CN105465094B - A kind of adjustable throttling of two benches and the hydraulic cylinder of cushion stroke - Google Patents
A kind of adjustable throttling of two benches and the hydraulic cylinder of cushion stroke Download PDFInfo
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- CN105465094B CN105465094B CN201510649694.6A CN201510649694A CN105465094B CN 105465094 B CN105465094 B CN 105465094B CN 201510649694 A CN201510649694 A CN 201510649694A CN 105465094 B CN105465094 B CN 105465094B
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- oil duct
- stroke
- regulating lever
- piston rod
- buffering
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Abstract
There are stroke adjusting device, oil duct three on a kind of adjustable throttling of two benches and the hydraulic cylinder of cushion stroke, including cylinder body, piston rod, piston, in addition to valve block, valve block；Stroke adjusting device includes having oil duct one on stroke regulating lever, control-rod, adjustment seat, the adjusted seat connection stroke regulating lever of control-rod, stroke regulating lever；Be additionally provided with valve block before piston rod end face is contacted with stroke regulating lever be used to enter piston rod the first-level buffer oil duct of row buffering, after piston rod end face is contacted with stroke regulating lever for entering the level 2 buffering oil duct two of row buffering to piston rod；Oil duct is connected once first-level buffer oil duct, loaded on the big throttling valve core on first-level buffer oil duct with oil duct three, and level 2 buffering oil duct two is connected through small throttling valve core with oil duct three.The present invention has simple in construction, delivery-check qualified rate height of product, unqualified recoverable feature.When pressure oil liquid promotes piston rod retraction, the piston rod movement time can be controlled in two stages, and the whole speed of service can adjust.
Description
Technical field
The present invention is the buffer unit hydraulic cylinder of a kind of adjustable throttling of two benches and cushion stroke.
Background technology
At present, the permanent throttling buffering device of known hydraulic cylinder, mainly a kind of cylinder cushion device, specifically a kind of liquid
When cylinder pressure works, pressure oil liquid promotes piston rod to move back and forth, when preventing piston rod movement to bottom, speed, to connection
Equipment plays greater impact, the buffer unit installed in tailpiece of the piston rod, it is impossible to which time when being withdrawn to piston rod is adjusted, and
And prosthetic is not strong.
The content of the invention
It is an object of the invention to overcome the shortcomings of that above-mentioned hydraulic cylinder throttling buffering device is adjustable there is provided a kind of two benches
Throttling and the hydraulic cylinder of cushion stroke, the device can not only realize permanent throttling buffering, and can be according to connection equipment needs pair
Speed of service whole process is adjustable when piston rod is withdrawn, and can be repaired without throttling buffering or during unobvious throttling buffering.
The technical scheme is that：Including cylinder body, piston rod, piston, in addition to the valve block loaded on cylinder base, valve block
It is provided with stroke adjusting device, the oil duct for connecting hydraulic cylinder cavity and external hydraulic system for the regulating piston throw of lever
Three；Stroke adjusting device includes stroke regulating lever, control-rod, adjustment seat, the adjusted seat connection stroke regulating lever of control-rod, stroke
Adjusting rod is provided with oil duct one；Being additionally provided with valve block before piston rod end face is contacted with stroke regulating lever is used to carry out piston rod
The first-level buffer oil duct of buffering, it is used to after piston rod end face is contacted with stroke regulating lever entering piston rod two grades of row buffering and delays
Rush oil duct two；Oil duct is connected once first-level buffer oil duct, loaded on the big throttling valve core on first-level buffer oil duct with oil duct three, and two
Level buffering oil duct two is connected through small throttling valve core with oil duct three.
The piston rod is provided with endoporus, and interior nose end is equipped with the buffering copper sheathing for being used for coordinating stroke regulating lever.
Buffering copper sleeve inner hole and the stroke regulating lever are cylindrical with being combined into interference fits.
The bore depth L of the piston rod is more than stroke regulating lever and stretches out the most long depth of valve block length.
