CN106151351B - Hydraulic pressure unit and its shield - Google Patents
Hydraulic pressure unit and its shield Download PDFInfo
- Publication number
- CN106151351B CN106151351B CN201510130129.9A CN201510130129A CN106151351B CN 106151351 B CN106151351 B CN 106151351B CN 201510130129 A CN201510130129 A CN 201510130129A CN 106151351 B CN106151351 B CN 106151351B
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- shield
- external shell
- hydraulic pressure
- pressure unit
- sealing shroud
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Abstract
The present invention relates to a kind of hydraulic pressure unit and its shields.Hydraulic pressure unit includes: external shell；Cylinder body；Plunger；Plunger bushing；And sealing shroud, the first end of sealing shroud is fixed to plunger bushing, and the second end of sealing shroud is fixed to external shell, thus the inner cavity of sealed external shell.The external shell is made of rigid material, and the lock slots along its circumferential direction arrangement and end stop portion are provided in the peripheral surface of the external shell.And it is provided with shield on the outside of the sealing shroud, for covering at least part of the sealing shroud, the shield is made of elastic material.The shield includes: columnar ontology；Locking ring at one end of the ontology, the locking ring is prominent towards the inside of the shield from one end of the ontology, and the locking ring is for being locked in the lock slots；And end stop slot, the end stop slot is for accommodating the end stop portion.
Description
Technical field
The present invention relates to a kind of hydraulic pressure unit and its shields.
Background technique
Hydraulic tensioner is usually applied in the accessory belt drive belt system of internal combustion engine, it passes through hydraulic pressure unit and its bullet
Spring absorbs the vibration in belt transmission, to reduce the impact that each component is subject in transmission system, extends accessory belt drive belt system
The service life of system, it is ensured that the accuracy and reliability of belt transmission, and drive noise is reduced, improve the comfort of driving.
However, being provided with a sealing shroud on hydraulic pressure unit for sealing in the hydraulic tensioner of the prior art
Internal hydraulic chamber.Sealing shroud is a kind of component of sensitive for damages, is easier especially near the shoulder regions of sealing shroud
It is damaged.The collision or impact of sharp metal parts or other components are easy to damage the sealing shroud, are especially easy to
Damage the part near the shoulder regions of the sealing shroud.Worker or after-sales service personnel on the production line of some factories can
Can be not professional enough and careful, it is easy for damaging the sealing shroud.In addition, in the case where the pavement behavior in some areas is very poor,
The handstone that splashing is for example had when vehicle driving hits vehicle, and thus the sealing shroud is also highly susceptible to damage.If sealing
Set receives damage and ruptures, and the hydraulic oil in hydraulic pressure unit may will leak, this will will lead to noise, even result in hydraulic
Stretcher cannot normal hydrodynamic force, so that cisco unity malfunction, thus causes hydraulic tensioner to fail.
Summary of the invention
In view of the above-mentioned technical problem of the prior art, it is an object of the invention to develop a kind of hydraulic pressure unit and its protection
Cover can protect the sealing shroud of the hydraulic pressure unit of hydraulic tensioner impaired to prevent it, so that it is guaranteed that the normal work of hydraulic tensioner
Make.
According to the present invention, a kind of hydraulic pressure unit is provided comprising: external shell；It is fixed on the of the external shell
The cylinder body of an end portion, the cylinder body are located in the inner cavity of the external shell；Plunger, the plunger and the cylinder body cooperate,
And the plunger extends in the inner cavity of the external shell towards the second end of the external shell；It is solid with the plunger
Surely the plunger bushing connected；And sealing shroud, the first end of the sealing shroud are fixed to the plunger bushing, and the sealing shroud
The second end is fixed to the external shell, to seal the inner cavity of the external shell, wherein the external shell is by rigidity
Material is made, and is provided in the peripheral surface of the external shell and stops along the lock slots of its circumferential direction arrangement and end
Dynamic portion；And it is provided with shield on the outside of the sealing shroud, it is described anti-for covering at least part of the sealing shroud
Shield is made of elastic material, and the shield includes: columnar ontology；Locking at one end of the ontology
Ring, the locking ring is prominent towards the inside of the shield from one end of the ontology, and the locking ring is for being locked to institute
It states in lock slots；And end stop slot, the end stop slot is for accommodating the end stop portion.
