Bionic thermoelectric power generation type magnetorheological brake and assembling method thereof

Abstract

The bionic thermoelectric power generation type magneto-rheological brake is characterized in that the bionic thermoelectric power generation type magneto-rheological brake comprises a shell, a transmission shaft rotationally installed on the shell and a brake disc connecting base fixedly arranged on the transmission shaft in a sleeving mode, an annular convex ring is arranged on one side of the brake disc connecting base, and a connecting ring is fixedly installed on the annular convex ring; a plurality of sets of brake matching discs and brake discs are sequentially connected to the connecting ring in a staggered mode, and the peripheral face, connected with the base, of the brake disc is sleeved with a coil magnetism isolating ring located on the side of the annular convex ring and a coil located in the coil magnetism isolating ring in a clearance mode. Fluid channels which are used for injecting magnetorheological fluid, are communicated with each other and are roundabout are formed between the coil magnetism isolating ring and the connecting ring, between the coil magnetism isolating ring and the brake disc and between the adjacent brake matching discs and the brake disc, and the brake matching discs extend out of the shell. The magneto-rheological brake is large in transmission torque and high in heat dissipation capacity.

Description

Technical Field

[0001] This invention relates to a magnetorheological brake, and more particularly to a biomimetic thermoelectric magnetorheological brake and its assembly method. Background Technology

[0002] Magnetorheological brakes are intelligent devices developed based on the rheological properties of magnetorheological fluids. In a typical magnetorheological brake structure, the brake shaft is connected to a rotating component, and its annular braking part is embedded within a stator structure filled with magnetorheological fluid. When a current is applied to the excitation coil, the coil generates an excitation magnetic field that penetrates the magnetorheological fluid, causing the magnetic particles in the fluid to instantaneously arrange into a chain-like structure. The breaking and reorganization of the chain-like structure causes the rotating component to generate yield stress resisting shear motion, thereby generating a continuous braking torque. By adjusting the magnitude of the excitation current, the intensity of the braking torque can be precisely and linearly controlled, giving magnetorheological brakes a significant advantage in scenarios requiring precise braking control.

[0003] However, traditional magnetorheological brakes have revealed several limitations in practical engineering applications. In non-braking conditions, the brake shaft remains rotating due to system inertia. This rotational mechanical energy is dissipated as heat through internal friction and the viscous resistance of the magnetorheological fluid, failing to be effectively utilized. Furthermore, to achieve sufficient braking torque, magnetorheological brakes often require a large braking area. A larger braking area generates more heat during braking, leading to a sharp increase in the magnetorheological fluid temperature. This can cause oxidation of the magnetorheological fluid base and particle sedimentation, thereby reducing its magnetorheological effect and operational stability. Typically, additional heat dissipation structures are required to reduce the brake's operating temperature, resulting in a bulky brake that struggles to meet the increasing demands for compactness in modern mechanical systems.

[0004] Patent research revealed that a Chinese invention patent (publication number CN 119755218A) designs a fluid-circulating magnetorheological brake. By adding a through-plate mechanism to the brake housing, the active component of the transmission structure drives the driven component in radial linear reciprocating motion, thus adding a shear-valve operating mode to the magnetorheological brake. This allows the magnetorheological brake to operate simultaneously in both shear and shear-valve modes, increasing the braking torque. It also allows the magnetorheological fluid to circulate internally, thereby reducing its temperature. However, the different operating modes reduce the stability of the magnetorheological brake's torque output, and the added reciprocating mechanism causes radial vibration in the brake, making the structure more complex and limiting its practical applications. Another patent (publication number CN113931947B) proposes an automotive magnetorheological brake, which includes a stator and a rotor. The rotor is disposed within a cavity in the stator, which contains coils, and the cavity is filled with magnetorheological fluid. A hydraulic chamber is formed axially within the rotor, with pistons at both ends. Each piston has a sliding rod extending from the hydraulic chamber, the end of which contacts the corresponding left or right end cap. Ultimately, the combined action of the blades and the sliding rod provides greater braking force to the rotor. This invention adds a complex piston-sliding rod mechanism, which, while increasing the braking torque, introduces additional friction devices within the brake, increasing energy loss and operating temperature. Furthermore, the complex structure reduces the brake's operational stability. Therefore, there is an urgent need for a magnetorheological brake that boasts strong heat dissipation, a simple structure, low energy consumption, and guaranteed operational stability. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a biomimetic thermoelectric magnetorheological brake and its assembly method, wherein the magnetorheological brake has a large transmission torque and strong heat dissipation capacity.

