CN209493285U - Fork truck buffer lift oil cylinder - Google Patents
Fork truck buffer lift oil cylinder Download PDFInfo
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- CN209493285U CN209493285U CN201821968386.5U CN201821968386U CN209493285U CN 209493285 U CN209493285 U CN 209493285U CN 201821968386 U CN201821968386 U CN 201821968386U CN 209493285 U CN209493285 U CN 209493285U
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- piston
- cylinder
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- mandril
- buffer
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Abstract
The utility model relates to hydraulic cylinders, specifically a kind of fork truck buffer lift oil cylinder, to solve oil cylinder or more buffer problem, it is made of housing assembly and piston rod assembly, piston rod assembly is made of piston rod and piston, and oil cylinder inner space is divided into rod chamber and rodless cavity by piston, and piston rod assembly opens up the connection oil circuit of connection rod chamber always and rodless cavity, cushion chamber, through hole, stepped hole are offered in piston, and mandril is installed in stepped hole；Housing assembly is made of cylinder cap, cylinder and cylinder head, has there is the cushion collar of support and buffer function in cylinder cap close to rod chamber side；When piston rod assembly is moved near cylinder cap, cushion collar closing connection oil circuit is located at the outlet in rod chamber, and cylinder cap opens mandril, and the hydraulic oil in rod chamber is flowed out from the gap in mandril and stepped hole；When piston rod assembly is moved near cylinder head, in the cushion chamber of the buffer plunger insertion piston on cylinder head, relative closure, hydraulic oil can only flow out rodless cavity from the gap that buffer plunger and cushion chamber are formed at this time.
Description
Technical field
The present invention relates to a kind of hydraulic cylinder, specifically a kind of fork truck buffer lift oil 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 cushion cylinder, this cushion cylinder not only realizes buffering up and down, but also can be with
It solves existing fork truck lifting oil cylinder to be buffered up and down there are upper buffering effect is bad, processing technology is complicated, and structure is complicated, is easy by oil
The disadvantages of dirt influences.
To solve the above-mentioned problems, the technical solution adopted by the present invention is that: this fork truck buffer lift oil cylinder includes cylinder body
Component 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
Composition.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 be in housing assembly
Portion space is divided into rod chamber and rodless cavity, and piston close to cylinder head side end face center offers cushion chamber and in the same circle of this end face
Axial step hole is opened up on week, and mandril is installed in stepped hole；In cylinder cap close to rod chamber side had support and buffer function delay
Punching set；The buffer plunger of tubular is connected on cylinder head inlet and outlet oil duct end face, the oil inlet and outlet opened up on cylinder head passes through bumper post
Plug inner passage is connected with rodless cavity；Involved piston rod assembly opens up the connection of connection rod chamber and rodless cavity oil always
Road.In the present invention, when piston rod assembly is moved near cylinder cap, the cushion collar closing connection oil circuit is located at going out in rod chamber
Mouthful, mandril is in contact with cylinder cap, and cylinder cap opens mandril, the hydraulic oil in rod chamber out of mandril and stepped hole between clearance flow
Out, because of gap, the damping action of the pressure etc. of mandril, rodless cavity hydraulic oil, the speed of rod chamber hydraulic oil outflow is reduced, is mentioned
High rod chamber hydraulic fluid pressure buffers in realization to reduce speed of the piston rod assembly when upward stroke terminates.It is described
When piston rod assembly is moved near cylinder head, in the cushion chamber of the tubular buffer plunger insertion piston on cylinder head, rodless cavity is at this time
Relative closure, hydraulic oil can only be flowed out from the buffer gap that buffer plunger and cushion chamber are formed, because there is damping to make for buffer gap
With reducing the speed that hydraulic oil is flowed out from rodless cavity, improve rodless cavity hydraulic fluid pressure, exist to reduce piston rod assembly
Speed when 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, second-order
Terraced shaft diameter is small, socket-connects with the cavity in piston rod；Piston cylinder head side end face center opens up cushion chamber and in the same of this end face
N number of axial step hole is opened up on one circumference, opens up through hole from piston other end center, and through hole is communicated with cushion chamber, is delayed
It rushes chamber diameter and is greater than perforation bore dia, and guarantee that stepped hole is not communicated with through hole, cushion chamber.
In above-mentioned cushion cylinder, the stepped hole penetrates through the first multi-diameter shaft of piston, and there are two ladder, rodless cavities for stepped hole
Side steps hole is maximum, and rod chamber side steps hole is minimum, and stepped hole successively installs spring base, bullet into rod chamber side from rodless cavity side
Spring and mandril, mandril reach in rod chamber from stepped hole.
In above-mentioned cushion cylinder, the mandril includes the features such as elongated shaft, cone, short axle, and spring base opens up axial logical
Hole, piston stepped hole minimum aperture aperture are greater than the elongated shaft diameter of mandril, are less than cone maximum gauge, and spring one end compresses mandril,
The mandril conical surface is pressed on stepped hole ladder, spring other end holddown spring seat, spring base and stepped hole are connected using screw thread
It connects, by adjusting stepped hole number, stepped hole minimum-value aperture and the fit clearance of mandril elongated shaft, spring rate, spring-compressed
Size equivalence is measured to adjust the buffering effect in upper buffering course.
