CN201373097Y - Line-contact spherical hinge kinematic pair - Google Patents
Line-contact spherical hinge kinematic pair Download PDFInfo
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- CN201373097Y CN201373097Y CN200920035642U CN200920035642U CN201373097Y CN 201373097 Y CN201373097 Y CN 201373097Y CN 200920035642 U CN200920035642 U CN 200920035642U CN 200920035642 U CN200920035642 U CN 200920035642U CN 201373097 Y CN201373097 Y CN 201373097Y
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- piston
- spherical
- hole
- spherical hinge
- spherical crown
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Abstract
The utility model discloses a line-contact spherical hinge kinematic pair. The line-contact spherical hinge kinematic pair comprises a connection rod, a piston and a cylinder body, wherein the top spherical crown of the connection rod keeps contact fit with an inner ball socket of the piston; and a balance oil hole penetrating the inner ball socket is formed at the middle part of the top surface of the piston. The inner ball socket of the piston is a profile hole, wherein an upper taper hole at the upper end is tangent to the top spherical crown of the connection rod; a spherical hole is formed on the middle segment; and a lower taper hole is formed at the bottom end, of which the top end is tangent to the spherical hole in a position parallel to the spherical crown center of the connection rod. When the spherical crown of the connection rod is matched with the upper taper hole of the piston, the center distance H between the connection rod and the piston is 0.5 mm to 1.2 mm, and a wedge angle is formed at the linear contact between a straight line and a curved surface of the spherical crown and the piston. Accordingly, lubricant entering from a balance oil hole is likely to form a wedge-shaped lubricant film at the wedge angle, and the wedge-shaped lubricant film can directly improve the lubrication condition of a spherical hinge structure, thereby effectively obviating the occurrence of sintering accidents of the spherical hinge structure under heavy load due to the shortness of lubricant. The line-contact spherical hinge kinematic pair can keep lubrication under heave load, and has the advantages of flexible rotation, less heat generation and long service life. Accordingly, the line-contact spherical hinge kinematic pair is particularly suitable for a spherical hinge structure in a large-power hydraulic motor.
Description
Technical field
The utility model relates to a kind of mechanical motion pair, particularly a kind of spherical hinge structure that is adapted at motion under the heavy load.
Background technique
The linkage structure of craspedodrome piston and swing connecting bar is spherical hinge structure in the dynamic power machine.The spherical hinge structure of prior art is that connection rod sphere contacts with ball-and-socket face in the piston, and surface of contact is big more between the two, and specific contact pressure is more little, shows that then this spherical hinge structure fit quality is good more.The traditional spherical hinge structure of this kind is widely used in the machinery powered by conventional energy, satisfies the transmission of power requirement fully.Along with manufacturing development, the equipment of maximization, heavy loading need be equipped with the power plant of corresponding power, the spherical hinge structure of prior art is applied in the high-power hydraulic transmission, the spherical hinge structure that is connected with piston because of connecting rod bears heavy load, between surface of contact, be difficult for setting up lubricant film, the heat that kinetic friction produces is difficult for leaving, the just very fast inefficacy of this spherical hinge structure under this operating mode, and the inefficacy form of expression mainly is that spherical hinge structure is killed mutually.
The model utility content
The utility model is primarily aimed at prior art is difficult for setting up lubricant film under the heavy load condition deficiency, propose a kind of simple in structure, easy to manufacture, enough lubricant films are arranged during heavy load, make rotate flexibly, heating value is few, the line contact type spherical hinge kinematic pair of long service life.
The utility model is achieved through the following technical solutions technical goal.
Line contact type spherical hinge kinematic pair, it comprises connecting rod, piston and cylinder body.Described connecting rod top is provided with the spherical crown that radius is Rg, and this spherical crown touches with piston endosphere socket and spigot joint and cooperates, the balance oil hole of ball-and-socket in the piston-top surface middle part is provided with and connects.Its improvements are: the interior ball-and-socket of described piston is an irregularly-shaped hole, the last taper hole and the connecting rod top spherical crown that are in the upper end are tangent, the spherical pore radius that is in the stage casing is Rw, and the bottom is a lower cone hole, and the lower cone hole upper end is tangent at the equal place, spherical crown center of connecting rod with spherical pore.When the spherical crown of described connecting rod cooperated with taper hole on the piston, both centre distance was H=0.5～1.2mm.
In the said structure, the last taper hole of ball-and-socket passes through the tip angle of the cone of circle and centre of sphere formation, relative piston medial axis angle theta=20～30 ° mutually with connecting rod top spherical crown in the piston.The interior ball-and-socket stage casing spherical pore radius R w of piston is greater than spherical crown radius R g, Rw=1.05～1.3Rg.
The utility model compared with prior art has following good effect:
1, the last taper hole of the spherical crown of connecting rod and piston cooperate be straight line with curved surface between contact, this line contacting point has the angle of wedge, the lubricant oil that enters from balance oil hole easily forms wedge-shaped oil film at this, wedge-shaped oil film directly improves the lubricating condition of spherical hinge structure, and the spherical hinge structure motion is because of oil starvation generation sintering accident when effectively avoiding heavy duty;
2, the uncovered structure of ball-and-socket is than full subsumption architecture rapid heat dissipation in the piston, and under the wedge-shaped oil film condition, spherical hinge structure motion heating value is few;
3, the spherical inner hole of the epicone boring ratio prior art of piston easily shapes, and need not grinding process.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the prior art structural representation.
Embodiment
Below with reference to the accompanying drawings shown in and in conjunction with the embodiments, the utility model is described in further detail.
Line contact type spherical hinge kinematic pair shown in the accompanying drawing 1, it comprises connecting rod 1, piston 2 and cylinder body 3.Described connecting rod 1 top is provided with the spherical crown that radius is Rg, and this spherical crown touches with piston 2 endosphere socket and spigot joints and cooperates, the balance oil hole 2.4 of ball-and-socket in the middle part on piston 2 tops is provided with and connects.The interior ball-and-socket of described piston 2 is an irregularly-shaped hole, and the last taper hole 2.1 and the connecting rod 1 top spherical crown that are in the upper end are tangent, angle theta=20～30 of the relative piston of tangent point 2 medial axis °.Spherical pore 2.2 radiuses that are in the stage casing are Rw, Rw=1.05～1.3Rg.The bottom is a lower cone hole 2.3, and lower cone hole 2.3 upper ends are tangent at the equal place, spherical crown center of connecting rod 1 with spherical pore 2.2.When the spherical crown of described connecting rod 1 cooperated with taper hole 2.1 on the piston 2, both centre distance was H=0.5～1.2mm.Present embodiment is that single flow is the piston 2 of 12.6L/r radial plunger type motor and the line contact type spherical hinge kinematic pair of connecting rod 1.Connecting rod 1 top spherical crown radius R g=35mm wherein, the spherical pore 2.2 radius R w=37mm in the piston 2 in the ball-and-socket, Rw=1.06Rr.When the spherical crown of connecting rod 1 cooperates with taper hole 2.1 on the piston 2, both centre distance H=0.8mm.The last taper hole 2.1 of connecting rod 1 top spherical crown and piston 2 is tangent, angle theta=20 of the relative piston of tangent point 2 medial axis °.Under said structure and definite value parameter, the last taper hole 2.1 of the spherical crown of connecting rod 1 and piston 2 cooperates be straight line with curved surface between contact, this line contacting point has the angle of wedge, the lubricant oil that enters from balance oil hole 2.4 easily forms wedge-shaped oil film at this, wedge-shaped oil film directly improves the lubricating condition of spherical hinge structure, and the spherical hinge structure motion is because of oil starvation generation sintering accident when effectively avoiding heavy duty.In addition, ball-and-socket adopts uncovered structure in the utility model piston 2, than the full subsumption architecture rapid heat dissipation of prior art shown in Figure 2, can not produce superheating phenomenon.Spherical hinge structure has good lubricating condition, rotates flexible, few, the long service life of heating value under fully loaded transportation condition.
Claims (3)
1, a kind of line contact type spherical hinge kinematic pair, it comprises connecting rod (1), piston (2) and cylinder body (3); Described connecting rod (1) top is provided with the spherical crown that radius is Rg, and this spherical crown touches with piston (2) endosphere socket and spigot joint and cooperates, the balance oil hole (2.4) of ball-and-socket in piston (2) end face middle part is provided with and connects; It is characterized in that: the interior ball-and-socket of described piston (2) is an irregularly-shaped hole, the last taper hole (2.1) that is in the upper end is tangent with connecting rod (1) top spherical crown, spherical pore (2.2) radius that is in the stage casing is Rw, the bottom is lower cone hole (2.3), and lower cone hole (2.3) upper end is tangent at the equal place, spherical crown center of connecting rod (1) with spherical pore (2.2); The spherical crown of described connecting rod (1) is gone up taper hole (2.1) when cooperating with piston (2), and both centre distance is H=0.5～1.2mm.
2, line contact type spherical hinge kinematic pair according to claim 1, it is characterized in that: the last taper hole (2.1) of the interior ball-and-socket of described piston (2), pass through the cone tip angle that circle and the centre of sphere form mutually with connecting rod (1) top spherical crown, relatively angle theta=20～30 of piston (2) medial axis °.
3, line contact type spherical hinge kinematic pair according to claim 1 is characterized in that: interior ball-and-socket stage casing spherical pore (2.2) the radius R w of described piston (2) is greater than spherical crown radius R g, Rw=1.05～1.3Rg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920035642U CN201373097Y (en) | 2009-03-16 | 2009-03-16 | Line-contact spherical hinge kinematic pair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920035642U CN201373097Y (en) | 2009-03-16 | 2009-03-16 | Line-contact spherical hinge kinematic pair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201373097Y true CN201373097Y (en) | 2009-12-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920035642U Expired - Lifetime CN201373097Y (en) | 2009-03-16 | 2009-03-16 | Line-contact spherical hinge kinematic pair |
Country Status (1)
| Country | Link |
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| CN (1) | CN201373097Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112145541A (en) * | 2019-06-28 | 2020-12-29 | 伊希欧1控股有限公司 | Connecting rod for an internal combustion engine with variable compression and method for producing a connecting rod |
-
2009
- 2009-03-16 CN CN200920035642U patent/CN201373097Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112145541A (en) * | 2019-06-28 | 2020-12-29 | 伊希欧1控股有限公司 | Connecting rod for an internal combustion engine with variable compression and method for producing a connecting rod |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20091230 Effective date of abandoning: 20090316 |