CN102913507A - Hydraulic cylinder with hollow piston rod - Google Patents
Hydraulic cylinder with hollow piston rod Download PDFInfo
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- CN102913507A CN102913507A CN2012104610394A CN201210461039A CN102913507A CN 102913507 A CN102913507 A CN 102913507A CN 2012104610394 A CN2012104610394 A CN 2012104610394A CN 201210461039 A CN201210461039 A CN 201210461039A CN 102913507 A CN102913507 A CN 102913507A
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- oil
- piston rod
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Abstract
The invention relates to a hydraulic cylinder with a hollow piston rod. The hydraulic cylinder comprises the piston rod, a piston, a guide sleeve, a cylinder body, a support ring and an oil port joint. The hydraulic cylinder is characterized by comprising a hollow oil rod and baffle rings, wherein a centre deep through hole is formed in the centre of the piston rod; the hollow oil rod is arranged in the centre deep through hole of the piston rod, and the baffle rings are arranged on ports arranged a centre deep through hole in a cylinder body and a centre deep through hole between the cylinder body and the hollow oil rod; one end (in the cylinder body) of the hollow oil rod is communicated with a rodless cavity, and one end (which is arranged outside of the cylinder body) of the hollow oil rod is communicated with an oil inlet through hole of the oil port joint; and an oil return through hole of the oil port joint is communicated with the centre deep through hole, the side wall of the piston rod at the rear end of the piston is provided with a plurality of oil through holes, one ends of the oil through holes are communicated with the centre deep through holes, and the other ends of the oil through holes are communicated with a cavity with a rod. The hydraulic cylinder provided by the invention has the advantages that the processing technic is simple, the production cost is reduced and the finished product qualification rate is improved.
Description
Technical field
The present invention relates to a kind of oil hydraulic cylinder, relate in particular to a kind of hollow piston rod oil hydraulic cylinder.
Background technique
The hydraulic piston rod cylinder is an executive component of hydraulic system, it with hydraulic oil as working medium, present hydraulic piston rod cylinder comprises piston rod, piston, guide sleeve, cylinder body, bracing ring and port connection, wherein the front end of piston rod is equipped with piston and stretches in the cylinder body, the rear end of piston rod connects port connection, is provided with oil-feed through hole and oil return through-hole in the port connection; Between piston and cylinder body, be provided with bracing ring, between the inwall of cylinder body port and piston rod, be provided with guide sleeve, piston, guide sleeve and bracing ring are separated into rod chamber and rodless cavity with inner chamber of cylinder block, be provided with an eccentric through-hole and an eccentric dark blind hole at piston rod, the end of eccentric through-hole in cylinder body is communicated with rodless cavity, and the end of eccentric through-hole outside cylinder body is communicated with the oil-feed through hole of port connection; The eccentric dark end of blind hole outside cylinder body is communicated with the oil return through-hole of port connection; The sidewall of the piston rod in cylinder body is provided with an oilhole, and oilhole one end is communicated with eccentric dark blind hole, and the oilhole one end the other end is communicated with rod chamber; Because eccentric through-hole and eccentric dark blind hole are all deep, and all are eccentric openings, wherein a hole or blind hole, and also will open an oilhole is communicated with eccentric dark blind hole, add the man-hour difficulty with the solid piston bar just larger, the scrappage of finished product is higher like this, and processing charges is also higher.
Summary of the invention
For above-mentioned shortcoming, the object of the present invention is to provide a kind of hollow piston rod oil hydraulic cylinder that a kind of processing technology is simple, can reduce production costs and improve product qualified rate.
Technology contents of the present invention is that a kind of hollow piston rod oil hydraulic cylinder comprises piston rod, piston, guide sleeve, cylinder body, bracing ring and port connection; Wherein the front end of piston rod is equipped with piston and stretches in the cylinder body, and the rear end of piston rod connects port connection, is provided with oil-feed through hole and oil return through-hole in the port connection; Be provided with bracing ring between piston and cylinder body, be provided with guide sleeve between the inwall of cylinder body port and piston rod, piston, guide sleeve and bracing ring are separated into rod chamber and rodless cavity with inner chamber of cylinder block; It is characterized in that the hollow piston rod oil hydraulic cylinder also comprises hollow beam hanger and a baffle ring, be provided with a center deep via at the center of piston rod; Hollow beam hanger is arranged in the center deep via of piston rod, baffle ring is installed in the interior center deep via of cylinder body and the port of the center deep via between the hollow beam hanger, the end of hollow beam hanger in cylinder body is communicated with rodless cavity, and the end of hollow beam hanger outside cylinder body is communicated with the oil-feed through hole of port connection; The oil return through-hole of port connection is communicated with the center deep via; Piston rod sidewall at piston rear end is provided with some oil throughs, and oil through one end is communicated with the center deep via, and the other end is communicated with rod chamber.
The advantage that the present invention compared with prior art has is: a hollow beam hanger is set in the deep via of the center of piston rod makes formation oil inlet passage and drainback passage in the piston rod, simplified thus the production technology of oil inlet passage and drainback passage in original piston rod, thus so that hydraulic piston rod cylinder processing technology simple, can reduce production costs and improve product qualified rate.
Description of drawings
Fig. 1 is structural representation of the present invention.
Specific embodiment
As shown in Figure 1, a kind of hollow piston rod oil hydraulic cylinder comprises piston rod 1, piston 2, guide sleeve 3, cylinder body 4, bracing ring 5 and port connection 6; Wherein the front end of piston rod 1 is equipped with piston 2 and stretches in the cylinder body 4, and the rear end of piston rod 1 connects port connection 6, is provided with oil-feed through hole 6.1 and oil return through-hole 6.2 in the port connection 6; Be provided with bracing ring 5 between piston 2 and cylinder body 4, be provided with guide sleeve 3 between the inwall of cylinder body 4 ports and piston rod 1, piston 2, guide sleeve 3 and bracing ring 5 are separated into rod chamber 4.1 and rodless cavity 4.2 with cylinder body 4 inner chambers; It is characterized in that the hollow piston rod oil hydraulic cylinder also comprises hollow beam hanger 7 and a baffle ring 8, is provided with a center deep via 1.1 at the center of piston rod 1; Hollow beam hanger 7 is arranged in the center deep via 1.1 of piston rod 1, baffle ring 8 is installed in center deep via 1.1 in the cylinder body 4 and the port of the center deep via 1.1 between the hollow beam hanger 7, the end of hollow beam hanger 7 in cylinder body 4 is communicated with rodless cavity 4.2, and the end of hollow beam hanger 7 outside cylinder body 4 is communicated with the oil-feed through hole 6.1 of port connection 6; The oil return through-hole 6.2 of port connection 6 is communicated with center deep via 1.1; Piston rod 1 sidewall in piston 2 rear ends is provided with some oil throughs 1.3, and oil through 1.3 1 ends are communicated with center deep via 1.1, and the other end is communicated with rod chamber 4.1.
Working procedure of the present invention is as follows: when hydraulic fluid port A oil-feed, hydraulic oil enters in the hollow beam hanger 7 by the oil-feed through hole 6.1 of port connection 6, is passed in the rodless cavity 4.2 by hollow beam hanger 7 again; Thereby hydraulic oil pushing piston 2 drives piston rod 1 and moves together, simultaneously the hydraulic oil in the rod chamber 4.1 flow into by some oil throughs 1.3 in the oil return through-hole 6.2 of center deep via 1.1 laggard oiler joints 6 of piston rods and from hydraulic fluid port B outflow, thereby piston rod 1 is stretched out in cylinder body 4; When hydraulic fluid port B oil-feed, hydraulic oil enters center deep via 1.1 by the oil return through-hole 6.2 of port connection 6, flow in the rod chamber 4.1 by some oil throughs 1.3 again, hydraulic oil pushing piston 2 also drives piston rod and moves together, hydraulic oil in the rodless cavity 4.2 flows into the oil-feed through hole 6.1 of port connection 6 by the hollow beam hanger 7 in the piston rod and flows out from the A hydraulic fluid port, thereby makes in piston rod 1 retract cylinder 4.
Claims (1)
1. a hollow piston rod oil hydraulic cylinder comprises piston rod (1), piston (2), guide sleeve (3), cylinder body (4), bracing ring (5) and port connection (6); Wherein the front end of piston rod (1) is equipped with piston (2) and stretches in the cylinder body (4), the rear end of piston rod (1) connects port connection (6), is provided with oil-feed through hole (6.1) and oil return through-hole (6.2) in the port connection (6); Between piston (2) and cylinder body (4), be provided with bracing ring (5), be provided with guide sleeve (3) between the inwall of cylinder body (4) port and piston rod (1), piston (2), guide sleeve (3) and bracing ring (5) are separated into rod chamber (4.1) and rodless cavity (4.2) with cylinder body (4) inner chamber; It is characterized in that the hollow piston rod oil hydraulic cylinder also comprises a hollow beam hanger (7) and baffle ring (8), be provided with a center deep via (1.1) at the center of piston rod (1); Hollow beam hanger (7) is arranged in the center deep via (1.1) of piston rod (1), baffle ring (8) is installed in center deep via (1.1) in the cylinder body 4 and the port of the center deep via (1.1) between the hollow beam hanger (7), the end of hollow beam hanger (7) in cylinder body (4) is communicated with rodless cavity (4.2), and the end of hollow beam hanger (7) outside cylinder body (4) is communicated with the oil-feed through hole (6.1) of port connection (6); The oil return through-hole (6.2) of port connection (6) is communicated with center deep via (1.1); Piston rod (1) sidewall in piston (2) rear end is provided with some oil throughs (1.3), and oil through (1.3) one ends are communicated with center deep via (1.1), and the other end is communicated with rod chamber (4.1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104610394A CN102913507A (en) | 2012-11-16 | 2012-11-16 | Hydraulic cylinder with hollow piston rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104610394A CN102913507A (en) | 2012-11-16 | 2012-11-16 | Hydraulic cylinder with hollow piston rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102913507A true CN102913507A (en) | 2013-02-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104610394A Pending CN102913507A (en) | 2012-11-16 | 2012-11-16 | Hydraulic cylinder with hollow piston rod |
Country Status (1)
| Country | Link |
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| CN (1) | CN102913507A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307277A (en) * | 2013-06-14 | 2013-09-18 | 太原重工股份有限公司 | Hydraulic cylinder for tension straightener |
| CN104747710A (en) * | 2015-03-30 | 2015-07-01 | 中国有色(沈阳)泵业有限公司 | High-pressure diaphragm pump piston rod and washing system using piston rod |
| CN105201953A (en) * | 2015-09-14 | 2015-12-30 | 江苏恒立高压油缸股份有限公司 | Bucket cylinder of excavator |
| CN105650054A (en) * | 2016-03-31 | 2016-06-08 | 江阴市洪腾机械有限公司 | Dual-support hydraulic oil cylinder |
| CN108457931A (en) * | 2018-05-03 | 2018-08-28 | 陕西昆仑机械装备制造有限责任公司 | A kind of piston rod oil inlet oil extraction oil cylinder |
| CN112096688A (en) * | 2020-09-07 | 2020-12-18 | 中国航发沈阳黎明航空发动机有限责任公司 | Piston rod automatic heat exchange type hydraulic actuator cylinder for aero-engine |
| CN110500337B (en) * | 2019-04-25 | 2024-04-16 | 江苏恒盈动力科技有限公司 | Hydraulic cylinder type telescopic oil pipe |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000329110A (en) * | 1999-05-21 | 2000-11-28 | Kayaba Ind Co Ltd | Pressure cylinder |
| JP2006283859A (en) * | 2005-03-31 | 2006-10-19 | Komatsu Ltd | Hydraulic cylinder |
| CN201714740U (en) * | 2010-07-22 | 2011-01-19 | 泸州众大科技液压件有限公司 | Multifunctional integrated hydraulic cylinder |
| CN201842244U (en) * | 2010-08-25 | 2011-05-25 | 南京高精船用设备有限公司 | Oil distributor with sliding bearing |
| CN102705292A (en) * | 2012-05-29 | 2012-10-03 | 徐州天龙液压机械有限公司 | Hydraulic oil cylinder with novel connector body |
| CN202914436U (en) * | 2012-11-16 | 2013-05-01 | 江阴市洪腾机械有限公司 | Hollow piston rod hydraulic cylinder |
-
2012
- 2012-11-16 CN CN2012104610394A patent/CN102913507A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000329110A (en) * | 1999-05-21 | 2000-11-28 | Kayaba Ind Co Ltd | Pressure cylinder |
| JP2006283859A (en) * | 2005-03-31 | 2006-10-19 | Komatsu Ltd | Hydraulic cylinder |
| CN201714740U (en) * | 2010-07-22 | 2011-01-19 | 泸州众大科技液压件有限公司 | Multifunctional integrated hydraulic cylinder |
| CN201842244U (en) * | 2010-08-25 | 2011-05-25 | 南京高精船用设备有限公司 | Oil distributor with sliding bearing |
| CN102705292A (en) * | 2012-05-29 | 2012-10-03 | 徐州天龙液压机械有限公司 | Hydraulic oil cylinder with novel connector body |
| CN202914436U (en) * | 2012-11-16 | 2013-05-01 | 江阴市洪腾机械有限公司 | Hollow piston rod hydraulic cylinder |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307277A (en) * | 2013-06-14 | 2013-09-18 | 太原重工股份有限公司 | Hydraulic cylinder for tension straightener |
| CN104747710A (en) * | 2015-03-30 | 2015-07-01 | 中国有色(沈阳)泵业有限公司 | High-pressure diaphragm pump piston rod and washing system using piston rod |
| CN105201953A (en) * | 2015-09-14 | 2015-12-30 | 江苏恒立高压油缸股份有限公司 | Bucket cylinder of excavator |
| CN105650054A (en) * | 2016-03-31 | 2016-06-08 | 江阴市洪腾机械有限公司 | Dual-support hydraulic oil cylinder |
| CN108457931A (en) * | 2018-05-03 | 2018-08-28 | 陕西昆仑机械装备制造有限责任公司 | A kind of piston rod oil inlet oil extraction oil cylinder |
| CN110500337B (en) * | 2019-04-25 | 2024-04-16 | 江苏恒盈动力科技有限公司 | Hydraulic cylinder type telescopic oil pipe |
| CN112096688A (en) * | 2020-09-07 | 2020-12-18 | 中国航发沈阳黎明航空发动机有限责任公司 | Piston rod automatic heat exchange type hydraulic actuator cylinder for aero-engine |
| CN112096688B (en) * | 2020-09-07 | 2022-07-01 | 中国航发沈阳黎明航空发动机有限责任公司 | Piston rod automatic heat exchange type hydraulic actuator cylinder for aero-engine |
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Application publication date: 20130206 |