CN104154164B - A kind of damping oil cylinder for medium-heavy automobile driver's cab turnover - Google Patents

A kind of damping oil cylinder for medium-heavy automobile driver's cab turnover Download PDF

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Publication number
CN104154164B
CN104154164B CN201410357754.2A CN201410357754A CN104154164B CN 104154164 B CN104154164 B CN 104154164B CN 201410357754 A CN201410357754 A CN 201410357754A CN 104154164 B CN104154164 B CN 104154164B
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China
Prior art keywords
oil
main oil
oil gallery
gallery
unidirectional
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Expired - Fee Related
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CN201410357754.2A
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CN104154164A (en
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马哲代
张金强
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Anhui Dehong Work Manufacture Co Ltd
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Anhui Dehong Work Manufacture Co Ltd
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Abstract

The present invention relates to a kind of damping oil cylinder for medium-heavy automobile driver's cab turnover, comprise base (1), base connects cylinder barrel (2), is flexibly connected piston (10), it is characterized in that: be provided with one group of main oil gallery in base in cylinder barrel.First main oil gallery (19) interior sliding connection spool unilaterally connected with it (16); Second main oil gallery (20) interior sliding connection push rod (15); 3rd main oil gallery (21) is connected the second unidirectional stifled ball (17a) and the 3rd unidirectional stifled ball (17b); Be connected in remaining main oil gallery a joint (12) respectively, and cylinder barrel (2) is communicated with base (1) with long oil pipe (5) by short oil pipe (4).Advantage of the present invention: the oil cylinder of this device has float function, realizes the steady upset that operator cabin rises and reclaims, and oil cylinder is all soft contact with truck chassis with operator cabin, abates the noise.

Description

A kind of damping oil cylinder for medium-heavy automobile driver's cab turnover
Technical field
The present invention relates to a kind of upender for Medium or severe type automobile cab, particularly a kind of damping oil cylinder for medium-heavy automobile driver's cab turnover.
Background technique
Medium or severe type automobile, when needs maintenance or service engine, adopts hydraulic system by operator cabin lifting usually so that maintenance or maintenance operation.Present stage in, heavy automobile cab is when carrying out lifting and declining, the rising of operator cabin and callback course are difficult to held stationary upset, and cause vibration sharply, noise is large, when operator cabin climbs over transition point, there is the movement of falling object, when oil cylinder is pulled to the longest by operator cabin because of whereabouts, now operator cabin and oil cylinder bear the enormous impact power produced due to the falling motion of operator cabin simultaneously, operator cabin can be caused after long-term use to be out of shape, tear, the phenomenon that oil cylinder is pulled or breaks, through extensively retrieval, not yet find ideal technological scheme.
Summary of the invention
The object of the invention is to be difficult to held stationary upset in order to solve present stage Medium or severe type automobile in the rising of operator cabin and callback course, impacting the shortcomings such as large, and a kind of damping oil cylinder for medium-heavy automobile driver's cab turnover proposed.
To achieve these goals, present invention employs following technological scheme:
For a damping oil cylinder for medium-heavy automobile driver's cab turnover, comprise base, base connect cylinder barrel, to be connected a piston by piston rod activity in described cylinder barrel, to it is characterized in that:
One group of main oil gallery is provided with in a, described base; First main oil gallery is by the first plugging block shutoff, sliding connection spool unilaterally connected with it in described first main oil gallery, also be connected between described first plugging block and spool a spring, a spool oil duct is provided with in described spool, in described spool oil duct, activity is connected two unidirectional stifled balls, between described two unidirectional stifled balls, be provided with a spring; Second main oil gallery passes through the second plugging block shutoff, sliding connection push rod in described second main oil gallery, and the inner side of described push rod is also by spring and described second main oil gallery corresponding matching; 3rd main oil gallery is by the 3rd plugging block shutoff, and be connected the second unidirectional stifled ball and the 3rd unidirectional stifled ball in described 3rd main oil gallery, between described second unidirectional stifled ball and the 3rd unidirectional stifled ball, be provided with a spring; Also a spring is provided with between the second unidirectional stifled ball and the 3rd plugging block; Be connected in remaining main oil gallery a joint respectively, is equipped with a joint oil duct in described joint, and be all connected a unidirectional stifled ball in joint oil duct, and the joint oil duct side of each described joint is equipped with a throttling oil duct;
The cavity of cylinder barrel is separated into upper cavity and lower chamber by b, described piston, described upper cavity is communicated with described first main oil gallery by short oil pipe, described upper cavity is also communicated with by long oil Guan Yu six main oil gallery, described lower chamber connects oil duct by first and is communicated with described 3rd main oil gallery, and described lower chamber also connects oil duct by second and is communicated with described spool oil duct.
On the basis of technique scheme, following further technological scheme can be had:
Described main oil gallery also comprises the 4th main oil gallery, the 5th main oil gallery, described 4th main oil gallery by first oil duct respectively with the first main oil gallery and the 3rd main oil gallery unilaterally connected; Described second main oil gallery is communicated with described upper cavity by long oil pipe; Described 3rd main oil gallery is also connected oil duct by the 3rd connection oil duct and is communicated with the 5th main oil gallery with the 4th.
Also comprise an oil duct, described push rod is a stepped stem, and the guide rod of push rod front end leads with described second oil duct and coordinates.
Described base with the earrings of piston rod in be all socketed a polyurethane rings pad.
After oil cylinder is installed, piston is in floating zone L section, and between Lx and Ls two limit positions, section of floating downward is L1, and floating section is L2, and when operator cabin is upwards shaken, piston floats, and L2 reduces, and L1 strengthens; When operator cabin is shaken downwards, piston is floated downward, and L2 strengthens, and L1 reduces.
The invention has the advantages that: the oil cylinder of this device has float function, fluctuate along with the shake of operator cabin, rising and the upset of callback course held stationary of operator cabin can be realized, avoid the generation of its sharply oscillation phenomenon, and on base and earrings, polyurethane rings pad is all housed, make oil cylinder be all soft contact with truck chassis with the connection of operator cabin, reduce impact force, abate the noise.
Accompanying drawing explanation
Fig. 1 is basic structure schematic diagram of the present invention;
Fig. 2 is the partial sectional view of Fig. 1;
Fig. 3 is A-A sectional view of Fig. 2;
Fig. 4 is B-B sectional view of Fig. 2;
Fig. 5 is hydraulic schematic diagram of the present invention.
Embodiment
