CN211039412U

CN211039412U - Engine balance shaft bearing

Info

Publication number: CN211039412U
Application number: CN201921610365.0U
Authority: CN
Inventors: 邱小彪; 王维春; 霍国兵; 戎伟军
Original assignee: Ningbo Great Group Co ltd
Current assignee: Ningbo Great Group Co ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2020-07-17
Anticipated expiration: 2029-09-25

Abstract

The utility model relates to an engine balance shaft bearing, it includes the inner circle, the outer lane, roller and holder, the holder sets up between inner circle and outer lane, the roller is provided with a plurality ofly, the roller sets up on the holder and is circumference evenly to set up on the holder, be provided with first roll groove on the inside wall of outer lane, be provided with second roll groove on the lateral wall of inner circle, first roll groove and second roll groove all set up to the circular arc groove and supply the roller to roll, still including first apron and second apron, first apron and outer lane fixed connection, second apron and inner circle fixed connection, the medial surface of first apron is provided with annular arch, the lateral surface of second apron is provided with the annular groove that supplies annular arch to wear to establish, be provided with the clearance between first apron and the second apron. The utility model discloses inside having the dust and being difficult to get into the bearing, avoid the roller because the adhering to of dust leads to the scotch, the effect of the life of the balanced axle bearing of extension engine.

Description

Engine balance shaft bearing

Technical Field

The utility model belongs to the technical field of the technique of bearing and specifically relates to a balanced journal bearing of engine is related to.

Background

The balance shaft is a device for balancing and reducing the vibration of the engine, and in brief, the balance shaft is a shaft which is provided with an eccentric weight and synchronously rotates along with the crankshaft; the engine balance shaft bearing is a bearing sleeved on a balance shaft and used for enabling the shaft to rotate more smoothly and eliminating shaft shaking caused by friction, and a deep groove ball bearing is usually adopted in common engine balance shaft bearings.

Chinese patent No. CN204628298U discloses a deep groove ball bearing, which is a basic type deep groove ball bearing, and comprises an outer ring, an inner ring, rollers, and a retainer, wherein the rollers are disposed between the inner ring and the outer ring through the retainer, and rolling grooves for the rollers to roll are disposed between the inner ring and the outer ring.

The above prior art solutions have the following drawbacks: when the bearing is invaded by dirt such as dust, the dirt is attached to the surfaces of the roller and the rolling groove, the roller and the rolling groove are scratched, the motion precision of the bearing is reduced, vibration and noise are increased, and the service life of the bearing is shortened.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a balanced axle bearing of long-life engine makes the dust be difficult to get into inside the bearing.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model provides an engine balance shaft bearing, includes inner circle, outer lane, roller and holder, the holder sets up between inner circle and outer lane, the roller is provided with a plurality ofly, the roller sets up and is circumference evenly to set up on the holder and on the holder, be provided with first roll groove on the inside wall of outer lane, be provided with second roll groove on the lateral wall of inner circle, first roll groove and second roll groove all set up to the circular arc groove and supply the roller to roll, still including first apron and second apron, first apron and outer lane fixed connection, second apron and inner circle fixed connection, the medial surface of first apron is provided with annular arch, the lateral surface of second apron is provided with the annular groove that supplies annular arch to wear to establish, be provided with the clearance between first apron and the second apron.

By adopting the technical scheme, through the arrangement of the first cover plate fixed on the outer ring and the second cover plate fixed on the inner ring, dust cannot enter the inside of the engine balance shaft bearing from a gap between the inner ring and the outer ring, so that the service life of the engine balance shaft bearing is prolonged; due to the arrangement of the gap, the situation that the friction of the engine balance shaft bearing during rotation is increased due to the fact that the first cover plate is in direct contact with the second cover plate in the rotation process of the engine balance shaft bearing is avoided, and therefore the service life of the first cover plate and the service life of the second cover plate are reduced due to heat generated by friction of the first cover plate and the second cover plate are reduced; meanwhile, the arrangement of the annular protrusion and the annular groove avoids direct communication between a gap inside the engine balance shaft bearing and the outside, dust is not easy to enter the engine balance shaft bearing, and the service life of the engine balance shaft bearing is further prolonged.

The utility model discloses further set up to: the annular bulge and the annular groove are provided with a plurality of annular grooves.

Through adopting above-mentioned technical scheme, the setting up of a plurality of annular archs and annular groove has further increased the area that first apron is relative with the second apron, and the design similar to the labyrinth has further improved the dustproof effect of first apron with the second apron, has improved the life-span of engine balance shaft bearing.

The utility model discloses further set up to: the outer ring is provided with a first mounting groove for clamping a first cover plate, and the inner ring is provided with a second mounting groove for clamping a second cover plate.

Through adopting above-mentioned technical scheme, make first apron and second apron to be connected with outer lane and inner circle through simple joint structure, avoided other connection structure to need carry out the structural strength decline that sets up such as trompil to inner circle and outer lane and lead to the balanced axle bearing of engine, influence the life of the balanced axle bearing of engine.

The utility model discloses further set up to: the inboard that just is located first apron in the first mounting groove is provided with first sealed the pad, just the inboard that is located the second apron in the second mounting groove is provided with the sealed pad of second.

Through adopting above-mentioned technical scheme, the setting up of first sealed pad and second sealed pad makes first apron and second apron can be in first mounting groove and second mounting groove inside callipers tighter, it is difficult for oozing from the junction of first apron and outer lane and second apron and inner circle to adhere to the grease on roller and inner circle and outer lane, the lubricated effect of roller and inner circle and outer lane has been kept, the life of engine balance shaft bearing has been improved, also avoided because lubricated grease oozes and leads to needing to carry out frequent maintenance.

The utility model discloses further set up to: one side an organic whole that the inside wall of first apron and be close to the outer lane is connected with annular dog, annular dog has mutually supported with the inside wall of first apron and the inside wall of outer lane and has constituted the oil retaining groove.

Through adopting above-mentioned technical scheme, the setting up of first annular dog makes when the balanced journal bearing of engine is rotatory, and the grease of piling up on the inside wall of outer lane can be piled up in keeping off the oil groove, prevents that the grease from first apron and the mutual contradictory clearance department outflow of second apron, has reduced the consumption of grease, has further improved the life of the balanced journal bearing of engine.

The utility model discloses further set up to: be provided with the oil filler point on the first apron, the oil filler point communicates with the oil baffle groove mutually, the oil filler point is provided with a plurality ofly and is central symmetry setting on first apron.

By adopting the technical scheme, when oil needs to be injected into the engine balance shaft bearing, the first cover plate and the second cover plate do not need to be detached, the oil can be injected into the engine balance shaft bearing through the oil injection hole, and the operation steps in the maintenance process are simplified; the oil filler point is provided with a plurality ofly and is the mode that centrosymmetry set up, has avoided owing to only having opened an oil filler point and lead to the focus of engine balance shaft bearing to produce the skew, leads to producing vibration and noise at the rotation in-process, has further improved the life of engine balance shaft bearing.

The utility model discloses further set up to: and a first guide surface is arranged at the joint of the first rolling groove and the inner side wall of the outer ring, and a second guide surface is arranged at the joint of the first rolling groove and the outer side wall of the inner ring.

Through adopting above-mentioned technical scheme, first spigot surface and second spigot surface have constituted the oil storage area with the roller relatively, make grease because the effect of tension can be attached to in the oil storage area, increase the oil reserve of engine balance shaft bearing, have reduced because the required maintenance number of times of oiling, the cost is reduced.

The utility model discloses further set up to: the circle of inner circle internal diameter is beated and is less than 0.008mm, the circle of outer lane external diameter is beated and is less than 0.01 mm.

By adopting the technical scheme, the smaller circle runout enables the actual center of gravity of the engine balance shaft bearing in the rotating process to be small in deviation with the theoretical center of gravity, so that the engine balance shaft bearing is prevented from vibrating due to the change of the center of gravity in the rotating process, and the service life of the engine balance shaft bearing is prolonged.

The utility model discloses further set up to: the surface roughness of the inner ring, the outer ring, the roller and the retainer is Ra0.63.

By adopting the technical scheme, the roughness of the contact surface is smaller due to the arrangement of Ra0.63, the occurrence of the corrosion phenomenon of the engine balance shaft bearing is avoided, and the service life of the engine balance shaft bearing is prolonged.

To sum up, the utility model discloses a beneficial technological effect does:

1. the arrangement of the first cover plate fixed on the outer ring and the second cover plate fixed on the inner ring prevents dust from entering the inside of the engine balance shaft bearing from a gap between the inner ring and the outer ring, the first cover plate and the second cover plate are not in direct contact, so that the influence on the rotation of the engine balance shaft bearing is reduced, the service life of the engine balance shaft bearing is prolonged, the noise of the engine balance shaft bearing in the rotation process is prevented from being increased due to the fact that the dust enters the engine balance shaft bearing and is attached to the roller, and the abrasion of the roller is reduced;

2. the labyrinth design further improves the dustproof effect of the first cover plate and the second cover plate, prevents the gap inside the engine balance shaft bearing from being directly communicated with the outside, prevents dust from easily entering the bearing, and further improves the service life of the engine balance shaft bearing;

3. the problem that the lubricating degree of the roller is reduced due to leakage of lubricating grease in the engine balance shaft bearing is avoided, and the service life of the engine balance shaft bearing is prolonged.

Drawings

Fig. 1 is a cross-sectional view of the present invention.

Fig. 2 is an enlarged schematic view of a in fig. 1.

