CN217462289U - Diesel engine roller tappet - Google Patents
Diesel engine roller tappet Download PDFInfo
- Publication number
- CN217462289U CN217462289U CN202221728453.2U CN202221728453U CN217462289U CN 217462289 U CN217462289 U CN 217462289U CN 202221728453 U CN202221728453 U CN 202221728453U CN 217462289 U CN217462289 U CN 217462289U
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- China
- Prior art keywords
- roller
- gyro wheel
- tappet
- tappet body
- round pin
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Abstract
The utility model relates to a diesel engine technical field, concretely relates to diesel engine gyro wheel tappet. Including the tappet body, the inner chamber has been seted up to the tappet body upper end, open the tappet body lower extreme has the roller groove, the gyro wheel is installed through fore-and-aft round pin axle in the roller groove, round pin axle and tappet body fixed connection, the gyro wheel stretches out tappet body lower extreme, it is fixed with the guide key to inlay on the tappet body, set up the oblique oil duct with the inner chamber intercommunication on the tappet body, inner chamber and roller groove communicate through vertical through-hole, the roller inslot is fixed with the baffle, the baffle is located round pin axle below, the slotted hole has been seted up on the baffle, the gyro wheel runs through the slotted hole, the pore wall and the gyro wheel outer fringe clearance fit of slotted hole, fore-and-aft elongated slot has been seted up to round pin axle lower extreme, the elongated slot runs through the gyro wheel. The utility model discloses, simple structure can carry out effectual lubrication to the contact surface of gyro wheel and cam, can carry out effectual lubrication to the friction of gyro wheel and round pin axle is vice, and the baffle can restrict the axial displacement of gyro wheel, has increased the structural strength of round pin axle.
Description
Technical Field
The utility model relates to a diesel engine technical field, concretely relates to diesel engine gyro wheel tappet.
Background
The tappet is a key part in an engine valve mechanism, and the function and the working principle of the tappet are as follows: the lower part of the tappet is in contact with the cam, the profile of the cam is converted into the vertical reciprocating motion of the tappet through the rotation of the cam shaft, the vertical reciprocating motion is transmitted to the rocker arm through the push rod inserted in the inner cavity of the tappet, and finally the opening and closing actions of the air inlet valve and the air outlet valve are realized through the rocker arm.
The tappet is divided into a flat-bottom tappet and a roller tappet according to the structural types. The flat-bottom tappet is in contact with the cam through a bottom plane and is in sliding friction; the roller type tappet is contacted with the cam through a roller, and rolling friction is adopted. Roller type tappet among the prior art includes the tappet body, the tappet inner chamber that is used for the cartridge push rod is offered to the tappet body upper end, the tappet body lower extreme is opened there is the roller groove, install the gyro wheel that stretches out tappet body lower extreme face through the round pin axle in the roller groove, round pin axle and tappet body interference fit, the gyro wheel rotates around the round pin axle and its cylinder contacts with the cam, tappet inner chamber bottom surface is equipped with the vertical through-hole of leading directly to the central point of roller groove roof and putting, thereby this vertical through-hole is used for carrying lubricating oil to lubricated gyro wheel and cam's contact surface on the cylinder of gyro wheel, still be equipped with the guide key that the cross-section is the rectangle on the tappet body.
The existing roller tappet mainly has the following defects: lubricating oil flows down from the vertical through hole and falls to the central part of the cylindrical surface of the roller, so that the contact surface of the roller and the cam can be lubricated, and the lubricating oil is difficult to flow to a friction pair of the roller and a pin shaft, so that the friction pair of the roller and the pin shaft cannot be lubricated, the smooth rotation of the roller is further influenced, the roller cannot rotate in severe cases, the rolling friction of the roller is changed into sliding friction, the abrasion is intensified, and the service life of the roller is shortened; when the roller rotates on the pin shaft, the roller can generate axial movement due to no limitation in the axial direction, and after long-time work, the movement of the roller can increase the abrasion on the surface of the cam, so that the service life of the whole transmission mechanism is shortened; and thirdly, the pin shaft is easy to bend and deform after being used for a long time, and the service life is short.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that one kind can carry out effectual lubrication to the friction pair of gyro wheel and round pin axle, can prevent simultaneously that the gyro wheel from appearing the axial float in the course of the work, can increase the structural strength of round pin axle, improves life's diesel engine gyro wheel tappet.
In order to realize the purpose, the utility model provides a technical scheme is:
the utility model provides a diesel engine gyro wheel tappet, including the tappet body, the inner chamber has been seted up to the tappet body upper end, the tappet body lower extreme is opened there is the roller groove, the gyro wheel is installed through fore-and-aft round pin axle in the roller groove, round pin axle and tappet body fixed connection, the gyro wheel stretches out tappet body lower extreme, it is fixed with the guide key to inlay on the tappet body, set up the oblique oil duct with the inner chamber intercommunication on the tappet body, inner chamber and roller groove pass through vertical through-hole intercommunication, the roller inslot is fixed with the baffle, the baffle is located round pin axle below, the slotted hole has been seted up on the baffle, the gyro wheel runs through the slotted hole, the pore wall and the gyro wheel outer fringe clearance fit of slotted hole, fore-and-aft elongated slot has been seted up to round pin axle lower extreme, the elongated slot runs through the gyro wheel.
Specifically, a gap is formed between the lower end of the pin shaft and the upper end of the baffle.
Specifically, support plates are fixed in roller grooves on the front side and the rear side of the roller, the lower ends of the support plates tightly abut against the upper end of the pin shaft, and the through hole is located between the two support plates.
Specifically, fillets are machined on the left side and the right side of a notch of the long groove.
Specifically, the through hole is located above the roller.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses, moreover, the steam generator is simple in structure, the machine oil that enters into the roller inslot can be through the clearance between gyro wheel outer fringe and the slotted hole pore wall, under the current-limiting effect in clearance between gyro wheel outer fringe and the slotted hole pore wall, the machine oil that enters into the roller inslot can keep in the roller inslot of baffle top, can carry out effectual lubrication to the contact surface of gyro wheel and cam, the machine oil of keeping in the roller inslot of baffle top can enter into in the elongated slot, thereby carry out effectual lubrication to the friction pair of gyro wheel and round pin axle, the baffle can restrict the axial displacement of gyro wheel, can prevent that the gyro wheel from axial float from appearing in the course of the work, the extension board can carry out the outrigger to the round pin axle, the structural strength of round pin axle has been increased, service life thereof is prolonged.
Drawings
Fig. 1 is a schematic view of the internal structure of the present invention.
Fig. 2 is a three-dimensional view of the cooperation of the baffles, the pins and the rollers.
Fig. 3 is a three-dimensional view of the baffle.
Fig. 4 is a three-dimensional view of the pin.
Detailed Description
As shown in fig. 1-4, a roller tappet for a diesel engine comprises a tappet body 1, wherein an inner cavity 2 is formed at the upper end of the tappet body 1, a roller groove 6 is formed at the lower end of the tappet body 1, a roller 11 is installed in the roller groove 6 through a longitudinal pin shaft 7, the pin shaft 7 is fixedly connected with the tappet body 1, the roller 11 extends out of the lower end surface of the tappet body 1, a guide key 3 is fixedly embedded on the tappet body 1, an inclined oil duct 4 communicated with the inner cavity 2 is formed on the tappet body 1, the inner cavity 2 is communicated with the roller groove 6 through a vertical through hole 5, the through hole 5 is positioned above the roller 11, a baffle plate 9 is fixed in the roller groove 6, the baffle plate 9 is positioned below the pin shaft 7, a gap is formed between the lower end of the pin shaft 7 and the upper end of the baffle plate 9, a slotted hole 10 is formed in the baffle plate 9, the roller 11 penetrates through the slotted hole 10, the hole wall of the slotted hole 10 is in clearance fit with the outer edge of the roller 11, a longitudinal elongated slot 8 is formed in the lower end of the pin shaft 7, the long groove 8 penetrates through the roller 11, round corners are machined on the left side and the right side of the notch of the long groove 8, support plates 12 are fixed in the roller grooves 6 on the front side and the rear side of the roller 11, the lower ends of the support plates 12 tightly abut against the upper end of the pin shaft 7, and the through hole 5 is located between the two support plates 12.
In the process of up-and-down movement of the tappet body 1, the guide key 3 can prevent the tappet body 1 from rotating when working, the inclined oil duct 4 moves up and down along with the tappet body 1, when the oil inlet end of the inclined oil duct 4 is communicated with the oil outlet of a machine body lubricating oil duct, lubricating oil in the machine body lubricating oil duct can flow into the inner cavity 2 through the inclined oil duct 4, engine oil entering the inner cavity 2 flows into the roller groove 6 through the through hole 5, the engine oil flows down through the through hole 5 and then falls onto the outer edge of the roller 11, so that the contact surface of the roller 11 and the cam is lubricated in advance, the engine oil entering the roller groove 6 can pass through a gap between the outer edge of the roller 11 and the wall of the slotted hole 10, the engine oil entering the roller groove 6 can be temporarily stored in the roller groove 6 above the baffle plate 9 under the flow limiting effect of the gap between the outer edge of the roller 11 and the wall of the slotted hole 10, the engine oil temporarily stored in the roller groove 6 above the baffle plate 9 can enter the elongated groove 8 through the gap between the pin shaft 7 and the baffle plate 9, therefore, the friction pair of the roller 11 and the pin shaft 7 is effectively lubricated, the left side and the right side of the notch of the long groove 8 are provided with the round corners, the inner edge surface of the roller 11 can be prevented from being scratched in the working process, the baffle plate 9 can limit the axial displacement of the roller 11, the roller 11 can be prevented from axially moving in the working process, the support plate 12 can stably support the pin shaft 7, the structural strength of the pin shaft 7 is improved, and the service life of the pin shaft 7 is prolonged.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. The utility model provides a diesel engine gyro wheel tappet, including the tappet body, the inner chamber has been seted up to the tappet body upper end, the tappet body lower extreme is opened there is the roller groove, install the gyro wheel through fore-and-aft round pin axle in the roller groove, round pin axle and tappet body fixed connection, the gyro wheel stretches out tappet body lower extreme, it is fixed with the guide key to inlay on the tappet body, set up the oblique oil duct with the inner chamber intercommunication on the tappet body, inner chamber and roller groove communicate through vertical through-hole, a serial communication port, the roller inslot is fixed with the baffle, the baffle is located round pin axle below, the slotted hole has been seted up on the baffle, the gyro wheel runs through the slotted hole, the pore wall and the gyro wheel outer fringe clearance fit of slotted hole, fore-and-aft elongated slot have been seted up to round pin axle lower extreme, the elongated slot runs through the gyro wheel.
2. The diesel engine roller tappet according to claim 1, wherein a gap is provided between the lower end of the pin shaft and the upper end of the baffle.
3. The roller tappet of the diesel engine as claimed in claim 1, wherein support plates are fixed in the roller grooves at the front and rear sides of the roller, the lower ends of the support plates abut against the upper end of the pin shaft, and the through hole is located between the two support plates.
4. The diesel roller tappet according to claim 1, wherein rounded corners are formed on left and right sides of the notch of the elongated groove.
5. The diesel roller tappet according to claim 1, wherein the through hole is located above the roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221728453.2U CN217462289U (en) | 2022-07-05 | 2022-07-05 | Diesel engine roller tappet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221728453.2U CN217462289U (en) | 2022-07-05 | 2022-07-05 | Diesel engine roller tappet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217462289U true CN217462289U (en) | 2022-09-20 |
Family
ID=83246400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221728453.2U Active CN217462289U (en) | 2022-07-05 | 2022-07-05 | Diesel engine roller tappet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217462289U (en) |
-
2022
- 2022-07-05 CN CN202221728453.2U patent/CN217462289U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |