CN216446987U - Diesel engine valve transmission device - Google Patents
Diesel engine valve transmission device Download PDFInfo
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- CN216446987U CN216446987U CN202123327248.3U CN202123327248U CN216446987U CN 216446987 U CN216446987 U CN 216446987U CN 202123327248 U CN202123327248 U CN 202123327248U CN 216446987 U CN216446987 U CN 216446987U
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- rocker
- shaft seat
- rocker arm
- shaft
- positioning
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Abstract
A valve transmission device of a diesel engine is arranged on a cylinder cover of the diesel engine and comprises a rocker shaft, a first rocker shaft seat, a second rocker shaft seat, a first rocker part, a second rocker part and a positioning spacer bush, wherein the rocker shaft sequentially passes through rocker shaft mounting holes of the first rocker shaft seat, the first rocker part, the positioning spacer bush, the second rocker part and the second rocker shaft seat, all the parts are connected into a whole, two side surfaces of the first rocker part are respectively attached to the end surfaces of the first rocker shaft seat and the positioning spacer bush, two side surfaces of the second rocker part are respectively attached to the end surfaces of the positioning spacer bush and the second rocker shaft seat, positioning pins for positioning are respectively arranged on the first rocker shaft seat and the second rocker shaft seat, and the first rocker shaft seat, the second rocker shaft seat and the rocker shaft are fixed on the cylinder cover through locking connecting pieces. The device has the advantages of simple structure, accurate positioning, light weight, good lubricating condition and strong bearing and deformation resistance.
Description
Technical Field
The utility model relates to the technical field of internal combustion engines, in particular to a diesel engine valve transmission device.
Background
The valve driving assembly and its fixer are important parts of valve driving system in valve mechanism, and the rocker arm transfers the force and motion converting direction and position from the push rod to the end of the valve rod to drive the valve to open. The traditional agricultural diesel engine valve actuating mechanism mostly adopts a middle camshaft, and a rocker arm is driven by a tappet and a push rod, so that one air inlet valve and one air outlet valve of each air cylinder are driven to work, and the manufacturing cost is low.
In recent years, with the stricter environmental regulations, a four-valve structure which is more energy-saving and environment-friendly and has two rows of intake and exhaust in each cylinder is used, and the four-valve structure is basically a standard configuration for meeting the emission regulations of four or more in non-road countries. At present, most of agricultural four-valve diesel engines still use the camshaft position of the original two-valve type, and realize the function conversion from the single rocker arm driving single valve to the single rocker arm driving double valve synchronous operation by changing the valve rocker arm structure and adding the bridge arm crossing the end parts of two identical valve rods. However, two adjacent rocker arms are usually elastically separated by using elements such as springs and the like, axial movement exists, the action point of the rocker arm on the bridge arm cannot be accurately located at the symmetrical center of the bridge arm, and the rocker arm is easy to bias the bridge arm during working, so that the bridge arm is laterally turned, even the valve is broken, and serious faults such as valve beating, piston damage and the like occur. In addition, the increase of the number of the valves increases the inertia of the moving part, the stress of the rocker shaft and the support, the lubrication condition is degraded, and higher requirements are provided for the rigidity and the strength of the rocker shaft fixing device and the high efficiency and the reliability of an oil supply channel. In addition, in recent years, the demands of paddy field type tractor users for improving power density and reducing weight are continuously increased, and the light weight design of a matched diesel engine is imperative.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems, the utility model provides a diesel engine valve transmission device which has the advantages of simple structure, accurate positioning, light weight, good lubricating condition and strong bearing and deformation resistance.
The technical scheme adopted by the utility model is as follows: a valve transmission device of a diesel engine is arranged on a cylinder cover of the diesel engine and comprises a rocker shaft, a first rocker shaft seat, a second rocker shaft seat, a first rocker part, a second rocker part and a positioning spacer bush, wherein the rocker shaft sequentially passes through rocker shaft mounting holes of the first rocker shaft seat, the first rocker part, the positioning spacer bush, the second rocker part and the second rocker shaft seat, all the parts are connected into a whole, two side surfaces of the first rocker part are respectively attached to the end surfaces of the first rocker shaft seat and the positioning spacer bush, two side surfaces of the second rocker part are respectively attached to the end surfaces of the positioning spacer bush and the second rocker shaft seat, positioning pins for positioning are respectively arranged on the first rocker shaft seat and the second rocker shaft seat, and the first rocker shaft seat, the second rocker shaft seat and the rocker shaft are fixed on the cylinder cover through locking connecting pieces.
Preferably, the first rocker arm shaft seat and the second rocker arm shaft seat are respectively provided with a positioning hole and a bolt connecting hole, each shaft seat is positioned on the cylinder cover through a positioning pin, and each shaft seat and the rocker arm shaft are fixed on the cylinder cover through fixing bolts which sequentially penetrate through the bolt connecting holes on each shaft seat and the connecting holes on the rocker arm shaft.
Preferably, the rocker arm shaft is of a hollow structure, the central through hole of the rocker arm shaft is an axial oil distribution channel, and a fixing bolt hole and a mounting plane are respectively arranged at the mounting positions corresponding to the first rocker arm shaft seat and the second rocker arm shaft seat along the axial direction.
As a preferred scheme, a crescent lubricating oil supply groove is further formed in the position, corresponding to an oil supply hole of the second rocker shaft seat, of the rocker shaft and is communicated with the axial oil distribution channel; and lubricating oil inlet holes are respectively formed in the mounting positions corresponding to the first rocker arm part and the second rocker arm part, and the axes of the holes vertically penetrate through the axis of the rocker arm shaft and are communicated with an axial oil distribution channel of the rocker arm shaft.
Preferably, the lower half parts of the first rocker arm shaft seat and the second rocker arm shaft seat are installation bases, the installation bases are provided with positioning holes and bolt connecting holes, the upper half part is a rocker arm shaft installation hole support in a sector annular shape, and the hole central angle A = 213-223 degrees.
Preferably, the second rocker arm shaft seat is also provided with a lubricating oil hole, the axis of which inclines towards the axis direction of the rocker arm shaft and is communicated with a lubricating oil supply groove of the rocker arm shaft.
Preferably, the rocker shaft mounting holes of the first rocker arm part and the second rocker arm part are sleeved with bushings, and the inner hole wall surfaces of the bushings are provided with annular oil grooves.
Preferably, the positioning spacer is a steel annular body, and the section of the positioning spacer is C-shaped.
The utility model has the beneficial effects that:
this scheme is through the structural design of innovation, provide one kind by first rocking arm axle bed, second rocking arm axle bed, first rocking arm part, the integrated diesel engine valve gear of structure of second rocking arm part and location spacer cooperation rocking arm axle, the device runs through the rocking arm axle mounting hole of above-mentioned part and connects each part as a whole through hollow rocking arm axle, the mounted position of first rocking arm part and second rocking arm part is carried out the accurate positioning through first rocking arm axle bed of rigid location spacer cooperation and second rocking arm axle bed, each rocking arm part both sides face after the installation respectively with rocking arm axle bed terminal surface, the laminating of location spacer terminal surface, and fix through the locking bolt. The device has the following advantages; the structure is simple, the positioning is accurate, the weight is light, the lubricating condition is good, the bearing and anti-deformation capability is strong, the service life and the reliability of the diesel engine can be improved, and the adaptability is good.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention in the prior art, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a structural sectional view of a rocker arm shaft according to the present invention;
FIG. 3 is a sectional view of the structure taken along line A-A of FIG. 1;
FIG. 4 is a cross-sectional view of the structure taken along line B-B of FIG. 1;
FIG. 5 is an enlarged view of a portion of FIG. 4 at C;
FIG. 6 is a schematic cross-sectional view of a positioning spacer of the present invention.
Detailed Description
The utility model is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
It should be noted that: unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the terms "a" and "an" or "the" and similar referents in the description and claims of the present invention are not to be construed as limiting in number, but rather as indicating the presence of at least one. The word "comprise" or "comprises", and the like, indicates that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, but does not exclude other elements or items having the same function.
Examples 1,
The detailed structure of the present embodiment is described below with reference to fig. 1 to 6:
a diesel engine valve gear, the valve gear is fixedly mounted on the diesel engine cylinder cover, mainly made up of rocking arm axle 1, the first rocking arm axle bed 2, the second rocking arm axle bed 3, the first rocking arm part 4, the second rocking arm part 5, the locating spacer 6, the locating pin 7 and the fixing bolt 8, the said rocking arm axle 1 passes the first rocking arm axle bed 2, the first rocking arm part 4, the locating spacer 6, the second rocking arm part 5, the rocking arm axle mounting hole of the second rocking arm axle bed 3 sequentially, link the above-mentioned every part into an organic whole, the first rocking arm part 4 both sides are laminated with the first rocking arm axle bed 2 and end of the locating spacer 6 separately, the second rocking arm part 5 both sides are laminated with the locating spacer 6 and end of the second rocking arm axle bed 3 separately, there are locating pins 7 used for locating on the said first rocking arm axle bed 2 and second rocking arm axle bed 3 separately, and the first rocker arm shaft seat 2, the second rocker arm shaft seat 3 and the rocker arm shaft 1 are fixedly locked on the cylinder cover through a fixing bolt 8.
It should be noted that: a plurality of groups of first rocker arm parts 4, second rocker arm parts 5 and positioning spacer bushes 6 can be arranged on the rocker arm shaft 1; as shown in fig. 1, three sets of the first rocker arm part 4, the positioning spacer 6 and the second rocker arm part 5 are arranged and separated by the second rocker arm shaft base 3, and the two parts are closely attached to each other and locked by the first rocker arm shaft bases 2 at the two ends.
In the embodiment, the first rocker arm shaft seat 2 and the second rocker arm shaft seat 3 are respectively provided with a positioning hole and a bolt connecting hole, each shaft seat is accurately positioned on the cylinder cover through a positioning pin 7, the positioning spacer 6 adopts a rigid piece and is combined with a reasonable axial clearance to ensure that each rocker arm part is accurately installed, the action point of the rocker arm on the bridge arm is accurately positioned at the symmetrical center of the bridge arm, and the rocker arm does not move or block in the motion process, so that the synchronous motion of two valves with the same name in a single cylinder is ensured; and the fixing bolt 8 sequentially penetrates through the bolt connecting hole on each shaft seat and the connecting hole on the rocker arm shaft to fix each shaft seat and the rocker arm shaft on the cylinder cover, so that the rigidity and the strength of the whole device are improved, and the working is reliable.
As shown in fig. 2 and 3, the rocker arm shaft 1 is a hollow structure, and a central through hole is an axial oil distribution passage 101; along the axis direction, a fixing bolt hole and a mounting plane are arranged at the position corresponding to the mounting position of the rocker shaft seat, and a crescent lubricating oil supply groove 102 is also arranged at the position corresponding to the oil supply hole of the second rocker shaft seat 3 and is communicated with the axial oil distribution channel 101; and lubricating oil holes 103 are formed in the positions corresponding to the installation positions of the rocker arm parts, and the axes of the holes vertically penetrate through the axes of the rocker arm shafts and are communicated with the axial oil distribution channel 101 of the rocker arm shafts.
As shown in fig. 1 and 3, the lower halves of the first rocker arm shaft seat 2 and the second rocker arm shaft seat 3 are mounting bases, each mounting base is of a cuboid structure and is provided with a pin hole, a bolt hole and a cylindrical avoidance pit, and the second rocker arm shaft seat is further provided with a lubricating oil inlet hole 301, the axis of which inclines towards the axis direction of the rocker arm and is communicated with a lubricating oil supply groove 102 of the rocker arm shaft; the upper half part of the shaft seat is provided with a rocker shaft mounting hole support, the rocker shaft mounting hole support is designed into a fan-shaped circular ring structure based on a simulation analysis result, and a hole center angle A = 213-223 degrees, compared with a conventional designed complete circular ring structure, the fan-shaped circular ring rocker shaft mounting hole support is simpler in structure, the rigidity and the strength of a force bearing part are guaranteed, and the weight of components is reduced; and the central angle larger than 180 degrees is arranged, so that each shaft seat and the rocker shaft are reliably connected into an integral structure during split charging, and the rocker shaft is convenient to insert and drain oil in the inner hole of the rocker.
As shown in fig. 4 and 5, the rocker shaft mounting holes of the first rocker arm part 4 and the second rocker arm part 5 are sleeved with bushings, and the wall surfaces of the inner holes of the bushings are provided with annular oil grooves 501; the valve connecting arm and the push rod connecting arm are respectively arranged on two sides of the rocker shaft mounting hole, and the end parts of the valve connecting arm and the push rod connecting arm are respectively provided with a driving connecting piece. The arms are respectively provided with an oil hole which is respectively communicated with the annular oil groove, the rocker arm valve end hole, the annular oil groove and the rocker arm push rod end hole.
As shown in fig. 6, the positioning spacer 6 is a steel ring-shaped body with a C-shaped cross section, so that the weight of the component is reduced while ensuring the size and sufficient rigidity.
When the diesel engine works, lubricating oil enters the axial oil distribution channel 101 of the rocker shaft from the lubricating oil inlet hole 301 of the second rocker shaft seat 3 through the lubricating oil supply groove 102 on the rocker shaft 1 and then flows to the lubricating oil holes 103 which are arranged on the rocker shaft corresponding to the rocker shaft and have axes passing through the axes of the rocker shaft and perpendicular to the shaft seat mounting plane. The oil hole is a through hole, lubricating oil flowing out of the through hole flows to the contact surface of the rocker arm inner hole and the rocker arm shaft at one end to provide lubricating and bearing oil films, and flows to the annular oil groove 501 on the inner wall of the rocker arm shaft mounting hole bush at the other end to respectively flow to the tail end of the valve connecting arm and the tail end of the push rod connecting arm to lubricate the ball head friction surface of the connecting piece after being filled with the oil grooves. In the working process of the diesel engine, the motion of the rocker arm part swings and rotates up and down around the rocker arm shaft, and the oil distribution type of the oil groove and the oil hole changes the traditional intermittent oil supply into the continuous oil supply, so that the lubricating oil is sufficiently supplied to the ball head friction surfaces at two ends in the whole working process, the lubricating effect is good, and the abrasion of the contact parts is effectively reduced. The reasonable and perfect lubricating structure and the flow path ensure the good lubrication of all parts of the assembly and prolong the service life of the diesel engine.
It should be noted that while the utility model has been described in terms of the above-mentioned embodiments, other embodiments are also possible. It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model, and it is intended that all such changes and modifications be covered by the appended claims and their equivalents.
Claims (8)
1. The utility model provides a diesel engine valve gear, this valve gear installs on diesel engine cylinder head which characterized in that: the cylinder cover positioning device comprises a rocker shaft, a first rocker shaft seat, a second rocker shaft seat, a first rocker part, a second rocker part and a positioning spacer bush, wherein the rocker shaft sequentially penetrates through rocker shaft mounting holes of the first rocker shaft seat, the first rocker part, the positioning spacer bush, the second rocker part and the second rocker shaft seat, all the parts are connected into a whole, two side surfaces of the first rocker part are respectively attached to the end surfaces of the first rocker shaft seat and the positioning spacer bush, two side surfaces of the second rocker part are respectively attached to the end surfaces of the positioning spacer bush and the second rocker shaft seat, positioning pins for positioning are respectively arranged on the first rocker shaft seat and the second rocker shaft seat, and the first rocker shaft seat, the second rocker shaft seat and the rocker shaft are fixed on the cylinder cover through locking connectors.
2. A diesel valve train as claimed in claim 1, characterized in that: the first rocker arm shaft seat and the second rocker arm shaft seat are respectively provided with a positioning hole and a bolt connecting hole, each shaft seat is positioned on the cylinder cover through a positioning pin, and each shaft seat and each rocker arm shaft are fixed on the cylinder cover through fixing bolts which sequentially penetrate through the bolt connecting holes on each shaft seat and the connecting holes on the rocker arm shaft.
3. A diesel valve train as claimed in claim 1, characterized in that: the rocker arm shaft is of a hollow structure, the central through hole of the rocker arm shaft is an axial oil distribution channel, and fixing bolt holes and mounting planes are respectively arranged at the mounting positions corresponding to the first rocker arm shaft seat and the second rocker arm shaft seat along the axis direction.
4. A diesel valve gear device as claimed in claim 3, characterized in that: the rocker shaft is also provided with a crescent lubricating oil supply groove corresponding to the oil supply hole of the second rocker shaft seat and communicated with the axial oil distribution channel; and lubricating oil inlet holes are respectively formed in the mounting positions corresponding to the first rocker arm part and the second rocker arm part, and the axes of the holes vertically penetrate through the axis of the rocker arm shaft and are communicated with an axial oil distribution channel of the rocker arm shaft.
5. A diesel valve train as claimed in claim 1, characterized in that: the lower half parts of the first rocker arm shaft seat and the second rocker arm shaft seat are installation bases, positioning holes and bolt connecting holes are formed in the installation bases, the upper half parts of the first rocker arm shaft seat and the second rocker arm shaft seat are rocker arm shaft installation hole supports in sector circular rings, and the hole central angle A = 213-223 degrees.
6. A diesel valve gear unit as claimed in claim 5, characterized in that: the second rocker arm shaft seat is also provided with a lubricating oil hole, the axis of which inclines towards the axis direction of the rocker arm shaft and is communicated with a lubricating oil supply groove of the rocker arm shaft.
7. A diesel valve train as claimed in claim 1, characterized in that: the rocker shaft mounting holes of the first rocker arm part and the second rocker arm part are sleeved with bushings, and the inner hole wall surfaces of the bushings are provided with annular oil grooves.
8. A diesel valve train as claimed in claim 1, characterized in that: the positioning spacer bush is a steel annular body, and the section of the positioning spacer bush is C-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123327248.3U CN216446987U (en) | 2021-12-28 | 2021-12-28 | Diesel engine valve transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123327248.3U CN216446987U (en) | 2021-12-28 | 2021-12-28 | Diesel engine valve transmission device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216446987U true CN216446987U (en) | 2022-05-06 |
Family
ID=81378448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123327248.3U Active CN216446987U (en) | 2021-12-28 | 2021-12-28 | Diesel engine valve transmission device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216446987U (en) |
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2021
- 2021-12-28 CN CN202123327248.3U patent/CN216446987U/en active Active
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