CN109185408A - A kind of hydraulic stem and the hydraulic tensioner with the hydraulic stem - Google Patents
A kind of hydraulic stem and the hydraulic tensioner with the hydraulic stem Download PDFInfo
- Publication number
- CN109185408A CN109185408A CN201811273746.4A CN201811273746A CN109185408A CN 109185408 A CN109185408 A CN 109185408A CN 201811273746 A CN201811273746 A CN 201811273746A CN 109185408 A CN109185408 A CN 109185408A
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- China
- Prior art keywords
- shell
- hydraulic stem
- cylinder
- retaining ring
- hydraulic
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
- F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/18—Means for guiding or supporting belts, ropes, or chains
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0802—Actuators for final output members
- F16H2007/0812—Fluid pressure
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
Hydraulic stem of the present invention and hydraulic tensioner with the hydraulic stem increase connector between hydraulic stem cylinder and shell compared to traditional hydraulic stem or hydraulic tensioner, prevent cylinder to be detached from shell, increase the de- pull out force of cylinder.
Description
Technical field
The present invention relates to a kind of hydraulic stem and in the hydraulic tensioner of the hydraulic stem, especially automobile belt transmission system
Hydraulic tensioner for tension band.
Background technique
Main function of the hydraulic tensioner in automobile belt transmission system is to guarantee such as water pump, sky for being tensioned transmission belt
The normal operation for adjusting compressor or generator etc., currently there are hydraulic tensioner structure such as Publication No. special open
The Japan Patent of 2000-205356, the cylinder and shell of hydraulic tensioner are generally using the connection type of interference fit, Ci Zhongjie
Structure causes hydraulic tensioner to fail there are the risk that cylinder falls off from shell.
Summary of the invention
The main object of the present invention is to provide the hydraulic stem of the new structure of one kind and the hydraulic tensioner with the hydraulic stem,
Risk for overcoming cylinder to fall off from shell increases the de- pull out force of cylinder.
To achieve the above object, the present invention is implemented with the following technical solutions:
A kind of hydraulic stem, can be fixed including one end and can around fixing end swing tubbiness shell；
Positioned at shell, cylinder that interior close shell fixing end one end is fixedly connected with housing bottom；
Far from the plunger assembly that shell fixing end one end is connect with shell and cylinder, plunger assembly is being limited relative to cylinder
It can be moved up and down in stroke；
The axial bias piece between plunger assembly and shell；
It further include connector, the connector connection shell and cylinder.
To prevent housing distortion, and convenient for assembly, on the outside of the cylinder with step surface, connector portion are set at connector cooperation
Quartile is on step surface, and limitation cylinder is relative to the moved axially upward of shell.
For the cooperation convenient for connector and step surface, the step surface was arranged along cylinder lateral surface one week or interval setting.
The hydraulic stem further includes having the oilhole channel for being connected to housing bottom face, preferred oilhole channel, oilhole channel with
Interconnecting piece is arranged along shell circumferencial direction interval.
The connector is pin, which gos deep into enclosure interior by shell, partially on the step surface of cylinder, limitation
Cylinder is moved axially upward relative to shell, and to prevent hydraulic fluid leak, pin and oilhole channel spacing are arranged.
Interchangeable pin can act directly against on cylinder, apply certain pressure to cylinder, limit cylinder relative to shell
The axial movement of body.
The connector can be retaining ring, be provided with protruding portion on retaining ring, and annular groove, the protruding portion assembly of retaining ring are provided on shell
It is located in annular groove afterwards, cylinder is provided with step surface, and retaining ring radially inner side is located on step surface.
To assemble convenient for retaining ring, oilhole channel is stairstepping in the axial section of shell, and stop portion is located at step-like
On face.
A kind of deformation is done, annular groove can be the slot of interval branch along shell circumferencial direction, and the protruding portion tool on moon retaining ring
There is identical number.
Interchangeable retaining ring can be replaced circlip for shaft.
A kind of hydraulic tensioner that the present invention also provides, including belt wheel, band wheel arm and hydraulic stem, the band wheel arm have rotation
Shaft, the hydraulic stem is rotatable to be connected to band wheel arm, and driving pulley arm is swung around rotary shaft, and the belt wheel is installed to band
It can rotate in wheel arm and relative to band wheel arm, which is the hydraulic stem using any of the above technical solution.
Using hydraulic stem or hydraulic tensioner of the invention, due to increasing connector between shell and cylinder, compared to biography
The connection type of system further limits movement of the cylinder relative to shell, and cylinder is prevented to be detached from shell, improves the de- of cylinder
Pull out force prevents the failure of hydraulic stem or hydraulic tensioner.
Detailed description of the invention
Fig. 1 is the first specific embodiment sectional view；
Fig. 2 is B-B position profile figure in Fig. 1；
Fig. 3 is the first specific embodiment part parts locally sectional view；
Fig. 4 is second embodiment sectional view；
Fig. 5 is that second embodiment assembles retaining ring process schematic；
Fig. 6 is the second implementation shell partial schematic diagram
Fig. 7 is B-B position profile figure in Fig. 4；
Fig. 8 is the position A partial enlarged view in Fig. 4；
Fig. 9 is hydraulic tensioner schematic diagram.
Specific embodiment
It is that specific embodiments of the present invention will be described in detail based on attached drawing below.
As shown in Figure 1, hydraulic stem has the shell 1 of barrel-like structure, 1 fixing end of shell is closed one end, relative to solid
The other end of fixed end is opening shape.1 fixing end of shell is provided with a through-hole, bushing 2 is packed into through-hole, and be located at bushing 2
Guide 3 that is interior, being rotated around bushing 2；Shell 1 is connected in fixation member by pin (not shown) by guide 3, such as engine sheet
On body or on engine support mounting surface, therefore shell 1 can be swung around the central axis of bushing 2.
Interconnecting piece is provided on the inside of 1 fixing end of shell, columnar cylinder 4 is located in shell and lower end and the shell 1 exist
It is fixedly connected at interconnecting piece.The lower end of cylinder 4 is internally provided with check valve 13.
Plunger assembly 20 is located at one end of the opening of shell 1, including plunger 10, plunger bushing 9 and dust cover 8, consolidates between three
Fixed connection, generally interference fit connection.10 part of plunger is located in cylinder 4 and can limit in stroke relative to cylinder 4
Lower movement；Pressure chamber 16 is formed between cylinder 4, plunger 10 and check valve 13；Plunger bushing 9 is located at the periphery of plunger 10；Shell 1
Be provided with sealing element 7 on the inside of open end and between adjacent plunger bushing 9, i.e., sealing element 7 be located in radial directions plunger bushing 9 with
Between shell 1.Shell 1, cylinder 4, forms fluid reservoir 17 between 10 5 parts of plunger bushing 9 and plunger at sealing element 7；Sealing element 7
It can prevent liquid leakage while can prevent dust from entering fluid reservoir 17；Dust cover 8 is located at 20 outermost radial outside of plunger assembly, covering
The opening of plunger assembly 20 and shell 1, further prevent dust etc. enter fluid reservoir 17.
Structure in the prior art can also be used, dust cover 8 is wholely set with plunger bushing 9, and plunger 10 is firmly connected with it.
Bias piece 6, the present embodiment are compressed spring, on the nutted rod axial direction of hydraulic tensioner be located at shell 1 with
Between plunger bushing 9, spring one end is connect with shell 1, and the other end is connect with plunger bushing 9, spring Columns plug sleeve 9 and shell always
1, make plunger 10 always with the trend to the end motion far from 1 fixing end of shell.To prevent spring from contacting generation with shell 1
Friction, spring abut the settable gasket 5 in place with shell 1.
10 top of plunger is similar with the fixed end structure of shell 1, is provided with a through-hole, and through-hole interference is packed into bushing 11；Guide
12 are arranged in bushing 11, can rotate freely relative to bushing 11；Pin or bolt pass through guide 12 and are connected to swingable part
On, such as in the band wheel arm 32 of hydraulic tensioner shown in Fig. 9.
As shown in Figure 1, 2, 3, the oilhole channel 15 axially extended, and circumferencial direction are provided on the inside of 1 fixing end of shell
It is evenly spaced on.When plunger 10 moves upwards i.e. end motion fixed far from shell 1, the volume in pressure chamber 16 becomes larger, then
Pressure accordingly reduces, and when the pressure in pressure chamber 16 is lower than the pressure in fluid reservoir 17, the oil in fluid reservoir 17 is passed sequentially through
Oilhole channel 15, check valve 13 enter pressure chamber 16.Usual cylinder 4 is with 1 interconnecting piece of shell circumferentially using the side of interference fit
Formula connection, thus the interconnecting piece of cylinder 4 and shell 1 with oilhole channel 15 is circumferentially spaced is alternately distributed.
When plunger 10 is moved relative to shell 1 to shortening direction by external force, when the pressure ratio liquid storage in pressure chamber 16
When pressure in room 17 is high, check valve 13 is closed, due to the variation of the volume of pressure chamber 16, hydraulic oil in pressure chamber 16 via
Gap between cylinder 4 and plunger rod 10 flows into fluid reservoir 17, since liquid has certain viscosity, and then generates damping force,
Enable stretcher smooth motion.
In this creation, the link position of cylinder 4 and shell 1 is additionally provided with connector, for connecting shell 1 and cylinder 4,
Increase the attachment force between shell 1 and cylinder 4, the connector in the present embodiment is pin 14.Specifically, the company on shell 1
Socket part position is provided with the hole for placing pin 14 with internal connection, to avoid hydraulic oil from leaking outside, placing column in the radial direction
The position in oilhole channel 15 is avoided in the hole of pin, and pin 14 is put into shell 1 by column pin hole, and 14 end of pin abuts against cylinder
On 4, apply certain pressure to cylinder 4, limits axial movement of the cylinder 4 relative to shell 1.To prevent hydraulic oil from leaking outside, column
Pin is cooperated by the way of force fit with shell.To make 4 uniform force of cylinder, pin is symmetrical using circumference, such as two,
The multiple of three or this numerical value.Due to increasing connector between cylinder 4 and shell 1, increases the de- of hydraulic stem cylinder 4 and pull out
Power can prevent cylinder 4 to be detached from shell 1, prevent hydraulic stem from failing.
To prevent pin 14 from causing the local deformation of cylinder 4 when being pressed into and in order to further increase the de- pull out force of cylinder 4,
Cylinder 4 opens corresponding step surface 40 ' in the mated position with pin, step surface be cylinder 4 with pin cooperation at due to cylinder
The step surface (specifically can be referring to shown in Fig. 1 and Fig. 8) that the up-small and down-big diameter difference of outer diameter is formed, pin partially protrudes into platform
40 ' top of terrace, pin 14 are limited in shell axial direction by step surface 40 ', prevent cylinder 4 from transporting axially upwards with respect to shell 1
It is dynamic.Step surface can be corresponding with pin 14, is arranged along cylinder circumferencial direction interval, for convenient for assembly, step surface was along cylinder 4 one weeks
Setting.It may also set up the groove 30 of forming U shaped articles structure, step surface is the downside of groove 30, since pin partially protrudes into groove
Interior, when cylinder 4 is moved upwards by external force relative to shell 1, then pin withstands groove downside 40 ', limits cylinder 4
Movement.
Second specific embodiment increases connector as shown in Fig. 4 to Fig. 8, in the link position of cylinder 4 and shell 1, this
Connector is retaining ring 24 in embodiment.Specifically, in 1 bottom inside of shell, circumferentially there are four axially extending extremely along shell for setting
The oilhole channel 15 of 1 bottom faces of shell, at the same on shell 1, annular groove 41 is provided with above interconnecting piece.Oilhole channel 15 is by annular groove
41 are divide into upper part and lower part, the first oilhole channel 151 on annular groove top and the second oilhole channel 152 of annular groove lower part, such as Fig. 6 institute
Show.Since retaining ring 24 has certain width, annular groove 41 and 151 annular groove top of the first oilhole channel and the second oilhole channel 152
Step difference is formed at the annular groove lower part of connection, and the internal diameter of annular groove lower part is less than the internal diameter on annular groove top.Therefore oilhole channel 15 is along shell
The axial section of body is ladder-like at continuous L-type.
Cylinder 4 is provided with the radial step surface 40 of protrusion in the interconnecting piece top position with shell 1, and step surface 40 is in axial direction
It is substantially concordant with annular groove lower part upper surface 43 on direction, there can be small size difference of height.
Preferably, annular groove 41 was arranged around shell 1 one weeks, in other embodiments, or separated multisection type.Ring
The outer diameter of slot 41 is less than or equal to oilhole channel 15 and is located at the full-size of shell 1 radially.It specifically can be referring to Fig. 5, Fig. 7, Fig. 8
Shown, the substantially circular ring shape of retaining ring 24, there are four protruding portions 42 for setting on the direction to extend radially outwardly, and protruding portion 42 is most
Major diameter is less than or equal to the diameter of annular groove 41；24 internal diameter of retaining ring is less than the maximum gauge of step surface 40, is greater than or equal to step
The minimum diameter in face 40.For convenient for assembly, the preferably greater than minimum diameter of step surface 40.After cylinder 4 is put into shell 1, retaining ring
Protruding portion 42 by oilhole channel 15, retaining ring 24 is put into shell 1,24 radially inner side of retaining ring is located at the step surface of cylinder 4
40 top, contact or slightly above step surface 40, rotation retaining ring 24 avoid oilhole channel 15, screw in the protruding portion 42 of retaining ring 24
Into the annular groove 41 of shell 1.Retaining ring 24 limits the movement of cylinder 4 in the axial direction relative to shell 1, due to cylinder 4 and shell
Connector retaining ring 24 is increased between body 1, compared to the de- pull out force that the hydraulic stem of traditional structure improves hydraulic stem cylinder 4.
Further, it is detached from annular groove 41 after rotating out of annular groove 41 during the motion for anti-Sealing shield ring 24, causes retaining ring
24 failures, the top of riveting annular groove 41 after being packed into retaining ring 24 makes annular groove upper deformation, and then retaining ring 24 is pressed on annular groove
It is interior, limit the movement of retaining ring 24.
Alternatively, segmentation structure can also be used in annular groove 41, is only arranged in 15 side left-right position of oilhole channel, is packed into
Retaining ring 24, rotation retaining ring avoid oilhole channel 15, and riveting annular groove top makes its deformation, and limitation retaining ring 24 moves.
Alternatively, circlip for shaft can be used in connector, and cylinder 4 can also be adopted at the cooperation with circlip for shaft
With the ring-shaped groove structure in first embodiment.Due to the C-shaped structure that circlip for shaft is opening, and there is certain bullet
Property, thus after being packed on the inside of retaining ring since elasticity is caught in cylinder groove, the protruding portion that rotation retaining ring keeps it external screws in annular groove
Interior, riveting annular groove top makes its deformation, limitation retaining ring movement, circlip for shaft can also special processing increase retaining ring 24 it is similar
Protruding portion.
Since connector needs to bear certain axial force, connector need to use the material of higher-strength, such as 45 steel.
The invention also includes the hydraulic tensioners using the above hydraulic stem, as shown in figure 9, one end A of hydraulic stem 100 is installed
To engine mounting face or engine support mounting surface, the other end B of hydraulic stem 100 can mount to the belt wheel of hydraulic tensioner
On arm 32, belt wheel 33 is rotatably mounted in band wheel arm 32, and band wheel arm 32 can be rotated around band wheel arm rotary shaft 31, for being tensioned
For transmission belt 34 when the tension of band in engine operating becomes larger, the cylinder of hydraulic stem 100 is with respect to housing compresses until effect and liquid
The active force of external force and bias piece on compression bar reaches balance.When the tension of transmission belt becomes smaller, biasing spring drives hydraulic stem
Cylinder stretches, until effect and the active force of external force and bias piece on hydraulic stem reach balance, realizes and transmission belt is kept to have
Certain tension guarantees effective operation of transmission system.
It is involved in the present invention upwards, downwards, upper end, lower end etc. all with the description done based on the situation in attached drawing, so as to
It is not the limitation to this creation in understanding.This creation simultaneously is attached with other connectors also can be used, as long as not taking off
It is included within the scope of protection of the present invention from the modification etc. carried out on the basis of present inventive concept.
Claims (11)
1. a kind of hydraulic stem (100), the shell (1) of tubbiness that can fix and can be swung around fixing end including one end；
The cylinder (4) being fixedly connected with shell in interconnecting piece position in shell (1) close to shell (1) fixing end；
Far from the plunger assembly (20) that shell fixing end one end is connect with shell and cylinder (4), plunger assembly (20) is relative to cylinder
Body (4) is being limited in stroke and can moved up and down；
The axial bias piece (6) between plunger assembly 20 and shell (1)；
It is characterized in that, further include connector, connector connection shell (1) and cylinder (4).
2. hydraulic stem as described in claim 1, which is characterized in that the cylinder (4) is provided with step surface (40,40 '), described
Connector part is located on step surface (40,40 ').
3. hydraulic stem as claimed in claim 2, which is characterized in that the step surface is to be arranged within lateral surface one week along cylinder (4)
Or interval setting.
4. hydraulic stem as described in claim 1, which is characterized in that be additionally provided in shell (1) and be connected to housing bottom face
Oilhole channel (15), the oilhole channel (15) are uniformly distributed along shell (1) circumferencial direction interval.
5. the hydraulic stem as described in Claims 1-4 is any, which is characterized in that the connector is pin (14), the pin
(14) it is arranged with oilhole channel (15) interval.
6. hydraulic stem as described in claim 1, which is characterized in that the connector is pin (14), pin (14) top
It leans against on cylinder (4).
7. the hydraulic stem as described in Claims 1-4 is any, which is characterized in that the connector is retaining ring (24), the retaining ring
(24) there are protruding portion (42), the shell (1) is provided with annular groove (41), and the protruding portion (42) of the retaining ring (24) is located at annular groove
(41) in, the cylinder (4) is provided with step surface (40,40 '), and the retaining ring (24) is located on step surface (40,40 ').
8. hydraulic stem as claimed in claim 7, which is characterized in that be additionally provided in shell (1) and be connected to housing bottom face
Oilhole channel (15), the oilhole channel (15) are stairstepping in shell axial section.
9. hydraulic stem as claimed in claim 8, which is characterized in that the circumferentially spaced distribution of the annular groove (41), and with
Protruding portion (42) number on retaining ring (24) is identical.
10. hydraulic stem as claimed in claim 9, which is characterized in that the retaining ring can be replaced circlip for shaft.
11. a kind of hydraulic tensioner, including belt wheel (33), band wheel arm (32) and hydraulic stem, the band wheel arm (32) have rotation
Axis (31), the hydraulic stem is rotatable to be connected to band wheel arm (32), and driving pulley arm is swung around rotary shaft (31), the band
It takes turns in (33) installation to band wheel arm (32) and can be rotated relative to band wheel arm, which is characterized in that the hydraulic stem is claim 1
To 10 described in any item hydraulic stems.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811273746.4A CN109185408B (en) | 2018-10-18 | 2018-10-18 | Hydraulic rod and hydraulic tensioner with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811273746.4A CN109185408B (en) | 2018-10-18 | 2018-10-18 | Hydraulic rod and hydraulic tensioner with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109185408A true CN109185408A (en) | 2019-01-11 |
| CN109185408B CN109185408B (en) | 2023-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811273746.4A Active CN109185408B (en) | 2018-10-18 | 2018-10-18 | Hydraulic rod and hydraulic tensioner with same |
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| Country | Link |
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| CN (1) | CN109185408B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113969962A (en) * | 2020-07-22 | 2022-01-25 | 广州汽车集团股份有限公司 | Tensioner and automobile engine transmission system with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113969962A (en) * | 2020-07-22 | 2022-01-25 | 广州汽车集团股份有限公司 | Tensioner and automobile engine transmission system with same |
| CN113969962B (en) * | 2020-07-22 | 2023-11-21 | 广州汽车集团股份有限公司 | Tensioner and automobile engine transmission system with same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109185408B (en) | 2023-09-29 |
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