CN205977871U - Steering cylinder for fork truck with unbalance loading limit function - Google Patents
Steering cylinder for fork truck with unbalance loading limit function Download PDFInfo
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- CN205977871U CN205977871U CN201620803499.4U CN201620803499U CN205977871U CN 205977871 U CN205977871 U CN 205977871U CN 201620803499 U CN201620803499 U CN 201620803499U CN 205977871 U CN205977871 U CN 205977871U
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Abstract
The utility model discloses a steering cylinder for fork truck with unbalance loading limit function, it be increasing on the steering cylinder for the fork truck of original no unbalance loading limit function be used for the spacing piston support ring of unbalance loading, appear greatly when turning round the phenomenon partially in the motion process when the piston rod, limiting displacement through the piston support ring has reduced 80% the piston seal and the inclined to one side mill of dust ring, has effectively stoped the piston rod area oil phenomenon because of piston seal and dust ring lost efficacy and result in. The utility model discloses be adjusted into 550mm by 300mm apart from the size between 2 hydro -cylinders installation lug boards on original no unbalance loading limit function's steering cylinder's barrel outer wall for the fork truck, reduce by 85% hydro -cylinder cylinder body and receive the deflection under the unbalance loading effect.
Description
Technical field
This utility model belongs to fork truck design field, and it is related to a kind of fork truck with unbalance loading limit function and turns to
Oil cylinder.
Background technology
Four pivot counterweight motor-driven formula steering axle for forklifts are typically transverse hydro-cylinder steeraxle, and steering cylinder is laterally disposed, lead to
Cross piston rod to move horizontally, drive the connecting rod being connected with piston rod and knuckle arm motion, due to knuckle arm and knuckle body
Weld together, rotate around stub, steered wheel is coupled with knuckle body by wheel hub, therefore finally makes two steered wheels with oil
The piston rod stroke of cylinder changes and swings, and realizes the steering of fork truck.
Referring to Fig. 3, Fig. 4, during the work of existing steering cylinder, in piston rod 1 moving process, because 1, piston rod is in fortune
All assume the state of twisting during dynamic, and existing steel-backed bearing 3 to there is Wall-Thickness Difference uncontrollable, make piston rod 1 and steel back axle
Hold 3 gap excessive, between piston rod 1 and steel-backed bearing 3, monolateral gap delta 1 is 0.2mm when maximum, and gap delta 1 is crossed conference and led to live
Stopper rod 1 produces eccentric wear phenomenon to cylinder end piston sealing ring 7 and dust ring 6, after causing plug piston packing 7 and dust ring 6 inefficacy
Piston rod 1 occurs and carries oily phenomenon.Find that oil cylinder piston packing 7 after 50,000 steering tests by bench simulation test
After inefficacy, piston rod 1 carries oil, and market also piston rod 1 using feedback at 3 months about and carries oily phenomenon.
Utility model content
Main purpose of the present utility model is for the problems referred to above, there is provided a kind of fork truck with unbalance loading limit function
Use steering cylinder.
A kind of steering oil cylinder for forklift with unbalance loading limit function, close including piston rod 1, cylinder head 2, cylinder barrel 4, combination
Seal 5 and piston 10, the structure of described piston rod 1 is thin ends and thick middle Step Shaft, cylindrical at the two ends of described Step Shaft
Upper be milled with flat respectively, and in its flat, the radial direction along axle is respectively provided with a pivot pin through hole, in the axial direction of described piston rod 1
Center portion position is connected to the piston 10 of concentric cylinder tubulose, is provided with annular boss, described on the middle part of described piston 10 is cylindrical
The centre of annular boss has annular groove and installs combined seal ring 5 on its annular groove, and the structure of described cylinder barrel 4 is one section of inwall
Through the round steel pipe of honing, respectively it is provided with one section of closely-pitched female thread at its two ends bore orifice, in the cylinder body outer wall of cylinder barrel 4
Upper and both sides end face is equidistant is provided with 2 radial direction through hole, and this two radial direction through hole are respectively placed in the fine thread at described two ends
Ending at, the outside of the cylinder barrel 4 at its radial direction through hole sets an inlet connector respectively, in the cylinder body outer wall of cylinder barrel 4
On be additionally provided with 2 oil cylinders lug plates be installed, the structure of described cylinder head 2 is one section of cylindrical cylindrical tubular body with 3 grades of step circles,
Its cylindrical maximum cylindrical face of cylinder of one-level along the circumferential direction has 6 for dismounting the rectangular channels of cylinder head 2, in the middle one
The cylindrical face of cylinder of level is provided with fine thread, and this screw thread is matched with the female thread at cylinder barrel 4 two ends, cylindrical in its minimum one-level
2 annular grooves are had on the face of cylinder and is respectively used to cylinder head O-ring 8 and cylinder head support ring 9 are installed, outer in described cylindrical tubular body
The inner hole wall of circle maximum one-level cylindrical face of cylinder side is provided with 2 road annular grooves and is respectively used to install dust ring 6 and piston packing
7, the high accuracy reaming with seam is provided with its opposite side inner hole wall and is used for steel-backed bearing 3 is installed, during use, piston will be contained
10 and the assembly of piston rod 1 put in cylinder barrel 4, now at the two ends of cylinder barrel 4, precession contains steel-backed bearing 3, dust ring respectively
6th, cylinder head 2 assembly of piston packing 7, cylinder head O-ring 8 and cylinder head support ring 9, forms complete piston middle double acting oil
Cylinder；The unilateral stroke of piston 10 is 128mm.
On the premise of not changing piston 10 stroke：
The axial length L of described piston 10 is equal to or more than the stroke of piston 10；
The axial length L 3 of the annular boss on piston 10 is less than 1/2nd of the axial length L of piston 10；Described group
Respectively have one support annular groove on the annular boss of both sides closing sealing ring 5, and be provided with support ring 11 in support annular groove；Described
The groove width of pushing out ring groove is more than the groove width of seal groove；Under normal temperature state, the cylindrical and cylinder barrel 4 of the support ring 11 on piston 10
Monolateral gap delta 2 between inner hole wall is 0.05～0.1mm.
The technical conditions limiting further are as follows：
The axial length of described cylinder barrel 4 is 650～680mm, and the axial length L of described piston 10 is 130～150mm,
The axial length L 3 of piston 10 upper annular boss is 60～70mm, and groove width d of described support annular groove is 15～20mm, described close
The groove width of sealing groove is 8mm, supports the axial spacing X between annular groove and seal groove to be 5～8mm.
The material of described support ring 11 is politef, and it is assemblied on piston 10 using hot charge practice；Under normal temperature state,
Monolateral gap delta 2 between cylindrical and cylinder barrel 4 inner hole wall of the support ring 11 on piston 10 is 0.06～0.08mm.
The pivot pin through hole centre-to-centre spacing at the two ends of described piston rod 1 and the fork truck steering oil of original no unbalance loading limit function
The pivot pin through hole centre-to-centre spacing of cylinder is consistent.
The distance between lug plate size L1=550mm installed by 2 oil cylinders on the cylinder body outer wall of described cylinder barrel 4.
Advantageous Effects of the present utility model are：
（1）This utility model increased for unbalance loading limit on the steering oil cylinder for forklift of original no unbalance loading limit function
The piston support ring of position, when piston rod larger partial twist phenomenon in motor process, by the spacing work of piston support ring
With reducing 80% piston packing and the eccentric wear of dust ring, effectively prevent and lost efficacy and led because of piston packing and dust ring
The piston rod band oil phenomenon causing.
（2）On the cylinder body outer wall of the steering oil cylinder for forklift in original no unbalance loading limit function for this utility model 2
Oil cylinder is installed the distance between lug plate size and is adjusted to 550mm by 300mm, and the oil cylinder cylinder reducing by 85% is subject to uneven loading action
Under deflection.
Brief description
Fig. 1 is this utility model organigram；
Fig. 2 is Figure 1B portion partial schematic diagram；
Fig. 3 is Figure 1A portion partial schematic diagram；
Fig. 4 is the steering oil cylinder for forklift organigram of no unbalance loading limit function.
In figure：1- piston rod, 2- cylinder head, 3- steel-backed bearing, 4- cylinder barrel, 5- combined seal ring, 6- dust ring, 7- piston
Sealing ring, 8- cylinder head O-ring, 9- cylinder head support ring, 10- piston, 11- support ring.
Specific embodiment
Below in conjunction with the accompanying drawings, by embodiment, the utility model is described in further detail.
Embodiment
Referring to Fig. 1, Fig. 2, Fig. 3, a kind of steering oil cylinder for forklift with unbalance loading limit function, including piston rod 1, cylinder head
2nd, cylinder barrel 4, combined seal ring 5 and piston 10, the structure of described piston rod 1 is thin ends and thick middle Step Shaft, described
The two ends of Step Shaft cylindrical upper be milled with flat respectively, and in its flat, the radial direction along axle is respectively provided with a pivot pin through hole, in institute
The longitudinal central portion stating piston rod 1 is connected to the piston 10 of concentric cylinder tubulose, sets on the middle part of described piston 10 is cylindrical
There is annular boss, have annular groove in the centre of described annular boss and combined seal ring 5, described cylinder barrel are installed on its annular groove
4 structure is the round steel pipe through honing for one section of inwall, is respectively provided with one section of closely-pitched female thread at its two ends bore orifice,
Equidistant with both sides end face on the cylinder body outer wall of cylinder barrel 4 be provided with 2 radial direction through hole, and this two radial direction through hole are respectively placed in institute
At the ending of the fine thread stating two ends, the outside of the cylinder barrel 4 at its radial direction through hole sets an inlet connector, respectively in cylinder
2 oil cylinders are additionally provided with the cylinder body outer wall of cylinder 4 lug plates are installed, the structure of described cylinder head 2 is one section and cylindrical has 3 grades of steps
The cylindrical tubular body of circle, along the circumferential direction has 6 squares for dismounting cylinder head 2 on its cylindrical maximum cylindrical face of cylinder of one-level
Shape groove, in the middle the cylindrical face of cylinder of one-level be provided with fine thread, this screw thread is matched with the female thread at cylinder barrel 4 two ends,
2 annular grooves are had on the cylindrical face of cylinder of its minimum one-level and is respectively used to cylinder head O-ring 8 and cylinder head support ring 9 are installed, in institute
State the cylindrical maximum one-level cylindrical face of cylinder side of cylindrical tubular body inner hole wall be provided with 2 road annular grooves be respectively used to install dust-proof
Circle 6 and piston packing 7, are provided with the high accuracy reaming with seam on its opposite side inner hole wall and are used for installing steel-backed bearing 3, make
Used time, the assembly containing piston 10 and piston rod 1 is put in cylinder barrel 4, now in the two ends of cylinder barrel 4 precession steely respectively
Back of the body bearing 3, dust ring 6, cylinder head 2 assembly of piston packing 7, cylinder head O-ring 8 and cylinder head support ring 9, form complete piston
Middle two-way cylinder；The unilateral stroke of piston 10 is 128mm.
On the premise of not changing piston 10 stroke：
The axial length L of described piston 10 is equal to or more than the stroke of piston 10；
The axial length L 3 of the annular boss on piston 10 is less than 1/2nd of the axial length L of piston 10；Described group
Respectively have one support annular groove on the annular boss of both sides closing sealing ring 5, and be provided with support ring 11 in support annular groove；Described
The groove width of pushing out ring groove is more than the groove width of seal groove.
The material of described support ring 11 is politef, and it is assemblied on piston 10 using hot charge practice, under normal temperature state,
Monolateral gap delta 2=0.07mm between cylindrical and cylinder barrel 4 endoporus of the support ring 11 on piston 10.When piston rod 1 exists
80% piston packing 7 when larger partial twist phenomenon occurs in motor process, is reduced by the position-limiting action of piston support ring 11
And the eccentric wear of dust ring 6, effectively prevent the piston rod 1 losing efficacy and leading to because of piston packing 7 and dust ring 6 to carry oily phenomenon.
The axial length of described cylinder barrel 4 is 675mm, and the axial length L of described piston 10 is 145mm, ring on piston 10
The axial length L 3 of shape boss is 60mm, and groove width d of described support annular groove is 18mm, and the groove width of described seal groove is 8mm,
Axial spacing X between pushing out ring groove and seal groove is 5mm.
The pivot pin through hole centre-to-centre spacing at the two ends of described piston rod 1 and the fork truck steering oil of original no unbalance loading limit function
The pivot pin through hole centre-to-centre spacing of cylinder is consistent, and therefore, this utility model can substitute the fork truck of original no unbalance loading limit function
Use steering cylinder.
Referring to Fig. 1, Fig. 4, the distance between lug plate size installed by 2 oil cylinders on the cylinder body outer wall of described cylinder barrel 4
L1=550mm, lug installed by 2 oil cylinders on the steering oil cylinder for forklift cylinder barrel outer wall of more original no unbalance loading limit function
The distance between plate size L2=300mm increased 250mm, and the oil cylinder cylinder reducing by 85% is subject to the deflection under uneven loading action.
Seal fails 200,000 times by bench test in this utility model, enters according to increase by 10% load simultaneously again
After 100,000 tests of row, seal fails do not occur, now open and inspect oil cylinder and find that each sealing member is intact, each part of oil cylinder is intact.Little
Batch put on market using not having feedback piston cylinder band oil and seal fails problem after following the tracks of 1 year.
Above content not makees any pro forma restriction to structure of the present utility model, shape.Every according to this practicality
Any simple modification, equivalent variations and modification that new technical spirit is made to above example, all still fall within this practicality new
In the range of type technical scheme.
Claims (5)
1. a kind of steering oil cylinder for forklift with unbalance loading limit function, including piston rod（1）, cylinder head（2）, cylinder barrel（4）, group
Close sealing ring（5）And piston（10）, described piston rod（1）Structure be thin ends and thick middle Step Shaft, in described Step Shaft
Two ends cylindrical upper be milled with flat respectively, and in its flat, the radial direction along axle is respectively provided with a pivot pin through hole, in described piston
Bar（1）Longitudinal central portion be connected to the piston of concentric cylinder tubulose（10）, in described piston（10）Middle part cylindrical on set
There is annular boss, have annular groove in the centre of described annular boss and combined seal ring is installed on its annular groove（5）, described cylinder barrel
Body（4）Structure be the round steel pipe through honing for one section of inwall, be respectively provided with spiral shell in one section of closely-pitched at its two ends bore orifice
Stricture of vagina, in cylinder barrel（4）Cylinder body outer wall on equidistant with both sides end face be provided with 2 radial direction through hole, and this two radial direction through hole divide
Cylinder barrel at the ending of the fine thread not being placed in described two ends, at its radial direction through hole（4）Outside set an oil-feed respectively
Pipe joint, in cylinder barrel（4）Cylinder body outer wall on be additionally provided with 2 oil cylinders lug plates, described cylinder head be installed（2）Structure be one section
The cylindrical cylindrical tubular body with 3 grades of step circles, its cylindrical maximum the cylindrical face of cylinder of one-level on along the circumferential direction have 6 with
In dismounting cylinder head（2）Rectangular channel, in the middle the cylindrical face of cylinder of one-level be provided with fine thread, this screw thread and cylinder barrel（4）
The female thread at two ends matches, and has 2 annular grooves and be respectively used to install cylinder head O-ring on the cylindrical face of cylinder of its minimum one-level
（8）With cylinder head support ring（9）, the inner hole wall of the cylindrical maximum one-level cylindrical face of cylinder side of described cylindrical tubular body is provided with
2 road annular grooves are respectively used to install dust ring（6）And piston packing（7）, its opposite side inner hole wall is provided with the height with seam
Precision reaming is used for installing steel-backed bearing（3）, during use, piston will be contained（10）And piston rod（1）Assembly put cylinder barrel into
（4）In, now in cylinder barrel（4）Respectively precession contains steel-backed bearing at two ends（3）, dust ring（6）, piston packing（7）, cylinder head
O-ring（8）With cylinder head support ring（9）Cylinder head（2）Assembly, forms complete piston middle two-way cylinder；Piston（10）
Unilateral stroke be 128mm；
It is characterized in that：
Do not changing piston（10）On the premise of stroke：
Described piston（10）Axial length L be equal to or more than piston（10）Stroke；
Piston（10）On annular boss axial length L 3 be less than piston（10）Axial length L 1/2nd；Described group
Close sealing ring（5）The annular boss of both sides on respectively have one support annular groove, and support annular groove in be provided with support ring（11）；Institute
State the groove width supporting the groove width of annular groove to be more than seal groove；Under normal temperature state, positioned at piston（10）On support ring（11）Cylindrical
With cylinder barrel（4）Monolateral gap delta 2 between inner hole wall is 0.05～0.1mm.
2. a kind of steering oil cylinder for forklift with unbalance loading limit function according to claim 1 it is characterised in that：Described
Cylinder barrel（4）Axial length be 650～680mm, described piston（10）Axial length L be 130～150mm, piston（10）
The axial length L 3 of upper annular boss is 60～70mm, and groove width d of described support annular groove is 15～20mm, the groove of described seal groove
A width of 8mm, supports the axial spacing X between annular groove and seal groove to be 5～8mm.
3. a kind of steering oil cylinder for forklift with unbalance loading limit function according to claim 1 it is characterised in that：Described
Support ring（11）Material be politef, it is assemblied in piston using hot charge practice（10）On；Under normal temperature state, positioned at piston
（10）On support ring（11）Cylindrical and cylinder barrel（4）Monolateral gap delta 2 between inner hole wall is 0.06～0.08mm.
4. a kind of steering oil cylinder for forklift with unbalance loading limit function according to claim 1 it is characterised in that：Described
Piston rod（1）The pivot pin through hole centre-to-centre spacing at two ends and original no unbalance loading limit function steering oil cylinder for forklift pivot pin lead to
Hole centre-to-centre spacing is consistent.
5. a kind of steering oil cylinder for forklift with unbalance loading limit function according to claim 1 it is characterised in that：Described
Cylinder barrel（4）Cylinder body outer wall on 2 oil cylinders the distance between lug plates size L1=550mm is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620803499.4U CN205977871U (en) | 2016-07-28 | 2016-07-28 | Steering cylinder for fork truck with unbalance loading limit function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620803499.4U CN205977871U (en) | 2016-07-28 | 2016-07-28 | Steering cylinder for fork truck with unbalance loading limit function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205977871U true CN205977871U (en) | 2017-02-22 |
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ID=58027880
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620803499.4U Active CN205977871U (en) | 2016-07-28 | 2016-07-28 | Steering cylinder for fork truck with unbalance loading limit function |
Country Status (1)
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| CN (1) | CN205977871U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089844A (en) * | 2016-07-28 | 2016-11-09 | 安徽合力股份有限公司 | A kind of steering oil cylinder for forklift with unbalance loading limit function |
| CN109058222A (en) * | 2018-09-30 | 2018-12-21 | 合肥高益机电科技有限公司 | A kind of truck hydraulic piston cylinder |
-
2016
- 2016-07-28 CN CN201620803499.4U patent/CN205977871U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089844A (en) * | 2016-07-28 | 2016-11-09 | 安徽合力股份有限公司 | A kind of steering oil cylinder for forklift with unbalance loading limit function |
| CN109058222A (en) * | 2018-09-30 | 2018-12-21 | 合肥高益机电科技有限公司 | A kind of truck hydraulic piston cylinder |
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