CN207621103U - A kind of buffer-type hydraulic cylinder - Google Patents
A kind of buffer-type hydraulic cylinder Download PDFInfo
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- CN207621103U CN207621103U CN201721110872.9U CN201721110872U CN207621103U CN 207621103 U CN207621103 U CN 207621103U CN 201721110872 U CN201721110872 U CN 201721110872U CN 207621103 U CN207621103 U CN 207621103U
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- buffer
- rear end
- buffer bar
- end cap
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Abstract
The utility model provides a kind of buffer-type hydraulic cylinder comprising：Piston rod, drive end bearing bracket, rear end cap, positioned at hollow cylinder and buffer bar between the two, the cushion chamber that the rear end of piston rod has along the axially extending of piston rod and is aligned with buffer bar, buffer bar has the first section and the second section, first section has the axially extending fluid channel along buffer bar, one end of fluid channel is opened wide towards rodless cavity room section, the other end is in fluid communication with the oil duct in rear end cap, wherein buffer bar is mounted by screwing to the rear end cap, the length of second section is conditioned, and in moving process of the piston rod towards rear end cap, first section enters in cushion chamber so that cushion chamber and rodless cavity room section hydraulic isolation.This buffer-type hydraulic cylinder can stretch out the length of rear end cap by adjusting buffer bar, adapt to operating mode variation, and in the occasion for needing to quantitatively determine backward position, can be realized by the quantitative extension for adjusting buffer bar.
Description
Technical field
The utility model is related to hydraulic cylinder more particularly to a kind of buffer-type hydraulic cylinders.
Background technology
Hydraulic cylinder is applied to the various aspects of engineering field, but the occasion used is different, initial bit of the people to oil cylinder
Set has different requirements with maximum backward position.Hydraulic cylinder under the operating mode of backhaul, have faster opening speed, generate compared with
Big impact, so being designed with buffer unit in cylinder ends.Traditional buffer unit adopts buffer bar and piston rod end
It is threadedly coupled, when reaching backhaul maximum position, buffer bar tail portion enters end cap, piston stop motion.
However, this traditional buffer unit cannot easily adjust hydraulic cylinder backward position.When operating mode changes, hydraulic pressure
The adjustment of the operating position of cylinder usually only two schemes, first, by dismantling hydraulic cylinder, adjustment buffer bar is connect with piston rod
Partial length is adjusted；Second is that changing external oil circuit, tune stream device is increased or decreased.Due to the assembly precision of hydraulic cylinder
Bigger with difficulty, traditional hydraulic cylinder is not suitable for the occasion that operating mode often changes.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, providing a kind of easily can quantitatively be adjusted
Buffer-type hydraulic cylinder.
For this purpose, providing a kind of buffer-type hydraulic cylinder comprising：Piston rod, drive end bearing bracket, rear end cap, buffer bar and it is located at
Hollow cylinder between the drive end bearing bracket and the rear end cap is formed with chamber in the hollow cylinder, and the piston rod, which has, to be extended through
Go out the front end of the drive end bearing bracket and positioned at the indoor rear end equipped with piston of the chamber, which is separated into rod chamber room area by the chamber
The rear end of section and rodless cavity room section, the piston rod has along the axially extending of the piston rod and is aligned with the buffer bar slow
Chamber is rushed, and the buffer bar has the first section extended inward into the rodless cavity room section across the rear end cap and is located at
On the outside of the rear end cap there is externally threaded second section, first section to have the axially extending fluid along the buffer bar logical
The one end in road, the fluid channel is opened wide towards the rodless cavity room section, the other end and the oil duct fluid being arranged in the rear end cap
Connection, wherein the buffer bar is mounted by screwing to the rear end cap so that the length energy of second section of the buffer bar
It is conditioned, and during the piston rod is moved towards the rear end cap, the first section of the buffer bar enters the cushion chamber
In so that the cushion chamber and the rodless cavity room section hydraulic isolation.
The length that buffer bar stretches out rear end cap is adjusted by screwing buffer bar, can adapt to operating mode variation.Also, it is needing
The occasion of backward position is quantitatively determined, can be realized by the quantitative extension for adjusting buffer bar.
A scheme according to the present utility model, buffer-type hydraulic cylinder further include the positioning being fixedly installed on the outside of rear end cap
Set, the outer end of the positioning sleeve, which is equipped with, has female threaded hole, the external screw thread and threaded hole that buffer bar passes through second section
Internal thread be threadedly coupled to the rear end cap.By the way that positioning sleeve is arranged, assembly precision can be better ensured that.Advantageously, it is
The adjusting, the horizontal distance between the outer end face of positioning sleeve and the outer end face of the buffer bar is facilitated to be at least 30mm.
An alternative solution according to the present utility model, the hole that buffer bar in the rear end cap, described passes therethrough
To have female threaded hole, the buffer bar passes through the external screw thread of second section and the internal thread screw thread of the threaded hole
It is connected to the rear end cap.Advantageously, for the convenience of adjusting, between the outer end face of the rear end cap and the outer end face of the buffer bar
Horizontal distance be at least 30mm.
Preferably, it is additionally provided with the buffer substrate tablet around the cushion chamber in the endface of the piston.Herein, buffer substrate tablet
Effect is to coordinate buffer bar use to play to prevent hydraulic oil from entering rodless cavity room section so that the cushion chamber and the rodless cavity room area
Section hydraulic isolation.It is insufficient in piston rod and buffer bar machining accuracy and assembly precision, buffer bar caused by possibility
The hydraulic oil that cannot be isolated after into the buffer chamber in piston rod in the section of rodless cavity room enters cushion chamber, and buffering is caused to be lost
Effect.By providing buffer substrate tablet, such case can be avoided the occurrence of.
In an advantageous scheme, which is additionally provided with the guide sleeve of the neighbouring drive end bearing bracket, for ensureing
State the assembly concentricity of piston rod and the buffer bar.
In a preferred embodiment, in order to more easily quantitatively adjust backward position, set in the second section of the buffer bar
There is length scale label, without measuring, you can quantitative adjusting is carried out to its extension.Advantageously, the buffer bar
It is processed into a taper end of first section.So, it is ensured that the assembly accuracy of buffer bar and cushion chamber.
In the present invention, it is preferable that the other end of the fluid channel is by being arranged being somebody's turn to do in the buffer bar
Radial hole in first section is in fluid communication with the oil duct in the rear end cap.
In a preferred embodiment, it is threaded in or out buffer bar, the outer end structure of the second section of buffer bar for convenience
Square structure is caused, to be matched with common spanner.It is also covered by it is to be understood that outer end is configured to other suitable structures
In the scope of the utility model.
Description of the drawings
The utility model is more fully described below with reference to schematical attached drawing.Attached drawing and corresponding embodiment be only for
The purpose of explanation, rather than limits the present invention.Wherein：
Fig. 1 shows the structural schematic diagram of the buffer-type hydraulic cylinder of one embodiment according to the present utility model；
Fig. 2 shows the structural schematic diagrams of the piston rod with piston of one embodiment according to the present utility model；
Fig. 3 shows the structural schematic diagram of the buffer bar of one embodiment according to the present utility model.
Specific implementation mode
The exemplary embodiment of the utility model is described below in detail.Exemplary implementation shown in described below and attached drawing
Example is intended to introduction the principles of the present invention, enables those skilled in the art in several varying environments and for several differences
Application implementation and use the utility model.Therefore, exemplary embodiment is not intended to and should not be considered as to this practicality
The restricted description of novel protected range.On the contrary, the scope of protection of the utility model is limited to the appended claims.
Fig. 1 shows the buffer-type hydraulic cylinder of one embodiment according to the present utility model comprising drive end bearing bracket 2, rear end
Lid 3 and the hollow cylinder 5 between the drive end bearing bracket 2 and rear end cap 3 are formed with chamber in the hollow cylinder 5.Piston rod 1
Front end extend through drive end bearing bracket 2, the rear end with piston 7 is located in the chamber, and chamber is separated into rod chamber room section by piston 7
6a and rodless cavity room section 6b two parts.It is equipped in the drive end bearing bracket 2 for making rod chamber room section 6a (not show with hydraulic oil container
Go out) be in fluid communication fluid channel 21, the hydraulic oil container be used for store ensure hydraulic work system needed for hydraulic oil.Before this
Guide sleeve 10, the assembly concentricity for ensureing piston rod 1 and buffer bar 4 are equipped at end cap 2.
As shown in Fig. 2, the rear end of piston rod 1 is equipped with along its axially extending cushion chamber 11, it is described in this embodiment slow
It rushes chamber 11 and is configured to the cylindrical unthreaded hole that center axis is overlapped with the central axis of piston rod 1.Herein, piston rod 1 and work
Plug 7 is preferably made into integration.It is equipped with circumferential slot on the peripheral surface of piston 7, O-ring seal is equipped in the circumferential slot.
In this embodiment, buffer-type hydraulic cylinder further includes buffer bar 4, and rear end cap 3 is equipped with and to be passed through for buffer bar 4
Hole 31, the first section 41 of buffer bar 4 extend inwardly through the hole 31 and enter rodless cavity room section 6b, and the second section 42 is buffering
The part for extending outwardly beyond rear end cap 3 of bar 4.When assembling completion, cushion chamber 11 is aligned with the first section 41 of buffer bar,
When hydraulic cylinder is in backhaul working condition, i.e., when piston 7 is moved towards rear end cap, the first section 41 of buffer bar will enter
In cushion chamber 11, and the first section 41 and 11 clearance fit of cushion chamber of the buffer bar.Advantageously, in the face of piston 7
The buffer substrate tablet 9 around cushion chamber 11 is equipped with to rodless cavity room section 6b outer end faces, for hydraulic isolation cushion chamber 11 and without bar
Chamber section 6b.
As shown in figure 3, the first section 41 of buffer bar 4 is hollow, there is the axially extending fluid along the buffer bar
Channel 43, and the distalmost end of the first section 41 of the buffer bar is processed into certain taper, and for example, about 110 ° to about
120°.Specifically, one end of the fluid channel 43 is opened wide towards rodless cavity room section 6b, and the other end is by being arranged hollow
At least one of the wall portion of the first section radial hole 44 be in fluid communication with the oil duct (not shown) in rear end cap 3, the oil duct
It is fluidly connected to hydraulic oil container.Also, the periphery of the second section for extending beyond rear end cap 5 of buffer bar 4 is formed with external screw thread.
In embodiment shown in Fig. 1, in order to ensure assembly precision, buffer bar 4 is installed by being fixedly installed to the positioning sleeve 8 of rear end cap 3
Into buffer-type hydraulic cylinder.One end (alternatively referred to as inner end) of the wherein positioning sleeve 8 is installed to rear end cap, the other end by screw
(alternatively referred to as outer end) is equipped with the hole passed through for buffer bar 4, which is to make female threaded hole 82.
In assembly, the hole 31 in rear end cap is passed through to enter the suitable position in rodless cavity room section 6b buffer bar 4 first
It sets, then positioning sleeve 8 is screwed to the second section of buffer bar, and be fixedly installed on rear end cap 3 by screw.So match
It sets so that according to the specific operating mode of buffer-type hydraulic cylinder, extended to adjust buffer bar 4 by screwing the second section 42 of buffer bar
Enter the length in the section 6b of rodless cavity room.Buffer bar 4 is arranged so that the outer end face of positioning sleeve 8 is slow with this for operating easily,
Horizontal distance between the outer end face of second section 42 of jumper bar 4 is at least 30mm.
Alternatively, in order to simplify structure, in another embodiment of the utility model, positioning can not also be set
Set, and the hole 31 in rear end cap 3 is configured to make female threaded hole, the buffer bar passes through the outer of second section 42
The internal thread of screw thread and the threaded hole is threadedly coupled to the rear end cap 3.According to the specific operating mode of buffer-type hydraulic cylinder, pass through
The second section 42 of buffer bar is screwed to adjust the length that buffer bar 4 extends into the section 6b of rodless cavity room.For operating easily,
Buffer bar 4 is arranged so that the horizontal distance between the outer end face of rear end cap 3 and the outer end face of the buffer bar 4 is at least 30mm.
In a preferred embodiment of the utility model, the second section of the buffer bar 4 is marked equipped with length scale.
In the occasion for needing quantitatively to adjust, buffer bar 4 can be directly screwed into and out determining length scale.It is being not provided with length
In the case of scale mark, since buffer bar 4 is threadedly coupled by external screw thread and rear end cap 3 or positioning sleeve 8, partly
Screwing in or screw out buffer bar 4 can be to measure buffer bar 4 on the basis of the outer end face of the outer end face of rear end cap 3 or positioning sleeve 8
The length for stretching out outer end cap 3 or positioning sleeve 8, calculate the backward position of needs, quantitative adjusting carried out to buffer bar.Although the party
Formula is relative complex relative to the scheme marked equipped with length scale, but is also covered by within the protection scope of the present utility model.
Advantageously, it is threaded in or out buffer bar for convenience, the outer end side of being also configured to of the second section of buffer bar
Shape structure, to be matched with common spanner.
In impulse stroke, the hydraulic oil from hydraulic oil container enters buffer bar through oil duct, the radial hole 44 in rear end cap 3
Fluid channel 43 in 4, however enter in the cushion chamber 11 of piston rod 1, pressure is generated, piston rod 1 is pushed to start to work, until
Piston 7 moves away buffer bar 4, and hydraulic oil enters rodless cavity room section 6b.
In the backhaul stage, the piston rod 1 of buffer-type hydraulic cylinder is moved together with piston 7 towards rear end cap 3, and hydraulic oil passes through slow
Fluid channel 43 and radial hole 44 in first section 41 of jumper bar 4 flow out to the oil duct in rear end cap 3, are subsequently vented to hydraulic pressure
In fuel tank.Piston rod 1 advances to the front end with taper of buffer bar 4, and the cushion chamber of 1 rear end of piston rod is entered by guiding role
In 11, due to the effect of buffer substrate tablet 9 and O-ring seal, piston rod 1 runs slowly, until by most of liquid in cushion chamber 11
Pressure oil is discharged, and piston rod 1 is stopped, and reaches backward position.
Above-mentioned buffer-type hydraulic cylinder according to the present utility model, the extending type that extension is adjusted by offer buffer
Bar, can in complex working condition, in the state of often switching backward position, easily and can quantitatively adjust buffer bar in nothing
Length in the section of rod cavity room, to obtain suitable backward position.
It should be pointed out that explanation above is merely exemplary, those skilled in the art can be according to the above description to this reality
Various modifications and variations are made with new embodiment, these modifications and variations both are within the protection scope of the present invention.
Claims (9)
1. a kind of buffer-type hydraulic cylinder comprising：Piston rod (1), drive end bearing bracket (2), rear end cap (3), buffer bar (4) and it is located at
Hollow cylinder (5) between the drive end bearing bracket and the rear end cap is formed with chamber in the hollow cylinder, and the piston rod (1) has
Extend the front end for being pierced by the drive end bearing bracket (2) and be located at the indoor rear end equipped with piston (7) of the chamber, the piston (7) is by the chamber
(6) rod chamber room section (6a) and rodless cavity room section (6b) are separated into, which is characterized in that the rear end of the piston rod (1) has
The cushion chamber (11) being aligned along the axially extending of the piston rod and with the buffer bar (4), and the buffer bar (4) have across
The first section (41) and be located at the rear end cap (3) outside that the rear end cap (3) extends inward into the rodless cavity room section (6b)
There is externally threaded second section (42), first section to have the axially extending fluid channel along the buffer bar for side
(43), one end of the fluid channel is opened wide towards the rodless cavity room section (6b), and the other end is with setting in the rear end cap (3)
Oil duct is in fluid communication, and wherein the buffer bar (4) is mounted by screwing to the rear end cap so that this second of the buffer bar
The length of section (42) can be conditioned, and during the piston rod (1) is mobile towards the rear end cap (3), the buffer bar
First section enters in the cushion chamber (11) so that the cushion chamber (11) and rodless cavity room section (6b) hydraulic isolation.
2. buffer-type hydraulic cylinder according to claim 1, which is characterized in that further include being fixedly installed to the rear end cap
(3) positioning sleeve (8) on the outside of, the outer end (81) of the positioning sleeve, which is equipped with, has female threaded hole (82), and the buffer bar is logical
The internal thread of the external screw thread and the threaded hole (82) of crossing second section (42) is threadedly coupled to the rear end cap (3).
3. buffer-type hydraulic cylinder according to claim 1, which is characterized in that the rear end cap (3) includes having interior spiral shell
The threaded hole of line, the buffer bar are passed through from the threaded hole, the buffer bar by the external screw thread of second section (42) and
The internal thread of the threaded hole is threadedly coupled to the rear end cap (3).
4. buffer-type hydraulic cylinder according to claim 2, which is characterized in that the outer end face of the positioning sleeve (8) is slow with this
Horizontal distance between the outer end face of the second section (42) of jumper bar (4) is at least 30mm.
5. buffer-type hydraulic cylinder according to claim 3, which is characterized in that the outer end face of the rear end cap (3) is slow with this
Horizontal distance between the outer end face of the second section (42) of jumper bar (4) is at least 30mm.
6. buffer-type hydraulic cylinder according to claim 1, which is characterized in that be additionally provided in the endface of the piston (7)
Around the buffer substrate tablet (9) of the cushion chamber (11).
7. buffer-type hydraulic cylinder according to any one of claim 1 to 6, which is characterized in that the second of the buffer bar (4)
Section is marked equipped with length scale.
8. buffer-type hydraulic cylinder according to any one of claim 1 to 6, which is characterized in that the fluid channel (43)
The other end by the way that radial hole (44) in first section (41) of the buffer bar (4) and the rear end cap (3) is arranged
In oil duct be in fluid communication.
9. buffer-type hydraulic cylinder according to any one of claim 1 to 6, which is characterized in that the buffer bar (4) is somebody's turn to do
The outer end of second section (42) is configured to square structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721110872.9U CN207621103U (en) | 2017-08-31 | 2017-08-31 | A kind of buffer-type hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721110872.9U CN207621103U (en) | 2017-08-31 | 2017-08-31 | A kind of buffer-type hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207621103U true CN207621103U (en) | 2018-07-17 |
Family
ID=62819023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721110872.9U Active CN207621103U (en) | 2017-08-31 | 2017-08-31 | A kind of buffer-type hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207621103U (en) |
-
2017
- 2017-08-31 CN CN201721110872.9U patent/CN207621103U/en active Active
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