[0006] This invention relates to a biomimetic thermoelectric magnetorheological brake, characterized by comprising a housing, a drive shaft rotatably mounted on the housing, and a brake disc connecting base sleeved and fixed on the drive shaft. An annular convex ring is provided on one side of the brake disc connecting base, and a connecting ring is fixedly mounted on the annular convex ring. Multiple sets of brake mating discs and brake discs are sequentially and alternately connected to the connecting ring. A coil magnetic isolation ring located beside the annular convex ring and a coil located inside the coil magnetic isolation ring are spaced on the outer circumference of the brake disc connecting base. Fluid channels for injecting magnetorheological fluid and interconnected in a tortuous manner are formed between the coil magnetic isolation ring and the connecting ring, between the coil magnetic isolation ring and the brake disc, and between adjacent brake mating discs and brake discs. The brake mating disc extends outside the housing.

[0007] Preferably, the housing includes a first housing and a second housing respectively mounted on both sides of the drive shaft. The first housing has a protrusion that is fitted onto the outer peripheral surface of the brake disc connecting base with a gap. The gap formed between the inner peripheral surface of the protrusion and the outer peripheral surface of the brake disc connecting base becomes part of the fluid channel.

[0008] Preferably, the aforementioned magnetic shielding ring is sleeved on the outer periphery of the convex sleeve, the first side of the magnetic shielding ring is fixedly connected to the first housing, an annular cavity for mounting the coil is formed between the outer peripheral surface of the convex sleeve and the magnetic shielding ring, and the gap formed between the second side of the magnetic shielding ring and the connecting ring becomes part of the fluid channel.

[0009] Preferably, the connecting ring includes a first connecting ring and a second connecting ring fixedly clamped on both sides of the annular convex ring. A first connecting rod is passed through the first connecting ring, and a second magnetic isolation fixing ring and the brake disc are alternately installed on the first connecting rod. The gap formed between the inner circumferential surface of the second magnetic isolation fixing ring and the brake disc and the outer circumferential surface of the coil magnetic isolation ring becomes part of the fluid channel.

[0010] Preferably, a first magnetic isolation fixing ring is installed between adjacent brake mating discs, and each first magnetic isolation fixing ring and brake mating disc passes through a second connecting rod, with both ends of the second connecting rod locked and fixed to the first housing and the second housing.

[0011] Preferably, the gap formed between the inner circumferential surface of the brake mating disc and the outer circumferential surface of the second magnetic isolation fixing ring becomes part of the fluid channel, and the gap formed between the outer circumferential surface of the brake disc and the inner circumferential surface of the first magnetic isolation fixing ring becomes part of the fluid channel.

[0012] Preferably, the skeleton oil seals that abut against both ends of the brake disc connecting base are installed on the relatively inner sides of the first housing and the second housing, and the skeleton oil seals are sleeved on the rotating shaft.

[0013] Preferably, the outer sides of the first housing and the second housing are each equipped with a bearing end cover and a bearing that is limited within the bearing end cover. The bearing is sleeved on the outer circumferential surface of the drive shaft, and the brake disc connecting base is connected by a key installed on the drive shaft.

[0014] Preferably, the housing is provided with a magnetorheological fluid injection channel communicating with the fluid channel; a thermoelectric sensor is installed on the brake mating disc, and electrical energy is generated and collected by the thermoelectric sensor based on the temperature difference on the brake mating disc.

[0015] The assembly method of the biomimetic thermoelectric magnetorheological brake of the present invention is characterized by: Step S1: Fit the key to the keyway of the drive shaft, place the brake disc connecting base onto the drive shaft, and fix the first connecting ring and the second connecting ring to both sides of the annular convex ring with screws. Then, fix the rightmost brake disc onto the first connecting ring. Step S2: Install the skeleton oil seal onto the second housing, place the bushing and bearing onto the drive shaft, and fix the bearing end cap onto the second housing. Then, install the five brake disc mating discs and the remaining five brake discs onto the first connecting rod and the second connecting rod in the order of the first magnetic isolation fixing ring, brake mating disc, brake disc, and second magnetic isolation fixing ring. Step S3: First, install the coil in the annular cavity of the coil magnetic shielding ring. Then, fix the coil magnetic shielding ring to the first housing with screws. Next, install the skeleton oil seal inside the first housing. Connect and fix the first housing and the first magnetic shielding fixing ring through the second connecting rod. Install the bearing on the left side on the drive shaft. Then, fix the bearing end cap to the first housing. Finally, inject the magnetorheological fluid to complete the assembly.

