CN109854564A - A kind of bitubular clamping structure hydraulic support cylinder - Google Patents
A kind of bitubular clamping structure hydraulic support cylinder Download PDFInfo
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- CN109854564A CN109854564A CN201811468359.6A CN201811468359A CN109854564A CN 109854564 A CN109854564 A CN 109854564A CN 201811468359 A CN201811468359 A CN 201811468359A CN 109854564 A CN109854564 A CN 109854564A
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- collet chuck
- cylinder
- hydraulic support
- interior
- extension bar
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims description 43
- 239000007788 liquid Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000008602 contraction Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The present invention provides a kind of bitubular clamping structure hydraulic support cylinder, it includes cylinder barrel, cylinder barrel, extension bar, interior collet chuck, outer collet chuck and lower cylinder seat, the inside of cylinder barrel is arranged in cylinder barrel, extension bar is fixed on the center of cylinder barrel, lower end outside of the interior drum jacket in extension bar, outer collet chuck is arranged in the outside of interior collet chuck, the inner wall of the outer wall of interior collet chuck and outer collet chuck is taper, there is parallel conical surface gap between interior collet chuck and outer collet chuck, external conical sleeve is provided on the outside of outer collet chuck, interior collet chuck is placed with multiple steel balls in conical surface gap parallel with outer collet chuck；The upper end of multiple steel balls carries out axially position by interior collet chuck and outer collet chuck top edge, and the lower end of multiple steel balls carries out axially position by means of a upper press ring set.Hydraulic support cylinder of the invention can significantly increase support force, and the difficulty of processing of hydraulic support cylinder is reduced by the change of structure, improves the service performance of hydraulic support cylinder.
Description
Technical field
The present invention relates to machine tool fixture technical fields, more particularly to a kind of bitubular clamping structure hydraulic support cylinder.
Background technique
Hydraulic support cylinder belongs to one kind of machine tool fixture, and main function is: being carried out in a manner of hydraulic-driven to workpiece
It supports and fixes, is a kind of higher Hydraulic Elements of technology content.Due to the characteristic of hydraulic support cylinder itself, carried out to workpiece
Cutting vibration of the workpiece in being processed can be mitigated while fixed support again, prevent workpiece from deforming because of unbalance stress, institute
The machining accuracy and quality of workpiece can be greatly improved with the use of hydraulic support cylinder.
This hydraulic support cylinder is broadly divided into three movements at work: first, extending action；Second, holding movement；Three,
Homing action.Wherein extending action is to complete location action to contact shoring with workpiece；Holding movement is by hydraulic
Cylinder interior structure holds extension bar tightly, generates support force by the friction to extension bar, reduces deformation and vibration of the workpiece in processing
It is dynamic；Homing action is after the completion of work pieces process, and by oil pressure off-load, extension bar returns to initial position；Wherein holding, which acts, is
Determine the key operations of working performance.
Hydraulic support cylinder on the market at present, generallys use the structure of press-down type piston and monotubular folder, and enclasping force is main
Depending on push piston and collet chuck cone angle size, can hold tightly depend primarily on push piston stroke it is whether enough.To upper
The analysis for stating hydraulic support cylinder finds this structure of position precision and cone angle precision have the disadvantage in that to(for) collet chuck and piston
It is required that especially high, collet chuck and the too big then power transmission angle of the cone angle for pushing piston reduce, and angle is too small, pushes piston dropping distance
Deficiency can not be held tightly completely, position there are deviation will lead to can not hold tightly or original state under extension bar held tightly, this knot
Structure is more demanding to part processing precision, while also limiting further increasing for shoring support force.
Summary of the invention
In view of the above technical problems, the purpose of the present invention is to propose to a kind of bitubular clamping structure hydraulic support cylinder, pass through creation
A kind of new bitubular clamping structure out can increase exponentially support force, increase outer collet chuck and move up stroke, reduce machining accuracy, mention
The service performance of high hydraulic support cylinder.