As depicted in figs. 1 and 2, a kind of damping oil cylinder for medium-heavy automobile driver's cab turnover provided by the invention, comprise base 1, base 1 welds a cylinder barrel 2, in described cylinder barrel 2, activity is connected piston rod 3, connect a piston 10 matched with described cylinder barrel 2 in the inner of piston rod 3, it is characterized in that:
Be provided with six main oil gallerys in a, described base 1, be respectively the first main oil gallery 19, second main oil gallery 20, the 3rd main oil gallery 21, the 4th main oil gallery 22, the 5th main oil gallery 23 and the 6th main oil gallery 24.
Shown in b, composition graphs 3 and Fig. 4, the opening of described first main oil gallery 19 is threaded connection the first plugging block 11 shutoff, described first plugging block 11 adopts interior hexagonal screw plug, sliding connection one spool 16 unilaterally connected with it in described first main oil gallery 19, described spool 16 and the first plugging block 11 are all sealed and matched by seal ring and described first main oil gallery 19.Also be connected between described first plugging block 11 and spool 16 spring 18, a spool oil duct 28 is provided with in described spool 16, described spool 16 is provided with a throttling spool hole 29, described spool oil duct 28 is by throttling spool hole 29 and described first main oil gallery 19 unilaterally connected, in described spool oil duct 28, activity is connected two unidirectional stifled balls 17, described two unidirectional stifled balls 17 adopt steel ball, between described two unidirectional stifled balls 17, be provided with a spring;
Shown in c, Fig. 4, when piston 10 is in floating zone L section, described first main oil gallery 19 is communicated with the second main oil gallery 20 by short oil pipe 4, oil duct 33, upper cavity 2a, oil duct 34, long oil pipe 5; The second plugging block 14 shutoff is threaded connection at the opening of described second main oil gallery 20, described second plugging block 14 adopts interior hexagonal screw plug, sliding connection push rod 15 in described second main oil gallery 20, the inner side of described push rod 15 is also by spring and described second main oil gallery 20 corresponding matching; Also comprise an oil duct 27, described push rod 15 is a stepped stem, push rod 15 is provided with annular groove, a guide rod 15a is provided with in the front side of described push rod 15, described guide rod 15a leads with described second oil duct 27 and coordinates, described spring housing is connected on described guide rod 15a, and described second plugging block 14 and push rod 15 are all sealed and matched by seal ring and described second main oil gallery 20.
D, described 3rd main oil gallery 21 is shoulder hole, the 3rd plugging block 13 shutoff is threaded connection at the opening of described 3rd main oil gallery 21, described 3rd plugging block 13 adopts interior hexagonal screw plug, be connected respectively in two apertures a second unidirectional stifled ball 17a and a 3rd unidirectional stifled ball 17b inside described 3rd main oil gallery 21, be connected a spring between described two the second unidirectional stifled ball 17a and the 3rd unidirectional stifled ball 17b, also a spring is provided with between the second unidirectional stifled ball 17a and the 3rd plugging block 13, described 3rd plugging block 13 shutoff is also sealed and matched by seal ring and described 3rd main oil gallery 21.
E, described 4th main oil gallery 22, 5th main oil gallery 23 and the 6th main oil gallery 24 are as shoulder hole, and a joint 12 is all threaded connection in these three main oil gallerys, a joint oil duct 31 run through is equipped with in the centre of each described joint 12, all be connected in hole on front side of described joint oil duct 31 a unidirectional stifled ball 17c, described unidirectional stifled ball 17c can move freely in the hole at its place, the oilhole shutoff that described unidirectional stifled ball 17c is less with described joint oil duct 31 mid diameter coordinates, the side of the oilhole that described joint oil duct 31 mid diameter is less is provided with a throttling oil duct 32, the two ends of described throttling oil duct 32 are all communicated with described joint oil duct 31, also a filter screen is connected respectively at the two ends of described joint oil duct 31.Described 4th main oil gallery 22 is communicated with the 3rd main oil gallery 21 by first oil duct 26, and described 3rd main oil gallery 21 is also connected oil duct 40 by the 3rd connection oil duct 39 with the 4th and is communicated with the 5th main oil gallery 23.
F, described piston 10 is fixed on the front end of piston rod 3 by axle-steel silk back-up ring 38, described piston 10 is also sealed and matched with described cylinder barrel 2 and piston rod 3 respectively by seal ring, the front side of described piston rod 3 is also clamping position limit cycle 37 near the position of piston 10, the opening of described cylinder barrel 2 is connected a cylinder cap 6, described cylinder cap 6 is socketed on piston rod 3, described position limit cycle 37 coordinates with described cylinder cap 6 is spacing, described cylinder cap 6 is connected with cylinder barrel 2 opening, with the spacing cooperation of Steel Cable Baffle Ring 41, described cylinder cap 6 cylindrical and endoporus all have annular groove, be sealed and matched with cylinder barrel 2 opening and piston rod 3 with seal ring.The cavity of cylinder barrel 2 is separated into upper cavity 2a and lower chamber 2b by described piston 10, described upper cavity 2a is communicated with described first main oil gallery 19 by short oil pipe 4, described upper cavity 2a is also communicated with the 6th main oil gallery 24 by long oil pipe 5, described lower chamber 2b connects oil duct 35 by first and is communicated with described 3rd main oil gallery 21, and described lower chamber 2b also connects oil duct 36 by second and is communicated with described spool oil duct 28.
G, described base 1 with the earrings 7 of piston rod 3 in be all socketed a polyurethane rings pad 8, make oil cylinder all form soft contact with truck chassis with the connection of operator cabin, to avoid between steel part collision and produce strong noise.
Working principle
H, shown in composition graphs 5, when oil cylinder lifting operator cabin, now the selector valve of power source oil hydraulic pump is commutated to lifting state, high pressure oil is delivered to fittings body 12 by oil pipe, high pressure oil pushes unidirectional stifled ball 17c open through joint oil duct 31 and throttling oil duct 32, the 3rd main oil gallery 21 and spool oil duct 28 is flowed to respectively again by first oil duct 26, high-pressure oil flow is when spool oil duct 28, spool oil duct 28 seals by the unidirectional stifled ball 17 in the outside in the effect lower valve core 16 of high pressure oil, make spool oil duct 28 stifled disconnected with the first main oil gallery 19, now, high pressure oil can only connect through second the lower chamber 2b that oil duct 36 flows to oil cylinder.Unidirectional for inner side in unidirectional in 3rd main oil gallery 21 two stifled ball 17a and 17b and spool oil duct 28 stifled ball 17 is once pushed open once by high pressure, connects oil duct 35 be connected with second the lower chamber 2b that oil duct 36 flows to oil cylinder through first; Meanwhile, high pressure oil is after flowing through the 3rd main oil gallery 21, and be also connected oil duct 40 by the 3rd connection oil duct 39 with the 4th successively and flow to five main oil gallerys 23, high pressure oil leads to the lower chamber 2b of the auxiliary cylinder of twin-tub system by connected pipes through the 3rd joint 12b; As high pressure oil supply lower chamber 2b, high pressure oil promotes piston 10, drives piston rod 3 to move upward lifting operator cabin.
Now, the 6th main oil gallery 24 is flowed to after the hydraulic oil of upper cavity 2a enters long oil pipe 5 by long oil tube coupling discharge orifice 34, now the second joint 12a is sealed oil duct by the unidirectional stifled ball 17c of its inside, hydraulic oil can only ooze from the second joint 12a after the throttling oil duct 32 of its inside, and the hydraulic oil in upper cavity 2a is drained into the fuel tank of power source oil hydraulic pump by the second joint 12a through oil pipe.
I, when operator cabin regained by oil cylinder, now the selector valve of power source oil hydraulic pump is commutated to retracted state, high pressure oil is delivered to the second joint 12a by oil pipe, high pressure oil flows to the upper cavity 2a of oil cylinder through long oil pipe 5, promoting piston 10 drives piston rod 3 to move downward, simultaneously, also the second main oil gallery 20 is flowed to through the 3rd oil duct 25 successively, high pressure oil will promote push rod 15, under the effect of push rod 15, push the unidirectional stifled ball 17 surveyed in spool 16 open, make the hydraulic oil of lower chamber 2b through spool oil duct 28, the 4th main oil gallery 22 is flowed to from first oil duct 26, now the first joint 12 is sealed oil duct by the unidirectional stifled ball 17c of its inside, hydraulic oil can only ooze from the first joint 12 after the throttling oil duct 32 of its inside, first joint 12 connects power source oil hydraulic pump low pressure oil way by oil pipe, by in hydraulic oil drainage oil sump tank.
J, be in floating zone L section when piston 10, wherein Lx for the lower limit that floats, Ls be float cap, during hydraulic power supply hydraulic pressure air pump inoperative, piston 10 and piston rod 3 assembly, under the effect of operator cabin, can float.When operator cabin by piston rod 3 to stretch out direction pull time, due to now, the structure of reversing valve feature of oil hydraulic pump, cylinder upper cavity oil body 2a is by the oil duct of selector valve, the selector valve of pump of long oil pipe 5, second joint 12a and power source oil hydraulic pump, define locking system, therefore, hydraulic oil in cylinder upper cavity oil body 2a can only flow to the first main oil gallery 19 after short oil tube coupling discharge orifice 33 enters short oil pipe 4, now hydraulic oil flows into the spool oil duct 28 of spool 16 by throttling spool hole 29, then by the lower chamber 2b of piston 10 inspiration oil cylinder after the second connection oil duct 36.Now, due to piston 10 and piston rod 3 protruding, lower chamber 2b will form vacuum trend, if the oil of the upper cavity 2a of oil cylinder can not be supplied in time, then can inhale the unidirectional stifled ball 17 in inner side in valve opening core 16, the oil enough from the inspiration of second oil duct 27 is filled up, and now second oil duct 27 communicates with the fuel tank of pump.When piston rod 3 pushes to direction of recession by operator cabin, hydraulic oil in the lower chamber 2b of oil cylinder connects oil duct 35 through first and flows to the 3rd main oil gallery 21, hole on front side of 3rd main oil gallery 21 is blocked by the unidirectional stifled ball 17 now promoting rear side, hydraulic oil in such lower chamber 2b can only connect from second the side that front oil duct 19a that oil duct 36 flows to the first main oil gallery 19 pushes spool 16 to the first plugging block 11, thus unidirectional stifled ball 17 band inside spool 16 is opened, hydraulic oil flows to the fuel tank of pump through second oil duct 27, thus achieve the float function of piston 10 in oil-tank floating district L section.

Claims (4)

1. for a damping oil cylinder for medium-heavy automobile driver's cab turnover, comprise base (1), base (1) connect cylinder barrel (2), to be connected a piston (10) by piston rod (3) activity in described cylinder barrel (2), to it is characterized in that:
One group of main oil gallery is provided with in a, described base (1); First main oil gallery (19) is by the first plugging block (11) shutoff, the interior sliding connection of described first main oil gallery (19) spool unilaterally connected with it (16), also be connected between described first plugging block (11) and spool (16) spring (18), a spool oil duct (28) is provided with in described spool (16), in described spool oil duct (28), activity is connected two unidirectional stifled balls (17), between described two unidirectional stifled balls (17), be provided with a spring; Second main oil gallery (20) by the second plugging block (14) shutoff, sliding connection push rod (15) in described second main oil gallery (20), the inner side of described push rod (15) is also by spring and described second main oil gallery (20) corresponding matching; 3rd main oil gallery (21) is by the 3rd plugging block (13) shutoff, be connected the second unidirectional stifled ball (17a) and the 3rd unidirectional stifled ball (17b) in described 3rd main oil gallery (21), between described second unidirectional stifled ball (17a) and the 3rd unidirectional stifled ball (17b), be provided with a spring; Also a spring is provided with between the second unidirectional stifled ball (17a) and the 3rd plugging block (13); Be connected in remaining main oil gallery a joint (12) respectively, a joint oil duct (31) is equipped with in described joint (12), all be connected a unidirectional stifled ball (17c) in joint oil duct (31), and joint oil duct (31) side of each described joint (12) is equipped with a throttling oil duct (32);
The cavity of cylinder barrel (2) is separated into upper cavity (2a) and lower chamber (2b) by b, described piston (10), described upper cavity (2a) is communicated with described first main oil gallery (19) by short oil pipe (4), described upper cavity (2a) is also communicated with the 6th main oil gallery (24) by long oil pipe (5), described lower chamber (2b) connects oil duct (35) by first and is communicated with described 3rd main oil gallery (21), and described lower chamber (2b) also connects oil duct (36) by second and is communicated with described spool oil duct (28).
2. a kind of damping oil cylinder for medium-heavy automobile driver's cab turnover according to claim 1, is characterized in that:
Described main oil gallery also comprises the 4th main oil gallery (22), the 5th main oil gallery (23), described 4th main oil gallery (22) by first oil duct (26) respectively with the first main oil gallery (19) and the 3rd main oil gallery (21) unilaterally connected; Described second main oil gallery (20) is communicated with described upper cavity (2a) by long oil pipe (5); Described 3rd main oil gallery (21) is also connected oil duct (40) by the 3rd connection oil duct (39) and is communicated with the 5th main oil gallery (23) with the 4th.
3. a kind of damping oil cylinder for medium-heavy automobile driver's cab turnover according to claim 2, it is characterized in that: also comprise second oil duct (27), described push rod (15) is a stepped stem, and the guide rod (15a) of push rod (15) front end leads with described second oil duct (27) and coordinates.
4. a kind of damping oil cylinder for medium-heavy automobile driver's cab turnover according to claim 1, is characterized in that: described base (1) with the earrings (7) of piston rod (3) in be all socketed a polyurethane rings pad (8).
CN201410357754.2A 2014-07-25 2014-07-25 A kind of damping oil cylinder for medium-heavy automobile driver's cab turnover Expired - Fee Related CN104154164B (en)

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CN201410357754.2A CN104154164B (en) 2014-07-25 2014-07-25 A kind of damping oil cylinder for medium-heavy automobile driver's cab turnover

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CN104154164B true CN104154164B (en) 2015-12-30

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107255091B (en) * 2017-08-16 2019-01-04 实用动力(中国)工业有限公司 A kind of non-differential type truck cap overturning oil cylinder
CN113606221B (en) * 2021-08-13 2022-03-11 安徽德鸿机件制造有限公司 Damping type oil cylinder for driver's cab of medium and heavy truck

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CN101131168A (en) * 2006-08-23 2008-02-27 上海中欧汽车电器有限公司 Safe double-cylinder hydraulic lifting mechanism with force synchronization in internal follow-up section
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CN202251173U (en) * 2011-09-30 2012-05-30 东风汽车公司 Non-differential floating double-cylinder assembly
CN204041833U (en) * 2014-07-25 2014-12-24 安徽德鸿机件制造有限公司 A kind of damping oil cylinder for medium-heavy automobile driver's cab turnover

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JP4901298B2 (en) * 2006-05-17 2012-03-21 三輪精機株式会社 Cabylt equipment

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19730499B4 (en) * 1997-07-16 2005-03-17 Weber-Hydraulik Gmbh Hydraulic tilting device
CN101131168A (en) * 2006-08-23 2008-02-27 上海中欧汽车电器有限公司 Safe double-cylinder hydraulic lifting mechanism with force synchronization in internal follow-up section
CN201148177Y (en) * 2007-11-06 2008-11-12 荆州久阳汽车零部件制造有限公司 Improved single oil path hydraulic type automobile driver's cabin tumbler
CN201553217U (en) * 2009-12-10 2010-08-18 上海中欧汽车电器有限公司 Automobile cab hydraulic reversing device
CN202251173U (en) * 2011-09-30 2012-05-30 东风汽车公司 Non-differential floating double-cylinder assembly
CN204041833U (en) * 2014-07-25 2014-12-24 安徽德鸿机件制造有限公司 A kind of damping oil cylinder for medium-heavy automobile driver's cab turnover

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