5; Relief spring 6; Balance spring 7; Equilibrium valve slide block 8; Balancing bolt 9; One-way valve 10; One-way valve baffle plate 11; Flow nipple 12; Throttle orifice 13; Dredge needle-valve 14; Braking guiding valve 15; Brake spring 16; Spring seat 17; Adjustment pad 18; Braking plug screw 19; Leather cup 20; Bleed screw 21; Brake interface plug screw 22; Braking source interface 23; Handle valve rod 24; Arc groove 25; Locking ball 26; Retaining spring 27; Positioning screwn 28; Pin-and-hole 29; Spacing shim 30; Outside framework oil seal 31; Jump ring 32; External clamping type ripple guard shield 33; Stifle 34; Stifle jump ring 35; Embedded ripple guard shield 36; Filler opening 37; Main oil pressure pressure taps 38; Reverse gear pressure taps 39; Drench hydraulic fluid port 40; Lubricated filler opening 41; Axial oil circuit 42; The first cross oilhole 43; The second cross oilhole 44; Drain pan 45; Working connection 46; Working oil path 47; Balance oil circuit 48; Decompression oil circuit 49; Gear oil circuit 50; Lubricating oil path 51; Drench oil circuit 52; Decompression return opening 53; I shelves hydraulic fluid port 54 advances; II shelves hydraulic fluid port 55 advances; Reverse gear hydraulic fluid port 56; Lubricated hydraulic fluid port 57; Blocking-up antiseepage oil groove 58; Oil back chamber 59.
Embodiment
Pass through embodiment below, and combine accompanying drawing, do further bright specifically the technological scheme of the utility model.
Embodiment 1: the novel speed change control valve of a kind of loader of this example; Like Fig. 1, Fig. 2, Fig. 4; Comprise valve body 1, valve body lower portion is provided with base plate 2, and valve body is provided with filler opening 37, main oil pressure pressure taps 38, reverse gear pressure taps 39, drenches hydraulic fluid port 40, lubricates filler opening 41; Be provided with pressure-reducing cushioning device, braking device, gearshift in the valve body, be communicated with by the working connection that is located at the valve body bottom surface 46, working oil path 47, balance oil circuit 48, decompression oil circuit 49 between each device.The valve body bottom surface is provided with gear oil circuit 50, lubricating oil path 51, pouring oil circuit 52, decompression return opening 53; Like Fig. 5; Base plate 2 is provided with the I shelves hydraulic fluid port 54 that advances, the II shelves hydraulic fluid port 55 that advances, reverse gear hydraulic fluid port 56, lubricated hydraulic fluid port 57, drench hydraulic fluid port 40, decompression return opening 53, oil back chamber 59; At gear hydraulic fluid port and lubricated hydraulic fluid port peripheral hardware blocking-up antiseepage oil groove 58 is arranged, each oil circuit is communicated with corresponding hydraulic fluid port.Like Fig. 3; The pressure-reducing cushioning device comprises the decompression valve rod 3 that is located in the valve body 1, and the decompression valve rod is provided with pressurized hole 4, decompression valve rod left side dress decompression plug screw 5; Relief spring 6 is equipped with on decompression valve rod right side; The outer suit balance spring 7 of relief spring, the balance spring outer end is connected with equilibrium valve slide block 8, and the equilibrium valve slide block is provided with balancing bolt 9 outward.Like Fig. 7, be provided with one-way valve 10 in the balance oil circuit of pressure-reducing cushioning device, one-way valve is provided with one-way valve baffle plate 11, flow nipple 12, throttle orifice 13, dredges needle-valve 14.Like Fig. 6, braking device comprises the braking guiding valve 15 that is located in the valve body, braking guiding valve left side dress brake spring 16; Install spring seat 17 in the spring; Spring seat has adjustment pad 18 and braking plug screw 19 sealing and fixing outward, and braking guiding valve right side dress leather cup 20 is put gas screw 21 on the valve body of leather cup top; Leather cup outside dress brake interface plug screw 22 is at brake interface plug screw peripheral hardware braking source interface 23.
