CN206886622U - Fork truck lifting oil cylinder with New Buffering structure - Google Patents
Fork truck lifting oil cylinder with New Buffering structure Download PDFInfo
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- CN206886622U CN206886622U CN201720514968.5U CN201720514968U CN206886622U CN 206886622 U CN206886622 U CN 206886622U CN 201720514968 U CN201720514968 U CN 201720514968U CN 206886622 U CN206886622 U CN 206886622U
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- oilhole
- centre bore
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Abstract
The utility model discloses a kind of fork truck lifting oil cylinder with New Buffering structure, including cylinder body, cylinder body lower end is fixed with cylinder bottom, there is piston rod in cylinder body, piston-rod lower end is provided with piston, and cylinder bottom is provided with oilhole and centre bore, oilhole communicates with centre bore, buffering axle sleeve is provided with centre bore, buffering axle sleeve one end is stretched into the central through hole of piston, there is gap between piston inner wall；Elongated hole and side oilhole are additionally provided with cylinder bottom, elongated hole communicates with side oilhole and oilhole, is provided with the first check valve in elongated hole, side oilhole is parallel with centre bore, and extends through the upper end of cylinder bottom.The utility model on cylinder bottom by setting elongated hole and side oilhole, fluid is set to be directly entered between piston and cylinder bottom, increase logical oily sectional area, reach the purpose of fast lifting, the first check valve is set in elongated hole again, make fluid can only gap oil return, play that falling is stable, the purpose of good buffer effect, the defects of effectively overcoming buffering effect difference existing for existing fork truck lifting oil cylinder.
Description
Technical field
A kind of lift oil tank is the utility model is related to, specifically a kind of apply has new delay on four-stage mast fork truck
Rush the fork truck lifting oil cylinder of structure.
Background technology
At present, fork truck lifting oil cylinder species is various, has plunger case, also there is piston cylinder.Existing piston cylinder as shown in figure 1,
Including cylinder body 101, the lower end of cylinder body 101 is fixed with cylinder bottom 109, there is piston rod 102 in cylinder body 101, and the lower end of piston rod 102, which is provided with, lives
112 are filled in, has cushion collar 103 in the center counterbore of piston 112, has gap between cushion collar 103 and the inwall of piston 112；On cylinder bottom 109
The first oilhole 108, the second oilhole 106, centre bore 110 and side oilhole 104 are provided with, stop valve 107 is provided with the first oilhole 108,
First oilhole 108 communicates with centre bore 110, the outlet obstruction of the second oilhole 106, the second oilhole 106 and centre bore 110 and side oil
Hole 104 communicates, and has steel ball 105 in the second oilhole 106, and side oilhole 104 extends through the upper end of cylinder bottom 109, is provided with centre bore 110 slow
Axle sleeve 111 is rushed, buffering axle sleeve 111 one end is stretched into the central through hole of cushion collar 103, has gap between cushion collar 103.Oil cylinder rises
During liter, on the one hand fluid is entered in the central through hole of buffering axle sleeve 111 by the first oilhole 108, then buffered axle sleeve 111 is with delaying
Gap between punching set 103 and between cushion collar 103 and the inwall of piston 112 is flowed between piston 112 and cylinder bottom 109, the opposing party
Face enters the second oilhole 106 by centre bore 110, then is directly entered by side oilhole 104 between piston 112 and cylinder bottom 109, reaches
To the purpose of fast lifting；When oil cylinder declines, under the pressure of fluid, steel ball movement, the second oilhole 106 is blocked, cause side oily
Hole 104 is obstructed, and the gap that fluid can only pass through between buffering axle sleeve 111 and cushion collar 103 is returned in fuel tank, plays decline buffering
Effect.The oil cylinder manufacture difficulty of this structure is big, needs strictly to coordinate between the oilhole 106 of steel ball 105 and second, if steel ball
105 can not completely plugged second oilhole 106, fluid can largely effect on decline buffering effect through the oil return of side oilhole 104.
Utility model content
In order to solve the problems, such as that prior art is present, the utility model provides a kind of fork truck with New Buffering structure and risen
Oil-lifting jar, the oil cylinder increase logical oily sectional area, reach working stability, good buffer effect by setting side oilhole in cylinder bottom
Purpose, the defects of effectively overcoming buffering effect difference existing for existing lift oil tank.
The utility model adopts the following technical scheme that：Fork truck lifting oil cylinder with New Buffering structure, including cylinder body, cylinder
Body lower end is fixed with cylinder bottom, there is piston rod in cylinder body, and piston-rod lower end is provided with piston；Cylinder bottom is provided with oilhole and centre bore, oil
Hole communicates with centre bore, buffering axle sleeve is provided with centre bore, buffering axle sleeve one end is stretched into the central through hole of piston, with work
There is gap between plug inwall；Elongated hole and side oilhole are additionally provided with cylinder bottom, side oilhole is connected, set in elongated hole by elongated hole with oilhole
There is the first check valve, side oilhole extends through the upper end of cylinder bottom.
The operation principle of fork truck lifting oil cylinder of the present utility model with New Buffering structure is：When oil cylinder raising,
Hydraulic oil enters in the centre bore of buffering axle sleeve from the oilhole of cylinder bottom, then enters from the gap between buffering axle sleeve and piston inner wall
Between piston and cylinder bottom, piston raising is promoted, it is unidirectional to set first due to being additionally provided with elongated hole and side oilhole on cylinder bottom, in elongated hole
Valve, because extraneous oil liquid pressure is more than oil cylinder inner fluid pressure, the first check valve is opened, and part fluid also passes through elongated hole and side
Oilhole is entered directly between piston and cylinder bottom, increases logical oily sectional area, and hydraulic oil circulates smoothly, not only lifting velocity
Hurry up, moreover it is possible to avoid the occurrence of oil cylinder it is big because of operating pressure during raising caused by impact cause door frame and the feelings shaken occur
Condition；When oil cylinder falls after rise, the first closed check valve, the hydraulic oil between cylinder bottom and piston can only enter from the centre bore of buffering axle sleeve
The centre bore of cylinder bottom, and then discharged by the oilhole of cylinder bottom, the oil area of hydraulic oil reduces, and makes the fluid of piston slow
Throttling, and then oil cylinder caused by avoiding piston slap cylinder bottom shakes, reaches that raising is quick, falls stable purpose after rise.
Piston is provided with counterbore, and piston upper end is provided with passage, and passage communicates with counterbore and rod chamber, is set in counterbore
There is the second check valve, because rod chamber is closed chamber, with the raising of oil cylinder, rod chamber volume is gradually reduced, gas in rod chamber
Pressure gradually increase, a downward pressure can be applied to piston, if without pressure release, oil cylinder lifting velocity certainly will be reduced, because
This, can carry out pressure release by passage, while the fluid of rodless cavity must also be prevented to enter rod chamber, therefore, on piston
Second check valve is set, and when rod chamber pressure is larger, the second check valve is opened, and reduces gas pressure in rod chamber, is ensureing oil
The lifting velocity of oil cylinder is effectively improved on the basis of cylinder stationarity.
There is Glais ring sealing between piston and inboard wall of cylinder block, there is support ring to coordinate with cylinder body on the outer peripheral face of piston.Under oil cylinder
When dropping to buffering area, because oil area reduces rapidly, the increase of hydraulic fluid pressure moment, Glais ring and support ring can effectively hinder
Only hydraulic oil improves the buffering effect of piston cylinder by entering between piston and inboard wall of cylinder block in rod chamber.
In summary, the fork truck lifting oil cylinder of the present utility model with New Buffering structure is prolonged by being set on cylinder bottom
Stretch hole and oily sectional area is led in oilhole increase in side, increase the flow velocity of hydraulic oil, prevent oil cylinder from occurring during raising and decline
Vibrations, ensure oil cylinder raising and the stationarity of decline.Setting for second check valve can also ensure the basis of oil cylinder stationarity
On effectively improve the lifting velocity of oil cylinder.
Brief description of the drawings
Fig. 1 is the schematic diagram of existing lower buffer lift oil cylinder.
Fig. 2 is the schematic diagram for the fork truck lifting oil cylinder that the utility model has New Buffering structure.
Fig. 3 is the side view of the piston for the fork truck lifting oil cylinder that the utility model has New Buffering structure.
Fig. 4 is the sectional view of the piston for the fork truck lifting oil cylinder that the utility model has New Buffering structure.
Fig. 5 is the sectional view of the cylinder bottom for the fork truck lifting oil cylinder that the utility model has New Buffering structure.
Embodiment
Embodiment of the present utility model is described specifically below in conjunction with the accompanying drawings：
Fork truck lifting oil cylinder with New Buffering structure, as shown in Fig. 2-Fig. 5, including cylinder body 201, the lower end of cylinder body 201
Cylinder bottom 208 is welded with, there is piston rod 215 in cylinder body 201, the lower end of piston rod 215 is provided with piston 214, piston 214 and cylinder body 201
There is Glais ring 213 to seal between inwall, there is support ring 212 to coordinate with cylinder body 201 on the outer peripheral face of piston 214.Open the lower end of piston 214
There is counterbore 204, the upper end of piston 214 is provided with passage 202, and passage 202 communicates with counterbore 204 and rod chamber, is set in counterbore 204
There is the second check valve 205.Cylinder bottom 208 is provided with oilhole 207, centre bore 206, elongated hole 209 and side oilhole 211, oilhole 207 with
Centre bore 206 is communicated, and elongated hole 209 connects side oilhole 211 with oilhole 207, and the first check valve 210 is provided with elongated hole 209,
Side oilhole 211 extends through the upper end of cylinder bottom 208；Buffering axle sleeve 203 is provided with centre bore 206, work is stretched into buffering axle sleeve 203 one end
In the central through hole for filling in 214 lower ends, there is gap between the inwall of piston 214.
During oil cylinder raising, the first check valve 210 is opened, and a part of fluid is directly entered from the oilhole 207 of cylinder bottom 208
In the centre bore of cylinder bottom 208, clearance flow between the centre bore of buffered axle sleeve 203 enters between buffering axle sleeve 203 and the inwall of piston 214
Enter between piston 214 and cylinder bottom 208, another part fluid passes through elongated hole 209 and side oilhole 211 from the oilhole 207 of cylinder bottom 208
It is directly entered between piston 214 and cylinder bottom 208, as the oil liquid pressure between piston 214 and cylinder bottom 208 increases, promotes oil cylinder
Raising, due to increasing logical oily sectional area, fluid is set to circulate more smooth, not only lifting velocity is fast, moreover it is possible to avoids the occurrence of oil cylinder
Impact causes door frame and situation about shaking occurs caused by operating pressure is big；And because rod chamber is closed chamber, with oil
The raising of cylinder, gas pressure increases in rod chamber, piston 214 can be given to apply a downward pressure, and reduce oil cylinder plays raising speed
Degree, the effect of the second check valve 208 is pressure release, makes pressure in rod chamber by passage 202, the pressure release of the second check valve 205,
Gas pressure in rod chamber is reduced, improves oil cylinder lifting velocity, additionally it is possible to prevents fluid counterbore 204 and the entrance of passage 202 from having
Rod cavity.When oil cylinder falls after rise, the first check valve 210 is closed, and the fluid between cylinder bottom 208 and piston 214 can only be from buffering axle sleeve 203
Gap oil return between piston 214, the purpose for reach slow, steadily falling after rise.
Above-described is only a kind of embodiment of the present utility model.It should be pointed out that the ordinary skill for this area
For personnel, on the premise of the utility model principle is not departed from, some variations and modifications can also be made, such as change side oil
Hole and the position of passage etc., these also should be regarded as belonging to the scope of protection of the utility model.
Claims (3)
1. the fork truck lifting oil cylinder with New Buffering structure, including cylinder body, cylinder body lower end are fixed with cylinder bottom, have piston in cylinder body
Bar, piston-rod lower end are provided with piston；Cylinder bottom is provided with oilhole and centre bore, and oilhole communicates with centre bore, is provided with centre bore slow
Axle sleeve is rushed, buffering axle sleeve one end is stretched into the central through hole of piston, there is gap between piston inner wall, it is characterised in that：Cylinder
Elongated hole and side oilhole are additionally provided with bottom, elongated hole connects side oilhole with oilhole, and the first check valve, side oil are provided with elongated hole
Hole extends through the upper end of cylinder bottom.
2. the fork truck lifting oil cylinder according to claim 1 with New Buffering structure, it is characterised in that：Piston is opened
There is counterbore, piston upper end is provided with passage, and passage communicates with counterbore and rod chamber, and the second check valve is provided with counterbore.
3. the fork truck lifting oil cylinder according to claim 1 or 2 with New Buffering structure, it is characterised in that：Piston with
There is Glais ring sealing between inboard wall of cylinder block, there is support ring to coordinate with cylinder body on the outer peripheral face of piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720514968.5U CN206886622U (en) | 2017-05-10 | 2017-05-10 | Fork truck lifting oil cylinder with New Buffering structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720514968.5U CN206886622U (en) | 2017-05-10 | 2017-05-10 | Fork truck lifting oil cylinder with New Buffering structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206886622U true CN206886622U (en) | 2018-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720514968.5U Active CN206886622U (en) | 2017-05-10 | 2017-05-10 | Fork truck lifting oil cylinder with New Buffering structure |
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| Country | Link |
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| CN (1) | CN206886622U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106946192A (en) * | 2017-05-10 | 2017-07-14 | 蚌埠液力机械有限公司 | Fork truck lifting oil cylinder with New Buffering structure |
-
2017
- 2017-05-10 CN CN201720514968.5U patent/CN206886622U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106946192A (en) * | 2017-05-10 | 2017-07-14 | 蚌埠液力机械有限公司 | Fork truck lifting oil cylinder with New Buffering structure |
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