A kind of hydraulic cylinder
Technical field
The present invention relates to a kind of hydraulic cylinders.
Background technology
Hydraulic cylinder, which in use, after the completion of single action is typically required, to stay for some time, such as without bar
Chamber oil inlet, piston motion and after driving piston rod fully extended, in order to ensure the lasting powerful support to the object on piston rod,
It would generally continue pressurize to rodless cavity, it is motionless to allow piston rod to stop to apply lasting hydraulic coupling to piston, in this way, living
Stopper rod could be under stressing conditions in not retraction cylinder body.But also suffer from certain drawbacks in this way, i.e., due to needing rodless cavity to hold
Continuation of insurance pressure, to increasing energy consumption to a certain extent, in addition, needed under certain operating modes to rodless cavity long lasting for
Pressurize, and this prolonged persistently pressurize can bring certain damage to entire hydraulic system.Thus piston rod is had investigated to arrive
It can be locked using locking mechanism after up to designated position, hydraulic system avoided to be in high pressure conditions for a long time, but it is existing
Can realize that the hydraulic cylinder of this function is typically only capable to be locked in a position, it is poor for applicability.
Invention content
To solve the above-mentioned problems, the present invention provides a kind of hydraulic cylinder, and solving piston rod and not needing pressure can also keep
The precalculated position of positioning only there are one defect, piston is easy to loosen, problem inconvenient to use, poor for applicability.
In order to solve the above technical problems, the present invention provides the following technical solutions:
A kind of hydraulic cylinder, including cylinder body, the cylinder body is interior to be equipped with piston, and piston rod, the work are connected on the piston
The periphery of stopper rod is equipped with the locking piece of several annular spreads, and the casing wall of the cylinder body is equipped with and the locking piece number phase
With several columns locking device, include several locking mechanisms in each column locking device, and several locking mechanisms are along the cylinder
The axis of body is arranged in order, the locking that the locking mechanism can be by the locking realization to the locking piece to the piston rod,
The outside of the cylinder body is equipped with tee one-way valve, the first three-way connection and the second three-way connection, the outlet of the tee one-way valve
It is connected to the inlet of the two-position three-way valve of each locking mechanism, the first inlet of the tee one-way valve, the cylinder body
Rodless cavity end oil inlet and outlet is connected to by first three-way connection with the first outlet of the reversal valve of hydraulic cylinder, the threeway
Second inlet of check valve, the rod chamber end of the cylinder body oil inlet and outlet pass through second three-way connection and hydraulic cylinder
Reversal valve second outlet connection, when work, the liquid return hole of each two-position three-way valve is connected to by hose with fuel tank.
Further, the locking mechanism further includes ladder sliding block and third spring, the ladder sliding block with positioned at described
Stepped hole on the side wall of cylinder body is slidably matched, and the third spring is set on the small axis of the ladder sliding block, and described
Three springs are located between the big axial end and the step surface of the stepped hole of the ladder sliding block, the outlet of the two-position three-way valve
It is connected to the macropore of the stepped hole, sealing ring is equipped between the big axis and the macropore of the stepped hole of the ladder sliding block,
In, the stepped hole is connected to the cavity of the cylinder body, when the inlet of the two-position three-way valve, outlet conducting, high pressure liquid
Body pushes the ladder sliding block to avoid the locking piece locked to the movement of the small bore end of the stepped hole, when the two-bit triplet
When the liquid return hole of valve, outlet are connected, the ladder sliding block resets under the action of the third spring, and the locking piece can be locked
It is fixed.
Further, the locking piece includes stull, air supported head, second spring, and the stull is fixed at described
On the periphery of piston rod, and the stull is mutually perpendicular to the piston rod, and the free end of the stull is equipped with and the stull
Coaxial guide hole, the air supported head are slidably matched with the guide hole, and the second spring setting is led in the air supported head with described
Between the bottom surface in hole, the air supported head can extend into the aperture of the stepped hole locking for realizing the piston rod, wherein institute
The free end for stating stull is slidably matched with the corresponding guide groove on the inner wall of the cylinder body.
Further, the number of the locking piece is two or three or four, and annular is uniformly distributed.
Further, the piston includes preceding partial piston, rear partial piston and taper sheath, the preceding partial piston, cone
Shape set, rear partial piston are sequentially sleeved on the end axis of the piston rod, the taper sheath by several annular spreads wedge shape
Item forms, and the wedge-shaped bar is connect with the end face of the preceding partial piston, and the wedge-shaped bar can be moved along the radial direction of the piston
It is dynamic, it is described after partial piston conical bolt hole be threadedly coupled with the male cone (strobilus masculinus) of the taper sheath after the wedge-shaped bar be pushed into be located at
In corresponding limiting slot on the peripheral surface of the end axis.
Further, the end face of the preceding partial piston is equipped with T-slot, is located on the large end face of the wedge-shaped bar
T-shaped block is slidably matched with the T-slot.
Further, the piston further includes the first spring, first spring setting the taper sheath with it is described
Between the bottom surface of conical bolt hole.
Further, the outer end face of the rear partial piston is equipped with six holes in one, interior six holes and the piston
Coaxial arrangement.
Further, the number of the wedge-shaped bar is three or four.
Further, further include gasket, the gasket is arranged in the preceding partial piston and the piston rod
Between the shaft shoulder.
It can be seen from above-mentioned technical proposal the invention has the advantages that:
Due to being equipped with multiple locking mechanisms, thus piston rod can be protected in the case of rodless cavity no pressure in multiple positions
Lock-out state is held, easy to use, applicability is more preferable;
It is embedded in due to wedge-shaped bar in the limiting slot of piston rod, while the setting of the first spring avoids rear partial piston and taper
Set loosens, thus piston connection is reliable, it is not easy to the case where loosening.
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the structural schematic diagram of the piston of the present invention.
Fig. 3 is the connection diagram of the preceding partial piston and taper sheath of the present invention.
Fig. 4 is the structural schematic diagram of the locking mechanism of the present invention.
Reference sign:Cylinder body 1, guide groove 11, stepped hole 12, piston 2, preceding partial piston 21, T-slot 211, rear part
Piston 22, conical bolt hole 221, interior six hole 222, taper sheath 23, wedge-shaped bar 231, T-shaped block 232, the first spring 24, piston rod 3,
Hold axis 31, limiting slot 32, locking piece 4, stull 41, guide hole 411, air supported head 42, second spring 43, locking mechanism 5, ladder sliding block
51, third spring 52, sealing ring 53, two-position three-way valve 54, tee one-way valve 6, the first three-way connection 7, the second three-way connection 8,
Gasket 9.
Specific implementation mode
The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be defined by the claims
Implement with the multitude of different ways of covering.
The application is described further below with reference to Fig. 1 to Fig. 4, a kind of hydraulic cylinder as shown in Figure 1 and Figure 4, including
Cylinder body 1, the cylinder body 1 is interior to be equipped with piston 2, piston rod 3 is connected on the piston 2, if the periphery of the piston rod 3 is equipped with
The locking piece 4 of dry annular spread, the casing wall of the cylinder body 1 is equipped with to be locked with 4 the same number of several columns of the locking piece
Device, includes several locking mechanisms 5 in each column locking device, and several locking mechanisms 5 along the cylinder body 1 axis successively
Arrangement, the locking mechanism 5 can be realized multiple pre- by realizing the locking to the piston rod 3 to the locking of the locking piece 4
The use set is positioned, easy to use, the outside of the cylinder body 1 is equipped with tee one-way valve 6, the first three-way connection 7 and the second threeway
The outlet of connector 8, the tee one-way valve 6 is connected to the inlet of the two-position three-way valve 54 of each locking mechanism 5, the threeway
The setting of check valve 6 can ensure that the rodless cavity of the hydraulic cylinder or rod chamber are in the two-position three-way valve 54 when high pressure conditions
Inlet is all in high pressure conditions, the first inlet of the tee one-way valve 6, the rodless cavity end oil inlet and outlet of the cylinder body 1
Be connected to the first outlet of the reversal valve of hydraulic cylinder by first three-way connection 7, the tee one-way valve 6 second into
The oil inlet and outlet at the rod chamber end of liquid mouth, the cylinder body 1 passes through the of the reversal valve of second three-way connection 8 and hydraulic cylinder
Two outlets, when work, the liquid return hole of each two-position three-way valve 54 is connected to by hose with fuel tank.
As shown in Figures 2 and 3, the piston 2 includes preceding partial piston 21, rear partial piston 22, taper sheath 23 and first
Spring 24, the preceding partial piston 21, taper sheath 23, rear partial piston 22 are sequentially sleeved on the end axis 31 of the piston rod 3,
The taper sheath 23 is made of the wedge-shaped bar 231 of several annular spreads, the wedge-shaped bar 231 and the preceding partial piston 21
End face connects, and the wedge-shaped bar 231 can moving radially along the piston 2, it is described after partial piston 22 conical bolt hole 221
After being threadedly coupled with the male cone (strobilus masculinus) of the taper sheath 23 by the push-in of the wedge-shaped bar 231 on the peripheral surface of the end axis 31
In corresponding limiting slot 32, first spring 24 is arranged between the taper sheath 23 and the bottom surface of the conical bolt hole 221.
