CN209621755U - Buffering hydraulic oil cylinder - Google Patents
Buffering hydraulic oil cylinder Download PDFInfo
- Publication number
- CN209621755U CN209621755U CN201821996340.4U CN201821996340U CN209621755U CN 209621755 U CN209621755 U CN 209621755U CN 201821996340 U CN201821996340 U CN 201821996340U CN 209621755 U CN209621755 U CN 209621755U
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- hole
- oil
- piston
- cylinder
- check valve
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- Fluid-Damping Devices (AREA)
Abstract
The utility model relates to hydraulic cylinders, to solve the problems, such as oil cylinder buffering and quick start up and down.Buffering hydraulic oil cylinder includes housing assembly and piston rod assembly, and housing assembly is made of cylinder cap, cylinder and cylinder head, and piston rod assembly is made of piston and piston rod.One end of piston rod is connect with piston, other end is stretched out outside oil cylinder from cylinder cap, oil cylinder inner space is separated into rod chamber and rodless cavity by piston, and the hydraulic fluid port communicated with rodless cavity, rod chamber is arranged on cylinder, setting throttling passage, oil-through-hole, installation check valve in piston.Piston rod assembly moves near cylinder cap or cylinder head, and piston closes hydraulic fluid port, and rod chamber or rodless cavity are communicated by throttling passage with hydraulic fluid port, because of the damping action of throttling passage, to realize the buffering up and down of oil cylinder.When oil cylinder stretches out or retracts starting, hydraulic oil flows into buffering oil circuit from hydraulic fluid port, opens check valve, flows out to rodless cavity or rod chamber from check valve, quickly stretches out or retract starting to realize.
Description
Technical field
It is specifically a kind of with the hydraulic cylinder buffered up and down the present invention relates to a kind of hydraulic cylinder.
Background technique
Hydraulic cylinder can generate strong impact, noise even machinery in stroke terminal and touch in quick motion process
It hits, especially in case of high pressures, more obvious, the serious service life for affecting oil cylinder of this influence, thus it is necessary
Buffering appropriate and braking are carried out before terminating to move, to guarantee the service life of hydraulic system and oil cylinder, general common buffering has
It is buffered outside buffering and cylinder in cylinder, however, buffering the complexity that will increase entire hydraulic system outside cylinder, increases entire hydraulic system
Cost, and buffer structure is simple in cylinder, it is small in size, it does not need additionally to increase the Hydraulic Elements such as any flow control valve, is a kind of
More satisfactory buffering method.
Oil cylinder used at present with buffer structure also generally existing following two problem: 1) only have oil cylinder rodless cavity side or
There is buffer structure in rod chamber side, i.e. oil cylinder only has upper buffering or lower buffering, has the oil cylinder buffered up and down less；2) band
The oil cylinder starting speed of buffer structure is slow.
Summary of the invention
The object of the present invention is to provide having the hydraulic cylinder buffered up and down, this cushion cylinder is not only realized slow up and down
Punching, and can solve the problems such as current hydraulic cylinder starting speed is slow.
To solve the above-mentioned problems, the technical solution adopted by the present invention is that: the buffering hydraulic oil cylinder includes cylinder body group
Part and piston rod assembly, the housing assembly are made of cylinder cap, cylinder and cylinder head, and the piston rod assembly is by piston and piston rod group
At.One end of piston rod is connect with piston, and other end is stretched out outside oil cylinder from cylinder cap, and the piston is by the housing assembly
Inner space is separated into rod chamber and rodless cavity, and the hydraulic fluid port communicated with rodless cavity, rod chamber is provided on cylinder, is provided on piston
Throttling passage, oil-through-hole, check valve install stepped hole, and the piston rod assembly moves near cylinder cap or cylinder head, piston envelope
It closes hydraulic fluid port, rod chamber or rodless cavity and is communicated by throttling passage with hydraulic fluid port, because of the damping action of throttling passage, to realize oil
The buffering of cylinder.
Above-mentioned cushion cylinder, the piston are multi-diameter shaft, and the first ladder shaft diameter is big, matches with cylinder, the second ladder
Shaft diameter is small, socket-connects with the cavity in piston rod；Piston the first multi-diameter shaft rodless cavity side end face center opens up the first oil-through-hole,
And N number of check valve installation stepped hole one is opened up on the same circumference of this end face, piston the second ladder axial end center opens up the
Two oil-through-holes, the first oil-through-hole are not communicated with the second oil-through-hole.M are opened up in the first same circumferential end surfaces in multi-diameter shaft rod chamber side
Check valve installs stepped hole two, opens up connection check valve installation stepped hole two close to rod chamber side outer round surface in the first multi-diameter shaft
Second throttling passage of bottom and the second oil-through-hole bottom, the second throttling passage item number are M item, are installed with the check valve of institute connection
Stepped hole two is corresponding, opens up perforation check valve installation one bottom of stepped hole and the close to rodless cavity outer round surface in the first multi-diameter shaft
The first throttle channel of one oil-through-hole bottom, first throttle channel strips number are N item, install stepped hole one with the check valve of institute connection
It is corresponding.The throttling passage is not connected.
Above-mentioned cushion cylinder, the first throttle channel are made of first segment chute, first segment discharge orifice, the first through hole,
Second throttling passage is by the second throttling channel, the second throttle orifice, the second through hole composition, the first segment chute, the second throttling
Slot is the annular groove on the first multi-diameter shaft of piston, and the first segment discharge orifice connection first segment chute and check valve install stepped hole
One bottom, the second throttling channel of the second throttle orifice connection and check valve install two bottom of stepped hole, first through hole
Connection first segment discharge orifice and the first oil-through-hole bottom, the second throttle orifice of the second through hole connection and the second oil-through-hole bottom.
The first segment discharge orifice, the second orifice diameter is less than the first through hole, the second through hole.
Above-mentioned cushion cylinder, the check valve are mounted in check valve installation stepped hole, and check valve controls hydraulic oil from section
Circulation road flows to rod chamber or rodless cavity, and reversed oil circuit is obstructed.
Above-mentioned cushion cylinder, the end that the piston rod is connect with piston have opened up cavity, second multi-diameter shaft of piston
It is socketed in piston rod cavity, cavity bottom offers big radial hole P to be connected with rod chamber, and connection oil circuit is by big radial
Hole, piston rod bottom pocket gap, the second oil-through-hole are constituted.
Above-mentioned cushion cylinder, cylinder cap rod chamber side end face open up cushion chamber, and cushion chamber and piston rod have gap.
Above-mentioned cushion cylinder, the lower buffering oil circuit is by first throttle channel, the first oil-through-hole composition, the upper buffering
Oil circuit is by the second throttling passage, connection oil circuit composition.
The working principle of above-mentioned cushion cylinder, the cushion cylinder buffered up and down is: it is attached that piston rod assembly moves to cylinder head
When close, the piston closes lower hydraulic fluid port, and rodless cavity relative closure, hydraulic oil flows to lower hydraulic fluid port from lower buffering oil circuit, because slow
The throttle effect for rushing first segment discharge orifice in oil circuit, reduces the speed of rodless cavity hydraulic oil outflow, improves rodless cavity liquid
The pressure of pressure oil realizes lower buffering to reduce the movement velocity of piston rod assembly；Piston rod assembly moves near cylinder cap
When, the piston closes upper hydraulic fluid port, and rod chamber relative closure, hydraulic oil buffers oil circuit from cushion chamber flow direction, from upper hydraulic fluid port stream
Out, because in gap between cushion chamber and piston rod and upper buffering oil circuit the second throttle orifice damping action, reduced
The speed of rod cavity hydraulic oil outflow, improves the pressure of rod chamber hydraulic oil, so that the movement velocity of piston rod assembly is reduced, it is real
Now upper buffering.
The working principle of above-mentioned cushion cylinder, the quick start of the cushion cylinder is: 1) stretch out starting: hydraulic oil is under
Hydraulic fluid port flows into buffering oil circuit, opens check valve one, flows out to rodless cavity from check valve one, quickly stretches out starting to realize；2)
Starting is retracted, hydraulic oil flows into buffering oil circuit from upper hydraulic fluid port, opens check valve two, flow out to rod chamber from check valve two, realizes
Fast retractile starting.
Detailed description of the invention
The main view of Fig. 1 hydraulic cushion oil cylinder
Buffering hydraulic oil flow schematic diagram under Fig. 2 hydraulic cushion oil cylinder
Buffering hydraulic oil flow schematic diagram on Fig. 3 hydraulic cushion oil cylinder
Fig. 4 hydraulic cushion oil cylinder stretches out quick start running of hydraulic power oil schematic diagram
Fig. 5 hydraulic cushion oil cylinder retracts quick start running of hydraulic power oil schematic diagram
Parts title and serial number in figure: piston rod 1, cylinder cap 2, cylinder 3, cushion chamber 4, rod chamber 5, cavity bottom gap 6,
Big radial hole 7, the second oil-through-hole 8, check valve mounting hole 29, check valve 2 10, piston 11, the first through hole 12, first throttle
Slot 13, first segment discharge orifice 14, check valve mounting hole 1, check valve 1, rodless cavity 17, cylinder head 18, the first oil-through-hole 19, under
Hydraulic fluid port 20, the second through hole 21, the second throttle orifice 22, the second throttling channel 23, upper hydraulic fluid port 24.
Specific embodiment
Illustrate specific embodiment with reference to the accompanying drawing.
As shown in Figure 1, the hydraulic cushion oil cylinder in the present embodiment, including housing assembly and piston rod assembly, the cylinder
Body component is made of cylinder cap 2, cylinder 3 and cylinder head 18, and the piston rod assembly is made of piston 11 and piston rod 1.The one of piston rod 1
End is connect with piston 11, and other end is stretched out outside oil cylinder from cylinder cap 2, and the piston 11 is by the housing assembly inner space
It is separated into rod chamber 5 and rodless cavity 17, the hydraulic fluid port communicated with rodless cavity 17, rod chamber 5 is provided on cylinder 3, is arranged on piston 11
Throttling passage, oil-through-hole, check valve install stepped hole, and the piston rod assembly moves near cylinder cap 2 or cylinder head 18, living
11 closing hydraulic fluid port of plug, rod chamber 5 or rodless cavity 17 are communicated by throttling passage with hydraulic fluid port.
As shown in Figure 1, piston 11 is multi-diameter shaft, the first ladder shaft diameter is big, matches with cylinder 3, the second ladder shaft diameter
It is small, it is socketed in the cavity of piston rod 1；11 first multi-diameter shaft rodless cavity side end face center of piston opens up the first oil-through-hole 19, and
4 check valve installation stepped holes 1 are opened up on the same circumference of this end face, 11 second ladder axial end center of piston opens up
Second oil-through-hole 8, the first oil-through-hole 19 are not communicated with the second oil-through-hole 8.Same circumferential end is opened in the first multi-diameter shaft rod chamber side
3 check valve installation stepped holes 29 are set on face, open up connection check valve peace close to rod chamber side outer round surface in the first multi-diameter shaft
The second throttling passage of 29 bottom of stepped hole and 8 bottom of the second oil-through-hole is filled, the second throttling passage item number is 3, with institute's connection
Check valve installation stepped hole 29 it is corresponding, open up perforation check valve installation rank close to rodless cavity outer round surface in the first multi-diameter shaft
The first throttle channel of terraced one 15 bottom of hole and 19 bottom of the first oil-through-hole, first throttle channel strips number are 4, with institute connection
Check valve is installed stepped hole 1 and is corresponded to, and check valve installs stepped hole 1 as check valve installation 29 specification of stepped hole, single
It is same specification to valve 1 and check valve 2 10.
