CN110159615A - The working cylinder of cushion collar and the hydraulic device using the cushion collar - Google Patents
The working cylinder of cushion collar and the hydraulic device using the cushion collar Download PDFInfo
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- CN110159615A CN110159615A CN201910345136.9A CN201910345136A CN110159615A CN 110159615 A CN110159615 A CN 110159615A CN 201910345136 A CN201910345136 A CN 201910345136A CN 110159615 A CN110159615 A CN 110159615A
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- Prior art keywords
- cushion collar
- oil groove
- piston
- plug
- oil
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
- F15B15/221—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke for accelerating the stroke, e.g. by area increase
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2215/00—Fluid-actuated devices for displacing a member from one position to another
- F15B2215/30—Constructional details thereof
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The working cylinder of hydraulic device the present invention relates to cushion collar and using the cushion collar, cushion collar which is provided with the inner hole of the buffer shaft insertion for piston for being arranged between the block step and plug of the working cylinder of hydraulic device；The end face that cushion collar is remotely located from one end of plug is equipped with logical oil groove, and the logical oil groove is connected with the inner hole of cushion collar.Between the block step and plug of the working cylinder that cushion collar of the invention is used to that hydraulic device to be arranged in, in the working cylinder starting of hydraulic device, oil liquid can enter logical oil groove by the gap between piston and cushion collar inner hole, there is impetus to piston into the oil liquid in logical oil groove, compared with prior art, initial oil liquid is increased to the active area of piston, to can increase the movement speed of piston, reach the startup power for improving the working cylinder of hydraulic device, improves the effect of the starting speed of the working cylinder of hydraulic device.
Description
Technical field
The working cylinder of hydraulic device the present invention relates to cushion collar and using the cushion collar.
Background technique
Hydraulic actuating mechanism utilizes the incompressible principle of liquid, and high pressure oil is sent into working cylinder two sides to realize breaker
Divide-shut brake, the hydraulic actuating mechanism of the breaker as disclosed in the application for a patent for invention of Publication No. CN101527206A.
As depicted in figs. 1 and 2, the working cylinder of hydraulic actuating mechanism includes that cylinder body 1, guiding movement are assemblied in the prior art
Piston 2 in the plunger shaft of cylinder body 1 blocks plug 4 in plunger shaft one end, and is axially moveable and is assemblied in plunger shaft
Cushion collar 3.The course of work of the working cylinder when hydraulic actuating mechanism closes a floodgate starting is: oil liquid passes through the center of plug 4 from Z chamber 6
Hole enters working cylinder lower part, pushes cushion collar 3 and piston 2 to move upwardly together the stroke of L2, cushion collar 3 is by plunger shaft later
Block step block, oil liquid enters plunger shaft from the gap between the oil-through hole 5 and cushion collar 3 and piston 2 of cushion collar 3
In, push piston 2 to continue to move to the direction far from plug.
Above-mentioned working cylinder has the following problems: when closing operation, after the stroke of the mobile L2 of cushion collar 3, piston 2 is not yet tied
When the stroke of beam L1, because the sectional area in the gap between the oil-through hole 5 and cushion collar 3 and piston 2 of cushion collar 3 is much smaller than work
The anchor ring product of plug 2, causes fuel delivery in plunger shaft insufficient, and 2 startup power of piston is insufficient, and " creeping " phenomenon occurs in piston 2, and then leads
Cause closing time is elongated or closing time is unstable.
Summary of the invention
The purpose of the present invention is to provide a kind of cushion collars, when being started with solving the working cylinder of hydraulic device in the prior art
Start slow technical problem；The object of the invention is also to provide a kind of working cylinders of hydraulic device to solve the above problems.
Cushion collar of the invention adopts the following technical scheme that
Cushion collar which is provided with for being arranged between the block step and plug of the working cylinder of hydraulic device for the slow of piston
Rush the inner hole of axis insertion；
The end face that cushion collar is remotely located from one end of plug is equipped with logical oil groove, and the logical oil groove is connected with the inner hole of cushion collar
It is logical.
The beneficial effect of cushion collar of the invention is: cushion collar of the invention is used to be arranged in the working cylinder of hydraulic device
Between block step and plug, in the working cylinder starting of hydraulic device, oil liquid can be by between piston and cushion collar inner hole
Gap enters logical oil groove, has impetus to piston into the oil liquid in logical oil groove, compared with prior art, increases initial
Oil liquid reaches the starting for improving the working cylinder of hydraulic device to can increase the movement speed of piston to the active area of piston
Power improves the effect of the starting speed of the working cylinder of hydraulic device.
For further increase hydraulic device working cylinder startup power, described in this programme lead to oil groove circumferentially set along cushion collar
There are two more than, while guaranteeing cushion collar structural strength, the quantity for leading to oil groove is more, acting surface of the initial oil liquid to piston
Product is bigger, and the startup power of the working cylinder of hydraulic device is bigger.
To guarantee piston stress balance, increase the job stability of the working cylinder of hydraulic device, each logical oil groove in this programme
It is circumferentially uniformly distributed along cushion collar.
For further increase hydraulic device working cylinder startup power, cushion collar described in this programme is for along the axial cylinder
Activity setting, be additionally provided on cushion collar along axially through oil-through hole, the oil-through hole is when cushion collar and plug block cooperate
It is blocked by the block end face of plug, when cushion collar leaves the block end face of plug, oil liquid can enter plunger shaft from oil-through hole
Ejector piston is mobile, further increases oil liquid to the active area of piston, is conducive to the starting for improving the working cylinder of hydraulic device
Power.
For further increase hydraulic device working cylinder startup power, the oil-through hole and cross oil groove in cushion collar circumferential direction
It is staggeredly arranged, in this way, the oil liquid at oil-through hole and the oil liquid at logical oil groove act at the different location of piston, is conducive to increase
Oil liquid improves the startup power of the working cylinder of hydraulic device to the active area of piston.
For further increase hydraulic device working cylinder startup power, cushion collar described in this programme is for along the axial cylinder
Activity setting, the lateral wall of cushion collar were equipped with oil groove, crossed oil groove and formed opening in the both ends of the surface of cushion collar, cross oil groove
For the opening of one end for being connected with plunger shaft, another end opening for crossing oil groove is used for the quilt when cushion collar and plug block cooperate
The block end face of plug blocks, and the logical oil groove is connected with oil groove is crossed, and after cushion collar leaves block end face, oil liquid can be from mistake
Oil groove enters in plunger shaft, further increases the fuel delivery to plunger shaft, to increase the motive force of piston, increases liquid
The startup power of the working cylinder of pressure device improves the starting speed of the working cylinder of hydraulic device；In addition, oil liquid can also be from oil groove stream excessively
To logical oil groove, guarantees the fuel delivery of logical oil groove, guarantee the startup power of the working cylinder of hydraulic device.
For the flow area for further increasing cushion collar, the notch that oil groove is crossed described in this programme is flaring, and notch is close
The width of slot bottom is less than the width far from slot bottom.
For convenience of the processing for crossing oil groove, two V-shaped settings of groove sidewall of oil groove are crossed described in this programme.
To avoid stress at oil groove slot bottom from concentrating, the structural strength of cushion collar is influenced, oil groove tool is crossed described in this programme
There is the groove bottom wall being connected between two groove sidewalls of oil groove.
The working cylinder of hydraulic device of the invention adopts the following technical scheme that
The working cylinder of hydraulic device includes cylinder body and piston；
Plunger shaft is equipped in cylinder body, guiding activity is assemblied in plunger shaft piston along the axial cylinder, and plunger shaft is used for and piston
The inner wall of the corresponding one end in cushion stroke end is equipped with block step, and the end at the end is equipped with plug；
Plug which is provided with the centre bore for the buffer shaft insertion on piston；
Cushion collar is arranged in along the axial cylinder between block step and plug, which is provided in the buffer shaft insertion for piston
Hole；
The end face of the one end of cushion collar far from plug is equipped with logical oil groove, and the logical oil groove is connected with the inner hole of cushion collar.
The beneficial effect of the working cylinder of hydraulic device of the invention is: in the working cylinder starting of hydraulic device, oil liquid can
Enter logical oil groove by the gap between piston and cushion collar inner hole, has to push to piston into the oil liquid in logical oil groove and make
With compared with prior art, increasing initial oil liquid to the active area of piston, to can increase the movement speed of piston, reach
To the startup power for the working cylinder for improving hydraulic device, the effect of the starting speed of the working cylinder of hydraulic device is improved.
For further increase hydraulic device working cylinder startup power, described in this programme lead to oil groove circumferentially set along cushion collar
There are two more than, while guaranteeing cushion collar structural strength, the quantity for leading to oil groove is more, acting surface of the initial oil liquid to piston
Product is bigger, and the startup power of the working cylinder of hydraulic device is bigger.
To guarantee piston stress balance, increase the job stability of the working cylinder of hydraulic device, each logical oil groove in this programme
It is circumferentially uniformly distributed along cushion collar.
For further increase hydraulic device working cylinder startup power, cushion collar described in this programme is movable along the axial cylinder
Setting has the block end face for cooperate with cushion collar block on plug, be additionally provided on cushion collar edge axially through it is excessively oily
Hole, the oil-through hole are blocked when cushion collar and plug block cooperate by the block end face of plug.Plug is left in cushion collar
When block end face, oil liquid can enter the movement of plunger shaft ejector piston from oil-through hole, further increase effect of the oil liquid to piston
Area is conducive to the startup power for improving the working cylinder of hydraulic device.
For further increase hydraulic device working cylinder startup power, the oil-through hole and cross oil groove in cushion collar circumferential direction
It is staggeredly arranged, in this way, the oil liquid at oil-through hole and the oil liquid at logical oil groove act at the different location of piston, is conducive to increase
Oil liquid improves the startup power of the working cylinder of hydraulic device to the active area of piston.
For further increase hydraulic device working cylinder startup power, cushion collar described in this programme is movable along the axial cylinder
It is arranged, there is the block end face for cooperating with cushion collar block, the lateral wall of cushion collar was equipped with oil groove, excessively oily on plug
Slot forms opening in the both ends of the surface of cushion collar, crosses the opening of one end of oil groove for being connected with plunger shaft, crosses the another of oil groove
It is open at one end for being blocked when cushion collar and plug block cooperate by the block end face of plug, the logical oil groove with oil groove phase
Connection.After cushion collar leaves block end face, oil liquid can enter in plunger shaft from oil groove is crossed, and further increase to plunger shaft
Fuel delivery increases the startup power of the working cylinder of hydraulic device to increase the motive force of piston, improves the work of hydraulic device
Make the starting speed of cylinder；In addition, oil liquid can also flow to logical oil groove from oil groove is crossed, guarantees the fuel delivery of logical oil groove, guarantee hydraulic dress
The startup power for the working cylinder set.
For the flow area for further increasing cushion collar, the notch that oil groove is crossed described in this programme is flaring, and notch is close
The width of slot bottom is less than the width far from slot bottom.
For convenience of the processing for crossing oil groove, two V-shaped settings of groove sidewall of oil groove are crossed described in this programme.
To avoid stress at oil groove slot bottom from concentrating, the structural strength of cushion collar is influenced, oil groove tool is crossed described in this programme
There is the groove bottom wall being connected between two groove sidewalls of oil groove.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the working cylinder of hydraulic device in the prior art；
Fig. 2 is the A-A direction view of Fig. 1；
Fig. 3 is the structural schematic diagram of the working cylinder of hydraulic device of the invention；
Fig. 4 is the B-B direction view of Fig. 3；
Fig. 5 is the main view of cushion collar in Fig. 3；
Fig. 6 is the top view of cushion collar in Fig. 3；
Fig. 7 is the working cylinder of hydraulic device of the invention and the connection status figure of control valve.
In figure: 1- cylinder body；2- piston；3- cushion collar；4- plug；5- oil-through hole；6-Z chamber；11- cylinder body；12- piston；13-
Cushion collar；14- plug；15- oil-through hole；16- crosses oil groove；17- leads to oil groove；18- taper hole section；19-P chamber；20-T chamber；21- control
Valve；22- fuel tank；23- accumulator；111- block step；112- plunger shaft；113-Z chamber；121- buffer shaft；141- centre bore；
142- through-hole.
Specific embodiment
Embodiments of the present invention are described further with reference to the accompanying drawing.
One embodiment of the working cylinder of hydraulic device of the invention, as shown in figure 3, the working cylinder of hydraulic device includes cylinder
Body 11 and piston 12, cylinder body 11 is interior to be equipped with plunger shaft 112, and piston 12 is assemblied in plunger shaft 112 along the axially directed activity of cylinder body 11
Interior, inner wall of the plunger shaft 112 for one end corresponding with the cushion stroke end of piston 12 is equipped with block step 111, the end
End be equipped with plug 14, plug 14 is bolted with cylinder body 11.The center of plug 14 is equipped with for the slow of piston 12
Rush the centre bore 141 of the insertion of axis 121.
The working cylinder of hydraulic device further includes cushion collar 13, and cushion collar 13 is equipped with the insertion of buffer shaft 121 for piston 12
Inner hole, cushion collar 13 is movably arranged between block step 111 and plug 14 along cylinder body 11 is axial.Cushion collar 13 is equipped with edge
Axially through oil-through hole 15, also there is on plug 14 the block end that oil-through hole 15 is blocked when cooperating with 13 block of cushion collar
Face.
Cylinder body 11 is equipped with Z chamber 113, and plug 14 is equipped with through-hole 142, and the both ends of through-hole 142 are respectively and in plug 14
Heart hole 141 is connected with Z chamber 113.Block step 111 is greater than the axial ruler of cushion collar 13 at a distance from the block end face of plug 14
It is very little, so that cushion collar 13 can be moved axially along cylinder body 11.
As shown in Figure 5 and Figure 6, the end face of the one end of cushion collar 13 far from plug 14 is equipped with logical oil groove 17, leads to oil groove 17
For the straight shape groove radially extended, lead to the inner hole wall of one end perforation cushion collar 13 of oil groove 17 and the inner hole phase with cushion collar 13
Connection, the radial outer end of logical oil groove 17 are connected with oil groove 16 is crossed.It is circumferential uniformly distributed along cushion collar 13 that oil groove 16 is crossed in the present embodiment
There are four, lead to oil groove 17 also along cushion collar 13 it is circumferential it is uniformly distributed there are four.
As shown in Figures 4 to 6, the lateral wall of cushion collar 13 was equipped with oil groove 16, and crossed oil groove 16 in cushion collar 13
Both ends of the surface form opening, cross oil groove 16 and are connected far from the open at one end and plunger shaft 112 of plug 14, another end opening is buffering
It is blocked when set 13 cooperates with 14 block of plug by the block end face of plug 14.
The notch that oil groove 16 is crossed in the present embodiment is flaring, specifically, crossing oil groove 16 includes two groove sidewalls and connection two
The groove bottom wall of groove sidewall, two V-shaped settings of groove sidewall were less than the notch of oil groove 16 far from slot bottom close to the width of slot bottom
Width.The radial outer end of logical oil groove 17 was arranged in the groove bottom wall of oil groove 16, and led to the width of oil groove 17 and cross oil groove 16
Groove bottom wall width it is equal.
As shown in figure 3, centre bore 141 has taper hole section 18, taper hole section 18 is along the direction hole of plug 14 to block step 111
Diameter gradually increases, i.e., taper hole section 18 is gradually increased along bottom hole to the aperture direction size of centre bore 141, and taper hole section 18 forms center
The raised-diameter segment in hole 141, opening of the centre bore 141 close to one end of piston 12 are formed by taper hole section 18, and taper hole section 18 is opened
Internal diameter at mouthful is greater than aperture of the inner hole close to one end of plug 14 of cushion collar 13.
As shown in fig. 7, the working cylinder of above-mentioned hydraulic device is applied on hydraulic actuating mechanism, the control of hydraulic actuating mechanism
Valve 21 is used to control the working cylinder movement of hydraulic device, and accumulator 23 is connected to by P chamber 19 with plunger shaft 112.Above-mentioned Z chamber 113
The control oil pocket being connected in the control valve 21 of hydraulic actuating mechanism with control port, specifically, controlling Z chamber by control valve 21
113 with P chamber 19, T chamber 20 connection situation come control hydraulic device working cylinder act.It is two that plunger shaft 112 is divided to by piston 12
Part, respectively first part and second part, first part are arranged close to the closing position of piston 12, and second part is close to living
The open position setting of plug 12, P chamber 19 are connected to the first part of plunger shaft 112 always.It is arranged in the present embodiment at second
Cushion collar in point is cushion collar 13 of the invention, for improving starting speed when hydraulic actuating mechanism closes a floodgate, first part
Interior buffering nested structure is identical as buffering nested structure in the prior art；In other embodiments, first part and second part
Interior cushion collar is all made of cushion collar 13 of the invention, and the buffering nested structure being arranged in first part certainly is needed according to hydraulic
The specific structure of the working cylinder of device makees adaptability design.
Specifically, Z chamber 113 is connected to by control valve 21 with T chamber 20, and is connected with fuel tank 22, Z chamber when open position
It is low pressure oil in 113, closing operation can be carried out.After control valve 21 is connected to combined floodgate order, the spool of control valve 21 is converted, P chamber
19 oil liquid enter the Z chamber 113 of 11 lower part of cylinder body by control valve 21, and Z chamber 113 is connected to P chamber 19 at this time, and Z chamber 113 becomes high pressure
Oil pushes piston 12 and cushion collar 13 to move upwards, realizes the conjunction of hydraulic actuating mechanism using the upper and lower difference in areas of piston 12
Lock operation.
Closing operation process, after the stroke of the mobile L2 of cushion collar 13, when piston 12 not yet terminates the stroke of L1, cushion collar
The inner hole of logical oil groove 17 and cushion collar 13 on 13 is in connected state, and the oil liquid in Z chamber 113 can pass through the inner hole of cushion collar 13
Into logical oil groove 17, oil liquid increases flow area and oil liquid when combined floodgate to the active area of piston 12 when increasing starting
Active area increases startup power when combined floodgate；In addition, oil liquid can from the oil-through hole 15 of cushion collar 13, cross oil groove 16 and
Gap between 13 inner hole of piston 12 and cushion collar enters plunger shaft 112, and compared with prior art, the design for crossing oil groove 16 increases
To the fuel delivery of plunger shaft 112, it is also beneficial to increase startup power when closing a floodgate；The enlarged-diameter of the centre bore 141 of plug 14
Section increases initial oil liquid to the active area of cushion collar 13, is also beneficial to increase startup power when closing a floodgate.These measures increase
Flow area and the oil effect area when closing a floodgate, increase startup power when combined floodgate, solve the work of hydraulic actuating mechanism
The creeping phenomenon for making cylinder improves the reliability and stability of hydraulic actuating mechanism work.
When hydraulic actuating mechanism is in closing position, Z chamber 113 is connected to by control valve 21 with P chamber 19, is high pressure oil, can
To carry out sub-switching operation.After control valve 21 is connected to separating brake order, the spool of control valve 21 is converted, and Z chamber 113 passes through 21 He of control valve
T chamber 20 is connected to, and leads to fuel tank 22, and Z chamber 113 becomes low pressure oil at this time, and piston moves downward under the promotion of top high pressure oil, real
The sub-switching operation of existing hydraulic actuating mechanism.
In separating brake latter stage, the inner hole of the buffer shaft insertion cushion collar 13 of piston 12, oil liquid pushes piston 12 and cushion collar 13
To close to the movement of the direction of plug 14, cushion collar 13 crosses oil groove 16, oil-through hole by the block end face block of plug 14 at this time later
15 are blocked by the block end face of plug 14, and oil liquid is only capable of the outflow of the gap between piston 12 and the inner hole of cushion collar 13, from
And oil liquid resistance is increased, make the reduction of 12 movement speed of piston, buffer function is played to piston 12.
Logical oil groove in above-described embodiment along cushion collar the straight shape groove radially extended, certainly, in other embodiments
The extending direction of logical oil groove and the radial direction of cushion collar can have certain angle；Logical oil groove can also be fold-line-shaped or arc, at this time
One end of logical oil groove runs through the inner hole hole wall of cushion collar and is connected with the inner hole of cushion collar；In other embodiments, lead to oil groove
It can also be the annular groove of the circumferentially extending along cushion collar, while connected ring is set on end face of the cushion collar far from one end of plug
The communicating passage of the inner hole of shape slot and cushion collar.
Logical oil groove in above-described embodiment in other embodiments, leads to the number of oil groove there are four being circumferentially evenly distributed with along cushion collar
Amount can be set as needed, to guarantee that structural strength and the working cylinder of hydraulic device of cushion collar open function speed, it is preferred that logical
The quantity of oil groove is three, five or six.
Four logical oil grooves in above-described embodiment are uniformly distributed along the circumferential direction of cushion collar, in other embodiments, four logical oil grooves
It can also be arranged along a certain diameter symmetry of cushion collar, i.e., using a certain diameter of cushion collar as the axis of symmetry, four logical oil grooves pair
Claim the two sides that the axis of symmetry is set, and is not equal in the distance between not ipsilateral adjacent two logical oil groove of the axis of symmetry and is in
Ipsilateral the distance between the adjacent two logical oil groove of the axis of symmetry；Certainly, the distance between adjacent two logical oil groove in four logical oil grooves
It is identical or different for can also being set as needed.
Cushion collar described in above-described embodiment along the axial cylinder activity setting, cushion collar be equipped with along axially through it is excessively oily
Hole, oil-through hole are blocked when activity is to the cooperation of the block end face block of plug along the axial cylinder for cushion collar by block end face.?
In other embodiments, the axial ends of cushion collar can also cooperate with block step and plug block respectively, and cushion collar cannot at this time
It is movable along the axial cylinder, oil-through hole can be not provided on cushion collar at this time, oil liquid only passes through between the inner hole of cushion collar and piston
The into and out plunger shaft in gap；Alternatively, the oil-through hole axially extended is arranged on cushion collar, oil-through hole it is open at one end with
Plunger shaft is connected, while setting is connected to the intercommunicating pore of the inner hole of oil-through hole and cushion collar, the inner hole of cushion collar on cushion collar
In oil liquid can enter plunger shaft through intercommunicating pore, oil-through hole；Alternatively, oil-through hole, which is set as current buffer, covers axially inclined certain angle
One end of the inclined hole of degree, inclined hole is connected through the inner hole hole wall of cushion collar with the inner hole of cushion collar, and the other end runs through cushion collar
End face far from plug, certain inclined hole can also be replaced by broken line hole or arcuate socket, need to only guarantee one end of oil-through hole through buffering
The inner hole hole wall of set, the other end run through end face of the cushion collar far from plug.
In above-described embodiment, oil-through hole is staggeredly arranged in the circumferential with logical oil groove, to increase initial the oil effect area；?
In other embodiments, all or part of oil-through hole can be designed as being connected with logical oil groove.
In above-described embodiment, the lateral wall of cushion collar was equipped with oil groove, and logical oil groove is connected with oil groove is crossed；In other realities
It applies in example, oil groove can be not provided on the lateral wall of cushion collar；In other embodiments, the radial outer end for leading to oil groove can be apart from mistake
The groove bottom wall set distance of oil groove is led to oil groove at this time and is not connected to oil groove is crossed.
The notch that oil groove is crossed in above-described embodiment is flaring, and notch is less than the width far from slot bottom close to the width of slot bottom.
In other embodiments, the notch for crossing oil groove can be the consistent rectangular opening of opening size；The notch for crossing oil groove can also be for close to slot
The width at bottom is greater than the necking of the width far from slot bottom；Cross oil groove notch can also for semicircle mouth or 3/4ths circular ports or
A quarter circle mouth.
