CN103671348A - Lifting hydraulic oil cylinder of mining dump truck - Google Patents

Lifting hydraulic oil cylinder of mining dump truck Download PDF

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Publication number
CN103671348A
CN103671348A CN201310691138.6A CN201310691138A CN103671348A CN 103671348 A CN103671348 A CN 103671348A CN 201310691138 A CN201310691138 A CN 201310691138A CN 103671348 A CN103671348 A CN 103671348A
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CN
China
Prior art keywords
cylinder barrel
lifting
grades
oil
piston rod
Prior art date
Application number
CN201310691138.6A
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Chinese (zh)
Inventor
王文迪
梁小波
刘志清
刘震
杨国龙
Original Assignee
湘电重型装备有限公司
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.)
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Application filed by 湘电重型装备有限公司 filed Critical 湘电重型装备有限公司
Priority to CN201310691138.6A priority Critical patent/CN103671348A/en
Publication of CN103671348A publication Critical patent/CN103671348A/en

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Abstract

A lifting hydraulic oil cylinder of a mining dump truck comprises a first-stage cylinder barrel. The upper end of the first-stage cylinder barrel is fixedly connected with an end cover, and the lower end of the end cover is fixedly connected with a buffering valve; a movable second-stage cylinder barrel and a first piston head are arranged inside the first-stage cylinder barrel, a movable third-stage cylinder barrel and a second piston head are installed in the second-stage cylinder barrel, and a piston rod and a third piston head are arranged in the third-stage cylinder barrel; a lifting pressure oil passage and a first annular interval are arranged in the center of the piston rod; an oil passing hole is formed in the upper portion of the buffering valve, and a one-way valve is arranged at the lower portion of an inner cavity of the buffering valve; a sealed interval formed by the inner side wall of the first-stage cylinder barrel, the lower end of the end cover, the upper end of the second-stage cylinder barrel and the upper end of the third-stage cylinder barrel is a lifting large cavity; a second annular interval is formed between the outer side wall of the buffering valve and the inner side wall of the lifting pressure oil passage. The lifting hydraulic oil cylinder of the mining dump truck is simple and compact in structure, capable of achieving the buffering function of lifting and contracting of the oil cylinder, long in service life and particularly suitable for a lifting system of a large-size dump truck working under a severe environment.

Description

A kind of quarry tipper lifting hydraulic jack

Technical field

The present invention relates to a kind of quarry tipper lifting hydraulic jack, particularly relate to a kind of three grades of lifting hydraulic jacks of quarry tipper that lifting and retraction pooling feature are set.

Background technique

Many Multi-stage lifting oil cylinders only need cushion at end of travel, are in order to eliminate the excessive mechanical impact causing between cylinder head and piston of inertial force because of piston like this, avoid parts to damage; Meanwhile, be also the noise sending because movement velocity is too fast in order to reduce piston, and solve when body of tipper carriage declines and prevent that compartment from producing the excessive grade power of rushing to vehicle frame.Existing quarry tipper lifting hydraulic jack, by being set on the end cap in cylinder barrel bottom, buffer cavity, oil circuit, throttle orifice etc. realize buffering, like this, can cause that end cap volume is large, complex structure, processing difficulties, manufacture cost be high, and general multi-stage oil cylinder only arranges buffering and buffering is not set during in lifting when compression, thereby so not only greatly reduce the working life of oil cylinder but also can to equipment, damage whole equipment generation percussion.

Summary of the invention

The technical problem to be solved in the present invention is: overcome the above-mentioned defect that prior art exists, provide a kind of volume little, simple in structure, easily install, possess three grades of lifting hydraulic jacks of quarry tipper of lifting and compression pooling feature simultaneously.

The technical solution adopted for the present invention to solve the technical problems is:

A quarry tipper lifting hydraulic jack, comprises one-level cylinder barrel, the affixed end cap in upper end of one-level cylinder barrel, the affixed trimmer valve in end cap lower end; One-level cylinder barrel is in-built to be had secondary cylinder barrel movably and is fixed in the first piston head of secondary cylinder barrel upper end, secondary cylinder barrel is in-built to be had three grades of cylinder barrels movably and is fixed in the second piston head of three grades of cylinder barrel upper ends, in described three grades of cylinder barrels, piston rod is housed and is fixed in the 3rd piston head on piston rod; The center of described piston rod is provided with lift-off pressures oil passage and is used as the first annular space of forced landing pressure oil passage, and the first annular space is located between the lift-off pressures oil outer side wall of passage and the madial wall of piston rod; Described trimmer valve top is provided with oil-through hole, and one-way valve is equipped with in the inner chamber bottom of trimmer valve; The closing gap that the upper end of the madial wall of described one-level cylinder barrel, the lower end of end cap, secondary cylinder barrel, the upper end of three grades of cylinder barrels form is the large chamber of lifting; Between the madial wall of the outer side wall of described trimmer valve and lift-off pressures oil passage, be provided with the second annular space.

