CN211174253U - Take lubricating structure's inside and outside roller type rocking arm - Google Patents
Take lubricating structure's inside and outside roller type rocking arm Download PDFInfo
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- CN211174253U CN211174253U CN201921554093.7U CN201921554093U CN211174253U CN 211174253 U CN211174253 U CN 211174253U CN 201921554093 U CN201921554093 U CN 201921554093U CN 211174253 U CN211174253 U CN 211174253U
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Abstract
The utility model discloses a take lubricating structure's inside and outside roller type rocking arm, its characterized in that: the rocker shaft is provided with a first radial oil outlet hole and a second radial oil outlet hole which are communicated with a main oil duct of the engine body; a first oil passage and a second oil passage which are respectively communicated with the first radial oil outlet hole and the second radial oil outlet hole are formed in the rocker arm body; a lubricating oil path is arranged in the roller shaft, one end of the lubricating oil path is communicated with the first oil passage, and the other end of the lubricating oil path is communicated with a gap between the roller shaft and the inner roller; a radial oil duct is arranged in the inner roller, one end of the radial oil duct is communicated with the gap between the roller shaft and the inner roller, and the other end of the radial oil duct is communicated with the gap between the outer roller and the inner roller; the second oil passage is communicated with the gap between the outer roller and the abdicating area of the rocker arm body. The utility model provides a take lubricating structure's inside and outside roller type rocking arm makes machine oil flow rapidly and carries out abundant timely lubrication in each clearance of rocking arm axle part, reduces the wearing and tearing that impact and friction caused, prolongs the life-span of rocking arm.
Description
Technical Field
The utility model relates to an engine parts technical field specifically is a take lubricating structure's inside and outside roller type rocking arm.
Background
The roller rocker arm matched with the overhead camshaft generally adopts a roller shaft and an outer roller structure or a roller shaft, an inner roller and an outer roller structure, wherein the inner roller structure and the outer roller structure have the advantage of reducing load compared with the independent outer roller structure. However, the contact stress between the roller and the cam of the overhead camshaft structure is larger than that of the central structure, and the roller shaft and the outer roller structure have the defects that the stress of the outer roller is concentrated and the outer roller is not easy to rotate. Conventional roller shaft, interior gyro wheel, outer roller structure are because outer gyro wheel working face is the face of cylinder of flat, have the atress from the outside of outer roller to the condition that the inboard extends, lack effectual lubricated oil circuit setting simultaneously, and after high load operational environment or machine oil used for a long time, contact fatigue wearing and tearing appear easily with the camshaft in the gyro wheel, and valve clearance grow or cam phase place have the deviation, influence complete machine performance and emission.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned current defect, the utility model provides a take lubricating structure's inside and outside roller type rocking arm makes machine oil flow rapidly and carries out abundant timely lubrication in each clearance of rocking arm axle part, reduces the wearing and tearing that impact and friction caused, prolongs the life-span of rocking arm.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
the utility model provides a take lubricating structure's inside and outside roller type rocking arm, includes the rocking arm body, the rocking arm axle, the roller shaft, interior gyro wheel, outer gyro wheel, and:
the first gap is formed by the clearance fit between the roller shaft and the inner roller;
the second gap is formed by the clearance fit between the inner roller and the outer roller;
a third gap formed between the outer roller and the abdication area at one end of the rocker arm body;
the rocker arm shaft is provided with a radial oil outlet hole communicated with the main oil duct of the engine body, and a first oil passing duct and a second oil passing duct which are respectively communicated with the radial oil outlet hole are arranged in the rocker arm body;
a lubricating oil path is arranged in the roller shaft, one end of the lubricating oil path is communicated with the first oil passage, and the other end of the lubricating oil path is communicated with the first gap; a radial oil duct is arranged in the inner roller, one end of the radial oil duct is communicated with the first gap, and the other end of the radial oil duct is communicated with the second gap; the second oil passage is communicated with the third gap.
Specifically, the radial oil outlet holes comprise a first radial oil outlet hole and a second radial oil outlet hole, and the first oil passing channel and the second oil passing channel are respectively communicated with the first radial oil outlet hole and the second radial oil outlet hole; the first oil passage and the second oil passage are arranged in parallel.
Specifically, the outlet of the second oil passage is higher than the center of the outer roller.
Specifically, the lubricating oil path comprises a first radial channel, an axial channel, a second radial channel and a third radial channel, wherein the end part of the first radial channel is communicated with the first oil passing channel, the middle part of the axial channel is arranged along the axial lead of the roller shaft, and the middle part of the axial channel is respectively and radially and symmetrically arranged on the second radial channel and the third radial channel.
Specifically, the radial oil passage includes a fourth radial passage and a fifth radial passage which are respectively and radially and symmetrically formed.
Specifically, the outer surface of the outer roller is provided with an arc-shaped bulge.
Specifically, one axial side of the roller shaft is provided with a process hole for alignment.
Compared with the prior art, the utility model discloses following beneficial effect has:
1) the roller adopts an inner roller and an outer roller, the inner roller is sleeved on the roller shaft, the outer roller is sleeved outside the inner roller, a lubricating oil path is formed among the clearance area, the roller shaft, the inner roller and the outer roller through reasonable gaps, and the rolling of the outer roller is facilitated through the lubrication. Because the deformation of the contact surface of the inner roller and the outer roller is smaller, the contact surface pressure is lower than that of the contact surface of the roller shaft and the outer roller, and partial acting force makes the roller rotate under the lubricating action when the stress point of the roller changes, so that the load of the contact part is reduced.
2) The outer roller is bulged in a drum shape, and the outer roller is better in support rigidity when being closer to the middle, the outer roller is provided with a reasonable drum shape amount, the contact position of the outer roller and the cam shaft extends outwards from the middle, and early abrasion caused by edge contact is avoided. Meanwhile, more engine oil can enter the contact surface of the outer roller and the cam shaft from two sides by reasonable drum-shaped amount, and the lubrication and heat dissipation of the kinematic pair are facilitated.
3) The rocker body increases the jet orifice with rocker bush intercommunication, and through the contact position of forcing the lubricated outer gyro wheel of oil guide and camshaft, form effectual lubricating film and heat dissipation to outer gyro wheel and camshaft contact position more rapidly. And the position of the spray hole is slightly higher than the center of the outer roller, so that the lubrication area can be increased along with the rotation of the roller.
Drawings
Fig. 1 is a schematic view of the lubricating structure of the present invention.
Fig. 2 is a sectional view of a lubrication structure of the first oil passage according to an embodiment of the present invention.
Fig. 3 is a sectional view of a lubricating structure of the second oil passage according to the embodiment of the present invention.
Fig. 4 is a cross-sectional view of the embodiment of the present invention showing a third gap.
Fig. 5 is a sectional view of the roller shaft according to the present invention.
Fig. 6 is a sectional view of the inner roller according to the present invention.
Fig. 7 is a sectional view of the outer roller according to the present invention.
Parts indicated by respective reference numerals in the drawings: 1-rocker arm body, 2-rocker arm shaft, 3-relief area, 4-roller shaft, 5-inner roller, 6-outer roller, 7-first radial oil outlet, 8-second radial oil outlet, 9-first oil passage, 10-second oil passage, 11-lubricating oil passage, 12-first radial passage, 13-axial passage, 14-second radial passage, 15-third radial passage, 16-fourth radial passage, 17-fifth radial passage, 18-arc bulge, 19-process hole, 20-first clearance, 21-second clearance and 22-third clearance.
Detailed Description
In order to explain the technical content, the achieved objects and the effects of the present invention in detail, the following description is made in conjunction with the embodiments and the accompanying drawings.
As shown in fig. 1-7, the utility model provides an inside and outside roller type rocker arm with lubricating structure, which comprises a rocker arm body 1, a rocker arm shaft 2, a rolling shaft 4, an inside roller 5 and an outside roller 6. The middle part of the rocker arm body 1 is sleeved on the rocker arm shaft 2 to form a revolute pair with the rocker arm shaft 2; a yielding area 3 is arranged at one end of the rocker arm body 1, the rolling shaft 4 is installed on the yielding area 3 in an interference fit mode, the inner roller 3 is rotatably sleeved on the rolling shaft 4 in a clearance fit mode, and the outer roller 6 is rotatably sleeved on the inner roller 5 in a clearance fit mode. Wherein, the clearance formed by clearance fit between the roller shaft 4 and the inner roller 5 is a first clearance 20; the gap formed by the clearance fit between the inner roller 5 and the outer roller 6 is a second gap 21; the gap formed between the outer roller 6 and the abdicating area 3 at one end of the rocker arm body 1 is a third gap 22.
As shown in fig. 1, the rocker arm shaft 2 is provided with a radial oil outlet hole communicated with a main oil passage of the engine body; a first oil passage 9 and a second oil passage 10 which are respectively communicated with the radial oil outlet holes are arranged in the rocker arm body 1; referring to fig. 2, a lubrication oil path 11 is provided in the roller shaft 4, and one end of the lubrication oil path 11 is communicated with the first oil gallery 9, and the other end is communicated with a first gap 20 formed between the roller shaft 4 and the inner roller 5; a radial oil passage is arranged in the inner roller 5, one end of the radial oil passage is communicated with a first gap 20 formed between the roller shaft 4 and the inner roller 5, and the other end of the radial oil passage is communicated with a second gap 21 formed between the outer roller 6 and the inner roller 5; referring to fig. 3, the second oil gallery 10 communicates with the outer roller 6 and a third gap 22 between the yielding regions 3 of the rocker body 1 for mounting the rollers.
The principle of the utility model is as follows: when the engine runs, lubricating oil enters the radial oil outlet hole of the rocker shaft 2 through the main oil passage of the engine body and is divided into two parts through the first oil passage 9 and the second oil passage 10 of the rocker body 1; lubricating oil in the first oil passage 9 is led into a lubricating oil passage 11 of the roller shaft 4, passes through an outlet to form a first gap 20 between the roller shaft 4 and the inner roller 5, and provides lubrication for friction between the roller shaft 4 and the inner roller 5; as the oil pressure rises, the lubricating oil enters the radial oil passage of the inner roller 5 from the first gap 20 between the roller shaft 4 and the inner roller 5, and thus passes to the second gap 21 between the outer roller 6 and the inner roller 5 to provide lubrication for the friction between the outer roller 6 and the inner roller 5. On the other hand, the lubricating oil in the second oil passage 10 directly passes through the third gap 22 between the outward roller 6 and the abdicating area 3 formed by the rocker arm body 1 for mounting the roller, and provides lubrication for the friction between the outward roller 6 and the engine cam through high-pressure injection. Above-mentioned lubricating oil has formed the oil film through the pressure effect, when the frictional property when improving the start-up, can prevent to produce and touch fatigue wear, has reached the utility model aims at.
As a preferable scheme of the embodiment, for convenience of processing and better diversion of the lubricating oil, the radial oil outlet holes include a first radial oil outlet hole 7 and a second radial oil outlet hole 8, the first oil passing channel 9 and the second oil passing channel 10 are respectively communicated with the first radial oil outlet hole 7 and the second radial oil outlet hole 8, and the first oil passing channel 9 and the second oil passing channel 10 are arranged in parallel with each other.
As a preferable scheme of the present embodiment, as shown in fig. 3 to 4, the outlet of the second oil passage 10 is higher than the center of the outer roller 6, so that the lubricating area can be increased along with the rotation of the outer roller 6, and an effective lubricating oil film and heat dissipation can be formed more rapidly at the contact position of the outer roller 6 and the camshaft, so as to achieve the purpose of forcibly guiding oil to lubricate the contact position of the outer roller 6 and the camshaft.
As a preferable scheme of the present embodiment, as shown in fig. 5, the lubricating oil path 11 includes a first radial passage 12 whose end portion is communicated with the first oil passage 9, an axial passage 13 whose middle portion is opened along the axial line of the roller shaft 4, and a second radial passage 14 and a third radial passage 15 which are respectively opened in the middle portion of the axial passage 13 in a radially symmetrical manner. Two radial passages are arranged for providing lubrication for the clearance friction between the roller shaft 4 and the inner roller 5, so that the effect of forced lubrication that lubricating oil is quickly shunted to reach an appointed area under high-pressure starting is achieved.
As a preferable solution of the present embodiment, as shown in fig. 6, the radial oil passage includes a fourth radial passage 16 and a fifth radial passage 17, which are radially symmetrically formed. The same purpose as the above is achieved by providing two radial channels for lubricating the friction between the outer roller 6 and the inner roller 5, so that the lubricating oil is quickly shunted to reach the designated area for forced lubrication under high-pressure starting.
As a preferable mode of the present embodiment, referring to fig. 7, since the outer roller 6 has the rigidity as closer to the middle support as possible, the outer surface of the outer roller 6 is provided with the arc-shaped protrusions 18, and the outer roller 6 has a reasonable drum shape amount, so that the contact position of the outer roller 6 with the camshaft is ensured to extend outward from the middle, and early wear due to edge contact is avoided. Meanwhile, more engine oil can enter the contact surface between the outer roller 6 and the camshaft from the two sides of the abdicating area 3 by reasonable drum-shaped amount, which is beneficial to improving the lubrication and heat dissipation of the kinematic pair.
As a preferable scheme of the embodiment, since the lubricating oil path 11 is designed to be unique, in order to ensure the manufacturing/assembling accuracy of the lubricating oil path 11, a process hole 19 for alignment is provided at one axial side of the roller shaft 4 for the assembly control of the manufacturing process.
Although the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (7)
1. An internal and external roller type rocker arm with a lubricating structure is characterized by comprising a rocker arm body (1) and a rocker arm shaft (2),
a roller shaft (4), an inner roller (5), an outer roller (6), and:
a first gap (20) formed by the clearance fit between the roller shaft (4) and the inner roller (5);
a second gap (21) formed by the clearance fit between the inner roller (5) and the outer roller (6);
a third gap (22) formed between the outer roller (6) and the relief area (3) at one end of the rocker body (1);
the rocker arm shaft (2) is provided with a radial oil outlet hole communicated with a main oil duct of the engine body, and a first oil passage (9) and a second oil passage (10) which are respectively communicated with the radial oil outlet hole are arranged in the rocker arm body (1);
a lubricating oil path (11) is arranged in the roller shaft (4), one end of the lubricating oil path (11) is communicated with the first oil passage (9), and the other end of the lubricating oil path (11) is communicated with the first gap (20); a radial oil duct is arranged in the inner roller (5), one end of the radial oil duct is communicated with the first gap (20), and the other end of the radial oil duct is communicated with the second gap (21); the second oil passage (10) is communicated with the third gap (22).
2. An inner and outer roller type rocker arm with a lubricating structure as set forth in claim 1, wherein: the radial oil outlet holes comprise a first radial oil outlet hole (7) and a second radial oil outlet hole (8), and a first oil passage (9) and a second oil passage (10) are respectively communicated with the first radial oil outlet hole (7) and the second radial oil outlet hole (8); the first oil passage (9) and the second oil passage (10) are arranged in parallel.
3. The inner and outer roller type rocker arm with a lubricating structure according to claim 1 or 2, wherein: the outlet of the second oil passage (10) is higher than the center of the outer roller (6).
4. An inner and outer roller type rocker arm with a lubricating structure as set forth in claim 1, wherein: the lubricating oil path (11) comprises a first radial channel (12) with the end part communicated with the first oil passing channel (9), an axial channel (13) with the middle part arranged along the axial lead of the roller shaft (4), and a second radial channel (14) and a third radial channel (15) which are respectively and radially and symmetrically arranged at the middle part of the axial channel (13).
5. An inner and outer roller type rocker arm with a lubricating structure as set forth in claim 1, wherein: the radial oil passage comprises a fourth radial passage (16) and a fifth radial passage (17) which are respectively and radially and symmetrically arranged.
6. An inner and outer roller type rocker arm with a lubricating structure as set forth in claim 1, wherein: the outer surface of the outer roller (6) is provided with an arc-shaped bulge (18).
7. An inner and outer roller type rocker arm with a lubricating structure as set forth in claim 1, wherein: and one axial side of the roller shaft (4) is provided with a process hole (19) for alignment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921554093.7U CN211174253U (en) | 2019-09-18 | 2019-09-18 | Take lubricating structure's inside and outside roller type rocking arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921554093.7U CN211174253U (en) | 2019-09-18 | 2019-09-18 | Take lubricating structure's inside and outside roller type rocking arm |
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| Publication Number | Publication Date |
|---|---|
| CN211174253U true CN211174253U (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921554093.7U Active CN211174253U (en) | 2019-09-18 | 2019-09-18 | Take lubricating structure's inside and outside roller type rocking arm |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110552751A (en) * | 2019-09-18 | 2019-12-10 | 广西玉柴机器股份有限公司 | take lubricating structure's inside and outside roller type rocking arm |
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2019
- 2019-09-18 CN CN201921554093.7U patent/CN211174253U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110552751A (en) * | 2019-09-18 | 2019-12-10 | 广西玉柴机器股份有限公司 | take lubricating structure's inside and outside roller type rocking arm |
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