A positively lubricated roller lifter assembly
By setting multiple lubrication channels and limiting structures in the tappet body, the problem of insufficient lubrication of the roller tappet assembly is solved, and effective lubrication of the inner and outer rollers and roller pins is achieved, thus extending the service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGXI YUCHAI MARINE & GENSET POWER CO LTD
- Filing Date
- 2025-07-30
- Publication Date
- 2026-08-04
AI Technical Summary
The lubricating oil in existing roller tappet assemblies is insufficient to effectively lubricate the inner and outer rollers and roller pins, resulting in severe wear and shortened service life.
A forced and effective lubrication roller tappet assembly was designed. By setting multiple lubrication channels and limiting structures in the tappet body, the lubricating oil is effectively delivered to the contact surfaces of the inner and outer rollers and roller pins. The assembly includes a first lubrication channel, an oil storage chamber, a second lubrication channel, and a third lubrication channel. Combined with the limiting structure, axial movement is prevented.
This achieves effective lubrication of the roller tappet assembly, extending its service life, reducing wear, and improving the durability of the assembly.
Smart Images
Figure CN224592198U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of engine technology, and more specifically, to a forced effective lubrication roller tappet assembly. Background Technology
[0002] Tappets are a key component in the engine valve train. The function and working principle of tappets are as follows: the tappet contacts the cam at the bottom, and the rotation of the camshaft converts the profile of the cam into the up-and-down reciprocating motion of the tappet. The push rod inserted into the inner cavity of the tappet transmits the up-and-down reciprocating motion to the rocker arm, and finally the rocker arm realizes the opening and closing action of the intake and exhaust valves.
[0003] Currently, direct injection technology is widely used in automobile engines to make fuel combustion more complete. The fuel pump system is particularly important in direct injection technology. In the fuel pump system, the pump tappet is an indispensable part. In order to prevent wear of the roller tappet assembly, it is necessary to lubricate the roller tappet assembly. The purpose is to prevent abnormal wear of the roller tappet assembly when it rotates at high speed.
[0004] Existing tappets are classified into flat-bottom tappets and roller tappets according to their structural type. Roller tappets include a tappet body, an outer roller, an inner roller, and roller pins. In the existing structure, the lubricating oil in the lubrication groove can easily flow from the outside of the outer roller to the bottom, which cannot effectively lubricate the inner and outer rollers and roller pins, which can easily lead to wear and damage to the roller tappet assembly, thus shortening its service life. Utility Model Content
[0005] The technical problem to be solved by this utility model is to address the above-mentioned shortcomings of the prior art by providing a forced and effective lubrication roller tappet assembly that effectively lubricates the outer roller, inner roller, and roller pin, thereby extending their service life.
[0006] The technical solution of this utility model is as follows: a forced effective lubrication roller tappet assembly includes a tappet body, a roller, and a roller pin. One end of the tappet body is provided with a mounting groove, and mounting holes are provided on both sides of the mounting groove. The axis of the mounting holes is perpendicular to the axis of the tappet body. Both ends of the roller pin are respectively installed in the mounting holes on both sides of the mounting groove. The roller is installed on the roller pin. The other end of the tappet body is provided with a tappet cavity. A first lubricating oil passage is provided in the tappet cavity. Oil storage cavities communicating with the first lubricating oil passage are provided on the tappet bodies on both sides of the roller. A limiting structure to prevent axial movement of the roller is provided in the oil storage cavity. The roller includes an inner roller and an outer roller. The inner roller is sleeved on the roller pin, and the outer roller is sleeved on the inner roller. A second lubricating oil passage is provided on the outer wall of the inner roller. The second lubricating oil passage communicates with the oil storage cavity. A third lubricating oil passage penetrating the inner roller is provided in the second lubricating oil passage.
[0007] As a further improvement, the second lubrication channel is arranged in a spiral shape on the outer wall surface of the inner roller.
[0008] Furthermore, the axis of the third lubricating oil passage is perpendicular to the axis of the inner roller, and the axis of the third lubricating oil passage and the midpoint of the inner roller are on the same plane.
[0009] Furthermore, there are two first lubricating oil passages, and the two first lubricating oil passages are symmetrically distributed in the tappet cavity about the axis of the tappet body.
[0010] Furthermore, the limiting structure includes two identical limiting blocks, which are respectively installed on the inner walls of the oil storage chambers on both sides of the outer roller.
[0011] Furthermore, the outer wall surface of the roller pin is provided with a first annular groove, and the inner wall surface of the inner roller is provided with a second annular groove corresponding to the first annular groove. The first annular groove and the second annular groove are combined to form an annular limiting groove, and a limiting ring is provided in the annular limiting groove.
[0012] Beneficial effects
[0013] Compared with the prior art, this utility model has the following advantages:
[0014] This utility model discloses a forced and effective lubrication roller tappet assembly. Lubricating oil enters the oil storage chamber through the first lubrication oil passage. When the engine is running, the outer roller moves under the drive of the cam, thus forming relative motion with the inner roller. The lubricating oil enters the relative motion contact surface between the inner roller and the outer roller through the second lubrication oil passage on the inner roller, and then enters the contact surface between the inner roller and the roller pin through the third lubrication oil passage. This effectively lubricates the contact surfaces between the outer roller, the inner roller, and the roller shaft, thereby extending their service life. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the front cross-sectional structure of this utility model;
[0016] Figure 2 for Figure 1 Enlarged structural diagram of A in the middle;
[0017] Figure 3 This is a top view of the structure of this utility model;
[0018] Figure 4 This is a three-dimensional structural diagram of the inner roller in this utility model.
[0019] Wherein: 1-Holder body, 2-Roller, 3-Roller pin, 4-Mounting groove, 5-Mounting hole, 6-Push-in cavity, 7-First lubricating oil passage, 8-Oil storage cavity, 9-Second lubricating oil passage, 10-Third lubricating oil passage, 11-Limiting block, 12-First annular groove, 13-Second annular groove, 14-Annular limiting groove, 15-Limiting ring, 21-Inner roller, 22-Outer roller. Detailed Implementation
[0020] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.
[0021] See Figure 1-4 A forced effective lubrication roller tappet assembly includes a tappet body 1, a roller 2, and a roller pin 3. One end of the tappet body 1 has a mounting groove 4, and mounting holes 5 are provided on both sides of the mounting groove 4. The axis of the mounting holes 5 is perpendicular to the axis of the tappet body 1. Both ends of the roller pin 3 are respectively installed in the mounting holes 5 on both sides of the mounting groove 4. The roller 2 is mounted on the roller pin 3. The other end of the tappet body 1 has a tappet cavity 6, and a first lubrication oil passage 7 is provided within the tappet cavity 6. The roller 2... The side column 1 is provided with an oil storage chamber 8 that communicates with the first lubricating oil passage 7. The oil storage chamber 8 is provided with a limiting structure to prevent the roller 2 from moving axially. The roller 2 includes an inner roller 21 and an outer roller 22. The inner roller 21 is sleeved on the roller pin 3, and the outer roller 22 is sleeved on the inner roller 21. The outer wall surface of the inner roller 21 is provided with a second lubricating oil passage 9, which communicates with the oil storage chamber 8. The second lubricating oil passage 9 is provided with a third lubricating oil passage 10 that penetrates the inner roller 21.
[0022] During use, lubricating oil enters the storage chamber 8 through the first lubricating oil passage 7. When the engine starts running, the outer roller 22 moves under the drive of the cam, thus forming a relative movement with the inner roller 21. The lubricating oil enters the relative movement contact surface between the inner roller 21 and the outer roller 22 through the second lubricating oil passage 9 on the inner roller 21, and then enters the contact surface between the inner roller 21 and the roller pin 3 through the third lubricating oil passage 10. This effectively lubricates the contact surfaces between the outer roller 22, the inner roller 21, and the roller shaft 3, thereby extending their service life.
[0023] In this embodiment, the second lubricating oil channel 9 is arranged in a spiral shape on the outer wall of the inner roller 21. The second lubricating oil channel 9 is inclined on the outer wall of the inner roller 21. When the inner roller 21 rotates, it is easier for the lubricating oil in the storage oil cavity 8 to enter the second lubricating oil channel 9. At the same time, the spiral arrangement of the second lubricating oil channel 9 can increase the volume of the second lubricating oil channel 9 on the inner roller 21.
[0024] In this embodiment, the axis of the third lubrication channel 10 is perpendicular to the axis of the inner roller 21, which facilitates the flow of lubricating oil in the second lubrication channel 9 into the space between the inner roller 21 and the roller pin 3 along the third lubrication channel 10. Furthermore, the axis of the third lubrication channel 10 is on the same plane as the midpoint of the inner roller 21, and the third lubrication channel 10 is located at the midpoint of the inner roller 21. This ensures that the lubricating oil entering from the third lubrication channel 10 to lubricate the space between the inner roller 21 and the roller pin 3 travels the same distance to both sides of the inner roller 21, further optimizing the lubrication effect between the inner roller 21 and the roller pin 3 and preventing wear.
