CN209507501U - It is a kind of with the fork truck lifting oil cylinder buffered up and down - Google Patents
It is a kind of with the fork truck lifting oil cylinder buffered up and down Download PDFInfo
- Publication number
- CN209507501U CN209507501U CN201821825363.9U CN201821825363U CN209507501U CN 209507501 U CN209507501 U CN 209507501U CN 201821825363 U CN201821825363 U CN 201821825363U CN 209507501 U CN209507501 U CN 209507501U
- Authority
- CN
- China
- Prior art keywords
- piston
- piston rod
- hole
- cylinder
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Actuator (AREA)
Abstract
The utility model relates to hydraulic cylinders, it is specifically a kind of with the fork truck lifting oil cylinder buffered up and down, it is made of housing assembly and piston rod assembly, piston rod assembly is made of piston rod and piston, oil cylinder inner space is divided into rod chamber and rodless cavity by piston, piston rod assembly opens up the connection oil circuit of connection rod chamber always and rodless cavity and plays the buffering oil circuit of upper buffer function, and piston opens up cushion chamber, through hole, stepped hole, installs check valve in stepped hole；Housing assembly is made of cylinder cap, cylinder and cylinder head, and cushion collar is installed in cylinder cap；When piston rod assembly is moved near cylinder cap, cushion collar closing connection oil circuit is located at the outlet in rod chamber, and hydraulic oil acts on check valve from N row's radial hole inflow on piston rod, opens check valve outflow；When piston rod assembly is moved near cylinder head, the tubular buffer plunger insertion buffer piston on cylinder head is intracavitary, and relative closure, hydraulic oil flow out rodless cavity from the gap that buffer plunger and cushion chamber are formed at this time.
Description
Technical field
It is specifically a kind of with the fork truck lifting oil 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.
Existing fork truck lifting oil cylinder is all largely the structure of leukorrhagia buffering, and this structure can only protect lift oil tank to exist
It is buffered during decline, guarantee to make during decline piston and cylinder head does not occur hard hit.The raising that band buffers up and down
Oil cylinder is considerably less, and the upper buffering that patent CN104595281M is used is processed by being processed on a circle aperture and piston on piston rod
Elongated hole throttles to realize, this buffering cannot generate the buffering of gradual change, and buffering effect is bad, and elongated hole technique is processed on piston
It is relatively difficult to achieve, and this cushion cylinder is easy to be influenced by greasy dirt, is difficult to adjust buffering.
Summary of the invention
The object of the present invention is to provide a kind of forklift lifting cushion cylinder, this cushion cylinder not only realizes buffering up and down,
And can solve current fork truck lifting oil cylinder and buffer that there are buffering effects is bad up and down, processing technology is complicated, is easy by greasy dirt
The disadvantages of influence.
To solve the above-mentioned problems, the technical solution adopted by the present invention is that: it is this with buffer up and down forklift lifting oil
Cylinder includes housing assembly and piston rod assembly, and the housing assembly is made of cylinder cap, cylinder and cylinder head, and the piston rod assembly is by living
Plug is formed with piston rod.One end of piston rod is connect with piston, and other end is stretched out outside oil cylinder from cylinder cap, and the piston will
The housing assembly inner space is separated into rod chamber and rodless cavity, and piston rodless cavity end face opens up cushion chamber, the piston other end
Face opens up the stepped hole for being equipped with check valve；It is connected with the buffer plunger of tubular on cylinder head inlet and outlet oil duct end, is opened on cylinder head
If oil inlet and outlet be connected with rodless cavity by buffer plunger inner passage；Opened up on piston rod assembly always connection rod chamber and
The connection oil circuit of rodless cavity and the buffering oil circuit for playing upper buffer function have had in cylinder cap close to rod chamber side and have supported and buffer function
Cushion collar.In the present invention, when piston rod assembly is moved near cylinder cap, upper cushion collar encloses connection oil circuit and is arranged in rod chamber
Interior outlet, cushion collar and piston rod assembly form the cavity of an opposing seal, and hydraulic oil can only be from piston rod close to living
The N row's radial hole for filling in side flows into, and acts on check valve, opens check valve by hydraulic fluid pressure, flow out from connection oil circuit,
Because of the damping action of aperture and check valve, the speed of rod chamber hydraulic oil outflow is reduced, rod chamber hydraulic fluid pressure is improved,
To reduce speed of the piston rod assembly when upward stroke terminates, buffered in realization.When piston rod assembly moves near cylinder head
When, in the cushion chamber in buffer plunger insertion piston on cylinder head, the hydraulic oil of rodless cavity can only be from buffer plunger and slow at this time
The buffer gap outflow for rushing chamber formation reduces the speed that hydraulic oil is flowed out from rodless cavity because buffer gap has damping action,
Rodless cavity hydraulic fluid pressure is improved, to reduce speed of the piston rod assembly in lower liter of stroke end, realizes lower buffering.