Preferably, the external shell is made of aluminium alloy or cast iron.
Preferably, the end stop slot is extended through along the direction for the central longitudinal axis for being parallel to the shield
The whole length of entire shield, and the end stop slot penetrates the shield along the radial direction of the shield
Entire wall thickness.
Preferably, it is entire to extend one around the periphery of the external shell together for the lock slots and the end stop portion
Circumference.
Preferably, the sealing shroud is rubber sleeve.
According to the present invention, a kind of shield for hydraulic pressure unit as described above is additionally provided, wherein the shield
It is made of elastic material, and the shield includes: columnar ontology；Locking ring at one end of the ontology, institute
It is prominent towards the inside of the shield from one end of the ontology to state locking ring, the locking ring is described hydraulic for being locked to
In the lock slots of the external shell of unit；And end stop slot, the end stop slot is for accommodating the hydraulic pressure unit
The end stop portion of external shell.
Preferably, the end stop slot is extended through along the direction for the central longitudinal axis for being parallel to the shield
The whole length of entire shield, and the end stop slot penetrates the shield along the radial direction of the shield
Entire wall thickness.
The present invention provides a kind of hydraulic pressure units provided with shield, and wherein the setting of shield can protect hydraulic
The sealing shroud of the hydraulic pressure unit of tight device is impaired to prevent it, so as to ensure that hydraulic tensioner works normally.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described.It is readily apparent that the accompanying drawings in the following description is only particular implementation as described in this application
Example, is not the limitation to protection scope of the present invention.For those of ordinary skill in the art, creative labor is not being paid
Under the premise of dynamic, some other embodiments and attached can be obtained with these embodiments according to the present invention and its attached drawing certainly
Figure.
Fig. 1 is the cross-sectional view splitted along the central axis of the plunger of hydraulic pressure unit, and wherein shield is already installed on close
On big envelope.
Fig. 2 is other components of the shield and hydraulic pressure unit in the case where shield is also not installed on sealing shroud
Decomposition side view.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with of the invention real
The attached drawing in example is applied, technical scheme in the embodiment of the invention is clearly and completely described.Obviously, described implementation
Example is only preferred embodiment of the present application, instead of all the embodiments.Based on specific embodiment described herein, ability
Domain those of ordinary skill all other embodiment obtained without making creative work should all fall in this
Within the scope of inventive concept.
Hydraulic tensioner according to the present invention is usually placed in Belt Driving System for Engine Accessories, for providing belt
Tensile force, thus tightening belt, and then prevent belt from shaking in transmission.Hydraulic tensioner according to the present invention substantially wraps
Include: one end of hydraulic pressure unit, the hydraulic pressure unit is connected with engine body；Rotating arm, the other end of the hydraulic pressure unit and should
One end of rotating arm is connected, and the intermediate position of the rotating arm has mounting hole, and rotating arm can be around consolidating across the mounting hole
Determine component swing；And belt pulley, the belt pulley are mounted on the other end of the rotating arm, Belt Driving System for Engine Accessories
In belt be wrapped on the belt pulley.When hydraulic tensioner is mounted in Belt Driving System for Engine Accessories, hydraulic list
Member can generate power to push rotation arm swing, and rotating arm drives belt pulley, and then belt pulley can apply a power to belt, thus
Tightening belt.There are a certain amount of hydraulic oil in hydraulic pressure unit, and hydraulic pressure unit is by the hydraulic oil hydrodynamic force.
The knot of the part containing hydraulic pressure unit of hydraulic tensioner according to the present invention is specifically described with reference to Fig. 1 and Fig. 2
Structure.Fig. 1 is the cross-sectional view splitted along the central axis of the plunger of hydraulic pressure unit, and wherein shield is already installed on sealing shroud
On；And Fig. 2 is other components of the shield and hydraulic pressure unit in the case where shield is also not installed on sealing shroud
Decomposition side view.
Hydraulic pressure unit 1 according to the present invention includes external shell 20 and plunger 2, and the shape of external shell 20 is substantially in cylinder
Shape, and there is substantial cylindrical inner cavity, it can be injected in the substantial cylindrical inner cavity of external shell 20 a certain amount of
Hydraulic oil, the top upward opening of external shell 20.It is provided in the substantial cylindrical inner cavity of external shell 20 for producing
The cylinder body 3 of the general cylindrical shape of raw hydraulic damping, cylinder body 3 and plunger 2 cooperate, by the substantial cylindrical of external shell 20
Inner cavity is separated into first chamber 4 and second chamber 5, and wherein first chamber 4 is the intracavity space of cylinder body 3, and second chamber 5 is cylinder body
Space between 3 outer wall and the inner wall of external shell 20, first chamber 4 and second chamber 5 can inject hydraulic oil.In cylinder body
3 bottom is provided with the check valve 6 for preventing the adverse current of the hydraulic oil in first chamber 4, in 6 permission second chambers 5 of check valve
Hydraulic oil enters first chamber 4 from the oilhole of the lower end of cylinder body 3, without allowing hydraulic oil from 4 adverse current of first chamber to the second chamber
In room 5.The upper end of plunger 2 is fixed to plunger bushing 7, and plunger bushing 7 is in round cap shape, and the top of plunger bushing 7 is integrally formed with peace
Dress portion 8, hydraulic pressure unit 1 are installed on engine body by the mounting portion 8.The bottom of cylinder body 3 and the bottom of external shell 20
Portion is fixedly connected, and the lower end of external shell 20 is integrally formed with coupling part 9, and the hydraulic pressure unit 1 of hydraulic tensioner passes through company
Socket part point 9 is pivotably connected to the rotating arm of hydraulic tensioner, so that hydraulic pressure unit 1 can drive rotation arm swing, in turn
Driving is located at the belt pulley at the other end of the rotating arm, so as to be tensioned engine accessory belt power train in a suitable manner
Belt in system.In addition, being provided with the spring 11 for tightening belt between plunger bushing 7 and cylinder body 3.
In the case where hydraulic tensioner work, when external shell 20 moves upwards, the volume of first chamber 4 becomes smaller,
The hydraulic coupling that hydraulic oil generates increases, at this point, the hydraulic oil in first chamber 4 can only be from because check valve 6 is in close state
Fit clearance between plunger 2 and cylinder body 3 is released；Since fit clearance is smaller, hydraulic oil can generate during releasing
Biggish flowed friction carrys out cushion load.When external shell 20 moves downward, the volume of first chamber 4 increases, first chamber 4
In the hydraulic coupling of hydraulic oil reduce therewith, when the hydraulic coupling of the hydraulic oil in first chamber 4 be less than it is hydraulic in second chamber 5
Oil hydraulic coupling when, the pressure difference generated between first chamber 4 and second chamber 5 make check valve 6 open, allow hydraulic oil from
Hydraulic oil channel in the bottom of the inner cavity of external shell 20 enters first chamber 4.In the whole work process of hydraulic tensioner
In, compressed spring 11 constantly applies certain tensile force to belt always in hydraulic pressure unit 1, while to external shell 20
Play reset response.
The open upper end of external shell 20 is connected with each other with plunger bushing 7 by sealing shroud 12.In the work of hydraulic tensioner
In, necessarily there is relative displacement between mounting portion 8 and coupling part 9, the setting of resiliently flexible sealing shroud 12 can provide
This relative displacement.Preferably, the sealing shroud 12 is rubber sleeve.External shell 20 and sealing shroud 12 with plunger bushing 7 together
The inner space of a sealing is defined, the hydraulic oil of hydraulic pressure unit is injected in the inner space.Sealing shroud 12 has downside
Part 13 and upper portion 14.The generally cylindrical shape in lower portion 13, and it is fixed on the upper end of external shell 20, and in fixation
Place forms fluid-tight sealed connection.The generally cylindrical shape in upper portion 14, and be fixed on the periphery of plunger bushing 7, and
Fluid-tight sealed connection is formed with plunger bushing 7.The diameter of lower portion 13 is greater than the diameter of upper portion 14, thus downside
A transition portion 15 is formed between part 13 and upper portion 14.In practice, the shoulder segments outstanding of transition portion 15
It is easy to be damaged by directly hitting for external object.
In hydraulic pressure unit 1 according to the present invention, a shield 10 is set on the outside of sealing shroud 12.Such as Fig. 1 and
Shown in Fig. 2, the generally cylindrical shape and be an elastomeric element on the whole on the whole of shield 10, shield 10 has an end
Portion's locking groove 60 and a locking ring 40.Preferably, end stop slot 60 is along the central longitudinal axis for being parallel to shield 10
Direction extend, and end stop slot 60 extends through entire shield 10, and end stop along the up and down direction in Fig. 2
Slot 60 penetrates the entire wall thickness of shield 10 along the radial direction of shield 10, so that the inner and outer wall of shield 10 can be with
It is connected with each other by the end stop slot 60, it is possible thereby to the elasticity in structure be provided for shield 10, so that shield 10
Suitably it can expand and retract in radial directions.The ontology 16 of shield 10 is cylindrical shape, and locking ring 40 is located at ontology 16
Lower end at, locking ring 40 is from the lower end of ontology 16 towards protruding inwardly, so that the diameter of the innermost part of locking ring 40 is small
In the diameter of the inner wall of ontology 16.
External shell 20 is made of rigid material.For example, external shell 20 can be manufactured using aluminium alloy, it is hydraulic to reduce
The overall weight of stretcher, while also can reduce movement inertia of the hydraulic tensioner in working condition.In addition, external shell
20 can also be manufactured using cast iron.As shown in Fig. 2, one can be set in the peripheral surface of external shell 20 along the circumferential direction
The lock slots 30 of arrangement and an end stop portion 50.As depicted in figs. 1 and 2, in the assembled state, lock slots 30 and
End stop portion 50 is located at the downside of the lower end of sealing shroud 12.End stop portion 50 be located between two ends of lock slots 30 and
Prominent above-mentioned two end to separate lock slots 30 from lock slots 30, wherein preferably, lock slots 30 and described
End stop portion 50 extends a whole circumference around the periphery of the external shell 20 together.Preferably, in external shell 20
In the radial direction, the outer surface in end stop portion 50 can be flushed with the peripheral surface of external shell 20.End stop portion 50 can
It is integrated with being continuously formed with external shell 20.Can by circumferential direction along external shell 20, around external shell
20 periphery is machined into a recessed groove in the peripheral surface of external shell 20, and remaining a part is external
The peripheral surface of shell 20 is undressed to go out the groove, and forms above-mentioned lock slots 30 and above-mentioned end stop portion 50.It answers
The understanding, the wall that does not in the radial direction penetrate the external shell 20 of the lock slots 30 in external shell 20.
Fig. 1 and Fig. 2 respectively illustrates situation and the assembly of shield 10 after shield 10 is assembled on external shell 20
Situation before on to external shell 20.As depicted in figs. 1 and 2, when locking ring 40 is locked in lock slots 30 and at the same time holding
When portion's retainer 50 is locked in end stop slot 60, the assembling process of shield 10 is just completed.End stop portion 50
It can prevent shield 10 from rotating in engine operation process.