The buffering copper sleeve inner hole end, stroke adjustment boom end are provided with chamfering.The stroke regulating lever is cylindrical with buffering
The endoporus of copper sheathing is fit tolerance h7/H8, and finish is Ra1.6.
The aperture of oil duct one is more than 3 ~ 4 times of the aperture of level 2 buffering oil duct two.
The valve block, which is provided with, to be used to assemble stroke regulating lever, control-rod, the endoporus of adjustment seat, stroke regulating lever it is cylindrical with
The endoporus of valve block is interference fits.Fit tolerance h7/ H8, finish is Ra1.6.
The valve block is provided with the mounting hole for being used for assembling big throttling valve core and small throttling valve core, big throttling valve core and trifle
Flow valve core bottom end face is that circular contact grinding cooperation makes it have sealing with mounting hole.
The oil duct three is equipped with check valve close to hydraulic cylinder cavity end.The effect of check valve is to prevent hydraulic oil from being flowed from cylinder body
Enter external hydraulic system.
The adjustment seat end dress pad, adjustment seat is fixed by screw thread with cylinder bottom valve block, and control-rod passes through screw thread and stroke
Adjusting rod is connected.
Hydraulic cylinder bottom valve block is provided with the level 2 buffering oil duct two connected by small throttling valve core and hydraulic fluid port（Abbreviation oil duct
Two）, this hole of oil duct two is less than the above-mentioned hole of oil duct one.Oil duct two is connected through entering oil road three with hydraulic system.In stroke adjustment
When bar is not contacted with copper sheathing inner peripheral wall, hydraulic oil is mainly run by the oil duct one of big throttle valve control, passes through the big section of regulation
Flow valve core control hydraulic fluid flow rate, and then control stroke regulating lever piston rod operation speed when not contacted with copper sheathing inner peripheral wall
Degree.After stroke regulating lever is contacted with copper sheathing inner peripheral wall, the oil pocket that stroke regulating lever outer wall is formed with cylinder barrel inner peripheral wall
The operation of oil duct two that interior hydraulic oil is controlled by small throttling valve core, hydraulic fluid flow rate is controlled by adjusting small throttle valve core,
And then control the piston rod speed of service.Oil duct three is located at cylinder bottom valve block inner face, is passed through provided with fluid when preventing that piston rod from withdrawing
This oil duct three flows into the check valve of external hydraulic system；Stroke regulating lever angle head cylindrical be provided be used for buffering copper sheathing front end face,
Buffer the conical surface of copper sheathing inner peripheral surface formation ring-type oil passage；Stroke regulating lever rear end face is provided with the fluid being connected with hydraulic fluid port
Passage with connect stroke regulating lever not with buffering copper sheathing inner peripheral wall contact when oil duct one.
Compared with prior art, the present invention have simple in construction, product easy processing, delivery-check qualified rate height of product, no
Qualified recoverable feature.When pressure oil liquid promotes piston rod retraction movement, when can be divided into two-stage control piston rod movement
Between, the whole speed of service can adjust.
Brief description of the drawings
Fig. 1 is one of structural representation of the present invention.（Piston rod movement is to middle part state）.
Fig. 2 is the two of the structural representation of the present invention.（Piston rod movement contacts shape to stroke regulating lever with buffering copper sheathing
State）.
Fig. 3 is the structural representation of stroke regulating lever.
Fig. 4 is piston rod and the structural representation and sectional view of buffering copper sheathing assembling.
Fig. 5 is control-rod, valve block, the assembling schematic diagram of stroke regulating lever.
Fig. 6 is Fig. 5 A to structural representation.
Fig. 7 is Fig. 5 B-B cut-away views.
Fig. 8 is Fig. 5 C-C cut-away views.
Fig. 9 is Fig. 5 D-D cut-away views.
Figure 10 is Fig. 5 E-E cut-away views.
Figure 11 is Fig. 5 F-F cut-away views.
Figure 12 is Fig. 5 G-G cut-away views.
Figure 13 is Fig. 5 upward view.
Figure 14 is Figure 13 A-A cut-away views.