Further, described lift-off pressures oil feeder connection place is provided with the guide sleeve that prevents from producing when trimmer valve from falling deflection.

Further, the profile of described trimmer valve is the multidiameter shaft shape that radius reduces step by step, and trimmer valve from top to bottom radius reduces step by step.

Further, described secondary cylinder barrel top is provided with the first lifting oil drainage hole, between one-level cylinder barrel and secondary cylinder barrel, is provided with the first buffer cavity, and the highest buffer position of the first buffer cavity is higher than the position of offering of the first lifting oil drainage hole; Described three grades of cylinder barrel tops are provided with the second lifting oil drainage hole, between secondary cylinder barrel and three grades of cylinder barrels, are provided with the second buffer cavity, and the highest buffer position of the second buffer cavity is higher than the position of offering of the second lifting oil drainage hole; Described piston rod top is provided with the 3rd lifting oil drainage hole communicating with the first annular space, between three grades of cylinder barrels and piston rod, is provided with the 3rd buffer cavity, and the highest buffer position of the 3rd buffer cavity is higher than the position of offering of the 3rd lifting oil drainage hole.

Further, the bottom of described one-level cylinder barrel is provided with the first stuffing box gland, the bottom of secondary cylinder barrel is provided with the second stuffing box gland, the bottom of three grades of cylinder barrels is provided with the 3rd stuffing box gland, the madial wall of the first stuffing box gland, the second stuffing box gland, the 3rd stuffing box gland is equipped with four grooves, and dust ring, the first seal ring, the second seal ring, the first supporting ring are housed respectively in four grooves.

Further, the outside of the first piston head of described secondary cylinder barrel upper end has groove, and the second supporting ring is housed in groove.

Further, the outside of the second piston head of described three grades of cylinder barrel upper ends has groove, and the 3rd supporting ring and seal ring is housed in groove.

Further, the outside of described the 3rd piston head has groove, and another seal ring and the 4th supporting ring are housed in groove.

The present invention is simple in structure, compact, can realize the pooling feature of lifting and retraction, remarkable to the effect in working life of elongated component, is particularly suitable for working in the hoisting system of the Large Dump Truck under rugged environment.

Accompanying drawing explanation

Fig. 1 is the structural representation of quarry tipper lifting hydraulic jack of the present invention under compressive state;

The structural representation of Fig. 2 quarry tipper lifting of the present invention hydraulic jack under lifting state

Fig. 3 is the trimmer valve form structure schematic diagram of the hydraulic jack of quarry tipper lifting shown in Fig. 1.

Embodiment

Below in conjunction with drawings and Examples, the invention will be further described.

The present embodiment comprises one-level cylinder barrel 5, and the upper end of one-level cylinder barrel 5 is by the affixed end cap 1 of bolt 9, and described end cap upper end connects with railway carriage by joint shaft bearing 23, the end cap 1 affixed trimmer valve 15 in lower end; Secondary cylinder barrel 6 is movably housed in one-level cylinder barrel 5 and is fixed in the first piston head 11 of secondary cylinder barrel 6 upper ends, three grades of cylinder barrels 7 are movably housed in secondary cylinder barrel 6 and are fixed in the second piston head 4 of three grades of cylinder barrel 7 upper ends, piston rod 8 is housed in described three grades of cylinder barrels 7 and is fixed in the 3rd piston head 3 on piston rod 8 by another bolt 2, described piston rod 8 lower ends are connected with vehicle frame by another joint shaft bearing 24; The center of described piston rod 8 is provided with lift-off pressures oil channel B and is used as the first annular gap L of forced landing pressure oil passage; The first annular gap L is located between lift-off pressures oil channel B outer side wall and piston rod 8 madial walls; Described trimmer valve 15 tops are provided with oil-through hole C, and one-way valve 16 is equipped with in trimmer valve 15 inner chamber bottoms; The closing gap of described one-level cylinder barrel 5 madial walls, end cap 1 lower end, secondary cylinder barrel 6 upper ends, three grades of cylinder barrel 7 upper ends formation is the large chamber A of lifting.Between described trimmer valve 15 outer side walls and lift-off pressures oil channel B madial wall, be provided with the second annular space D.