As shown in Figure 1, first throttle channel is by first segment chute 13, and first segment discharge orifice 14, the first through hole 12 composition, the
Two throttling passages are by the second throttling channel 23, the second throttle orifice 22, the second through hole 21 composition, the first segment chute 13, the
Two throttling channels 23 are the annular groove on 11 first multi-diameter shaft of piston, the 14 connection first segment chute 13 of first segment discharge orifice and list
One 15 bottom of stepped hole is installed to valve, 22 second throttling channel of connection 23 of the second throttle orifice installs stepped hole 29 with check valve
Bottom, the 12 connection first segment discharge orifice 14 of the first through hole and 19 bottom of the first oil-through-hole, second through hole 21
Logical 8 bottom of second throttle orifice 22 and the second oil-through-hole.The first segment discharge orifice 14,22 diameter of the second throttle orifice are passed through less than first
Through-hole 12, the second through hole 21.
As shown in Figure 1, check valve (10,16) is mounted in check valve installation stepped hole (9,15), check valve (10,16) control
Hydraulic oil processed flows to rod chamber 5 or rodless cavity 17 from throttling passage, and reversed oil circuit is obstructed.
As shown in Figure 1, the end that piston rod 1 is connect with piston 11 has opened up cavity, the 11 second ladder axle sleeve of piston
It connects in 1 cavity of piston rod, cavity bottom offers big radial hole (7) 3 to be connected with rod chamber 5, and connection oil circuit is by big
Radial hole 7, piston rod bottom pocket gap 6, the second oil-through-hole 8 are constituted.
As shown in Figure 1,2 rod chamber side end face of cylinder cap opens up cushion chamber 4, cushion chamber 4 and piston rod 1 have gap.
When piston rod assembly is moved near cylinder head 18, hydraulic fluid port 20 under the piston 11 is closed, 17 relative closure of rodless cavity,
Hydraulic oil can only flow to lower hydraulic fluid port 20 from lower buffering oil circuit and realize lower buffering, and Fig. 2 is lower buffering hydraulic oil flow schematic diagram；It is described
When piston rod assembly is moved near cylinder cap 2, the piston 11 closes upper hydraulic fluid port, 5 relative closure of rod chamber, and hydraulic oil can only postpone
It rushes in the flow direction of chamber 4 and buffers oil circuit, flow out from upper hydraulic fluid port 24, buffered in realization, Fig. 3 is upper buffering hydraulic oil flow schematic diagram.
When oil cylinder stretches out starting, hydraulic oil flows into buffering oil circuit from lower hydraulic fluid port 20, check valve 1 is opened, from check valve one
16 flow out to rodless cavity 17, quickly stretch out starting to realize, Fig. 4 is running of hydraulic power oil schematic diagram when stretching out starting；Retraction is opened
When dynamic, hydraulic oil flows into buffering oil circuit from upper hydraulic fluid port 24, opens check valve 2 10, flows out to rod chamber 5 from check valve 2 10, real
Existing fast retractile starting, Fig. 5 are running of hydraulic power oil schematic diagram when retracting starting.
Claims (6)
1. buffering hydraulic oil cylinder, including housing assembly and piston rod assembly, the housing assembly are made of cylinder cap, cylinder and cylinder head,
The piston rod assembly is made of piston and piston rod, and one end of piston rod is connect with piston, and other end is stretched out from cylinder cap
Outside oil cylinder, it is characterised in that the housing assembly inner space is separated into rod chamber and rodless cavity by the piston, is set on cylinder
The hydraulic fluid port communicated with rodless cavity, rod chamber has been set, throttling passage, oil-through-hole are provided on piston, check valve installs stepped hole, institute
It states piston rod assembly to move near cylinder cap or cylinder head, piston closes the hydraulic fluid port on cylinder, and rod chamber or rodless cavity pass through section
Circulation road is communicated with hydraulic fluid port.