[0016] This invention significantly improves the heat dissipation efficiency of the magnetorheological brake by placing the excitation coil inside the disc magnetorheological brake and extending the brake mating disc to the outside of the brake and into contact with the air by simulating the shape of the dorsal fin skeleton of a sailfish. By setting up a coil magnetic isolation ring and a first magnetic isolation fixing ring and a second magnetic isolation fixing ring made of magnetic isolation material, the magnetic circuit of the magnetorheological brake is optimized. The interconnected and meandering fluid channels increase the area where the magnetic lines of force in the braking gap pass perpendicularly through the magnetorheological fluid, thereby improving the braking torque of the magnetorheological brake. Attached Figure Description

[0017] Figure 1 This is a front cross-sectional view of the device of the present invention; Figure 2 This is a schematic diagram of the power generation principle of the power generation device of this invention. Detailed implementation method: like Figure 1 As shown, the biomimetic thermoelectric magnetorheological brake of the present invention includes a housing, a drive shaft 1 rotatably mounted on the housing, and a brake disc connecting base 15 sleeved and fixed on the drive shaft 1. The brake disc connecting base 15 is in the shape of a circular sleeve, and its inner circumferential surface has a keyway. A key that mates with the keyway is installed on the drive shaft 1, and an annular protrusion 20 is provided on one side of the brake disc connecting base 15.

[0018] A connecting ring (including a first connecting ring 10 and a second connecting ring 11 fixedly clamped to both sides of the annular convex ring 20 by screws) is fixedly installed on the annular convex ring 20. Multiple sets of brake mating discs 17 and brake discs 4 are sequentially and alternately connected on the connecting ring (the alternate connection means that brake mating discs 17 are installed between adjacent brake discs 4). A coil magnetic isolation ring 18 located beside the annular convex ring 20 and a coil 16 located inside the coil magnetic isolation ring 18 are spaced on the outer peripheral surface (i.e., the outer peripheral surface of the sleeve) of the moving disc connecting base 15. A coil magnetic isolation ring 18 located beside the annular convex ring 20 and a coil 16 located inside the coil magnetic isolation ring 18 are formed between the coil magnetic isolation ring 18 and the connecting ring, between the coil magnetic isolation ring 18 and the brake disc 4, and between adjacent brake mating discs 17 and brake discs 4. A tortuous fluid channel 21 is formed between the coil magnetic isolation ring 18 and the connecting ring, between the coil magnetic isolation ring 18 and the brake disc 4, and between adjacent brake mating discs 17 and brake discs 4. The brake mating disc 17 extends out of the housing.

[0019] This invention significantly improves the heat dissipation efficiency of the magnetorheological brake by placing the excitation coil 16 of the disc magnetorheological brake inside and extending the brake mating disc 17 to the outside of the brake to contact the air by simulating the shape of the dorsal fin skeleton of a sailfish. By setting the coil magnetic isolation ring 18 and the first magnetic isolation fixing ring 5 and the second magnetic isolation fixing ring 9 made of magnetic isolation material, the magnetic circuit of the magnetorheological brake is optimized. The interconnected and meandering fluid channels 21 increase the area where the magnetic lines of force in the braking gap pass perpendicularly through the magnetorheological fluid, thereby improving the braking torque of the magnetorheological brake.

[0020] The housing includes a first housing 3 and a second housing 8 respectively installed on both sides of the drive shaft 1. The first housing 3 has a protrusion 22 that is fitted onto the outer peripheral surface of the brake disc connecting base 15 with a gap. The protrusion 22 is a round sleeve, and a gap is formed between the inner peripheral surface of the protrusion 22 and the outer peripheral surface of the brake disc connecting base 15. This gap is part of the fluid channel 21.

[0021] The coil magnetic shielding ring 18 is sleeved on the outer periphery of the convex sleeve 22. The first side of the coil magnetic shielding ring 18 is fixedly connected to the first housing 3 by screws or bolts. An annular cavity for installing the coil 16 is formed between the outer peripheral surface of the convex sleeve 22 and the coil magnetic shielding ring 18 (that is, the coil 16 is installed in the annular cavity, and the coil 16 is sleeved on the outer peripheral surface of the convex sleeve 22). A gap is formed between the second side of the coil magnetic shielding ring 18 and the connecting ring, which is also part of the fluid channel 21.

[0022] A first connecting rod 23 is threaded through the first connecting ring 10. A second magnetic isolation fixing ring 9 and the brake disc 4 are installed alternately on the first connecting rod 23 (this alternate installation means that the second magnetic isolation fixing ring 9 is installed between adjacent brake discs 4). The gap formed between the inner circumferential surface of the second magnetic isolation fixing ring 9 and the brake disc 4 and the outer circumferential surface of the coil magnetic isolation ring 18 becomes part of the fluid channel 21.

[0023] A first magnetic isolation fixing ring 5 is installed between adjacent brake mating discs 17. Each first magnetic isolation fixing ring 5 and brake mating disc 17 passes through the second connecting rod 24. The two ends of the second connecting rod 24 are locked and fixed to the first housing 3 and the second housing 8. Part of the brake mating disc 17 is exposed outside the housing, and part of it is embedded in the housing between adjacent brake discs 4.

[0024] The gap formed between the inner circumferential surface of the brake mating disc 17 and the outer circumferential surface of the second magnetic isolation fixing ring 9 becomes part of the fluid channel 21, and the gap formed between the outer circumferential surface of the brake disc 4 and the inner circumferential surface of the first magnetic isolation fixing ring 5 becomes part of the fluid channel 21.

[0025] The first housing 3 and the second housing 8 are equipped with skeleton oil seals 14 that abut against both ends of the brake disc connecting base 15 on their respective inner sides. The skeleton oil seals 14 are sleeved on the rotating shaft 1. The first housing 3 and the second housing 8 are each equipped with a bearing end cover 2 and a bearing 12 that is limited in the bearing end cover 2. The bearing 12 is sleeved on the outer circumferential surface of the transmission shaft 1. The housing is provided with a magnetorheological fluid injection channel 25 that communicates with the fluid channel 21.

[0026] To achieve thermoelectric power generation, a thermoelectric inductor is installed on the brake disc 17. The temperature difference on the brake disc 17 generates electrical energy through the thermoelectric inductor, which is then collected. Specifically, N-terminal 6 and P-terminal 7 of the thermoelectric inductor are installed on both sides of the brake disc 17. The N-terminal 6 and P-terminal 7 of the thermoelectric inductor are output through wires. Figure 2 The diagram shows the principle of a thermoelectric generator simulating the dorsal fin of a sailfish embedded in a brake disc. The thermoelectric generator generates electricity based on the Seebeck effect, converting heat energy into electrical energy. The temperature of the outer part of the brake disc 17 is significantly lower than that of the inner part. Therefore, electrons diffuse from the high-temperature end to the low-temperature end, creating a potential difference and generating current, thus achieving thermoelectric power generation. Installing a thermoelectric generator on the brake disc 17 and using the temperature difference between the inside and outside of the brake to generate electricity not only improves heat dissipation efficiency but also collects heat, effectively improving the overall performance of the magnetorheological brake.

[0027] The braking process of this invention: The brake drive shaft is immersed in a sealed housing containing magnetorheological fluid. An excitation coil is energized to generate a magnetic field, which causes the magnetic particles in the magnetorheological fluid to polarize, attracting each other and forming a chain-like structure along the magnetic field lines. This structure enhances the shear resistance of the magnetorheological fluid, giving it solid-like characteristics. As the brake drive shaft rotates, the magnetic chains connecting the drive shaft and the brake mating disc continuously break and form new chains under the influence of the magnetic field. The resistance experienced by the drive shaft manifests as a stable braking torque. Under the influence of the magnetic field, the magnetorheological fluid exhibits strong controllable rheological properties. The output torque of the brake drive shaft can be controlled by adjusting the coil current. Because the brake drive shaft is connected to the housing and brake mating disc 17 in a non-direct contact manner, a stable output of braking torque can be achieved.

[0028] The present invention relates to an assembly method for a biomimetic thermoelectric magnetorheological brake. Step S1: Fit the key with the keyway of the drive shaft 1, place the brake disc connecting base 15 onto the drive shaft 1, and fix the first connecting ring 10 and the second connecting ring 11 to both sides of the annular convex ring 20 with screws. Then, fix the rightmost brake disc 4 onto the first connecting ring 10. Step S2: Install the skeleton oil seal 14 onto the second housing 8, place the bushing 13 and bearing 12 onto the drive shaft 1, and simultaneously fix the bearing end cap 2 onto the second housing 8. Then, in the order of the first magnetic isolation fixing ring 5, brake mating disc 17, brake disc 4, and second magnetic isolation fixing ring 9, install the five brake disc mating discs 17 and the remaining five brake discs 4 onto the first connecting rod 23 and the second connecting rod 24 in sequence. Step S3: First, install the coil 16 in the annular cavity of the coil magnetic shielding ring 18. Then, fix the coil magnetic shielding ring 18 to the first housing 3 with screws. Next, install the skeleton oil seal 14 inside the first housing 3. Connect and fix the first housing 3 and the first magnetic shielding fixing ring 5 through the second connecting rod 24. Install the left bearing 12 on the drive shaft 1. Then, fix the bearing end cover 2 to the first housing 3. Finally, inject the magnetorheological fluid to complete the assembly.

[0029] This invention significantly improves the heat dissipation efficiency of the magnetorheological brake by placing the excitation coil 16 of the disc magnetorheological brake inside and extending the brake mating disc 17 to the outside of the brake to contact the air by simulating the shape of the dorsal fin skeleton of a sailfish. By setting the coil magnetic isolation ring 18 and the first magnetic isolation fixing ring 5 and the second magnetic isolation fixing ring 9 made of magnetic isolation material, the magnetic circuit of the magnetorheological brake is optimized. The interconnected and meandering fluid channels 21 increase the area where the magnetic lines of force in the braking gap pass perpendicularly through the magnetorheological fluid, thereby improving the braking torque of the magnetorheological brake.

[0030] The significant advantages of this invention are as follows: (1) Compared with the single-disc structure, the present invention adopts a multi-disc structure with a single handle connection, which reduces the mass of the brake rotor while ensuring that the largest part of the brake rotor lever arm is retained, thereby transmitting a larger torque and being relatively more stable.

[0031] (2) The coil, which is usually located on the outside, is placed inside the brake. The magnetic circuit of the magnetorheological brake is optimized by setting up a magnetic shielding ring 18 for the coil and a first magnetic shielding fixing ring 5 and a second magnetic shielding fixing ring 9 made of magnetic shielding material. This increases the area where the magnetic lines of force in the brake gap pass perpendicularly through the magnetorheological fluid, thereby improving the braking torque of the magnetorheological brake. (3) By simulating the shape of the dorsal fin skeleton of a sailfish, the brake mating disc 17 is extended to the outside of the housing. This allows the temperature of the brake gap to be directly transferred to the outside of the brake. Compared with the traditional passive heat dissipation mode, which requires multiple layers of structure to form heat convection with the outside, this greatly improves the heat dissipation efficiency of the brake. (4) Due to the large temperature difference between the inside and outside of the brake mating disc 17, a thermoelectric generator is set on its outside for energy recovery. This not only further enhances its heat dissipation capacity but also effectively utilizes the heat energy of the brake to generate electricity, achieving a double benefit.

Claims

1. A biomimetic thermoelectric magnetorheological brake, characterized in that: The device includes a housing, a drive shaft (1) rotatably mounted on the housing, and a brake disc connecting base (15) sleeved and fixed on the drive shaft (1). An annular convex ring (20) is provided on one side of the brake disc connecting base (15). A connecting ring is fixedly installed on the annular convex ring (20). Multiple sets of brake mating discs (17) and brake discs (4) are sequentially and alternately connected on the connecting ring. A coil magnetic isolation ring (18) located next to the annular convex ring (20) and a coil (16) located inside the coil magnetic isolation ring (18) are spaced on the outer circumferential surface of the brake disc connecting base (15). A fluid channel (21) for injecting magnetorheological fluid (19) and interconnected and in a tortuous shape is formed between the coil magnetic isolation ring (18) and the connecting ring, between the coil magnetic isolation ring (18) and the brake disc (4), and between adjacent brake mating discs (17) and brake discs (4). The brake mating discs (17) extend out of the housing.

2. The biomimetic thermoelectric magnetorheological brake according to claim 1, characterized in that: The housing includes a first housing (3) and a second housing (8) respectively installed on both sides of the drive shaft (1). The first housing (3) has a protrusion (22) that is fitted with a gap on the outer peripheral surface of the brake disc connecting base (15). The gap formed between the inner peripheral surface of the protrusion (22) and the outer peripheral surface of the brake disc connecting base (15) becomes part of the fluid channel (21).

3. The biomimetic thermoelectric magnetorheological brake according to claim 2, characterized in that: The coil magnetic shielding ring (18) is sleeved on the outer periphery of the protruding sleeve (22). The first side of the coil magnetic shielding ring (18) is fixedly connected to the first housing (3). An annular cavity for installing the coil (16) is formed between the outer peripheral surface of the protruding sleeve (22) and the coil magnetic shielding ring (18). The gap formed between the second side of the coil magnetic shielding ring (18) and the connecting ring becomes part of the fluid channel (21).

4. The biomimetic thermoelectric magnetorheological brake according to claim 3, characterized in that: The connecting ring includes a first connecting ring (10) and a second connecting ring (11) fixedly clamped on both sides of the annular convex ring (20). A first connecting rod (23) is threaded through the first connecting ring (10). A second magnetic isolation fixing ring (9) and the brake disc (4) are alternately installed on the first connecting rod (23). The gap formed between the inner circumferential surface of the second magnetic isolation fixing ring (9) and the brake disc (4) and the outer circumferential surface of the coil magnetic isolation ring (18) becomes part of the fluid channel (21).

5. The biomimetic thermoelectric magnetorheological brake according to claim 4, characterized in that: A first magnetic isolation fixing ring (5) is installed between adjacent brake mating discs (17). Each first magnetic isolation fixing ring (5) and brake mating disc (17) passes through a second connecting rod (24). The two ends of the second connecting rod (24) are locked and fixed on the first housing (3) and the second housing (8).

6. The biomimetic thermoelectric magnetorheological brake according to claim 5, characterized in that: The gap formed between the inner circumferential surface of the brake mating disc (17) and the outer circumferential surface of the second magnetic isolation fixing ring (9) becomes part of the fluid channel (21), and the gap formed between the outer circumferential surface of the brake disc (4) and the inner circumferential surface of the first magnetic isolation fixing ring (5) becomes part of the fluid channel (21).

7. The biomimetic thermoelectric magnetorheological brake according to claim 2, characterized in that: The first housing (3) and the second housing (8) are fitted with skeleton oil seals (14) that abut against both ends of the brake disc connecting base (15), and the skeleton oil seals (14) are sleeved on the rotating shaft (1).

8. The biomimetic thermoelectric magnetorheological brake according to claim 2, characterized in that: The first housing (3) and the second housing (8) are each equipped with a bearing end cover (2) and a bearing (12) that is limited in the bearing end cover (2). The bearing (12) is sleeved on the outer circumferential surface of the transmission shaft (1). The brake disc connecting base (15) is connected by a key installed on the transmission shaft (1).

9. The biomimetic thermoelectric magnetorheological brake according to claim 2, characterized in that: The housing is provided with a magnetorheological fluid injection channel (25) that communicates with the fluid channel (21); a thermoelectric sensor is installed on the brake mating disc (17), and electrical energy is generated and collected by the thermoelectric sensor based on the temperature difference on the brake mating disc (17).

10. A method for assembling a biomimetic thermoelectric magnetorheological brake as described in any one of claims 1-9, characterized in that: Step S1: Transition fit the key to the keyway of the drive shaft (1), put the brake disc connecting base (15) on the drive shaft (1), fix the first connecting ring (10) and the second connecting ring (11) on both sides of the annular convex ring (20) with screws, and then fix the rightmost brake disc (4) on the first connecting ring (10); Step S2: Install the skeleton oil seal (14) on the second housing (8), put the bushing (13) and bearing (12) on the drive shaft (1), and fix the bearing end cover (2) on the second housing (8); then install the 5 brake disc mating discs (17) and the remaining 5 brake discs (4) on the first connecting rod (23) and the second connecting rod (24) in the order of the first magnetic isolation fixing ring (5), brake mating disc (17), brake disc (4), and second magnetic isolation fixing ring (9); Step S3: First, install the coil (16) in the annular cavity of the coil magnetic shielding ring (18). Then, fix the coil magnetic shielding ring (18) on the first housing (3) with screws. Next, install the skeleton oil seal (14) on the inside of the first housing (3). Connect and fix the first housing (3) and the first magnetic shielding fixing ring (5) through the second connecting rod (24). Install the bearing (12) on the left side on the drive shaft (1). Then, fix the bearing end cover (2) on the first housing (3). Finally, inject the magnetorheological fluid to complete the assembly.

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