Described lift-off pressures oil channel B ingress is provided with and prevents that trimmer valve 15 from producing the guide sleeve 22 of deflection while falling.

The profile of described trimmer valve 15 is the multidiameter shaft shape that radius reduces step by step, and trimmer valve from top to bottom radius reduces step by step.

Described secondary cylinder barrel 6 tops are provided with the first lifting oil drainage hole E, are provided with the first buffer cavity H between one-level cylinder barrel 5 and secondary cylinder barrel 6, and the highest buffer position of the first buffer cavity H is higher than the position of offering of the first lifting oil drainage hole E; Described three grades of cylinder barrel 7 tops are provided with the second lifting oil drainage hole F, between secondary cylinder barrel 6 and three grades of cylinder barrels 7, are provided with the second buffer cavity J, and the highest buffer position of the second buffer cavity J is higher than the position of offering of the second lifting oil drainage hole F; Described piston rod 8 tops are provided with the 3rd lifting oil drainage hole G communicating with the first annular gap L, between three grades of cylinder barrels 7 and piston rod 8, are provided with the 3rd buffer cavity K, and the highest buffer position of the 3rd buffer cavity K is higher than the position of offering of the 3rd lifting oil drainage hole G.

The bottom of described one-level cylinder barrel 5 is provided with the first stuffing box gland 25, the bottom of secondary cylinder barrel 6 is provided with the second stuffing box gland 26, the bottom of three grades of cylinder barrels 7 is provided with the 3rd stuffing box gland 27, the madial wall of each stuffing box gland (i.e. the first stuffing box gland 25, the second stuffing box gland 26, the 3rd stuffing box gland 27) is equipped with four grooves, and dust ring 20, the first seal ring 19, the second seal ring 18, the first supporting ring 17 are housed respectively in four grooves.

The outside of the first piston head 11 of described secondary cylinder barrel 6 upper ends has groove, and the second supporting ring 10 is housed in groove.

The outside of the second piston head 4 of described three grades of cylinder barrel 7 upper ends has groove, and the 3rd supporting ring 12 and seal ring 13 are housed in groove.

The outside of described the 3rd piston head 3 has groove, and another seal ring 14 and the 4th supporting ring 21 are housed in groove.

When oil cylinder lifting, lift-off pressures oil is by the flow through one-way valve 16 of trimmer valve 15 bottoms of lift-off pressures oil channel B, when oil is flowed through one-way valve 16 from bottom to top, one-way valve 16 conductings, now, pressure oil enters the large chamber A of lifting, under the effect of oil pressure, make one-level cylinder barrel 5 increase, when the first stuffing box gland 25 of one-level cylinder barrel 5 bottoms is through the first lifting oil drainage hole E during near the first piston head 11 of secondary cylinder barrel 6 upper ends, the first buffer cavity H forms a closed area, oil extraction speed is slowed down, thereby realize first order lifting buffering; Secondary cylinder barrel 6 lifting under the drive of the first stuffing box gland 25 of one-level cylinder barrel 5 bottoms, the second stuffing box gland 26 of secondary cylinder barrel 6 bottoms is through the second lifting oil drainage hole F during near the second piston head 4 of three grades of cylinder barrel 7 upper ends, the second buffer cavity J-shaped becomes a closed area, thereby realizes second level lifting buffering; In like manner, the 3rd stuffing box gland 27 of three grades of cylinder barrel 7 bottoms is through the 3rd lifting oil drainage hole G on piston rod 8 tops during near the 3rd piston head 3, and the 3rd buffer cavity K forms a closed area, thereby realizes third level lifting buffering.

When oil cylinder retraction, lift-off pressures oil channel B becomes the drainback passage of oil cylinder retraction, and the pressure oil of forced landing enters into by the first annular gap L the power retraction that the 3rd buffer cavity K realizes the third level; In like manner, pressure oil enters the second buffer cavity J by the second lifting oil drainage hole F, realizes the power retraction of the second level; One-level cylinder barrel 5 is last retraction under the effect of gravity.Under the effect of guide sleeve 22 that prevents deflection, when the trimmer valve 15 that is fixed in end cap 1 lower end enters in lift-off pressures oil channel B, because the profile of trimmer valve 15 is multidiameter shaft shape, along with trimmer valve 15 progresses in lift-off pressures oil channel B, the second annular space D between trimmer valve 15 outsides and drainback passage B is more and more less, the circulation area of the large chamber A connection of lifting lift-off pressures oil channel B then level diminishes, due to one-way valve 16 cut-offs, fluid in the large chamber A of the lifting one-way valve 16 of can not flowing through from the top down, fluid in the large chamber A of lifting can only flow into by the second annular space D between trimmer valve 15 and piston rod 8 the lift-off pressures oil channel B in piston rod 8, the circulation area that is communicated with lift-off pressures oil channel B along with the large chamber A of lifting then level diminishes, the speed that fluid in the large chamber A of lifting flows into lift-off pressures oil channel B slows down gradually, thereby impel first order cylinder barrel 5 retraction speed to reduce gradually, to reach the object that realizes buffering when oil cylinder falls.

The present invention is set to movably Multi-stage cylinder and can utilizes a plurality of shorter cylinder barrels to realize larger lifting stroke and height, also reduces difficulty of processing and cost simultaneously, has higher practicability and Economy.

Claims (4)

1. a quarry tipper lifting hydraulic jack, comprises one-level cylinder barrel, the affixed end cap in upper end of one-level cylinder barrel, the affixed trimmer valve in end cap lower end; One-level cylinder barrel is in-built to be had secondary cylinder barrel movably and is fixed in the first piston head of secondary cylinder barrel upper end, secondary cylinder barrel is in-built to be had three grades of cylinder barrels movably and is fixed in the second piston head of three grades of cylinder barrel upper ends, in described three grades of cylinder barrels, piston rod is housed and is fixed in the 3rd piston head on piston rod; It is characterized in that, the center of described piston rod is provided with lift-off pressures oil passage and is used as the first annular space of forced landing pressure oil passage, and the first annular space is located between the lift-off pressures oil outer side wall of passage and the madial wall of piston rod; Described trimmer valve top is provided with oil-through hole, and one-way valve is equipped with in the inner chamber bottom of trimmer valve; The closing gap that the upper end of the madial wall of described one-level cylinder barrel, the lower end of end cap, secondary cylinder barrel, the upper end of three grades of cylinder barrels form is the large chamber of lifting; Between the madial wall of the outer side wall of described trimmer valve and lift-off pressures oil passage, be provided with the second annular space.
2. quarry tipper lifting hydraulic jack according to claim 1, is characterized in that, described lift-off pressures oil feeder connection place is provided with the guide sleeve that prevents from producing when trimmer valve from falling deflection.
3. quarry tipper lifting hydraulic jack according to claim 1 and 2, is characterized in that, the profile of described trimmer valve is the multidiameter shaft shape that radius reduces step by step, and trimmer valve from top to bottom radius reduces step by step.
4. quarry tipper lifting hydraulic jack according to claim 1 and 2, it is characterized in that, described secondary cylinder barrel top is provided with the first lifting oil drainage hole, between one-level cylinder barrel and secondary cylinder barrel, be provided with the first buffer cavity, the highest buffer position of the first buffer cavity is higher than the position of offering of the first lifting oil drainage hole; Described three grades of cylinder barrel tops are provided with the second lifting oil drainage hole, between secondary cylinder barrel and three grades of cylinder barrels, are provided with the second buffer cavity, and the highest buffer position of the second buffer cavity is higher than the position of offering of the second lifting oil drainage hole; Described piston rod top is provided with the 3rd lifting oil drainage hole communicating with the first annular space, between three grades of cylinder barrels and piston rod, is provided with the 3rd buffer cavity, and the highest buffer position of the 3rd buffer cavity is higher than the position of offering of the 3rd lifting oil drainage hole.
CN201310691138.6A 2013-12-17 2013-12-17 Lifting hydraulic oil cylinder of mining dump truck CN103671348A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310691138.6A CN103671348A (en) 2013-12-17 2013-12-17 Lifting hydraulic oil cylinder of mining dump truck

