CN201670154U - Cushioning device for luffing cylinder of crane jib - Google Patents
Cushioning device for luffing cylinder of crane jib Download PDFInfo
- Publication number
- CN201670154U CN201670154U CN 201020180934 CN201020180934U CN201670154U CN 201670154 U CN201670154 U CN 201670154U CN 201020180934 CN201020180934 CN 201020180934 CN 201020180934 U CN201020180934 U CN 201020180934U CN 201670154 U CN201670154 U CN 201670154U
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- oil
- rodless cavity
- oil cylinder
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- control
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Abstract
The utility model relates to a cushioning device for a luffing cylinder of a crane jib, which comprises a hydraulic oil tank, a hydraulic pump, a safety valve and a control valve. The control oil line of the control valve is connected with an oil inlet of a balance valve. The two oil outlets of the balance valve are respectively connected with a rodless cavity and a rod cavity of the luffing cylinder. A tee joint is arranged between the rodless cavity of the luffing cylinder and the balance valve. A third oil port of the tee joint is connected with an energy accumulator. The oil line between the oil port of the rodless cavity of the luffing cylinder and the balance valve is provided with a pipe tee joint. One end of the tee joint is connected with the rodless cavity of the luffing cylinder and the other end thereof is connected with the balance valve. The third oil port is connected with the energy accumulator. As the energy accumulator can absorb some impact loads, the vibration of the complete machine is reduced.
Description
Technical field
The utility model relates to a kind of tractor truck, is specifically related to a kind of tractor truck arm.
Background technology
Existing technology wrecker leads by the process of tow lift (being called for short " failed vehicle ") as shown in Figure 1 in holder, and wrecker 10 is by arm 8 traction failed vehicles 9, and arm 8 is realized various mode of operations by the amplitude oil cylinder 5 that links to each other with wrecker 10.Because ground-surface jolts, and failed vehicle is applied to the load of trailing arm end for impacting reverse load, arm amplitude oil cylinder control manually operated is limited by existing technology in this process, above-mentioned reverse load is bigger to the in good time load influence of front and back bridge in the wrecker traveling process.Especially for propons, excessive impact load can directly reduce the adhesive ability of wrecker front-wheel road pavement, thereby has influence on the safety of travelling when wrecker is rescued.Existing technology has the following disadvantages when the traction walking for the control of wrecker arm luffing hydraulic actuating cylinder:
1. the bigger vibratory impulse that travels has reduced the comfort type that the driver and conductor takes;
2. to travel vibratory impulse and guarantee traffic safety in order to reduce, must adopt lower moving velocity, reduced the complete machine work efficiency;
3. in order to reduce the influence of above-mentioned vibratory impulse to wrecker propons adhesive ability, existing technology adopts the chassis of selecting for use than Long Wheelbase (among Fig. 1 " L ") as the wrecker chassis, and wrecker complete machine cost is increased, and economic benefit descends.
The utility model content
The purpose of this utility model is at above-mentioned the deficiencies in the prior art, a kind of arm amplitude oil cylinder shock absorber is provided, by energy storage absorption portion impact load, reduce vibrating effect to complete machine, improved the driver and conductor comfort level, improved work efficiency, reduced the complete machine cost.
The technical solution of the utility model realizes in the following manner:
A kind of arm amplitude oil cylinder shock absorber, comprise hydraulic reservoir, Hydraulic Pump, safety valve and control cock, the control oil channel of control cock links to each other with the oil inlet of balance cock, two oil outlets of balance cock link to each other with rod chamber with the rodless cavity of amplitude oil cylinder respectively, be provided with threeway between the rodless cavity of amplitude oil cylinder and the balance cock, the 3rd hydraulic fluid port of threeway connects energy storage.
Two delivery lines about above-mentioned balance cock comprises, the left side delivery line is provided with check valve and main valve plug, the oil inlet of main valve plug links to each other with control cock, and the oil outlet of main valve plug links to each other with the rodless cavity of amplitude oil cylinder, and the control oil channel of main valve plug links to each other with the right side delivery line; The oil inlet of check valve links to each other with control cock, and the oil outlet of check valve links to each other with the rodless cavity of amplitude oil cylinder.
The utility model adds a pipeline threeway with amplitude oil cylinder rodless cavity hydraulic fluid port to the oil circuit between the balance cock.Threeway one termination amplitude oil cylinder rodless cavity, another termination balance cock, the 3rd hydraulic fluid port connects energy storage.By energy storage absorption portion impact load, thereby reach the effect that reduces complete machine oscillation.
Description of drawings
The failed vehicle working state schematic representation is led in the wrecker holder in this prior art of Fig. 1;
Fig. 2 is a hydraulic schematic diagram of the present utility model.
The specific embodiment
As shown in Figure 2, the utility model comprises hydraulic reservoir 7, Hydraulic Pump 1, safety valve 6 and control cock 2, the control oil channel of control cock 2 links to each other with the oil inlet of balance cock 3, two oil outlets of balance cock 3 link to each other with rod chamber with the rodless cavity of amplitude oil cylinder 5 respectively, be provided with threeway between the rodless cavity of amplitude oil cylinder 5 and the balance cock 3, the 3rd hydraulic fluid port of threeway connects energy storage 4.
Two delivery lines about described balance cock 3 comprises, the left side delivery line is provided with check valve 3-1 and main valve plug 3-2, the oil inlet of main valve plug 3-2 links to each other with control cock 2, the oil outlet of main valve plug 3-2 links to each other with the rodless cavity of amplitude oil cylinder 5, and the control oil channel of main valve plug 3-2 links to each other with the right side delivery line; The oil inlet of check valve 3-1 links to each other with control cock 2, and the oil outlet of check valve 3-1 links to each other with the rodless cavity of amplitude oil cylinder 5.
The utility model working process is as follows: when the failed vehicle walking is led in the wrecker holder, thereby Hydraulic Pump 1 is realized quitting work with the gear case disengaging by mechanical mechanism, control cock 2 mediates, and the control oil channel of two oil inlet V1, the V2 of balance cock 3 by control cock 2 is communicated with and in the T mouth takes back hydraulic reservoir 7 and off-load.In balance cock 3 inside, because C2-V2 oil circuit off-load, make the pilot pressure at Pil point place be lower than the response pressure value of balance cock 3 main valve plug 3-2, C1 to V1 direction oil circuit is blocked, amplitude oil cylinder rodless cavity hydraulic oil can't flow back to hydraulic reservoir 7 through the C1-V1 oil circuit, and the hydraulic oil in amplitude oil cylinder 5 rodless cavities, energy storage 4 inside and the oil circuit thereof is in the state of being closed at this moment.
When amplitude oil cylinder 5 suffered loads increased suddenly, amplitude oil cylinder 5 rodless cavity pressure strengthened thereupon, and pressure were conducted in the energy storage 4 through oil circuit, by the equation of state of idea1 gas:
(
T is thermodynamic temperature (K))
As can be known, gas volume in the energy storage 4 is corresponding to be compressed, the corresponding increasing of oil storage volume, increased pressure, this variation until thrust that amplitude oil cylinder 5 rodless cavity pressure are produced with increase after outer load stop when setting up new balance, thereby the impact of buffering (absorptions) part.Said process, volume reduces hydraulic oil in amplitude oil cylinder 5 rodless cavities along with the increasing gradually that shoe cream room to energy storage 4 flows of pressure, the corresponding retraction of amplitude oil cylinder 5 piston rods, the amplitude oil cylinder corresponding increasing of 5 rod chamber volumes is also carried out repairing by the C2-V2-B1-T oil circuit from hydraulic reservoir 7.
When amplitude oil cylinder 5 suffered loads reduce, amplitude oil cylinder 5 rodless cavity pressure reduce thereupon, and pressure is conducted in the energy storage 4 through oil circuit, under the effect of thermodynamic equilibrium principle, gas volume in the energy storage 4 is corresponding to be increased, the oil storage volume correspondingly reduces, pressure descends gradually, until thrust that amplitude oil cylinder 5 rodless cavity pressure are produced with change after outer load stop when setting up new balance.Said process, amplitude oil cylinder 5 rodless cavity volumes strengthen and obtain required hydraulic oil from the shoe cream room of energy storage 4, corresponding the stretching out of amplitude oil cylinder 5 piston rods, amplitude oil cylinder 5 rod chamber volumes reduce and corresponding hydraulic oil are flowed back to hydraulic reservoir 7 by the C2-V2-B1-T oil circuit.
Claims (2)
1. arm amplitude oil cylinder shock absorber, comprise hydraulic reservoir (7), Hydraulic Pump (1), safety valve (6) and control cock (2), the control oil channel of control cock (2) links to each other with the oil inlet of balance cock (3), two oil outlets of balance cock (3) link to each other with rod chamber with the rodless cavity of amplitude oil cylinder (5) respectively, it is characterized in that: be provided with threeway between the rodless cavity of amplitude oil cylinder (5) and the balance cock (3), the 3rd hydraulic fluid port of threeway connects energy storage (4).
2. arm amplitude oil cylinder shock absorber according to claim 1, it is characterized in that: two delivery lines about described balance cock (3) comprises, the left side delivery line is provided with check valve (3-1) and main valve plug (3-2), the oil inlet of main valve plug (3-2) links to each other with control cock (2), the oil outlet of main valve plug (3-2) links to each other with the rodless cavity of amplitude oil cylinder (5), and the control oil channel of main valve plug (3-2) links to each other with the right side delivery line; The oil inlet of check valve (3-1) links to each other with control cock (2), and the oil outlet of check valve (3-1) links to each other with the rodless cavity of amplitude oil cylinder (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020180934 CN201670154U (en) | 2010-05-06 | 2010-05-06 | Cushioning device for luffing cylinder of crane jib |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020180934 CN201670154U (en) | 2010-05-06 | 2010-05-06 | Cushioning device for luffing cylinder of crane jib |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201670154U true CN201670154U (en) | 2010-12-15 |
Family
ID=43327566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020180934 Expired - Fee Related CN201670154U (en) | 2010-05-06 | 2010-05-06 | Cushioning device for luffing cylinder of crane jib |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201670154U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103407916A (en) * | 2013-09-02 | 2013-11-27 | 徐州重型机械有限公司 | Luffing oil cylinder buffer device and crane |
| CN106979181A (en) * | 2017-05-15 | 2017-07-25 | 山东大学 | The energy-efficient hydraulic servo-cylinder controlled with bidirectional buffering and accurate power |
| CN109094446A (en) * | 2018-10-17 | 2018-12-28 | 宋国华 | A kind of special-purpose vehicle for rescue of removing obstacles |
-
2010
- 2010-05-06 CN CN 201020180934 patent/CN201670154U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103407916A (en) * | 2013-09-02 | 2013-11-27 | 徐州重型机械有限公司 | Luffing oil cylinder buffer device and crane |
| CN106979181A (en) * | 2017-05-15 | 2017-07-25 | 山东大学 | The energy-efficient hydraulic servo-cylinder controlled with bidirectional buffering and accurate power |
| CN106979181B (en) * | 2017-05-15 | 2018-06-08 | 山东大学 | The energy-efficient hydraulic servo-cylinder controlled with bidirectional buffering and accurate power |
| CN109094446A (en) * | 2018-10-17 | 2018-12-28 | 宋国华 | A kind of special-purpose vehicle for rescue of removing obstacles |
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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 |
Granted publication date: 20101215 Termination date: 20160506 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |