Hydraulic magneto-rheological composite braking disc brake

Abstract

The invention discloses a hydraulic magneto-rheological composite braking disc brake. The hydraulic magneto-rheological composite braking disc brake comprises a brake disc, a hydraulic braking structure and a magneto-rheological braking structure. The brake disc comprises a brake disc body and cylindrical protrusions. The hydraulic braking structure comprises a left braking assembly and a right braking assembly, each of the left braking assembly and the right braking assembly comprises a caliper, a piston and a friction plate, a piston cavity is formed in the caliper, an oil port communicated with the piston cavity is formed in the upper side of the caliper, the piston is installed in the piston cavity, one end of the piston makes contact with hydraulic oil input into the caliper, and the other end of the piston is connected with the friction plate. The magnetorheological brake structure comprises a magnetic core, a sleeve and a cylinder barrel which are sequentially arranged on the protrusion in a sleeving mode from inside to outside, an excitation coil is wound on an outer ring of the magnetic core, end covers are installed at the left end and the right end of the magnetic core, the left end and the right end of the sleeve and the left end and the right end of the cylinder barrel respectively, and magnetorheological fluid flow channels which are communicated are arranged between the cylinder barrel and the sleeve, between the sleeve and the magnetic core and between the magnetic core and the protrusion of the brake disc. According to the invention, quick response and accurate control can be realized, and meanwhile, strong and stable braking force is ensured.

Description

Technical Field

[0001] The present invention relates to a disc brake with hydraulic and magnetorheological composite braking, belonging to the technical field of brakes. Background Art

[0002] The emergence of the hydraulic-magnetorheological composite braking system stems from the higher requirements for the performance, response speed, and control accuracy of traditional braking systems. Although the hydraulic braking system has powerful braking force, it has limitations in terms of response speed and flexible control, and cannot meet the needs of modern high-performance vehicles and equipment. With the maturity of magnetorheological technology, magnetorheological fluid can quickly adjust its viscosity through a magnetic field, achieving millisecond-level response and precise control, making it an ideal complementary technology. The development of autonomous driving technology and intelligent driving assistance systems has further promoted the demand for more intelligent and faster-responsive braking systems. The composite braking system combines the lasting stability of hydraulic braking and the fast adjustment ability of magnetorheological braking, and can provide the optimal braking effect under different road conditions and driving scenarios. In addition, this system is also applicable to high-load industrial equipment and special vehicles, achieving more flexible braking control while ensuring strong braking force. Summary of the Invention

[0003] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a disc brake with hydraulic and magnetorheological composite braking, which can respond quickly and control precisely, while ensuring strong and stable braking force.

[0004] In order to achieve the above object, a disc brake with hydraulic and magnetorheological composite braking adopted by the present invention includes:

[0005] A brake disc, including a brake disc body, and a cylindrical protrusion is provided on one side of the middle of the brake disc body;

[0006] A hydraulic braking structure, including a left braking assembly and a right braking assembly symmetrically installed on both sides of the brake disc body. Both the left and right braking assemblies include a caliper, a piston, and a friction plate. A piston cavity is provided in the caliper, and an oil port communicating with the piston cavity is provided on the upper side of the caliper. The piston is installed in the piston cavity. One end of the piston contacts the hydraulic oil input into the caliper, and the other end is connected to the friction plate. The piston is driven by the hydraulic oil to drive the friction plate to press against the brake disc to achieve braking;

[0007] A magnetorheological braking structure, including a magnetic core, a sleeve, and a cylinder barrel sleeved on the protrusion of the brake disc in sequence from the inside to the outside. An exciting coil is wound around the outer circle of the magnetic core. End caps are installed at both the left and right ends of the magnetic core, the sleeve, and the cylinder barrel. A connected magnetorheological fluid flow channel is provided between the cylinder barrel and the sleeve, between the sleeve and the magnetic core, and between the magnetic core and the protrusion of the brake disc. When the exciting coil is energized, a magnetic field is generated, causing the magnetorheological fluid to generate a braking torque to brake the brake disc.

[0008] As an improvement, the calipers of the left and right braking components are bolted to the bracket, and the bracket is bolted to the axle.

[0009] As an improvement, the end cover includes a first end cover and a second end cover. The two ends of the cylinder barrel are respectively connected to the first end cover and the second end cover. One end of the sleeve is connected to the second end cover, and there is a gap between the other end and the first end cover. One end of the magnetic core is connected to the first end cover, and there is a gap between the other end and the second end cover.

[0010] As an improvement, the cylinder barrel includes a first cylinder barrel, a third magnetic isolation ring, and a second cylinder barrel that are connected in sequence. Static sealing rings are respectively provided between the two ends of the third magnetic isolation ring and the first cylinder barrel and the second cylinder barrel.

[0011] As an improvement, the sleeve includes a first magnetic conductive sleeve, a first magnetic isolation ring, a second magnetic conductive sleeve, a second magnetic isolation ring, and a third magnetic conductive sleeve that are connected in sequence. The first magnetic isolation ring and the second magnetic isolation ring fix the magnetic conductive sleeves together by stamping.

[0012] As an improvement, the first cylinder barrel, the second cylinder barrel, the first magnetic conductive sleeve, the second magnetic conductive sleeve, the third magnetic conductive sleeve, and the magnetic core are all made of magnetic conductive materials, and the first magnetic isolation ring, the second magnetic isolation ring, and the third magnetic isolation ring are all made of copper materials.

[0013] As an improvement, a groove is provided between the end cover and the protrusion of the brake disc, and a rotary PTFE combination ring composed of a static sealing ring and a dynamic sealing ring is installed in the groove.

[0014] As an improvement, a liquid inlet hole communicating with the magnetorheological fluid flow channel is provided on one of the end covers.

[0015] As an improvement, a second lead through hole is provided on the other end cover, a first lead through hole is provided inside the magnetic core, and the lead through holes on the end cover and the magnetic core cooperate to form a lead channel.

[0016] As an improvement, the brake disc is a drilled and grooved disc.

[0017] Compared with the prior art, the disc brake with hydraulic magnetorheological composite braking of the present invention combines the advantages of hydraulic braking and magnetorheological braking, provides quick response and precise control, and at the same time ensures strong and stable braking force; by reducing wear and heat fade, the braking efficiency and system safety are improved, and the energy utilization is optimized. Description of the Drawings

[0018] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a sectional view of the normal position of the overall structure of the present invention;

[0020] Figure 3 This is the working state sectional view of the overall structure of the present invention;

[0021] Figure 4 This is the schematic diagram of the lead channel of the present invention:

[0022] Figure 5 This is the schematic diagram of the working state of the excitation coil of the present invention;

[0023] Figure 6 This is the schematic diagram of the explosion structure of the present invention;

[0024] In the figure: 1. First caliper; 2. First oil port; 3. First friction plate; 4. First piston; 5. Bracket; 6. First cylinder barrel; 7. First end cover; 8. First magnetic conduction sleeve; 9. First magnetic isolation ring; 10. Second magnetic conduction sleeve; 11. Second magnetic isolation ring; 12. First static sealing ring; 13. First dynamic sealing ring; 14. First compression bolt; 15. Second compression bolt; 16. Second caliper; 17. Second oil port; 18. Second friction plate; 19. Second piston; 20. Third magnetic isolation ring; 21. Second cylinder barrel; 22. Third magnetic conduction sleeve; 23. Second end cover; 24. Magnetic core; 25. Second dynamic sealing ring; 26. Second static sealing ring; 27. Third compression bolt; 28. Fourth compression bolt; 29. Excitation coil; 30. Third static sealing ring; 31. Fourth static sealing ring; 32. Brake disc; 33. First lead through hole; 34. Second lead through hole; 35. Liquid inlet hole. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present disclosure.

[0026] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection content of the present invention.

[0027] As Figures 1-6 shown, a disc brake with hydraulic magnetorheological composite braking includes a brake disc 32, a hydraulic braking structure and a magnetorheological braking structure respectively installed on the brake disc 32 for realizing braking;

[0028] The brake disc 32 comprises a brake disc body, and a cylindrical protrusion is provided on one side of the middle part of the brake disc body;

[0029] The hydraulic brake structure comprises a left brake assembly and a right brake assembly symmetrically mounted on both sides of a brake disc body, and both the left and right brake assemblies comprise a caliper, a piston and a friction plate. A piston cavity is provided in the caliper, and an oil port communicating with the piston cavity is provided on the upper side of the caliper. The piston is mounted in the piston cavity, and one end of the piston contacts the hydraulic oil input into the caliper, and the other end is connected to the friction plate. The piston is driven by the hydraulic oil to drive the friction plate to squeeze the brake disc body to achieve braking.

[0030] The magnetorheological brake structure includes a magnetic core 24, a sleeve and a cylinder which are sequentially mounted on the protrusion of the brake disc 32 from the inside to the outside. An excitation coil 29 is wound on the outer ring of the magnetic core 24. End covers are installed on the left and right ends of the magnetic core 24, the sleeve and the cylinder. Connected magnetorheological fluid flow channels are provided between the cylinder and the sleeve, between the sleeve and the magnetic core 24, and between the magnetic core 24 and the protrusion of the brake disc 32. When the excitation coil 29 is energized, a magnetic field is generated, causing the magnetorheological fluid to generate a braking torque to brake the brake disc 32.

[0031] As an improved embodiment, Figures 1-3 , Figure 6 As shown, the left brake assembly includes a first caliper 1, a first piston 4 and a first friction plate 3. The first piston 4 is placed in the piston cavity of the first caliper 1. One end of the first piston 4 contacts the input hydraulic oil, and the other end is connected to the first friction plate 3. The right brake assembly includes a second caliper 16, a second piston 19 and a second friction plate 18. The second piston 19 is placed in the piston cavity of the second caliper 16. One end of the second piston 19 contacts the input hydraulic oil, and the other end is connected to the second friction plate 18. When braking, hydraulic oil with a certain pressure enters the piston cavity of each caliper through the first oil port 2 on the first caliper 1 and the second oil port 17 on the second caliper 16, respectively, and pushes the first piston 4 and the second piston 19 accordingly, thereby forcing the friction plate and the brake disc body to generate extrusion to increase friction and achieve a braking effect. At the same time, the magnetorheological braking structure also works during braking, as shown in FIG. Figure 5 As shown, when the excitation coil 29 is energized, a magnetic field is generated, and the magnetorheological fluid changes from a liquid state to a solid-like state under the action of the magnetic field. The viscosity of the magnetorheological fluid increases, and the resistance to relative motion increases accordingly, thereby generating a braking torque to brake the brake disc 32.

[0032] As an improved embodiment, Figures 1-3 , Figure 6 As shown, it also includes a bracket 5, which is fixedly connected to the first caliper 1 and the second caliper 16 by bolts, and the bracket 5 is fastened to the axle by bolts.

[0033] As an improved embodiment, as Figures 1-3 、 Figure 5 shown, the end cover includes a first end cover 7 and a second end cover 23. Both ends of the cylinder barrel are respectively connected to the first end cover 7 and the second end cover 23. One end of the sleeve is connected to the second end cover 23, and there is a gap between the other end and the first end cover 7. One end of the magnetic core 24 is connected to the first end cover 7, and there is a gap between the other end and the second end cover 23, ensuring that a connected magnetorheological fluid flow channel can be formed between the cylinder barrel and the sleeve, between the sleeve and the magnetic core 24, and between the magnetic core 24 and the protrusion of the brake disc 32.

[0034] As an improved embodiment, as Figures 1-3 、 Figure 6 shown, the cylinder barrel includes a first cylinder barrel 6, a third magnetic isolation ring 20, and a second cylinder barrel 21 that are connected in sequence. The first end cover 7 and the first cylinder barrel 6 are fixedly connected by a second compression bolt 15. The third magnetic isolation ring 20 is provided between the first cylinder barrel 6 and the second cylinder barrel 21. The second cylinder barrel 21 and the second end cover 23 are fixedly connected by a fourth compression bolt 28. Third static seals 30 and fourth static seals 31 are correspondingly provided between the third magnetic isolation ring 20 and the first cylinder barrel 6 and the second cylinder barrel 21;

[0035] The sleeve includes a first magnetic conductive sleeve 8, a first magnetic isolation ring 9, a second magnetic conductive sleeve 10, a second magnetic isolation ring 11, and a third magnetic conductive sleeve 22 that are connected in sequence. The second end cover 23 is provided with a threaded through hole, and the third magnetic conductive sleeve 22 is correspondingly provided with a threaded hole. The second end cover 23 and the third magnetic conductive sleeve 22 are fixedly connected by a third compression bolt 27. The second magnetic isolation ring 11 is provided between the third magnetic conductive sleeve 22 and the second magnetic conductive sleeve 10, and the first magnetic isolation ring 9 is provided between the second magnetic conductive sleeve 10 and the first magnetic conductive sleeve 8. The first magnetic isolation ring 9 and the second magnetic isolation ring 11 fixedly connect the first magnetic conductive sleeve 8, the second magnetic conductive sleeve 10, and the third magnetic conductive sleeve 22 through stamping technology.

[0036] As an improved embodiment, as Figure 2 、 Figure 3 shown, one end of the magnetic core 24 is provided with a threaded hole, and the first end cover 7 is provided with a threaded through hole. The first compression bolt 14 passes through the threaded through hole on the first end cover 7 and the threaded hole on the magnetic core 24 to fixedly connect the first end cover 7 and the magnetic core 24.

[0037] As an improved embodiment, as Figure 2 、 Figure 3 shown, a rectangular groove is provided on the inner side of one end of the second end cover 23. A second static seal 26 and a second dynamic seal ring 25 are placed in the rectangular groove. The second static seal 26 and the second dynamic seal ring 25 together form a rotating PTFE combination seal;

[0038] One end of the brake disc 32 which protrudes (the end opposite to the rectangular groove provided on the second end cover 23) is provided with a rectangular groove, and a first static sealing ring 12 and a first dynamic sealing ring 13 are placed in the rectangular groove. The second static sealing ring 26 and the second dynamic sealing ring 25 together form a rotating PTFE combination ring.

[0039] As an improved embodiment, as Figure 2 、 Figure 3 shown, a liquid inlet hole 35 communicating with the magnetorheological fluid flow channel is opened on the second end cover 23 so as to inject the magnetorheological fluid into the interior of the magnetorheological braking structure. In addition, a second lead through hole 34 is provided on the first end cover 7, and a first lead through hole 33 is provided inside the magnetic core 24. The lead through holes 33 on the first end cover 7 and the magnetic core 24 cooperate to form a lead channel 34.

[0040] As an improved embodiment, as Figure 1 shown, the brake disc 32 is a perforated and scored disc. The perforated and scored disc helps with better heat dissipation, reduces braking noise, enhances braking performance, and moreover, through perforating and scoring, the stress distribution of the brake disc 32 is more uniform, which helps to reduce the deformation of the brake disc 32 caused by uneven heating at high temperatures.

[0041] As an improved embodiment, the first cylinder 6, the second cylinder 21, the first magnetic conduction sleeve 8, the second magnetic conduction sleeve 10, the third magnetic conduction sleeve 22 and the magnetic core 24 are all made of magnetic conduction materials, and the first magnetic isolation ring 9, the second magnetic isolation ring 11 and the third magnetic isolation ring 20 are made of copper materials.

[0042] As Figure 2 shown, when not braking, the first piston 4 and the second piston 19 do not push the first friction plate 3 and the second friction plate 18 to squeeze the brake disc 32; meanwhile, the excitation coil 29 of the magnetorheological braking structure is not energized, the magnetorheological fluid is in a low viscosity state, and the relative movement resistance between the magnetorheological fluid and the surface of the protruding part at the center of the brake disc 32 is small;

[0043] As Figure 3 shown, when braking, the hydraulic oil with a certain pressure in the hydraulic braking structure enters the piston cavity through the first oil port 2 and the second oil port 17, pushing the first piston 4 and the second piston 19 to move, so that the first friction plate 3 and the second friction plate 18 are squeezed against the brake disc 32, thereby braking; in the magnetorheological braking structure, the excitation coil 29 is energized to generate a magnetic field, the viscosity of the magnetorheological fluid increases, and the relative movement resistance increases accordingly, thereby generating a braking torque, and further braking the brake disc 32.

[0044] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0045] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A disc brake with hydraulic and magnetorheological composite braking, characterized in that, Comprising: A brake disc (32), including a brake disc body, and a cylindrical protrusion is provided on one side of the middle part of the brake disc body; A hydraulic braking structure, including a left braking assembly and a right braking assembly symmetrically installed on both sides of the brake disc body. Both the left and right braking assemblies include calipers, pistons and friction pads. A piston cavity is provided inside the caliper, and an oil port communicating with the piston cavity is provided on the upper side of the caliper. The piston is installed in the piston cavity. One end of the piston contacts the hydraulic oil input into the caliper, and the other end is connected to the friction pad. Braking is achieved by driving the piston with hydraulic oil to drive the friction pad to press the brake disc (32); A magnetorheological braking structure, including a magnetic core (24), a sleeve and a cylinder barrel sleeved on the protrusion of the brake disc (32) in sequence from inside to outside. An excitation coil (29) is wound around the outer circle of the magnetic core (24). End covers are installed at both the left and right ends of the magnetic core (24), the sleeve and the cylinder barrel. A magnetorheological fluid flow channel communicating with each other is provided between the cylinder barrel and the sleeve, between the sleeve and the magnetic core (24), and between the magnetic core (24) and the protrusion of the brake disc (32). When the excitation coil (29) is energized, a magnetic field is generated to make the magnetorheological fluid generate a braking torque to brake the brake disc (32).

2. The disc brake with hydraulic and magnetorheological composite braking according to claim 1, characterized in that, The calipers of the left and right braking assemblies are bolted to a bracket (5), and the bracket (5) is bolted to the axle.

3. The disc brake with hydraulic and magnetorheological composite braking according to claim 1, characterized in that, The end cover includes a first end cover (7) and a second end cover (23). Both ends of the cylinder barrel are respectively connected to the first end cover (7) and the second end cover (23). One end of the sleeve is connected to the second end cover (23), and there is a gap between the other end and the first end cover (7). One end of the magnetic core (24) is connected to the first end cover (7), and there is a gap between the other end and the second end cover (23).

4. The disc brake with hydraulic and magnetorheological composite braking according to claim 1, wherein The cylinder barrel includes a first cylinder barrel (6), a third magnetic isolation ring (20) and a second cylinder barrel (21) connected in sequence. Static sealing rings are respectively provided between both ends of the third magnetic isolation ring (20) and the first cylinder barrel (6) and the second cylinder barrel (21).

5. The disc brake with hydraulic and magnetorheological composite braking according to claim 4, characterized in that, The sleeve includes a first magnetic conductive sleeve (8), a first magnetic isolation ring (9), a second magnetic conductive sleeve (10), a second magnetic isolation ring (11) and a third magnetic conductive sleeve (22) connected in sequence. The first magnetic isolation ring (9) and the second magnetic isolation ring (11) fix each magnetic conductive sleeve by stamping.

6. The disc brake with hydraulic and magnetorheological composite braking according to claim 5, characterized in that, The first cylinder barrel (6), the second cylinder barrel (21), the first magnetic conductive sleeve (8), the second magnetic conductive sleeve (10), the third magnetic conductive sleeve (22) and the magnetic core (24) are all made of magnetic conductive materials, and the first magnetic isolation ring (9), the second magnetic isolation ring (11) and the third magnetic isolation ring (20) are all made of copper materials.

7. The disc brake with hydraulic and magnetorheological composite braking according to claim 1, characterized in that, A groove is provided between the end cover and the protrusion of the brake disc (32), and a rotary tetrafluoro combined ring composed of a static sealing ring and a dynamic sealing ring is installed in the groove.

8. The disc brake with hydraulic and magnetorheological composite braking according to claim 1, characterized in that, A liquid inlet hole (35) communicating with the magnetorheological fluid flow channel is provided on one of the end covers.

9. The disc brake with hydraulic and magnetorheological composite braking according to claim 8, characterized in that, A second lead through hole (34) is provided on the other end cover. A first lead through hole (33) is provided inside the magnetic core (24). The lead through holes on the end cover and the magnetic core (24) cooperate to form a lead channel.

10. The disc brake with hydraulic and magnetorheological composite braking according to claim 1, characterized in that, The brake disc (32) is a perforated and grooved disc.

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