Two V-shaped settings of groove sidewall of oil groove are crossed in above-described embodiment.Two side channels of oil groove are crossed in other embodiments
Wall can also be arc, and two sides cell wall gradually increases at the center of cushion collar to peripheral direction distance.
Oil groove of crossing in above-described embodiment has the groove bottom wall being connected between two groove sidewalls of oil groove.In other implementations
The two sides cell wall that example summarized oil groove can also be directly connected to, and cross oil groove at this time and do not have groove bottom wall.
The specific embodiment of cushion collar of the invention, the working cylinder of cushion collar and above-mentioned hydraulic device in the present embodiment
The structure of cushion collar described in specific embodiment is identical, repeats no more.
Claims (10)
1. cushion collar which is provided with for being arranged between the block step and plug of the working cylinder of hydraulic device for piston
The inner hole of buffer shaft insertion；
It is characterized in that the end face that cushion collar is remotely located from one end of plug is equipped with logical oil groove, the logical oil groove and cushion collar
Inner hole is connected.
2. cushion collar according to claim 1, characterized in that the logical oil groove is circumferentially with two or more along cushion collar.
3. cushion collar according to claim 2, characterized in that each logical oil groove is circumferentially uniformly distributed along cushion collar.
4. cushion collar according to claim 1-3, characterized in that the cushion collar is for movable along the axial cylinder
Setting, be additionally provided on cushion collar along axially through oil-through hole, the oil-through hole is blocked in cushion collar and the cooperation of plug block
The block end face of head blocks.
5. cushion collar according to claim 4, characterized in that the oil-through hole is staggered in cushion collar circumferential direction with oil groove is crossed
Arrangement.
6. cushion collar according to claim 1-3, characterized in that the cushion collar is for movable along the axial cylinder
Setting, the lateral wall of cushion collar were equipped with oil groove, crossed oil groove and formed opening in the both ends of the surface of cushion collar, cross one end of oil groove
Opening for being connected with plunger shaft, another end opening for crossing oil groove is used for when cushion collar and plug block cooperate by plug
Block end face block, the logical oil groove with mistake oil groove be connected.
7. cushion collar according to claim 6, characterized in that the notch for crossing oil groove is flaring, and notch is close to slot bottom
Width be less than far from slot bottom width.
8. cushion collar according to claim 7, characterized in that two V-shaped settings of groove sidewall for crossing oil groove.
9. cushion collar according to claim 6, characterized in that the oil groove excessively, which has, was connected to two groove sidewalls of oil groove
Between groove bottom wall.
10. the working cylinder of hydraulic device, including cylinder body and piston；
Plunger shaft is equipped in cylinder body, guiding activity is assemblied in plunger shaft piston along the axial cylinder, and plunger shaft is used for and piston
The inner wall of the corresponding one end in cushion stroke end is equipped with block step, and the end at the end is equipped with plug；
Plug which is provided with the centre bore for the buffer shaft insertion on piston；
The working cylinder of hydraulic device further includes cushion collar, characterized in that the cushion collar is that claim 1-9 is described in any item
Cushion collar.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910345136.9A CN110159615B (en) | 2019-04-26 | 2019-04-26 | Buffer sleeve and working cylinder of hydraulic device using same |
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|---|---|---|---|
| CN201910345136.9A CN110159615B (en) | 2019-04-26 | 2019-04-26 | Buffer sleeve and working cylinder of hydraulic device using same |
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| CN110159615A true CN110159615A (en) | 2019-08-23 |
| CN110159615B CN110159615B (en) | 2021-03-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412885A (en) * | 2022-01-20 | 2022-04-29 | 中山大学·深圳 | Method and device for improving mechanical flexibility of hydraulic valve cylinder control system |
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| CN114412885A (en) * | 2022-01-20 | 2022-04-29 | 中山大学·深圳 | Method and device for improving mechanical flexibility of hydraulic valve cylinder control system |
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| CN110159615B (en) | 2021-03-09 |
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