In above-mentioned cushion cylinder, the piston is 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 rodless cavity end face center opens up cushion chamber, opens from other end center
If through hole, through hole is communicated with cushion chamber, and cushion chamber diameter is greater than perforation bore dia, while same on piston perforation hole end surface
The stepped hole of M assembly check valve is uniformly opened up on one circumference, there are two ladders for stepped hole, ladder big close to end surface side diameter
Hole base diameter is small, and piston the second multi-diameter shaft outer surface nearby opens up annular groove close to the first multi-diameter shaft, and opens up perforation annular
The radial hole of slot and stepped hole bottom.
In above-mentioned cushion cylinder, the buffer gap is by the inner surface of cushion chamber in buffer plunger outer surface and piston
It is formed, the buffer requirements under different operating conditions is met by the size and the length of buffer plunger that change buffer gap.
Above-mentioned cushion cylinder, the end that the piston rod is connect with piston have opened up cavity, cavity and the second ladder of piston
Axis socket-connects, and cavity bottom offers the big radial hole being connected with rodless cavity, and the number and hole size of big radial hole are to guarantee
The oil filling capacity of cylinder rod chamber is advisable, and connection oil circuit is made of big radial hole, piston rod bottom pocket gap, through hole；It is living
Stopper rod cavity front end opens up N row's radial hole, and radial hole penetrates through piston rod cavity.
Above-mentioned cushion cylinder, N row radial hole that the upper buffering oil circuit is opened up by piston rod cavity front end, piston the
Annular groove, radial hole, the stepped hole on two multi-diameter shaft surfaces are constituted, and check valve is mounted in stepped hole, and check valve control is hydraulic
Oil flows to the radial hole of piston rod cavity front end from rod chamber, then flows to annular groove, radial hole, stepped hole, finally from passing through
Through-hole outflow, reversed oil circuit are obstructed.By on piston rod in the distribution of radial hole, number, radial hole size and piston it is single
It realizes to valve number, check valve pre-compression force size and is buffered in gradual change.
Detailed description of the invention
The cross section view of Fig. 1 fork truck lifting oil cylinder of the present invention
Buffering hydraulic oil flow schematic diagram under Fig. 2 cushion cylinder
Buffering hydraulic oil flow schematic diagram on Fig. 3 cushion cylinder
Parts title and serial number in figure: cylinder cap 1, cylinder 2, piston rod 3, rod chamber 4, big radial hole 5, check valve 6, N row
Radial hole 7, piston 8, rodless cavity 9, cylinder head 10, oil inlet and outlet 11, buffer plunger 12, cushion chamber 13, ring shaped slot 14 are radial small
Hole 15, cavity bottom gap 16, through hole 17, cushion collar 18.
Specific embodiment
Illustrate specific embodiment with reference to the accompanying drawing.
As shown in Figure 1, the fork truck lifting oil cylinder in the present embodiment, including housing assembly and piston rod assembly, the cylinder
Body component is made of cylinder cap 1, cylinder 2 and cylinder head 10, and the piston rod assembly is made of piston 8 and piston rod 3.The one of piston rod 3
End connect with piston 8, other end is stretched out outside oil cylinder from cylinder cap 1, the piston 3 by the housing assembly inner space every
At rod chamber 4 and rodless cavity 9, cushion chamber 13 is offered inside piston 3, and the buffer plunger 12 of tubular, cylinder are connected on cylinder head 10
The oil inlet and outlet 11 opened up on first 3 is connected by 12 inner passage of buffer plunger with rodless cavity 9；It is opened up always on piston rod assembly
The connection oil circuit of connection rod chamber 4 and rodless cavity 9 goes up a buffering oil circuit for buffer function with rising, and has in cylinder cap 1 close to 4 side of rod chamber
Play the cushion collar 18 of support and buffer function.When the piston 8 is moved near cylinder cap 1, cushion collar 18 is formed with piston rod assembly
The cavity of one opposing seal, hydraulic oil can only arrange the inflow of radial hole 7 close to the N of piston side from piston rod 3 and act on list
To on valve 6, check valve 6 is opened by hydraulic fluid pressure, is buffered in realization, the flow schematic diagram of hydraulic oil when Fig. 3 is upper buffering.