2. buffering hydraulic oil cylinder according to claim 1, it is characterised in that piston is multi-diameter shaft, the first ladder shaft diameter
Greatly, it is matched with cylinder internal diameter, the second ladder shaft diameter is small, socket-connects with the cavity in piston rod；The first multi-diameter shaft of piston is without bar
Chamber side end face center opens up the first oil-through-hole, and N number of check valve installation stepped hole one is opened up on the same circumference of this end face, living
It fills in the second ladder axial end center and opens up the second oil-through-hole, the first oil-through-hole is not communicated with the second oil-through-hole；In the first multi-diameter shaft
M check valve installation stepped hole two is opened up in the same circumferential end surfaces in rod chamber side, in the first multi-diameter shaft close to rod chamber side outer circle
Surface opens up the second throttling passage of connection check valve installation two bottom of stepped hole and the second oil-through-hole bottom, the second throttling passage
Item number is M item, corresponding with the check valve of institute connection installation stepped hole two, is opened up in the first multi-diameter shaft close to rodless cavity outer round surface
The first throttle channel of check valve installation one bottom of stepped hole and the first oil-through-hole bottom is penetrated through, first throttle channel strips number is N
Item, it is corresponding with the check valve of institute connection installation stepped hole one.
3. buffering hydraulic oil cylinder according to claim 2, it is characterised in that first throttle channel is by first segment chute, and first
Throttle orifice, the first through hole composition, the second throttling passage is by the second throttling channel, and the second throttle orifice, the second through hole forms, described
First segment chute, the second throttling channel be the first multi-diameter shaft of piston on annular groove, the first segment discharge orifice connection first segment
Chute and check valve install one bottom of stepped hole, and the second throttling channel of the second throttle orifice connection and check valve install stepped hole two
Bottom, the first through hole connection first segment discharge orifice and the first oil-through-hole bottom, the second section of the second through hole connection
Discharge orifice and the second oil-through-hole bottom, the first segment discharge orifice, the second orifice diameter is less than the first through hole, the second perforation
Hole.
4. buffering hydraulic oil cylinder according to claim 2, it is characterised in that check valve is mounted on check valve installation stepped hole
In, check valve controls hydraulic oil and flows to rod chamber or rodless cavity from throttling passage, and reversed oil circuit is obstructed.
5. buffering hydraulic oil cylinder according to claim 2, it is characterised in that the end that piston rod is connect with piston opens up
Cavity, in piston rod cavity, cavity bottom offers the major diameter being connected with rod chamber for piston the second ladder axis socket
To hole P, connection oil circuit is made of big radial hole, piston rod bottom pocket gap, the second oil-through-hole.
6. buffering hydraulic oil cylinder according to claim 1, it is characterised in that cylinder cap rod chamber side end face opens up cushion chamber, delays
Rushing chamber and piston rod has gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821996340.4U CN209621755U (en) | 2018-11-20 | 2018-11-20 | Buffering hydraulic oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821996340.4U CN209621755U (en) | 2018-11-20 | 2018-11-20 | Buffering hydraulic oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209621755U true CN209621755U (en) | 2019-11-12 |
Family
ID=68444790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821996340.4U Expired - Fee Related CN209621755U (en) | 2018-11-20 | 2018-11-20 | Buffering hydraulic oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209621755U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110617250A (en) * | 2018-11-20 | 2019-12-27 | 湖南机电职业技术学院 | Buffer hydraulic oil cylinder |
-
2018
- 2018-11-20 CN CN201821996340.4U patent/CN209621755U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110617250A (en) * | 2018-11-20 | 2019-12-27 | 湖南机电职业技术学院 | Buffer hydraulic oil cylinder |
| CN110617250B (en) * | 2018-11-20 | 2024-10-29 | 湖南机电职业技术学院 | Buffering hydraulic cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191112 Termination date: 20201120 |