Specifically, the present invention provides a kind of bitubular clamping structure hydraulic support cylinder comprising cylinder body, cylinder barrel, extension bar, inner cylinder
The inside of the cylinder body is arranged in folder, outer collet chuck and lower cylinder seat, the cylinder barrel, and the extension bar is fixed in the cylinder barrel
Heart position, for the interior drum jacket in the lower end outside of extension bar, the outer collet chuck, the inner cylinder is arranged in the outside of the interior collet chuck
The axial direction of folder and the outer collet chuck, which opens up, to be had the gap, and the inner wall of the outer wall of the interior collet chuck and the outer collet chuck is cone
Shape has parallel conical surface gap between the interior collet chuck and outer collet chuck, external conical sleeve is provided on the outside of the outer collet chuck, described interior
Collet chuck is placed with multiple steel balls in conical surface gap parallel with the outer collet chuck；The upper end of the multiple steel ball is by interior collet chuck and outside
The upper rim of collet chuck carries out axially position, and the lower end of multiple steel balls carries out axially position by means of a upper press ring set.
Preferably, sealing ring is separately installed between the upper press ring set and ladder bushing and between external conical sleeve.
Preferably, the upper surface of the outer collet chuck is equipped with spring base, and spring base and cylinder barrel top are equipped with reset spring,
Sleeve is installed between interior collet chuck and cylinder barrel.
Preferably, dustband is installed, the top of the extension bar is equipped with collision spiral shell between the extension bar and cylinder barrel
Nail, is equipped with sealing ring, is equipped between the lower cylinder seat and ladder bushing close between the collision screw and the extension bar
Seal.
Preferably, it is provided with sealing shroud below the external conical sleeve, between the sealing shroud and external conical sleeve and the sealing
Sealing ring is separately installed between set and the cylinder barrel.
Preferably, corrugated gasket is installed between the sealing shroud and lower cylinder seat.
Preferably, check ring is housed, it is axial fixed that the check ring is used to carry out the lower cylinder seat on the cylinder barrel
Position is equipped with supporting pad below the lower cylinder seat, is equipped with sealing ring between the supporting pad and cylinder barrel, under the supporting pad
Side is equipped with sealing ring.
Preferably, piston rod is installed in the centre bore of the lower cylinder seat, is equipped between the piston rod and lower cylinder seat
Sealing ring is equipped with piston rod spring between the piston rod and lower cylinder seat top.
Preferably, nut is installed in the extension bar inner hole, extension bar bullet is housed between the nut and collision screw
Spring.
Preferably, the lower cylinder seat eccentric part of the cylinder body offers threaded hole, is equipped with screw at the threaded hole, passes through
The uninterrupted passed through can be adjusted by adjusting position of the screw in threaded hole, to adjust the time of hydraulic cylinder holding.
Compared with prior art, the invention has the following advantages that
1. the present invention uses interior collet chuck and outer collet chuck bitubular clamping structure, two tapered gaps are formed with external conical sleeve, in outer cylinder
During the upper pressure of folder, two gaps reduce simultaneously, and under the action of steel ball, since external conical sleeve is fixed, outer collet chuck and interior collet chuck are same
When shrink, so that interior collet chuck is bigger compared to the shrinkage of Normal hydraulic shoring on the market in one timing of outer collet chuck climb,
The moving distance of outer collet chuck is reduced, to reduce machining accuracy, reduces difficulty of processing.
2. the present invention can be while guaranteeing outer collet chuck slippage, the method by reducing angle of taper significantly increases
The support force of hydraulic support cylinder improves the service performance of hydraulic support cylinder.
Detailed description of the invention
Fig. 1 is original state structural schematic diagram of the invention；
Fig. 2 is action state structure and its oil liquid flow schematic diagram of the invention；
Fig. 3 is interior collet chuck structure schematic diagram of the invention；And
Fig. 4 is outer collet chuck structure schematic diagram of the invention.
