CN208264340U - A kind of power cylinder assembly - Google Patents
A kind of power cylinder assembly Download PDFInfo
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- CN208264340U CN208264340U CN201820603946.0U CN201820603946U CN208264340U CN 208264340 U CN208264340 U CN 208264340U CN 201820603946 U CN201820603946 U CN 201820603946U CN 208264340 U CN208264340 U CN 208264340U
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- cylinder
- cylinder barrel
- retaining ring
- barrel
- cap
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Abstract
The present utility model application belongs to truck power steering apparatus technical field, a kind of power cylinder assembly is specifically disclosed, including cylinder head, cylinder barrel, piston, cylinder cap and piston rod, cylinder head are fixedly connected with cylinder barrel, cylinder head be equipped with it is left into oil out port and, cylinder barrel is equipped with right oil inlet and outlet；Piston is fixedly connected with piston rod, and piston seal is simultaneously slidably connected in cylinder barrel, and cylinder cap is fixedly connected on the front end of cylinder barrel, rectangular retaining ring and two sealing O circles is equipped between cylinder barrel and cylinder cap, cylinder cap front end is equipped with external dust slinger.The utility model provides a kind of good power cylinder assembly of sealing and dustproof effect.
Description
Technical field
The utility model belongs to truck power steering apparatus technical field, and it is total to specifically disclose a kind of power cylinder
At.
Background technique
Power cylinder is used on automobile, can be greatly reduced motor turning hand-power, be mitigated the labor intensity of driver, mention
High vehicle mobility and the sensitivity of driving.According to the difference of flow regime in system, can be divided into constant pressure hydraulic power-assisted and
Constant flow hydraulic power-assisted.The characteristics of constant pressure hydraulic force aid system be no matter steering wheel be in center position or steering position,
Steering wheel remain stationary or is rotating, and the oil liquid in system pipeline is always to maintain high pressure conditions；And constant flow hydraulic steering helps
Although the steering pump of Force system works always, when hydraulic booster system does not work, oil pump is in idling conditions, and pipeline is born
Lotus is smaller than gerotor type, and present most of hydraulic steering power-assisted systems all use normal streaming.Which kind of but no matter turned to using dynamic
Power cylinder requires to keep its high leakproofness.
Using power cylinder assembly in the prior art, it may appear that following problems: 1) sealing between cylinder cap and cylinder barrel
Sealing ring is enclosed using single O, due to being inevitably present installation gap between cylinder cap and cylinder barrel, in the power cylinder course of work
In, O encloses sealing ring under oil pressure or gas pressure, it is easy to which into the gap between cylinder cap and cylinder barrel, gap is bigger, O circle
The part that sealing ring is squeezed into is more, and the shearing of receiving is bigger, is also just easily torn and occurs slight crack；In addition, in length
In the case where phase use, the case where it is easy to appear oil leaks between cylinder barrel and cylinder cap, not only influences the normal work of power cylinder
Make, and the appearance of power cylinder assembly can be seriously affected；2) combined seal ring is only equipped at cylinder cap and plunger rod contacts
Dust-proof, dust-proof effect is poor.
Utility model content
The purpose of this utility model is providing a kind of power cylinder assembly, to solve power cylinder in the prior art
The problem of sealing and dustproof effect difference.
In order to achieve the above object, the base case of the utility model are as follows: a kind of power cylinder assembly, including cylinder head,
Cylinder barrel, piston, cylinder cap and piston rod, the cylinder head are fixedly connected with cylinder barrel, and cylinder head is equipped with left into oil out port, the cylinder barrel
Right oil inlet and outlet is equipped with close to the side of cylinder cap；The piston is fixedly connected with piston rod, and the piston seal is simultaneously slidably connected
In cylinder barrel, the cylinder cap is fixedly connected on the front end of the cylinder barrel, set between the cylinder barrel and cylinder cap there are two sealing O circle and
The rectangular retaining ring being interference fitted with cylinder barrel, cylinder cap, the cylinder cap front end are equipped with external dust slinger.
