CN101629591B - Pressurizing cylinder - Google Patents

Pressurizing cylinder Download PDF

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Publication number
CN101629591B
CN101629591B CN 200910182211 CN200910182211A CN101629591B CN 101629591 B CN101629591 B CN 101629591B CN 200910182211 CN200910182211 CN 200910182211 CN 200910182211 A CN200910182211 A CN 200910182211A CN 101629591 B CN101629591 B CN 101629591B
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CN
China
Prior art keywords
oil
oil circuit
chamber
piston
manifold block
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CN 200910182211
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Chinese (zh)
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CN101629591A (en
Inventor
宋自帅
黄腾飞
曹志国
王有虹
夏青顺
郦雪云
刘晓磊
Original Assignee
常州市瑞泰工程机械有限公司
南车戚墅堰机车车辆工艺研究所有限公司
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Priority to CN 200910182211 priority Critical patent/CN101629591B/en
Publication of CN101629591A publication Critical patent/CN101629591A/en
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Publication of CN101629591B publication Critical patent/CN101629591B/en

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Abstract

The invention discloses a pressurizing cylinder which comprises a cylinder body, a piston, a piston rod, a piston rod end connecting piece and an end cover, wherein the piston rod is internally provided with a pressurizing piston, the piston is provided with an opening, one end of the pressurizing piston can penetrate out of the opening of the piston and extend into a first cavity of the cylinder body, the pressuring piston is provided with a through hole, the through hole is communicated with a fourth cavity of an inner cavity of the piston rod, the end part of the cylinder body is provided with a first oil path and a second oil path, one end of the first oil path and one end of the second oil path are both led into a hydraulic integration block, the outlet of the other end of the first oil path is provided with an oil leading pipe, the overhang end of the oil leading pipe passes through the opening of the piston and enters into the through hole of the pressure piston to be communicated with the fourth cavity of the inner cavity of the piston rod, the periphery of the oil leading pipe and the through hole of the pressurizing piston at least keep a section of sealed sliding matching, the other end of the second oil path is led into the first cavity of an inner cavity of the cylinder body, and a second cavity of the inner cavity of the cylinder body is communicated with the hydraulic integration block through a third oil path. The invention has simple structure, convenient manufacture and adjustable clamping force.

Description

Pressurizing cylinder

Technical field

The present invention relates to the apparatus for fastening of steel rail flash welding machine, particularly a kind of hydraulic booster oil cylinder.

Background technique

The seamless process of rail track has been eliminated the seam of rail, has also eliminated the impact and the vibrations of wheel and joint gap in the train driving, has prolonged the working life of wheel track parts, has reduced maintenance expenses.Domestic existing weldering rail equipment because clamping force is not enough, can only weld the long rail string below 100 meters at present, can not satisfy welding 500 meters or longer long rail string and the needs that lock weldering.One Chinese patent application number is that 98106266.0 flash welding rail welder application documents discloses a kind of reinforcement pressurizing cylinder, though its can reinforcement, its control valve is contained on the link of tailpiece of the piston rod, complex structure, is difficult to make and maintenance; Because its oil cylinder is provided with special targeting part, feasible complex structure more, size and weight are big, make difficulty, and there is the risk of leakage of oil in targeting part.In addition, it can not control the output clamping force, is not easy to constructing operation.

Summary of the invention

The object of the present invention is to provide a kind of clamping force that can improve pressurizing cylinder and simple and reasonable for structure, be convenient to control the pressurizing cylinder of output clamping force.

In order to reach to above-mentioned purpose, technological scheme of the present invention is: a kind of pressurizing cylinder comprises cylinder body, piston, piston rod, rod end coupling and end cap; The inner chamber of cylinder body is separated into first chamber and second chamber by piston, and charged piston is housed in the piston rod, and piston rod cavity is pressurized piston and is separated into the 3rd chamber and the 4th chamber; Second chamber is communicated with through oil circuit with the 3rd chamber; Have perforate on the piston, charged piston one end can pass and put in first chamber of cylinder body from the perforate of piston, and charged piston has through hole; Through hole is communicated with the 4th chamber of piston rod cavity; The end of cylinder body has first oil circuit and second oil circuit, and is connected with hydraulic manifold block, and an end of first oil circuit and an end of second oil circuit are all towards hydraulic manifold block; Solenoid directional control valve, guide's reduction valve and Pilot operated check valve are housed on the hydraulic manifold block; Oil guide pipe is equipped with in the outlet port of the other end of first oil circuit, and the projecting end of oil guide pipe passes the perforate of piston and gets in the through hole of charged piston and is communicated with the 4th chamber of piston rod cavity, and the periphery of oil guide pipe and the through hole of charged piston keep one section sealed sliding movingly at least; The second oil circuit the other end leads to first chamber of inner chamber of cylinder block, and second chamber of inner chamber of cylinder block is communicated with hydraulic manifold block through the 3rd oil circuit.

One end of said first oil circuit connects an end of first one-way valve on the hydraulic manifold block; Parallelly connected guide's reduction valve on first one-way valve; The other end of first one-way valve connects the oil revolving end of solenoid directional control valve; The oil inlet end of solenoid directional control valve connects second one-way valve, and the release end of guide's reduction valve is communicated with the oil revolving end of solenoid directional control valve; One end of second oil circuit is communicated with the Pilot operated check valve on the hydraulic manifold block, and solenoid directional control valve is connected with the control oil channel of Pilot operated check valve; The 3rd oil circuit is communicated with the fuel tank loop of hydraulic manifold block.

One end of perhaps said first oil circuit connects an end of first one-way valve on the hydraulic manifold block; Parallelly connected guide's reduction valve on first one-way valve; The other end of first one-way valve connects the oil revolving end of solenoid directional control valve, and the release end of guide's reduction valve is communicated with the oil revolving end of solenoid directional control valve; One end of second oil circuit is communicated with the Pilot operated check valve on the hydraulic manifold block, and solenoid directional control valve is connected with the control oil channel of Pilot operated check valve; The 3rd oil circuit is communicated with the fuel tank loop of hydraulic manifold block.

One end of perhaps said first oil circuit connects the solenoid directional control valve on the hydraulic manifold block, and solenoid directional control valve connects two oil circuits, an oil-feed oil circuit be connected in series the guide's reduction valve and second one-way valve, and a fuel-displaced oil circuit connects the fuel tank loop; Second oil circuit is communicated with the Pilot operated check valve on the hydraulic manifold block, and the control oil channel of Pilot operated check valve is connected with the 3rd oil circuit; The 3rd oil circuit is communicated with the fuel tank loop of hydraulic manifold block.

One end of perhaps said first oil circuit connects the solenoid directional control valve on the hydraulic manifold block, and solenoid directional control valve connects two oil circuits, oil-feed oil circuit guide's reduction valve that is connected in series, and a fuel-displaced oil circuit connects the fuel tank loop; Second oil circuit is communicated with the Pilot operated check valve on the hydraulic manifold block, and the control oil channel of Pilot operated check valve is connected with the 3rd oil circuit; The 3rd oil circuit is communicated with the fuel tank loop of hydraulic manifold block.

Steadily reliable for charged piston is moved with sealing, also be fixed with interior cover near piston end in the said piston rod, the one section periphery of the piston rod part of charged piston and the endoporus sealed sliding of interior cover are movingly.

For the ease of manufacturing, and reduce cost of production, the tube portion welding of the end of said cylinder body and cylinder body is fixing, and piston rod and rod end coupling welding are fixed.

After adopting said structure,, solenoid directional control valve, guide's reduction valve and Pilot operated check valve are housed on the hydraulic manifold block because the end of cylinder body is connected with hydraulic manifold block; Therefore control valve is laid concentratedly, simple in structure, and circuit design is compact; Size is little, connects to change conveniently, is convenient to make and maintenance; Again because oil guide pipe is equipped with in the outlet port of the other end of first oil circuit; The projecting end of oil guide pipe passes the perforate of piston and gets in the through hole of charged piston and is communicated with the 4th chamber of piston rod cavity, and the periphery of oil guide pipe and the through hole of charged piston keep one section sealed sliding movingly at least, and therefore having cancelled application number is the special targeting part of pressurizing cylinder in 98106266.0 documents; And the subsidiary effect that oil cylinder stroke direction guiding is arranged of oil guide pipe of the present invention; Oil guide pipe is located at cylinder interior, does not take the length space of oil cylinder, so structure of the present invention is simpler, compact; Be convenient to make, eliminated the risk of leakage of oil; Also, therefore can realize Electromagnetic Control, make to clamp the reinforcement process automation owing on the hydraulic manifold block solenoid directional control valve, guide's reduction valve and Pilot operated check valve are housed; Simultaneously through regulating the output oil pressure of guide's reduction valve; The input oil pressure of the inner chamber of control pressurizing cylinder, the control boost pressure reaches the purpose of exporting adjustable clamping force; Be convenient to constructing operation, can guarantee that clamping force does not receive the influence and the different rail lengths needed of adaptation clamping of jaw wearing and tearing.The present invention can adapt to the needs of the rail that picks up all lengths, weight, especially can press from both sides 500 meters or longer rail, simultaneously can reduce the negative effect that too high supercharging causes, as: hydraulic fluid leak increases under the high pressure, and oil cylinder such as reduces working life at problem.

Description of drawings

The embodiment who provides below in conjunction with accompanying drawing does further detailed explanation to the present invention.

Fig. 1 is the structural representation of pressurizing cylinder of the present invention;

Fig. 2 is the plan view of Fig. 1;

Fig. 3 is the clamped condition figure of Fig. 2;

Fig. 4 is the reinforcement phase diagram of Fig. 2;

Fig. 5 is the hydraulic pressure linking route figure of the first embodiment of the present invention;

Fig. 6 is the hydraulic pressure linking route figure of the second embodiment of the present invention;

Fig. 7 is the hydraulic pressure linking route figure of the third embodiment of the present invention;

Fig. 8 is the hydraulic pressure linking route figure of the fourth embodiment of the present invention.

Embodiment

Like Fig. 1,2,3, shown in 5, be the first embodiment of the present invention, a kind of pressurizing cylinder; Comprise cylinder body 1, piston 2, piston rod 3, rod end coupling 3-1 and end cap 7; The inner chamber of cylinder body 1 is separated into the first chamber α and the second chamber β by piston 2, and charged piston 5 is housed in the piston rod 3, and piston rod 3 inner chambers are pressurized piston 5 and are separated into the 3rd chamber γ and the 4th chamber δ; The second chamber β is communicated with through oil circuit 1c with the 3rd chamber γ; Have perforate 2-1 on the piston 2, charged piston 5 one ends can pass and put in the first chamber α of cylinder body 1 from the perforate 2-1 of piston 2, and charged piston 5 has through hole 5-2; Through hole 5-2 is communicated with the 4th chamber δ of piston rod 3 inner chambers; The end 1-1 of cylinder body 1 has the first oil circuit 1a and the second oil circuit 1b, and the end of an end and the second oil circuit 1b that is connected with hydraulic manifold block 8, the first oil circuit 1a is all towards hydraulic manifold block 8; Solenoid directional control valve 11, guide's reduction valve 10 and Pilot operated check valve 13 are housed on the hydraulic manifold block 8; Oil guide pipe 6 is equipped with in the outlet port of the other end of the first oil circuit 1a, and the projecting end of oil guide pipe 6 passes the perforate 2-1 of piston 2 and gets among the through hole 5-2 of charged piston 5 and is communicated with the 4th chamber δ of piston rod 3 inner chambers, and the through hole 5-2 of the periphery of oil guide pipe 6 and charged piston 5 keeps one section sealed sliding movingly at least; The second oil circuit 1b the other end leads to the first chamber α of cylinder body 1 inner chamber, and the second chamber β of cylinder body 1 inner chamber is communicated with hydraulic manifold block 8 through the 3rd oil circuit 1d.

Like Fig. 1, shown in 5; The end of the said first oil circuit 1a connects an end of first one-way valve 9 on the hydraulic manifold block 8; Parallelly connected guide's reduction valve 10 on first one-way valve 9; The other end of first one-way valve 9 connects the oil revolving end of solenoid directional control valve 11, and the oil inlet end of solenoid directional control valve 11 connects second one-way valve 12, and the release end of guide's reduction valve 10 is communicated with the oil revolving end of solenoid directional control valve 11; The end of the second oil circuit 1b is communicated with the Pilot operated check valve 13 on the hydraulic manifold block 8, and solenoid directional control valve 11 is connected with the control oil channel of Pilot operated check valve 13; The 3rd oil circuit 1d is communicated with the fuel tank loop of hydraulic manifold block 8.

Like Fig. 1,3, shown in 4, steadily reliable for charged piston is moved with sealing, cover 4 in also being fixed with near piston 2 ends in the said piston rod 3, the one section periphery of the piston rod part 5-3 of charged piston 5 and the endoporus 4-1 sealed sliding of interior cover 4 are movingly.

Like Fig. 1, shown in 2, for the ease of manufacturing, and reduce cost of production, the 1-2 of the tube portion welding of the end 1-1 of said cylinder body 1 and cylinder body 1 is fixing, and piston rod 3 welds fixing with rod end coupling 3-1.

As shown in Figure 6, be the hydraulic pressure linking route figure of the second embodiment of the present invention.The end of the said first oil circuit 1a connects an end of first one-way valve 9 on the hydraulic manifold block 8; Parallelly connected guide's reduction valve 10 on first one-way valve 9; The other end of first one-way valve 9 connects the oil revolving end of solenoid directional control valve 11, and the release end of guide's reduction valve 10 is communicated with the oil revolving end of solenoid directional control valve 11; The end of the second oil circuit 1b is communicated with the Pilot operated check valve 13 on the hydraulic manifold block 8, and solenoid directional control valve 11 is connected with the control oil channel of Pilot operated check valve 13; The 3rd oil circuit 1d is communicated with the fuel tank loop of hydraulic manifold block 8.This embodiment compares with first embodiment shown in Figure 5, and difference is that second one-way valve 12 moves to outside the hydraulic manifold block 8, is placed on the oil outlet end of the external oil hydraulic pump of the present invention 17, and all the other are identical with first embodiment.

As shown in Figure 7, be the hydraulic pressure linking route figure of the third embodiment of the present invention.The end of the said first oil circuit 1a connects the solenoid directional control valve 11 on the hydraulic manifold block 8, and solenoid directional control valve 11 connects two oil circuits, an oil-feed oil circuit 12, one fuel-displaced oil circuits connection fuel tanks of the guide's reduction valve 10 and second one-way valve loop that is connected in series; The second oil circuit 1b is communicated with the Pilot operated check valve 13 on the hydraulic manifold block 8, and the control oil channel of Pilot operated check valve 13 is connected with the 3rd oil circuit 1d; The 3rd oil circuit 1d is communicated with the fuel tank loop of hydraulic manifold block 8.Compare with first embodiment, difference is on hydraulic manifold block 8, to have removed first one-way valve 9, has changed the method that connects of control oil channel of the method that connects and the Pilot operated check valve 13 of solenoid directional control valve 11.

As shown in Figure 8, be the hydraulic pressure linking route figure of the fourth embodiment of the present invention.The end of the said first oil circuit 1a connects the solenoid directional control valve 11 on the hydraulic manifold block 8, and solenoid directional control valve 11 connects two oil circuits, and oil-feed oil circuit 10, one fuel-displaced oil circuits of guide's reduction valve that are connected in series connect the fuel tank loop; The second oil circuit 1b is communicated with the Pilot operated check valve 13 on the hydraulic manifold block 8, and the control oil channel of Pilot operated check valve 13 is connected with the 3rd oil circuit 1d; The 3rd oil circuit 1d is communicated with the fuel tank loop of hydraulic manifold block 8.This embodiment compares with the 3rd embodiment shown in Figure 7, and difference is that second one-way valve 12 moves to outside the hydraulic manifold block 8, is placed on the oil outlet end of the external oil hydraulic pump of the present invention 17, and all the other are identical with the 3rd embodiment.

When the present invention works, connect oil hydraulic pump 17, fuel tank 15 and control panel earlier.

Is example like Fig. 1,3, shown in 5 with the first embodiment of the invention; Process from the open configuration to the clamped condition: the clamping button of control panel is got to the clamping position; Pressure oil from oil hydraulic pump 17 is opened Pilot operated check valve 13 through hydraulic manifold block 8 inner oil circuits, and simultaneously, pressure oil gets into the first chamber α through Pilot operated check valve 13 through the second oil circuit 1b; Promote piston 2 and move to end cap 7 directions with piston rod 3, the hydraulic oil of the second chamber β is through the 3rd oil circuit 1d oil sump tank 15; Charged piston 5 also begins to move to the termination of piston rod 3 simultaneously; The second chamber β hydraulic oil flows into the 3rd chamber γ through oil circuit 1c, and the 4th chamber δ hydraulic oil gets into hydraulic manifold block 8 through oil guide pipe 6, the first oil circuit 1a, through solenoid directional control valve 11; The oil return circuit of the first oil circuit 1a flows back to fuel tank 15.

Like Fig. 3,4, shown in 5, the process from the clamped condition to the pressurized state: press control panel supercharging button, solenoid directional control valve 11 actions, the control oil channel of Pilot operated check valve 13 does not have pressure oil, and Pilot operated check valve 13 is closed, and the second oil circuit 1b closes.Pressure oil gets into the 4th chamber δ through second one-way valve 12, guide's reduction valve 10, solenoid directional control valve 11, the first oil circuit 1a and oil guide pipe 6; The second chamber β and the 3rd chamber γ connect fuel tank 15, and pressure is zero; Charged piston 5 is to the motion of the end of cylinder body 1 1-1 direction, and the first chamber α oil pressure increases.Pressure raising ratio is the ratio of the difference of long-pending difference and charged piston 5 small end areas and oil guide pipe 6 external diameters with oil guide pipe 6 oil duct areas of charged piston 5 large end faces.

Like Fig. 4,5, shown in 1, the process from the pressurized state to the open configuration: control panel is clamped button get to and open the position, solenoid directional control valve 11 dead electricity, action.The 3rd oil circuit advances pressure oil, and Pilot operated check valve 13 is opened, and pressure oil advances the second chamber β through the 3rd oil circuit 1d; Promote piston 2 and move to the end of cylinder body 1 1-1 direction with piston rod 3, simultaneously, the second chamber β hydraulic oil gets into the 3rd chamber γ through oil circuit 1c; Promote charged piston 5 to the motion of the termination of piston rod 3 direction, the 4th chamber δ fluid gets into hydraulic manifold block 8 through the oil guide pipe 6 and the first oil circuit 1a, through solenoid directional control valve 11; The oil return circuit of the first oil circuit 1a flows back to fuel tank 15.

Claims (7)

1. pressurizing cylinder; Comprise cylinder body (1), piston (2), piston rod (3), rod end coupling (3-1) and end cap (7); The inner chamber of cylinder body (1) is separated into first chamber (α) and second chamber (β) by piston (2), and charged piston (5) is housed in the piston rod (3), and piston rod (3) inner chamber is pressurized piston (5) and is separated into the 3rd chamber (γ) and the 4th chamber (δ); Second chamber (β) is communicated with through oil circuit (1c) with the 3rd chamber (γ), it is characterized in that:
Have perforate (2-1) on a, the piston (2), charged piston (5) one ends can pass and put in first chamber (α) of cylinder body (1) from the perforate (2-1) of piston (2),
B, charged piston (5) have through hole (5-2), and through hole (5-2) is communicated with the 4th chamber (δ) of piston rod (3) inner chamber,
The end (1-1) of c, cylinder body (1) has first oil circuit (1a) and second oil circuit (1b), and is connected with hydraulic manifold block (8),
One end of one end of d, first oil circuit (1a) and second oil circuit (1b) is all towards hydraulic manifold block (8),
Solenoid directional control valve (11), guide's reduction valve (10) and Pilot operated check valve (13) are housed on e, the hydraulic manifold block (8),
Oil guide pipe (6) is equipped with in the outlet port of the other end of f, first oil circuit (1a); The projecting end of oil guide pipe (6) passes the perforate (2-1) of piston (2) and gets in the through hole (5-2) of charged piston (5) and is communicated with the 4th chamber (δ) of piston rod (3) inner chamber; The through hole (5-2) of the periphery of oil guide pipe (6) and charged piston (5) keeps one section sealed sliding movingly at least
G, second oil circuit (1b) the other end lead to first chamber (α) of cylinder body (1) inner chamber,
Second chamber (β) of h, cylinder body (1) inner chamber is communicated with hydraulic manifold block (8) through the 3rd oil circuit (1d).
2. pressurizing cylinder according to claim 1; It is characterized in that: an end of said first oil circuit (1a) connects an end of first one-way valve (9) on the hydraulic manifold block (8); First one-way valve (9) is gone up parallelly connected guide's reduction valve (10); The other end of first one-way valve (9) connects the oil revolving end of solenoid directional control valve (11), and the oil inlet end of solenoid directional control valve (11) connects second one-way valve (12), and the release end of guide's reduction valve (10) is communicated with the oil revolving end of solenoid directional control valve (11); One end of second oil circuit (1b) is communicated with the Pilot operated check valve (13) on the hydraulic manifold block (8), and solenoid directional control valve (11) is connected with the control oil channel of Pilot operated check valve (13); The 3rd oil circuit (1d) is communicated with the fuel tank loop of hydraulic manifold block (8).
3. pressurizing cylinder according to claim 1; It is characterized in that: an end of said first oil circuit (1a) connects an end of first one-way valve (9) on the hydraulic manifold block (8); First one-way valve (9) is gone up parallelly connected guide's reduction valve (10); The other end of first one-way valve (9) connects the oil revolving end of solenoid directional control valve (11), and the release end of guide's reduction valve (10) is communicated with the oil revolving end of solenoid directional control valve (11); One end of second oil circuit (1b) is communicated with the Pilot operated check valve (13) on the hydraulic manifold block (8), and solenoid directional control valve (11) is connected with the control oil channel of Pilot operated check valve (13); The 3rd oil circuit (1d) is communicated with the fuel tank loop of hydraulic manifold block (8).
4. pressurizing cylinder according to claim 1; It is characterized in that: an end of said first oil circuit (1a) connects the solenoid directional control valve (11) on the hydraulic manifold block (8); Solenoid directional control valve (11) connects two oil circuits; An oil-feed oil circuit be connected in series guide's reduction valve (10) and second one-way valve (12), a fuel-displaced oil circuit connects the fuel tank loop; Second oil circuit (1b) is communicated with the Pilot operated check valve (13) on the hydraulic manifold block (8), and the control oil channel of Pilot operated check valve (13) is connected with the 3rd oil circuit (1d); The 3rd oil circuit (1d) is communicated with the fuel tank loop of hydraulic manifold block (8).
5. pressurizing cylinder according to claim 1; It is characterized in that: an end of said first oil circuit (1a) connects the solenoid directional control valve (11) on the hydraulic manifold block (8); Solenoid directional control valve (11) connects two oil circuits; Oil-feed oil circuit guide's reduction valve (10) that is connected in series, a fuel-displaced oil circuit connects the fuel tank loop; Second oil circuit (1b) is communicated with the Pilot operated check valve (13) on the hydraulic manifold block (8), and the control oil channel of Pilot operated check valve (13) is connected with the 3rd oil circuit (1d); The 3rd oil circuit (1d) is communicated with the fuel tank loop of hydraulic manifold block (8).
6. pressurizing cylinder according to claim 1 is characterized in that: also be fixed with interior cover (4) near piston (2) end in the said piston rod (3), the one section periphery of the piston rod part (5-3) of charged piston (5) and endoporus (4-1) sealed sliding of interior cover (4) are movingly.
7. pressurizing cylinder according to claim 1 is characterized in that: the end (1-1) of said cylinder body (1) is welded with the tube portion (1-2) of cylinder body (1) and is fixed, and piston rod (3) is fixing with rod end coupling (3-1) welding.
CN 200910182211 2009-06-30 2009-06-30 Pressurizing cylinder CN101629591B (en)

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CN 200910182211 CN101629591B (en) 2009-06-30 2009-06-30 Pressurizing cylinder

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CN 200910182211 CN101629591B (en) 2009-06-30 2009-06-30 Pressurizing cylinder

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CN101629591B true CN101629591B (en) 2012-06-06

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102562713A (en) * 2012-01-29 2012-07-11 嘉善雪帕尔工具有限公司 Quick cylinder
CN102619810A (en) * 2012-04-24 2012-08-01 温州鹤立液压机械有限公司 Hydraulic press oil cylinder with multiplied pressure
CN104373417A (en) * 2014-10-28 2015-02-25 奉化鑫益气动工程有限公司 Dust removal air cylinder
CN105170364A (en) * 2015-08-10 2015-12-23 王及忠 Novel cylinder for coating machine
CN107131174B (en) * 2017-06-15 2018-09-14 湖北工业大学 The built-in main hydraulic cylinder of supercharging of large-tonnage full-automatic hydraulic brick machine
CN108953286A (en) * 2018-11-01 2018-12-07 江苏恒立液压股份有限公司 Clamping cylinder

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3877349A (en) * 1974-05-15 1975-04-15 Singer Co Dual opposite motion extending and retracting ram fluid cylinders
US5522212A (en) * 1994-12-21 1996-06-04 Kubik; Philip A. Rod equal displacement cylinder in a rapid transfer and feed system
JP2000346012A (en) * 1999-06-04 2000-12-12 Oil Drive Kogyo Kk Hydraulic cylinder and hydraulic device using thereof
CN201428662Y (en) * 2009-06-30 2010-03-24 常州市瑞泰工程机械有限公司 Pressurizing oil cylinder

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3877349A (en) * 1974-05-15 1975-04-15 Singer Co Dual opposite motion extending and retracting ram fluid cylinders
US5522212A (en) * 1994-12-21 1996-06-04 Kubik; Philip A. Rod equal displacement cylinder in a rapid transfer and feed system
JP2000346012A (en) * 1999-06-04 2000-12-12 Oil Drive Kogyo Kk Hydraulic cylinder and hydraulic device using thereof
CN201428662Y (en) * 2009-06-30 2010-03-24 常州市瑞泰工程机械有限公司 Pressurizing oil cylinder

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Address after: 213022, Changzhou, Jiangsu New District hi tech park, building B, block

Co-patentee after: CRRC QISHUYAN INSTITUTE CO., LTD.

Patentee after: Changzhou Ruitai Engineering Machinery Co., Ltd.

Address before: 213022, Changzhou, Jiangsu New District hi tech park, building B, block

Co-patentee before: Nanche Qisuyan Engine and Vehicle Technics Institute Co., Ltd.

Patentee before: Changzhou Ruitai Engineering Machinery Co., Ltd.