CN112324814A - Wet friction plate with novel friction material groove - Google Patents

Abstract

The invention discloses a wet friction plate with a novel friction material groove type, which comprises a metal chip and a plurality of shovel-type friction blocks, wherein the shovel-type friction blocks are annularly adhered to the upper surface and the lower surface of the metal chip, the metal chip is also provided with the friction material blocks, the shovel-type friction blocks comprise a first shovel-type friction block and a second shovel-type friction block, the first shovel-type friction block is obliquely arranged on the metal chip through a first tangential angle, and the first shovel-type friction block and the second shovel-type friction block are symmetrically arranged at two ends of the friction material block. The shovel-type friction block is additionally arranged, so that friction heat can be taken away more quickly by cooling lubricating oil, the service life of the shovel-type friction block is prolonged, the dragging torque is reduced, the original shovel-type friction blocks are symmetrically arranged on two sides of the friction block, more lubricating oil can flow through the surface of the shovel-type friction block to improve the friction performance, and the shovel-type friction block are combined to achieve the balance effect in all aspects and improve the NVH performance.

Description

Wet friction plate with novel friction material groove

Technical Field

The invention relates to the field of wet friction plates, in particular to a wet friction plate with a novel friction material groove type.

Background

In current automotive powertrain systems, the clutch occupies an increasingly important position, which entails transmitting (sending commands to the clutch via accelerator pedal conditions, vehicle speed, current gear information, etc.) a power source (torque and rotational speed) such as an engine or an electric motor to the wheels of the vehicle to drive the vehicle forward, either by engagement (including lugging) or disengagement of the clutch. Among them, through the examination of market excellence and decline over the years, the wet clutch is more and more popular with customers, and is widely used in a stepped automatic transmission with a hydraulic torque converter, a stepped automatic transmission without a hydraulic torque converter, a stepless automatic transmission with a hydraulic torque converter, a stepless automatic transmission without a hydraulic torque converter, a semiautomatic transmission, a wet dual clutch transmission, a single-speed special hybrid transmission, a multi-speed special hybrid transmission, a hybrid P2 structure, a multi-speed pure electric vehicle transmission, and the like (including but not limited to the above).

The friction plate has the key characteristics that friction materials such as powder metallurgy materials, carbon-based materials, paper-based materials, non-woven fabrics materials and the like (including the materials but not limited to the materials) which are bonded on a metal chip of the friction plate in the wet clutch (the friction materials are bonded on the metal chip by special glue) can transmit torque under the mutual matching of lubricating oil, and the friction plate has the key characteristics of good heat resistance, good durability, small space, light weight, small inertia, high efficiency, large torque transmission range, NVH (noise vibration and harshness) improvement and the like, so the friction plate is more and more popular with customers in the market.

Among many factors, the groove design of the friction material plays a key role, and especially plays an important role in heat resistance, durability and improvement of NVH (noise vibration and harshness). In the prior art, friction materials are arranged on a metal chip in an inclined annular mode along a rotation direction, and the design can reduce heat energy generated by friction, but has a large influence on the service life of the friction materials, and the NVH performance of the friction materials is limited.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the utility model provides a novel wet friction piece changes the flow direction of cooling lubricating oil through setting up specific friction piece cell type, can also take away the heat energy that the friction produced when can improve the frictional behavior of cooling lubricating oil on the friction piece.

The technical scheme adopted by the invention for solving the problems is as follows: the utility model provides a wet-type friction disc with novel friction material cell type, includes metal chip and a plurality of shovel type clutch blocks, and is a plurality of shovel type clutch blocks annular bonding is on metal chip's upper and lower two sides, its characterized in that: still be equipped with the friction material piece on the metal chip, shovel type clutch blocks includes first shovel type clutch block and second shovel type clutch block, first shovel type clutch block sets up on the metal chip through first tangential angle slope, first shovel type clutch block and second shovel type clutch block symmetry set up in friction material piece both ends.

Compared with the prior art, the invention has the advantages that: through adding the friction material piece of establishing, be favorable to cooling lubricating oil faster taking away the frictional heat to improve the life of shovel type clutch blocks, reduce and pull the moment, simultaneously with shovel type clutch blocks symmetry setting originally in friction material piece both sides, be favorable to cooling more the flowing through shovel type clutch blocks surface of lubricating oil, play the effect that improves frictional behavior, combine these two, make each side reach balanced effect, and improve the NVH performance.

Preferably, at least one first shovel-type friction block forms a first unit, at least one second shovel-type friction block forms a second unit, the friction material blocks comprise a first friction material block arranged on the periphery of the metal chip and a second friction material block arranged on the inner ring of the metal chip, the first unit and the second unit are symmetrically arranged at two ends of the first friction material block, the second friction material block is arranged on one side, far away from the first friction material block, of the first unit, the second unit, the first friction material block and the second friction material block form a third unit, and at least two third units are arranged on the metal chip. Therefore, the third units are circularly arranged on the metal chip in an array mode, and the balance of the friction performance of the whole friction plate in all directions is facilitated.

Preferably, a first groove is formed between the first friction material block and the adjacent first shovel friction block, a second groove is formed between the first friction material block and the adjacent second shovel friction block, a third groove is formed between the second friction material block and the adjacent second shovel friction block, and a fourth groove is formed between the second friction material block and the adjacent first shovel friction block.

Preferably, the groove widths of the first groove, the second groove, the third groove and the fourth groove are all between 1.2 and 2.5 mm.

Preferably, the first friction material block is a first triangular friction material block, and the second friction material block is a second triangular friction material block; and a fifth groove is formed between the first shovel-type friction block and the second shovel-type friction block which are adjacent to each other on the left and right sides of the first triangular friction material block, and a sixth groove is formed between the first shovel-type friction block and the second shovel-type friction block which are adjacent to each other on the left and right sides of the second triangular friction material block.

Preferably, the groove width of the fifth groove and the groove width of the sixth groove are both twice that of the first groove.

Preferably, the first friction material block is a first trapezoidal friction material block, and the second friction material block is a second trapezoidal friction material block.

Preferably, the first trapezoidal friction material block comprises a first trapezoidal block and a second trapezoidal block, a seventh groove is formed between the first trapezoidal block and the second trapezoidal block, the second trapezoidal friction material block comprises a third trapezoidal block and a fourth trapezoidal block, and an eighth groove is formed between the third trapezoidal block and the fourth trapezoidal block.

Preferably, the groove width of the seventh groove and the groove width of the eighth groove are both between 1.2 and 2.5 mm. Thus, the cooling lubricant flows out to the outside of the friction plate by centrifugal force to play a role of cooling and lubricating, or the cooling lubricant flows more on the surface of the friction plate to increase the friction characteristic.

Preferably, a plurality of spline teeth are arranged on the inner circumferential surface of the metal chip. Thus, the whole friction plate is convenient to fix.

Drawings

FIG. 1 is a front elevational view of an embodiment of a wet friction plate of the present invention having a novel friction material groove type;

FIG. 2 is a schematic flow diagram of a lubricating oil for an embodiment of a wet friction plate with a novel friction material groove of the present invention;

FIG. 3 is a front view of a second embodiment of a wet friction plate of the present invention having a novel friction material groove pattern;

FIG. 4 is a schematic flow diagram of the second embodiment of the lubricant for a wet friction plate with a novel friction material groove of the present invention.

The reference numbers in the figures illustrate: 1. the metal chip comprises a metal chip, 2, a shovel-type friction block, 21, a first shovel-type friction block, 22, a second shovel-type friction block, 3, a friction material block, 31, a first friction material block, 311, a first groove, 312, a second groove, 313, a fifth groove, 32, a second friction material block, 321, a third groove, 322, a fourth groove, 323, a sixth groove, 33, a first trapezoid block, 331, a seventh groove, 34, a second trapezoid block, 35, a third trapezoid block, 351, an eighth groove, 36, a fourth trapezoid block, 4, a first unit, 5, a second unit, 6, a third unit, 7, a spline tooth, 8 and a shovel-type friction block groove.

Detailed Description

Embodiments of the present invention are further described below with reference to the accompanying drawings.

Example one

As shown in fig. 1-2, the present embodiment relates to a wet friction plate with a novel friction material groove, which includes a metal core plate 1 and a plurality of shovel friction blocks 2, wherein the shovel friction blocks 2 are annularly adhered to the upper and lower surfaces of the metal core plate 1. A shovel-shaped friction block groove 8 is formed between every two adjacent shovel-shaped friction blocks 2. In this process, the spade-type friction block 2 is adhered to the metal core plate 1 by glue.

In the actual use process, the arc length of the inner diameter of the shovel-shaped friction block 2 is smaller than that of the outer diameter of the shovel-shaped friction block 2. The whole friction plate is of a circular ring structure, and in order to keep the width of the whole shovel-type friction block groove 8 consistent, the length of an arc formed by the inner diameter of the shovel-type friction block 2 needs to be designed to be smaller than the length of an arc formed by the outer diameter of the shovel-type friction block 2, so that the temperature of cooling lubricating oil is not changed due to the fact that the width of the shovel-type friction block groove 8 is inconsistent.

Wherein, the length of the arc of the inner diameter of the shovel-type friction block 2 is between 30 and 250mm, and the length of the arc of the outer diameter of the shovel-type friction block 2 is between 30 and 250 mm. The groove width of the shovel-shaped friction block groove is 1.2-2.5 mm. The cooling lubricating oil flows out to the outer side of the friction plate through centrifugal force to play a role in cooling and lubricating, or the cooling lubricating oil flows more on the surface of the friction plate to increase the friction characteristic.

In this embodiment, the metal chip 1 is further provided with a friction material block 3, and the shovel-type friction block 2 includes a first shovel-type friction block 21 and a second shovel-type friction block 22. The first shovel-type friction block 21 is obliquely arranged on the metal chip 1 through a first tangential angle alpha 1, and the first shovel-type friction block 21 and the second shovel-type friction block 22 are symmetrically arranged at two ends of the friction material block 3. In this way, due to the symmetrical arrangement, the second shovel friction block 21 is also obliquely arranged on the metal chip 1 through the second tangential angle α 2, and the angle values of the first tangential angle α 1 and the second tangential angle α 2 are the same.

The first tangential angle α 1 is an included angle between the shovel-shaped friction block 21 and the longitudinal axis of the metal chip 1, and the first tangential angle α 1 is between 0.01 degrees and 89.99 degrees. The cooling lubricating oil can flow out of the friction plate by centrifugal force under the rotation action of the friction plate, and the cooling and lubricating effects are achieved.

In this embodiment, through adding the friction material piece 3 of establishing, be favorable to cooling lubricating oil faster taking away frictional heat to improve shovel type friction block 2's life, reduce and pull the moment. Simultaneously with 2 symmetries settings in 3 both sides of friction material piece of shovel type clutch blocks originally, be favorable to cooling more the 2 surfaces of the shovel type clutch blocks that flow through of lubricating oil, play the effect that improves frictional behavior, combine these two for each side reaches balanced effect, and improves NVH performance.

The first unit 4 is formed by at least one first spade friction block 21 and the second unit 5 is formed by at least one second spade friction block 22. Since the first shovel friction block 21 and the second shovel friction block 22 are symmetrically arranged, the first unit 4 and the second unit 5 are also symmetrically arranged. The first unit 4 and the second unit 5 are a small set of spade type friction blocks.

In the embodiment, the friction material block 3 comprises a first friction material block 31 arranged at the periphery of the metal chip 1 and a second friction material block 32 arranged at the inner ring of the metal chip 1, the first unit 4 and the second unit 5 are symmetrically arranged at two ends of the first friction material block 31, and the second friction material block 32 is arranged at one side of the first unit 4 far away from the first friction material block 31.

The first unit 4, the second unit 5, the first friction material block 31 and the second friction material block 32 form a third unit 6, and at least two third units 6 are annularly arranged on the metal chip 1. A plurality of third units 6 are circularly arranged on the metal chip 1 in an array mode, and the balance of the friction performance of the whole friction plate in all directions is facilitated.

In the present embodiment, a first groove 311 is formed between the first friction material block 31 and the adjacent first shovel friction block 21, a second groove 312 is formed between the first friction material block 31 and the adjacent second shovel friction block 22, a third groove 321 is formed between the second friction material block 32 and the adjacent second shovel friction block 22, and a fourth groove 322 is formed between the second friction material block 32 and the adjacent first shovel friction block 21.

The first groove 311, the second groove 312, the third groove 321 and the fourth groove 322 are oil inlet groove types, and the groove widths of the first groove 311, the second groove 312, the third groove 321 and the fourth groove 322 are all between 1.2 mm and 2.5 mm.

The structure of the friction material block 31 may be various, and in the present embodiment, the friction material block 31 is a triangular friction material block. The first friction material block 31 is a first triangular friction material block, and the second friction material block 32 is a second triangular friction material block; a fifth groove 313 is formed between the first shovel friction block 21 and the second shovel friction block 22 adjacent to the left and right of the first triangular friction material block, and a sixth groove 323 is formed between the first shovel friction block 21 and the second shovel friction block 22 adjacent to the left and right of the second triangular friction material block.

The fifth groove 313 and the sixth groove 323 are both oil outlet groove types, and the groove widths of the fifth groove 313 and the sixth groove 323 are both twice of the groove width of the first groove 311. The design of this width makes things convenient for cooling lubricating oil to flow out to the friction disc outside through centrifugal force, plays the cooling lubrication effect.

In the present embodiment, the metal core 1 has a plurality of spline teeth 5 on its inner circumferential surface. The friction plate is connected with the inner hub and the outer hub of the clutch spline through spline teeth 5 and has friction action with a matching steel sheet so as to transmit torque to transmit the torque and the rotating speed of an engine to a gearbox and finally to transmit the torque and the rotating speed to a wheel to drive the wheel to move forwards or backwards.

Example two

As shown in fig. 3 to 4, the structure of the present embodiment is substantially the same as that of the first embodiment, except that the first friction material blocks 31 are first trapezoidal friction material blocks, and the second friction material blocks 32 are second trapezoidal friction material blocks.

Wherein, the first trapezoid friction material block comprises a first trapezoid 33 and a second trapezoid 34, a seventh groove 331 is formed between the first trapezoid 33 and the second trapezoid 34, the second trapezoid friction material block comprises a third trapezoid 35 and a fourth trapezoid 36, and an eighth groove 351 is formed between the third trapezoid 35 and the fourth trapezoid 36.

The groove widths of seventh and eighth grooves 331 and 351 are each between 1.2-2.5 mm. The seventh groove 331 and the eighth groove 351 can be in the shape of an oil inlet groove or an oil outlet groove.

In this embodiment, the first trapezoidal friction material block may be a unitary trapezoidal block without being split into the first trapezoidal block 33 and the second trapezoidal block 34. The same arrangement can be made for the second trapezoidal friction material block.

The invention has the beneficial effects that: through adding the friction disc indent in the opposite direction of establishing along friction disc direction of rotation, be favorable to cooling lubricating oil faster taking away the frictional heat to improve the life of shovel type clutch blocks, reduce and pull the moment, friction disc indent and shovel type clutch blocks recess overlap setting simultaneously, be favorable to more flowing through of cooling lubricating oil shovel type clutch blocks surface, play the effect that improves frictional behavior, combine these both, make each side reach balanced effect, and improve the NVH performance.

The foregoing description shows and describes several preferred embodiments of the invention, but as aforementioned, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. The utility model provides a wet friction disc with novel friction material cell type, includes metal chip (1) and a plurality of shovel type clutch blocks (2), and is a plurality of shovel type clutch blocks (2) annular adhesion is on the upper and lower two sides of metal chip (1), its characterized in that: still be equipped with the clutch blocks (3) on metal chip (1), shovel type clutch blocks (2) include first shovel type clutch blocks (21) and second shovel type clutch blocks (22), first shovel type clutch blocks (21) set up on metal chip (1) through first tangential angle slope, first shovel type clutch blocks (21) and second shovel type clutch blocks (22) symmetry set up in clutch blocks (3) both ends.

2. A wet friction plate of new friction material groove type as claimed in claim 1, wherein: a first unit (4) is formed by at least one first shovel friction block (21), a second unit (5) is formed by at least one second shovel friction block (22), the friction material block (3) comprises a first friction material block (31) arranged on the periphery of the metal chip (1) and a second friction material block (32) arranged on the inner ring of the metal chip (1), the first unit (4) and the second unit (5) are symmetrically arranged at two ends of the first friction material block (31), the second block of friction material (32) being arranged on the side of the first unit (4) remote from the first block of friction material (31), the first unit (4), the second unit (5), the first block of friction material (31) and the second block of friction material (32) forming a third unit (6), at least two third units (6) are arranged on the metal chip (1).

3. A wet friction plate of new friction material groove type as claimed in claim 2 wherein: a first groove (311) is formed between the first friction material block (31) and the adjacent first shovel-type friction block (21), a second groove (312) is formed between the first friction material block (31) and the adjacent second shovel-type friction block (22), a third groove (321) is formed between the second friction material block (32) and the adjacent second shovel-type friction block (22), and a fourth groove (322) is formed between the second friction material block (32) and the adjacent first shovel-type friction block (21).

4. A wet friction plate of new friction material groove type as defined in claim 3 wherein: the widths of the first groove (311), the second groove (312), the third groove (321) and the fourth groove (322) are all 1.2-2.5 mm.

5. A wet friction plate of new friction material groove type as defined in claim 3 wherein: the first block of friction material (31) is a first block of triangular friction material and the second block of friction material (32) is a second block of triangular friction material; and a fifth groove (313) is formed between the first shovel-type friction block (21) and the second shovel-type friction block (22) which are adjacent to each other on the left and right sides of the first triangular friction material block, and a sixth groove (323) is formed between the first shovel-type friction block (21) and the second shovel-type friction block (22) which are adjacent to each other on the left and right sides of the second triangular friction material block.

6. A wet friction plate of new friction material groove type as defined in claim 5 wherein: the groove widths of the fifth groove (313) and the sixth groove (323) are two times of the groove width of the first groove (311).

7. A wet friction plate of new friction material groove type as claimed in claim 2 wherein: the first friction material block (31) is a first trapezoidal friction material block, and the second friction material block (32) is a second trapezoidal friction material block.

8. A wet friction plate of new friction material groove type as claimed in claim 7 wherein: the first trapezoidal friction material block comprises a first trapezoidal block (33) and a second trapezoidal block (34), a seventh groove (331) is formed between the first trapezoidal block (33) and the second trapezoidal block (34), the second trapezoidal friction material block comprises a third trapezoidal block (35) and a fourth trapezoidal block (36), and an eighth groove (351) is formed between the third trapezoidal block (35) and the fourth trapezoidal block (36).

9. A wet friction plate of new friction material groove type as defined in claim 8 wherein: the groove widths of the seventh groove (331) and the eighth groove (351) are both between 1.2 mm and 2.5 mm.

10. A wet friction plate of new friction material groove type as claimed in claim 1, wherein: and a plurality of spline teeth (7) are arranged on the inner circumferential surface of the metal chip (1).

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