When the piston rod assembly is moved near cylinder head 10, the buffer plunger 12 on cylinder head is inserted into the cushion chamber 13 in piston, hydraulic
Oil can only be flowed out from the buffer gap that buffer plunger 12 and cushion chamber 13 are formed, and realize lower buffering, hydraulic oil when Fig. 2 is lower buffering
Flow schematic diagram.
As shown in Figure 1, piston 8 is multi-diameter shaft, the first ladder shaft diameter is big, matches with cylinder 2, the second ladder shaft diameter
It is small, it socket-connects with the cavity in piston rod；Piston 8 opens up cushion chamber 13 close to 10 side end face center of cylinder head, from other side end
Face center opens up through hole 17 and communicates with cushion chamber 13, and the ladder of M assembly check valve is uniformly opened up on the same circumference in this side
Annular groove 14, the radial hole 15 that stepped hole bottom opens up is arranged in hole, piston the second multi-diameter shaft outer surface at the first ladder
Penetrate through stepped hole and annular groove 14.
As shown in Figure 1, buffer gap is formed by 12 outer surface of buffer plunger and the inner surface of cushion chamber 13 in piston, lead to
The length of the size and buffer plunger 12 that change buffer gap is crossed to meet the buffer requirements under different operating conditions.
As shown in Figure 1, the end of piston rod 3 and the second ladder of piston axis connection has opened up cavity, the cavity and piston
Second multi-diameter shaft socket-connects, and cavity bottom offers the big radial hole 5 being connected with rodless cavity, connection oil circuit by big radial hole 5,
Piston rod bottom pocket gap 16, through hole 17 are constituted；Piston rod cavity front end opens up N row's radial hole 7 of perforation cavity.
As shown in Figure 1, upper buffering oil circuit arranges radial hole 7, annular groove 14, diameter by the N that piston rod cavity front end opens up
It is constituted to aperture 15, way valve passageway (stepped hole), wherein check valve 6 is mounted in way valve passageway (stepped hole).Pass through work
The distribution of radial hole 7, number, 6 numbers of 7 size of radial hole and piston internal check valve, 6 pre-compression force of check valve on stopper rod 3
Size buffers in gradual change to realize.
Claims (5)
1. a kind of with the fork truck lifting oil cylinder buffered up and down, including housing assembly and piston rod assembly, the housing assembly by
Cylinder cap, cylinder and cylinder head composition, the piston rod assembly are made of piston and piston rod, and one end of piston rod is connect with piston, separately
Outer one end is stretched out outside oil cylinder from cylinder cap, it is characterised in that the housing assembly inner space has been separated into bar by the piston
Chamber and rodless cavity, piston rodless cavity end face open up cushion chamber, and piston other end opens up the stepped hole for being equipped with check valve and passes through
Through-hole；The buffer plunger of tubular is connected on cylinder head inlet and outlet oil duct end, the oil inlet and outlet opened up on cylinder head passes through bumper post
Plug inner passage is connected with rodless cavity；The connection oil circuit of connection rod chamber always and rodless cavity is opened up on piston rod assembly and is risen
The buffering oil circuit of buffer function has had the cushion collar of support with buffer function in cylinder cap close to rod chamber side；The piston moves to
When near cylinder cap, the cavity of cushion collar and piston rod assembly one opposing seal of formation, hydraulic oil can only be close from piston rod
N row's radial hole of piston side flows into, and acts on check valve, opens check valve by hydraulic fluid pressure, buffers in realization；Institute
When stating piston and moving near cylinder head, in the cushion chamber in buffer plunger insertion piston on cylinder head, hydraulic oil can only be from bumper post
Plug is flowed out with the buffer gap that cushion chamber is formed, and realizes lower buffering.
2. lift oil tank according to claim 1, it is characterised in that piston is multi-diameter shaft, and the first ladder shaft diameter is big, with
Cylinder barrel matches, and the second ladder shaft diameter is small, socket-connects with the cavity in piston rod；Piston rodless cavity end face center opens up buffering
Chamber opens up through hole from other end center, and through hole is communicated with cushion chamber, and cushion chamber diameter is greater than perforation bore dia, simultaneously
The stepped hole of M assembly check valve is uniformly opened up on same circumference on piston perforation hole end surface, there are two ladders for stepped hole, lean on
Proximal end surface side diameter is big, and stepped hole base diameter is small, and piston the second multi-diameter shaft outer surface nearby opens up ring close to the first multi-diameter shaft
Shape slot, and open up the radial hole of perforation annular groove and stepped hole bottom.
3. lift oil tank according to claim 2, it is characterised in that the end that piston rod is connect with piston has opened up cavity,
The cavity socket-connects with the second multi-diameter shaft of piston, and cavity bottom offers the big radial hole being connected with rod chamber, connection oil
Route big radial hole, piston rod bottom pocket gap, through hole composition；Piston rod cavity front end opens up N row's radial hole, diameter
Piston rod cavity is penetrated through to aperture.
4. lift oil tank according to claim 3, it is characterised in that above buffer oil circuit and opened up by piston rod cavity front end
N arrange radial hole, the annular groove on the second multi-diameter shaft of piston surface, the radial hole on the second multi-diameter shaft of piston, stepped hole structure
At, check valve is mounted in stepped hole, and check valve control hydraulic oil flows to the radial hole of piston rod cavity front end from rod chamber,
Annular groove, radial hole are flowed to again, and stepped hole is finally flowed out from through hole, and reversed oil circuit is obstructed.
5. lift oil tank according to claim 1, buffer plunger is located at the buffering that oil cylinder rodless is intracavitary, in lower buffering course
Gap is formed as buffer plunger outer surface and gap composed by buffer piston inner cavity surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821825363.9U CN209507501U (en) | 2018-10-31 | 2018-10-31 | It is a kind of with the fork truck lifting oil cylinder buffered up and down |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821825363.9U CN209507501U (en) | 2018-10-31 | 2018-10-31 | It is a kind of with the fork truck lifting oil cylinder buffered up and down |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209507501U true CN209507501U (en) | 2019-10-18 |
Family
ID=68192240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821825363.9U Expired - Fee Related CN209507501U (en) | 2018-10-31 | 2018-10-31 | It is a kind of with the fork truck lifting oil cylinder buffered up and down |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209507501U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114562496A (en) * | 2022-01-29 | 2022-05-31 | 江苏永祥液压设备有限公司 | High-pressure large-flow hydraulic oil cylinder |
-
2018
- 2018-10-31 CN CN201821825363.9U patent/CN209507501U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114562496A (en) * | 2022-01-29 | 2022-05-31 | 江苏永祥液压设备有限公司 | High-pressure large-flow hydraulic oil cylinder |
| CN114562496B (en) * | 2022-01-29 | 2022-11-29 | 江苏永祥液压设备有限公司 | Hydraulic oil cylinder |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2615406Y (en) | Piston type single-action damper hydraulic cylinder | |
| CN105443491B (en) | Fork truck lifting oil cylinder | |
| CN102072146B (en) | Valve with valve closure body | |
| CN108506404A (en) | A kind of large hydraulic damper | |
| CN201991879U (en) | Hydraulic cylinder buffering device | |
| CN201747698U (en) | Cushioning device for hydraulic cylinder | |
| CN209507501U (en) | It is a kind of with the fork truck lifting oil cylinder buffered up and down | |
| CN110617250A (en) | Buffer hydraulic oil cylinder | |
| CN209493285U (en) | Fork truck buffer lift oil cylinder | |
| CN204113991U (en) | Liquid and gas damper | |
| CN206320112U (en) | A kind of damping oil cylinder | |
| CN201636118U (en) | Floating self-adjustment buffering hydraulic cylinder | |
| CN107965605A (en) | A kind of gerotor type air bleeding valve | |
| CN207033881U (en) | A kind of controllable cushion cylinder of hydraulic pressure | |
| CN102052299B (en) | Piston pump valve with valve closing body | |
| CN208778389U (en) | A kind of reach oil cylinder front and back buffer structure | |
| CN214661236U (en) | Multi-stage plunger oil cylinder | |
| CN201391511Y (en) | Hydraulic cylinder cushioning device | |
| CN106122344A (en) | Vibroshock | |
| CN208778390U (en) | A kind of dump ram front and back buffer structure | |
| CN212954085U (en) | Hydraulic device with buffering function | |
| CN209621755U (en) | Buffering hydraulic oil cylinder | |
| CN207093646U (en) | Ultra-Low Speed hydraulic pressure gas spring | |
| CN209129963U (en) | Oil cylinder with floating buffer structure | |
| CN210013881U (en) | Porous buffering hydraulic cylinder |
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: 20191018 Termination date: 20201031 |