In the figure, 1, inner circle; 2. an outer ring; 3. a holder; 4. a roller; 5. a cover plate; 21. a first rolling groove; 11. a second rolling groove; 211. a first guide surface; 111. a second guide surface; 6. an oil storage region; 51. a first cover plate; 52. a second cover plate; 53. an annular projection; 54. an annular groove; 55. an annular stop block; 56. an oil retaining groove; 511. a first mounting groove; 521. a second mounting groove; 512. a first gasket; 522. a second gasket; 57. and an oil filling hole.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the engine balance shaft bearing disclosed for this embodiment includes an inner ring 1, an outer ring 2, a retainer 3, rollers 4 and a cover plate 5, where the retainer 3 is disposed between the inner ring 1 and the outer ring 2, the rollers 4 are seven, the rollers 4 are disposed on the retainer 3 and are circumferentially and uniformly disposed on the retainer 3, the cover plate 5 is disposed outside the rollers 4 and the retainer 3 and is fixedly connected with the outer ring 2 and the inner ring 1, the cover plate 5 is used to prevent dust from entering the bearing, and the number of the cover plates 5 is two, and the two cover plates are symmetrically disposed in gaps at two ends of the engine balance shaft bearing.

As shown in fig. 2, the inner side wall of the outer ring 2 is provided with a first rolling groove 21 for the rollers 4 to roll, the outer side wall of the inner ring 1 is provided with a second rolling groove 11 for the rollers 4 to roll, and both the first rolling groove 21 and the second rolling groove 11 are arc grooves attached to the rollers 4.

The first guide surface 211 is arranged at the joint of the first rolling groove 21 and the inner side wall of the outer ring 2, the second guide surface 111 is arranged at the joint of the first rolling groove 21 and the outer side wall of the inner ring 1, and the first guide surface 211 and the second guide surface 111 and the roller 4 are opposite to form the oil storage area 6, so that grease is attached to the oil storage area 6 under the action of liquid tension, and the oil storage capacity of the engine balance shaft bearing is increased.

The inner diameter of the inner ring 1 needs to be smaller than 0.008mm in circular runout, the outer diameter of the outer ring 2 needs to be smaller than 0.01mm in circular runout, and the surface roughness of the inner ring 1, the outer ring 2, the rollers 4 and the retainer 3 is Ra0.63.

As shown in fig. 2, the cover plate 5 includes a first cover plate 51 and a second cover plate 52, the first cover plate 51 is disposed on the outer side of the second cover plate 52, the inner side of the first cover plate 51 is opposite to the outer side of the second cover plate 52, two annular protrusions 53 are disposed on the inner side of the first cover plate 51, and two annular grooves 54 for the two annular protrusions 53 to penetrate are disposed on the outer side of the second cover plate 52.

It should be noted that, the first cover plate 51 and the second cover plate 52, the annular protrusion 53 and the annular groove 54 are not contacted, and a certain gap is formed between the first cover plate 51 and the second cover plate 52, the labyrinth arrangement prevents the interior of the bearing from being directly connected with the outside, external dust is not easy to fall into the engine balance shaft bearing through the gap between the first cover plate 51 and the second cover plate 52, and meanwhile, if oil in the bearing seeps out from the gap between the first cover plate 51 and the second cover plate 52, because the gap is small, grease can generate oil seal between the first cover plate 51 and the second cover plate 52, and the interior and the exterior of the engine balance shaft bearing are separated. Meanwhile, the mode that the first cover plate 51 is not contacted with the second cover plate 52 reduces the resistance generated by the arrangement of the cover plate 5 during the rotation of the engine balance shaft bearing.

As shown in fig. 2, an annular stopper 55 is integrally connected to a side of the inner side wall of the first cover plate 51 close to the outer ring 2, and the annular stopper 55 cooperates with the inner side wall of the first cover plate 51 and the inner side wall of the outer ring 2 to form an oil blocking groove 56.

As shown in fig. 2, a first mounting groove 511 for mounting the first cover plate 51 is formed in the inner side wall of the outer ring 2, a second mounting groove 521 for mounting the second cover plate 52 is formed in the outer side wall of the inner ring 1, a first gasket 512 is disposed in the first mounting groove 511 and located on the inner side of the first cover plate 51, and a second gasket 522 is disposed in the second mounting groove 521 and located on the inner side of the second cover plate 52; it should be noted that in this embodiment, the material of the second cover plate 52 and the first cover plate 51 is preferably rubber, and may also be a splicing material with 100Cr6 bearing steel inside and rubber outside, which is intended to avoid the reduction of the overall structural strength of the engine balance shaft bearing due to the excessive structure provided on the engine balance shaft bearing for the sake of installation convenience.

Due to the arrangement of the first cover plate 51 and the second cover plate 52, when oil needs to be added to the interior of the engine balance shaft bearing, it is time-consuming and labor-consuming to remove the cover plate 5 and then add oil, so that the oil injection hole 57 is formed in the first cover plate 515. The position and structure of the oil hole 57 are shown in fig. 2, the oil hole 57 penetrates through the first cover plate 51 and is communicated with the oil baffle groove 56; if oil splashes during the injection process, the ring stopper 55 and the inner side wall of the outer ring 2 serve as guides so that the oil can adhere to the first rolling grooves 21 and the rollers 4. It should be noted that the oil injection is only necessary to provide lubrication of the rollers 4, without over-injection.

The implementation principle of the embodiment is as follows:

the labyrinth arrangement between the first cover plate 51 and the second cover plate 52 avoids the direct and external communication of the inside of the engine balance shaft bearing, so that external dust is difficult to enter the bearing, the roller 4 inside the engine balance shaft bearing is effectively protected, the scratch of the roller 4 is avoided, the motion precision of the engine balance shaft bearing is ensured, and the service life of the engine balance shaft bearing is prolonged.

Meanwhile, due to the existence of a small gap between the first cover plate 55 and the second cover plate 52, when a small amount of grease in the engine balance shaft bearing enters the gap, the grease can be attached to the gap due to tension, an oil seal effect is achieved, the inside and the outside of the engine balance shaft bearing are separated, meanwhile, the annular stop block 55 further prevents the grease from seeping out, and the lubrication degree of the inner roller 4 is guaranteed.

The non-contact design of the first cover plate 51 and the second cover plate 52 also enables the first cover plate 51 and the second cover plate 52 not to contact with each other to generate friction in the rotation process of the engine balance shaft bearing, so that the self-heating of the first cover plate 51 and the second cover plate 52 is reduced, the rotation of the engine balance shaft bearing is prevented from being blocked, and the service life of the engine balance shaft bearing is prolonged.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The engine balance shaft bearing comprises an inner ring (1), an outer ring (2), a plurality of rollers (4) and a retainer (3), wherein the retainer (3) is arranged between the inner ring (1) and the outer ring (2), the rollers (4) are arranged on the retainer (3) and are circumferentially and uniformly arranged on the retainer (3), a first rolling groove (21) is formed in the inner side wall of the outer ring (2), a second rolling groove (11) is formed in the outer side wall of the inner ring (1), the first rolling groove (21) and the second rolling groove (11) are both arc grooves and are used for the rollers (4) to roll, the engine balance shaft bearing is characterized by further comprising a first cover plate (51) and a second cover plate (52), the first cover plate (51) is fixedly connected with the outer ring (2), the second cover plate (52) is fixedly connected with the inner ring (1), the inner side surface of the first cover plate (51) is provided with an annular protrusion (53), the outer side surface of the second cover plate (52) is provided with an annular groove (54) for the annular protrusion (53) to penetrate through, and a gap is formed between the first cover plate (51) and the second cover plate (52).

2. The engine balance shaft bearing of claim 1, wherein the annular protrusion (53) and the annular groove (54) are each provided in plurality.

3. The engine balance shaft bearing according to claim 1, wherein the outer ring (2) is provided with a first mounting groove (511) for clamping a first cover plate (51), and the inner ring (1) is provided with a second mounting groove (521) for clamping a second cover plate (52).

4. The engine balance shaft bearing of claim 3, wherein a first packing (512) is disposed inside the first mounting groove (511) and inside the first cover plate (51), and a second packing (522) is disposed inside the second mounting groove (521) and inside the second cover plate (52).

5. The engine balance shaft bearing according to claim 1, wherein an annular stopper (55) is integrally connected to one side of the inner side wall of the first cover plate (51) close to the outer ring (2), and the annular stopper (55) cooperates with the inner side wall of the first cover plate (51) and the inner side wall of the outer ring (2) to form an oil blocking groove (56).

6. The engine balance shaft bearing of claim 5, wherein the first cover plate (51) is provided with oil holes (57), the oil holes (57) are communicated with the oil baffle groove (56), and the oil holes (57) are provided in plurality and are arranged on the first cover plate (51) in a central symmetry manner.

7. The engine balance shaft bearing according to claim 1, wherein a junction of the first rolling groove (21) and an inner side wall of the outer ring (2) is provided with a first guide surface (211), and a junction of the first rolling groove (21) and an outer side wall of the inner ring (1) is provided with a second guide surface (111).

8. The engine balance shaft bearing according to claim 1, wherein the inner diameter of the inner ring (1) has a circular run-out of less than 0.008mm and the outer diameter of the outer ring (2) has a circular run-out of less than 0.01 mm.

9. The engine balance shaft bearing according to claim 1, wherein the surface roughness of the inner ring (1), the outer ring (2), the rollers (4) and the cage (3) are all Ra0.63.