CN204213095U - Oil cylinder - Google Patents

Oil cylinder Download PDF

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Publication number
CN204213095U
CN204213095U CN201420631993.8U CN201420631993U CN204213095U CN 204213095 U CN204213095 U CN 204213095U CN 201420631993 U CN201420631993 U CN 201420631993U CN 204213095 U CN204213095 U CN 204213095U
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China
Prior art keywords
oil
guiding hole
oil guiding
cylinder
cylinder bar
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Application number
CN201420631993.8U
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Chinese (zh)
Inventor
张丽娜
陈林
徐海东
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Beiqi Foton Motor Co Ltd
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Beiqi Foton Motor Co Ltd
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Abstract

The utility model provides a kind of oil cylinder, comprise cylinder body, piston and cylinder bar, piston has the first oil guiding hole of the through setting of axis along piston, the inwall of piston and cylinder body is slidably connected, cylinder body is divided into rod chamber and rodless cavity by piston, piston is arranged on the first end of cylinder bar, cylinder bar is positioned at rod chamber, cylinder bar has the second oil guiding hole, the outer surface of described cylinder bar comprises first portion's outer surface, the first end of the second oil guiding hole is communicated with the first oil guiding hole, second end through first portion outer surface of the second oil guiding hole, the hole wall of the second oil guiding hole forms the first oil transportation path, cylinder bar has the first limit position, when cylinder bar is in the first limit position, the volume of rodless cavity is down to minimum volume, first portion's outer surface of cylinder bar is still in the outside of cylinder body.Oil cylinder in the utility model has the advantages that structure is simple, manufacture difficulty is little.