Embodiment
In Fig. 1,2, the present invention includes cylinder body 10, piston rod 9, valve block 4, loaded on the stroke regulating lever 6 in valve block 4, control
Bar 1, adjustment seat 2, pad 3, check valve 5, big throttling valve core 12, small throttling valve core 13, loaded on the buffering copper sheathing 7 in piston rod 9.It is living
Plug 8 is arranged on neat with end face on piston rod 9, and side pole center is provided with for coordinating with stroke regulating lever 6 before piston rod 9
In hole, endoporus of the buffering copper sheathing 7 loaded on the front end of piston rod 9.Buffering copper sheathing 7 is pressed into piston rod 9 by forced fit tolerance
Connection, holding screw is called the roll in the morning, the length when bore depth of piston rod 9 adjusts most long more than stroke regulating lever 6.Equipped with use on valve block 4
In the stroke regulating lever 6 with buffering the inner hole of copper sheathing 7.Valve block 4 is placed on tune provided with control-rod 1 and adjustment seat 2, control-rod 1
Save in seat 2, the end of adjustment seat 2 dress pad 3, adjustment seat 2 and control-rod 1 are fixed by screw thread with valve block 4, allow control-rod 1 certainly
By rotating, control-rod 1 is connected by screw thread with stroke regulating lever 6, and adjusting stroke regulating lever 6 by pivoting lever 1 stretches out valve
The distance of the length of the bottom of block 4, control hydraulic cylinder first stage and second stage buffering.Big throttling valve core 12 and small on valve block 4
Throttling valve core 13 is connected by screw thread with cylinder bottom valve block 4, respectively by the big throttling valve core 12 of clockwise and rotate counterclockwise and small
Throttling valve core 13, by the gap length of big throttling valve core 12 and the bottom of small throttling valve core 13 and valve block 4 and then controls flow big
It is small.
Wherein, the cylindrical endoporus with buffering copper sheathing 7 of stroke regulating lever 6 is fit dimension h7/H8, and finish is Ra1.6.
The cylindrical endoporus with valve block 4 of stroke regulating lever 6 is interference fits.Fit tolerance h7/ H8, finish is Ra1.6.Stroke is adjusted
The external diameter of pole 6 is less than the aperture of buffering copper sheathing 7.Valve block 4, which is provided with, to be used to assemble big throttling valve core 12 and small throttling valve core 13
Mounting hole, big throttling valve core 12 and the bottom end face of small throttling valve core 13 are that circular contact grinds cooperation with mounting hole, are made it have
Sealing.
Drive piston rod 9 and buffering copper sheathing 7 to during valve 4 end motion of block in piston 8, the end face of piston rod 9 and buffering copper sheathing 7 are not
When being contacted with stroke regulating lever 6（Such as Fig. 1）, hydraulic oil mainly returns to hydraulic fluid port 18 by oil duct 1 through excessive throttling valve core 12,
By adjusting the elastic control flow of big throttling valve core 12, regulating piston 8 drives piston rod 9 and buffers the first stage of copper sheathing 7
The speed of service.
When external pressure fluid is transported jointly by the oil duct 4 17 of guide sleeve 11 promotion piston 8, buffering copper sheathing 7 and piston rod 9
It is dynamic, when buffering copper sheathing 7 enters 6 conical surface 6-1 of stroke regulating lever, seal, oil duct 1 is closed, fluid is entered by cylinder body 10
Enter to enter oil road 3 14 through too small throttling valve core 13 after oil duct 2 16 and return to hydraulic system, by adjusting small throttling valve core 13
The effect of throttling buffering is reached, if buffering effect is undesirable, part can individually be repaired, reach buffer requirements.
Drive piston rod 9 and buffering copper sheathing 7 to during valve 4 end motion of block in piston 8, the bottom of piston rod 9 buffering copper sheathing 7 is with going
After journey adjusting rod 6 is contacted（Such as Fig. 2）, the closing of oil duct 1, hydraulic oil is mainly by the oil duct 2 16 on valve block 4 by small throttling
Valve element 13 returns to hydraulic fluid port 18, and by adjusting the elastic control flow of small throttling valve core 13, regulating piston 8 drives piston rod 9 and slow
Rush the speed of service of the second stage of copper sheathing 7.