Wherein, appended drawing reference: 1- collides screw, 3- extension bar, 4- dustband, 5- reset spring, 6- abutment sleeve, 7- bullet
Spring abutment, 8- steel ball, 9- cylinder barrel, 13- screw, 14- check ring, 17- supporting pad, 19- piston rod, 20- piston rod spring, 21-
Lower cylinder seat, 22- corrugated gasket, 24- sealing shroud, 26- ladder bushing, 27- upper press ring set, the outer collet chuck of 28-, collet chuck in 29-, 30-
External conical sleeve, 31- nut, 32- extension bar spring, 2- sealing ring, 10- sealing ring, 11- sealing ring, 12- sealing ring, 15- sealing
Circle, 16- sealing ring, 18- sealing ring, 23- sealing ring, 25- sealing ring, cylinder seat centre bore under 101-, cylinder seat threaded hole under 102-,
103- upper press ring covers oil pocket, 104- supporting pad centre bore.
Specific embodiment
Below with reference to the attached drawing exemplary embodiment that the present invention will be described in detail, feature and aspect.It is identical attached in attached drawing
Icon note indicates element functionally identical or similar.Although the various aspects of embodiment are shown in the attached drawings, unless special
It does not point out, it is not necessary to attached drawing drawn to scale.
In the description of the present invention, it is to be understood that, term " radial direction ", " axial direction ", "upper", "lower", "top", "bottom",
The orientation or positional relationship of the instructions such as "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of retouching
It states the present invention and simplifies description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific
Orientation construction and operation, therefore be not considered as limiting the invention.In the description of the present invention, unless otherwise indicated,
The meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation " " is set
Set ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
It, can also be indirectly connected through an intermediary to be to be connected directly.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
As shown in Figure 1, the present invention provides a kind of bitubular clamping structure hydraulic support cylinder, for increasing enclasping force, including cylinder body,
The inside of cylinder body is arranged in extension bar 3, cylinder barrel 9, interior collet chuck 29, outer collet chuck 28 and lower cylinder seat 21, cylinder barrel 9.Wherein extension bar 3
The center of cylinder barrel 9 is radially positioned at by pilot sleeve 6.
Lower end outside of 29 sets of the interior collet chuck in extension bar 3, the outside of interior collet chuck 29 are outer collet chuck 28, the outer wall of interior collet chuck 29
Inner wall with outer collet chuck 28 is taper, has parallel conical surface gap between interior collet chuck 29 and outer collet chuck 28.
There is external conical sleeve 30 on the outside of outer collet chuck 28, many steel balls 8 is placed in parallel conical surface gap, the upper end of steel ball 8 is by interior
Collet chuck 29 and 28 top edge of outer collet chuck carry out axially position, and the lower end of steel ball 8 carries out axially position by upper press ring set 27；Upper press ring
Sealing ring 11 is installed between set 27 and ladder bushing 26, sealing ring 10 is installed between upper press ring set 27 and external conical sleeve 30.
Outer 28 upper surface of collet chuck is equipped with spring base 7, and spring base and 9 top of cylinder barrel are equipped with reset spring 5, interior collet chuck 29
Abutment sleeve 6 is installed between cylinder barrel 9；6 top of abutment sleeve, is equipped with dustband 4 between extension bar 3 and cylinder barrel 9.
3 top of extension bar is equipped with collision screw 1, collides and is equipped with sealing ring 2 between screw 1 and extension bar 3.Lower cylinder seat
Sealing ring 25 is installed between 21 and ladder bushing 26.
It is sealing shroud 24 below external conical sleeve 30, there is sealing ring 12 between sealing shroud 24 and external conical sleeve 30, pacifies between cylinder barrel 9
Equipped with sealing ring 23.
Corrugated gasket 22 is installed between sealing shroud 24 and lower cylinder seat 21；Equipped with check ring 14 under above-mentioned on cylinder barrel 9
Cylinder seat 21 carries out axially position；There is supporting pad 17 below lower cylinder seat 21.
Sealing ring 15 is installed between above-mentioned supporting pad 17 and cylinder barrel 9, sealing ring 16 is installed below supporting pad；Lower cylinder seat
Piston rod 19 is housed in centre bore 101；Sealing ring 18 is housed, in piston rod 19 and lower cylinder seat between piston rod 19 and lower cylinder seat 21
Piston rod spring 20 is installed between portion.
Nut 31 is installed in extension bar inner hole；Extension bar spring 32 is housed between above-mentioned nut 31 and collision screw 1；On
It states lower 21 eccentric part of cylinder seat and opens threaded hole 102, screw 13 is installed, it, can be with by adjusting position of the screw 13 in threaded hole
The uninterrupted passed through is adjusted, and then adjusts the time that hydraulic cylinder is held tightly.
Oil liquid enters lower cylinder seat centre bore 101 by supporting pad centre bore 104, and piston rod 19 is pushed to move upward to lower cylinder
Stop at the interior step of seat.
At the same time, nut 31 compresses the drive extension bar 3 of extension bar spring 32 and stretches out, when colliding 1 contact workpiece of screw
Stop.
Later, oil liquid is by lower cylinder seat threaded hole 102, under the flow adjustment effect of screw 13, covers oil into upper press ring
In chamber 103, under the action of oil pressure, upper press ring set 27 is moved up, and outer collet chuck 28 is pushed to move up.
During outer collet chuck 28 moves up, all due to the gap between outer collet chuck 28 and external conical sleeve 30 and interior collet chuck 29
It can reduce, but since steel ball 8 is filled with gap, so interior collet chuck 29 and outer collet chuck 28 can generate contraction simultaneously, to hold tightly
Extension bar 3 completes holding movement.
After oil pressure off-load, outer collet chuck 28 moves down reset under the action of reset spring 5, push upper press ring set 27 until
Stop after touching the ladder of ladder bushing 26.
At the same time, outer collet chuck 28 increases with the gap of interior collet chuck 29 and external conical sleeve 30, and interior collet chuck 29 and outer collet chuck 28 exist
Radial dilatation resets under the action of natural resiliency, unclamps extension bar.
Piston rod 19 resets downwards under the action of piston rod spring 20, drives extension bar 3 to move down by nut 31,
Return to initial position.
It is illustrated in figure 2 configuration state and oil liquid flow regime schematic diagram of the hydraulic support cylinder of the present invention after holding,
Blacking part is oil liquid position in figure, and interior collet chuck 29 in structure, outer collet chuck 28 and correlated parts collectively constitute bitubular clamping structure.
During upper press ring set 27 is moved up by the effect of oil pocket oil pressure, outer collet chuck 28 moves up therewith, outside
28 two sides tapered gaps of collet chuck reduce simultaneously, and due to the constraint by external conical sleeve 30, external conical sleeve 30 makes outer cylinder by 8 power transmission of steel ball
Folder 28 generates radial contraction, and outer collet chuck 28 compresses interior collet chuck 29 by steel ball 8, and interior collet chuck 29 generates radial contraction and holds extension bar tightly
3, support force is generated by the friction between interior collet chuck and extension bar.
As shown in Figure 3 and Figure 4 is respectively the structural schematic diagram of interior collet chuck and outer collet chuck, as can be seen from the figure two collet chucks
Axial slotted pyramidal structure is all used, so covering in 27 uphill process in upper press ring, two collet chucks can generate diameter
To contraction, to hold extension bar 3 tightly, support force is generated by friction.
The working principle of the invention is broadly divided into three parts, specific as follows:
First part is that oil liquid passes through supporting pad centre bore 104 into lower cylinder seat centre bore 101, pushes piston rod 19 upward
It moves at the interior step of lower cylinder seat and stops, at the same time, nut 31 compresses extension bar spring 32 and extension bar 3 is driven to stretch out, when
First part's extending action terminates when colliding 1 contact workpiece of screw.
Second part is oil liquid by lower cylinder seat threaded hole 102, under the flow adjustment effect of screw 13, into upper press ring
It covers in oil pocket 103, under the action of oil pressure, upper press ring set 27 is moved up, and outer collet chuck 28 is pushed to move up.In outer collet chuck 28
During moving up, since the gap between outer collet chuck 28 and external conical sleeve 30 and interior collet chuck 29 can all reduce, but due to steel
Ball 8 is filled with gap, so interior collet chuck 29 and outer collet chuck 28 can generate contraction simultaneously, so that extension bar 3 is held tightly, in frictional force
Under effect, extension bar 3 will be unable to move, and complete holding movement.
