CN2474567Y - Two speed hydraulic rail jack - Google Patents
Two speed hydraulic rail jack Download PDFInfo
- Publication number
- CN2474567Y CN2474567Y CN 01239115 CN01239115U CN2474567Y CN 2474567 Y CN2474567 Y CN 2474567Y CN 01239115 CN01239115 CN 01239115 CN 01239115 U CN01239115 U CN 01239115U CN 2474567 Y CN2474567 Y CN 2474567Y
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- CN
- China
- Prior art keywords
- valve
- piston rod
- oil
- hydraulic cylinder
- small
- 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 relates to a two-speed hydraulic track jack, comprises a hand column piston pump, an oil suction valve, a screen, an oil box, a check valve, a hand spill valve, a security valve, a lifting piston rod, a chief hydraulic cylinder. The utility model is characterized in that the lifting piston rod which is tube structure and acts as a small hydraulic cylinder, is formed double hydraulic cylinders with the chief hydraulic cylinder, a small plunger is equipped in the small hydraulic cylinder, a release valve is equipped on the top of the lifting piston rod, an oil suction one-way valve and an oil scavenger one-way valve are equipped at the bottom of the chief hydraulic cylinder. The utility model can use two speeds to lift, lifting units can contact weights rapidly at the operation to improve the working efficiency, the lifting piston rod has the advantages of one part with two dual-purpose functions, not only enables the structure of whole machine compact, but also reduces the weight.
Description
The utility model relates to a kind of dual-speed hydraulic rail jack of track lifting operation when being used for the railroad track maintenance.
Existing hydraulic pressure rail jack, handlance make a round trip height that the jacking parts rise promptly the amount of hoisting be a fixed number, determine when this numerical value is the rail jack design.When the handlance operational torque limited within the specific limits, the track lifting power of rail jack was big more, and then the amount of hoisting is more little.When the track lifting operation, the jacking parts of rail jack with by the weight of jacking one segment distance is always arranged, the operator wishes that the jacking parts can touch weight fast, existing rail jack does not have this performance, so operating efficiency is lower.
The purpose of this utility model is in order to overcome the shortcoming of prior art, even provide a kind of dual-speed hydraulic rail jack rail jack that two kinds of amounts of hoisting are arranged, be that the jacking parts have two kinds of speed, can make rail jack when non-loaded or little load, the bigger amount of hoisting is arranged, big top lift is arranged when heavy load, and the amount of hoisting diminishes thereupon when big top lift.
The technical solution of the utility model is achieved like this, it comprises the hand plunger displacement pump, oil sucting valve, screen pack, fuel tank, flap valve, manual oil return valve, safety valve, the jacking piston rod, master cylinder, pressure regulator valve, handle, be characterized in: at the jacking piston rod is a tubular construction double as small oil tank, form two oil cylinders with master cylinder, be built-in with small plunger at small oil tank, one in jacking piston rod is dual-purpose, it is the piston rod of master cylinder, it is again the oil cylinder of small plunger, for exhaust, top at the jacking piston rod is equipped with vent valve, do not make when the jacking piston rod is risen and cause vacuum in the master cylinder, be equipped with oil sucting one-way valve, for the oil return of master cylinder also is provided with return check valve in the master cylinder bottom.
Because the utility model has two kinds of amounts of hoisting, be that the jacking parts have two kinds of speed, the jacking parts can contact weight fast when the track lifting operation, increase work efficiency, because small oil tank is made in the jacking piston rod, make one in jacking piston rod dual-purpose again, it is the piston rod of master cylinder, be again the oil cylinder of small plunger, make its compact conformation, alleviated complete machine weight.
The utility model embodiment is described further in conjunction with the accompanying drawings.
Fig. 1 is a dual-speed hydraulic rail jack structure principle chart.
By shown in Figure 1, the dual-speed hydraulic rail jack comprises hand plunger displacement pump 1, oil sucting valve 2, screen pack 3, fuel tank 4, flap valve 5, manual oil return valve 6, safety valve 7, jacking piston rod 11, master cylinder 12, pressure regulator valve 14, handle 15, be characterized in: at jacking piston rod 11 is a tubular construction double as small oil tank, form two oil cylinders with master cylinder, be built-in with small plunger 10 at small oil tank, one in jacking piston rod is dual-purpose, it is the piston rod of master cylinder, it is again the oil cylinder of the small plunger 10 set up, for exhaust, be equipped with vent valve 13 at the top of jacking piston rod 11, do not make when the jacking piston rod is risen and cause vacuum in the master cylinder, be equipped with oil sucting one-way valve 8 in master cylinder bottom, for the oil return of master cylinder also is provided with return check valve 9.Adopted twin-tub mechanism, when zero load or underloading, the hydraulic oil that handlance is discharged enters in the small oil tank through the interstitial hole of small plunger 10, jacking piston rod 11 is risen, because the diameter of small plunger 10 is less, so the amount of liter is bigger, but top lift is less, when jacking piston rod 11 pushed up weight, the pressure of hydraulic system increased thereupon, and pressure regulator valve 14 is opened, the hydraulic oil that handlance is discharged enters master cylinder 12 simultaneously, at this moment the bearing area increase of jacking piston rod 11 is master cylinder internal diameter sectional area, so the top lift increase, and the amount of hoisting reduces thereupon.
Claims (1)
1, a kind of dual-speed hydraulic rail jack, it comprises hand plunger displacement pump (1), oil sucting valve (2), screen pack (3), fuel tank (4), flap valve (5), manual oil return valve (6), safety valve (7), jacking piston rod (11), master cylinder (12), pressure regulator valve (14) and handle (15), it is characterized in that,: jacking piston rod (11) but be a tubular construction double as small oil tank, form two oil cylinders with master cylinder (12), be built-in with small plunger (10) at small oil tank, be equipped with vent valve (13) at the top of jacking piston rod (11), be equipped with oil sucting one-way valve (8) and return check valve (9) in the master cylinder bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01239115 CN2474567Y (en) | 2001-04-28 | 2001-04-28 | Two speed hydraulic rail jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01239115 CN2474567Y (en) | 2001-04-28 | 2001-04-28 | Two speed hydraulic rail jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2474567Y true CN2474567Y (en) | 2002-01-30 |
Family
ID=33651615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01239115 Expired - Fee Related CN2474567Y (en) | 2001-04-28 | 2001-04-28 | Two speed hydraulic rail jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2474567Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269197A (en) * | 2011-07-21 | 2011-12-07 | 淮安天工传动科技有限公司 | Multi-stage double-acting oil cylinder of hydraulic rail jack |
-
2001
- 2001-04-28 CN CN 01239115 patent/CN2474567Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269197A (en) * | 2011-07-21 | 2011-12-07 | 淮安天工传动科技有限公司 | Multi-stage double-acting oil cylinder of hydraulic rail jack |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |