CN217421859U

CN217421859U - Nail-sheet type plastic plane bearing

Info

Publication number: CN217421859U
Application number: CN202221543025.2U
Authority: CN
Inventors: 汤世伟; 段庆阳; 赵晖
Original assignee: Shanxi Xinhuan Precision Manufacturing Co ltd
Current assignee: Shanxi Xinhuan Precision Manufacturing Co ltd
Priority date: 2022-06-20
Filing date: 2022-06-20
Publication date: 2022-09-13
Anticipated expiration: 2032-06-20

Abstract

The utility model relates to the technical field of bearings, in particular to a nail-plate type plastic plane bearing, which comprises a bearing cover, a bearing base, an end face rotating chip and a friction plate, wherein the bearing cover, the bearing base, the end face rotating chip and the friction plate are arranged from top to bottom, an axial cavity is formed between the bearing base and the bearing cover, the end face rotating chip is arranged in the axial cavity, and a lubricant is arranged in the axial cavity; the friction plates are arranged on two sides of the end face rotating chip and are in sliding friction with the end face rotating chip, and a limiting structure for limiting the rotation of the friction plates is arranged between the friction plates and the bearing base or the bearing cover. Bearing plastics plain bearing has been surpassed on life comprehensively, almost unanimous with metal rolling bearing's life, has the impact-resistant characteristic that metal rolling bearing does not possess again simultaneously and resistant muddy water characteristic, the cost is only slightly higher than plastics plain bearing, has very high economic value.

Description

Nail-sheet type plastic plane bearing

Technical Field

The utility model relates to a bearing technical field, more specifically say, relate to a first slice formula plastics plane bearing.

Background

The existing automobile suspension bearings are mainly divided into two types, namely plastic metal composite rolling bearings and plastic plane bearings, and the two types of bearings have advantages and disadvantages respectively. The plastic metal composite rolling bearing adopts the upper and lower plastic shells to cover the metal roller path, uses a certain amount of steel balls as rolling bodies, and has the advantages of small torque, low noise, large bearing capacity and wide adaptability; the disadvantages of high cost, poor mud water adaptability, poor impact resistance and complex process; the bearing shell and the rotating chip of the plastic plane bearing are both made of plastic, and the plastic plane bearing has the advantages of low cost, stable rotation, good muddy water adaptability and impact resistance; the defects are that the torque is large, the noise is easy to generate, and the radial load is small.

Because the flat bearing has the characteristics of impact resistance and muddy water resistance, the cost is much lower than that of a rolling bearing, and a plurality of host factories prepare to replace the rolling bearing by the flat bearing, but the existing flat bearing has the defects of large torque and high noise and is difficult to meet the use requirement.

Therefore, there is a need for improvements in the prior art.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the provided plate type plastic plane bearing has the advantages of moderate torque, low noise, moderate bearing, moderate cost, stable rotation, good muddy water adaptability and good impact resistance.

In order to solve the technical problem, the utility model discloses a technical scheme be:

the utility model provides a first piece formula plastics plane bearing, includes bearing cap and the bearing pedestal that sets up from top to bottom, forms axial cavity between bearing pedestal and the bearing cap, still includes:

the end face rotating chip is arranged in the axial cavity, and a lubricant is arranged in the axial cavity;

the friction plates are arranged on two sides of the end face rotating chip and are in sliding friction with the end face rotating chip, and a limiting structure for limiting the rotation of the friction plates is arranged between the friction plates and the bearing base or the bearing cover;

in order to limit the position of the friction plate, a limiting edge is arranged on the end face formed by the bearing cover in the axial cavity, the limiting edge is circumferentially arranged along the bearing cover and forms a plurality of limiting intervals on the end face, the friction plate is arranged in the limiting intervals and has a gap with the limiting edge, so that when the bearing rotates, a lubricating agent in an oil groove is continuously extruded by the friction plate, the friction plate is brought into a space between the tetrafluoro friction plate and a chip by a rotating chip, a stable oil film is continuously formed, the abrasion of the bearing chip is reduced, the height of the friction plate is higher than that of the limiting edge, and the tetrafluoro friction plate is ensured to have sufficient abrasion loss in the life cycle of the whole bearing.

In order to improve the radial bearing capacity of the bearing, the bearing base and the bearing cover are coaxially arranged, the inner sides of the bearing base and the bearing cover extend to one side along the axis and form a radial cavity, a radial rotating chip is arranged in the radial cavity, and the radial rotating chip bears the radial force and reduces the rotating torque.

Furthermore, be provided with spacing edge on the terminal surface that is formed by the bearing base in the axial cavity, spacing edge sets up and forms a plurality of spacing intervals at the terminal surface along bearing base circumference, the friction disc sets up and has the clearance in spacing interval and with spacing edge, the friction disc height is higher than spacing edge.

In order to arrange the friction plates reasonably, the limiting edges are uniformly distributed along the circumferential direction of the bearing cover or the bearing base and divide the end face into a plurality of fan-shaped limiting intervals, the friction plates are nail-type fan-shaped friction plates which are matched with the fan-shaped limiting intervals, and lubricating grease is arranged in the limiting intervals.

In order to seal the bearing, the outer sides of the bearing cover and the bearing base extend towards the direction close to each other to form a labyrinth seal groove, and a TPU (thermoplastic polyurethane) seal ring is arranged in the labyrinth seal groove and is in line contact with the labyrinth seal groove.

Furthermore, labyrinth seal groove includes two sealing rings I that extend the formation by the bearing base outside and two sealing rings II that extend the formation in the bearing cap outside, two sealing ring I forms ring channel I, TPU sealing washer upside is provided with sealed inclined plane, and the TPU sealing washer sets up in ring channel I, and the sealed inclined plane of TPU sealing washer forms the line seal with one of them sealing ring II, makes the grease in the bearing be in relative confined environment through the TPU sealing washer, reduces the erosion of outside muddy water, the at utmost has reduced the loss of the inside lubricating grease of bearing simultaneously.

Further, the radial cavity is communicated with the axial cavity, and the axial cavity and the radial cavity are both provided with sealing structures.

Furthermore, the end face rotating chip is made of steel or PP materials.

Furthermore, the friction plate is a tetrafluoroethylene friction plate, and the friction plate is 0.15-0.25 mm higher than the limiting edge.

Compared with the prior art, the utility model beneficial effect who has does:

1. the utility model can limit the sliding position of the friction plate and can be used as the oil groove of the lubricating grease by arranging the limiting edge, when the bearing rotates in a reciprocating way, the lubricating grease in the oil groove is continuously extruded and is brought between the friction plate and the chip by the rotating chip, a stable oil film is continuously formed, and the abrasion of the bearing chip is reduced; the height of the friction plate is about 0.2mm higher than that of the seamed edge, so that the sufficient abrasion loss of the tetrafluoro friction plate is ensured in the whole life cycle of the bearing.

2. The utility model discloses install the sealing ring of TPU material on labyrinth seal groove's basis, make the grease in the bearing be in relative confined environment, reduce the erosion of outside muddy water, simultaneously the at utmost reduced the loss of the inside lubricating grease of bearing.

3. Bearing surpass plastics flat bearing on life comprehensively, almost unanimous with metal rolling bearing's life, have the impact-resistant characteristic that metal rolling bearing does not possess again simultaneously and with resistant muddy water characteristic, the cost is only slightly higher than plastics flat bearing, has very high economic value.

Drawings

The following provides a more detailed description of the present invention, as illustrated in the accompanying drawings.

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

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

FIG. 4 is a schematic view of a bearing mount structure;

FIG. 5 is a schematic diagram of the arrangement of friction plates.

In the figure: 1-bearing cover, 11-limiting edge, 12-limiting interval, 13-labyrinth seal groove, 14-TPU seal ring, 15-seal ring II, 16-seal inclined plane, 2-bearing base, 21-seal ring I, 22-annular groove I, 3-axial cavity, 4-end face rotating chip, 5-friction plate, 6-radial cavity and 7-radial rotating chip.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Example 1:

as shown in fig. 1 to 5, a nail-plate type plastic plane bearing comprises a bearing cover 1, a bearing base 2, an end face rotation chip 4 and a friction plate 5 which are arranged up and down, wherein an axial cavity 3 is formed between the bearing base 2 and the bearing cover 1 and used for placing the end face rotation chip 4.

The up end of axial cavity 3, be provided with spacing edge 11 on the terminal surface that is formed by bearing cap 1 promptly, spacing edge height can be selected to be 0.8mm, and spacing edge 11 sets up along 1 circumference of bearing cap, forms a plurality of spacing intervals 12 at the terminal surface of bearing cap 1, and spacing interval 12 is preferably fan-shaped, forms grid type track at the terminal surface, and 1 circumference equipartition of bearing cap can be followed to spacing edge 11, and quantity can set up as required, sets up two at least, preferably 12.

The friction plate 5 is of a structure matched with the limiting interval 12, the friction plate is preferably in a fan shape, the number of the friction plate 5 is equal to that of the limiting interval, the friction plate 5 is arranged in the limiting interval 12 and has a gap with the limiting edge 11, the size of the gap can be 1mm, lubricating grease is arranged in the limiting interval, when the bearing rotates in a reciprocating mode, the lubricating grease in an oil groove is continuously extruded, the lubricating grease is brought into the friction plate and the rotating chip by the end face rotating chip, a stable oil film is continuously formed, and abrasion of the rotating chip is reduced. In order to prevent the rotary chip from rubbing against the limiting edge 11, the height of the friction plate 5 is 0.15-0.25 mm higher than the end face of the limiting edge 11, and sufficient abrasion loss of the friction plate is ensured in the life cycle of the whole bearing.

The grating type track structure which is the same as the upper end face of the axial cavity 3 is arranged on the lower end face formed by the bearing base 2 in the axial cavity 3, the grating type track structure is circumferentially arranged along the bearing base 2 through the limiting edges, a plurality of limiting intervals are formed on the end face, the friction plate 5 is arranged in the limiting intervals, gaps exist between the friction plate 5 and the limiting edges, and the height of the friction plate 5 is higher than that of the limiting edges.

The end face rotating chip 4 is arranged in the axial cavity 3, the upper end face and the lower end face of the end face rotating chip 4 are in sliding friction with the friction plates, and a lubricant is filled in the axial cavity 3.

The outside of bearing cap 1 and bearing base 2 is to the direction that is close to each other extension and form labyrinth seal groove 13, labyrinth seal groove 13 includes two sealing rings I21 that extend the formation by the bearing base 2 outside and two sealing rings II 15 that extend the formation in the bearing cap 1 outside, two sealing rings I21 form ring channel I22, be provided with TPU sealing washer 14 in the ring channel I22, TPU sealing washer 14 upside is provided with sealed inclined plane 16, sealed inclined plane 16 forms line seal with one of them sealing ring II 15, make the grease in the bearing be in relative confined environment through sealed, reduce the erosion of outside muddy water, the loss of the inside lubricating grease of bearing has been reduced to the at utmost simultaneously.

The end face rotating chip 4 is made of steel rotating chips, such as 65Mn steel, and is subjected to quenching treatment, the hardness is 57HRC, the parallelism is 0.02mm, and the roughness is Ra0.2.

When the bearing requires to absorb larger impact, the middle steel rotating chip can be replaced by a modified PP material chip, the performances of the bearing such as service life durability and the like are slightly reduced, and the friction torque is larger than 30%.

The friction plate 5 can be a tetrafluoroethylene friction plate with the hardness of 4.5HB, the elongation at break of 450 percent and the friction coefficient of 0.14. The nail-type tetrafluoroethylene friction plate can reduce thermal deformation caused by friction heat, and the nail-type tetrafluoroethylene friction plate is an important technical improvement for enabling the durability and the service life of the plastic plane bearing to reach the standard. The traditional single-piece structure can cause the friction plate to warp after being heated, the heat is accumulated to generate the faults that the bearing shell is overheated and deformed, and the torque is increased sharply.

The bearing base and the bearing cover can be made of POM modified materials through an injection molding process, the hardness is 80 +/-5 HD, the elongation at break is more than or equal to 18, and the impact strength is more than or equal to 60 KJ/square meter.

Example 2:

in order to improve the radial bearing capacity of the bearing, on the basis of the bearing structure of embodiment 1, a radial rotating chip 7 may be disposed between the bearing base 2 and the bearing cap 1.

The bearing base 2 and the bearing cover 1 are coaxially arranged, the inner sides of the bearing base 2 and the bearing cover 1 extend to one side along an axis and form a radial cavity 6, the radial rotating chip 7 is arranged in the radial cavity 6, the radial rotating chip 7 can be made of pp modified materials, the hardness is 82HD, the breaking elongation is larger than or equal to 40%, the impact strength is larger than or equal to 5 KJ/square meter, an oil storage tank is designed on the inner diameter surface of the radial rotating chip 7, which is in contact with the bearing base, the upper end of the radial cavity 6 is communicated with the axial cavity 3, and the lower end of the radial cavity 6 is provided with a sealing structure.

A test sample of the plate-type plastic plane bearing is finished, 100 ten thousand endurance tests are passed, the product meets the requirements of the plane bearing test outline, and the abrasion loss of a single surface of the tetrafluoro friction plate passing the endurance tests is 0.01-0.02 mm, so that the related requirements are met. The test data are as follows:

the durability test standard is as follows: the axial load is 5000N, the rotation frequency is 1Hz, the rotation angle is +/-40 degrees, the cycle period is 100 ten thousand times, the friction torque is less than 10 N.m, and the torque is less than or equal to 8 N.m after 100 ten thousand times of rotation.

And (3) detection results: 5.2 N.m to 5.6 N.m, and the results are judged as follows: and (4) passing.

The starting torque test standard is as follows:

the axial load is 5000N, after the endurance test is finished, the moment is tested after the pressure is maintained for one minute, and the starting torque is less than or equal to 10 N.M.

And (3) detection results: 6.0 N.M to 6.5 N.M, and the results show that: and (4) passing.

Through testing, the utility model discloses compare with conventional plastics plane bearing, the moment of torsion is little, and the bearing capacity is big, and the friction torque after the endurance test amplitude of rise is only 10%. The problem that the bearing is damaged due to friction heat is thoroughly solved, heat dissipation is not required to be suspended midway, the main defects of the conventional plastic plane bearing are overcome, and the characteristics of impact resistance, muddy water resistance and high safety coefficient of the plane bearing are retained.

The above description has been made in detail only for the preferred embodiment of the present invention, but the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention within the knowledge scope of those skilled in the art, and all such changes are intended to be encompassed by the present invention.

Claims

1. The utility model provides a first piece formula plastics flat face bearing, includes bearing cap (1) and bearing base (2) that set up from top to bottom, forms axial cavity (3) between bearing base (2) and bearing cap (1), its characterized in that includes:

the end face rotating chip (4) is arranged in the axial cavity (3), and a lubricant is arranged in the axial cavity (3);

the friction plates (5) are arranged on two sides of the end face rotating chip (4) and are in sliding friction with the end face rotating chip (4), and a limiting structure for limiting the rotation of the friction plates (5) is arranged between the friction plates (5) and the bearing base (2) or the bearing cover (1);

be provided with spacing edge (11) on the terminal surface that is formed by bearing cap (1) in axial cavity (3), spacing edge (11) set up and form a plurality of spacing intervals (12) at the terminal surface along bearing cap (1) circumference, friction disc (5) set up in spacing interval (12) and have the clearance with spacing edge (11), friction disc (5) highly are higher than spacing edge (11).

2. The nail-plate type plastic plane bearing according to claim 1, wherein: the bearing base (2) and the bearing cover (1) are coaxially arranged, the inner sides of the bearing base (2) and the bearing cover (1) extend to one side along an axis and form a radial cavity (6), and a radial rotating chip (7) is arranged in the radial cavity (6).

3. The nail-plate type plastic plane bearing according to claim 1, wherein: be provided with spacing edge on the terminal surface that is formed by bearing base (2) in axial cavity (3), spacing edge sets up and forms a plurality of spacing intervals at the terminal surface along bearing base (2) circumference, friction disc (5) set up in spacing interval and with spacing edge existence clearance, friction disc (5) highly are higher than spacing edge.

4. A nail-sheet plastic flat bearing according to claim 1 or 3, characterized in that: spacing edge (11) are along the circumference equipartition of bearing cap (1) or bearing base (2) and separate the terminal surface for a plurality of fan-shaped spacing intervals, friction disc (5) are the fan-shaped friction disc that suits with fan-shaped spacing interval, spacing interval is provided with lubricating grease.

5. The nail-plate type plastic plane bearing according to claim 1, wherein: the outer sides of the bearing cover (1) and the bearing base (2) extend in the direction close to each other to form a labyrinth seal groove (13), and a TPU (thermoplastic polyurethane) seal ring (14) is arranged in the labyrinth seal groove (13) and forms line contact with the labyrinth seal groove (13).

6. The nail-plate type plastic plane bearing of claim 5, wherein: labyrinth seal groove (13) include two sealing rings I (21) that extend the formation by bearing base (2) outside and two sealing rings II (15) that extend the formation in bearing cap (1) outside, two sealing ring I (21) form ring channel I (22), TPU sealing washer (14) upside is provided with sealed inclined plane (16), and TPU sealing washer (14) set up in ring channel I (22), and sealed inclined plane (16) of TPU sealing washer (14) form the line seal with one of them sealing ring II (15).

7. The nail-plate type plastic plane bearing of claim 2, wherein: the radial cavity (6) is communicated with the axial cavity (3), and the axial cavity (3) and the radial cavity (6) are both provided with sealing structures.

8. A nail-sheet plastic flat bearing according to claim 1 or 3, characterized in that: the end face rotating chip (4) is made of steel or PP materials.

9. The nail-plate type plastic plane bearing according to claim 1, wherein: the friction plate (5) is a tetrafluoroethylene friction plate, and the friction plate (5) is 0.15-0.25 mm higher than the limiting edge.