The so-called cylinder cap front end of the utility model is piston rod from one end that cylinder cap stretches out.
The working principle of this base case is with beneficial effect: since cylinder head is fixedly connected with cylinder barrel, cylinder head is equipped with
Into oil out port, cylinder barrel is equipped with right oil inlet and outlet close to the side of cylinder cap on a left side, and it is close that entire cylinder barrel by piston is divided into left and right two
Chamber is sealed, when leading to hydraulic oil into oil out port to a left side for cylinder head, hydraulic oil pushes piston, and piston driving piston rod is from cylinder cap
Front end is stretched out；Similarly, when to the right oil inlet and outlet of cylinder barrel lead to hydraulic oil when, hydraulic oil push piston, piston driving piston rod from
The bottom of cylinder barrel is mobile, by leading to hydraulic oil into the right oil inlet and outlet of oil out port and cylinder barrel to the left of cylinder head, realizes that steering is dynamic
The reciprocating motion of power cylinder；This power cylinder assembly is using double O circle sealings, to two layers of sealing is carried out between cylinder barrel and cylinder cap, greatly
The sealing effect between cylinder barrel and cylinder cap is enhanced greatly；Rectangular retaining ring is equipped between cylinder barrel and cylinder cap, due to cylinder barrel and cylinder cap it
Between inevitably there is installation gap, rectangular retaining ring and cylinder barrel, cylinder cap are interference fitted, can eliminate between cylinder barrel and cylinder cap
Gap is installed；In power cylinder assembly reciprocatory movement, since the elasticity of sealing O circle is larger, it is easy to enter cylinder barrel
In installation gap between cylinder cap, rectangular retaining ring and cylinder barrel, cylinder cap are interference fitted, and eliminate the clipping room between cylinder barrel and cylinder cap
Gap prevents sealing O circle from entering the installation gap between cylinder barrel and cylinder cap and is damaged, and plays the role of protection sealing O circle；Due to
Cylinder cap front end is equipped with external dust slinger, can first obstruct dust outside cylinder cap, and before external dust slinger and cylinder cap
End is interference fit, plays the role of supporting piston rod.In addition, disassembly is simple since external dust slinger is set to cylinder cap front end,
It is conveniently replaceable, simple installation.
Further, rectangular retaining ring is adjacent with sealing O circle, and rectangular retaining ring is set between two sealing O circles, intermediate side
Shape retaining ring and cylinder cap using being interference fitted, can high degree protection sealing O circle it is without damage.
Further, there is cut, the rectangular retaining ring of cut has certain tension, can be according to turning on the rectangular retaining ring
Certain diastole and contraction are carried out to the cylinder diameter gap size of power cylinder assembly, are more conducive to rectangular retaining ring and cylinder barrel, cylinder cap
Interference fit.
Further, the longitudinal section of the rectangular retaining ring is rectangular, and rectangular retaining ring is effectively ensured and matches with cylinder barrel, cylinder cap interference
It closes.
Further, the rectangular retaining ring includes the elastic rubber layer of internal layer and the nylon layer that is coated on outside elastic rubber layer,
The elasticity of nylon layer is smaller, and decrement is smaller, and hardness is larger, can guarantee that rectangular retaining ring and cylinder barrel, cylinder cap are interference fitted, internal layer
Elastic rubber layer can increase rectangular retaining ring elasticity, increase the tension in the radially direction of rectangular retaining ring.
Further, the external dust slinger is iron-carbon alloy retaining ring, and the inner surface of the external dust slinger is equipped with bullet
Property rubber seal.Both the tight fit of external dust slinger inner surface and piston rod, effective dust ensure that, and can have been guaranteed
Supporting role of the external dust slinger to piston rod.
