CN201944034U - Double-stage hydraulic cylinder - Google Patents

Double-stage hydraulic cylinder Download PDF

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Publication number
CN201944034U
CN201944034U CN2010206870570U CN201020687057U CN201944034U CN 201944034 U CN201944034 U CN 201944034U CN 2010206870570 U CN2010206870570 U CN 2010206870570U CN 201020687057 U CN201020687057 U CN 201020687057U CN 201944034 U CN201944034 U CN 201944034U
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CN
China
Prior art keywords
hydraulic cylinder
oil
communicated
oil hydraulic
double
Prior art date
Application number
CN2010206870570U
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Chinese (zh)
Inventor
施战军
刘建魁
许家勤
余其耀
冯建军
易海军
向东
兰金堂
Original Assignee
中船重工中南装备有限责任公司
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Priority to CN2010206870570U priority Critical patent/CN201944034U/en
Application granted granted Critical
Publication of CN201944034U publication Critical patent/CN201944034U/en

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Abstract

The utility model relates to a double-stage hydraulic cylinder. A first hydraulic cylinder is connected with a second hydraulic cylinder through an upper connecting seat and a lower connecting seat; an oil inlet A and an oil inlet B are arranged on the second hydraulic cylinder, the oil inlet A is communicated with a rod-free cavity of the second hydraulic cylinder through an oil passing pipe, and the oil inlet B is communicated with a rod cavity of the second hydraulic cylinder through an oil passing cavity and an oil passing port; and the rod-free cavity of the second hydraulic cylinder is communicated with a rod-free cavity of the first hydraulic cylinder through an oil pipe, and the rod cavity of the second hydraulic cylinder is communicated with a rod cavity of the first hydraulic cylinder through the oil pipe. As the first hydraulic cylinder and the second hydraulic cylinder are reservedly stacked and connected, by adopting the mode of oil path connected in series, the double-stage hydraulic cylinder provided has the advantages of large stroke, small size, simple and compact structure, is easy to manufacture and disassemble and can ensure the protrusion and retraction of a leg oil cylinder arranged on an X type leg-series concrete pump truck.

Description

The double-stage hydraulic cylinder

Technical field

The utility model relates to a kind of oil hydraulic cylinder, the double-stage hydraulic cylinder that particularly a kind of two hydraulic jacks are in series.

Background technique

At present, oil hydraulic cylinder will be realized enough flexible strokes, and then volume is bigger, can not satisfy for compact, the narrow and small operating mode in space.The X type telescopic outrigger structure that adopts of pump truck for example.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of double-stage hydraulic cylinder, and extending amount is big, and volume is little, and simple and compact for structure, easy manufacturing is easy to dismounting, and it is narrow and small to adapt to the space, and compact structure is to stroke, the conditional applied environment of mounting distance size.

For solving the problems of the technologies described above, the technological scheme that the utility model adopted is: a kind of double-stage hydraulic cylinder, and first oil hydraulic cylinder is connected with lower connecting base by upper connecting base with second oil hydraulic cylinder;

Second oil hydraulic cylinder is provided with filler opening A and filler opening B, and filler opening A passed through oil pipe and is communicated with the rodless cavity of second oil hydraulic cylinder, and filler opening B passed through oil pocket and crossed hydraulic fluid port to be communicated with the rod chamber of second oil hydraulic cylinder;

The rodless cavity of second oil hydraulic cylinder is communicated with by the rodless cavity of oil pipe with first oil hydraulic cylinder, and the rod chamber of second oil hydraulic cylinder is communicated with by the rod chamber of oil pipe with first oil hydraulic cylinder.

Described first oil hydraulic cylinder and second oil hydraulic cylinder are for oppositely to be connected.

Described first oil hydraulic cylinder is connected for overlapping with second oil hydraulic cylinder.

The outer wall of described first oil hydraulic cylinder is provided with first oil pipe, one end is communicated with the top of the first oil hydraulic cylinder rod chamber, the other end is communicated with first left oil port, also is provided with first right oil port on the outer wall of first oil hydraulic cylinder, and it is communicated with the rodless cavity top of first oil hydraulic cylinder;

The outer wall of described second oil hydraulic cylinder is provided with second oil pipe, one end is communicated with the top of the second oil hydraulic cylinder rodless cavity, the other end is communicated with second left oil port, also is provided with second right oil port on the outer wall of second oil hydraulic cylinder, and it is communicated with the rod chamber top of second oil hydraulic cylinder.

In described second oil hydraulic cylinder, second piston rod passes guide sleeve and is installed in second hydraulic cylinder;

The external diameter at described guide sleeve C place is greater than hydraulic cylinder body internal diameter 0.5-1mm.

In described second oil hydraulic cylinder, second piston rod passes guide sleeve and is installed in second hydraulic cylinder;

The bar portion hollow of second piston rod was provided with oil pipe in it, cross between oil pipe and the bar cavities and formed oil pocket, crossed oil pipe one end and was communicated with second pistons end, and the other end is communicated with filler opening A;

Be provided with hydraulic fluid port at second piston rod near the side of second piston, and crossed hydraulic fluid port and cross oil pocket and be communicated with, the mistake oil pocket is communicated with filler opening B.

The side of described second piston was provided with oil groove.

Described lower connecting base is provided with a stage, and its F face cooperates with the E face of upper connecting base.

A kind of double-stage hydraulic cylinder, first oil hydraulic cylinder is connected with lower connecting base by upper connecting base with second oil hydraulic cylinder;

Second oil hydraulic cylinder is provided with filler opening A and filler opening B, and filler opening A passed through oil pipe and is communicated with the rodless cavity of second oil hydraulic cylinder, and filler opening B passed through oil pocket and crossed hydraulic fluid port to be communicated with the rod chamber of second oil hydraulic cylinder;

The rodless cavity of second oil hydraulic cylinder is communicated with by the rodless cavity of oil pipe with first oil hydraulic cylinder, and the rod chamber of second oil hydraulic cylinder is communicated with by the rod chamber of oil pipe with first oil hydraulic cylinder.

Described first oil hydraulic cylinder and second oil hydraulic cylinder are for oppositely to be connected.

Described first oil hydraulic cylinder is connected for overlapping with second oil hydraulic cylinder.

The outer wall of described first oil hydraulic cylinder is provided with first oil pipe, one end is communicated with the top of the first oil hydraulic cylinder rod chamber, the other end is communicated with first left oil port, also is provided with first right oil port on the outer wall of first oil hydraulic cylinder, and it is communicated with the rodless cavity top of first oil hydraulic cylinder;

The outer wall of described second oil hydraulic cylinder is provided with second oil pipe, one end is communicated with the top of the second oil hydraulic cylinder rodless cavity, the other end is communicated with second left oil port, also is provided with second right oil port on the outer wall of second oil hydraulic cylinder, and it is communicated with the rod chamber top of second oil hydraulic cylinder.

In described second oil hydraulic cylinder, second piston rod passes guide sleeve and is installed in second hydraulic cylinder;

The external diameter at described guide sleeve C place is greater than hydraulic cylinder body internal diameter 0.5-1mm.

In described second oil hydraulic cylinder, second piston rod passes guide sleeve and is installed in second hydraulic cylinder;

The bar portion hollow of second piston rod was provided with oil pipe in it, cross between oil pipe and the bar cavities and formed oil pocket, crossed oil pipe one end and was communicated with pistons end, and the other end is communicated with filler opening A;

Be provided with hydraulic fluid port at second piston rod near the side of piston, and crossed hydraulic fluid port and cross oil pocket and be communicated with, the mistake oil pocket is communicated with filler opening B.

The side of described piston was provided with oil groove.

Described lower connecting base is provided with a stage, and its F face cooperates with the E face of upper connecting base.

A kind of double-stage hydraulic cylinder that the utility model provides, by oppositely being piled up with second oil hydraulic cylinder, first oil hydraulic cylinder is connected, and the mode that adopts oil circuit to contact, it is big to make product have an extending amount, volume is little, simple and compact for structure, easy manufacturing, the advantage that is easy to dismantle, the stretching out and withdraw of support oil cylinder that can guarantee to be installed on X type supporting leg series concrete pump truck.The series loop of adopting because there is pressure drop in the oil circuit between first oil hydraulic cylinder and second oil hydraulic cylinder, has realized that the order of first oil hydraulic cylinder and second oil hydraulic cylinder is flexible;

The oil pipe of crossing of second piston rod of optimizing and setting has dwindled overall volume; The guide sleeve of optimizing is at the cylinder diameter big 0.5-1mm of the C place external diameter that O RunddichtringO and back-up ring are installed than oil hydraulic cylinder, be oil hydraulic cylinder cylinder body herein internal diameter increase 0.5-1mm, the also big 0.5-1mm of groove dimensions of corresponding O RunddichtringO and back-up ring, thereby can guarantee the screw thread D place coaxality height that the C place cooperates with the cylinder body of oil hydraulic cylinder, effectively avoided because cylinder body is oversize, processing back junction plane C place endoporus and cylinder inner bore coaxality difference and when causing O RunddichtringO and retaining ring sealing the many on one side one side of decrement lack.The problem that sealing effect is bad.

What be provided with on second piston crosses oil groove except with oil-through hole cooperated oil, and its end face is also spacing as piston rod simultaneously.

The cooperation of E face and F face between upper connecting base and the lower connecting base can be when bolt be cut inefficacy, and E face and F face enough bear the shearing stress of oil hydraulic cylinder.Increased the reliability of oil hydraulic cylinder.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is a plan view of the present utility model.

Fig. 2 is a plan view of the present utility model.

Fig. 3 is a left view of the present utility model.

Fig. 4 is the structural representation of guide sleeve in the utility model.

Fig. 5 is a structure of piston schematic representation in the utility model.

Fig. 6 is the structural representation of upper connecting base in the utility model.

Fig. 7 is the structural representation of lower connecting base in the utility model.

Fig. 8 is the partial enlarged drawing at G place among Fig. 1.

Fig. 9 is the structural representation of second piston rod in the utility model.

Embodiment

In Fig. 1, Fig. 2 and Fig. 3, a kind of double-stage hydraulic cylinder, first oil hydraulic cylinder 1 is connected with lower connecting base 4 by upper connecting base 3 with second oil hydraulic cylinder 2;

Second oil hydraulic cylinder 2 is provided with filler opening A18 and filler opening B19, and filler opening A18 passed through oil pipe 11 and is communicated with the rodless cavity of second oil hydraulic cylinder 2, and filler opening B19 passed through oil pocket 12 and crossed hydraulic fluid port 20 to be communicated with the rod chamber of second oil hydraulic cylinder 2;

The rodless cavity of second oil hydraulic cylinder 2 is communicated with by the rodless cavity of oil pipe with first oil hydraulic cylinder 1, and the rod chamber of second oil hydraulic cylinder 2 is communicated with by the rod chamber of oil pipe with first oil hydraulic cylinder 2.

Described first oil hydraulic cylinder 1 and second oil hydraulic cylinder 2 are for oppositely to be connected.

Described first oil hydraulic cylinder 1 is connected for overlapping with second oil hydraulic cylinder 2.

In Fig. 2, the outer wall of described first oil hydraulic cylinder 1 is provided with first oil pipe, 5, one ends and is communicated with the top of first oil hydraulic cylinder, 1 rod chamber, and the other end is communicated with first left oil port 6, also be provided with first right oil port 7 on the outer wall of first oil hydraulic cylinder 1, its rodless cavity top with first oil hydraulic cylinder 1 is communicated with;

In Fig. 1, the outer wall of described second oil hydraulic cylinder 2 is provided with second oil pipe, 9, one ends and is communicated with the top of second oil hydraulic cylinder, 2 rodless cavities, and the other end is communicated with second left oil port 10, also be provided with second right oil port 16 on the outer wall of second oil hydraulic cylinder 1, its rod chamber top with second oil hydraulic cylinder 2 is communicated with.

In second oil hydraulic cylinder 2 described in Fig. 1, Fig. 4, Fig. 8, second piston rod 17 passes guide sleeve 14 and is installed in second hydraulic cylinder 8;

The external diameter at described guide sleeve 14C place is greater than hydraulic cylinder body internal diameter 0.5-1mm.Promptly at the cylinder diameter big 0.5-1mm of the C place external diameter that O RunddichtringO and back-up ring are installed than oil hydraulic cylinder, be oil hydraulic cylinder cylinder body herein internal diameter increase 0.5-1mm, the also big 0.5-1mm of groove dimensions of corresponding O RunddichtringO and back-up ring, thereby can guarantee the screw thread D place coaxality height that the C place cooperates with the cylinder body of oil hydraulic cylinder, effectively avoided because cylinder body is oversize, processing back junction plane C place endoporus and cylinder inner bore coaxality difference and when causing O RunddichtringO and retaining ring sealing the many on one side one side of decrement lack.The problem that sealing effect is bad.In first oil hydraulic cylinder 1, also adopted identical design.

In described second oil hydraulic cylinder 2, second piston rod 17 passes guide sleeve 14 and is installed in second hydraulic cylinder 8;

In Fig. 9, the bar portion hollow of second piston rod 17 was provided with oil pipe 11 in it, crossed between oil pipe 11 and the bar cavities and formed oil pocket 12, crossed oil pipe 11 1 ends and was communicated with second piston, 15 ends, and the other end is communicated with filler opening A18;

Be provided with hydraulic fluid port 20 at second piston rod 17 near the side of second pistons 15, and crossed hydraulic fluid port 20 and cross oil pocket 12 and be communicated with, mistake oil pocket 12 is communicated with filler opening B19.

In Fig. 5, the side of described second piston 15 was provided with oil groove 21.

In Fig. 6, Fig. 7, described lower connecting base 4 is provided with a stage, and its F face cooperates with the E face of upper connecting base 3.Can be when bolt to be cut inefficacy, E face and F face enough bear the shearing stress of oil hydraulic cylinder.Increased the reliability of oil hydraulic cylinder.

During use, hydraulic oil entered oil pipe 11 from filler opening A18, be drained into the rodless cavity of second oil hydraulic cylinder 2 through second piston 15, promoting second piston rod 17 stretches out to the right, because first oil hydraulic cylinder 1 and second oil hydraulic cylinder 2 have pressure difference, this be since between the oil circuit and the oil pipe that connect cause, after second piston rod 17 stretches out crossing oil groove 21 end faces and pushing up guide sleeve 14 end faces of i.e. second piston 15 fully, simultaneously hydraulic oil from second oil pipe 9 through second left oil port 10, oil pipe, first right oil port 7 enters the rodless cavity of first oil hydraulic cylinder 1, promote first piston 22 and drive first piston bar 13 operation left, until stretching out fully.

During withdrawal, hydraulic oil entered into oil pocket 12 from filler opening B19, and passed through hydraulic fluid port 20 and crossed oil groove 21 and entered in the rod chamber of second oil hydraulic cylinder 2, promoting second piston rod 17 withdraws left, because the existence of pressure drop, after second piston rod 17 is withdrawn fully, hydraulic oil enters in the rod chamber of first oil hydraulic cylinder 1 from second right oil port 16, oil pipe, first left oil port 6 and first oil pipe 5, promote first piston 22 and drive first piston bar 13 withdrawal to the right, thereby realize that multistage order of the present utility model is flexible.

In sum, it is big to the utlity model has extending amount, and volume is little, simple and compact for structure, easy manufacturing, the advantage that is easy to dismantle.The bar header structure of piston rod is small and exquisite, is easy to processing, has realized communicating of heavy wool road.Guide sleeve designs two grooves and adorns two cover O type circle and back-up rings, and guide sleeve suitably strengthens with the cylinder inner bore junction plane, can fine solution long pole working axiality problem, and the further effective sealing problem of assurance junction plane.Piston has four and crosses oil grooves and not only can cross oil but also can be spacing, and piston links to each other with piston rod by screw thread.Upper connecting base and lower connecting base are welded by plate, then machine shaping.Wherein time processing can be matched successfully in four holes.The E face of upper connecting base, the F face of lower connecting base both can be used as locating face, also can be used as the face of main strength.If promptly when bolt was cut inefficacy, E face and F face enough bore the shearing stress of oil cylinder.Increased the reliability of oil cylinder.

Claims (8)

1. double-stage hydraulic cylinder, it is characterized in that: first oil hydraulic cylinder (1) is connected with lower connecting base (4) by upper connecting base (3) with second oil hydraulic cylinder (2);
Second oil hydraulic cylinder (2) is provided with filler opening A(18) and filler opening B(19), filler opening A(18) passed through oil pipe (11) and be communicated with filler opening B(19 with the rodless cavity of second oil hydraulic cylinder (2)) passed through oil pocket (12) and crossed hydraulic fluid port (20) to be communicated with the rod chamber of second oil hydraulic cylinder (2);
The rodless cavity of second oil hydraulic cylinder (2) is communicated with by the rodless cavity of oil pipe with first oil hydraulic cylinder (1), and the rod chamber of second oil hydraulic cylinder (2) is communicated with by the rod chamber of oil pipe with first oil hydraulic cylinder (2).
2. a kind of double-stage hydraulic cylinder according to claim 1 is characterized in that: described first oil hydraulic cylinder (1) and second oil hydraulic cylinder (2) are for oppositely to be connected.
3. a kind of double-stage hydraulic cylinder according to claim 1 is characterized in that: described first oil hydraulic cylinder (1) is connected for overlapping with second oil hydraulic cylinder (2).
4. a kind of double-stage hydraulic cylinder according to claim 1, it is characterized in that: the outer wall of described first oil hydraulic cylinder (1) is provided with first oil pipe (5), one end is communicated with the top of first oil hydraulic cylinder (1) rod chamber, the other end is communicated with first left oil port (6), also be provided with first right oil port (7) on the outer wall of first oil hydraulic cylinder (1), its rodless cavity top with first oil hydraulic cylinder (1) is communicated with;
The outer wall of described second oil hydraulic cylinder (2) is provided with second oil pipe (9), one end is communicated with the top of second oil hydraulic cylinder (2) rodless cavity, the other end is communicated with second left oil port (10), also be provided with second right oil port (16) on the outer wall of second oil hydraulic cylinder (1), its rod chamber top with second oil hydraulic cylinder (2) is communicated with.
5. a kind of double-stage hydraulic cylinder according to claim 1 is characterized in that: in described second oil hydraulic cylinder (2), second piston rod (17) passes guide sleeve (14) and is installed in second hydraulic cylinder (8);
The external diameter at described guide sleeve (14) C place is greater than hydraulic cylinder body internal diameter 0.5-1mm.
6. a kind of double-stage hydraulic cylinder according to claim 1 is characterized in that: in described second oil hydraulic cylinder (2), second piston rod (17) passes guide sleeve (14) and is installed in second hydraulic cylinder (8);
The bar portion hollow of second piston rod (17) was provided with oil pipe (11) in it, cross between oil pipe (11) and the bar cavities and formed oil pocket (12), crossed oil pipe (11) one ends and was communicated with the other end and filler opening A(18 with second piston (15) end) be communicated with;
Be provided with hydraulic fluid port (20) at second piston rod (17) near the side of second piston (15), and crossed hydraulic fluid port (20) and cross oil pocket (12) and be communicated with mistake oil pocket (12) and filler opening B(19) be communicated with.
7. a kind of double-stage hydraulic cylinder according to claim 1 is characterized in that: the side of described second piston (15) was provided with oil groove (21).
8. a kind of double-stage hydraulic cylinder according to claim 1 is characterized in that: described lower connecting base (4) is provided with a stage, and its F face cooperates with the E face of upper connecting base (3).
CN2010206870570U 2010-12-29 2010-12-29 Double-stage hydraulic cylinder CN201944034U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010206870570U CN201944034U (en) 2010-12-29 2010-12-29 Double-stage hydraulic cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010206870570U CN201944034U (en) 2010-12-29 2010-12-29 Double-stage hydraulic cylinder

Publications (1)

Publication Number Publication Date
CN201944034U true CN201944034U (en) 2011-08-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010206870570U CN201944034U (en) 2010-12-29 2010-12-29 Double-stage hydraulic cylinder

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103758817A (en) * 2014-02-17 2014-04-30 王建虎 Supporting cylinder and spackling machine
CN104176017A (en) * 2014-08-19 2014-12-03 安徽星马专用汽车有限公司 Combined oil cylinder, front supporting leg subassembly and concrete pump truck
CN105465097A (en) * 2015-12-23 2016-04-06 北汽福田汽车股份有限公司 Engineering machine and multilevel telescopic mechanism thereof and piston assembly

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103758817A (en) * 2014-02-17 2014-04-30 王建虎 Supporting cylinder and spackling machine
CN104176017A (en) * 2014-08-19 2014-12-03 安徽星马专用汽车有限公司 Combined oil cylinder, front supporting leg subassembly and concrete pump truck
CN105465097A (en) * 2015-12-23 2016-04-06 北汽福田汽车股份有限公司 Engineering machine and multilevel telescopic mechanism thereof and piston assembly

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GR01 Patent grant
EXPY Termination of patent right or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110824

Termination date: 20141229