The setting of first spring 24 is loosened in order to avoid the rear partial piston 22 with the taper sheath 23, and then avoids the wedge
Shape item 231 is detached from the limiting slot 32, and then the piston 2 is avoided to loosen, and the piston 2 is connect with the piston rod 3 can
It leans on, wherein the outer end face of partial piston 22 is equipped with six holes 222 in one after described, and interior six holes 222 and the piston 2 are same
Axis is arranged, and the setting in interior six holes 222 facilitates the installation of the rear partial piston 22.
The end face of the preceding partial piston 21 is equipped with T-slot 211, the T shapes being located on the large end face of the wedge-shaped bar 231
Block 232 is slidably matched with the T-slot 211.
Preferably, the number of the wedge-shaped bar 231 is three or four.
As shown in Figure 1 and Figure 4, the locking mechanism 5 further includes ladder sliding block 51 and third spring 52, the ladder sliding block
51 are slidably matched with the stepped hole 12 on the side wall of the cylinder body 1, and the third spring 52 is set in the ladder sliding block
On 51 small axis, and the third spring 52 is located at the step surface of the big axial end and the stepped hole 12 of the ladder sliding block 51
Between, the outlet of the two-position three-way valve 54 is connected to the macropore of the stepped hole 12, the big axis of the ladder sliding block 51 and institute
It states and is equipped with sealing ring 53 between the macropore of stepped hole 12, wherein the stepped hole 12 is connected to the cavity of the cylinder body 1, works as institute
When stating inlet, the outlet conducting of two-position three-way valve 54, highly pressurised liquid pushes the ladder sliding block 51 to the stepped hole 12
Small bore end movement avoids the locking piece 4 locked, when the liquid return hole of the two-position three-way valve 54, outlet conducting, the rank
Terraced sliding block 51 resets under the action of third spring 52, and the locking piece 4 can be locked.
The locking piece 4 includes stull 41, air supported head 42, second spring 43, and the stull 41 is fixed at the work
On the periphery of stopper rod 3, and the stull 41 is mutually perpendicular to the piston rod 3, the free end of the stull 41 be equipped with it is described
The coaxial guide hole 411 of stull 41, the air supported head 42 are slidably matched with the guide hole 411, and the second spring 43 is arranged in institute
It states between air supported head 42 and the bottom surface of the guide hole 411, the air supported head 42 can extend into the aperture of the stepped hole 12 real
The locking of the existing piston rod 3, wherein the free end of the stull 41 is corresponding on the inner wall of the cylinder body 1 to lead
Slot 11 is slidably matched.
Preferably, the number of the locking piece 4 is two or three or four, and annular is uniformly distributed.
Hydraulic cylinder further includes gasket 9, and the gasket 9 is arranged in the preceding partial piston 21 and the piston rod 3
Between the shaft shoulder, hydraulic cylinder pressure relief is avoided.
It is high to the rodless cavity filling liquid of hydraulic cylinder, at the inlet of the two-position three-way valve 54 of the locking mechanism 5 when work
Pressure condition, and the inlet of all two-position three-way valves 54, outlet conducting, the ladder sliding block 51 is to the small of the stepped hole 12
Nose end movement avoids the air supported head 42 from entering in the aperture of the stepped hole 12, when the piston rod 3 will be at scheduled
When one precalculated position is held in position state, the action of the two-position three-way valve 54 of corresponding locking mechanism 5 make liquid return hole, outlet be connected into
Row pressure release, the ladder sliding block 51 reset under the action of third spring 52, and the air supported head 42 can extend into corresponding
The locking that the piston rod 3 is realized in the aperture of stepped hole 12, after the completion of work, to the rod chamber filling liquid of hydraulic cylinder, the lock
Determine to be high pressure conditions at the inlet of the two-position three-way valve 54 of mechanism 5, the action of two-position three-way valve 54 of corresponding position makes feed liquor
Mouth, outlet conducting, the ladder sliding block 51 push the air supported head 42 to shrink, and the piston rod 3 can re-move, the course of work
Fast response time, and it is easy to operate, it is easy to use.
It these are only the preferred embodiment of the present invention, be not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.Any modification made by all within the spirits and principles of the present invention,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.