Because the speed of service is faster than second stage when first stage is run, when oil duct 1 is closed, hydraulic oil mainly passes through
Oil duct 2 16 on cylinder bottom valve block 4 returns to hydraulic fluid port 18 by small throttling valve core 13.Adjust first stage and second stage buffering length
The short control-rod 1 by adjusting cylinder bottom valve block is obtained, and lever for adjusting oil 1 when clockwise, first stage piston 8, piston rod 9 are run
Time shortens, on the contrary then accelerate；Big throttling valve core 12 is adjusted when clockwise, flow diminishes, and first stage piston 8, piston rod 9 are transported
The row time is slack-off, on the contrary then accelerate；Small throttling valve core 13 is adjusted clockwise, flow diminishes, second stage piston 8, piston rod 9 are transported
The row time is slack-off, on the contrary then then accelerate.
In Fig. 3, buffer unit includes buffering copper sheathing 7, the stroke regulating lever 6 on cylinder body valve block 4, big throttling valve core
12 and small throttling valve core 13.Buffering copper sleeve inner hole is cylindrical with interference fits are combined into stroke regulating lever 6, and fit tolerance is H8/h7.
It is cylindrical that conical surface 6-1 is opened in stroke regulating lever 6.In figure, R=5, a=4 ~ 5, e=20o.
In Fig. 4, buffering copper sheathing 7 is arranged in the hole of piston rod 9, and the endoporus of piston rod 9 is deeper than stroke regulating lever 6 and stretches out cylinder bottom valve
The longest distance of block 4, conical surface 7-1 is opened in the buffering endoporus of copper sheathing 7, figure, R=5, a=4 ~ 5, e=20o.
In Fig. 5-14, stroke regulating lever 6, big throttling valve core 12 and small throttling valve core 13, control-rod 1, adjustment seat and unidirectional
Valve 6 is arranged on valve block 4.The rear end face of 4 internal oil channel of cylinder bottom valve block 3 14 is connected provided with hydraulic fluid port 18 with hydraulic system, front end face dress
Check valve 5.Check valve 5 is directly connected with hydraulic fluid port 18, and the effect of check valve 5 is to prevent hydraulic oil from flowing into external hydraulic from cylinder body
System.Stroke regulating lever 6 is provided with adjusts the oil that flow is connected through first-level buffer oil duct and hydraulic fluid port 18 by big throttling valve core 12
Road 1, oil duct 1 is connected through entering the hydraulic fluid port 18 of oil road 3 14 with hydraulic system, and valve block 4, which is provided with, passes through small choke valve
Core 13 connects the oil duct 2 16 for the hydraulic fluid port 18 and cylinder body 10 being connected with hydraulic system.
Hydraulic oil running route into oil duct 2 16 is：24 it is the pars intermedia of oil duct two, 23 is the entrance of oil duct two, 25
The inlet portion 23 of oil duct 2 16, small throttling valve core 13, pars intermedia 24, outlet are sequentially passed through for the outlet of oil duct two, i.e. hydraulic oil
25 reach hydraulic fluid port 18（Such as Fig. 7,14）.
Hydraulic oil running route into oil duct 1 is：20th, 21 be first-level buffer oil duct, 19 be oil duct one entrance,
22 be inlet portion 19, big throttling valve core 12, the first-level buffer oil that the outlet of oil duct one, i.e. hydraulic oil sequentially pass through oil duct 1
Road, outlet 22 reach hydraulic fluid port 18（Such as Fig. 8,14）.