Detailed description of the invention
Fig. 1 is a kind of diagrammatic cross-section of power cylinder assembly embodiment of the utility model；
Fig. 2 is a kind of structural schematic diagram of the rectangular retaining ring of power cylinder assembly embodiment of the utility model；
Fig. 3 is a kind of Longitudinal cross section schematic of the rectangular retaining ring of power cylinder assembly embodiment of the utility model.
Specific embodiment
The utility model is described in further detail below by specific embodiment:
Appended drawing reference in Figure of description includes: that cylinder head 1, cylinder barrel 2, piston 3, cylinder cap 4, piston rod 5, left disengaging oil connect
Mouth 6, right oil inlet and outlet 7, sealing O enclose 8, rectangular retaining ring 9, external dust slinger 10, cut 11, nylon layer 12, elastic rubber layer
13。
As shown in Figure 1, a kind of power cylinder assembly, including cylinder head 1, cylinder barrel 2, piston 3, cylinder cap 4 and piston rod 5, cylinder
First 1 welds with cylinder barrel 2, is conducive to improve sealing intensity；Cylinder head be equipped with a left side into oil out port 6, cylinder barrel 2 close to cylinder cap 4 one
Side is equipped with right oil inlet and outlet 7, and piston 3 is bolted with piston rod 5, and piston 3 is sealed and is slidably connected in cylinder barrel 2, cylinder
Lid 4 is fixedly connected on the front end of cylinder barrel 2, is set between cylinder barrel 2 and cylinder cap 4 there are two sealing O circle and is matched with cylinder barrel 2,4 interference of cylinder cap
The rectangular retaining ring 9 closed, 4 front end of cylinder cap are equipped with external dust slinger 10.
As shown in Fig. 2, the elastic rubber layer 13 of rectangular retaining ring 9 including internal layer and the nylon being coated on outside elastic rubber layer 13
The elasticity of layer 12, nylon layer 12 is smaller, and decrement is smaller, and hardness is larger, can guarantee rectangular retaining ring 9 and cylinder barrel 2,4 mistake of cylinder cap
It is full of cooperation, the elastic rubber layer 13 of internal layer can increase rectangular 9 elasticity of retaining ring, increase the radially direction of rectangular retaining ring 9
Tension；In addition, rectangular retaining ring 9 is adjacent with sealing O circle, and rectangular retaining ring 9 is set between two sealing O circles；It is rectangular in order to make
Retaining ring 9 has certain tension, and certain diastole and receipts can be carried out according to the cylinder diameter gap size of power cylinder assembly
It contracts, there is cut 11 on rectangular retaining ring 9；As shown in figure 3, matching in order to which rectangular retaining ring 9 is effectively ensured with cylinder barrel 2,4 interference of cylinder cap
It closes, the longitudinal section of rectangular retaining ring 9 is rectangular.
External dust slinger 10 is iron-carbon alloy retaining ring, and the inner surface of external dust slinger 10 is sealed equipped with elastic rubber
Circle, both ensure that the tight fit of external dust slinger 10 inner surface and piston rod 5, effective dust, and can guarantee external anti-
Supporting role of the dirt retaining ring 10 to piston rod 5.