Description

Oil cylinder
Technical field
The utility model relates to technical field of hydraulic equipment, more specifically, relates to a kind of oil cylinder.
Background technique
Be illustrated in figure 1 the structural representation of oil cylinder of the prior art.
Oil cylinder of the prior art comprises cylinder body 10 ', piston 20 ', cylinder bar 30 ', first oil pipe 40 ' and the second oil pipe 50 ', and wherein the first oil pipe 40 ' and the second oil pipe 50 ' extend rod chamber 11 ' and the rodless cavity 12 ' of cylinder body 10 ' respectively from the club head portion of cylinder bar 30 '.
During use, the club head portion of cylinder bar 30 ' is fixedly installed.
When the hydraulic oil carrying out self-pumping enters in rodless cavity 12 ' from the second oil pipe 50 ', hydraulic oil promotes cylinder body 10 ' and stretches out, and now, the hydraulic oil in cylinder body 10 ' in rod chamber 11 ' flows back to fuel tank by the first oil pipe 40 '.
When the hydraulic oil carrying out self-pumping enters in rod chamber 11 ' from the first oil pipe 40 ', hydraulic oil promotes cylinder body 10 ' and retracts, and now, the hydraulic oil in cylinder body 10 ' in rodless cavity 12 ' flows back to fuel tank by the second oil pipe 50 '.Because rodless cavity 12 ' cross-section area is large, flow is also large, and oil pipe 50 ' area of passage deficiency will cause flow system flow to lose and heating.
Oil cylinder of the prior art has two oil pipes, thus there is the problems such as complex structure, difficulty of processing are large, the easy seal failure of line connection.
Model utility content
The utility model aims to provide a kind of oil cylinder, to solve the problem that cylinder structure is complicated, difficulty of processing is large of prior art.
For solving the problems of the technologies described above, the utility model provides a kind of oil cylinder, comprise cylinder body, piston and cylinder bar, piston has the first oil guiding hole of the through setting of axis along piston, the inwall of piston and cylinder body is slidably connected, cylinder body is divided into rod chamber and rodless cavity by piston, piston is arranged on the first end of cylinder bar, cylinder bar is positioned at rod chamber, cylinder bar has the second oil guiding hole, the outer surface of cylinder bar comprises first portion's outer surface, the first end of the second oil guiding hole is communicated with the first oil guiding hole, second end through first portion outer surface of the second oil guiding hole, the hole wall of the second oil guiding hole forms the first oil transportation path, cylinder bar has the first limit position, when cylinder bar is in the first limit position, the volume of rodless cavity is down to minimum volume, first portion's outer surface of cylinder bar is still in the outside of cylinder body.
Further, the second end of the second oil guiding hole is communicated with the peripheral surface of first portion's outer surface of cylinder bar.
Further, the first end of the second oil guiding hole is to bearing of trend linearly shape, bending shape or the arc line shaped of the second end of the second oil guiding hole.
Further, the second oil guiding hole is arranged on cylinder bar along the axis of cylinder bar is through.
Further, the aperture of the first oil guiding hole is equal with the aperture of the second oil guiding hole.
Further, cylinder bar also has the second limit position, and the outer surface of cylinder bar also comprises second portion outer surface, and when cylinder bar is in the second limit position, the volume of rodless cavity rises to maximum volume, and the second portion outer surface of cylinder bar is still in the inner side of cylinder body; Cylinder bar also has for the 3rd oil guiding hole for the hydraulic oil turnover in rod chamber 11, and the 3rd oil guiding hole is communicated with rod chamber, first portion's outer surface of the through cylinder bar of the second end of the 3rd oil guiding hole.
Further, the 3rd oil guiding hole and the second oil guiding hole are isolated, and the second portion outer surface of the through cylinder bar of first end of the 3rd oil guiding hole, the hole wall of the 3rd oil guiding hole forms the second oil transportation path.
Further, oil cylinder also comprises oil pipe, oil pipe stretch in the second oil guiding hole at least partially, the second end of the 3rd oil guiding hole is communicated with the first end of the oil pipe being positioned at the second oil guiding hole.
Further, cylinder bar also comprises the 4th oil guiding hole, first portion's outer surface of the through cylinder body of first end of the 4th oil guiding hole, and the second end of the 4th oil guiding hole is communicated with the second end of the oil pipe being positioned at the second oil guiding hole.
Further, the aperture of the 3rd oil guiding hole and the aperture ratio range of the second oil guiding hole be (0,0.5].
Piston in the utility model has the first oil guiding hole of the through setting of axis along piston, the inwall of piston and cylinder body is slidably connected, piston is arranged on the first end of cylinder bar, cylinder body is divided into rod chamber and rodless cavity by piston, cylinder bar is positioned at rod chamber, cylinder bar has the second oil guiding hole, the outer surface of cylinder bar comprises first portion's outer surface, the first end of the second oil guiding hole is communicated with the first oil guiding hole, second end through first portion outer surface of the second oil guiding hole, the hole wall of the second oil guiding hole forms the first oil transportation path, cylinder bar has the first limit position, when cylinder bar is in the first limit position, the volume of rodless cavity is down to minimum volume, first portion's outer surface of cylinder bar is still in the outside of cylinder body.Hole wall due to the second oil guiding hole in the utility model forms the first oil transportation path, thus without the need to increasing the function that oil transportation path can realize oil transportation again in oil cylinder, thus structure complexity and the manufacture difficulty of oil cylinder is effectively reduced, and fundamentally avoid the Leakage that oil pipe and cylinder bar joint may cause because of seal failure, thus improve operational safety and the working stability of oil cylinder.Meanwhile, the oil cylinder in the utility model also has the feature that processing cost is low, work efficiency is high.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 diagrammatically illustrates the structural representation of oil cylinder of the prior art; And
Fig. 2 diagrammatically illustrates the structural representation of the oil cylinder in the utility model.
Reference character in figure: 10, cylinder body; 11, rod chamber; 12, rodless cavity; 20, piston; 21, the first oil guiding hole; 30, cylinder bar; 31, the second oil guiding hole; 32, first portion's outer surface; 33, the 3rd oil guiding hole; 34, second portion outer surface; 35, the 4th oil guiding hole; 40, oil pipe; 10 ', cylinder body; 11 ', rod chamber; 12 ', rodless cavity; 20 ', piston; 30 ', cylinder bar; 40 ', first oil pipe; 50 ', second oil pipe.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
The utility model provides a kind of oil cylinder.As shown in Figure 2, oil cylinder comprises cylinder body 10, piston 20 and cylinder bar 30, and piston 20 has the first oil guiding hole 21 of the through setting of axis along piston 20, and piston 20 is slidably connected with the inwall of cylinder body 10, piston 20 is arranged on the first end of cylinder bar 30, cylinder body 10 is divided into rod chamber 11 and rodless cavity 12 by piston 20, cylinder bar 30 is positioned at rod chamber 11, cylinder bar 30 has the second oil guiding hole 31, the outer surface of cylinder bar 30 comprises first portion's outer surface 32, the first end of the second oil guiding hole 31 is communicated with the first oil guiding hole 21, second end through first portion outer surface 32 of the second oil guiding hole 31, the hole wall of the second oil guiding hole 31 forms the first oil transportation path, cylinder bar 30 has the first limit position, when cylinder bar 30 is in the first limit position, the volume of rodless cavity 12 is down to minimum volume, first portion's outer surface 32 of cylinder bar 30 is still in the outside of cylinder body 10.Because the hole wall of the second oil guiding hole 31 in the utility model forms the first oil transportation path, thus without the need to increasing the function that new oil pipe can realize oil transportation again in oil cylinder, thus structure complexity and the manufacture difficulty of oil cylinder is effectively reduced, and fundamentally avoid the Leakage that new oil pipe and cylinder bar 30 joint may cause because of seal failure, thus improve operational safety and the working stability of oil cylinder.Meanwhile, the oil cylinder in the utility model also has the feature that processing cost is low, work efficiency is high.
Certainly, the cylinder bar 30 demand fulfillment related process standard using the second oil guiding hole 31 as the first oil transportation path.Such as, the standard of the turbidity test of the second oil guiding hole 31 is needed to the requirement of the turbidity test reached about transport pipe.
In preferred implementation as shown in Figure 2, the second oil guiding hole 31 is arranged on cylinder bar 30 along the axis of cylinder bar 30 is through.Because the second oil guiding hole 31 is arranged on cylinder bar 30 along the axis of cylinder bar 30 is through, thus not only ensure that running of hydraulic power oil is more smooth and easy, also effectively reduce processed complex degree, thus ensure that work efficiency and the operational safety of oil cylinder.
In a not shown preferred implementation, the second end of the second oil guiding hole 31 is communicated with the peripheral surface of first portion's outer surface 32 of cylinder bar 30.Because the peripheral surface of the second end of the second oil guiding hole 31 with first portion's outer surface 32 of cylinder bar 30 is communicated with, thus hydraulic oil realizes being communicated with of rodless cavity 12 and extraneous oil circuit by the second oil guiding hole 31, thus ensure that the functional reliability of oil cylinder.
Preferably, the first end of the second oil guiding hole 31 is to bearing of trend linearly shape, bending shape or the arc line shaped of the second end of the second oil guiding hole 31.Certainly, the second oil guiding hole 31 that linearly shape is arranged can effectively reduce running of hydraulic power oil resistance compared with the second oil guiding hole 31 of bending shape, thus ensures that running of hydraulic power oil is more smooth and easy.
In a specific embodiment, the first end of the second oil guiding hole 31 is L-shaped to the bearing of trend of the second end of the second oil guiding hole 31.
Preferably, the aperture of the first oil guiding hole 21 is equal with the aperture of the second oil guiding hole 31.Because the aperture of the first oil guiding hole 21 is equal with the aperture of the second oil guiding hole 31, thus effectively prevent hydraulic oil by during the two joint because of the inconsistent issuable resistance of pore size, ensure that running of hydraulic power oil is more smooth and easy, thus improve the operational safety of oil cylinder.
Cylinder bar 30 in the utility model also has the second limit position, the outer surface of cylinder bar also comprises second portion outer surface, when cylinder bar 30 is in the second limit position, the volume of rodless cavity 12 rises to maximum volume, and the second portion outer surface 34 of cylinder bar 30 is still in the inner side of cylinder body 10; Cylinder bar 30 also has for being communicated with rod chamber 11 for the 3rd oil guiding hole the 33, three oil guiding hole 33 of the hydraulic oil turnover in rod chamber 11, and the second portion outer surface 34 of the through cylinder bar 30 of the first end of the 3rd oil guiding hole 33.Because the 3rd oil guiding hole 33 is communicated with rod chamber 11, hydraulic oil thus can be made to realize being communicated with of rod chamber 11 and extraneous oil circuit by the 3rd oil guiding hole 33, thus ensure that the oil transportation reliability of oil cylinder.
Preferably, the aperture of the 3rd oil guiding hole 33 and the aperture ratio range of the second oil guiding hole 31 be (0,0.5].Suppose, the flow of rod chamber 11 is Q1, and the flow of rodless cavity 12 is Q2, and the internal diameter of cylinder body 10 is D, and the external diameter of cylinder bar 30 is d, then according to formula (1) Q=vs and formula (2) Q2/Q1=D 2/ (D 2-d 2), can determine that the flow of the flow-rate ratio rod chamber 11 of rodless cavity 12 is large, thus the oil return flow of rodless cavity 12 is more than twices of the oil inlet quantity of rod chamber 11 in practice.Thus, the diameter of the second oil guiding hole 31 also should can also ensure greatly the conveying reliability of hydraulic oil than the diameter of the 3rd oil guiding hole 33.Due to, the aperture of the 3rd oil guiding hole 33 and the aperture ratio range of the second oil guiding hole 31 are (0,0.5], thus effectively reduce the flow velocity of the interior hydraulic oil of the second oil guiding hole 31, avoid cause because of friction energy loss, reduce return oil pressure power, slow down the aging speed of the component such as Sealing, improve system effectiveness.Owing to increasing the aperture of the second oil guiding hole 31 and the first oil guiding hole 21, namely add the cross-section area of the oil circuit be communicated with rodless cavity 12, thus effectively improve the oil return ability of rodless cavity 12.
In preferred implementation as shown in Figure 2, oil cylinder also comprises oil pipe 40, oil pipe 40 stretch in the second oil guiding hole 31 at least partially, the second end of the 3rd oil guiding hole 33 is communicated with the first end of the oil pipe 40 being positioned at the second oil guiding hole 31.Owing to being provided with oil pipe 40, thus the 3rd oil guiding hole 33 and the second oil guiding hole 31 effectively being isolated, ensure that the reliability of oil transportation.
In above-mentioned preferred implementation, cylinder bar 30 also comprises the 4th oil guiding hole 35, second end of first portion's outer surface the 32, four oil guiding hole 35 of the through cylinder body 10 of first end of the 4th oil guiding hole 35 is communicated with the second end of the oil pipe 40 being positioned at the second oil guiding hole 31.Owing to being communicated with rod chamber 11 by the 4th oil guiding hole 35, oil pipe 40, the 3rd oil guiding hole 33, thus making oil transportation path and return line effectively isolate, thus ensure that the functional reliability of oil cylinder.
The working principle of oil cylinder in preferred implementation as shown in Figure 2: when the hydraulic oil carrying out self-pumping enters in rodless cavity 12 from the second oil guiding hole 31, first oil guiding hole 21, hydraulic oil promotes cylinder body 10 and stretches out, now, the hydraulic oil in cylinder body 10 in rod chamber 11 is by flowing back to fuel tank after the 3rd oil guiding hole 33, oil pipe 40, the 4th oil guiding hole 35; When the hydraulic oil carrying out self-pumping enters in rod chamber 11 after the 4th oil guiding hole 35, oil pipe 40, the 3rd oil guiding hole 33, hydraulic oil promotes cylinder body 10 and retracts, now, the hydraulic oil in cylinder body 10 in rodless cavity 12 flows back to fuel tank by the first oil guiding hole 21, second oil guiding hole 31.
Preferably, the peripheral side of first portion's outer surface 32 of the through cylinder body 10 of the first end of the 4th oil guiding hole 35.Certainly, the end face of first portion's outer surface 32 of the through cylinder body 10 of the first end of the 4th oil guiding hole 35.
Certainly, the second end of oil pipe 40 directly can also be stretched out by the second end of the second oil guiding hole 31.
Preferably, the equal diameters of the 3rd oil guiding hole 33 and oil pipe 40.Due to the 3rd oil guiding hole 33 and the equal diameters of oil pipe 40, thus ensure that running of hydraulic power oil is smooth and easy, thus improve the working stability of oil cylinder.
In a not shown preferred implementation, the 3rd oil guiding hole 33 and the second oil guiding hole 31 are isolated, and the hole wall of first portion's outer surface the 32, three oil guiding hole 33 of the through cylinder bar 30 of the second end of the 3rd oil guiding hole 33 forms the second oil transportation path.Because the hole wall of the 3rd oil guiding hole 33 in the utility model forms the second oil transportation path, thus without the need to increasing the function that new oil pipe can realize oil transportation again in oil cylinder, thus structure complexity and the manufacture difficulty of oil cylinder is effectively reduced, and fundamentally avoid the Leakage that new oil pipe and cylinder bar 30 joint may cause because of seal failure, thus improve operational safety and the working stability of oil cylinder.
Preferably, the first end of the 3rd oil guiding hole 33 is to bearing of trend linearly shape, bending shape or the arc line shaped of the second end of the 3rd oil guiding hole 33.
Oil cylinder in the utility model has that structure is simple, low cost of manufacture, feature that rodless cavity 12 oil return ability is strong.
Oil cylinder in the utility model also has the little feature of volume, is specially adapted to as truck crane cross cylinder.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims (10)

1. an oil cylinder, it is characterized in that, comprise cylinder body (10), piston (20) and cylinder bar (30), described piston (20) has first oil guiding hole (21) of the through setting of axis along described piston (20), described piston (20) is slidably connected with the inwall of described cylinder body (10), described cylinder body (10) is divided into rod chamber (11) and rodless cavity (12) by described piston (20), described piston (20) is arranged on the first end of described cylinder bar (30), described cylinder bar (30) is positioned at described rod chamber (11), described cylinder bar (30) has the second oil guiding hole (31), the outer surface of described cylinder bar (30) comprises first portion's outer surface (32), the first end of described second oil guiding hole (31) is communicated with described first oil guiding hole (21), second end through described first portion outer surface (32) of described second oil guiding hole (31), the hole wall of described second oil guiding hole (31) forms the first oil transportation path, described cylinder bar (30) has the first limit position, when described cylinder bar (30) is in described first limit position, the volume of described rodless cavity (12) is down to minimum volume, described first portion outer surface (32) of described cylinder bar (30) is still in the outside of described cylinder body (10).
2. oil cylinder according to claim 1, is characterized in that, the second end of described second oil guiding hole (31) is communicated with the peripheral surface of described first portion outer surface (32) of described cylinder bar (30).
3. oil cylinder according to claim 2, is characterized in that, the first end of described second oil guiding hole (31) is to bearing of trend linearly shape, bending shape or the arc line shaped of the second end of described second oil guiding hole (31).
4. oil cylinder according to claim 1, is characterized in that, described second oil guiding hole (31) is arranged on described cylinder bar (30) along the axis of described cylinder bar (30) is through.
5. oil cylinder according to claim 1, is characterized in that, the aperture of described first oil guiding hole (21) is equal with the aperture of described second oil guiding hole (31).
6. oil cylinder according to claim 1, is characterized in that,
Described cylinder bar (30) also has the second limit position, the outer surface of described cylinder bar (30) also comprises second portion outer surface (34), when described cylinder bar (30) is in described second limit position, the volume of described rodless cavity (12) rises to maximum volume, and the described second portion outer surface (34) of described cylinder bar (30) is still in the inner side of described cylinder body (10);
Described cylinder bar (30) also has for the 3rd oil guiding hole (33) for the hydraulic oil turnover in described rod chamber (11), described 3rd oil guiding hole (33) is communicated with described rod chamber (11), and the described second portion outer surface (34) of the through described cylinder bar (30) of the first end of described 3rd oil guiding hole (33).
7. oil cylinder according to claim 6, it is characterized in that, described 3rd oil guiding hole (33) and described second oil guiding hole (31) are isolated, described first portion outer surface (32) of the through described cylinder bar (30) of the second end of described 3rd oil guiding hole (33), the hole wall of described 3rd oil guiding hole (33) forms the second oil transportation path.
8. oil cylinder according to claim 6, it is characterized in that, described oil cylinder also comprises oil pipe (40), described oil pipe (40) stretch in described second oil guiding hole (31) at least partially, the second end of described 3rd oil guiding hole (33) is communicated with the first end of the described oil pipe (40) being positioned at described second oil guiding hole (31).
9. oil cylinder according to claim 8, it is characterized in that, described cylinder bar (30) also comprises the 4th oil guiding hole (35), described first portion outer surface (32) of the through described cylinder body (10) of first end of described 4th oil guiding hole (35), the second end of described 4th oil guiding hole (35) is communicated with the second end of the described oil pipe (40) being positioned at described second oil guiding hole (31).
10. oil cylinder according to claim 6, is characterized in that, the described aperture of the 3rd oil guiding hole (33) and the aperture ratio range of described second oil guiding hole (31) be (0,0.5].
CN201420631993.8U 2014-10-28 2014-10-28 Oil cylinder Active CN204213095U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420631993.8U CN204213095U (en) 2014-10-28 2014-10-28 Oil cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420631993.8U CN204213095U (en) 2014-10-28 2014-10-28 Oil cylinder

Publications (1)

Publication Number Publication Date
CN204213095U true CN204213095U (en) 2015-03-18

Family

ID=52981770

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420631993.8U Active CN204213095U (en) 2014-10-28 2014-10-28 Oil cylinder

Country Status (1)

Country Link
CN (1) CN204213095U (en)

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