CN203548405U - Oil cylinder without oil return port - Google Patents

Oil cylinder without oil return port Download PDF

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Publication number
CN203548405U
CN203548405U CN201320596099.7U CN201320596099U CN203548405U CN 203548405 U CN203548405 U CN 203548405U CN 201320596099 U CN201320596099 U CN 201320596099U CN 203548405 U CN203548405 U CN 203548405U
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CN
China
Prior art keywords
piston
piston rod
cylinder barrel
oil
hole
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.)
Active
Application number
CN201320596099.7U
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Chinese (zh)
Inventor
陶锋
胡军中
朱峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Haist Mei Kos forklift truck (Zhejiang) Co., Ltd.
Original Assignee
Zhejiang Maximal Forklift Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhejiang Maximal Forklift Co Ltd filed Critical Zhejiang Maximal Forklift Co Ltd
Priority to CN201320596099.7U priority Critical patent/CN203548405U/en
Application granted granted Critical
Publication of CN203548405U publication Critical patent/CN203548405U/en
Active legal-status Critical Current
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Abstract

The utility model relates to a forklift oil cylinder, and discloses an oil cylinder without an oil return port. The oil cylinder comprises a cylinder tube (1) and a piston rod (2), wherein the piston rod (2) is arranged in the cylinder tube (1), an oil cavity (5) is arranged between the cylinder tube (1) and the piston rod (2), a blind hole (21) is formed in the end part of the piston rod (2), and is communicated with the oil cavity (5) through an oil groove (8), a through hole (74) is formed in a piston (7), the piston (7) is arranged in the blind hole (21), and a sealing ring is arranged between the piston (7) and the blind hole (21). The oil cylinder has the advantage that by forming the blind hole in the piston rod, the matching part of the piston and the piston rod is processed with the oil groove, the center of the piston is processed with the through hole, and a one-way valve is arranged in the through hole, so the whole oil return process is completed, the arrangement of oil return pipes of the oil cylinder is eliminated, the integral appearance is improved, and the production cost of equipment is saved.

Description

A kind of without return opening oil cylinder
Technical field
The utility model relates to fork truck oil cylinder, has related in particular to a kind of without return opening oil cylinder.
Background technique
In prior art, after oil cylinder rises beyond the Great Wall, epicoele gas and oil impregnate are discharged from return opening, through left and right return tube, be pooled to main return tube, enter fuel tank.Such circuit has a lot of drawbacks: as the need return line of arranging, fixedly return tube, affects overall aesthetics, and cost of idleness affects working efficiency; On tank cover, need to add the cylinder return opening that hoists, increase cost.
Summary of the invention
The utility model is for the oil cylinder that has return opening in the prior art return line of need arranging, fixing return tube, and cost of production is high, and meanwhile, the pipeline of too various complexity, affects the overall aesthetics of equipment on the one hand, has also reduced on the other hand working efficiency; Simultaneously, above-mentioned oil cylinder need to add the cylinder return opening that hoists on tank cover, the shortcomings such as cost of production of increase equipment, provide a kind of and passed through at piston rod processing blind hole, piston and piston rod blind hole cooperation place processing oil groove, piston center processing through hole is also installed one-way valve, by said structure, complete whole oil return process, save arranging of oil cylinder return tube, improve overall aesthetics, cost-saving is a kind of without return opening oil cylinder.
In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals:
A kind of without return opening oil cylinder, comprise cylinder barrel and be arranged on the piston rod in cylinder barrel, between described cylinder barrel and piston rod, be provided with oil pocket, the end of piston rod is provided with blind hole, between blind hole and oil pocket, by oil groove, be communicated with, through hole is set in piston, and piston is arranged in blind hole, between piston and blind hole, seal ring is set.One end of piston is arranged in blind hole, and the other end contacts with the inwall of cylinder barrel.The left end of piston is arranged in blind hole, and the outer wall of piston contacts with the inwall of blind hole, between piston and blind hole, seal ring is set, and improves the seal of piston and blind hole.
As preferably, in the through hole of described piston, be provided with one-way valve.
Piston rises, and in oil pocket, air is emptying, and combination seal packing ring and bolt are installed on cylinder barrel, and in working procedure, oil pocket is in negative pressure.Oil cylinder works long hours or places, may there is oil impregnate in oil pocket, when promoting piston, rodless cavity oil-feed rises, oil pocket space dwindles, and chamber inner fluid, by the oil groove on piston, is pressed in the blind hole of piston rod, under circle heap shape one-way valve, mineralization pressure is poor, push one-way valve open, blind hole inner fluid is pressed into rodless cavity, realizes the oil return of oil pocket epicoele fluid.
As preferably, the described end cap that also comprises, end cap is provided with rodless cavity, and through hole is communicated with blind hole and rodless cavity.One end of one-way valve is blind hole, and the other end of one-way valve is rodless cavity.
As preferably, support ring and hole envelope and back-up ring for hole is set between described piston and cylinder barrel.
As preferably, between described cylinder barrel and piston rod, support ring is set.Support ring act as the support increasing between cylinder barrel and piston rod, prevent that cylinder barrel from producing moulding distortion after working long hours.
As preferably, also comprise axle sleeve, front end and the piston rod of axle sleeve are connected, and dust ring and shaft seal are set between axle sleeve and piston rod.Dust ring is arranged on the outer end that axle sleeve is connected with piston rod, and shaft seal is arranged on the inner side that axle sleeve is connected with piston rod, and dust ring and shaft seal interval arrange.Dust ring can effectively stop outside air, dust to enter, and shaft seal plays the effect of second protection, by duplicate protection is set, improves the airtight performance between piston rod and cylinder barrel, effectively stops outside air and dust and enters cylinder barrel.
Also comprise axle sleeve, the rear end of axle sleeve is connected with cylinder barrel, between axle sleeve and cylinder barrel, circular seal ring is set.The gap that circular seal ring can effectively stop outside air and dust to be connected with cylinder barrel by axle sleeve enters in cylinder barrel, and cylinder barrel is played a protective role.
As preferably, described cylinder barrel is provided with attachment hole, and attachment hole is communicated with oil pocket.
As preferably, in described attachment hole, bolt is set, between bolt and cylinder barrel, arrange seal washer.
As preferably, cutting ferrule and axle sleeve support ring are set between the cylinder barrel of described axle sleeve rear end and piston rod.Axle sleeve support ring contacts with cylinder barrel is inner, and the front end of axle sleeve support ring is provided with projection, and projection is connected between the end and axle sleeve of cylinder barrel, and cutting ferrule is arranged between axle sleeve support ring and piston rod, and cutting ferrule contacts with piston rod.Axle sleeve support ring is main act as the support increasing between cylinder barrel and piston rod, prevent that cylinder barrel from moulding distortion occurring, on the other hand, because cutting ferrule is closely connected with piston rod and cylinder barrel contact-type respectively with axle sleeve support ring, can further stop outside air and impurity to enter in cylinder barrel, improve the sealability of cylinder barrel.
The utility model is owing to having adopted above technological scheme, there is significant technique effect: the utility model passes through at piston rod processing blind hole, piston and piston rod blind hole cooperation place processing oil groove, piston center processing through hole is also installed one-way valve, by said structure, complete whole oil return process, save arranging of oil cylinder return tube, improve overall aesthetics, save the cost of production of equipment.
Accompanying drawing explanation
Fig. 1 is embodiment's 1 of the present utility model structural representation.
Fig. 2 is the structural drawing of the I portion in Fig. 1.
The toponym that in above accompanying drawing, each number designation refers to is as follows: wherein 1-cylinder barrel, 2-piston rod, 3-axle sleeve, 4-end cap, 5-oil pocket, 6-support ring, 7-piston, 8-oil groove, 9-bolt, 11-attachment hole, 21-blind hole, 31-dust ring, 32-shaft seal, 33-circular seal ring, 34-cutting ferrule, 35-axle sleeve support ring, 41-rodless cavity, 71-one-way valve, support ring, 73-hole envelope, 74-through hole for 72-hole
Embodiment
Below in conjunction with accompanying drawing 1 to Fig. 2 and embodiment, the utility model is described in further detail:
Embodiment 1
A kind of without return opening oil cylinder, as shown in Figure 1, comprise cylinder barrel 1 and be arranged on the piston rod 2 in cylinder barrel 1, between described cylinder barrel 1 and piston rod 2, be provided with oil pocket 5, the end of piston rod 2 is provided with blind hole 21, is communicated with the interior through hole 74 that arranges of piston 7 between blind hole 21 and oil pocket 5 by oil groove 8, piston 7 is arranged in blind hole 21, between piston 7 and blind hole 21, seal ring is set.The left end of piston is arranged in blind hole, and the outer wall of piston contacts with the inwall of blind hole, between piston and blind hole, seal ring is set, and improves the seal of piston and blind hole.
One end of piston 7 is arranged in blind hole 21, and the other end contacts with the inwall of cylinder barrel 1.In the through hole 74 of piston 7, be provided with one-way valve 71.On piston 7, leave oil groove 8, can make cylinder upper cavity oil 4 fluid flow in the blind hole 21 of piston rod 5, blind hole 21 is provided with circle heap shape one-way valve 71 with rodless cavity 41 places of communicating.
Piston 7 rises, and the interior air of oil pocket 5 is emptying, and combination seal packing ring and bolt 9 are installed on cylinder barrel 1, and in working procedure, oil pocket 5 is in negative pressure.Oil cylinder works long hours or places, may there is oil impregnate in oil pocket 5, when promoting piston 7, rodless cavity 41 oil-feeds rise, oil pocket 5 spaces dwindle, and chamber inner fluid, by the oil groove on piston 7, is pressed in the blind hole 21 of piston rod 2,71 times mineralization pressures of circle heap shape one-way valve are poor, push one-way valve 71 open, blind hole 21 inner fluids are pressed into rodless cavity 41, realize oil pocket 5 epicoele fluid oil returns.
Also comprise end cap 4, end cap 4 is provided with rodless cavity 41, and through hole 74 is communicated with blind hole 21 and rodless cavity 41.One end of one-way valve 71 is blind hole 21, and the other end of one-way valve 71 is rodless cavity 41.
Support ring 72 and hole envelope 73 and back-up ring for hole is set between piston 7 and cylinder barrel 1.
Between cylinder barrel 1 and piston rod 2, support ring 6 is set.Support ring 6 act as the support increasing between cylinder barrel 1 and piston rod 2, prevent that cylinder barrel 1 from producing moulding distortion after working long hours.
Also comprise axle sleeve 3, the front end of axle sleeve 3 and piston rod 2 are connected, and dust ring 31 and shaft seal 32 are set between axle sleeve 3 and piston rod 2.Dust ring 31 is arranged on the outer end that axle sleeve 3 is connected with piston rod 2, and shaft seal 32 is arranged on the inner side that axle sleeve 3 is connected with piston rod 2, and dust ring 31 arranges with shaft seal 32 intervals.Dust ring 31 can effectively stop outside air, dust to enter, and shaft seal 32 plays the effect of second protection, by duplicate protection is set, improves the airtight performance between piston rod 2 and cylinder barrel 1, effectively stops outside air and dust and enters cylinder barrel 1.The rear end of axle sleeve 3 is connected with cylinder barrel 1, between axle sleeve 3 and cylinder barrel 1, circular seal ring 33 is set.The gap that circular seal ring 33 can effectively stop outside air and dust to be connected with cylinder barrel 1 by axle sleeve 3 enters in cylinder barrel 1, and cylinder barrel 1 is played a protective role.Cylinder barrel 1 is provided with attachment hole 11, and attachment hole 11 is communicated with oil pocket 5.On cylinder barrel 1, without return opening, combination seal packing ring and interior hexagonal cylindrical hook bolt 9 are installed on cylinder barrel 1.The interior bolt 9 that arranges of attachment hole 11, arranges seal washer between bolt 9 and cylinder barrel 1.
Cutting ferrule 34 and axle sleeve support ring 35 are set between the cylinder barrel 1 of axle sleeve 3 rear ends and piston rod 2.Axle sleeve support ring 35 contacts with cylinder barrel 1 is inner, and the front end of axle sleeve support ring 35 is provided with projection, and projection is connected between the end and axle sleeve 3 of cylinder barrel 1, and cutting ferrule 34 is arranged between axle sleeve support ring 35 and piston rod 2, and cutting ferrule 34 contacts with piston rod 2.Axle sleeve support ring 35 is main act as the support increasing between cylinder barrel 1 and piston rod 2, prevent that cylinder barrel 1 from moulding distortion occurring, on the other hand, because cutting ferrule 34 is closely connected with piston rod 2 and cylinder barrel 1 contact-type respectively with axle sleeve support ring 35, can further stop outside air and impurity to enter in cylinder barrel, improve the sealability of cylinder barrel 1.
In a word, the foregoing is only preferred embodiment of the present utility model, all equalizations of doing according to the utility model claim change and modify, and all should belong to the covering scope of the utility model patent.

Claims (10)

1. one kind without return opening oil cylinder, comprise cylinder barrel (1) and be arranged on the piston rod (2) in cylinder barrel (1), it is characterized in that: between described cylinder barrel (1) and piston rod (2), be provided with oil pocket (5), the end of piston rod (2) is provided with blind hole (21), between blind hole (21) and oil pocket (5), by oil groove (8), be communicated with, through hole (74) is set in piston (7), and piston (7) is arranged in blind hole (21), between piston (7) and blind hole (21), seal ring is set.
2. according to claim 1 a kind of without return opening oil cylinder, it is characterized in that: in the through hole (74) of described piston (7), be provided with one-way valve (71).
3. according to claim 1 and 2 a kind of without return opening oil cylinder, it is characterized in that: also comprise end cap (4), end cap (4) is provided with rodless cavity (41), through hole (74) is communicated with blind hole (21) and rodless cavity (41).
4. according to claim 1 a kind of without return opening oil cylinder, it is characterized in that: support ring for hole (72) and hole envelope (73) and back-up ring are set between described piston (7) and cylinder barrel (1).
5. according to claim 1 a kind of without return opening oil cylinder, it is characterized in that: between described cylinder barrel (1) and piston rod (2), support ring (6) is set.
6. according to claim 1 a kind of without return opening oil cylinder, it is characterized in that: also comprise axle sleeve (3), the front end of axle sleeve (3) and piston rod (2) are connected, and dust ring (31) and shaft seal (32) are set between axle sleeve (3) and piston rod (2).
7. according to claim 1 a kind of without return opening oil cylinder, it is characterized in that: also comprise axle sleeve (3), the rear end of axle sleeve (3) is connected with cylinder barrel (1), between axle sleeve (3) and cylinder barrel (1), circular seal ring (33) is set.
8. according to claim 1 a kind of without return opening oil cylinder, it is characterized in that: described cylinder barrel (1) is provided with attachment hole (11), attachment hole (11) is communicated with oil pocket (5).
9. according to claim 8 a kind of without return opening oil cylinder, it is characterized in that: bolt (9) is set in described attachment hole (11), between bolt (9) and cylinder barrel (1), arranges seal washer.
10. according to claim 7 a kind of without return opening oil cylinder, it is characterized in that: cutting ferrule (34) and axle sleeve support ring (35) are set between the cylinder barrel (1) of described axle sleeve (3) rear end and piston rod (2).
CN201320596099.7U 2013-09-25 2013-09-25 Oil cylinder without oil return port Active CN203548405U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320596099.7U CN203548405U (en) 2013-09-25 2013-09-25 Oil cylinder without oil return port

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320596099.7U CN203548405U (en) 2013-09-25 2013-09-25 Oil cylinder without oil return port

Publications (1)

Publication Number Publication Date
CN203548405U true CN203548405U (en) 2014-04-16

Family

ID=50466529

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320596099.7U Active CN203548405U (en) 2013-09-25 2013-09-25 Oil cylinder without oil return port

Country Status (1)

Country Link
CN (1) CN203548405U (en)

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C14 Grant of patent or utility model
GR01 Patent grant
CP03 Change of name, title or address
CP03 Change of name, title or address

Address after: 311407 Chiang Ka village, Lushan street, Fuyang District, Hangzhou, Zhejiang

Patentee after: Haist Mei Kos forklift truck (Zhejiang) Co., Ltd.

Address before: 311407 Chiang Ka village, Lushan street, Fuyang, Hangzhou, Zhejiang

Patentee before: Zhejiang Maximal Forklift Co., Ltd.