In hydraulic pressure unit 1 according to the present invention, it is provided with shield 10, the upper end of shield 10 extends at least past close
The shoulder segments outstanding of the transition portion 15 of big envelope 12, thus shield 10 can prevent the transition portion 15 of sealing shroud 12
Shoulder segments outstanding by external object shock and be damaged.It means that there is no the wind being seriously damaged for sealing shroud 12
Danger.
According to the present invention, the sealing shroud for protecting the hydraulic pressure unit 1 in hydraulic tensioner is achieved that by simply designing
12 purpose, and according to the solution of the present invention in 10 manufacturing cost of shield it is cheap, effectively can greatly reduce
The impaired risk of sealing shroud 12, solve the problems, such as possibility due to caused by sealing shroud 12 is impaired hydraulic oil leak.
A specific embodiment of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
The limitation to the invention patent protection scope therefore cannot be interpreted as.It should be pointed out that for the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made, these are all of the invention
Within protection scope.
Claims (6)
1. a kind of hydraulic pressure unit, comprising:
External shell (20)；
The cylinder body (3) being fixed at the first end of the external shell (20), the cylinder body (3) are located at the external shell
(20) in inner cavity；
Plunger (2), the plunger (2) and the cylinder body (3) cooperate, and the plunger (2) is in the external shell (20)
Extend in inner cavity towards the second end of the external shell (20)；
The plunger bushing (7) being fixedly connected with the plunger (2)；And
The first end of sealing shroud (12), the sealing shroud (12) is fixed to the plunger bushing (7), and the sealing shroud (12)
The second end is fixed to the external shell (20), so that the inner cavity of the external shell (20) is sealed,
It is characterized in that,
The external shell (20) is made of rigid material, and is provided in the peripheral surface of the external shell (20) along it
The lock slots (30) of circumferential direction arrangement and end stop portion (50)；And it is provided on the outside of the sealing shroud (12) anti-
Shield (10), for covering at least part of the sealing shroud (12), the shield (10) is made of elastic material, and institute
Stating shield (10) includes: columnar ontology (16)；Locking ring (40) at one end of the ontology (16), the lock
It is prominent towards the inside of the shield (10) from one end of the ontology (16) to determine ring (40), the locking ring (40) is for locking
Surely it arrives in the lock slots (30)；And end stop slot (60), the end stop slot (60) are stopped for accommodating the end
Dynamic portion (50), the lock slots (30) and the end stop portion (50) extend around the periphery of the external shell (20) together
One whole circumference.
2. hydraulic pressure unit according to claim 1, which is characterized in that the external shell (20) is by aluminium alloy or cast iron system
At.
3. hydraulic pressure unit according to claim 1 or 2, which is characterized in that the end stop slot (60) is along being parallel to
The direction of the central longitudinal axis of the shield (10) extends through the whole length of entire shield (10), and the end
Portion's locking groove (60) penetrates the entire wall thickness of the shield (10) along the radial direction of the shield (10).
4. hydraulic pressure unit according to claim 1 or 2, which is characterized in that the sealing shroud (12) is rubber sleeve.
5. a kind of shield for hydraulic pressure unit described according to claim 1 any one of -4, which is characterized in that described
Shield (10) is made of elastic material, and the shield (10) includes: columnar ontology (16)；Positioned at the ontology
(16) locking ring (40) at one end, the locking ring (40) is from one end of the ontology (16) towards the shield (10)
Inside it is prominent, the locking ring (40) is used to be locked to the lock slots (30) of the external shell (20) of the hydraulic pressure unit (1)
In；And end stop slot (60), the end stop slot (60) are used to accommodate the external shell (20) of the hydraulic pressure unit (1)
End stop portion (50).
6. shield according to claim 5, which is characterized in that the end stop slot (60) is described anti-along being parallel to
The direction of the central longitudinal axis of shield (10) extends through the whole length of entire shield (10), and the end stop
Slot (60) penetrates the entire wall thickness of the shield (10) along the radial direction of the shield (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510130129.9A CN106151351B (en) | 2015-03-24 | 2015-03-24 | Hydraulic pressure unit and its shield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510130129.9A CN106151351B (en) | 2015-03-24 | 2015-03-24 | Hydraulic pressure unit and its shield |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106151351A CN106151351A (en) | 2016-11-23 |
| CN106151351B true CN106151351B (en) | 2019-10-25 |
Family
ID=58063924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510130129.9A Active CN106151351B (en) | 2015-03-24 | 2015-03-24 | Hydraulic pressure unit and its shield |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106151351B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107387692B (en) * | 2017-08-25 | 2023-08-22 | 华南理工大学 | Hydraulic automatic tensioner for front end accessory of engine |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0989109A (en) * | 1995-09-28 | 1997-03-31 | Kyoraku Co Ltd | Protective cover as mechanical element |
| US6106424A (en) * | 1995-05-18 | 2000-08-22 | Ina Walzlager Schaeffler Ohg | Hydraulic tension device for a traction mechanism |
| DE10120879A1 (en) * | 2001-04-27 | 2002-10-31 | Ina Schaeffler Kg | Hydraulic engine mounting device has cylinder in casing as guide for piston with seal |
| JP2003240041A (en) * | 2002-02-15 | 2003-08-27 | Daytona:Kk | Bump rubber |
| KR100776217B1 (en) * | 2001-10-18 | 2007-11-16 | 주식회사 만도 | An alien substance permeation prevention device of a shock absorber |
| CN201561086U (en) * | 2009-11-04 | 2010-08-25 | 东风汽车有限公司 | Dust cover of shock absorber |
| CN201954005U (en) * | 2011-03-28 | 2011-08-31 | 周朝墒 | Waterproof device for automobile braking cable |
| CN202483503U (en) * | 2012-03-08 | 2012-10-10 | 天津汇铸石油设备科技有限公司 | Rubber barrel shoulder protector anti-channeling anchor ring |
| CN204083104U (en) * | 2014-09-11 | 2015-01-07 | 绵阳富临精工机械股份有限公司 | A kind of engine accessory belt hydraulic tensioner |
-
2015
- 2015-03-24 CN CN201510130129.9A patent/CN106151351B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6106424A (en) * | 1995-05-18 | 2000-08-22 | Ina Walzlager Schaeffler Ohg | Hydraulic tension device for a traction mechanism |
| JPH0989109A (en) * | 1995-09-28 | 1997-03-31 | Kyoraku Co Ltd | Protective cover as mechanical element |
| DE10120879A1 (en) * | 2001-04-27 | 2002-10-31 | Ina Schaeffler Kg | Hydraulic engine mounting device has cylinder in casing as guide for piston with seal |
| KR100776217B1 (en) * | 2001-10-18 | 2007-11-16 | 주식회사 만도 | An alien substance permeation prevention device of a shock absorber |
| JP2003240041A (en) * | 2002-02-15 | 2003-08-27 | Daytona:Kk | Bump rubber |
| CN201561086U (en) * | 2009-11-04 | 2010-08-25 | 东风汽车有限公司 | Dust cover of shock absorber |
| CN201954005U (en) * | 2011-03-28 | 2011-08-31 | 周朝墒 | Waterproof device for automobile braking cable |
| CN202483503U (en) * | 2012-03-08 | 2012-10-10 | 天津汇铸石油设备科技有限公司 | Rubber barrel shoulder protector anti-channeling anchor ring |
| CN204083104U (en) * | 2014-09-11 | 2015-01-07 | 绵阳富临精工机械股份有限公司 | A kind of engine accessory belt hydraulic tensioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106151351A (en) | 2016-11-23 |
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