Like Fig. 8; Gearshift comprises the manipulation valve rod 24 that is located in the valve body; Handle and to be provided with axial oil circuit 42, the first cross oilhole 43, the second cross oilhole 44 and two groups of cross oil circuits in the valve rod, axially oil circuit 42, the first cross oilhole 43, the second cross oilhole 44 and two groups of cross oil circuits all are communicated with working oil path 47 and gear oil circuit 50; Handle valve rod and be provided with arc groove 25; Locking ball 26, retaining spring 27, positioning screwn 28 are housed on the groove successively; Handle valve rod and be provided with drain pan 45; Handle valve rod left end pull handle and be provided with the pin-and-hole 29 that is connected with loader, manipulation valve rod pull handle and manipulation valve rod right-hand member caudal peduncle place all install spacing shim 30, outside framework oil seal 31, jump ring 32 successively.
Embodiment 2: the novel speed change control valve of a kind of loader of this example; Like Fig. 9; Gearshift comprises the manipulation valve rod 24 that is located in the valve body 1; Handle and to be provided with axial oil circuit 42, the first cross oilhole 43, the second cross oilhole 44 and two groups of cross oil circuits in the valve rod, axially oil circuit 42, the first cross oilhole 43, the second cross oilhole 44 and two groups of cross oil circuits all are communicated with working oil path 47 and gear oil circuit 50; Handle valve rod and be provided with arc groove 25, locking ball 26, retaining spring 27, positioning screwn 28 are housed on the groove successively, handle valve rod and be provided with drain pan; Handle valve rod left end pull handle and be provided with the pin-and-hole 29 that is connected with loader; Handle valve rod for no caudal peduncle design, handle on the valve rod pull handle and install spacing shim 30, outside framework oil seal 31, jump ring 32 successively, handle valve rod pull handle exposed parts and be provided with external clamping type ripple guard shield 33; The one of which head is stuck on the stem head; The other end is stuck on the valve body, and the valve opening of handling the valve rod right-hand member is provided with stifle 34, and stifle has stifle jump ring 35 fixing outward.
All the other are with embodiment 1.
Embodiment 3: the novel speed change control valve of a kind of loader of this example; Like Figure 10; Gearshift comprises the manipulation valve rod 24 that is located in the valve body 1; Handle and to be provided with axial oil circuit 42, the first cross oilhole 43, the second cross oilhole 44 and two groups of cross oil circuits in the valve rod, axially oil circuit 42, the first cross oilhole 43, the second cross oilhole 44 and two groups of cross oil circuits all are communicated with working oil path 47 and gear oil circuit 50; Handle valve rod and be provided with arc groove 25; Locking ball 26, retaining spring 27, positioning screwn 28 are housed on the groove successively; Handle valve rod and be provided with drain pan; Handle valve rod right-hand member pull handle and be provided with the pin-and-hole 29 that is connected with loader, manipulation valve rod pull handle and manipulation valve rod left end caudal peduncle place install spacing shim 30, outside framework oil seal 31, jump ring 32 successively.
All the other are with embodiment 1.
Embodiment 4: the novel speed change control valve of a kind of loader of this example; Like Figure 11; Gearshift comprises the manipulation valve rod 24 that is located in the valve body 1; Handle and to be provided with axial oil circuit 42, the first cross oilhole 43, the second cross oilhole 44 and two groups of cross oil circuits in the valve rod, axially oil circuit 42, the first cross oilhole 43, the second cross oilhole 44 and two groups of cross oil circuits all are communicated with working oil path 47 and gear oil circuit 50; Handle valve rod and be provided with arc groove 25; Locking ball 26, retaining spring 27, positioning screwn 28 are housed on the groove successively, handle valve rod and be provided with drain pan, handle valve rod right-hand member pull handle and be provided with the pin-and-hole 29 that is connected with loader; Handle on the valve rod pull handle and install spacing shim 30, outside framework oil seal 31, jump ring 32 successively; Handle valve rod pull handle exposed parts and be provided with embedded ripple guard shield 36, the one of which head is stuck on the stem head, and the other end is stuck on the valve body; The valve opening of handling the valve rod right-hand member is provided with stifle 34, and stifle has stifle jump ring 35 fixing outward.
All the other are with embodiment 1.
The above is merely the specific embodiment of the utility model; But the structure characteristic of the utility model is not limited thereto; Any those skilled in the art is in the field of the utility model, and variation of being done or modification all are encompassed among the claim of the utility model.

Claims (9)

1. novel speed change control valve of loader; Comprise valve body (1); It is characterized in that described valve body (1) bottom is provided with base plate (2); Valve body is provided with filler opening, main oil pressure pressure taps, reverse gear pressure taps, drenches hydraulic fluid port, lubricates filler opening, is provided with pressure-reducing cushioning device, braking device, gearshift in the valve body, is communicated with by the working connection that is located at the valve body bottom surface, working oil path, balance oil circuit, decompression oil circuit between each device.
2. the novel speed change control valve of a kind of loader according to claim 1; It is characterized in that described valve body (1) bottom surface is provided with gear oil circuit, lubricating oil path, pouring oil oil circuit, decompression return opening; Base plate (2) is provided with the I shelves hydraulic fluid port that advances, the II shelves hydraulic fluid port that advances, reverse gear hydraulic fluid port, lubricated hydraulic fluid port, drench hydraulic fluid port, decompression return opening, oil back chamber; At gear hydraulic fluid port and lubricated hydraulic fluid port peripheral hardware blocking-up antiseepage oil groove is arranged, each oil circuit is communicated with corresponding hydraulic fluid port.
3. the novel speed change control valve of a kind of loader according to claim 1 and 2; It is characterized in that described pressure-reducing cushioning device comprises the decompression valve rod (3) that is located in the valve body (1), the decompression valve rod is provided with pressurized hole (4), decompression valve rod left side dress decompression plug screw (5); Relief spring (6) is equipped with on decompression valve rod right side; The outer suit balance spring (7) of relief spring, the balance spring outer end is connected with equilibrium valve slide block (8), and the equilibrium valve slide block is provided with balancing bolt (9) outward.
4. the novel speed change control valve of a kind of loader according to claim 1 and 2; It is characterized in that being provided with one-way valve (10) in the balance oil circuit of described pressure-reducing cushioning device, one-way valve is provided with one-way valve baffle plate (11), flow nipple (12), throttle orifice (13), dredges needle-valve (14).
5. the novel speed change control valve of a kind of loader according to claim 1 and 2; It is characterized in that described braking device comprises the braking guiding valve (15) that is located in the valve body (1); Braking guiding valve left side dress brake spring (16) installs spring seat (17) in the spring, spring seat has adjustment pad (18) and braking plug screw (19) sealing and fixing outward; Braking guiding valve right side dress leather cup (20); Put gas screw (21) on the valve body of leather cup top, leather cup outside dress brake interface plug screw (22) is at brake interface plug screw peripheral hardware braking source interface (23).
6. the novel speed change control valve of a kind of loader according to claim 1 and 2; It is characterized in that described gearshift comprises the manipulation valve rod (24) that is located in the valve body (1); Handle in the valve rod and be provided with axial oil circuit, the first cross oilhole, the second cross oilhole and two groups of cross oil circuits, axially oil circuit, the first cross oilhole, the second cross oilhole, two groups of cross oil circuits all are communicated with working oil path and gear oil circuit; Handle valve rod and be provided with arc groove (25); Locking ball (26), retaining spring (27), positioning screwn (28) are housed on the groove successively; Handle valve rod and be provided with drain pan; Handle valve rod left end pull handle and be provided with the pin-and-hole (29) that is connected with loader, manipulation valve rod pull handle and manipulation valve rod right-hand member caudal peduncle place all install spacing shim (30), outside framework oil seal (31), jump ring (32) successively.
7. the novel speed change control valve of a kind of loader according to claim 1 and 2; It is characterized in that described gearshift comprises the manipulation valve rod (24) that is located in the valve body (1); Handle in the valve rod and be provided with axial oil circuit, the first cross oilhole, the second cross oilhole and two groups of cross oil circuits, axially oil circuit, the first cross oilhole, the second cross oilhole, two groups of cross oil circuits all are communicated with working oil path and gear oil circuit; Handle valve rod and be provided with arc groove (25), locking ball (26), retaining spring (27), positioning screwn (28) are housed on the groove successively, handle valve rod and be provided with drain pan; Handle valve rod left end pull handle and be provided with the pin-and-hole (29) that is connected with loader; Handle valve rod for no caudal peduncle design, handle on the valve rod pull handle and install spacing shim (30), outside framework oil seal (31), jump ring (32) successively, handle valve rod pull handle exposed parts and be provided with external clamping type ripple guard shield (33); The one of which head is stuck on the stem head; The other end is stuck on the valve body, and the valve opening of handling the valve rod right-hand member is provided with stifle (34), and stifle has stifle jump ring (35) fixing outward.
8. the novel speed change control valve of a kind of loader according to claim 1 and 2; It is characterized in that described gearshift comprises the manipulation valve rod (24) that is located in the valve body (1); Handle in the valve rod and be provided with axial oil circuit, the first cross oilhole, the second cross oilhole and two groups of cross oil circuits, axially oil circuit, the first cross oilhole, the second cross oilhole, two groups of cross oil circuits all are communicated with working oil path and gear oil circuit; Handle valve rod and be provided with arc groove (25); Locking ball (26), retaining spring (27), positioning screwn (28) are housed on the groove successively; Handle valve rod and be provided with drain pan; Handle valve rod right-hand member pull handle and be provided with the pin-and-hole (29) that is connected with loader, manipulation valve rod pull handle and manipulation valve rod left end caudal peduncle place install spacing shim (30), outside framework oil seal (31), jump ring (32) successively.
9. the novel speed change control valve of a kind of loader according to claim 1 and 2; It is characterized in that described gearshift comprises the manipulation valve rod (24) that is located in the valve body (1); Handle in the valve rod and be provided with axial oil circuit, the first cross oilhole, the second cross oilhole and two groups of cross oil circuits, axially oil circuit, the first cross oilhole, the second cross oilhole, two groups of cross oil circuits all are communicated with working oil path and gear oil circuit; Handle valve rod and be provided with arc groove (25); Locking ball (26), retaining spring (27), positioning screwn (28) are housed on the groove successively, handle valve rod and be provided with drain pan, handle valve rod right-hand member pull handle and be provided with the pin-and-hole (29) that is connected with loader; Handle on the valve rod pull handle and install spacing shim (30), outside framework oil seal (31), jump ring (32) successively; Handle valve rod pull handle exposed parts and be provided with embedded ripple guard shield (36), the one of which head is stuck on the stem head, and the other end is stuck on the valve body; The valve opening of handling the valve rod right-hand member is provided with stifle (34), and stifle has stifle jump ring (35) fixing outward.
CN2012200335637U 2012-02-03 2012-02-03 Novel speed change operating valve of loading machine Expired - Fee Related CN202468507U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012200335637U CN202468507U (en) 2012-02-03 2012-02-03 Novel speed change operating valve of loading machine

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Application Number Priority Date Filing Date Title
CN2012200335637U CN202468507U (en) 2012-02-03 2012-02-03 Novel speed change operating valve of loading machine

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103062148A (en) * 2013-01-30 2013-04-24 浙江海克力液压有限公司 Energy-saving type prior unloading valve
CN105889574A (en) * 2016-06-13 2016-08-24 杭州前进齿轮箱集团股份有限公司 Operating valve for double-pull rod type gearbox with cutting function
CN106122143A (en) * 2016-06-29 2016-11-16 杭州萧山叉车配件有限公司 Loader power shift level 2 buffering handles valve

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103062148A (en) * 2013-01-30 2013-04-24 浙江海克力液压有限公司 Energy-saving type prior unloading valve
CN103062148B (en) * 2013-01-30 2015-09-16 浙江海克力液压有限公司 A kind of energy-saving priority unloading valve
CN105889574A (en) * 2016-06-13 2016-08-24 杭州前进齿轮箱集团股份有限公司 Operating valve for double-pull rod type gearbox with cutting function
CN105889574B (en) * 2016-06-13 2018-04-03 杭州前进齿轮箱集团股份有限公司 A kind of gearbox of dual-pulling rod type with cutting function manipulation valve
CN106122143A (en) * 2016-06-29 2016-11-16 杭州萧山叉车配件有限公司 Loader power shift level 2 buffering handles valve
CN106122143B (en) * 2016-06-29 2018-03-09 杭州萧山叉车配件有限公司 Loading machine power shift level 2 buffering manipulates valve

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