CN215293222U - Adjusting connecting rod assembly and variable compression ratio mechanism - Google Patents

Abstract

The utility model provides an adjusting connecting rod assembly and a variable compression ratio mechanism, the adjusting connecting rod assembly of the utility model is arranged on the connecting rod shaft neck of a crankshaft, the connecting rod journal is provided with a communicating oil duct which radially penetrates through and is connected with the main oil duct in the crankshaft, the adjusting connecting rod assembly comprises an adjusting connecting rod of which the middle part is provided with a crankshaft mounting hole, and a bearing bush fixedly arranged in the crankshaft mounting hole, wherein connecting rod connecting holes are respectively formed at two ends of the adjusting connecting rod, an oil communicating groove is arranged on the inner wall of the bearing bush, and lubricating oil channels communicated with the connecting holes of the connecting rods are formed in the adjusting connecting rods, and the lubricating oil channel is communicated with the communicating oil groove through a communicating hole arranged on the bearing bush, and at least one end of the communicating oil channel is communicated with the communicating oil groove along with the rotation of the connecting rod journal relative to the adjusting connecting rod. The utility model discloses an adjust link assembly and can realize the fuel feeding that lasts, and can improve lubricated effect.

Description

Adjusting connecting rod assembly and variable compression ratio mechanism

Technical Field

The utility model relates to a variable compression ratio engine technical field, in particular to adjust connecting rod lubricating structure, simultaneously, the utility model also relates to a variable compression ratio mechanism with this regulation link assembly.

Background

The engine faces different working conditions when working, if the same compression ratio is adopted under various working conditions, the defects of low fuel efficiency, poor economy and high emission are inevitably caused, and the variable compression ratio technology is developed to overcome the defects of a single compression ratio. Among various types of variable compression ratio mechanisms, a multi-link variable compression ratio mechanism, which employs an eccentric shaft and a multi-link mechanism to cooperate with each other so as to be driven by the multi-link mechanism when the eccentric shaft is driven to rotate, thereby realizing the change of the top dead center of an engine piston, has become the research and development direction of many vehicle enterprises.

In the multi-link type variable compression ratio mechanism, the links are generally rotatably connected by the link pins, and the conventional multi-link structure generally employs a splash lubrication or pressure lubrication method to lubricate the rotatably connected portions of the links. The existing splash lubrication mode has the problem of unstable oil supply amount, the dry grinding condition of components is easy to occur, the existing pressure lubrication mode adopts intermittent pressure oil supply, a continuous pressure oil film cannot be formed, and the lubrication effect is poor.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention is directed to a regulating link assembly to continuously supply oil and improve the lubrication effect.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

an adjusting connecting rod assembly is arranged on a connecting rod journal of a crankshaft, a communicating oil duct which radially penetrates through the connecting rod journal and is connected with a main oil duct in the crankshaft is arranged on the connecting rod journal, the adjusting connecting rod assembly comprises an adjusting connecting rod and a bearing bush, the middle of the adjusting connecting rod is provided with a crankshaft mounting hole, the bearing bush is fixedly arranged in the crankshaft mounting hole, connecting rod connecting holes are respectively formed in two ends of the adjusting connecting rod, a communicating oil groove is formed in the inner wall of the bearing bush, a lubricating oil channel is formed in the adjusting connecting rod and is respectively communicated with the connecting rod connecting holes, the lubricating oil channel is communicated with the communicating oil groove through a communicating hole formed in the bearing bush, and at least one end of the communicating oil channel is communicated with the communicating oil groove along with the rotation of the connecting rod journal relative to the adjusting connecting rod.

Furthermore, the adjusting connecting rod is provided with an upper connecting rod and a lower connecting rod which are buckled and connected to form the crankshaft mounting hole, the connecting rod connecting holes are formed in the upper connecting rod and the lower connecting rod respectively, the lubricating oil channel comprises a first lubricating oil channel and a second lubricating oil channel which are respectively located in the upper connecting rod and the lower connecting rod, and the communicating holes are respectively connected with the first lubricating oil channel and the second lubricating oil channel.

Furthermore, the bearing bush is provided with an upper bearing bush and a lower bearing bush which are buckled and connected, the upper bearing bush is attached to the upper connecting rod, the lower bearing bush is attached to the lower connecting rod, the communicating oil groove is formed in the lower bearing bush and penetrates to the two ends of the lower bearing bush along the circumferential direction of the lower bearing bush, and the communicating oil groove and the communicating holes are located in the lower bearing bush.

Furthermore, first lubricated oil duct is through locating connecting oil groove and one of them on the axle bush outer wall the intercommunicating pore intercommunication, just connecting the oil groove including locating lower connecting oil groove on the lower bearing bush outer wall, and locating last connecting oil groove on the upper bearing bush outer wall, go up connecting the oil groove with first lubricated oil duct intercommunication.

Further, first lubricating oil duct is including being located along on the bent axle mounting hole inner wall bent axle mounting hole axial arrangement's horizontal oil duct, and the intercommunication the horizontal oil duct with on the upper portion connecting rod the upper connecting rod oil duct of connecting rod connecting hole, just the horizontal oil duct with go up the connecting oil groove and communicate.

Furthermore, the first lubricating oil channel comprises a connecting rod oil groove arranged on the inner wall of the crankshaft mounting hole and an upper connecting rod oil channel arranged in the upper connecting rod and connected with one end of the connecting rod oil groove, the upper connecting rod oil channel is communicated to the connecting rod connecting hole arranged on the upper connecting rod, and the connecting rod oil groove is connected with one communicating hole.

Further, the connecting rod oil groove extends from the lower connecting rod to the upper connecting rod and is connected with the upper connecting rod oil passage.

Further, the connecting rod oil groove is located the axial middle part of mounting hole, just go up the connecting rod oil duct through locating edge on the mounting hole inner wall the horizontal oil duct that the mounting hole axial was arranged with the connecting rod oil groove links to each other.

Further, the second lubricating oil channel comprises a lower connecting rod oil channel arranged in the lower connecting rod, one end of the lower connecting rod oil channel is connected with the other communicating hole, and the other end of the lower connecting rod oil channel is communicated into the connecting rod connecting hole on the lower connecting rod.

Compared with the prior art, the utility model discloses following advantage has:

the utility model discloses an adjusting link assembly, through the lubricating oil duct that links to each other with the connecting rod connecting hole in the adjusting link to and the setting of intercommunication oil groove on the axle bush inner wall, especially when the connecting rod axle journal rotates for adjusting link, make the intercommunication oil duct keep at least one end and communicate the oil groove to be linked together, can last the fuel feeding to adjusting link lubricating oil duct through the main oil duct from this, so as to rotate at the connecting rod and connect the position and form continuous pressure oil film, and can improve lubricated effect, ensure variable compression ratio mechanism's normal work.

Another object of the utility model is to provide a variable compression ratio mechanism, including piston, bent axle and eccentric shaft, still locate including rotating the connecting rod epaxial footpath of bent axle as above regulation link assembly, and rotate connect in piston and one end execution connecting rod between the connecting rod connecting hole, and rotate and connect in the other end the connecting rod connecting hole with drive connecting rod between the eccentric shaft, the connecting rod round pin in the connecting rod connecting hole, be equipped with connecting rod round pin lubrication oil duct in the connecting rod round pin to and the lightening hole that the axial runs through and the perforating hole that radially runs through, just the perforating hole with the lightening hole crosses and sets up, and in the downthehole cartridge of perforating hole is fixed with oil pipe, because of oil pipe's setting, and in form in the perforating hole the connecting rod round pin lubrication oil duct.

Variable compression ratio mechanism can realize can improving lubricated effect to the continuous oil supply of connecting rod connecting hole position, and have fine practicality.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural view of a variable compression ratio mechanism according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of an adjusting link according to a first embodiment of the present invention;

fig. 3 is a schematic structural diagram of a bearing bush according to a first embodiment of the present invention;

fig. 4 is a schematic view illustrating the communication between the communication oil groove and the communication oil passage according to the first embodiment of the present invention;

fig. 5 is a schematic view illustrating the communication between the communication oil groove and the communication oil passage in another state according to the first embodiment of the present invention;

fig. 6 is a schematic view illustrating the communication between the oil groove and the first lubricating oil passage according to the first embodiment of the present invention;

fig. 7 is a schematic view of the position of the upper connecting oil groove according to the first embodiment of the present invention;

fig. 8 is a schematic structural view of a second lubrication oil passage according to a first embodiment of the present invention;

fig. 9 is a schematic structural view of an upper link pin according to a first embodiment of the present invention;

fig. 10 is a schematic structural view of another form of the upper link pin according to the first embodiment of the present invention;

fig. 11 is a schematic structural view of a variable compression ratio mechanism according to a second embodiment of the present invention;

fig. 12 is a schematic structural view of an adjusting link according to a second embodiment of the present invention;

fig. 13 is a schematic structural view of a first lubricating oil duct according to a second embodiment of the present invention;

fig. 14 is a schematic position diagram of a cross oil gallery according to a second embodiment of the present invention;

fig. 15 is a schematic structural view of a second lubricating oil duct according to a second embodiment of the present invention;

description of reference numerals:

1. a piston; 2. a connecting rod journal; 3. an execution connecting rod; 4. adjusting the connecting rod; 5. a drive link; 6. an eccentric shaft; 7. an upper link pin; 8. a lower link pin; 9. an upper bearing bush; 10. a lower bearing bush; 11. a bushing;

201. a main oil gallery; 202. the oil duct is communicated;

41. an upper link; 411. an upper connecting rod connecting hole; 412. a cross oil passage; 413. an upper connecting rod oil passage; 414. an upper connecting rod oil groove;

42. a lower connecting rod; 421. a lower connecting rod connecting hole; 422. a lower connecting rod oil passage; 423. a lower connecting rod oil groove;

701. a connecting rod pin lubrication oil passage; 702. lightening holes; 703. a through hole; 7031. an end bore section; 704. an oil pipe; 7041. an end section;

901. the upper part is connected with an oil groove;

1001. the oil groove is communicated; 1002. a second communication hole; 1003. a second communication hole; 1004. the lower part is connected with an oil groove.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same item, but are instead intended to cover the same item.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example one

While the present embodiment relates to an adjusting link assembly, it also relates to a variable compression ratio mechanism having the adjusting link assembly, wherein, for the sake of understanding of the adjusting link assembly of the present embodiment, it is necessary to explain the variable compression ratio mechanism of the present embodiment before describing the adjusting link assembly. It should be noted that the adjusting link assembly of the present embodiment may be applied to other types of variable compression ratio mechanisms that satisfy the setting conditions thereof, as well as to the variable compression ratio mechanism described below.

For the variable compression ratio mechanism of the present embodiment, it is a multi-link variable compression ratio mechanism that uses the eccentric shaft 6 to cooperate with a multi-link mechanism so as to be driven by the multi-link mechanism when driving the eccentric shaft 6 to rotate, thereby realizing the variation of the top dead center of the piston 1. At this time, as shown in fig. 1, the multi-link type variable compression ratio mechanism of the present embodiment is constructed to include a piston 1, an actuating link 3 having one end hinge-connected to the piston 1, a driving link 5 having one end rotatably connected to an eccentric on an eccentric shaft 6, and an adjusting link 4 rotatably provided on a crankshaft and having both ends rotatably connected to the actuating link 3 and the driving link 5, respectively.

The adjusting connecting rod 4 is rotatably mounted on a connecting rod journal 2 of the crankshaft, and the actuating connecting rod 3 and the adjusting connecting rod 4 of the driving connecting rod 5 are rotatably connected through an upper connecting rod pin 7 and a lower connecting rod pin 8 respectively. And the two end parts of each connecting rod pin are in interference fit with the adjusting connecting rod 4, and the middle part of each connecting rod pin is in clearance fit with the actuating connecting rod 3 or the driving connecting rod 5, so that the actuating connecting rod 3 is in rotating connection with the driving connecting rod 5 and the adjusting connecting rod 4.

The eccentric shaft 6 is generally driven by a motor, and a harmonic reducer is arranged between the eccentric shaft and the motor, while the variable compression ratio mechanism of the embodiment is in operation, the engine ECU sends a control command to the motor according to the current engine load, and the motor rotates to drive the eccentric shaft 6 to rotate through the reducer. The rotation of the eccentric shaft 6 is transmitted through the driving connecting rod 5, the adjusting connecting rod 4 and the executing connecting rod 3, so that the top dead center of the piston 1 is changed, thereby realizing the adjustment of the compression ratio of the engine.

Based on the above description of the variable compression ratio mechanism, in this embodiment, a communicating oil duct that radially penetrates through and is connected to a main oil duct in the crankshaft is provided on the connecting rod journal, and in terms of the overall design of the adjusting link assembly, the adjusting link assembly includes an adjusting connecting rod 4 having a crankshaft mounting hole formed in the middle thereof, and a bearing bush fixedly mounted in the crankshaft mounting hole, and at the same time, connecting rod connecting holes are respectively formed at both ends of the adjusting connecting rod 4, a communicating oil groove 1001 is provided on the inner wall of the bearing bush, and a lubricating oil duct respectively communicated to each connecting rod connecting hole is formed in the adjusting connecting rod 4.

The lubricating oil passage is communicated with the communicating oil groove 1001 through a communicating hole formed in the bearing shell, and the communicating oil passage 202 can keep at least one end communicated with the communicating oil groove 1001 along with the rotation of the connecting rod journal 2 relative to the adjusting connecting rod 4. At this time, when the connecting rod journal rotates relative to the adjusting connecting rod, at least one end of the communicating oil passage 202 is kept to be communicated with the communicating oil groove 1001, so that oil can be continuously supplied to the adjusting connecting rod lubricating oil passage through the main oil passage, a continuous pressure oil film can be formed at the connecting rod rotation connection portion, the lubricating effect can be improved, and the normal operation of the variable compression ratio mechanism can be ensured.

Specifically, as described above with reference to fig. 2, the adjusting link assembly of the present embodiment includes the adjusting link 4, the crankshaft mounting hole is formed in the middle of the adjusting link 4, and the link coupling holes are formed in both ends of the adjusting link 4. The connecting rod journal 2 of the crankshaft is rotatably arranged in the crankshaft mounting hole, and an upper connecting rod pin 7 and a lower connecting rod pin 8 which form the connection of the actuating connecting rod 3 and the driving connecting rod 5 are respectively arranged in the connecting rod connecting holes at two ends.

The adjusting connecting rod assembly of the present embodiment further includes a bearing bush fixedly mounted in the crankshaft mounting hole of the adjusting connecting rod 4, the bearing bush has an upper bearing bush 9 and a lower bearing bush 10 which are connected in a snap-fit manner, and a communicating oil groove 1001 having a circumferential angle of 180 ° is provided on an inner wall of the lower bearing bush 10. Further, the present embodiment also has a lubricating oil passage formed in the adjusting link 4 to be communicated with each link connecting hole, respectively, and the lubricating oil passage is communicated with the communicating oil groove 1001 through a communicating hole formed in the lower bearing shell 10.

Specifically, the communicating oil groove 1001 in the above bearing bush is used for communicating with an oil passage in the crankshaft, so that the lubricating oil in the engine can be conveyed to the communicating oil groove 1001 through the crankshaft, and then enters the lubricating oil channel in the adjusting connecting rod 4 through the communicating hole, and finally enters the connecting rod connecting hole positions at two ends, so as to lubricate the rotating connecting part of the actuating connecting rod 3 and the driving connecting rod 5.

Still referring to fig. 2, the adjusting link 4 of the present embodiment has an upper link 41 and a lower link 42 that are snap-coupled to form the above-mentioned crankshaft mounting hole, and the above two link coupling holes are respectively formed in the upper link 41 and the lower link 42. At this time, for convenience of description, the two link coupling holes may be referred to as an upper link coupling hole 411 and a lower link coupling hole 421, respectively. The bearing bush is positioned in a crankshaft mounting hole, and the crankshaft mounting hole is formed by engaging and surrounding an upper mounting half hole formed in each of the upper connecting rod 41 and the lower connecting rod 42 and a lower mounting half hole corresponding to the upper mounting half hole and having a semicircular groove shape.

In addition, as shown in fig. 3, the upper bearing bush 9 and the lower bearing bush 10 of the embodiment, which are relatively engaged together, are both semicircular, the upper bearing bush 9 is located in the upper mounting half hole and is attached to the upper connecting rod 41, and the lower bearing bush 10 is located in the lower mounting half hole and is attached to the lower connecting rod 42. Meanwhile, the lubricating oil passages in the adjusting link 4 of the present embodiment also include a first lubricating oil passage and a second lubricating oil passage respectively located in the upper link 41 and the lower link 42, and the communicating holes in the lower bearing shell 10 are also two communicating holes respectively connected to the first lubricating oil passage and the second lubricating oil passage.

Here, also for convenience of description, the two communication holes are referred to as a first communication hole 1002 for communicating with the first lubricating oil passage, and a second communication hole 1002 for communicating with the above-described second lubricating oil passage, respectively. In this embodiment, the first lubricant passage in the upper connecting rod 41 is also specifically communicated with the first communicating hole 1002 through a connecting oil groove disposed on the outer wall of the bearing shell, and the connecting oil groove includes a lower connecting oil groove 1004 disposed on the outer wall of the lower bearing shell 10 and an upper connecting oil groove 901 disposed on the outer wall of the upper bearing shell 9. The upper connecting oil groove 901 and the lower connecting oil groove 1004 can be connected with the upper and lower bearing bushes in a buckling manner, the upper connecting oil groove 901 is communicated with the first lubricating oil channel, and the lower connecting oil groove 1004 is connected with the first connecting through hole 1002.

As shown in fig. 2 and combined with fig. 4, in the present embodiment, the oil path in the crankshaft specifically includes a main oil gallery 201 provided in the crankshaft and a communication oil gallery 202 located in the connecting rod journal 2, and as a preferred example, the main oil gallery 201 is located in the center of the connecting rod journal 2, and the communication oil gallery 202 and the main oil gallery 201 also meet at the center of the connecting rod journal 2 to form a connection therebetween.

In addition, the communication oil passage 202 of the present embodiment is radially provided through the connecting rod journal 2, and the communication oil groove 1001 on the lower bearing shell 10 is also arranged corresponding to the communication oil passage 202, and based on the circumferential angle of the communication oil groove being 180 °, and as shown in fig. 5, when the connecting rod journal 2 rotates together with the crankshaft relative to the adjusting connecting rod 4, i.e., relative to the bearing shell in the crankshaft mounting hole, at least one end of the communication oil passage 202 can communicate with the communication oil groove. Therefore, at any time, the communication oil passage 202 can be connected with the communication oil groove 1001 in the bearing bush, and the purpose of continuously feeding oil into the communication oil groove 1001 through the crankshaft is achieved.

As shown in fig. 6, as an exemplary structure, the first lubricating oil passage in the upper connecting rod 41 of the present embodiment specifically includes a cross oil passage 412 disposed axially along the crankshaft mounting hole on the inner wall of the upper mounting half hole, and an upper connecting rod oil passage 413 that communicates the cross oil passage 412 with the connecting rod connecting hole in the upper connecting rod 41, and the cross oil passage 412 communicates with the upper connecting oil groove 901.

It should be noted that in the specific implementation, as shown in fig. 7, the upper connecting oil groove 901 on the outer wall of the upper bearing shell 9 of the present embodiment is arranged, and it should be located outside the main bearing area of the upper bearing shell 9 to avoid affecting the structural strength of the upper bearing shell 9. Similarly, the cross oil passage 412 in the first oil passage located in the upper link 41 is located outside the main bearing area of the upper link 41, and thus avoids affecting the structural strength of the upper link 41.

The communication between the first oil passage and the communicating oil groove 1001 in the bearing shell is as shown in fig. 6, and at this time, the communicating oil passage 202, the communicating oil groove 1001, the first communication hole 1002, the connecting oil groove, and the cross oil passage 412 and the upper link oil passage 413 constitute an oil flow path for supplying oil from the main oil passage 201 in the crankshaft to the rotation connecting portion of the actuator link 3 for pressure lubrication.

