CN202298691U - Lifting limiting device with movable arm - Google Patents
Lifting limiting device with movable arm Download PDFInfo
- Publication number
- CN202298691U CN202298691U CN 201120358298 CN201120358298U CN202298691U CN 202298691 U CN202298691 U CN 202298691U CN 201120358298 CN201120358298 CN 201120358298 CN 201120358298 U CN201120358298 U CN 201120358298U CN 202298691 U CN202298691 U CN 202298691U
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- CN
- China
- Prior art keywords
- movable arm
- hydraulic
- valve
- lifting
- pilot valve
- 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.)
- Expired - Fee Related
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Abstract
A lifting limiting device with a movable arm comprises the movable arm, a movable arm lifting oil cylinder, an induction plate, an approach switch, a relay, a hydraulic pilot valve, a pilot hydraulic pump, a working hydraulic pump, an auxiliary pipeline and a distributing valve. When the lifting limiting device works, the control handle of the hydraulic pilot valve is pulled backwards to a movable arm lifting position and then is loosened, electromagnets in the hydraulic pilot valve attract each other, the valve core of the hydraulic pilot valve is kept in a movable arm lifting position, the valve core of the distributing valve is pushed by hydraulic oil from the pilot hydraulic pump to a movable arm lifting position, and the working hydraulic pump supplies oil to a large cavity of the movable arm lifting oil cylinder, so as to lift the movable arm; and when the movable arm is lifted to a set height, the approach switch inducts the induction plate mounted on the movable arm and sends an electrical signal to the relay to cut off the electricity of the electromagnets in the hydraulic pilot valve instantly, the control handle of the hydraulic pilot valve returns to a middle position under the action of a return spring, the valve core of the distributing valve is pushed to a middle position by the hydraulic oil from the pilot pump, and the working hydraulic pump stops supplying oil to the movable arm lifting oil cylinder. Through the adoption of the lifting limiting device, the service lives of hydraulic elements can be prolonged.
Description
Technical field
The utility model is a kind of moved arm lifting stopping means that handled easily on the loader, reliability are high, cost is low that is used in.
Background technology
At present; The most no moved arm lifting stopping means of domestic loader; When loader long-time relatively and repeat tipping truck into certain altitude; When loading hopper or scraper bowl lift height were limited, the driver will observe and control the lift height of swing arm in each operation cycle, avoid moved arm lifting too high or too low.Belong to the repetition operation, increased driver's labour intensity.Install behind this moved arm lifting device and can with relative position swing arm be set at fixing lift height through the tablet that adjusting is installed on the swing arm near switch; Only need during work that control crank is pulled to lift location and loose one's grip then, swing arm can stop lifting automatically when reaching the height of setting.Can reduce driver's labour intensity.And each lifting is level altitude.
Summary of the invention
In order to overcome loader long-time relatively and repeat tipping truck into certain altitude; When loading hopper or scraper bowl lift height are limited; The driver will observe and control the lift height of swing arm in each operation cycle; Belong to the repetition operation, and be not easy control, increased driver's labour intensity.The utility model provides a kind of moved arm lifting stopping means, and this apparatus structure is simple, and can control swing arm in the lifting process, stops lifting when reaching the height of setting automatically.
The utility model solves the technical scheme that its technical problem adopted: guide's hydraulic pump connects the hydraulic pilot valve; The swing arm of band tablet connects the moved arm lifting oil cylinder; Be connected with distributing valve between working solution press pump and the moved arm lifting oil cylinder; Hydraulic pilot valve and distributing valve interconnect, and the hydraulic pilot valve connects relay, relay connect on the swing arm near switch.
The moved arm lifting stopping means is by swing arm, moved arm lifting oil cylinder, tablet, form near switch, relay, hydraulic pilot valve, guide's hydraulic pump, working solution press pump, associated ping, distributing valve.When work, pull back hydraulic pilot valve control crank, loose one's grip then to the moved arm lifting position; Electromagnetic actuation in the pilot valve, the hydraulic pilot valve core remains on the moved arm lifting position, promotes the distributing valve spool to the moved arm lifting position from the hydraulic oil of guide's hydraulic pump; The working solution press pump makes moved arm lifting to the big chamber of moved arm lifting oil cylinder fuel feeding, when moved arm lifting arrives setting height; Be installed in tablet on the swing arm by near inductive switching, send the signal of telecommunication near switch and give relay this moment, and relay makes the electromagnet instant cut-off in the pilot valve; Hydraulic pilot valve control crank is got back to meta under the effect of back-moving spring; The hydraulic oil of pioneer pump is shifted the spool of distributing valve onto meta, and the working solution press pump stops to moved arm lifting oil cylinder fuel feeding, and this moment, swing arm was parked in the height that configures; The lift height of swing arm is by the relative position decision of tablet and swing arm; The elastic force that pulling force that can armrest when lift height that moved arm lifting height in the course of work need surpass be set once in a while overcomes back-moving spring makes swing arm continue lifting; When needing the moved arm lifting height, also can rely on suction that the thrust of hand overcomes electromagnet that the handle of pilot valve is pushed into meta and makes swing arm stop lifting less than the lift height set.
The beneficial effect of the utility model is; Overcome loader long-time relatively and repeat tipping truck into certain altitude; When loading hopper or scraper bowl lift height are limited; The driver will observe and control the repetition operation of the lift height of swing arm in each operation cycle, thereby alleviates driver's labour intensity.This utility model can also play the effect that reduces hydraulic shock, prolongs the application life of Hydraulic Elements.
Description of drawings
Fig. 1 is the schematic diagram of the utility model.
Among the figure: 1. swing arm, 2. the moved arm lifting oil cylinder, 3. tablet, 4. near switch, 5. relay, 6. hydraulic pilot valve, 7. guide's hydraulic pump, 8. working solution press pump, 9. associated ping, 10. distributing valve.
The specific embodiment
Guide's hydraulic pump 7 connects hydraulic pilot valve 6; The swing arm 1 of band tablet 3 connects moved arm lifting oil cylinder 2; Be connected with distributing valve 10 between working solution press pump 8 and the moved arm lifting oil cylinder 2; Hydraulic pilot valve 6 interconnects with distributing valve 10, and hydraulic pilot valve 6 connects relays 5, relay 5 connect on the swing arms 1 near switch 4.
Guide's hydraulic pump 7 is connected with hydraulic pilot valve 6 and for it provides pilot pressure oil, the control crank that pulls back hydraulic pilot valve 6 is to the moved arm lifting position among the figure, and this moment, the electromagnetic actuation inner with it unclamped hand, and the hydraulic pilot valve remains on the moved arm lifting position.Simultaneously pilot pressure oil gets into distributing valves 10 through hydraulic pilot valve 6, and the spool of distributing valve 10 is pushed into the moved arm lifting position, thereby changes the flow direction of the hydraulic oil that the working solution press pump produces, and makes pressure oil get into the big chamber of moved arm lifting oil cylinder 2, promotes swing arm 1 upwards lifting; When swing arm 1 gives rise to the position that configures; The tablet 3 that is installed on the swing arm 1 is responded near switch 4; Send the signal of telecommunication near switch 4 and give relay 5; Relay 5 makes the electromagnet instant cut-off in the hydraulic pilot valve 6, and hydraulic pilot valve control crank is got back to meta under the effect of back-moving spring, because there is not the spool of the effect distributing valve 10 of guide's hydraulic oil under the effect of back-moving spring, also to get back to meta.Working solution press pump 8 stops to the big chamber of moved arm lifting oil cylinder 2 fuel feeding, and swing arm 1 stops lifting; In the course of work, the elastic force that pulling force that can armrest during lift height that swing arm 1 lift height need surpass be set once in a while overcomes the back-moving spring of hydraulic pilot valve 6 makes swing arm 1 continue lifting; When needing swing arm 1 lift height, also can rely on suction that the thrust of hand overcomes electromagnet that the handle of hydraulic pilot valve 6 is pushed into meta and makes swing arm 1 stop lifting less than the lift height set.The lift height of swing arm 1 can be set with the relative position of swing arm 1 through regulating tablet 3.
Claims (1)
1. moved arm lifting stopping means; Guide's hydraulic pump connects the hydraulic pilot valve; The swing arm of band tablet connects the moved arm lifting oil cylinder, is connected with distributing valve between working solution press pump and the moved arm lifting oil cylinder, and hydraulic pilot valve and distributing valve interconnect; It is characterized in that: the hydraulic pilot valve connects relay, relay connect on the swing arm near switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120358298 CN202298691U (en) | 2011-08-30 | 2011-08-30 | Lifting limiting device with movable arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120358298 CN202298691U (en) | 2011-08-30 | 2011-08-30 | Lifting limiting device with movable arm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202298691U true CN202298691U (en) | 2012-07-04 |
Family
ID=46367620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120358298 Expired - Fee Related CN202298691U (en) | 2011-08-30 | 2011-08-30 | Lifting limiting device with movable arm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202298691U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888866A (en) * | 2012-11-05 | 2013-01-23 | 中外合资沃得重工（中国）有限公司 | Hydraulic circuit capable of accurately controlling lifting height of movable arm of excavator |
| CN103590436A (en) * | 2013-11-13 | 2014-02-19 | 徐工集团工程机械股份有限公司科技分公司 | Intelligent shoveling bus controlling system of loader |
| CN106062284A (en) * | 2014-05-14 | 2016-10-26 | 株式会社Kcm | Working vehicle |
| CN106461143A (en) * | 2014-04-15 | 2017-02-22 | 凯斯纽荷兰(中国)管理有限公司 | Swivel joint with hydraulic position signal |
-
2011
- 2011-08-30 CN CN 201120358298 patent/CN202298691U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888866A (en) * | 2012-11-05 | 2013-01-23 | 中外合资沃得重工（中国）有限公司 | Hydraulic circuit capable of accurately controlling lifting height of movable arm of excavator |
| CN103590436A (en) * | 2013-11-13 | 2014-02-19 | 徐工集团工程机械股份有限公司科技分公司 | Intelligent shoveling bus controlling system of loader |
| CN103590436B (en) * | 2013-11-13 | 2015-08-19 | 徐工集团工程机械股份有限公司科技分公司 | Load mechanical shovel dress Intelligent bus control system |
| CN106461143A (en) * | 2014-04-15 | 2017-02-22 | 凯斯纽荷兰(中国)管理有限公司 | Swivel joint with hydraulic position signal |
| US10139026B2 (en) | 2014-04-15 | 2018-11-27 | Cnh Industrial America Llc | Swivel joint with hydraulic position signal |
| CN106461143B (en) * | 2014-04-15 | 2019-03-15 | 凯斯纽荷兰(中国)管理有限公司 | Swivel joint with hydraulic position signal |
| CN106062284A (en) * | 2014-05-14 | 2016-10-26 | 株式会社Kcm | Working vehicle |
| CN106062284B (en) * | 2014-05-14 | 2018-01-23 | 株式会社Kcm | Working truck |
| US10358794B2 (en) | 2014-05-14 | 2019-07-23 | Kcm Corporation | Work vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20160830 |