CN102555877A - Lifting device of dump truck - Google Patents
Lifting device of dump truck Download PDFInfo
- Publication number
- CN102555877A CN102555877A CN2012100595592A CN201210059559A CN102555877A CN 102555877 A CN102555877 A CN 102555877A CN 2012100595592 A CN2012100595592 A CN 2012100595592A CN 201210059559 A CN201210059559 A CN 201210059559A CN 102555877 A CN102555877 A CN 102555877A
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- Prior art keywords
- valve
- valve rod
- rod
- load
- lifting device
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- 230000003139 buffering effect Effects 0.000 claims description 19
- 239000006096 absorbing agent Substances 0.000 claims description 7
- 230000035939 shock Effects 0.000 claims description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 12
- 239000010720 hydraulic oil Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- Actuator (AREA)
Abstract
The invention discloses a lifting device of a dump truck, comprising a support frame; a lifting frame and the bottom of a cylinder are articulated on the support frame and the top part of a piston rod is articulated on a hydraulic cylinder on the lifting frame, and at least two hydraulic cylinders are arranged. Compared with the prior art, the lifting device has the beneficial effects that: the lifting device can solve the problems that the existing lifting device of the dump truck is out of synchronization, the stress of the cylinder is uneven and the lifting operation is not stable.
Description
Technical field
The present invention relates to goods carrying vehicle manufacturing technology field, especially a kind of lifting device that is used for the dumping car unloading.
Background technology
Mostly the unloading of dumping car at present is that employing is contained in the lifting device that contains hydraulic ram under the dumping car railway carriage castering action of railway carriage is realized.And the arrangement of the lifting device of dumping car under the dumping car railway carriage mainly contains forward type and middle, in middle, divides single fluid cylinder middle and two kinds of schemes of biliquid cylinder middle again; Single fluid cylinder middle is that the lifting device that contains a hydraulic ram is contained in the railway carriage central region; The deficiency of this structure is that the hydraulic ram power of bearing is big, and lifting is reliable and stable inadequately, and because of having only an oil cylinder, in case oil cylinder breaks down, whole lifting device can't be accomplished discharged task; Biliquid cylinder middle is the both sides that two hydraulic rams are arranged in the dumping car subframe; Biliquid cylinder middle requires two oil cylinder synchronous workings, but two oil cylinder asynchrony phenomenons happen occasionally in reality, and especially when lade weight was inhomogeneous, it is poorer that stability is dumped by system; Lifting is asynchronous, and cylinder force is uneven, even the generation of unexpected roll-over accident might cause lifting the time.
Summary of the invention
Technical matters to be solved by this invention provides a kind of dumping car lifting device, can separate
The existing dumping car lifting device cylinder force of determining is uneven, the problem that lifting is reliable and stable inadequately.
In order to address the above problem; Technical scheme of the present invention is: this dumping car lifting device; Include bracing frame, lifting frame and cylinder body bottom are hinged on support frame as described above and piston rod part is hinged on the hydraulic ram on the said lifting frame, and said hydraulic ram has two at least.
More concrete scheme can be: be provided with relief arrangement in the said hydraulic ram; Said relief arrangement comprises the piston that is provided with the off-load valve opening; The off-load valve rod that includes valve plug portion and valve stem is housed in said off-load valve opening; Said off-load valve opening is a circular hole, and the cross-sectional plane of the valve stem of said off-load valve rod is an on-circular cross-section; The valve plug portion of said off-load valve rod is a plug; The side of the valve stem of said off-load valve rod is provided with drain pan.
More concrete scheme can also be: be provided with shock absorber in the said hydraulic ram; Said shock absorber includes piston rod, buffering valve rod, valve seat and spring; One end of said buffering valve rod is contained in the inner hole of said piston rod versatilely, and said spring is contained between said piston rod and the said buffering valve rod; The cross-sectional plane of said buffering valve rod leading section is less than the seal of said valve seat; The lateral surface of said buffering valve rod leading section is a circular conical surface.
Because having adopted technique scheme, the present invention compared with prior art to have has beneficial effect as follows
Really:
1, because of two above hydraulic rams are hinged between support frame as described above and the said lifting frame side by side, cylinder force is more equal, and the lifting synchronism is better, and good stability dumps in system;
2,, can reach the purpose of accurate control plunger unloaded position in the relief arrangement through the length of design off-load valve rod because hydraulic ram is provided with relief arrangement; Relief arrangement is simple in structure, and hydraulic ram is in end of travel off-load reliable in action;
3, because hydraulic ram is provided with shock absorber; Entering oil inlet and outlet place buffering valve rod one end in the completion of discharge rear buffering device at first is cone; Subtract flow velocity degree smooth variation; The compartment is slowly dropped on the vehicle frame reposefully, avoid bump to cause whole hydraulic lifting system and vehicle frame and dumping car chassis are caused damage.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention one;
Fig. 2 is the structural representation of the embodiment of the invention one hydraulic ram;
Fig. 3 is the cross sectional representation of the unloader valve bar valve stem of the embodiment of the invention one;
Fig. 4 is the cross sectional representation of the unloader valve bar valve stem of the embodiment of the invention two;
Fig. 5 is the cross sectional representation of the unloader valve bar valve stem of the embodiment of the invention three;
Fig. 6 is the cross sectional representation of the unloader valve bar valve stem of the embodiment of the invention four;
Fig. 7 is the cross sectional representation of the unloader valve bar valve stem of the embodiment of the invention five.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified:
Fig. 1, dumping car lifting device shown in Figure 2; Comprise being used to be welded on the supermedial bracing frame 1 of dumping car vehicle frame that the lifting frame 3 that is used to be welded on the railway carriage bottom is hinged on bracing frame 1 with the cylinder body bottom and piston rod 6 tops are hinged on the hydraulic ram 2 on the lifting frame 3; Two hydraulic rams 2 are hinged between bracing frame 1 and the lifting frame 3 side by side.
Be provided with relief arrangement in the hydraulic ram 2; This relief arrangement includes cylinder body 4; Be fixed on the piston 5 on the piston rod 6, on piston 5, have one and be the off-load valve opening of straight circular hole, the off-load valve rod 9 that includes valve plug portion and valve stem is housed in said off-load valve opening; The side of the valve stem of off-load valve rod 9 is intersected face by three planes and the face of cylinder and is become, and its cross-sectional plane is as shown in Figure 3; Hydraulic oil can flow through from said plane; Side in the valve stem of other embodiment off-load valve rod 9 can directly be provided with drain pan, and the cross-sectional plane of the valve stem of off-load valve rod 9 can be the on-circular cross-section of other shapes, and hydraulic oil can flow through in oil groove; The valve stem valve plug portion of off-load valve rod 9 is a taper plug, and plug and off-load valve opening one end match, and can block unloader valve, and hydraulic oil can not be flow through; The valve stem termination is with the location of a back-up ring 8 when being used for off-load valve rod 9 and being moved to the left.
Also be provided with shock absorber in the hydraulic ram 2; This shock absorber includes buffering valve rod 10, installation sleeve 11 and spring 12; Piston rod 6 heads have a blind hole, and installation sleeve 11 is threaded in the blind hole oral area of piston rod 6 heads, and buffering valve rod 10 interts in installation sleeve 11; Buffering valve rod 10 has a positive stop lug boss at the end near said blind hole bottom, and the termination of the other end is a cone for one section; Spring 12 is sleeved on buffering valve rod 10 ends near said blind hole bottom.In the lifting process; The end that the high pressure oil that is produced by oil pump acts on buffering valve rod 10 through the oil inlet and outlets in the cylinder barrel base 7 get into promote in the cylinder body 4 buffering valve rods 10 with piston 5 motions leave the end face of cylinder barrel base 7, high pressure oil promotes piston 5 upward movements weight is lifted.In completion lifting process weight is laid down, after the hydraulic efficiency pressure system switching-over, under compartment deadweight effect; Piston 5 moves downward fast, and hydraulic oil flows back to fuel tank through the oil inlet and outlet of cylinder barrel base 7, at piston 5 downward rapid movement during near cylinder body 4 bottoms; Buffering valve rod 10 is that an end of cone inserts the oil inlet and outlet in the cylinder barrel base 7; Slowed down the return velocity of hydraulic oil, the speed that piston 5 and compartment are descended is slowed down, and the compartment drops on the vehicle frame lentamente; Avoid vehicle frame produce is impacted, thereby the corresponding protection effect is played on hoisting system and vehicle frame, dumping car chassis.
Among second embodiment of the present invention, the cross-sectional plane of the valve stem of off-load valve rod 9 is as shown in Figure 4, and other part is identical with embodiment one.
Among the 3rd embodiment of the present invention, the cross-sectional plane of the valve stem of off-load valve rod 9 is as shown in Figure 5, and other part is identical with embodiment one.
Among the 4th embodiment of the present invention, the cross-sectional plane of the valve stem of off-load valve rod 9 is as shown in Figure 6, and other part is identical with embodiment one.
Among the 5th embodiment of the present invention, the cross-sectional plane of the valve stem of off-load valve rod 9 is as shown in Figure 7, and other part is identical with embodiment one.
Claims (3)
1. a dumping car lifting device includes bracing frame, and lifting frame and cylinder body bottom are hinged on support frame as described above and piston rod part is hinged on the hydraulic ram on the said lifting frame, and it is characterized in that: said hydraulic ram has two at least.
2. dumping car lifting device according to claim 1; It is characterized in that: be provided with relief arrangement in the said hydraulic ram, said relief arrangement comprises the piston that is provided with the off-load valve opening, and the off-load valve rod that includes valve plug portion and valve stem is housed in said off-load valve opening; Said off-load valve opening is a circular hole; The cross-sectional plane of the valve stem of said off-load valve rod is an on-circular cross-section, and the valve plug portion of said off-load valve rod is a plug, and the side of the valve stem of said off-load valve rod is provided with drain pan.
3. dumping car lifting device according to claim 1; It is characterized in that: be provided with shock absorber in the said hydraulic ram; Said shock absorber includes piston rod, buffering valve rod, valve seat and spring; One end of said buffering valve rod is contained in the inner hole of said piston rod versatilely, and said spring is contained between said piston rod and the said buffering valve rod; The cross-sectional plane of said buffering valve rod leading section is less than the seal of said valve seat; The lateral surface of said buffering valve rod leading section is a circular conical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100595592A CN102555877A (en) | 2012-03-08 | 2012-03-08 | Lifting device of dump truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100595592A CN102555877A (en) | 2012-03-08 | 2012-03-08 | Lifting device of dump truck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102555877A true CN102555877A (en) | 2012-07-11 |
Family
ID=46402941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100595592A Pending CN102555877A (en) | 2012-03-08 | 2012-03-08 | Lifting device of dump truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102555877A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103754143A (en) * | 2013-12-26 | 2014-04-30 | 柳州正菱集团有限公司 | Footstock of oil cylinder of dumper truck |
| CN107618559A (en) * | 2017-09-28 | 2018-01-23 | 王庆太 | A kind of baby stroller |
| CN111720374A (en) * | 2020-06-30 | 2020-09-29 | 湖南响箭重工科技有限公司 | Pump truck with multi-stage telescopic support oil cylinder |
| RU207820U1 (en) * | 2021-08-11 | 2021-11-18 | Акционерное Общество "Ряжский Авторемонтный Завод" | BODY LIFTING MECHANISM |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57205242A (en) * | 1981-06-15 | 1982-12-16 | Kyokuto Kaihatsu Kogyo Co Ltd | Controlling apparatus of vehicle for loading and unloading container |
| CN101675269A (en) * | 2007-05-04 | 2010-03-17 | 谢夫勒两合公司 | Hydraulic belt tensioner comprising a special piston |
| CN201475446U (en) * | 2009-08-12 | 2010-05-19 | 金利红 | hydraulic unloading valve |
| CN201553071U (en) * | 2009-12-01 | 2010-08-18 | 中集车辆（集团）有限公司 | Lifting and balancing device and front top dump truck employing same |
| CN201808500U (en) * | 2010-09-08 | 2011-04-27 | 宝鸡华山工程车辆有限责任公司 | Special chassis for dump truck |
-
2012
- 2012-03-08 CN CN2012100595592A patent/CN102555877A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57205242A (en) * | 1981-06-15 | 1982-12-16 | Kyokuto Kaihatsu Kogyo Co Ltd | Controlling apparatus of vehicle for loading and unloading container |
| CN101675269A (en) * | 2007-05-04 | 2010-03-17 | 谢夫勒两合公司 | Hydraulic belt tensioner comprising a special piston |
| CN201475446U (en) * | 2009-08-12 | 2010-05-19 | 金利红 | hydraulic unloading valve |
| CN201553071U (en) * | 2009-12-01 | 2010-08-18 | 中集车辆（集团）有限公司 | Lifting and balancing device and front top dump truck employing same |
| CN201808500U (en) * | 2010-09-08 | 2011-04-27 | 宝鸡华山工程车辆有限责任公司 | Special chassis for dump truck |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103754143A (en) * | 2013-12-26 | 2014-04-30 | 柳州正菱集团有限公司 | Footstock of oil cylinder of dumper truck |
| CN107618559A (en) * | 2017-09-28 | 2018-01-23 | 王庆太 | A kind of baby stroller |
| CN111720374A (en) * | 2020-06-30 | 2020-09-29 | 湖南响箭重工科技有限公司 | Pump truck with multi-stage telescopic support oil cylinder |
| RU207820U1 (en) * | 2021-08-11 | 2021-11-18 | Акционерное Общество "Ряжский Авторемонтный Завод" | BODY LIFTING MECHANISM |
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| PB01 | Publication | ||
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Application publication date: 20120711 |