CN202811627U - Excavating machine oil cylinder with safety valve - Google Patents
Excavating machine oil cylinder with safety valve Download PDFInfo
- Publication number
- CN202811627U CN202811627U CN 201220444605 CN201220444605U CN202811627U CN 202811627 U CN202811627 U CN 202811627U CN 201220444605 CN201220444605 CN 201220444605 CN 201220444605 U CN201220444605 U CN 201220444605U CN 202811627 U CN202811627 U CN 202811627U
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- China
- Prior art keywords
- safety valve
- piston
- oil
- piston rod
- oil cylinder
- 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
The utility model discloses an excavating machine oil cylinder with a safety valve. The oil cylinder is characterized in that a piston rod is arranged in a cylinder barrel, a piston is in threaded connection with one end of the piston rod, a floating cushion collar which is sleeved on the piston rod is arranged adjacent to one side of the piston, a floating buffer rod is laterally arranged in the center of the piston rod on the other side of the piston, and the safety valve is arranged in an oil duct on a cylinder base. Through the arrangement, constant deceleration is realized when buffering is performed at a tail end of an oil cylinder stroke; and after the oil cylinder is started, hydraulic oil is discharged through a pin hole, the pressure of an oil inlet pipe is increased, the safety valve is opened, and the hydraulic oil quickly reaches a large cavity of the oil cylinder through the safety valve to push the piston to move outwards.
Description
Technical field
The utility model relates to a kind of middle high-pressure excavator oil cylinder, is specifically related to a kind of band safety valve excavator oil cylinder.
Background technique
High for present excavator frequency of utilization, motion speed waits features soon, for reducing mechanical shock to the bump of oil cylinder and equipment, require excavator to introduce buffering at end of travel, but because buffer plunger or cushion collar to the sealing process of fluid, often cause oil cylinder to start slowly or difficulty in starting, breakout pressure moment rising etc., sealing system is produced hydraulic shock, cause working efficiency to reduce, serious also can cause bad seals etc.
Summary of the invention
The purpose of this utility model is that a kind of band safety valve excavator oil cylinder is provided.
To achieve these goals, the utility model is provided with piston rod in the inside of cylinder barrel, end at piston rod has been threaded connection piston, side adjacent at piston is provided with a floating buffer cover that is linked on the piston rod, floating buffer cover and the corresponding cooperation of guide sleeve that is located at cylinder barrel one end inwall, center at the opposite side piston rod of piston laterally is provided with the floating buffer bar, and floating buffer bar and the corresponding cooperation of the oil duct on being located at cylinder bottom, safety valve 7 are located in the oil duct on the cylinder bottom.Described safety valve is made of spool, spring, spring seat and plug, and spring supports spool, and spring seat is located at the lower end of spring, plug with spool, spring and spring seat in the lump shutoff in oil duct.
By above setting, when the utility model entered buffering at the end of oil cylinder stroke, safety valve kept closed condition under spring and backpressure effect, and main oil gallery is sealed gradually, stranded hydraulic oil can only by the safety valve central needle hole with controlled speed oil return, slow down thereby realize sparing; Hydraulic oil is fuel-displaced by pin hole when oil cylinder starts, but is not enough to pushing piston, and oil inlet pipe pressure raises, and overcomes spring force, and safety valve is opened, and hydraulic oil arrives rapidly the large chamber of oil cylinder by safety valve, and pushing piston outwards moves.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the C section enlarged view of Fig. 1.
Among the figure: 1, cylinder barrel, 2, piston rod, 3, piston, 4, the floating buffer cover, 5, guide sleeve, 6, the floating buffer bar, 7, cylinder bottom, 8, safety valve, 9, spool, 10, spring, 11, spring seat, 12, plug.
Embodiment
As shown in Figure 1, 2, the utility model is provided with piston rod 2 in the inside of cylinder barrel 1, end at piston rod 2 has been threaded connection piston 3, side adjacent at piston 3 is provided with a floating buffer cover 4 that is linked on the piston rod 2, floating buffer cover 4 and the guide sleeve 5 corresponding cooperations that are located at cylinder barrel 1 one end inwalls, center at the opposite side piston rod 2 of piston 3 laterally is provided with floating buffer bar 6, floating buffer bar 6 be located at cylinder bottom 7 on the corresponding cooperation of oil duct, safety valve 8 is located in the oil duct on the cylinder bottom 7.Described safety valve 8 is made of spool 9, spring 10, spring seat 11 and plug 12, and spring 10 supports spool 9, and spring seat 11 is located at the lower end of spring 10, plug 12 with spool 9, spring 10 and spring seat 11 in the lump shutoff in oil duct.
By above setting, the utility model is when piston rod 2 is overhanging, because floating buffer bar 6 has sealed main oil gallery, hydraulic oil can only be fuel-displaced by the damping hole in the middle of the safety valve 8, instantaneous pressure raises, pressure difference appears in safety valve 8 both sides, promotion spool 9 overcomes the elastic force of spring 10 and opens, hydraulic oil is full of rapidly large chamber by the side oil duct, pushing piston 3 motions, and floating buffer bar 6 breaks away from the oil duct of cylinder bottom 7, hydraulic oil flows out by main oil gallery, safety valve 8 pressure at both sides balances, spool 9 closure that resets under spring 10 effect, the oil cylinder start-up course finishes.When piston rod 2 retracts to end, wherein working connection is sealed not oil return by floating buffer bar 6, and spool 9 is closed under pressure and spring 10 effects, and stranded hydraulic oil can only be from middle damping hole oil return on the spool 9, make piston rod 2 movement velocitys reduce gently, reduce the impact to oil cylinder.
Claims (2)
1. band safety valve excavator oil cylinder, it is characterized in that: the inside at cylinder barrel is provided with piston rod, end at piston rod has been threaded connection piston, side adjacent at piston is provided with a floating buffer cover that is linked on the piston rod, floating buffer cover and the corresponding cooperation of guide sleeve that is located at cylinder barrel one end inwall, center at the opposite side piston rod of piston laterally is provided with the floating buffer bar, floating buffer bar and the corresponding cooperation of the oil duct on being located at cylinder bottom, safety valve are located in the oil duct on the cylinder bottom.
2. a kind of band safety valve excavator oil cylinder according to claim 1, it is characterized in that: described safety valve is made of spool, spring, spring seat and plug, spring supports spool, and spring seat is located at the lower end of spring, plug with spool, spring and spring seat in the lump shutoff in oil duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220444605 CN202811627U (en) | 2012-09-03 | 2012-09-03 | Excavating machine oil cylinder with safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220444605 CN202811627U (en) | 2012-09-03 | 2012-09-03 | Excavating machine oil cylinder with safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202811627U true CN202811627U (en) | 2013-03-20 |
Family
ID=47870509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220444605 Expired - Fee Related CN202811627U (en) | 2012-09-03 | 2012-09-03 | Excavating machine oil cylinder with safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202811627U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111765141A (en) * | 2020-06-29 | 2020-10-13 | 徐州徐工随车起重机有限公司 | Bidirectional impact-proof hydraulic telescopic oil cylinder for lorry-mounted crane |
-
2012
- 2012-09-03 CN CN 201220444605 patent/CN202811627U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111765141A (en) * | 2020-06-29 | 2020-10-13 | 徐州徐工随车起重机有限公司 | Bidirectional impact-proof hydraulic telescopic oil cylinder for lorry-mounted crane |
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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: 20130320 Termination date: 20190903 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |