CN204344582U - Oil hydraulic circuit - Google Patents
Oil hydraulic circuit Download PDFInfo
- Publication number
- CN204344582U CN204344582U CN201420792224.6U CN201420792224U CN204344582U CN 204344582 U CN204344582 U CN 204344582U CN 201420792224 U CN201420792224 U CN 201420792224U CN 204344582 U CN204344582 U CN 204344582U
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- China
- Prior art keywords
- conical surface
- oilhole
- hydraulic circuit
- oil hydraulic
- downstream side
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- 239000003921 oil Substances 0.000 claims abstract description 27
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 23
- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- 239000010721 machine oil Substances 0.000 claims abstract description 10
- 239000010705 motor oil Substances 0.000 claims abstract description 5
- 239000012530 fluid Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
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- Control Of Transmission Device (AREA)
Abstract
The utility model provides a kind of oil hydraulic circuit.This oil hydraulic circuit possesses two valve bodies and is configured in the demarcation strip between these two valve bodies, oily passage is formed respectively in two valve bodies, demarcation strip is provided with the oilhole of the oily passage of connection two valve bodies, machine oil flows through oilhole toward the direction, the inner peripheral surface of oilhole has, from the upstream side of the engine oil flow of this oilhole towards the 1st conical surface of downstream side undergauge; And being positioned at the downstream side of the 1st conical surface and the 2nd conical surface from upstream side towards downstream side undergauge, the diameter reducing rate of the 2nd conical surface is less than the diameter reducing rate of the 1st conical surface.Based on structure of the present utility model, can prevent from, in the oilhole of demarcation strip, air pocket occurs.
Description
Technical field
The utility model relates to oil hydraulic circuit, the oil hydraulic circuit assembled in the machinery such as automatic transmission of particularly a kind of vehicle.
Background technique
Usually, the oil hydraulic circuit assembled in the machinery such as the automatic transmission of vehicle possesses, the various valves (such as, control valve) etc. installed in valve body and this valve body, is formed with the oily passage of the part forming this oil hydraulic circuit in valve body.Valve body is such as made up of the 1st valve body (such as sub-body) and the 2nd valve body (such as upper body), is configured with demarcation strip between the 1st valve body and the 2nd valve body.Demarcation strip is provided with the oilhole (through hole) of the oily channel connection of the oily passage of the 1st valve body and the 2nd valve body (such as with reference to patent documentation 1).
Patent Document 1 discloses a kind of structure of the oilhole (oily port hole) be arranged on demarcation strip, the inner peripheral surface of this oilhole is processed to, from inlet side (upstream side) towards outlet side (downstream side) with the bending conical surface of curved surface (curved surface protruded inside hole) undergauge (radius of oilhole diminishes gradually).
In this oil hydraulic circuit, such as, the hydraulic pressure of the oily passage of the 1st valve body is set to be higher than the hydraulic pressure of the oily passage of the 2nd valve body, and the flow flowing to the machine oil of the oily passage of the 2nd valve body of low voltage side from the oily passage of this on high-tension side 1st valve body is controlled by the oilhole be located at demarcation strip.
Thus, oil hydraulic circuit as above, namely in the oil hydraulic circuit that the front and back pressure difference of oilhole is larger, if the inner peripheral surface of the oilhole be located on demarcation strip to be configured to the bending conical surface (curved surface to hole inner bulge), then the change of the flow path cross sectional area of oilhole is comparatively remarkable, pressure in oilhole changes greatly, thus likely air pocket occurs.If there occurs air pocket, then the operation sound of fluid can become large.In addition, the fluid including air pocket likely causes the parts etc. in oil hydraulic circuit to be etched.
[patent documentation 1]: Japanese Unexamined Patent Publication 10-296691 publication
Model utility content
For above-mentioned technical problem, the purpose of this utility model is, provides a kind of oil hydraulic circuit with the structure that air pocket can be suppressed to occur.
As the technological scheme solved the problems of the technologies described above, the utility model provides a kind of oil hydraulic circuit.This oil hydraulic circuit possesses two valve bodies and is configured in the demarcation strip between these two valve bodies, oily passage is formed respectively in described two valve bodies, described demarcation strip is provided with the oilhole of the oily passage being communicated with described two valve bodies, machine oil flows through described oilhole toward the direction, it is characterized in that: the inner peripheral surface of described oilhole has, from the upstream side of the engine oil flow of this oilhole towards the 1st conical surface of downstream side undergauge (radius of oilhole reduces gradually); And be positioned at the downstream side of described 1st conical surface and from upstream side towards the 2nd conical surface of downstream side undergauge (radius of oilhole reduces gradually), the diameter reducing rate of described 2nd conical surface is less than the diameter reducing rate of described 1st conical surface.