As shown in fig. 8, the second lubricating oil passage of the present embodiment specifically includes a lower link oil passage 422 provided in the lower link 42, and one end of the lower link oil passage 422 is connected to the second communication hole 1003, and the other end thereof is communicated to a lower link connection hole 421 provided in the lower link 42, so as to be used for pressure lubrication of the rotationally connected portion of the drive link 5.

In this way, the communication oil passage 202, the communication oil groove 1001, the second communication hole 1003, and the lower link oil passage 422 constitute a lubricant oil flow path for supplying oil from the main oil passage 201 of the crankshaft to the rotation connection portion of the drive link 5 for pressure lubrication.

In the present embodiment, since each link connecting hole of the adjusting link 4 is formed on the link arm of the upper link 41 and the lower link 42, referring to fig. 6 again, the first lubricating oil passage and the second lubricating oil passage in the adjusting link 4 are specifically end portions that are communicated with the corresponding link connecting holes, taking the link pin 7 as an example. At this time, a link pin lubricating oil passage 701 having one end connected to the first lubricating oil passage or the second lubricating oil passage is provided on the upper link pin 7 and the lower link pin 8, and the other end of the link pin lubricating oil passage 701 penetrates outside the link pin at the middle in the axial direction of the link pin, so that the lubricating oil can finally enter the rotation connection portion of the actuating link 3 or the driving link 5 in clearance fit.

In order to prolong the service life of the mechanism, in practical implementation, a bush 11 is generally arranged at the connecting part of the actuating link 3 and the driving link 5 with the adjusting link 4, and lubricating oil sprayed out through the link pin lubricating oil channel 701 forms an oil film between the link pin and the bush 11 so as to achieve a lubricating effect.

It should be noted that each link pin of the present embodiment may have a structure like the upper link pin 7 shown in fig. 6, and the upper link pin 7 has a solid structure. Alternatively, as a modification, this embodiment may be provided with a lightening hole 702 penetrating in the axial direction and a through hole 703 penetrating in the radial direction on the link pin, as shown in fig. 9 and 10, also taking the link pin 7 as an example. One end of the through hole 703 is opened at the end of the link pin, and the other end is opened at the middle part of the link pin in the axial direction, and it is also disposed to intersect with the lightening hole 702, and an oil pipe 704 is also inserted and fixed in the through hole 703.

The link pin lubricating oil passage 701 is formed in the through hole 703 by the arrangement of the oil pipe 704 in the through hole. In addition, the connecting rod pin structure with the lightening holes 702 and the through holes 703 can greatly reduce the mass of the connecting rod pin structure, thereby having good lightening effect.

In addition, as still shown in fig. 9, as an exemplary structure, openings at both ends of the through-hole 703 may be designed in a stepped shape such that the through-hole 703 has a middle hole section in the middle and end hole sections 7031 having an inner diameter larger than that of the middle hole section are provided at both ends. Meanwhile, after the oil pipe 704 is inserted into the through hole 703 in a clearance fit state, both ends of the oil pipe 704 are machined so as to be radially expanded and closely fit to both ends of the through hole 703, so that end pipe segments 7041 which are in interference fit with the inner walls of the end hole segments 7031 are respectively formed at both ends of the oil pipe 704.

Thus, by interference fit of the end pipe segment 7041 and the end hole segment 7031 at both ends, not only sealing between the oil pipe 704 and the through hole 703 but also positioning of the oil pipe 704 in the through hole 703 can be achieved.

As another exemplary structure, referring to fig. 10 again, in this embodiment, after the cross-sectional apertures of the through hole 703 are the same, and the oil pipe 704 is inserted into the through hole 703 in a clearance fit state, pressure is applied to both ends of the oil pipe 704, or high-pressure liquid is introduced. This not only allows oil pipe 704 to be tightly attached to the inner wall of through-hole 703, but also allows oil pipe 704 to be positioned in lightening hole 702, i.e., to bulge outward at the position indicated by reference numeral G in fig. 10, thereby also achieving sealing between oil pipe 704 and through-hole 703 and positioning of oil pipe 704 in through-hole 703.

The adjusting connecting rod assembly and the corresponding variable compression ratio mechanism of the embodiment can realize continuous oil supply to the positions of the connecting rod connecting holes through the lubricating oil channel connected with the connecting rod connecting holes in the adjusting connecting rod 4 and the matching of the communicating oil channel 202 in the communicating oil groove 1001 and the crankshaft, can improve the lubricating effect and have good practicability.

Example two

The present embodiment relates to an adjusting link assembly having substantially the same structure as the adjusting link assembly of the first embodiment, except that, as shown in fig. 11 to 15, the first lubricating oil passage on the upper connecting rod 41 in the present embodiment includes a connecting rod oil groove provided on the inner wall of the crankshaft mounting hole, and an upper connecting rod oil passage 414 provided in the upper connecting rod 41 to be connected to one end of the connecting rod oil groove. The connecting rod oil groove is formed by extending the lower connecting rod 42 to the upper connecting rod 41 and connecting the upper connecting rod oil groove 414 and the lower connecting rod oil groove 423 which are respectively arranged on the inner walls of the upper mounting half hole and the lower mounting half hole in series.

One end of the upper link oil passage 414 is connected to the upper link oil groove 414, and the other end thereof is communicated to an upper link connection hole 411 provided in the upper link 41, for lubricating the rotation connection portion of the actuating link 3 and the adjusting link 4.

In this embodiment, the lower link oil groove 423 of the integral link oil groove is connected to the first communication hole 1002. In addition, the connecting rod oil groove formed by the upper connecting rod oil groove 414 and the lower connecting rod oil groove 423 according to the present embodiment is also located in the middle of the crankshaft mounting hole in the axial direction, and the upper connecting rod oil passage 414 is connected to the upper connecting rod oil groove 414 through a cross oil passage 412 provided on the inner wall of the upper mounting half hole and arranged in the axial direction of the mounting hole.

Thus, the communication oil passage 202, the communication oil groove 1001, the first communication hole 1002, the link oil groove, and the cross oil passage 412 and the upper link oil passage 414 constitute a lubricant oil flow path for supplying oil from the main oil passage 201 in the crankshaft to the rotation connection portion of the actuator link 3 for pressure lubrication. It should be noted that in the implementation, the cross oil passage 412 in the upper link 41 is arranged to be located outside the main bearing area of the upper link 41 to avoid affecting the structural strength of the upper link 41.

In this embodiment, the second lubricating oil passage on the lower link 42 also includes a lower link oil passage 422 disposed in the lower link 42, and one end of the lower link oil passage 422 is also connected to the second communicating hole 1003, and the other end thereof is also communicated to a lower link connecting hole 421 on the lower link 4, so as to be used for pressure lubrication of the rotary connecting portion of the driving link 5.

At this time, the communication oil passage 202, the communication oil groove 1001, the second communication hole 1003, and the lower link oil passage 422 constitute a lubricant oil flow path for supplying oil from the main oil passage 201 of the crankshaft to a rotation connection portion of the drive link 5 for pressure lubrication.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides an adjust link assembly, locates on the connecting rod journal of bent axle, its characterized in that: the adjusting connecting rod assembly comprises an adjusting connecting rod (4) and a bearing bush, wherein a crankshaft mounting hole is formed in the middle of the adjusting connecting rod (4), the bearing bush is fixedly arranged in the crankshaft mounting hole, connecting rod connecting holes are formed in two ends of the adjusting connecting rod (4), a communicating oil groove (1001) is formed in the inner wall of the bearing bush, a lubricating oil channel is formed in the adjusting connecting rod (4) and communicated to each connecting rod connecting hole, the lubricating oil channel is communicated with the communicating oil groove (1001) through a communicating hole formed in the bearing bush, and the communicating oil channel (202) keeps at least one end communicated with the communicating oil groove (1001) along with the rotation of the connecting rod journal (2) relative to the adjusting connecting rod (4).

2. The adjusting link assembly of claim 1, wherein: adjusting connecting rod (4) and having the lock and link to each other and form upper portion connecting rod (41) and lower part connecting rod (42) of crankshaft mounting hole, two the connecting rod connecting hole is located upper portion connecting rod (41) with on lower part connecting rod (42), lubricated oil duct is including being located respectively upper portion connecting rod (41) with first lubricated oil duct and the lubricated oil duct of second in lower part connecting rod (42), the intercommunicating pore be respectively with first lubricated oil duct with two that the lubricated oil duct of second links to each other.

3. The adjusting link assembly of claim 2, wherein: the bearing bush is provided with an upper bearing bush (9) and a lower bearing bush (10) which are connected in a buckled mode, the upper bearing bush (9) is attached to the upper connecting rod (41), the lower bearing bush (10) is attached to the lower connecting rod (42), the communicating oil groove (1001) is formed in the lower bearing bush (10) and penetrates through the two ends of the lower bearing bush (10) along the circumferential direction of the lower bearing bush (10), and the communicating oil groove (1001) and the communicating holes are located in the lower bearing bush (10).

4. The adjusting link assembly of claim 3, wherein: the first lubricating oil channel is communicated with one of the communicating holes through a connecting oil groove arranged on the outer wall of the bearing bush, the connecting oil groove comprises a lower connecting oil groove (1004) arranged on the outer wall of the lower bearing bush (10) and an upper connecting oil groove (901) arranged on the outer wall of the upper bearing bush (9), and the upper connecting oil groove (901) is communicated with the first lubricating oil channel.

5. The adjusting link assembly of claim 4, wherein: the first lubricating oil channel comprises a transverse oil channel (412) which is located on the inner wall of the crankshaft mounting hole and is axially arranged along the crankshaft mounting hole, and an upper connecting rod oil channel (413) which is communicated with the transverse oil channel (412) and the connecting rod connecting hole in the upper connecting rod (41), and the transverse oil channel (412) is communicated with the upper connecting oil groove (901).

6. The adjusting link assembly of claim 3, wherein: the first lubricating oil channel comprises a connecting rod oil groove arranged on the inner wall of the crankshaft mounting hole and an upper connecting rod oil channel (413) arranged in the upper connecting rod (41) and connected with one end of the connecting rod oil groove, the upper connecting rod oil channel (413) is communicated to a connecting rod connecting hole formed in the upper connecting rod (41), and the connecting rod oil groove is connected with one communicating hole.

7. The adjusting link assembly of claim 6, wherein: the link oil groove extends from the lower link (42) to the upper link (41) to be connected to the upper link oil passage (413).

8. The adjusting link assembly of claim 6, wherein: the connecting rod oil groove is located the axial middle part of mounting hole, just go up connecting rod oil duct (413) through locating follow on the mounting hole inner wall the horizontal oil duct (412) that the mounting hole axial was arranged with the connecting rod oil groove links to each other.

9. The adjusting link assembly according to any one of claims 2 to 8, wherein: the second lubricating oil channel comprises a lower connecting rod oil channel (422) arranged in the lower connecting rod (42), one end of the lower connecting rod oil channel (422) is connected with the other communication hole, and the other end of the lower connecting rod oil channel is communicated to the connecting rod connecting hole on the lower connecting rod (42).

10. A variable compression ratio mechanism comprising a piston (1), a crankshaft and an eccentric shaft (6), characterized in that: further comprising a regulating connecting-rod assembly according to any one of claims 1 to 9 rotatably mounted on a connecting-rod journal (2) of the crankshaft, and an actuating connecting rod (3) rotatably connected between the piston (1) and the connecting rod connecting hole at one end, and a driving connecting rod (5) rotatably connected between the connecting rod connecting hole at the other end and the eccentric shaft (6), a connecting rod pin is arranged in the connecting rod connecting hole, a connecting rod pin lubricating oil channel (701) is arranged in the connecting rod pin, and a lightening hole (702) which axially penetrates and a through hole (703) which radially penetrates, wherein the through hole (703) is intersected with the lightening hole (702), an oil pipe (704) is inserted and fixed in the through hole (703), and due to the arrangement of the oil pipe (704), and the link pin lubricating oil passage (701) is formed in the through hole (703).

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