[0025] In this embodiment, there are two first lubricating oil channels 7, and the two first lubricating oil channels 7 are symmetrically distributed in the tappet cavity 6 about the axis of the tappet body 1. The lubricating oil in the tappet cavity 6 enters the storage oil cavity 8 through the first lubricating oil channels 7, which makes it easier for the lubricating oil in the tappet cavity 6 to enter the storage oil cavity 8 from the first lubricating oil channels 7.
[0026] In this embodiment, the limiting structure includes two identical limiting blocks 11. The two limiting blocks 11 are respectively installed on the inner walls of the oil storage chambers 8 on both sides of the outer roller 22. The sides of the two limiting blocks 11 correspond to the end faces of the outer roller 22. When the outer roller 22 is in an axial position along the direction of the roller pin 3, the limiting blocks 11 on both sides of the outer roller 22 limit it, thereby preventing the outer roller 22 from being in an axial position. The limiting blocks 11 and the end faces of the outer roller 22 are in clearance fit. The lubricating oil in the first lubrication oil channel 7 can flow into the oil storage chamber 8 through the gap between the limiting blocks 11 and the outer roller 22. The lubricating oil can both lubricate and prevent excessive friction between the outer roller 22 and the limiting blocks 11. The limiting blocks 11 can both limit the axial displacement of the outer roller 22 and ensure that only a small amount of friction and wear occurs between them.
[0027] In this embodiment, a first annular groove 12 is provided on the outer wall surface of the roller pin 3, and a second annular groove 13 corresponding to the first annular groove 12 is provided on the inner wall surface of the inner roller 21. The first annular groove 12 and the second annular groove 13 are combined to form an annular limiting groove 14. A limiting ring 15 is provided in the annular limiting groove 14. The cooperation between the annular limiting groove 14 and the limiting ring 15 can prevent the inner roller 21 from moving axially, and the annular limiting groove 14 can store lubricating oil.
[0028] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present utility model. These modifications and improvements will not affect the effectiveness of the present utility model or the practicality of the patent.
Claims
1. A positive force lubrication roller lifter assembly comprising a lifter body (1), a roller (2), a roller pin (3), characterized in that, One end of the tappet (1) is provided with a mounting groove (4), and mounting holes (5) are provided on both sides of the mounting groove (4). The axis of the mounting holes (5) is perpendicular to the axis of the tappet (1). The two ends of the roller pin (3) are respectively installed in the mounting holes (5) on both sides of the mounting groove (4). The roller (2) is installed on the roller pin (3). The other end of the tappet (1) is provided with a tappet cavity (6). The tappet cavity (6) is provided with a first lubricating oil passage (7). The tappets (1) on both sides of the roller (2) are provided with the first lubricating oil passage (7). 7) A connected oil storage chamber (8) is provided in the oil storage chamber (8) to prevent the roller (2) from moving axially. The roller (2) includes an inner roller (21) and an outer roller (22). The inner roller (21) is sleeved on the roller pin (3), and the outer roller (22) is sleeved on the inner roller (21). A second lubricating oil passage (9) is provided on the outer wall surface of the inner roller (21). The second lubricating oil passage (9) is connected to the oil storage chamber (8). A third lubricating oil passage (10) is provided in the second lubricating oil passage (9) that penetrates the inner roller (21).
2. A positive lubrication roller lifter assembly as defined in claim 1 wherein, The second lubrication channel (9) is arranged in a spiral shape on the outer wall surface of the inner roller (21).
3. The positive lubrication roller lifter assembly of claim 1 wherein, The axis of the third lubrication channel (10) is perpendicular to the axis of the inner roller (21), and the axis of the third lubrication channel (10) and the midpoint of the inner roller (21) are on the same plane.
4. The positive lubrication roller lifter assembly of claim 1 wherein, There are two first lubricating oil passages (7), and the two first lubricating oil passages (7) are symmetrically distributed in the tappet cavity (6) about the axis of the tappet body (1).
5. The positive lubrication roller lifter assembly of claim 1 wherein, The limiting structure includes two limiting blocks (11) with the same structure. The two limiting blocks (11) are respectively installed on the inner wall of the oil storage chamber (8) on both sides of the outer roller (22).
6. The positive lubrication roller lifter assembly of claim 1 wherein, The outer wall of the roller pin (3) is provided with a first annular groove (12), and the inner wall of the inner roller (21) is provided with a second annular groove (13) corresponding to the first annular groove (12). The first annular groove (12) and the second annular groove (13) are combined to form an annular limiting groove (14), and a limiting ring (15) is provided in the annular limiting groove (14).