The advantage with the oil hydraulic circuit of the present utility model of said structure is, can suppress to be located in the oilhole on demarcation strip air pocket occurs.
Specifically, because the inner peripheral surface of oilhole is configured to, there is the 1st conical surface from the upstream side of this oilhole towards downstream side undergauge; And be positioned at the 1st conical surface downstream side and from upstream side towards downstream side undergauge but diameter reducing rate is less than two sections of such cone structures of the 2nd conical surface of the 1st conical surface, so, the flow path cross sectional area of oilhole gently reduces from upstream side towards downstream side, the pressure in oilhole is changed comparatively slow.Thus, compared with the structure being configured to one section of conical surface (conical surface) with the inner peripheral surface of oilhole, air pocket is less likely to occur, the operation sound of fluid can be reduced.Further, owing to inhibit the generation of air pocket, the parts etc. in oil hydraulic circuit can also be prevented to be etched.
In above-mentioned oil hydraulic circuit of the present utility model, be preferably, the downstream of described 1st conical surface is connected by arc shaped surface with between the upstream extremity of described 2nd conical surface.Adopting this structure, there is not step in the attachment portion between the 1st conical surface and the 2nd conical surface, and thus, machine oil can flow smoothly in oilhole, thus can more effectively suppress air pocket to occur.
Accompanying drawing explanation
Fig. 1 represents the valve body of oily passage and the sectional view of demarcation strip thereof that are formed with oil hydraulic circuit.
Fig. 2 is that the oilhole be provided with by the demarcation strip shown in Fig. 1 amplifies the sectional view represented.
Embodiment
Below, with reference to accompanying drawing, mode of execution of the present utility model is described.In the present embodiment, example structure of the present utility model being applied to the oil hydraulic circuit assembled in the automatic transmission of vehicle is shown.As shown in Figure 1, in oil hydraulic circuit 100, be provided with the 1st valve body 1, the 2nd valve body 2 and demarcation strip 3.
In the 1st valve body 1, be formed with oily passage (oil groove) 1a of the part forming oil hydraulic circuit 100, in the 2nd valve body 2, be also formed with oily passage (oil groove) 2a of the part forming oil hydraulic circuit 100.In these two valve bodies, in the 2nd valve body 2, be provided with the valve pocket (not shown) be connected with oily passage 2a.The spool etc. of control valve is such as accommodated in valve pocket.In addition, in present embodiment, the hydraulic pressure of the oily passage 1a of the 1st valve body 1 is set to be higher than the hydraulic pressure of the oily passage 2a of the 2nd valve body 2, and the pressure difference between the hydraulic pressure in the hydraulic pressure on high-tension side 1st valve body 1 and the 2nd valve body 2 of low voltage side is larger.
Demarcation strip 3 is provided with between 1st valve body 1 and the 2nd valve body 2.Demarcation strip 3 is fixedly connected with by bolt (not shown) with the 1st valve body 1 and the 2nd valve body 2.
Demarcation strip 3 is provided with the oilhole (through hole) 31 be communicated with the 2nd valve body 2a by the oily passage 1a of the 1st valve body 1.Oilhole 31 is through holes of the flow of the machine oil (machine oil flowed in the direction to the dotted arrow indication of Fig. 1) that the oily passage 2a for controlling the 2nd valve body 2 from the oily passage 1a of on high-tension side 1st valve body 1 to low voltage side flows.
As shown in Figure 2, the inner peripheral surface of oilhole 31 has, from the upstream side of the engine oil flow (engine oil flow shown in the dotted arrow of Fig. 1) of this oilhole 31 towards the 1st conical surface (conical surface) 31a of downstream side undergauge; Be positioned at the downstream side of the 1st conical surface 31a and the 2nd conical surface (conical surface) 31b from upstream side towards downstream side undergauge; And be positioned at the straight cylindrical surfaces 31c in downstream side of the 2nd conical surface 31b.That is, from upstream side to downstream side, the inner peripheral surface of oilhole 31 is formed with successively continuously the 1st conical surface 31a, the 2nd conical surface 31b and straight cylindrical surfaces 31c, the upstream extremity of the 1st conical surface 31a is machine oil inflow entrance, and the downstream of straight cylindrical surfaces 31c is machine oil outflow opening.In addition, the respective center line of the 1st conical surface 31a, the 2nd conical surface 31b and straight cylindrical surfaces 31c is all located along the same line.