In above-mentioned cushion cylinder, the end that the piston rod is connect with piston has opened up cavity, the cavity and piston
Second multi-diameter shaft socket-connects, and cavity bottom offers the big radial hole being connected with rod chamber, and the number of big radial hole and hole are big
Small to be advisable with the oil filling capacity for guaranteeing cylinder rod chamber, connection oil circuit is by big radial hole, piston rod bottom pocket gap, through hole
It constitutes.
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.
Detailed description of the invention
The cross section view of Fig. 1 fork truck buffer lift 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, through hole 6, buffering
Chamber 7, mandril 8, piston 9, stepped hole 10, spring 11, spring base 12, rodless cavity 13, oil inlet and outlet 14, cylinder head 15, buffer plunger
16, cavity bottom gap 17, cushion collar 18.
Specific embodiment
Illustrate specific embodiment with reference to the accompanying drawing.
As shown in Figure 1, the fork truck buffer lift oil cylinder in the present embodiment, including housing assembly is by cylinder cap 1, cylinder 2 and cylinder
First 15 composition, the piston rod assembly are made of piston 9 and piston rod 3.One end of piston rod 3 is connect with piston 9, other end
It is stretched out outside oil cylinder from cylinder cap 1, housing assembly inner space is divided into rod chamber 4 and rodless cavity 13, piston 9 by the piston 9
It offers cushion chamber 7 close to 15 side end face center of cylinder head and opens up axial step hole 10, ladder on the same circumference of this end face
Mandril 8 is installed in hole 10；There is the cushion collar 18 of support and buffer function in cylinder cap 1 close to 4 side of rod chamber；Cylinder head 15 is imported and exported
The buffer plunger 16 of tubular is connected on oil duct end face, the oil inlet and outlet 14 opened up on cylinder head 15 passes through inside buffer plunger 16
Channel is connected with rodless cavity 13；Involved piston rod assembly opens up the connection of connection rod chamber 4 and rodless cavity 13 oil always
Road.When the piston rod assembly is moved near cylinder cap 1, the cushion collar 18 closes connection oil circuit and is located at the outlet in rod chamber,
Mandril 8 is in contact with cylinder cap 1, and cylinder cap 1 opens mandril 8, between the hydraulic oil in rod chamber 4 is out of mandril 8 and stepped hole 10
Clearance flow goes out, and realizes the upper buffering of oil cylinder, and Fig. 3 is buffering hydraulic oil flow schematic diagram on oil cylinder.The piston rod assembly is moved to
When near cylinder head 15, the tubular buffer plunger 16 on cylinder head 15 is inserted into the cushion chamber 7 of piston, and rodless cavity 13 is opposite at this time to be sealed
It closes, hydraulic oil can only be flowed out from the buffer gap that buffer plunger 16 and cushion chamber 7 are formed, and realized and buffered under oil cylinder, Fig. 2 is oil cylinder
Lower buffering hydraulic oil flow schematic diagram.
As shown in Figure 1, piston 9 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 3；9 cylinder head side end face center of piston opens up cushion chamber 7 and the same circumference in this end face
On open up 3 axial step holes 10, open up through hole 6 from 9 other end center of piston, through hole 6 is communicated with cushion chamber 7, delay
7 diameter of chamber is rushed greater than 6 diameter of through hole.
As shown in Figure 1, stepped hole 10 penetrates through 9 first multi-diameter shaft of piston, stepped hole 10 there are two ladder, stepped hole 10 from
13 side of rodless cavity successively installs spring base 12, spring 11 and mandril 8 into 4 side of rod chamber, and mandril 8 is reached out of stepped hole 10
In rod chamber 4.
As shown in Figure 1, mandril 8 includes that features, the spring bases 12 such as elongated shaft, cone, short axle open up axially extending bore, piston rank
There are fit clearances for terraced 10 minimum aperture of hole and the cooperation of 8 elongated shaft of mandril, and 11 one end of spring compresses mandril 8,8 conical surface pressure of mandril
Tightly on 10 ladder of stepped hole, 11 other end holddown spring seat 12 of spring, spring base 12 is used with stepped hole 10 and is threadedly coupled.
As shown in Figure 1, the end that piston rod 3 is connect with piston 9 has opened up cavity, the cavity and 9 second ladder of piston
Axis socket-connects, and cavity bottom offers the big radial hole 5 being connected with rod chamber 4, and connection oil circuit is by big radial hole 5, piston rod
Bottom pocket gap 17, through hole 6 are constituted.
As shown in Figure 1, buffer plunger 16 is located in oil cylinder rodless cavity 13, the buffer gap in lower buffering course is by buffering
16 outer surface of plunger is formed with gap composed by 7 inner surface of cushion chamber.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
Range should not be construed as being limited to the specific forms stated in the embodiments, and protection scope of the present invention is also included in this field skill
Art personnel conceive according to the present invention it is conceivable that equivalent technologies mean.
Claims (6)
1. fork truck buffer lift oil cylinder, including housing assembly and piston rod assembly, the housing assembly is by cylinder cap, cylinder and cylinder head group
At the piston rod assembly is made of piston and piston rod, and piston rod assembly opens up the connection of connection rod chamber and rodless cavity always
Logical oil circuit, one end of piston rod are connect with piston, and other end is stretched out outside oil cylinder from cylinder cap, it is characterised in that the piston
Housing assembly inner space is divided into rod chamber and rodless cavity, piston offers cushion chamber and herein close to cylinder head side end face center
Axial step hole is opened up on the same circumference of end face, and mandril is installed in stepped hole；In cylinder cap close to rod chamber side had support with
The cushion collar of buffer function；The buffer plunger of tubular, the disengaging oil opened up on cylinder head are connected on cylinder head inlet and outlet oil duct end face
Mouth is connected by buffer plunger inner passage with rodless cavity；When the piston rod assembly is moved near cylinder cap, the buffering sleeve
Seco leads to oil circuit and is located at the outlet in rod chamber, and mandril is in contact with cylinder cap, and cylinder cap opens mandril, the hydraulic oil in rod chamber
It is flowed out from the gap in mandril and stepped hole；Tubular bumper post when the piston rod assembly is moved near cylinder head, on cylinder head
In the cushion chamber of plug insertion piston, relative closure, hydraulic oil can only form slow rodless cavity from buffer plunger and cushion chamber at this time
Rush gap outflow.
2. fork truck buffer lift oil cylinder according to claim 1, it is characterised in that piston is multi-diameter shaft, and the first multi-diameter shaft is straight
Diameter is big, matches with cylinder, and the second ladder shaft diameter is small, socket-connects with the cavity in piston rod, and piston cylinder head side end face center is opened
If cushion chamber simultaneously opens up N number of axial step hole on the same circumference of this end face, through hole is opened up from piston other end center,
Through hole is communicated with cushion chamber, and cushion chamber diameter is greater than perforation bore dia.
3. fork truck buffer lift oil cylinder according to claim 1, it is characterised in that stepped hole penetrates through the first multi-diameter shaft of piston,
For stepped hole there are two ladder, rodless cavity side steps hole is maximum, and rod chamber side steps hole is minimum, and stepped hole is from rodless cavity side to there is bar
Spring base, spring and mandril are successively installed, mandril reaches in rod chamber from stepped hole in chamber side.
4. fork truck buffer lift oil cylinder according to claim 3, it is characterised in that mandril includes elongated shaft, cone, short axle,
Spring base opens up axially extending bore, and piston stepped hole minimum aperture aperture is greater than the elongated shaft diameter of mandril, is less than cone maximum gauge, bullet
Spring one end compresses mandril, the mandril conical surface is pressed on stepped hole ladder, spring other end holddown spring seat, spring base and rank
Terraced hole is using threaded connection.
5. fork truck buffer lift oil cylinder according to claim 1, it is characterised in that open the end that piston rod is connect with piston
If cavity, the cavity socket-connect with the second multi-diameter shaft of piston, cavity bottom offers the big radial direction being connected with rod chamber
Hole, connection oil circuit are made of big radial hole, piston rod bottom pocket gap, through hole.
6. fork truck buffer lift oil cylinder according to claim 1, it is characterised in that it is intracavitary that buffer plunger is located at oil cylinder rodless,
Buffer gap in lower buffering course 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 |
|---|---|---|---|
| CN201821968386.5U CN209493285U (en) | 2018-11-16 | 2018-11-16 | Fork truck buffer lift oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821968386.5U CN209493285U (en) | 2018-11-16 | 2018-11-16 | Fork truck buffer lift oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209493285U true CN209493285U (en) | 2019-10-15 |
Family
ID=68151973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821968386.5U Expired - Fee Related CN209493285U (en) | 2018-11-16 | 2018-11-16 | Fork truck buffer lift oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209493285U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111288040A (en) * | 2020-03-26 | 2020-06-16 | 湖南机电职业技术学院 | Oil cylinder with ultrahigh pressure sealing structure |
| CN113236631A (en) * | 2021-05-19 | 2021-08-10 | 中国船舶重工集团公司第七一三研究所 | Piston of anti-impact oil cylinder |
-
2018
- 2018-11-16 CN CN201821968386.5U patent/CN209493285U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111288040A (en) * | 2020-03-26 | 2020-06-16 | 湖南机电职业技术学院 | Oil cylinder with ultrahigh pressure sealing structure |
| CN113236631A (en) * | 2021-05-19 | 2021-08-10 | 中国船舶重工集团公司第七一三研究所 | Piston of anti-impact oil 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: 20191015 Termination date: 20201116 |