Part III is after oil pressure off-load, outer collet chuck 28 moves down reset under the action of reset spring 5, presses in promotion
Ring set 27 stops after touching the ladder of ladder bushing 26, at the same time, outer collet chuck 28 and interior collet chuck 29 and external conical sleeve 30
Gap increase, interior collet chuck 29 and outer collet chuck 28 radial dilatation under the action of natural resiliency reset, and unclamp extension bar.Piston rod
19 reset downwards under the action of piston rod spring 20, drive extension bar 3 to move down by nut 31, return to initial position,
Part III homing action is completed at this time.
Compared with prior art, the invention has the following advantages that
1. the present invention uses interior collet chuck and outer collet chuck bitubular clamping structure, two tapered gaps are formed with external conical sleeve, in outer cylinder
During the upper pressure of folder, two gaps reduce simultaneously, and under the action of steel ball, since external conical sleeve is fixed, outer collet chuck and interior collet chuck are same
When shrink, so that interior collet chuck is bigger compared to the shrinkage of Normal hydraulic shoring on the market in one timing of outer collet chuck climb,
The moving distance of outer collet chuck is reduced, to reduce machining accuracy, reduces difficulty of processing.
2. the present invention can be while guaranteeing outer collet chuck slippage, the method by reducing angle of taper significantly increases
The support force of hydraulic support cylinder improves the service performance of hydraulic support cylinder.
Finally, it should be noted that above-described embodiments are merely to illustrate the technical scheme, rather than to it
Limitation；Although the present invention is described in detail referring to the foregoing embodiments, those skilled in the art should understand that:
It can still modify to technical solution documented by previous embodiment, or to part of or all technical features into
Row equivalent replacement；And these modifications or substitutions, it does not separate the essence of the corresponding technical solution various embodiments of the present invention technical side
The range of case.
Claims (10)
1. a kind of bitubular clamping structure hydraulic support cylinder, it is characterised in that: it includes cylinder body, cylinder barrel, extension bar, interior collet chuck, outer cylinder
The inside of the cylinder body is arranged in folder and lower cylinder seat, the cylinder barrel, and the extension bar is fixed on the center of the cylinder barrel,
For the interior drum jacket in the lower end outside of extension bar, the outside of the interior collet chuck is arranged the outer collet chuck, the interior collet chuck and
The axial direction of the outer collet chuck, which opens up, to be had the gap, and the inner wall of the outer wall of the interior collet chuck and the outer collet chuck is taper, described
There is parallel conical surface gap between interior collet chuck and outer collet chuck, be provided with external conical sleeve on the outside of the outer collet chuck, the interior collet chuck and
Multiple steel balls are placed in the parallel conical surface gap of the outer collet chuck；The upper end of the multiple steel ball is by interior collet chuck and outer collet chuck
Upper rim carries out axially position, and the lower end of multiple steel balls carries out axially position by means of a upper press ring set.
2. bitubular clamping structure hydraulic support cylinder according to claim 1, it is characterised in that: the upper press ring set and ladder set
Sealing ring is separately installed between cylinder and between external conical sleeve.
3. bitubular clamping structure hydraulic support cylinder according to claim 1, it is characterised in that: pacify the upper surface of the outer collet chuck
Equipped with spring base, spring base and cylinder barrel top are equipped with reset spring, are equipped with sleeve between interior collet chuck and cylinder barrel.
4. bitubular clamping structure hydraulic support cylinder according to claim 3, it is characterised in that: between the extension bar and cylinder barrel
Dustband is installed, the top of the extension bar is equipped with collision screw, installs between the collision screw and the extension bar
There is sealing ring, sealing ring is installed between the lower cylinder seat and ladder bushing.
5. bitubular clamping structure hydraulic support cylinder according to claim 1, it is characterised in that: be provided with below the external conical sleeve
Sealing shroud is separately installed with sealing ring between the sealing shroud and external conical sleeve and between the sealing shroud and the cylinder barrel.
6. bitubular clamping structure hydraulic support cylinder according to claim 1, it is characterised in that: the sealing shroud and lower cylinder seat it
Between corrugated gasket is installed.
7. bitubular clamping structure hydraulic support cylinder according to claim 1, it is characterised in that: spring catch is housed on the cylinder barrel
Circle, the check ring are used to carry out axially position to the lower cylinder seat, are provided with supporting pad below the lower cylinder seat, described
Sealing ring is installed between supporting pad and cylinder barrel, sealing ring is installed below the supporting pad.
8. bitubular clamping structure hydraulic support cylinder according to claim 1, it is characterised in that: in the centre bore of the lower cylinder seat
Piston rod is installed, sealing ring is installed between the piston rod and lower cylinder seat, is pacified between the piston rod and lower cylinder seat top
Equipped with piston rod spring.
9. bitubular clamping structure hydraulic support cylinder according to claim 1, it is characterised in that: installed in the extension bar inner hole
There is nut, extension bar spring is housed between the nut and collision screw.
10. bitubular clamping structure hydraulic support cylinder according to claim 1, it is characterised in that: the lower cylinder seat of the cylinder barrel is inclined
Threaded hole is offered at the heart, screw is installed at the threaded hole, can be adjusted by adjusting position of the screw in threaded hole
By uninterrupted, thus adjust hydraulic cylinder holding time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811468359.6A CN109854564B (en) | 2018-12-03 | 2018-12-03 | Hydraulic support cylinder with double-cylinder clamp structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811468359.6A CN109854564B (en) | 2018-12-03 | 2018-12-03 | Hydraulic support cylinder with double-cylinder clamp structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109854564A true CN109854564A (en) | 2019-06-07 |
| CN109854564B CN109854564B (en) | 2024-01-23 |
Family
ID=66890546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811468359.6A Active CN109854564B (en) | 2018-12-03 | 2018-12-03 | Hydraulic support cylinder with double-cylinder clamp structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109854564B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201953740U (en) * | 2011-01-18 | 2011-08-31 | 邱魏俊恺 | Novel supporting structure |
| CN203081897U (en) * | 2012-12-12 | 2013-07-24 | 邱魏聪哲 | Hydraulic support cylinder body |
| CN103486106A (en) * | 2013-09-18 | 2014-01-01 | 毕晴春 | Floating supporting oil cylinder |
| JP2015223647A (en) * | 2014-05-27 | 2015-12-14 | パスカルエンジニアリング株式会社 | Clamp device |
| CN207879759U (en) * | 2018-02-05 | 2018-09-18 | 浙江轩业电气设备有限公司 | A kind of frock clamp auxiliary hydraulic support cylinder |
| CN209180152U (en) * | 2018-12-03 | 2019-07-30 | 燕山大学 | A kind of bitubular clamping structure hydraulic support cylinder |
-
2018
- 2018-12-03 CN CN201811468359.6A patent/CN109854564B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201953740U (en) * | 2011-01-18 | 2011-08-31 | 邱魏俊恺 | Novel supporting structure |
| CN203081897U (en) * | 2012-12-12 | 2013-07-24 | 邱魏聪哲 | Hydraulic support cylinder body |
| CN103486106A (en) * | 2013-09-18 | 2014-01-01 | 毕晴春 | Floating supporting oil cylinder |
| JP2015223647A (en) * | 2014-05-27 | 2015-12-14 | パスカルエンジニアリング株式会社 | Clamp device |
| CN207879759U (en) * | 2018-02-05 | 2018-09-18 | 浙江轩业电气设备有限公司 | A kind of frock clamp auxiliary hydraulic support cylinder |
| CN209180152U (en) * | 2018-12-03 | 2019-07-30 | 燕山大学 | A kind of bitubular clamping structure hydraulic support cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109854564B (en) | 2024-01-23 |
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