Control device and control method suitable for braking torque of wet brake

Abstract

The invention relates to the technical field of wet brakes, in particular to a control device and method suitable for the braking torque of a wet brake. The control device is arranged in an inner cavity of the brake shell and located on the left side of the brake spring and comprises an inner cavity assembly, a translation assembly, a rotating assembly and a first locking device. The friction plates and the steel sheets are identical in number and are arranged in an overlapped mode. The control device drives the translation assembly to translate through rotation of the rotating assembly, then the compression amount and the elastic force of the brake spring in the normal state are changed, the extrusion stress of the extrusion push ring on the steel sheet and the friction sheet is changed, and finally the brake torque of relative rotation between the brake shell and the rotating inner shaft is adjusted. According to the control device for the braking torque of the wet brake, a double locking mode is adopted to lock the rotational degree of freedom of the rotating assembly, and finally stability of the braking torque in a normal state is achieved.

Description

Technical Field

[0001] This application relates to the field of wet brake technology, specifically to a control device and control method for the braking torque of wet brakes. Background Technology

[0002] A wet brake, in which the core braking components are completely sealed within a cavity filled with cooling lubricating oil (usually the fluid found in the transmission or drive axle), offers excellent heat dissipation. Wet brakes can be categorized into booster brakes and depressurizer brakes based on their braking mode. In a depressurizer brake, the brake spring provides the braking force while the hydraulic fluid provides the reaction force. If a hydraulic system malfunctions suddenly while the vehicle is in motion, such as a ruptured line or engine stall causing the oil pump to stop, hydraulic pressure will be lost, and the spring will immediately activate to achieve automatic emergency braking, ensuring safety.

[0003] The braking torque of a pressure-reducing brake depends entirely on the force of the brake spring. However, existing wet brakes cannot adjust the force of the brake spring: when the brake spring force is too large, even under full hydraulic pressure, it cannot counteract the force, resulting in a certain braking force during normal driving and causing energy loss; conversely, when the brake spring force is too small, even when the hydraulic pressure approaches zero, the spring force cannot meet the braking requirements, causing slippage. Therefore, a device that can control the force of the brake spring is needed. Summary of the Invention

[0004] A control device for the braking torque of a wet brake, wherein the wet brake includes at least a brake housing, a steel sheet disposed within the brake housing, a rotating inner shaft rotatably disposed within the brake housing, a friction pad disposed outside the rotating inner shaft, a compression ring slidably disposed on the left side of the inner cavity of the brake housing, brake springs evenly distributed circumferentially on the left side of the compression ring, and a hydraulic pipeline disposed at the sealing ring cavity between the compression ring and the brake housing. The inner cavity of the brake housing is formed from right to left as a right narrow circular cavity, a middle wide circular cavity, and a left narrow circular cavity; The control device is located in the inner cavity of the brake housing to the left of the brake spring. The control device includes an inner cavity assembly located in the brake housing, a translation component abutting against the left side of the brake spring, a rotation component located in the inner cavity assembly for driving the translation component to move left and right, and a first locking device for locking the rotational degree of freedom of the rotation component. The number of friction plates and steel plates is the same and they are arranged in an overlapping manner.

[0005] The inner cavity assembly includes an annular inner cavity located at the position corresponding to the wide circular cavity of the brake housing, and arc-shaped through holes evenly distributed circumferentially on the inner wall of the annular inner cavity. Radial sliding holes are also evenly distributed circumferentially on the outer side of the annular inner cavity. An outer locking hole is provided to the left of the outer side of the radial sliding hole. Inner through holes are evenly distributed circumferentially on the left side of the annular inner cavity. Anti-rotation blind holes are also evenly distributed circumferentially on the left side of the left-positioned narrow cavity. There are three radial sliding holes, three outer locking holes, and three inner through holes. There are four arc-shaped through holes and four anti-rotation blind holes.

[0006] The translation assembly includes a slidable translation cylinder located on the left side of the inner wall of the medium-wide circular cavity, driven oblique holes evenly distributed circumferentially on the outer wall of the translation cylinder, a spring retaining ring located on the right side of the translation cylinder and abutting against the brake spring, and anti-rotation shafts evenly distributed circumferentially on the left side of the translation cylinder and inserted into the anti-rotation blind holes one by one.

[0007] The rotary assembly includes a slewing component and an adjustment component; The rotary assembly includes a rotatable rotary ring located in the left half of the annular inner cavity, circumferentially distributed locking teeth on the right end face of the rotary ring, circumferentially distributed driven arc teeth on the left side of the outer edge of the rotary ring, and an active insert rod circumferentially distributed on the inner wall of the rotary ring and passing through an arc-shaped through hole. The active insert rod is inserted into and engaged with the driven oblique holes one by one. The adjustment component corresponds one-to-one with the driven arc tooth. The adjustment component includes an adjustment shaft that is rotatable and located in the inner through hole, and a drive gear located on the right side of the adjustment shaft and meshing with the corresponding driven arc tooth. The left side of the adjustment shaft is formed with a screw terminal with a cross-shaped pattern.

[0008] The first locking device includes a slidable locking ring located in the right half of the annular inner cavity, and first locking teeth evenly distributed circumferentially on the left side of the locking ring and engaging with the full-circumferential locking teeth. The right end face of the locking ring has spring insertion holes evenly distributed circumferentially, and a return spring is provided in the corresponding spring insertion hole. The outer circumference of the locking ring has radial connecting rods evenly distributed circumferentially, corresponding one-to-one with the radial sliding holes. The far left end of the radial connecting rod is provided with a pressing crossbar that passes through the outer locking hole.

[0009] The beneficial effects of this invention are: The present invention discloses a control device for the braking torque of a wet brake, which drives the translation component to translate by rotating the rotary assembly, thereby changing the compression and elasticity of the brake spring under normal conditions, changing the compressive stress of the extrusion ring on the steel sheet and friction plate, and finally adjusting the braking torque of the relative rotation between the brake housing and the rotating inner shaft.

[0010] The wet brake torque control device of this invention employs a dual-locking mode to lock the rotational degrees of freedom of the rotating assembly, ultimately achieving stable braking torque under normal conditions. First, the first locking device locks the rotational freedom of the rotating assembly by engaging the first locking tooth with the full circumferential locking tooth. Then, under normal conditions, the second locking device locks the rotational freedom of the rotating assembly by locking the wedge-shaped locking head of the locking shaft and the arc-shaped locking block. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is an isometric sectional view of one embodiment of the control device (the second locking device is omitted).

[0013] Figure 2 This is an isometric sectional view of one embodiment of the internal cavity assembly.

[0014] Figure 3 This is a cross-sectional view of one embodiment of the said cavity assembly.

[0015] Figure 4 This is a schematic diagram of one embodiment of the translation component.

[0016] Figure 5 This is an isometric sectional view of one embodiment of the translation component.

[0017] Figure 6 This is an isometric sectional view of one embodiment of the translation component and the rotation assembly.

[0018] Figure 7 This is a side view of one embodiment of the translation component and rotation assembly.

[0019] Figure 8 This is an isometric sectional view of one embodiment of the first locking device.

[0020] Figure 9 This is an isometric sectional view of one embodiment of the translation component, rotation assembly, and first locking device.

[0021] Figure 10 This is a cross-sectional view of one embodiment of the wet brake.

[0022] Figure 11 This is a cross-sectional view of the control device in its first state.

[0023] Figure 12 This is a cross-sectional view of the control device in its second state.

[0024] Figure 13 yes Figure 11 Enlarged schematic diagram of the first state of part A in the middle.

[0025] Figure 14 yes Figure 11 Enlarged schematic diagram of the second state of part A in the middle.

[0026] Figure 15 yes Figure 12 Enlarged schematic diagram of the first state of part B.

[0027] Figure 16 yes Figure 12 Enlarged schematic diagram of the second state of part B.

[0028] The numbers in the diagram are as follows: 9. Wet brake; 91. Brake housing; 911. Right narrow circular cavity; 912. Middle wide circular cavity; 913. Left narrow circular cavity; 92. Steel plate; 93. Rotating inner shaft; 94. Friction plate; 95. Extrusion push ring; 96. Brake spring; 97. Hydraulic pipeline. 8. Control device; 1. Inner cavity assembly; 11. Annular inner cavity; 12. Arc-shaped through hole; 13. Radial sliding hole; 14. Outer locking hole; 15. Inner through hole; 16. Anti-rotation blind hole; 2. Translation assembly; 21. Translation cylinder; 22. Follower inclined hole; 23. Spring retaining ring; 24. Anti-rotation shaft; 3. Rotating assembly; 31. Rotary assembly; 311. Rotary ring; 312. Full-circumference locking tooth; 313. Driven arc tooth; 314. Active insertion rod; 315. Arc-shaped locking block; 32. Adjustment assembly; 321. Adjustment shaft; 322. Drive gear; 323. Tightening terminal; 4. First locking device; 41. Locking ring; 42. First locking tooth; 43. Return spring; 44. Radial connecting rod; 45. Pressing crossbar; 5. Second locking device; 51. Locking cavity; 511. Locking fine hole; 512. Locking coarse hole; 513. Centered ball hole; 514. Unlocking coarse hole; 515. Spherical through hole. 52. Press the lock cylinder; 521. Lock the thin shaft; 522. Lock the thick block; 523. Upper hole of the hemisphere; 524. Upper compression spring; 525. Lock the ball; 526. Unlock the thin rod; 527. Unlock the thick block; 528. Lower hole of the hemisphere; 529. Lower compression spring. Detailed Implementation

[0029] A control device for the braking torque of a wet brake, wherein the wet brake 9 includes at least a brake housing 91, a steel sheet 92 disposed within the brake housing 91, a rotating inner shaft 93 rotatably disposed within the brake housing 91, a friction pad 94 disposed outside the rotating inner shaft 93, a compression ring 95 slidably disposed on the left side of the inner cavity of the brake inner housing 91, brake springs 96 circumferentially distributed on the left side of the compression ring 95, and a hydraulic line 97 disposed at the sealing ring cavity between the compression ring 95 and the brake housing 91; The inner cavity of the brake housing 91 is formed from right to left as a right narrow circular cavity 911, a middle wide circular cavity 912, and a left narrow circular cavity 913; The control device 8 is located in the inner cavity of the brake housing 91, to the left of the brake spring 96. The control device 8 includes an inner cavity assembly 1 located in the brake housing 91, a translation component 2 abutting against the left side of the brake spring 96, a rotation component 3 located in the inner cavity assembly 1 for driving the translation component 2 to move left and right, and a first locking device 4 for locking the rotational degree of freedom of the rotation component 3. The number of friction plates 94 and steel plates 92 are the same and they are arranged in an overlapping manner.

[0030] The inner cavity assembly 1 includes an annular inner cavity 11 located at the corresponding position of the brake housing 91 and the wide circular cavity 912, and arc-shaped through holes 12 evenly distributed circumferentially on the inner wall of the annular inner cavity 11. Radial sliding holes 13 are also evenly distributed circumferentially on the outer side of the annular inner cavity 11. An outer locking hole 14 is provided to the left of the outer side of the radial sliding hole 13. Inner through holes 15 are evenly distributed circumferentially on the left side of the annular inner cavity 11. Anti-rotation blind holes 16 are also evenly distributed circumferentially on the left side of the left-positioned narrow cavity 913. There are three radial sliding holes 13, three outer locking holes 14, and three inner through holes 15. There are four arc-shaped through holes 12 and four anti-rotation blind holes 16.

[0031] The translation assembly 2 includes a slidable translation cylinder 21 located on the left side of the inner wall of the medium-width circular cavity 912, driven oblique holes 22 evenly distributed around the outer wall of the translation cylinder 21, a spring retaining ring 23 located on the right side of the translation cylinder 21 and abutting against the brake spring 96, and anti-rotation shafts 24 evenly distributed around the left side of the translation cylinder 21 and inserted into the anti-rotation blind holes 16 one by one.

[0032] The rotary assembly 3 includes a rotary component 31 and an adjustment component 32; The rotary assembly 31 includes a rotatable rotary ring 311 located in the left half of the annular inner cavity 11, a full-circumferential locking tooth 312 evenly distributed on the right end face of the rotary ring 311, a driven arc tooth 313 evenly distributed on the left side of the outer edge of the rotary ring 311, and an active insertion rod 314 evenly distributed on the inner wall of the rotary ring 311 and passing through the arc-shaped through hole 12. The active insertion rod 314 is inserted into the driven oblique hole 22 one by one. The adjustment component 32 corresponds one-to-one with the driven arc tooth 313. The adjustment component 32 includes an adjustment shaft 321 that is rotatable and disposed in the inner through hole 15, and a drive gear 322 disposed on the right side of the adjustment shaft 321 and meshing with the corresponding driven arc tooth 313. The left side of the adjustment shaft 321 is formed with a screw terminal 323 with a cross flower.

[0033] The first locking device 4 includes a slidable locking ring 41 located in the right half of the annular inner cavity 11, and first locking teeth 42 circumferentially distributed on the left side of the locking ring 41 and engaged with the full-circumferential locking teeth 312. The right end face of the locking ring 41 has spring holes circumferentially distributed and a return spring 43 is provided in the corresponding spring holes. The outer circumference of the locking ring 41 has radial connecting rods 44 that correspond one-to-one with the radial sliding holes 13. The far left end of the radial connecting rod 44 is provided with a pressing crossbar 45 that passes through the outer locking hole 14.

[0034] This case also discloses a method for controlling the braking torque of a wet brake, including the following steps: Press the first locking device 4 to the right to release the locking of the first locking device 4 on the rotational degree of freedom of the rotary assembly 3; Rotate the rotary assembly 3 to drive the translation component 2 to move left and right; Adjusting the compression and elasticity of the control spring 96 under normal conditions, thereby adjusting the compressive stress of the extrusion ring 95 on the friction plate 94 and the steel plate 92, and adjusting the braking torque of the wet brake 9.

[0035] It should be noted that the control device 8 also provides a second locking device 5 to lock the rotational degree of freedom of the rotating assembly 3.

[0036] The second locking device 5 includes a locking cavity 51 and a pressing lock cylinder 52; The locking cavity 51 includes a locking fine hole 511 located on the left side of the lower edge of the annular inner cavity 11, a locking coarse hole 512 formed in the middle of the locking fine hole 511, a central ball hole 513 located below the locking fine hole 511, an unlocking coarse hole 514 formed in the middle of the central ball hole 513, and a spherical through hole 515 connecting the locking coarse hole 512 and the unlocking coarse hole 514. The press-lock cylinder 52 includes a slidable locking thin shaft 521 disposed in the locking thin hole 511, a locking thick block 522 formed in the middle of the locking thin shaft 521, a hemispherical upper hole 523 formed in the lower end of the locking thick block 522, an upper compression spring 524 disposed on the right side of the locking thin shaft 521 located on the right side of the locking thick block 522, and a locking ball 525 disposed in the spherical through hole 515. The press-lock cylinder 52 also includes a slidable unlocking thin rod 526 disposed in the central ball hole 513, an unlocking thick block 527 formed in the middle of the unlocking thin rod 526, a hemispherical lower hole 528 formed above the unlocking thick block 527, and a lower compression spring 529 disposed on the right side of the unlocking thick block 527. The right end of the locking shaft 521 is formed into a wedge-shaped lock head, and an arc-shaped locking block 315 is provided below the left end face of the rotating ring 311. The left end face of the arc-shaped locking block 315 is equally distributed with locking slots that lock and engage with the wedge-shaped lock head of the locking shaft 521.

[0037] Based on the aforementioned technical solution of the second locking device 5, the wet brake torque control method includes the following steps: S1, unlocks the rotational degrees of freedom of rotary assembly 3: S1.1, Unlock the first locking device 4: Simultaneously press all the pressing crossbars 45, which will drive the radial connecting rod 44, the locking ring 41, and the first locking tooth 42 to move to the right against the damping of the reset spring 43; The first locking tooth 42 disengages from the full-circumference locking tooth 312; Release the first locking device 4 from locking the rotating assembly 3.

[0038] S1.2, Unlock the second locking device 5: Refer to the instruction manual appendix Figure 13 , 14 As shown: Press the unlocking thin rod 526 and unlocking thick block 527 to the right, so that they move to the right against the damping of the lower compression spring 529 until the lower hemispherical hole 528 is aligned with the central ball hole 513; The upper compression spring 524 drives the locking thin shaft 521, the locking coarse block 522, and the upper hole 523 of the hemisphere to move to the left. The upper hole 523 of the hemisphere squeezes the locking ball 525, causing it to slide downward into the lower hole 528 of the hemisphere. The locking block 522 stops the locking ball 525 from moving upward, while the locking ball 525 locks the lower hole 528 of the hemisphere, so that the unlocking rod 526, the unlocking block 527, and the lower hole 528 of the hemisphere always remain in the right-side compressed position. The wedge-shaped lock head of the locking shaft 521 disengages from the locking slot of the arc-shaped lock block 315; Release the second locking device 5 from locking the rotating assembly 3.

[0039] S2, Adjust the position of translation component 2: Rotating any of the rotating terminals 323 will cause the adjusting shaft 321 and the drive gear 322 to rotate. The drive gear 322 acts on the drive rod 314, thereby driving the rotary assembly 31 to rotate; The driven arc tooth 313 acts on the driven oblique hole 22, thereby driving the translation component 2 to move in the left and right direction.

Claims

1. A control device for the braking torque of a wet brake, characterized in that: The wet brake (9) includes at least a brake housing (91), a steel sheet (92) disposed inside the brake housing (91), a rotating inner shaft (93) rotatably disposed inside the brake housing (91), a friction pad (94) disposed outside the rotating inner shaft (93), a compression ring (95) slidably disposed on the left side of the inner cavity of the brake inner housing (91), a brake spring (96) circumferentially distributed on the left side of the compression ring (95), and a hydraulic line (97) disposed at the sealing ring cavity between the compression ring (95) and the brake housing (91). The control device (8) is located in the inner cavity of the brake housing (91) to the left of the brake spring (96). The control device (8) includes an inner cavity assembly (1) located in the brake housing (91), a translation component (2) abutting to the left of the brake spring (96), a rotation component (3) located in the inner cavity assembly (1) for driving the translation component (2) to move left and right, and a first locker (4) for locking the rotational degree of freedom of the rotation component (3).

2. The control device for braking torque of a wet brake according to claim 1, characterized in that: The inner cavity of the brake housing (91) is formed from right to left as a right narrow circular cavity (911), a middle wide circular cavity (912), and a left narrow circular cavity (913). The inner cavity assembly (1) includes an annular inner cavity (11) located at the position corresponding to the brake housing (91) and the medium-wide circular cavity (912), and arc-shaped through holes (12) evenly distributed in the circumferential direction on the inner wall of the annular inner cavity (11). Radial sliding holes (13) are also evenly distributed in the circumferential direction on the outer side of the annular inner cavity (11). An outer locking hole (14) is provided to the left of the outer side of the radial sliding hole (13). An inner through hole (15) is evenly distributed in the circumferential direction on the left side of the annular inner cavity (11). An anti-rotation blind hole (16) is also evenly distributed in the circumferential direction on the left side of the left narrow cavity (913). The translation assembly (2) includes a slidable translation cylinder (21) located on the left side of the inner wall of the medium-width circular cavity (912), driven oblique holes (22) evenly distributed around the outer wall of the translation cylinder (21), a spring retaining ring (23) located on the right side of the translation cylinder (21) and abutting against the brake spring (96), and anti-rotation shafts (24) evenly distributed around the left side of the translation cylinder (21) and inserted into the anti-rotation blind holes (16). The rotating assembly (3) includes a rotary component (31) and an adjusting component (32); The rotary assembly (31) includes a rotatable rotary ring (311) located in the left half of the annular inner cavity (11), a full-circumferential locking tooth (312) evenly distributed on the right end face of the rotary ring (311), a driven arc tooth (313) evenly distributed on the left side of the outer edge of the rotary ring (311), and an active insertion rod (314) evenly distributed on the inner wall of the rotary ring (311) and passing through the arc-shaped through hole (12). The active insertion rod (314) is inserted into the driven oblique hole (22) one by one. The adjustment component (32) corresponds one-to-one with the driven arc tooth (313). The adjustment component (32) includes an adjustment shaft (321) that is rotatable and located in the inner through hole (15), and a drive gear (322) located on the right side of the adjustment shaft (321) and meshing with the corresponding driven arc tooth (313). The first locking device (4) includes a slidable locking ring (41) located in the right half of the annular inner cavity (11), and first locking teeth (42) evenly distributed on the left side of the locking ring (41) and locked in cooperation with the full-circumferential locking teeth (312). The right end face of the locking ring (41) is evenly distributed with spring insertion holes and a reset spring (43) is provided in the corresponding spring insertion hole. The outer circumference of the locking ring (41) is evenly distributed with radial connecting rods (44) corresponding to the radial sliding holes (13). The far left side of the radial connecting rod (44) is provided with a pressing crossbar (45) that passes through the outer locking hole (14).

3. A control device for braking torque of a wet brake according to claim 2, characterized in that: The radial sliding hole (13), the outer locking hole (14), and the inner through hole (15) are each provided in threes.

4. A control device for braking torque of a wet brake according to claim 3, characterized in that: The arc-shaped through hole (12) has four holes.

5. A control device for braking torque of a wet brake according to claim 4, characterized in that: The anti-rotation blind hole (16) is provided in four parts.

6. A control device for braking torque of a wet brake according to claim 5, characterized in that: The left side of the adjusting shaft (321) has a rotating terminal (323) with a cross pattern.

7. A control device for braking torque of a wet brake according to claim 6, characterized in that: The friction plates (94) and steel plates (92) are the same in number and are arranged in an overlapping manner.

8. A method for controlling the braking torque of a wet brake, using the control device described in any one of claims 1-7, characterized in that: Includes the following steps: Press the first locking device (4) to the right to release the locking of the first locking device (4) on the rotational degree of freedom of the rotating assembly (3); Rotate the rotary assembly (3) to drive the translation component (2) to move left and right; Adjust the compression and elasticity of the control spring (96) under normal conditions, thereby adjusting the compressive stress of the extrusion ring (95) on the friction plate (94) and steel plate (92), and adjusting the braking torque of the wet brake (9).

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