Further, in the present embodiment, the diameter reducing rate (radius changing rate) of the 2nd conical surface 31b is less than the diameter reducing rate of the 1st conical surface 31a.Specifically, such as, the cone angle of the 1st conical surface 31a is 90 °; The cone angle of the 2nd conical surface 31b is 40 °, thus the diameter reducing rate of the 2nd conical surface 31b is less than the diameter reducing rate of the 1st conical surface 31a.Further, in the present embodiment, be connected by arc shaped surface (convex surface) between the downstream of the 1st conical surface 31a and the upstream extremity of the 2nd conical surface 31b, thus there is not step in the attachment portion between the 1st conical surface 31a and the 2nd conical surface 31b.In addition, be connected by arc shaped surface (convex surface) between the downstream of the 2nd conical surface 31b and the upstream extremity of straight cylindrical surfaces 31c, thus there is not step in the attachment portion between the 2nd conical surface 31b and straight cylindrical surfaces 31c.
As described above, based on the structure of present embodiment, because the inner peripheral surface of oilhole 31 is configured to, there is the 1st conical surface 31a from the upstream side of this oilhole 31 towards downstream side undergauge (radius of oilhole 31 is more and more less); And be positioned at the 1st conical surface 31a downstream side and from upstream side towards downstream side undergauge but diameter reducing rate is less than two sections of such cone structures of the 2nd conical surface 31b of the 1st conical surface 31a, so, the flow path cross sectional area of oilhole 31 comparatively gently narrows from upstream side towards downstream side, and the pressure in oilhole 31 is slowed down.Thus, can prevent air pocket from occurring, reduce the motion and sound of fluid.In addition, owing to inhibit the generation of air pocket, so can prevent the parts etc. in oil hydraulic circuit from suffering erosion.
In addition, in present embodiment, the downstream of the 1st conical surface 31a is connected by arc shaped surface with between the upstream extremity of the 2nd conical surface 31b; Being connected by arc shaped surface between the downstream of the 2nd conical surface 31b and the upstream extremity of straight cylindrical surfaces 31c, there is not step in each attachment portion, and thus, the machine oil in oilhole 31 can flow smoothly, thus can more effectively suppress air pocket to occur.
In present embodiment, the 1st conical surface 31a of oilhole 31, the various piece of the 2nd conical surface 31b and straight cylindrical surfaces 31c are obtained by cutting.Compared with adopting the situation of punch process mode, make oilhole 31 by cutting and the shape of oilhole 31 can be made more stable.Namely, when adopting punch process mode to carry out making, the Plastic Flow that excess thickness causes can affect the stability of shape, and adopts cutting mode to make, the problem of the Plastic Flow that then there will not be this excess thickness to cause, thus the oilhole 31 that can make dimensionally stable.
In present embodiment, be provided with straight cylindrical surfaces 31c, but the utility model is not limited to this in oilhole 31, also can is, the inner peripheral surface of oilhole 31 be only made up of the 1st conical surface 31a and the 2nd conical surface 31b.
Claims (2)
1. an oil hydraulic circuit, possess two valve bodies and be configured in the demarcation strip between these two valve bodies, be formed with oily passage respectively in described two valve bodies, described demarcation strip is provided with the oilhole of the oily passage being communicated with described two valve bodies, machine oil flows through described oilhole toward the direction, it is characterized in that:
The inner peripheral surface of described oilhole has, from the upstream side of the engine oil flow of this oilhole towards the 1st conical surface of downstream side undergauge; And being positioned at the downstream side of described 1st conical surface and the 2nd conical surface from upstream side towards downstream side undergauge, the diameter reducing rate of described 2nd conical surface is less than the diameter reducing rate of described 1st conical surface.
2. oil hydraulic circuit as claimed in claim 1, is characterized in that:
The downstream of described 1st conical surface is connected by arc shaped surface with between the upstream extremity of described 2nd conical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420792224.6U CN204344582U (en) | 2014-12-12 | 2014-12-12 | Oil hydraulic circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420792224.6U CN204344582U (en) | 2014-12-12 | 2014-12-12 | Oil hydraulic circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204344582U true CN204344582U (en) | 2015-05-20 |
Family
ID=53227854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420792224.6U Active CN204344582U (en) | 2014-12-12 | 2014-12-12 | Oil hydraulic circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204344582U (en) |
-
2014
- 2014-12-12 CN CN201420792224.6U patent/CN204344582U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |