CN212406849U

CN212406849U - Diesel engine roller tappet

Info

Publication number: CN212406849U
Application number: CN202021165187.8U
Authority: CN
Inventors: 韩乐; 季永会; 胡玮; 王志磊; 安黔君
Original assignee: Henan Diesel Engine Industry Co Ltd
Current assignee: Henan Diesel Engine Industry Co Ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2021-01-26
Anticipated expiration: 2030-06-22

Abstract

The utility model discloses a diesel engine gyro wheel tappet, including organism and bush, be provided with the tappet body in the organism, be provided with the thrust piece on the tappet body, the upper end and the push rod of thrust piece are near setting up, thrust piece and tappet body interference fit, the bush lateral surface is provided with the gyro wheel, slewing mechanism that gyro wheel and bush are constituteed is through location axle and tappet body fixed connection, location screw and tappet body fixed connection are passed through to one side of axle in location, and vertical through-hole is all adopted to first oil duct and second oil duct on this diesel engine gyro wheel tappet, and processing is simple, has practiced thrift manufacturing cost, and the rectangle location boss of location axle one end effectively prevents that the tappet body is rotatory in the course of the work, and the location is simple, uses reliably, and the location axle is positioned on the tappet body through location screw, and the location is accurate reliable, improves the accuracy nature of assembly.

Description

Diesel engine roller tappet

Technical Field

The utility model relates to an internal-combustion engine technical field specifically is a diesel engine gyro wheel tappet.

Background

The diesel engine valve transmission mechanism mainly comprises a tappet, a push rod and a rocker arm. In the working process of the diesel engine, the tappet is used for transmitting the motion of the cam to the push rod from the cam shaft, so that the opening and closing of the air inlet and outlet valve are realized, and the air distribution timing of the diesel engine is ensured.

A roller tappet (201220045223.6) comprises a tappet body, wherein the upper end of the tappet body is provided with a tappet inner cavity, the bottom end of the tappet body is provided with a roller groove, the roller groove is provided with a roller through a pin shaft and is provided with a limiting block for limiting the axial displacement of the roller, and the tappet inner cavity is provided with a side through hole and an inclined oil hole for lubricating the surface of the roller and the surface of the tappet. According to the scheme, the side through hole and the inclined oil hole are machined in the inner cavity of the tappet, machining difficulty is high, production cost is increased, the contact surface of the roller and the cam can only be lubricated, lubrication between the roller and the pin shaft cannot be guaranteed, and dry friction is easily generated to cause the roller to be blocked; the push rod is in direct contact with the surface of the inner cavity of the tappet, so that the surface of the roller tappet is easily abraded, the parts are more, the installation is complex, and the use is unreliable.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to overcome current defect, provide a diesel engine gyro wheel tappet, the device part structure is rationally distributed, and the spare part machining degree of difficulty is little, and the vice lubrication of friction is accurate good, is provided with thrust piece and push rod in the tappet and constitutes the friction pair, has avoided tappet and push rod direct contact, avoids the emergence of the dead phenomenon of gyro wheel card, can effectively solve the problem in the background art.

In order to achieve the above object, the utility model provides a following technical scheme: a roller tappet of a diesel engine comprises a machine body and a bushing, wherein a tappet body is arranged in the machine body, a thrust block is arranged on the tappet body, the upper end of the thrust block is arranged close to a push rod, the thrust block is in interference fit with the tappet body, a roller is arranged on the outer side surface of the bushing, a rotating mechanism consisting of the roller and the bushing is fixedly connected with the tappet body through a positioning shaft, and one side of the positioning shaft is fixedly connected with the tappet body through a positioning screw.

As an optimal technical scheme of the utility model, be provided with thrust piece mounting hole, location axle mounting hole, first oil duct, second oil duct, oil pocket, first set screw mounting hole and oil storage tank on the tappet body, thrust piece mounting hole, location axle mounting hole and first set screw mounting hole correspond the setting with thrust piece, location axle and set screw.

As an optimal technical scheme of the utility model, the quantity of first oil duct is two, and two first oil duct symmetries set up on the tappet body, first oil duct and second oil duct adopt vertical through-hole structure.

As an optimized technical scheme of the utility model, the top surface is the semicircle face on the thrust block, and the lower part is the cylinder.

As an optimal technical scheme of the utility model, the gyro wheel adopts cylindric hollow structure, and the edge of gyro wheel is provided with half spherical groove.

As an optimal technical scheme of the utility model, the bush adopts cylindric hollow structure, adopts wear-resisting material, and the bush middle part is provided with oilhole and third oil duct.

As an optimal technical scheme of the utility model, the location axle is cylindric structure, fixes a position epaxial oil groove and the second set screw mounting hole of having provided with, and the one end of location axle is provided with rectangle location boss.

Compared with the prior art, the beneficial effects of the utility model are that: this first oil duct and second oil duct on the diesel engine gyro wheel tappet all adopt vertical through-hole, processing is simple, and production cost is saved, simultaneously through the second oil duct, oil pocket and oil groove pair gyro wheel and bush, bush and location axle, the tappet body carries out the accuracy lubrication with the organism, improve lubricated effect, the rectangle location boss of location axle one end effectively prevents that the tappet body is rotatory in the course of the work, the location is simple, use reliably, the location axle is positioned on the tappet body through set screw, the location is accurate reliable, the accuracy nature of assembly is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a tappet body;

FIG. 3 is a cross-sectional view of FIG. 2A-A;

FIG. 4 is a cross-sectional view of FIG. 2B-B;

FIG. 5 is a schematic view of a stop block structure;

FIG. 6 is a schematic view of a roller structure;

FIG. 7 is a schematic view of a bushing configuration;

FIG. 8 is a cross-sectional view of FIG. 7A-A;

FIG. 9 is a cross-sectional view of FIG. 7B-B;

FIG. 10 is a schematic view of a positioning shaft;

FIG. 11 is a cross-sectional view of FIG. 10A-A;

FIG. 12 is a left side view of the positioning shaft;

fig. 13 is a schematic view of a positioning screw structure.

In the figure: the oil cylinder positioning device comprises a machine body 1, a tappet body 2, a thrust block 3, a roller 4, a bushing 5, a positioning shaft 6, a positioning screw 7, a thrust block mounting hole 8, a positioning shaft mounting hole 9, a first oil duct 10, a second oil duct 11, an oil chamber 12, a first positioning screw mounting hole 13, an oil storage groove 14, a push rod 15, a rectangular positioning boss 16, an oil passing groove 17, an oil hole 18, a third oil duct 19 and a second positioning screw mounting hole 20.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments (for convenience of description and understanding, the following description is made with the upper side of fig. 1 as the upper side). Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-13, the present invention provides a technical solution: a diesel engine roller tappet comprises a machine body 1 and a bushing 5, wherein the bushing 5 is used for avoiding a roller 4 from directly contacting with a positioning shaft 6 and prolonging the service life of a tappet body 2, the bushing 5 is of a cylindrical hollow structure and is made of wear-resistant materials, an oil hole 18 and a third oil duct 19 are arranged in the middle of the bushing 5, the tappet body 2 is arranged in the machine body 1, the tappet body 2 is contacted with a push rod 15 in a valve transmission mechanism through a thrust block 3 and avoids abrasion caused by direct contact of the push rod 15 and the surface of the tappet body 2, the tappet body 2 is provided with a thrust block mounting hole 8, a positioning shaft mounting hole 9, a first oil duct 10, a second oil duct 11, an oil cavity 12, a first positioning screw mounting hole 13 and an oil storage groove 14, the thrust block mounting hole 8, the positioning shaft mounting hole 9 and the first positioning screw mounting hole 13 are arranged corresponding to the thrust block 3, the positioning shaft 6 and the positioning screw 7, the oil lubrication device comprises a tappet body 2, a first oil passage 10, a bushing 5, a positioning shaft 6, a first oil passage 10, a second oil passage 11, a roller 4, an oil cavity 12 and an oil groove 17, wherein the first oil passage 10 and the second oil passage 11 are both of a vertical through hole structure, the processing is simple, the lubrication between the roller 4, the bushing 5, the positioning shaft 6 and the tappet body 2 and the machine body 1 directly introduces engine oil through the second oil passage 11, the oil cavity 12 and the oil groove 17, the lubrication is accurate and reliable, the oil groove 14 is introduced to the outer side surface of the roller 4 through the first oil passage 10, the outer side surface of the roller 4 is lubricated, the tappet body 2 is provided with a thrust block 3, the upper top surface of the thrust block 3 is a semi-arc surface, the lower part of the thrust block 3 is a cylinder, the upper end of the thrust block 3 is arranged close to a push rod 15, the thrust block 3 is in interference fit with the, the spherical groove at the edge of the roller 4 effectively reduces the residual stress in the roller 4 and prevents the surface deformation of the roller 4, the rotating mechanism consisting of the roller 4 and the bush 5 is fixedly connected with the tappet body 2 through the positioning shaft 6, the positioning shaft 6 is of a cylindrical structure, the positioning shaft 6 is provided with the oil groove 17 and the second positioning screw mounting hole 20, one end of the positioning shaft 6 is provided with the rectangular positioning boss 16, the rectangular positioning boss 16 prevents the tappet body 2 from rotating in the working process, the positioning is simple and reliable to use, one side of the positioning shaft 6 is fixedly connected with the tappet body 2 through the positioning screw 7, the positioning screw 7 positions the positioning shaft 6 on the tappet body 2, the positioning is accurate and reliable, the device is accurate in lubrication and reliable in mounting and positioning, and the use reliability is improved.

When in use: the thrust block 3 is arranged on the tappet body 2 in an interference fit manner, the roller 4 and the bushing 5 are arranged on the tappet body 2 in a clearance fit manner through a positioning shaft 6, and the positioning shaft 6 is fixed on the tappet body 2 through a positioning screw 7; the tappet body 2 is connected with the engine body 1 through a positioning boss 16 at one end of a positioning shaft 6, and in the working process of the diesel engine, engine oil in an oil storage groove 14 flows to a friction pair formed by the roller 4 and the bush 5, a friction pair formed by the bush 5 and the positioning shaft 6 and a friction pair formed by the tappet body 2 and the engine body 1 through a second oil duct 11, an oil cavity 12 and an oil passing groove 17 to lubricate.

The utility model discloses use safe and reliable, can effectively prolong tappet body 2's life and maintenance cycle, the ball-type recess at 4 edges of gyro wheel has effectively reduced the inside residual stress of gyro wheel 4, prevents 4 surface deformations of gyro wheel, and tappet body 2 has avoided push rod 15 and tappet body 2 surface direct contact to produce wearing and tearing through the push rod 15 contact in thrust block 3 and the valve drive mechanism.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a diesel engine gyro wheel tappet, includes organism (1) and bush (5), be provided with tappet body (2) in organism (1), be provided with thrust block (3) on tappet body (2), the upper end and push rod (15) of thrust block (3) are near setting up its characterized in that: the thrust block (3) is in interference fit with the tappet body (2), the outer side face of the bushing (5) is provided with a roller (4), a rotating mechanism formed by the roller (4) and the bushing (5) is fixedly connected with the tappet body (2) through a positioning shaft (6), and one side of the positioning shaft (6) is fixedly connected with the tappet body (2) through a positioning screw (7).

2. The diesel roller tappet according to claim 1, wherein: the tappet body (2) is provided with a thrust block mounting hole (8), a positioning shaft mounting hole (9), a first oil duct (10), a second oil duct (11), an oil cavity (12), a first positioning screw mounting hole (13) and an oil storage groove (14), wherein the thrust block mounting hole (8), the positioning shaft mounting hole (9) and the first positioning screw mounting hole (13) are correspondingly arranged with the thrust block (3), the positioning shaft (6) and the positioning screw (7).

3. The diesel roller tappet according to claim 2, wherein: the number of the first oil ducts (10) is two, the two first oil ducts (10) are symmetrically arranged on the tappet body (2), and the first oil ducts (10) and the second oil ducts (11) adopt vertical through hole structures.

4. The diesel roller tappet according to claim 1, wherein: the upper top surface of the thrust block (3) is a semi-arc surface, and the lower part of the thrust block is a cylinder.

5. The diesel roller tappet according to claim 1, wherein: the roller (4) is of a cylindrical hollow structure, and a hemispherical groove is formed in the edge of the roller (4).

6. The diesel roller tappet according to claim 1, wherein: the bushing (5) is of a cylindrical hollow structure and made of wear-resistant materials, and the middle of the bushing (5) is provided with an oil hole (18) and a third oil duct (19).

7. The diesel roller tappet according to claim 1, wherein: the positioning shaft (6) is of a cylindrical structure, an oil groove (17) and a second positioning screw mounting hole (20) are formed in the positioning shaft (6), and a rectangular positioning boss (16) is arranged at one end of the positioning shaft (6).