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Application Number Priority Date Filing Date Title
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104314917A (en) * 2014-10-10 2015-01-28 北京机械设备研究所 Local synchronization multistage oil cylinder applicable to heavy load
CN105257621A (en) * 2015-10-14 2016-01-20 航天重型工程装备有限公司 Multi-stage lifting cylinder with hydraulic buffer function
CN106015165A (en) * 2016-06-30 2016-10-12 禹州市神运机械有限公司 Multistage hydraulic cylinder
CN106837925A (en) * 2017-03-14 2017-06-13 华中科技大学 A kind of multistage pressure cylinder
CN107387492A (en) * 2017-09-21 2017-11-24 北京航天发射技术研究所 A kind of multistage perpendicular hydraulic cylinder and its way to play for time
CN108119431A (en) * 2017-12-27 2018-06-05 武汉船舶通信研究所(中国船舶重工集团公司第七二二研究所) A kind of telescopic oil cylinder
CN110410381A (en) * 2019-08-14 2019-11-05 北京特种机械研究所 A kind of heavy duty multistage composite telescopic hydraulic cylinder

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5281485A (en) * 1975-12-27 1977-07-07 Shin Meiwa Ind Co Ltd Buffer for multi-stage cylinder
CN201496340U (en) * 2009-08-13 2010-06-02 湘电重型装备股份有限公司 Multi-stage hydraulic cylinder with damping device of mining dumping truck,
JP2011174501A (en) * 2010-02-23 2011-09-08 Kyb Co Ltd Multi-cylinder hydraulic shock absorber
CN102425584A (en) * 2011-12-19 2012-04-25 湘电重型装备股份有限公司 Three-stage hydraulic lifting cylinder of large mining dump truck
CN202348826U (en) * 2011-12-19 2012-07-25 湘电重型装备股份有限公司 Three-stage hydraulic lifting oil cylinder for large-scale mining dump truck
CN203702724U (en) * 2013-12-17 2014-07-09 湘电重型装备有限公司 Lifting hydraulic oil cylinder of mining dumper

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5281485A (en) * 1975-12-27 1977-07-07 Shin Meiwa Ind Co Ltd Buffer for multi-stage cylinder
CN201496340U (en) * 2009-08-13 2010-06-02 湘电重型装备股份有限公司 Multi-stage hydraulic cylinder with damping device of mining dumping truck,
JP2011174501A (en) * 2010-02-23 2011-09-08 Kyb Co Ltd Multi-cylinder hydraulic shock absorber
CN102425584A (en) * 2011-12-19 2012-04-25 湘电重型装备股份有限公司 Three-stage hydraulic lifting cylinder of large mining dump truck
CN202348826U (en) * 2011-12-19 2012-07-25 湘电重型装备股份有限公司 Three-stage hydraulic lifting oil cylinder for large-scale mining dump truck
CN203702724U (en) * 2013-12-17 2014-07-09 湘电重型装备有限公司 Lifting hydraulic oil cylinder of mining dumper

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104314917A (en) * 2014-10-10 2015-01-28 北京机械设备研究所 Local synchronization multistage oil cylinder applicable to heavy load
CN104314917B (en) * 2014-10-10 2016-06-22 北京机械设备研究所 A kind of suitable in heavy duty local synchronization multi-stage oil cylinder
CN105257621A (en) * 2015-10-14 2016-01-20 航天重型工程装备有限公司 Multi-stage lifting cylinder with hydraulic buffer function
CN105257621B (en) * 2015-10-14 2017-08-25 航天重型工程装备有限公司 A kind of multistage load lifting cylinder for possessing hydraulic cushion function
CN106015165A (en) * 2016-06-30 2016-10-12 禹州市神运机械有限公司 Multistage hydraulic cylinder
CN106837925A (en) * 2017-03-14 2017-06-13 华中科技大学 A kind of multistage pressure cylinder
CN107387492A (en) * 2017-09-21 2017-11-24 北京航天发射技术研究所 A kind of multistage perpendicular hydraulic cylinder and its way to play for time
CN108119431A (en) * 2017-12-27 2018-06-05 武汉船舶通信研究所(中国船舶重工集团公司第七二二研究所) A kind of telescopic oil cylinder
CN110410381A (en) * 2019-08-14 2019-11-05 北京特种机械研究所 A kind of heavy duty multistage composite telescopic hydraulic cylinder

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Application publication date: 20140326

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