When to cylinder head 1 a left side lead to hydraulic oil into oil out port 6 when, hydraulic oil push piston 3, piston 3 drive piston rod 5 from
The front end of cylinder cap 4 is stretched out；When leading to hydraulic oil to the right oil inlet and outlet 7 of cylinder barrel 2, hydraulic oil pushes piston 3, and piston 3, which drives, lives
Stopper rod 5 is mobile from the bottom of cylinder barrel 2, hydraulic by leading to the left right oil inlet and outlet 7 into oil out port 6 and cylinder barrel 2 of cylinder head 1
Oil realizes the reciprocating motion of power cylinder；This power cylinder assembly is using double O circle sealings, between cylinder barrel 2 and cylinder cap 4
Two layers of sealing is carried out, the sealing effect between cylinder barrel 2 and cylinder cap 4 is greatly strengthened；Rectangular gear is equipped between cylinder barrel 2 and cylinder cap 4
Circle 9, due to inevitably there is installation gap between cylinder barrel 2 and cylinder cap 4, rectangular retaining ring 9 is matched with cylinder barrel 2,4 interference of cylinder cap
It closes, the installation gap between cylinder barrel 2 and cylinder cap 4 can be eliminated；In power cylinder assembly reciprocatory movement, due to sealing
The elasticity of O circle is larger, it is easy into the installation gap between cylinder barrel 2 and cylinder cap 4, rectangular retaining ring 9 and cylinder barrel 2,4 mistake of cylinder cap
It is full of cooperation, eliminates the installation gap between cylinder barrel 2 and cylinder cap 4, prevents sealing O circle from entering the clipping room between cylinder barrel 2 and cylinder cap 4
Gap is damaged, and plays the role of protection sealing O circle；It, can first will be grey since 4 front end of cylinder cap is equipped with external dust slinger 10
Dirt obstructs outside cylinder cap 4, and external dust slinger 10 and 4 front end of cylinder cap are interference fit, play the work of support piston rod 5
With.In addition, disassembly is simple since external dust slinger 10 is set to 4 front end of cylinder cap, it is conveniently replaceable, simple installation.
Above-described is only the embodiments of the present invention, and the common sense such as well known specific structure and characteristic are herein in scheme
It does not describe excessively.It should be pointed out that for those skilled in the art, in the premise for not departing from the utility model structure
Under, several modifications and improvements can also be made, these also should be considered as the protection scope of the utility model, these all will not influence
The effect and patent practicability that the utility model is implemented.
Claims (6)
- Connect 1. a kind of power cylinder assembly, including cylinder head, cylinder barrel, piston, cylinder cap and piston rod, the cylinder head and cylinder barrel are fixed It connects, the cylinder head is equipped with a left side into oil out port, and the cylinder barrel is equipped with right oil inlet and outlet close to the side of cylinder cap；The piston with Piston rod is fixedly connected, and the piston seal is simultaneously slidably connected in cylinder barrel, before the cylinder cap is fixedly connected on the cylinder barrel End, which is characterized in that the rectangular gear there are two sealing O circle and with cylinder barrel, cylinder cap interference fit is set between the cylinder barrel and cylinder cap Circle, the cylinder cap front end are equipped with external dust slinger.
- 2. a kind of power cylinder assembly as described in claim 1, which is characterized in that the rectangular retaining ring encloses phase with sealing O Neighbour, and rectangular retaining ring is set between two sealing O circles.
- 3. a kind of power cylinder assembly as described in claim 1, which is characterized in that have cut on the rectangular retaining ring.
- 4. a kind of power cylinder assembly as described in claim 1, which is characterized in that the longitudinal section of the rectangular retaining ring is side Shape.
- 5. a kind of power cylinder assembly as described in claim 1, which is characterized in that the rectangular retaining ring includes the bullet of internal layer Property the rubber layer and nylon layer that is coated on outside elastic rubber layer.
- 6. a kind of power cylinder assembly as described in claim 1, which is characterized in that the external dust slinger is the conjunction of iron carbon The inner surface of golden retaining ring, the external dust slinger is equipped with elastic rubber sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820603946.0U CN208264340U (en) | 2018-04-25 | 2018-04-25 | A kind of power cylinder assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820603946.0U CN208264340U (en) | 2018-04-25 | 2018-04-25 | A kind of power cylinder assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208264340U true CN208264340U (en) | 2018-12-21 |
Family
ID=64679169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820603946.0U Active CN208264340U (en) | 2018-04-25 | 2018-04-25 | A kind of power cylinder assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208264340U (en) |
-
2018
- 2018-04-25 CN CN201820603946.0U patent/CN208264340U/en active Active
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