CN210344056U

CN210344056U - Thrust damping bearing

Info

Publication number: CN210344056U
Application number: CN201921024225.5U
Authority: CN
Inventors: 葛健; 蒋岳凌
Original assignee: Changzhou Dongfeng Bearing Co ltd
Current assignee: Changzhou Dongfeng Bearing Co ltd
Priority date: 2019-07-03
Filing date: 2019-07-03
Publication date: 2020-04-17
Anticipated expiration: 2029-07-03

Abstract

The utility model discloses a thrust damping bearing belongs to bearing technical field. The utility model discloses a thrust damping bearing, including dustcoat, movable coil, damping ring, seat circle and sealing washer, the movable coil, damping ring and seat circle pressure equipment in the dustcoat in proper order, the sealing washer is located between dustcoat and the seat circle, the damping ring is equipped with the glide plane with the one side that the seat circle contacted, be equipped with on the glide plane along a plurality of oil storage holes of damping ring circumferential direction distribution, the oil storage hole comprises one-level oil storage hole and second grade oil storage hole of difference in height, the degree of depth in one-level oil storage hole is greater than the degree of depth in second grade oil storage hole, and form the boss between one-level oil storage hole and. The utility model improves the damping ring of the thrust bearing, improves the storage effect of grease, effectively prevents the grease from running off, improves the lubricating and heat-dissipating effect of the damping ring, and improves the rotation flexibility and the service life of the steering knuckle thrust bearing; and, thrust bearing assembly is simple and convenient, and the wholeness is good after the assembly.

Description

Thrust damping bearing

Technical Field

The utility model relates to a bearing, more specifically say, relate to a thrust damping bearing, especially relate to a thrust damping bearing for auto steering knuckle.

Background

The automobile steering knuckle is a component for connecting a vehicle steering wheel and a front wheel axle, is connected with a shock absorber, and is directly related to the safety performance of an automobile. The stress applied to the automobile steering knuckle is complex and concentrated in the working process, so that the requirements on the quality performances of the steering knuckle bearing, such as wear resistance, service life and the like, are high.

The knuckle thrust damping bearing is positioned between a knuckle and a front shaft of a front axle of a vehicle and used for bearing a load transmitted to the knuckle by the front shaft, a main pin hole is formed in the middle of the thrust damping bearing, and a main pin connects the front shaft and the knuckle together through the main pin hole, so that the knuckle can freely rotate relative to the front shaft, and the front wheel is guaranteed to be flexible and light to steer.

Chinese patent No. ZL201620558309.7 discloses a truck knuckle thrust bearing, which comprises a bearing outer cover, a damping ring, a thrust ring and an O-shaped sealing ring; the damping ring is pressed into the bearing outer cover; the damping ring is relatively fixed with the bearing outer cover; the thrust ring is pressed into the bearing outer cover; the thrust ring and the damping ring rotate relatively; a main pin hole is formed in the bearing outer cover; the main pin hole is communicated with the inner diameter of the damping ring and the inner diameter of the thrust ring; an O-shaped sealing ring is arranged between the main pin hole of the bearing outer cover and the inner diameter of the damping ring. This patent application mainly to current knuckle thrust bearing's the sealing performance relatively poor, get into the dust easily in the bearing and lead to bearing rotation flexibility and the problem that life descends, has solved knuckle thrust bearing's dustproof problem to a certain extent, but its assembly structure is comparatively complicated, and thrust collar and special-shaped oil blanket are difficult to be connected with the bearing housing and form a whole. And the damping ring is a common damping ring, the sliding performance between the damping ring and the thrust ring is poor, and the rotation flexibility and the service life are still to be further improved.

The Chinese patent No. ZL201720466217.0 further provides an improvement scheme on the basis of the sealing scheme of the patent application, and comprises a shell, a fixed ring and a movable ring which are coaxially arranged in the shell from top to bottom, and a small sealing ring is clamped on the inner wall of a shaft hole of the fixed ring; the shell is of a cylindrical structure with a large upper part and a small lower part, and the lower end of the shell is inserted into a main pin hole of the steering knuckle and is sealed by a large sealing ring; the last border cover of shell is equipped with annular oil blanket, and annular oil blanket is the U-shaped ring cover, and the inside wall of annular oil blanket is closely filled up and is established between shell and stationary ring, and the top of annular oil blanket is equipped with the ring channel assorted seal lip with front axle connecting portion lower terminal surface, and the seal lip can block into the ring channel of front axle connecting portion lower terminal surface through shifting up of annular oil blanket and seal. The application mainly aims at the problem that the sealing capability of the lower end of the patent ZL201620558309.7 is limited, but the structural design is complex, and the bearing assembly process is complicated; in addition, the friction coefficient is reduced only by two annular friction plates, and the rotation flexibility and the service life still need to be further improved.

The research shows that at present, the technical personnel in the field mainly improve the dustproof sealing structure of the existing steering knuckle thrust bearing, but the attention on the assembly structure design and the self-lubricating structure of the steering knuckle thrust bearing is less, and the conventional structure design is still adopted, so that the rotation flexibility and the service life of the steering knuckle thrust bearing are required to be improved.

Disclosure of Invention

1. Technical problem to be solved by the utility model

The utility model aims to overcome the defects of the existing steering knuckle thrust bearing, and provides a thrust damping bearing, which adopts the technical scheme of the utility model, and improves the damping ring of the thrust bearing, and two-stage oil storage pits with different heights are arranged on the sliding surface of the damping ring, thereby improving the storage effect of grease, effectively preventing the grease from running off, improving the lubricating and heat-dissipating effect of the damping ring, and improving the rotation flexibility and the service life of the steering knuckle thrust bearing; and, the sealing washer between dustcoat and the seat circle passes through turn-ups and step structure pressure equipment inside the dustcoat, has improved dustproof effect, and thrust bearing assembles simple and conveniently, and the wholeness is good after the assembly.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a thrust damping bearing, including dustcoat, movable coil, damping ring, seat circle and sealing washer, movable coil, damping ring and seat circle pressure equipment in the dustcoat in proper order, the sealing washer locate between dustcoat and the seat circle, the damping ring be equipped with the glide plane with the one side that the seat circle contacted, the glide plane on be equipped with along a plurality of oil storage holes that damping ring week distributes, the oil storage hole constitute by the one-level oil storage hole of difference in height and second grade oil storage hole, the degree of depth that the one-level oil storage hole was greater than the degree of depth that the second grade oil storage was bored, and form the boss between one-level oil storage hole and second grade oil storage hole.

Furthermore, the oil storage pit at least has two openings facing to opposite directions in shape, the openings in the same direction are positioned on the same circumference along the clockwise direction or the anticlockwise direction, and the openings facing to opposite directions are positioned on the inner circumference and the outer circumference respectively.

Furthermore, at least two circles of oil storage pits which are distributed along the circumferential direction and are of V-shaped structures are arranged on the sliding surface, the opening directions of the oil storage pits in the same circle are the same, the opening directions of the oil storage pits in the same circle are arranged along the circumferential direction, and the opening directions of the oil storage pits in adjacent circles are opposite.

Furthermore, the sliding surface is also provided with a plurality of grease channels which radially penetrate through the damping ring, and the plurality of grease channels are uniformly arranged on the sliding surface along the circumference of the damping ring.

Furthermore, two sides of the lubricating grease channel are provided with chamfer slopes along the length direction.

Furthermore, one end of the outer cover is provided with an inward flange, one end of the seat ring is provided with a step, the seat ring is arranged in the outer cover, a sealing ring mounting space is formed between the inward flange of the outer cover and the step of the seat ring, and the sealing ring is mounted in the sealing ring mounting space.

Furthermore, the end face of one end of the seat ring, which is far away from the step, protrudes out of the inward flanging plane of the outer cover.

