CN112392094A - Anti-shake excavator pilot valve - Google Patents
Anti-shake excavator pilot valve Download PDFInfo
- Publication number
- CN112392094A CN112392094A CN202011389676.6A CN202011389676A CN112392094A CN 112392094 A CN112392094 A CN 112392094A CN 202011389676 A CN202011389676 A CN 202011389676A CN 112392094 A CN112392094 A CN 112392094A
- Authority
- CN
- China
- Prior art keywords
- plunger
- spring
- control valve
- shake
- excavator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000428 dust Substances 0.000 claims description 3
- 230000033001 locomotion Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
- F16F15/067—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The invention discloses an anti-shake excavator pilot valve which comprises a handle, wherein the handle is connected with one end of a universal joint through a connecting assembly, the other end of the universal joint is connected with one end of a valve body, an oil inlet cavity, an oil return cavity and an oil duct in the valve body are communicated through a control valve core hole, a control valve core, a reset spring, a pressure spring, a spring seat, a plunger seat and a plunger are arranged in the control valve core hole, one end of the reset spring is connected with a step on the inner wall of the control valve core hole, and the other end of the reset spring is connected with one end of the; one end of the pressure spring is connected with the control valve core, and the other end of the pressure spring is connected with one end of the spring seat; the other end of spring holder is connected the one end of plunger, and the plunger is located in the plunger seat. The pilot valve for the hydraulic excavator for preventing the resonance vibration, which is provided by the invention, has the advantages of simple structure, convenience in processing and low cost, and can effectively avoid the resonance between the excavator and the pilot valve, thereby greatly improving the maneuverability and the comfort of the excavator.
Description
Technical Field
The invention relates to an excavator pilot valve, in particular to an anti-shake excavator pilot valve, and belongs to the technical field of hydraulic devices.
Background
A left and right pilot valve for a hydraulic excavator (hereinafter, referred to as an excavator) controls the motions of a boom, an arm, a bucket, a swing, etc. of the excavator by controlling the movement of a valve rod in a main valve of the excavator, so that the excavator performs corresponding excavation work. The existing left and right pilot valves for the excavator are easy to generate resonance under working conditions that a handle of the pilot valve is suddenly loosened when a movable arm or a bucket rod acts during the operation of the excavator, the whole excavator is shaken on an upslope or on an uneven road surface, the handle is loosened during the rotation action, and the like, so that the whole excavator is strongly shaken, and the comfort and the efficiency of the excavator are influenced.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the handle of the pilot valve of the excavator is prevented from resonating with the whole excavator.
In order to solve the technical problem, the technical scheme of the invention provides an anti-shake excavator pilot valve which is characterized by comprising a handle, wherein the handle is connected with one end of a universal joint through a connecting assembly, the other end of the universal joint is connected with one end of a valve body, the other end of the valve body is connected with an interface board, an oil inlet cavity, an oil return cavity and an oil duct are arranged in the valve body, the oil inlet cavity, the oil return cavity and the oil duct in the valve body are communicated through a control valve core hole, a control valve core, a reset spring, a pressure spring, a spring seat, a plunger seat and a plunger are arranged in the control valve core hole, one end of the reset spring is connected with a step on the inner wall of the control valve; the reset spring is sleeved on the outer side of the control valve core; the pressure spring is sleeved on the control valve core, one end of the pressure spring is connected with the control valve core, and the other end of the pressure spring is connected with one end of the spring seat; the spring seat is provided with a hole for the end part of the control valve core to pass through; the other end of spring holder is connected the one end of plunger, and the plunger is located in the plunger seat.
Preferably, a dust cover is arranged on the outer side of the structure between the handle and the valve body.
Preferably, the oil return cavity of the valve body is separated from another communication channel which is communicated with the oil inlet cavity except the control valve core hole through a bushing.
Preferably, the spring seat is provided with a hole groove with an inner diameter larger than the outer diameter of the return spring and the outer diameter of the pressure spring on the surface of one end connected with the return spring and the pressure spring.
Preferably, a first groove matched with the end part of the plunger is arranged on the surface of one end, connected with the plunger, of the spring seat.
Preferably, the plunger is in a T-shaped structure; the big end of the plunger is connected with the spring seat.
Preferably, one end of the plunger, which is connected with the spring seat, is provided with a second groove into which the end of the control valve element can be inserted.
Preferably, the fit clearance between the spring seat and the valve body is 0.28-0.35 mm; the fit clearance between the spring seat and the plunger is 0.05 mm-0.132 mm; the clearance between the return spring and the valve body is 0.5 mm-1 mm.
The shaking condition in the prior art is related to the gravity center and the internal structure of the left and right pilot valve handles for the excavator. According to the pilot valve for the hydraulic excavator, which is used for preventing resonance shaking, the structure of the plunger is changed, and the size of the gap among the plunger, the reset spring and the spring seat is changed, so that the excavator and the pilot valve can be effectively prevented from generating resonance, and the maneuverability and the comfort of the excavator are greatly improved. The invention also has the characteristics of simple structure, convenient processing and low cost.
Drawings
FIG. 1 is a schematic diagram of an anti-shake excavator pilot valve;
FIG. 2 is a partial cross-sectional view of an anti-shake excavator pilot valve workport;
FIG. 3 is a schematic view of the plunger;
FIG. 4 is a schematic view of a return spring;
FIG. 5 is a schematic view of a spring seat;
fig. 6 is a top view of fig. 5.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
The invention provides an anti-shake excavator pilot valve which can prevent a complete machine and the pilot valve from vibrating due to resonance and is suitable for a 6t-9t hydraulic excavator. As shown in fig. 1 and 2, the dust-proof device comprises a handle 1, wherein the handle 1 is connected with one end of a universal joint 7 through a connecting assembly, the other end of the universal joint 7 is connected with the top end of a valve body 10, the valve body 10 is rotatably connected with the handle 1, and the handle 1 is protected by an external dust cover 2. An oil inlet cavity, an oil return cavity and a plurality of oil ducts are arranged in the valve body 10, the oil inlet cavity, the oil return cavity and the plurality of oil ducts in the valve body 10 are communicated through a control valve core hole, a control valve core 20, a return spring 19, a pressure spring 18, a spring seat 17, a plunger seat 16 and a plunger 15 are arranged in the control valve core hole, as shown in fig. 4, one end of the return spring 19 is connected with a step on the inner wall of the control valve core hole, and the other end of the return spring 19 is connected with one end of the spring seat 17; the return spring 19 is sleeved outside the control valve core 20; the pressure spring 18 is sleeved on the control valve core 20, one end of the pressure spring 18 is connected with the control valve core 20, and the other end of the pressure spring 18 is connected with one end of the spring seat 17; the spring seat 17 is provided with a hole for the end of the control valve core 20 to pass through; the other end of the spring seat 17 is connected with one end of the plunger 15, and the plunger 15 is arranged in the plunger seat 16. The oil return cavity of the valve body 10 is separated from another communicating channel of the oil inlet cavity except the control valve core hole by a bushing 11, the valve body 10 is connected with an interface board 14, and an O-shaped ring 13 is arranged between the valve body 10 and the interface board 14. The valve body 10 and the interface board 14 are respectively provided with corresponding grooves, and the grooves of the valve body 10 and the interface board 14 are respectively provided with pins 12 for positioning.
As shown in fig. 5 and 6, a hole groove having an inner diameter larger than the outer diameter of the return spring 19 and the outer diameter of the pressure spring 18 is formed on one end surface of the spring seat 17 connected to the return spring 19 and the pressure spring 18. The surface of one end of the spring seat 17 connected with the plunger 15 is provided with a first groove matched with the end part of the plunger 15.
As shown in fig. 3, the plunger 15 is shaped in a T-shaped configuration; the large end of the plunger 15 is connected to a spring seat 17. One end of the plunger 15 connected to the spring seat 17 is provided with a second groove into which an end of the control spool 20 is inserted.
The handle 1 is provided with a lead connected with a horn, the lead is connected out from one side of the valve body 10, and the handle 1 is provided with a binding belt 3 used for fixing the lead to prevent the lead from being pulled apart.
The connecting assembly comprises an intermediate joint 5, a nut 4, an intermediate joint 5 and a pressure plate 6, the handle 1 is fixedly connected with one end of the intermediate joint 5 through the nut 4, and the other end of the intermediate joint 5 is connected with one end of a universal joint 7 through the pressure plate 6. Be equipped with clamp plate 9 on the valve body 10, be fixed with pencil spacer sleeve 8 on the clamp plate 9, the wire of connecting loudspeaker passes in pencil spacer sleeve 8 back penetrates valve body 10, then, wears out from valve body 10.
In this embodiment, the plunger 15 is designed in a T-shape; the fit clearance between the spring seat 17 and the valve body 10 is 0.28 mm-0.35 mm, the fit clearance between the spring seat 17 and the T-shaped position of the plunger 15 is 0.05 mm-0.132 mm, and the clearance between the return spring 19 and the valve body 10 is 0.5 mm-1 mm.
Claims (8)
1. The anti-shake excavator pilot valve is characterized by comprising a handle (1), wherein the handle (1) is connected with one end of a universal joint (7) through a connecting assembly, the other end of the universal joint (7) is connected with one end of a valve body (10), the other end of the valve body (10) is connected with an interface board (14), an oil inlet cavity, an oil return cavity and an oil duct are arranged in the valve body (10), the oil inlet cavity, the oil return cavity and the oil duct in the valve body (10) are communicated through a control valve core hole, a control valve core (20), a reset spring (19), a pressure spring (18), a spring seat (17), a plunger seat (16) and a plunger (15) are arranged in the control valve core hole, one end of the reset spring (19) is connected with a step on the inner wall of the control valve core hole, and the other end of; the return spring (19) is sleeved on the outer side of the control valve core (20); the pressure spring (18) is sleeved on the control valve core (20), one end of the pressure spring (18) is connected with the control valve core (20), and the other end of the pressure spring (18) is connected with one end of the spring seat (17); the spring seat (17) is provided with a hole for the end part of the control valve core (20) to pass through; the other end of the spring seat (17) is connected with one end of the plunger (15), and the plunger (15) is arranged in the plunger seat (16).
2. An anti-shake excavator pilot valve as claimed in claim 1, characterised in that a dust cover (2) is provided outside the structure between the handle (1) and the valve body (10).
3. An anti-shake excavator pilot valve as claimed in claim 1, wherein the other communication passage communicating the oil return chamber of the valve body (10) with the oil inlet chamber except the control spool hole is partitioned by a bushing (11).
4. An anti-shake excavator pilot valve as claimed in claim 1, wherein the spring seat (17) is provided with a hole groove on one end surface connected with the return spring (19) and the pressure spring (18), and the inner diameter of the hole groove is larger than the outer diameter of the return spring (19) and the outer diameter of the pressure spring (18).
5. An anti-shake excavator pilot valve as claimed in claim 1, wherein the end surface of the spring seat (17) connected to the plunger (15) is provided with a first groove matching with the end of the plunger (15).
6. An anti-shake excavator pilot valve as claimed in claim 1 or 5, wherein the plunger (15) is in the shape of a T-shaped structure; the big head end of the plunger (15) is connected with the spring seat (17).
7. An anti-shake excavator pilot valve as claimed in claim 1 or 5, wherein the plunger (15) has a second groove into which the end of the control spool (20) is inserted at one end connected to the spring seat (17).
8. An anti-shake excavator pilot valve as claimed in claim 1, wherein the fit clearance between the spring seat (17) and the valve body (10) is 0.28 mm-0.35 mm; the fit clearance between the spring seat (17) and the plunger (15) is 0.05 mm-0.132 mm; the clearance between the return spring (19) and the valve body (10) is 0.5 mm-1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011389676.6A CN112392094B (en) | 2020-12-02 | 2020-12-02 | Anti-shake excavator pilot valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011389676.6A CN112392094B (en) | 2020-12-02 | 2020-12-02 | Anti-shake excavator pilot valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112392094A true CN112392094A (en) | 2021-02-23 |
| CN112392094B CN112392094B (en) | 2024-05-03 |
Family
ID=74604124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011389676.6A Active CN112392094B (en) | 2020-12-02 | 2020-12-02 | Anti-shake excavator pilot valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112392094B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201575227U (en) * | 2009-12-15 | 2010-09-08 | 青岛凯锐斯通液压机械有限公司 | Hand-operated pilot valve |
| US20110284785A1 (en) * | 2009-02-05 | 2011-11-24 | Mitsuhiro Yoshimoto | Pilot valve assembley |
| CN202251182U (en) * | 2011-09-21 | 2012-05-30 | 贵阳合诚机械制造有限公司 | Hand-operated pilot valve |
| CN103321979A (en) * | 2013-06-17 | 2013-09-25 | 龙工（上海）精工液压有限公司 | Handle pilot valve capable of improving excavator inching operation |
| CN110185432A (en) * | 2019-07-08 | 2019-08-30 | 玉柴桩工(常州)有限公司 | Rotary drilling rig creeps into self-locking device, drilling control system and control method automatically |
| CN211976061U (en) * | 2020-03-23 | 2020-11-20 | 龙工（上海）精工液压有限公司 | Pilot valve wire-passing supporting tube of excavator |
| CN214574276U (en) * | 2020-12-02 | 2021-11-02 | 龙工（上海）精工液压有限公司 | Anti-shake excavator pilot valve |
-
2020
- 2020-12-02 CN CN202011389676.6A patent/CN112392094B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110284785A1 (en) * | 2009-02-05 | 2011-11-24 | Mitsuhiro Yoshimoto | Pilot valve assembley |
| CN201575227U (en) * | 2009-12-15 | 2010-09-08 | 青岛凯锐斯通液压机械有限公司 | Hand-operated pilot valve |
| CN202251182U (en) * | 2011-09-21 | 2012-05-30 | 贵阳合诚机械制造有限公司 | Hand-operated pilot valve |
| CN103321979A (en) * | 2013-06-17 | 2013-09-25 | 龙工（上海）精工液压有限公司 | Handle pilot valve capable of improving excavator inching operation |
| CN110185432A (en) * | 2019-07-08 | 2019-08-30 | 玉柴桩工(常州)有限公司 | Rotary drilling rig creeps into self-locking device, drilling control system and control method automatically |
| CN211976061U (en) * | 2020-03-23 | 2020-11-20 | 龙工（上海）精工液压有限公司 | Pilot valve wire-passing supporting tube of excavator |
| CN214574276U (en) * | 2020-12-02 | 2021-11-02 | 龙工（上海）精工液压有限公司 | Anti-shake excavator pilot valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112392094B (en) | 2024-05-03 |
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