CN206555204U - The attachment structure and hydraulic cylinder of piston and piston rod - Google Patents
The attachment structure and hydraulic cylinder of piston and piston rod Download PDFInfo
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- CN206555204U CN206555204U CN201720217279.8U CN201720217279U CN206555204U CN 206555204 U CN206555204 U CN 206555204U CN 201720217279 U CN201720217279 U CN 201720217279U CN 206555204 U CN206555204 U CN 206555204U
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- piston
- piston rod
- arc adjustment
- adjustment block
- attachment structure
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Abstract
The utility model provides the attachment structure and hydraulic cylinder of a kind of piston and piston rod.Piston and the attachment structure of piston rod that the utility model is provided, including：Piston rod, the first end of piston rod is disposed with threaded connection section, annular groove and the spacing shaft shoulder toward the direction at the second end；At least two arc adjustment blocks, in annular groove；Piston, is arranged on the piston rod；The axial location of piston is limited by least two arc adjustment blocks and the spacing shaft shoulder；The outer peripheral face of each arc adjustment block has taper and is provided with outer cone thread section；Cooperation is engaged with the outer cone thread section of each arc adjustment block in adjusting nut with inside tapered thread hole, the inside tapered thread hole of adjusting nut；Fixing nut, is screwed onto in threaded connection section and compresses and contact with each arc adjustment block.Using the technical solution of the utility model, fixing nut and the extrusion deformation degree of screw thread on piston rod can be reduced, it is ensured that the connection of piston and piston rod is reliable, also cause hydraulic cylinder takes maintenance easily operation apart.
Description
Technical field
The utility model is related to technical field of hydraulic pressure, a kind of attachment structure more particularly, to piston and piston rod and
Hydraulic cylinder.
Background technology
Hydraulic system is such as track-type work machine, the important component of wheel-type working machine tool, its using fluid as
Working media, using fluid pressure energy and manipulate by annexes such as control valves the flexible of hydraulic cylinder, realize Work machine
The action such as steering, lifting, propulsion, meet work requirements.
The agent structure of hydraulic cylinder includes cylinder barrel, and the piston being slidably matched with inner wall of cylinder, and one end are stretched into cylinder barrel
And be connected with piston, the other end stretch out cylinder barrel outside piston rod, cylinder barrel is divided into rod chamber and rodless cavity by piston rod and piston.It is logical
Cross the oil inlet and oil return state of control rod chamber and rodless cavity, it is possible to achieve hydraulic cylinder it is flexible.
Piston and piston rod are typically directly used and are threaded togather in the prior art, or will be living using fixing nut
Plug is pressed on one end of piston rod.Hydraulic cylinder in the operating condition, because the power that hydraulic oil is applied to the piston left and right sides is different
And making piston by alternate load, the screw thread for being easily caused the threaded connection place that piston and piston rod are fixed together is squeezed
Deformation or even damage, the maintenance of taking apart to hydraulic cylinder cause difficulty.
Utility model content
The utility model aims to provide the attachment structure of a kind of piston and piston rod, to solve on present in prior art
State at least one in problem.The utility model additionally provides a kind of hydraulic cylinder.
One side of the present utility model there is provided the attachment structure of a kind of piston and piston rod, including：Piston rod, it is living
The first end of stopper rod is disposed with threaded connection section, annular groove and the spacing shaft shoulder toward the direction at the second end；At least two arcs
Adjustment block, in annular groove；Piston, is arranged on the piston rod；The axial location of piston is by least two arc adjustment blocks
Limited with the spacing shaft shoulder；The first end face of each arc adjustment block contacts with the side wall of annular groove and forms the first contact surface, each arc
The second end face of shape adjustment block and the end contact of piston simultaneously form the second contact surface；Both first contact surface and the second contact surface
At least one of have taper；The outer peripheral face of each arc adjustment block has taper and is provided with outer cone thread section；With inner cone
Cooperation is engaged with the outer cone thread section of each arc adjustment block in the adjusting nut of screwed hole, the inside tapered thread hole of adjusting nut；It is fixed
Nut, is screwed onto in threaded connection section and compresses and contact with each arc adjustment block.
Further, the first contact surface has taper, and the second contact surface is the plane with the axis perpendicular of piston rod.
Further, arc adjustment block has two, respectively the first arc adjustment block and the second arc adjustment block；First
Adjustment gap is formed between the relative end of arc adjustment block and the second arc adjustment block.
Further, arc adjustment block has three.
Further, be provided with the centre bore of piston with the spacing shaft shoulder against stage portion.
Further, the attachment structure also includes the locking for being used to prevent that fixing nut from loosening and/or adjusting nut loosens
Piece, stay is bolted on the first end of piston rod；Bolt deviates the centrally disposed of piston rod.
Further, first seal is provided between piston and piston rod.
Further, the groove for installing second seal is provided with the periphery of piston.
Further, adjusting nut and fixing nut are hex nut.
Other side of the present utility model, additionally provides a kind of hydraulic cylinder, is configured with above-mentioned piston and piston rod
Attachment structure.
The attachment structure of piston and piston rod of the present utility model, by tightening adjusting nut so that adjusting nut is along axle
To movement, each arc adjustment block can be promoted to be contacted along with the first tapered contact surface and/or second towards piston rod
Center position is fed, and tighten fixing nut make fixing nut and each arc adjustment block against.So, work can on the one hand be eliminated
Gap between stopper rod and piston, on the other hand can be such that each arc adjustment block is fastened in annular groove, so that most hand over
Varying load and hydraulic shock are undertaken by each arc adjustment block, so as to reduce fixing nut and the extruding of screw thread on piston rod
Deflection, not only ensure that the connection of piston and piston rod is reliable, and also cause hydraulic cylinder takes maintenance easily operation apart, effectively
The service life of hydraulic cylinder is extended, the use cost of hydraulic cylinder is reduced.
Brief description of the drawings
Embodiment of the present utility model is further described hereinafter with reference to accompanying drawing, in the accompanying drawings：
Fig. 1 diagrammatically illustrates the sectional view of the piston of the utility model embodiment offer and the attachment structure of piston rod；
Fig. 2 diagrammatically illustrates the front view of the arc adjustment block in the utility model embodiment.
Embodiment
Referring to Fig. 1, the structure of the piston of the utility model embodiment offer and the attachment structure of piston rod is shown.As schemed
Shown, the attachment structure of the piston and piston rod at least includes：Piston rod 1, at least two arc adjustment blocks, adjusting nut 3 is living
Plug 4 and fixing nut 5.
The first end of piston rod 1 is extend into cylinder barrel 9 to be connected with piston 4, and the second end of piston rod 1 reaches cylinder barrel 9
Outside.In the first end of piston rod 1, from the first end of piston rod 1 toward the direction at the second end, threaded connection section is disposed with
11st, annular groove 12 and the spacing shaft shoulder 13.
Arc adjustment block is arranged in annular groove 12.It is two with reference to arc adjustment block in Fig. 2, the present embodiment is referred to, point
Not Wei the first arc adjustment block 21 and the second arc adjustment block 22, each arc adjustment block is substantially into C fonts.Certainly, in other realities
Apply in example, the number of arc adjustment block can also be three or more.The outer peripheral face of arc adjustment block has taper and set
It is equipped with outer cone thread section.
Piston 4 is set on piston rod 1, and the axial location of piston 4 is limited by each arc adjustment block and the spacing shaft shoulder 13.
As can be seen from Figure, the first end face of the remote piston 4 of each arc adjustment block and (side wall 121 of side wall 121 of annular groove 12
For the side wall of the remote piston 4 of annular groove 12) contact and form the first contact surface, the of the close piston 4 of each arc adjustment block
The end contact and the second contact surface of formation of biend and piston 4.Wherein, both the first contact surface and the second contact surface in extremely
Few one has taper.
Adjusting nut 3 is set on the outer peripheral face of each arc adjustment block, and with inside tapered thread hole.Adjusting nut 3 it is interior
Cooperation is engaged with the outer cone thread section of each arc adjustment block in taper thread hole.Fixing nut 5 be screwed onto threaded connection section 11 on and with
The first end face of each arc adjustment block compresses contact, so that each arc adjustment block is clamped between fixing nut 5 and piston 4,
Ensure the stabilization of each arc adjustment block axial location.
Piston and the attachment structure of piston rod that the present embodiment is provided, by tightening adjusting nut 3, make the edge of adjusting nut 3
Axial movement, can promote each arc adjustment block to be contacted along the first contact surface with taper and/or second towards piston rod 1
Center position feeding, then tighten fixing nut 5 make fixing nut 5 and each arc adjustment block against.So, on the one hand can be with
The axial gap between piston rod 1 and piston 4 is eliminated, each arc adjustment block can on the other hand be fastened in annular groove 12,
So that most alternate load and hydraulic shock are undertaken by each arc adjustment block, so as to reduce fixing nut 5 with living
The extrusion deformation degree of screw thread on stopper rod 1, not only ensure that the connection of piston 4 and piston rod 1 is reliable, also causes taking apart for hydraulic cylinder
Easily operation is safeguarded, the service life of hydraulic cylinder is effectively extended, reduces the use cost of hydraulic cylinder.If moreover, arc
Shape adjustment block is damaged, also readily replaceable to safeguard.
Preferably, in Fig. 1 it can be seen from the present embodiment the first contact surface there is taper, the second contact surface is and work
The plane of the axis perpendicular of stopper rod 1.For ease of manufacturing and installing, the side wall 121 of annular groove 12 can be made to be configured to truncated cone shape,
Make each arc adjustment block first end face be configured to be used for and fixing nut 5 against (the planar section of planar section 202
With the axis perpendicular of piston rod 1) and for the tapered portion 201 with the abutting contact of side wall 121, it will be understood that taper portion
201 are divided to be engaged with the taper of side wall 121.Certainly, in a unshowned embodiment, can also make the first contact surface be and work
The plane of the axis perpendicular of stopper rod 1, makes the second contact surface have taper.Or, in another unshowned embodiment, may be used also
So that the first contact surface and the second contact surface are respectively provided with taper.
In addition, preferably may be used with reference to the first arc adjustment block 21 and the second arc adjustment block 22 in Fig. 2, the present embodiment is referred to
To be made in the following way：An annulus 2 is produced first so that the internal diameter D of annulus 2 is more than the groover rot diameter of annular groove 12.
Then taper and outer cone thread 203 are processed on the outer surface of annulus 2, the outer cone thread 203 is used to form outer cone spiral shell
Line section, is coordinated with being engaged with the inside tapered thread hole of adjusting nut 3.Afterwards, cone is gone out in the part-toroidal region processing of the end face of annulus 2
Degree, to form the tapered portion 201 for being used for coordinating with the side wall 121 of annular groove 12.Finally, relative to a center line of annulus 2
M-M toward each translation distance A in center line both sides width cut annulus, the cut direction of annulus and center line M-M bearing of trend
It is parallel, so as to form the first arc adjustment block 21 and the second arc adjustment block 22.Because the internal diameter D of annulus is more than annular groove 12
Groover rot diameter, namely the first arc adjustment block 21 and the second arc adjustment block 22 are when being attached to annular groove 12, in not squeezed state
Under, it is separated by predetermined distance between the internal perisporium of each arc adjustment block and the bottom wall of annular groove 12, the predetermined distance formation is adjusted
Whole surplus；Further through cutting annulus 2, make shape between the relative end of the first arc adjustment block 21 and the second arc adjustment block 22
Into adjustment gap, so as to so that each arc adjustment block is in the presence of adjusting nut 3, along side wall 121 into piston rod 1
The heart is moved, and to eliminate the axial gap between piston rod 1 and piston 4, and undertakes most alternate load and hydraulic shock.
Preferably, be provided with the centre bore of piston 4 with the spacing shaft shoulder 13 against stage portion 41, make the spacing shaft shoulder 13
In the inside of piston 4, it can so increase the contact surface of piston 4 and piston rod 1 on the basis of the diameter of piston rod 1 is not increased
Product, and then increase the bonding strength of piston 4 and piston rod 1.Preferably, can also be provided between piston 4 and piston rod 1
One seal 8, for avoiding the fluid of rod chamber or rodless cavity by the slot leakage between piston 4 and piston rod 1 to without bar
Chamber or rod chamber.In addition, being provided with the groove 14 for installing second seal on the periphery of piston 4, groove 14 is used to install
Seal, to avoid the fluid of rod chamber or rodless cavity by the slot leakage between piston 4 and cylinder barrel 9 to rodless cavity or have bar
Chamber.
Preferably, adjusting nut 3 and fixing nut 5 are hex nut, are so easy to adjusting nut 3 and fixing nut
5 are tightened or unscrew operation.In addition, the loosening to prevent fixing nut 5 and/or adjusting nut 3, can also be in piston rod 1
First end pass through bolt 7 be fixedly mounted stay 6.Stay 6 can be bent to form by flat stay, have stay 6
The part fitted with any side of hex nut.Bolt 7 is attached to the position for deviateing the center of piston rod 1, makes the rotation of stay 6
Turn center (center of bolt 7) and the pivot (center of piston rod 1) of adjusting nut 3, fixing nut 5 is inconsistent, can be with
Effectively prevent fixing nut 5, the loosening of adjusting nut 3.
Industrial applicibility
Piston and the attachment structure of piston rod that the present embodiment is provided, during assembling, first can install first seal 8
Into piston 4, the first end of piston rod 1 is passed through from the centre bore of piston 4, make the step of the spacing shaft shoulder 13 and piston 4
Portion 41 leans.Each arc adjustment block is attached in annular groove 12 afterwards, then adjusting nut 3 is screwed to each arc adjustment block
On.Then fixing nut 5 is installed in threaded connection section 11.Afterwards, the position of adjusting nut 3 and fixing nut 5 is carried out
Fine setting, to eliminate the axial gap between fixing nut 5, arc adjustment block, piston 4 and piston rod 1.Then stay 6 is led to
Bolt 7 is crossed to be fixed in the first end of piston rod 1.