Claims (7)
1. a kind of adjustable throttling of two benches and the hydraulic cylinder of cushion stroke, including cylinder body（10）, piston rod（9）, piston（8）,
It is characterized in that：Also include the valve block loaded on cylinder base（4）, valve block（4）Being provided with is used for regulating piston bar（9）The row of stroke
Journey adjusting means, the oil duct three for connecting hydraulic cylinder cavity and external hydraulic system（14）；
The piston rod（9）Endoporus is provided with, interior nose end is equipped with the buffering copper sheathing for being used for coordinating stroke regulating lever（7）；
The oil duct three（14）Check valve is housed close to hydraulic cylinder cavity end（5）；
Stroke adjusting device includes stroke regulating lever（6）, control-rod（1）, adjustment seat（2）, control-rod（1）Adjusted seat（2）Even
Connect stroke regulating lever（6）, stroke regulating lever（6）It is provided with oil duct one（15）；
Valve block（4）On be additionally provided with and work as piston rod（9）End face and stroke regulating lever（6）It is used to enter row buffering to piston rod before contact
First-level buffer oil duct, work as piston rod（9）End face and stroke regulating lever（6）Be used to enter piston rod row buffering after contact two grades delay
Rush oil duct two（16）；Oil duct one（15）Through first-level buffer oil duct, loaded on the big throttling valve core on first-level buffer oil duct（12）With oil
Road three（14）It is connected, level 2 buffering oil duct two（16）Through small throttling valve core（13）With oil duct three（14）It is connected；
The oil duct one（15）Aperture is more than level 2 buffering oil duct two（16）3 ~ 4 times of aperture；
Level 2 buffering oil duct two is connected through oil duct three with hydraulic system；Do not connect in stroke regulating lever with buffering copper sheathing inner peripheral wall
When touching, hydraulic oil is mainly run by the oil duct one of big throttle valve control, and hydraulic oil stream is controlled by adjusting big throttle valve core
Amount, and then control stroke regulating lever not with buffering piston rod speed of service when copper sheathing inner peripheral wall is contacted；Stroke regulating lever with
Buffer after the contact of copper sheathing inner peripheral wall, the hydraulic oil in oil pocket that stroke regulating lever outer wall is formed with cylinder barrel inner peripheral wall passes through
The level 2 buffering oil duct two of small throttling valve core control is run, and controls hydraulic fluid flow rate by adjusting small throttle valve core, and then control
The piston rod speed of service processed；Oil duct three is located at cylinder bottom valve block inner face, provided with fluid when preventing that piston rod from withdrawing through this oil duct
Three flow into the check valve of external hydraulic system；Stroke regulating lever angle head cylindrical, which is provided with, to be used for and buffering copper sheathing front end face, buffering copper
Cover the conical surface of inner peripheral surface formation ring-type oil passage；Stroke regulating lever rear end face be provided with the oil passage that is connected with hydraulic fluid port with
Oil duct one when connection stroke regulating lever is not contacted with buffering copper sheathing inner peripheral wall.
2. the adjustable throttling of two benches according to claim 1 and the hydraulic cylinder of cushion stroke, it is characterised in that：It is described slow
Rush copper sheathing（7）Endoporus and stroke regulating lever（6）It is cylindrical with being combined into interference fits.
3. the adjustable throttling of two benches according to claim 1 and the hydraulic cylinder of cushion stroke, it is characterised in that：The work
Stopper rod（9）Bore depth L be more than stroke regulating lever（6）Stretch out valve block（4）Length.
4. the adjustable throttling of two benches according to claim 1 and the hydraulic cylinder of cushion stroke, it is characterised in that：It is described slow
Rush copper sheathing（7）Interior bore ends, stroke regulating lever（6）End is provided with chamfering.
5. the adjustable throttling of two benches according to claim 1 and the hydraulic cylinder of cushion stroke, it is characterised in that：The valve
Block（4）Being provided with is used to assemble stroke regulating lever（6）, control-rod（1）, adjustment seat（2）Endoporus, stroke regulating lever（6）It is cylindrical
With valve block（4）Endoporus be interference fits.
6. the adjustable throttling of two benches according to claim 1 and the hydraulic cylinder of cushion stroke, it is characterised in that：The valve
Block（4）Being provided with is used to assemble big throttling valve core（12）With small throttling valve core（13）Mounting hole, big throttling valve core（12）With it is small
Throttling valve core（13）Bottom is that circular contact grinds cooperation with mounting hole.
7. the adjustable throttling of two benches according to claim 1 and the hydraulic cylinder of cushion stroke, it is characterised in that：It is described to adjust
Save seat（2）End dress pad（3）, adjustment seat（2）Pass through screw thread and cylinder bottom valve block（4）It is fixed, control-rod（1）Pass through screw thread and stroke
Adjusting rod（6）Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510649694.6A CN105465094B (en) | 2015-10-10 | 2015-10-10 | A kind of adjustable throttling of two benches and the hydraulic cylinder of cushion stroke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510649694.6A CN105465094B (en) | 2015-10-10 | 2015-10-10 | A kind of adjustable throttling of two benches and the hydraulic cylinder of cushion stroke |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105465094A CN105465094A (en) | 2016-04-06 |
| CN105465094B true CN105465094B (en) | 2017-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510649694.6A Active CN105465094B (en) | 2015-10-10 | 2015-10-10 | A kind of adjustable throttling of two benches and the hydraulic cylinder of cushion stroke |
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| CN (1) | CN105465094B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402084A (en) * | 2016-10-30 | 2017-02-15 | 马鞍山市裕华机械制造有限公司 | Double-acting hydraulic cylinder with travel-adjustable buffer plunger |
| CN107288952A (en) * | 2017-08-08 | 2017-10-24 | 常州液压成套设备厂有限公司 | External regulation type stroke buffers servomotor |
| CN115195861B (en) * | 2022-08-12 | 2023-09-12 | 浙江极氪智能科技有限公司 | Toe-in adjusting device and vehicle |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE467424B (en) * | 1990-11-09 | 1992-07-13 | Mecman Ab | DEVICE FOR ABSORPTION ATTRACTION AND SPEED CONTROL OF A MOVEMENT OF A PISTON IN A PRESSURE CYLINDER |
| DE102004012083A1 (en) * | 2004-03-12 | 2005-09-29 | Bosch Rexroth Teknik Ab | Pressure cylinder |
| CN201621130U (en) * | 2010-03-04 | 2010-11-03 | 合肥市力恒科技有限责任公司 | Single-acting piston type buffering hydraulic oil cylinder |
| CN202659614U (en) * | 2012-04-11 | 2013-01-09 | 常州轩达液压机电设备有限公司 | Hydraulic cylinder with adjustable buffer length |
| CN202560686U (en) * | 2012-05-29 | 2012-11-28 | 常州海宏液压设备有限公司 | Long-stroke buffering cylinder |
| CN203500176U (en) * | 2013-09-30 | 2014-03-26 | 湖北江山液压科技有限公司 | Constant-throttling adjustable buffering device of hydraulic cylinder |
| CN103573749B (en) * | 2013-11-04 | 2016-04-06 | 湖南特力液压有限公司 | Buffering hydraulic cylinder |
| CN205013435U (en) * | 2015-10-10 | 2016-02-03 | 湖北江山液压科技有限公司 | Adjustable throttle of two stages and cushion stroke's pneumatic cylinder |
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- 2015-10-10 CN CN201510649694.6A patent/CN105465094B/en active Active
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Effective date of registration: 20200715 Address after: 441004 Lianhua Road, Nissan Industrial Park, Xiangyang hi tech Zone, Hubei Province, No. 1 Patentee after: HUBEI JIANGSHAN HEAVY INDUSTRIES Co.,Ltd. Address before: 441004 No. 1 Lianhua Road, Nissan Industrial Park, hi tech Zone, Hubei, Xiangfan Patentee before: HUBEI JIANGSHAN HYDRAULIC TECHNOLOGY Co.,Ltd. |
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Address after: 441057 No.5, zhuiri Road, high tech Zone, Xiangyang City, Hubei Province Patentee after: China Ordnance Industry Group Jiangshan Heavy Industry Research Institute Co.,Ltd. Address before: 441004 No.1, Lianhua Road, Nissan Industrial Park, high tech Zone, Xiangyang City, Hubei Province Patentee before: HUBEI JIANGSHAN HEAVY INDUSTRIES Co.,Ltd. |
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