Furthermore, the outer side wall of the moving coil is in interference press-fitting connection with an inner hole at one end of the outer cover.

Furthermore, the sealing ring comprises a framework and a sealing main body wrapped on the framework, and at least two sealing lips are arranged on the outer side of the sealing main body.

Furthermore, the framework is made of a cold-rolled carbon steel sheet, and the sealing main body is made of nitrile rubber.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with existing well-known technique, have following beneficial effect:

(1) the utility model discloses a thrust damping bearing, it includes dustcoat, movable coil, damping ring, seat circle and sealing washer, the one side that damping ring and seat circle contacted is equipped with the glide plane, is equipped with a plurality of oil storage holes along damping ring circumferential direction distribution on the glide plane, the oil storage hole comprises first-order oil storage hole and second grade oil storage hole of difference in height, the degree of depth in first-order oil storage hole is greater than the degree of depth in second grade oil storage hole, and form the boss between first-order oil storage hole and second grade oil storage hole; by improving the damping ring of the thrust bearing and arranging two-stage oil storage pits with different heights on the sliding surface of the damping ring, the storage effect of grease is improved, the grease loss is effectively prevented, the lubricating and heat-dissipating effects of the damping ring are improved, the rotation flexibility of the knuckle thrust bearing is improved, and the service life of the knuckle thrust bearing is prolonged;

(2) the utility model discloses a thrust damping bearing, its oil storage hole has two opposite orientation openings at least in shape, and the opening of same direction is located same circumference along clockwise or anticlockwise direction, the opposite orientation opening is located two inside and outside circumferences respectively, adopt the opposite orientation two circles oil storage hole design, guaranteed that thrust damping bearing can all receive good lubrication when positive and negative two directions rotate, improved the suitability of thrust damping bearing in the complicated atress environment of knuckle, further improved the rotation flexibility and the life of knuckle thrust bearing;

(3) the utility model discloses a thrust damping bearing, still be equipped with the lubricating grease passageway that radially runs through the damping ring on its glide plane, the lubricating grease passageway is evenly equipped with many along damping ring circumference on the glide plane, and be equipped with the chamfer inclined plane along length direction in the both sides of lubricating grease passageway, has made things convenient for the filling of lubricating grease on the one hand, on the other hand also is favorable to discharging the filth through the lubricating grease passageway, alleviates the wearing and tearing of damping ring;

(4) the utility model discloses a thrust damping bearing, the one end of its dustcoat has the inside flanging, the one end of seat circle has the step, the seat circle is located in the dustcoat, and form the sealing washer installation space between the inside flanging of dustcoat and the step of seat circle, the sealing washer is installed in above-mentioned sealing washer installation space, the seat circle is kept away from the inside flanging plane of the one end terminal surface protrusion dustcoat of step, the sealing washer is located inside the dustcoat, has improved dustproof effect, and has reduced the wearing and tearing of sealing washer; the thrust damping bearing is simple and convenient to assemble, and has good integrity after assembly;

(5) the utility model discloses a thrust damping bearing, its sealing washer include skeleton and the sealed main part of parcel on the skeleton, and the outside of sealed main part has at least twice seal lip, utilizes twice seal lip to improve the dustproof effect of sealing washer, utilizes the skeleton to strengthen the rigidity of sealing washer, has prevented that the sealing washer from warping the inefficacy.

Drawings

Fig. 1 is a schematic cross-sectional structural view of a thrust damping bearing according to the present invention;

fig. 2 is a schematic structural diagram of a damping ring according to the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

fig. 4 is a schematic cross-sectional structure diagram of the sealing ring of the present invention.

The reference numerals in the schematic drawings illustrate:

1. a housing; 1-1, inward flanging; 2. moving coils; 3. a damping ring; 3-1, sliding surface; 3-2, a grease channel; 3-3, oil storage pit; 3-3a, a first-level oil storage pit; 3-3b, a secondary oil storage pit; 4. a seat ring; 4-1, a step; 5. a seal ring; 5-1, a framework; 5-2, sealing the main body; 5-2a, a first sealing lip; 5-2b, a second sealing lip.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

Examples

Referring to fig. 1, 2 and 3, the thrust damping bearing of the present embodiment includes an outer cover 1, a moving coil 2, a damping ring 3, a seat ring 4 and a seal ring 5, where the moving coil 2, the damping ring 3 and the seat ring 4 are all ring-shaped, and have a main pin hole inside, the outer cover 1 is cylindrical, the moving coil 2, the damping ring 3 and the seat ring 4 are sequentially press-fitted in the outer cover 1, and the damping ring 3 is sandwiched between the moving coil 2 and the seat ring 4, and plays a role of lubrication when the moving coil 2 and the seat ring 4 rotate relatively; the sealing ring 5 is arranged between the outer cover 1 and the seat ring 4 and used for sealing a fit clearance between the seat ring 4 and the outer cover 1 and preventing dust from entering. The side, which is in contact with the seat ring 4, of the damping ring 3 is provided with a sliding surface 3-1, the sliding surface 3-1 is provided with a plurality of oil storage pits 3-3 which are distributed along the circumferential direction of the damping ring 3, each oil storage pit 3-3 consists of a first-level oil storage pit 3-3a and a second-level oil storage pit 3-3b which are different in height, the depth of the first-level oil storage pit 3-3a is larger than that of the second-level oil storage pit 3-3b, and a boss is formed between the first-level oil storage pit 3-3a and the second-level oil storage. The depth of the first-stage oil sump 3-3a and the second-stage oil sump 3-3b is the distance from the bottom of the oil sump to the sliding surface 3-1. In this embodiment, the height difference between the bottom of the first-stage oil sump 3-3a and the boss is preferably 0.15mm to 0.25mm, and the height difference between the boss surface and the sliding surface 3-1 is also preferably 0.15mm to 0.25 mm. The two-stage oil storage pits with different heights are arranged on the sliding surface 3-1 of the damping ring 3, so that the storage effect of grease is improved, the grease loss is effectively prevented, the lubricating and heat-radiating effect of the damping ring is improved, the rotation flexibility of the steering knuckle thrust bearing is improved, and the service life of the steering knuckle thrust bearing is prolonged.

As shown in fig. 2, in this embodiment, the oil sump 3-3 has at least two openings facing opposite directions in shape, and the openings facing the same direction are located on the same circumference in the clockwise or counterclockwise direction, and the openings facing opposite directions are located on the inner and outer circumferences, respectively. The oil storage pits 3-3 can be in an S shape or a Z shape and have two openings with opposite directions, and the design of the oil storage pits with opposite directions of the openings ensures that the thrust damping bearing can be well lubricated when rotating in the positive direction and the negative direction, improves the applicability of the thrust damping bearing in the complex stress environment of the steering knuckle, and further improves the rotation flexibility and the service life of the thrust bearing of the steering knuckle. As a preferred embodiment, at least two circles of oil sumps 3-3 distributed along the circumferential direction and in a V-shaped structure are arranged on the sliding surface 3-1, the opening directions of the oil sumps 3-3 in the same circle are the same and are arranged along the circumferential direction, and the opening directions of the oil sumps 3-3 in the adjacent circles are opposite. Namely, each oil storage pit 3-3 is V-shaped, the opening of the oil storage pit 3-3 positioned on the inner ring is arranged along the clockwise or anticlockwise direction, the opening of the oil storage pit 3-3 positioned on the outer ring is arranged along the opposite direction and is arranged in the opposite direction and the opposite circumference, so that at least two circles of oil storage pit groups with opposite rotating trends are arranged on the sliding surface 3-1 of the damping ring 3, and the thrust damping bearing is ensured to have good lubricating effect in the positive and negative directions. In addition, the sliding surface 3-1 is also provided with a plurality of grease channels 3-2 which radially penetrate through the damping ring 3, the plurality of grease channels 3-2 are uniformly arranged on the sliding surface 3-1 along the circumferential direction of the damping ring 3, for example, 4 grease channels 3-2 are preferably arranged in fig. 2, and chamfer slopes are arranged on two sides of the grease channel 3-2 along the length direction, so that on one hand, the filling of grease is facilitated, on the other hand, the dirt is discharged through the grease channel, and the abrasion of the damping ring is reduced. The contact surface of the damping ring 3 and the moving coil 2 can be a plane, and of course, an oil storage pit structure can be arranged on the contact surface to improve the lubricating performance of the contact surface.

Returning to fig. 1, in the thrust damping bearing of the present embodiment, one end of the outer cover 1 has an inward flange 1-1, one end of the seat ring 4 has a step 4-1, an outer diameter of the step 4-1 is slightly smaller than an inner diameter of the outer cover 1, an outer diameter of a lower portion of the seat ring 4 is slightly smaller than the inner diameter of the inward flange 1-1, the seat ring 4 is disposed in the outer cover 1, a seal ring mounting space is formed between the inward flange 1-1 of the outer cover 1 and the step 4-1 of the seat ring 4, and the seal ring 5 is mounted in the seal ring mounting space to prevent dust from entering the thrust damping bearing from a fit gap between the outer cover 1 and the seat. In addition, the end face of one end of the seat ring 4, which is far away from the step 4-1, protrudes out of the plane of the inward flange 1-1 of the outer cover 1, so that the seat ring 4 can be stably matched with the steering wheel, and the sealing ring 5 is arranged inside the outer cover 1, so that the dustproof effect is improved, and the abrasion of the sealing ring 5 is reduced. The outer side wall of the moving coil 2 is connected with the inner hole at one end of the outer cover 1 in an interference press-fitting mode, and by adopting the assembly structure, the thrust damping bearing is simple and convenient to assemble, and is good in integrity after assembly. The sealing ring 5 comprises a framework 5-1 and a sealing body 5-2 wrapped on the framework 5-1, wherein at least two sealing lips are arranged on the outer side of the sealing body 5-2, the framework 5-1 is preferably made of a cold-rolled carbon steel sheet, and the sealing body 5-2 is preferably made of nitrile rubber. The dustproof effect of the sealing ring 5 is improved by utilizing the two sealing lips, the rigidity of the sealing ring 5 is enhanced by utilizing the framework 5-1, and the deformation and failure of the sealing ring are prevented. Lubricating grease is also arranged at two sealing lips of the sealing ring 5.

Referring to fig. 1, in the thrust damping bearing of the present embodiment, during assembly, the seal ring 5 is mounted on the seat ring 4, and the seal ring 5 abuts against the step 4-1 of the seat ring 4, then the seat ring 4 is pressed into the outer cover 1, so that one end of the seat ring 4 away from the step 4-1 extends out of the plane of the inward flange 1-1 of the outer cover 1, at this time, the first seal lip 5-2a and the second seal lip 5-2b of the seal ring 5 are tightly attached to the inner wall of the outer cover 1, and the lower portion of the seal ring 5 is attached to the inward flange 1-1, thereby achieving the sealing between the outer cover 1 and the seat ring 4. Then the damping ring 3 is arranged in the outer cover 1, so that the sliding surface 3-1 of the damping ring 3 is in sliding fit with the seat ring 4, and lubricating grease is arranged on the sliding surface 3-1. And finally, the moving coil 2 is pressed in the outer cover 1, so that the moving coil 2 and the outer cover 1 are in interference fit, and the fixed connection between the moving coil and the outer cover is realized.

The thrust damping bearing of the utility model improves the damping ring of the thrust bearing, and the two-stage oil storage pits with different heights are arranged on the sliding surface of the damping ring, thereby improving the storage effect of grease, effectively preventing the grease from running off, improving the lubricating and heat dissipating effects of the damping ring, and improving the rotation flexibility and the service life of the steering knuckle thrust bearing; and, the sealing washer between dustcoat and the seat circle passes through turn-ups and step structure pressure equipment inside the dustcoat, has improved dustproof effect, and thrust bearing assembles simple and conveniently, and the wholeness is good after the assembly.

The present invention and its embodiments have been described above schematically, and the description is not intended to be limiting, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without creatively designing the similar structural modes and embodiments to the technical solutions, they should belong to the protection scope of the present invention.

Claims

1. The utility model provides a thrust damping bearing, includes dustcoat (1), movable coil (2), damping ring (3), seat circle (4) and sealing washer (5), movable coil (2), damping ring (3) and seat circle (4) pressure equipment in dustcoat (1) in proper order, sealing washer (5) locate between dustcoat (1) and seat circle (4), its characterized in that: damping ring (3) and the one side that seat circle (4) contacted be equipped with glide plane (3-1), glide plane (3-1) on be equipped with along a plurality of oil storage pits (3-3) that damping ring (3) circumference distributes, oil storage pit (3-3) constitute by one-level oil storage pit (3-3a) and second grade oil storage pit (3-3b) of difference in height, the degree of depth of one-level oil storage pit (3-3a) be greater than the degree of depth of second grade oil storage pit (3-3b), and form the boss between one-level oil storage pit (3-3a) and second grade oil storage pit (3-3 b).

2. A thrust damping bearing as set forth in claim 1 wherein: the oil storage pit (3-3) is at least provided with two openings facing opposite directions in shape, the openings in the same direction are positioned on the same circumference along the clockwise direction or the anticlockwise direction, and the openings facing opposite directions are respectively positioned on the inner circumference and the outer circumference.

3. A thrust damping bearing according to claim 2, wherein: the sliding surface (3-1) is provided with at least two circles of oil storage pits (3-3) which are distributed along the circumferential direction and are of V-shaped structures, the opening directions of the oil storage pits (3-3) of the same circle are the same and are arranged along the circumferential direction, and the opening directions of the oil storage pits (3-3) of adjacent circles are opposite.

4. A thrust damping bearing according to claim 3, wherein: the sliding surface (3-1) is also provided with a lubricating grease channel (3-2) which radially penetrates through the damping ring (3), and the lubricating grease channel (3-2) is uniformly provided with a plurality of lubricating grease channels on the sliding surface (3-1) along the circumferential direction of the damping ring (3).

5. A thrust damping bearing according to claim 4, wherein: chamfer inclined planes are arranged on two sides of the lubricating grease channel (3-2) along the length direction.

6. A thrust damping bearing according to any one of claims 1 to 5, wherein: one end of the outer cover (1) is provided with an inward flange (1-1), one end of the seat ring (4) is provided with a step (4-1), the seat ring (4) is arranged in the outer cover (1), a sealing ring mounting space is formed between the inward flange (1-1) of the outer cover (1) and the step (4-1) of the seat ring (4), and the sealing ring (5) is mounted in the sealing ring mounting space.

7. A thrust damping bearing according to claim 6, wherein: the end face of one end of the seat ring (4) far away from the step (4-1) protrudes out of the plane of the inward flanging (1-1) of the outer cover (1).

8. A thrust damping bearing according to claim 7, wherein: the outer side wall of the moving coil (2) is in interference press-fitting connection with an inner hole at one end of the outer cover (1).

9. A thrust damping bearing according to claim 8, wherein: the sealing ring (5) comprises a framework (5-1) and a sealing main body (5-2) wrapped on the framework (5-1), and the outer side of the sealing main body (5-2) is provided with at least two sealing lips.

10. A thrust damping bearing according to claim 9, wherein: the framework (5-1) is made of a cold-rolled carbon steel sheet, and the sealing main body (5-2) is made of nitrile rubber.