Piston and the attachment structure of piston rod that the present embodiment is provided, by making most alternate load and hydraulic punch
Hit and undertaken by each arc adjustment block, so as to reduce fixing nut 5 and the extrusion deformation degree of screw thread on piston rod 1, not only protected
The connection for having demonstrate,proved piston 4 and piston rod 1 is reliable, and also cause hydraulic cylinder takes maintenance easily operation apart, effectively extends hydraulic pressure
The service life of cylinder, reduces the use cost of hydraulic cylinder.Moreover, if arc adjustment block were damaged, also readily replaceable dimension
Shield.
The utility model embodiment additionally provides a kind of hydraulic cylinder, and the hydraulic cylinder is configured with above-mentioned piston and piston rod
Attachment structure.The piston and the attachment structure of piston rod provided by the utility model embodiment can reach above-mentioned technique effect,
Therefore the hydraulic cylinder should also possess corresponding technique effect, will not be repeated here.
It is understood that various embodiments above of the present utility model be merely to illustrate that principle of the present utility model and
The exemplary embodiment of use, the utility model is not limited thereto.For those skilled in the art, not
In the case of departing from spirit of the present utility model and essence, various changes and modifications can be made therein, and these variations and modifications are also regarded
For within protection domain of the present utility model.Protection domain of the present utility model is only by the language table of appended claims
The implication and its equivalents stated are limited.
Claims (10)
1. the attachment structure of a kind of piston and piston rod, it is characterised in that including：
Piston rod (1), the first end of the piston rod is disposed with threaded connection section (11), annular groove toward the direction at the second end
And the spacing shaft shoulder (13) (12)；
At least two arc adjustment blocks, in the annular groove (12)；
Piston (4), is set on the piston rod (1)；The axial location of the piston (4) is adjusted by least two arc
Block and the spacing shaft shoulder (13) are limited；
The first end face of each arc adjustment block contacts with the side wall (121) of the annular groove (12) and forms the first contact
Face, the second end face of each arc adjustment block and the end contact of the piston (4) and the second contact surface of formation；Described first
At least one of both contact surface and second contact surface have taper；The outer peripheral face of each arc adjustment block has cone
Spend and be provided with outer cone thread section；
Adjusting nut (3) with inside tapered thread hole, the inside tapered thread hole of the adjusting nut (3) and each arc adjustment block
Outer cone thread section engagement coordinate；
Fixing nut (5), is screwed onto on threaded connection section (11) and is compressed with each arc adjustment block and contact.
2. attachment structure according to claim 1, it is characterised in that first contact surface has taper, described second
Contact surface is the plane with the axis perpendicular of the piston rod (1).
3. attachment structure according to claim 1, it is characterised in that the arc adjustment block has two, respectively the
One arc adjustment block and the second arc adjustment block；The relative end of the first arc adjustment block and the second arc adjustment block
Adjustment gap is formed between portion.
4. attachment structure according to claim 1, it is characterised in that the arc adjustment block has three.
5. attachment structure according to claim 1, it is characterised in that be provided with and institute in the centre bore of the piston (4)
State the spacing shaft shoulder (13) against stage portion (41).
6. attachment structure according to any one of claim 1 to 5, it is characterised in that also including described solid for preventing
Determine the stay (6) that nut (5) loosens and/or the adjusting nut (3) loosens, the stay (6) is fixed by bolt (7)
First end in the piston rod (1)；The bolt (7) deviates the centrally disposed of the piston rod (1).
7. attachment structure according to claim 6, it is characterised in that set between the piston (4) and the piston rod (1)
It is equipped with first seal (8).
8. attachment structure according to claim 6, it is characterised in that be provided with the periphery of the piston for installing the
The groove (14) of two seals.
9. attachment structure according to claim 6, it is characterised in that the adjusting nut (3) and the fixing nut (5)
It is hex nut.
10. a kind of hydraulic cylinder, it is characterised in that the piston being configured with any one of claim 1 to 9 and the company of piston rod
Binding structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720217279.8U CN206555204U (en) | 2017-03-07 | 2017-03-07 | The attachment structure and hydraulic cylinder of piston and piston rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720217279.8U CN206555204U (en) | 2017-03-07 | 2017-03-07 | The attachment structure and hydraulic cylinder of piston and piston rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206555204U true CN206555204U (en) | 2017-10-13 |
Family
ID=60363360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720217279.8U Active CN206555204U (en) | 2017-03-07 | 2017-03-07 | The attachment structure and hydraulic cylinder of piston and piston rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206555204U (en) |
-
2017
- 2017-03-07 CN CN201720217279.8U patent/CN206555204U/en active Active
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| GR01 | Patent grant |