Hanger rotating device of shell-making drying line

Abstract

The invention discloses a hanger rotating device of a shell-making drying line, and relates to the technical field of investment casting, the hanger rotating device comprises a drying line main body, and the interior of the drying line main body is slidably connected with a plurality of upper hangers; the number of the lower lifting appliances is three, the lower lifting appliances are all located on the bottom face of the drying line body, the lower ends of the lower lifting appliances are connected with modules and automatic rotating mechanisms, and the automatic rotating mechanisms are arranged on the bottom face of the drying line body and used for enabling the modules to rotate automatically; the automatic rotating mechanism comprises a rotating lifting appliance and a friction track, and automatic rotation of the module under the condition that an extra power source is not added is achieved through cooperation of the rotating lifting appliance and the friction track. In the process that the module moves along the drying line main body, the rotating disk of the rotating lifting appliance rubs with the friction track to generate rotating power to drive the module to rotate, so that the use of power equipment such as a motor is avoided, the energy consumption and the equipment cost are reduced, and the economical efficiency and the reliability of a production line are improved.

Description

Technical Field

[0001] This invention relates to the field of investment casting technology, specifically to a rotating device for a shell drying line. Background Technology

[0002] The shell-making drying line is a crucial step in investment casting shell production, directly impacting casting precision and surface quality. Its core function is to achieve uniform hardening of the casting module through precise control of drying conditions. The essence of module drying is the migration and evaporation of moisture in the coating layer. Surface moisture evaporates directly through airflow, while deeper moisture diffuses to the surface via a humidity gradient. Traditionally, low-temperature, high-humidity, windless drying is used to prevent cracking. Currently, low-temperature air drying can be achieved using fast-drying silica sol or accelerators, but uniform airflow and temperature fluctuations ≤2℃ must be ensured; otherwise, burrs may easily appear on the casting surface.

[0003] Research revealed that existing technologies fix the modules to the drying line, allowing them to move along with it. However, the modules cannot rotate during drying and always face one direction, resulting in slow drying within the drying chamber. Alternatively, a motor with a synchronous belt drives gears or a combination of circular gears and racks to rotate the modules as they move along the drying line. However, this method is limited by the high cost, large size, and high energy consumption of the drying line's lifting fixtures.

[0004] Therefore, based on the above-mentioned search and combined with existing technology, a hanging fixture rotation device for shell drying line is proposed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a rotating device for the hanging fixtures of a shell-making and drying line to solve the problems mentioned in the background art. Addressing the shortcomings of the prior art, this invention provides a rotating device for the hanging fixtures of a shell-making and drying line, aiming to achieve the following objectives: 1) It automatically drives the module rotation using the friction force during the movement of the drying line without requiring an external power source, ensuring uniform drying; 2) It shortens drying time and improves drying efficiency; 3) It optimizes the spatial layout, avoids mutual interference during module rotation, and enhances the stability of equipment operation.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A hanging and rotating device for a shell drying line includes: a drying line body, wherein a plurality of upper hanging devices are slidably connected inside the drying line body; The lower lifting device consists of three units, all located on the bottom surface of the main body of the drying line. A module is connected to the lower end of each lower lifting device. An automatic rotation mechanism is provided on the bottom surface of the drying line body to allow the module to rotate automatically. The automatic rotation mechanism includes a rotating hanger and a friction track. When multiple automatic modules move along the main body of the drying line, the friction between the rotating hanger and the friction track causes the modules to rotate automatically during the drying process. The rotating lifting device includes a fixed shaft, a rotating disk, a cover, locking bolts, roller bearings, thrust ball bearings, and a connecting body.

[0007] Furthermore, the upper end of the fixed shaft is connected to the lower end of the upper lifting device, the roller bearing is fixedly sleeved on the outer circular wall of the fixed shaft, the rotating disk is fixedly sleeved on the outer circular wall of the outer ring of the roller bearing, the cover is disposed on the top surface of the rotating disk, a plurality of locking bolts pass through the cover and are threadedly connected to the top surface of the rotating disk, the connecting body is fixedly installed on the bottom surface of the rotating disk, the thrust ball bearing is fixedly sleeved on the outer circular wall of the fixed shaft, and the inner circular wall of the connecting body is fixedly sleeved on the outer circular wall of the outer ring of the thrust ball bearing.

[0008] Furthermore, the automatic rotation mechanism is evenly distributed along the main body of the drying line, and the automatic rotation mechanism independently drives the corresponding module to rotate.

[0009] Furthermore, a number of angle steels are provided on the inner side of the main body of the drying line, and a connecting bracket is fixedly installed on one side of the angle steel. The connecting bracket is welded to the main body of the drying line, and one side of the friction track is fixedly connected to one side of the angle steel.

[0010] Furthermore, the main body of the drying line is equipped with several stabilizing supports. The stabilizing supports are rotatably connected to guide rail pulleys two in the direction of which is perpendicular to the direction of the upper hanger. Two connecting plates are connected to both sides of the stabilizing supports. The two connecting plates are connected by a pin, and a bearing shaft is fixedly installed between the two connecting plates. The side of the connecting plate is rotatably connected to guide rail pulleys one in the direction of which is parallel to the direction of the upper hanger. The upper hanger is hung on the bearing shaft located on the left side.

[0011] Furthermore, a slot is reserved on the bottom surface of the connector, and the upper crossbar of the lower lifting device is fixed to the slot on the bottom surface of the connector by a pin.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. By utilizing the friction between the rotating hoist and the friction track, the kinetic energy of the drying line movement is converted into the rotational power of the modules, eliminating the need for additional motors or energy sources, resulting in a simple and reliable structure.

[0013] 2. Tests show that, under the same drying conditions, this device can shorten the drying time by about 15-20%, achieving rapid and uniform drying of the shell mold and avoiding local defects.

[0014] 3. The automatic rotating mechanism is evenly distributed along the main body of the drying line, and each module rotates independently without interfering with each other, maximizing the use of the internal space of the drying line.

[0015] 4. The synergy between the angle steel and the stabilizing bracket effectively suppresses module movement and swaying, ensures the stability of the friction track, and extends the equipment's lifespan. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the connection structure between the rotating lifting device and the friction track of the present invention; Figure 3 This is a schematic diagram of the connection structure between the rotating disk and the cap of the present invention; Figure 4 This is a schematic diagram of the connection structure between the connector and the upper lifting device of the present invention; Figure 5 for Figure 4 A schematic diagram of the partial structure of A in the middle.

[0017] In the diagram: 1. Drying line main body; 2. Connecting bracket; 3. Angle steel; 4. Automatic rotating mechanism; 5. Module; 6. Friction track; 7. Rotating hanger; 8. Lower hanger; 9. Fixed shaft; 10. Rotary disc; 11. Cover; 12. Locking bolt; 13. Roller bearing; 14. Thrust ball bearing; 15. Connecting body; 16. Upper hanger; 17. Guide rail pulley one; 18. Stabilizing bracket; 19. Connecting plate; 20. Bearing shaft; 21. Guide rail pulley two. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In one typical implementation of this application, please refer to Figures 1-5 A hanging and rotating device for a shell drying line includes a drying line body 1, and a plurality of upper hanging devices 16 are slidably connected inside the drying line body 1. There are three lower lifting devices 8, all located on the bottom surface of the main body 1 of the drying line. The lower end of each lower lifting device 8 is bolted to a module 5. Automatic rotation mechanism 4 is set on the bottom surface of the drying line body 1 to allow the module 5 to rotate automatically; The automatic rotation mechanism 4 includes a rotating hanger 7 and a friction track 6. When multiple automatic modules 5 move along the main body 1 of the drying line, the rotating hanger 7 rubs against the friction track 6, causing the modules 5 to rotate automatically during the drying process. The rotating lifting device 7 includes a fixed shaft 9, a rotating disk 10, a cover 11, a locking bolt 12, a roller bearing 13, a thrust ball bearing 14, and a connecting body 15.

[0020] The drying line body 1 serves as the basic framework of the entire device and is the main location for the movement and drying of module 5. In this embodiment, the drying line body 1 is equipped with guide rails to guide the movement path of the upper lifting device 16, ensuring that module 5 runs along a predetermined trajectory.

[0021] The drying line body 1 can accommodate multiple modules 5 for simultaneous drying. The length and width of the drying line body 1 can be adjusted according to actual production needs to adapt to different scales of production requirements.

[0022] It should be noted that several upper lifting devices 16 are slidably connected inside the main body 1 of the drying line. The upper lifting devices 16 move along the guide rails inside the main body 1 of the drying line. The upper lifting devices 16 are designed to stably support the module 5 and maintain the module 5 in a suspended state during movement. The moving speed of the upper lifting devices 16 can be adjusted according to the drying process requirements to ensure that the module 5 obtains sufficient drying time within the main body 1 of the drying line.

[0023] In this embodiment, the upper end of the upper hanger 16 is in the shape of a curved hook, which is used to connect with the moving mechanism inside the drying line body 1 to ensure that the upper hanger 16 can move together with the moving mechanism of the drying line body 1.

[0024] The lower end of the upper lifting device 16 is connected to the upper end of the fixed shaft 9 of the rotating lifting device 7 by a pin, which ensures the reliability of the connection and allows the rotating lifting device 7 to have a certain amount of room to move relative to the upper lifting device 16.

[0025] Three lower hangers 8 are provided, all located on the bottom surface of the main body 1 of the drying line. The three sets of lower hangers 8 provide stable support, evenly distribute the weight of the module 5, and prevent the module 5 from becoming eccentric or swaying during rotation. The upper end of each lower hanger 8 is connected to the bottom surface of the connecting body 15 of the rotating hanger 7, and the lower end is connected to the module 5 by bolts.

[0026] The lower lifting device 8 is connected as follows: the upper crossbar of the lower lifting device 8 is fixedly connected to the groove on the bottom surface of the connecting body 15 by a pin, which ensures the firmness of the connection and facilitates the quick installation and disassembly of the module 5. The lower end of the lower lifting device 8 has multiple threaded holes for fixing the module 5 to the lower lifting device 8 with bolts. The bolt connection method can be adjusted according to the size and weight of the module 5 to ensure the reliability of the connection.

[0027] The upper lifting device 16, the rotating lifting device 7, and the lower lifting device 8 together constitute a complete suspension system. This system can move with the main body 1 of the drying line and also realize the automatic rotation of the module 5. The key to this is the bearing system of the rotating lifting device 7, which allows the lower lifting device 8 and the module 5 to rotate relative to the upper lifting device 16 while maintaining rigid support in the vertical direction.

[0028] The automatic rotating mechanism 4 works on the principle of friction drive. When the module 5 moves along the drying line body 1 with the upper lifting device 16, the rotating disk 10 of the rotating device 7 contacts the friction track 6 and generates relative sliding. Due to the action of friction, the rotating disk 10 obtains rotational torque, which in turn drives the entire lower lifting device 8 and module 5 to rotate.

[0029] Specifically, when the upper lifting device 16 drives the rotating lifting device 7 to move along the main body 1 of the drying line, the outer edge of the rotating disk 10 of the rotating lifting device 7 contacts the friction track 6. Due to the friction, the rotating disk 10 is subjected to a force perpendicular to the direction of movement. This force generates a torque, causing the rotating disk 10 to rotate around the fixed axis 9. The rotation of the rotating disk 10 is transmitted to the lower lifting device 8 through the connecting body 15, ultimately driving the module 5 to rotate.

[0030] The working process of the automatic rotating mechanism 4 is divided into the following stages: 1. Contact phase: When the rotating lifting device 7 moves to the position of the friction track 6, the rotating disk 10 begins to contact the friction track 6; 2. Start-up phase: Due to friction, the rotating disk 10 begins to rotate, driving the connecting body 15 and the lower lifting device 8 to rotate; 3. Stable rotation stage: As the rotating lifting device 7 continues to move, the rotating disk 10 remains in contact with the friction track 6, and the module 5 rotates at a stable speed; 4. Disengagement stage: When the rotating lifting device 7 moves to the end of the friction track 6, the rotating disk 10 disengages from the friction track 6, and the module 5 stops rotating.

[0031] The automatic rotating mechanism 4 is evenly distributed along the main body 1 of the drying line, ensuring that the module 5 can rotate multiple times within the main body 1 of the drying line, thereby achieving a more uniform drying effect. The spacing of the automatic rotating mechanism 4 can be adjusted according to the drying process requirements to accommodate modules 5 of different sizes and weights.

[0032] Each automatic rotation mechanism 4 independently drives the corresponding module 5 to rotate.

[0033] In this embodiment, the upper end of the fixed shaft 9 is connected to the lower end of the upper hanger 16 by a pin. The outer cylindrical wall of the fixed shaft 9 has a portion for mounting the roller bearing 13, which is fixedly sleeved on the outer cylindrical wall of the fixed shaft 9. Below the roller bearing 13, the outer cylindrical wall of the fixed shaft 9 has a portion for mounting the thrust ball bearing 14. The thrust ball bearing 14 is fixedly sleeved on the outer cylindrical wall of the fixed shaft 9 to bear the axial load of the module 5.

[0034] The rotating disk 10 is fixedly sleeved on the outer circular wall of the outer ring of the roller bearing 13, allowing the rotating disk 10 to rotate freely relative to the fixed shaft 9, while maintaining stable support through the roller bearing 13. There is a gap between the rotating disk 10 and the fixed shaft 9, which ensures that the rotating disk 10 will not contact the fixed shaft 9 during rotation, thereby reducing friction and wear.

[0035] A cover 11 is disposed on the top surface of the rotating disk 10, and is threadedly connected to the top surface of the rotating disk 10 by several locking bolts 12 passing through the cover 11. The locking bolts 12 ensure that the cover 11 is firmly fixed to the rotating disk 10 and will not loosen or fall off during operation. The main function of the cover 11 is to protect the rotating disk 10 and the roller bearing 13, preventing dust and impurities from entering the rotating system.

[0036] In this embodiment, the connector 15 is fixedly installed on the bottom surface of the rotating disk 10, so that the connector 15 can rotate together with the rotating disk 10.

[0037] The inner circular wall of the connecting body 15 is fixedly sleeved with the outer circular wall of the outer ring of the thrust ball bearing 14. A groove is reserved on the bottom surface of the connecting body 15, and the upper horizontal bar of the lower hanger 8 is fixed to the bottom surface of the connecting body 15 by a pin and the groove.

[0038] In this embodiment, one side of the friction track 6 is fixedly connected to one side of the angle steel 3. The angle steel 3 is the supporting structure for the friction track 6 and is located inside the drying line body 1. Multiple holes are pre-drilled on the angle steel 3 for fixing it in a suitable position using bolts. By inserting bolts into the holes on the angle steel 3, the position of the angle steel 3 can be adjusted according to actual needs, thereby adjusting the height and angle of the friction track 6.

[0039] A connecting bracket 2 is fixedly installed on one side of the angle steel 3, and the connecting bracket 2 is welded to the main body 1 of the drying line.

[0040] The working principle of the friction track 6 is based on the action of friction. When the rotating hanger 7 moves along the main body 1 of the drying line, the outer edge of the rotating disk 10 contacts the friction track 6. Due to the action of friction, the rotating disk 10 is subjected to a force perpendicular to the direction of movement. This force perpendicular to the direction of movement generates a torque, causing the rotating disk 10 to rotate around the fixed axis 9.

[0041] In this embodiment, a guide rail pulley 21 is rotatably connected inside the stabilizing bracket 18 via a rotating shaft. The direction of the guide rail pulley 21 is perpendicular to the direction of the upper lifting device 16. Two connecting plates 19 are connected to both sides of the stabilizing bracket 18 via pins, forming a movable connection structure. A bearing shaft 20 is fixedly installed between the two connecting plates 19, and the bearing shaft 20 supports the upper lifting device 16.

[0042] The stabilizing bracket 18 is fixed to the main body 1 of the drying line using a conventional connection method.

[0043] The guide rail pulley system includes guide rail pulley 17 and guide rail pulley 21. Guide rail pulley 17 is rotatably connected to the side of the connecting plate 19 via a pivot, and the direction of guide rail pulley 17 is parallel to the direction of the upper hanger 16. The upper end of the upper hanger 16 is bent into a hook, and the upper hanger 16 is hung on the bearing shaft 20 located on the left side. When the module 5 moves along the drying line body 1, guide rail pulley 17 rolls along the inner top and inner bottom surfaces of the drying line body 1, which allows the connecting plate 19 to be adjusted appropriately according to the movement of the module 5.

[0044] The guide rail pulley 21 is rotatably connected to the inside of the stabilizing bracket 18 via a rotating shaft, and the direction of the guide rail pulley 21 is perpendicular to the direction of the upper lifting device 16. When the stabilizing bracket 18 moves, the guide rail pulley 21 rolls along both sides of the inside of the drying line body 1, which allows the stabilizing bracket 18 to remain stable in the horizontal direction.

[0045] The working process of the guide rail pulley system is as follows: 1. Initial state: Module 5 is stationary inside the main body 1 of the drying line, and guide rail pulley 17 and guide rail pulley 21 are in their initial positions.

[0046] 2. Movement begins: When module 5 begins to move along the main body 1 of the drying line, the upper hoist 16 drives the guide rail pulley 17 to move.

[0047] 3. Vertical guidance: The guide rail pulley 17 rolls along the inner top and inner bottom surfaces of the drying line body 1, which causes the connecting plate 19 on the left to move, thereby maintaining the stability of the module 5 in the vertical direction.

[0048] 4. Horizontal guidance: The movement of the left connecting plate 19 causes the stabilizing bracket 18 to move. The movement of the stabilizing bracket 18 causes the guide rail pulley 21 to roll along both sides of the interior of the drying line body 1, which causes the right connecting plate 19 and the guide rail pulley 17 to move accordingly.

[0049] 5. Synergistic effect: The synergistic effect of guide rail pulley 17 and guide rail pulley 21 guides the movement of module 5 in both vertical and horizontal directions, improving the stability of module 5 during movement.

[0050] The movement and rotation process of module 5 within the main body 1 of the drying line is as follows: 1. Initial state: Module 5 is suspended from the upper hanger 16 by the lower hanger 8, and the upper end of the upper hanger 16 is attached to the bearing shaft 20. At this time, module 5 is in a stationary state, ready to enter the main body 1 of the drying line.

[0051] 2. Entering the drying line: When the main body 1 of the drying line starts, the upper lifting device 16 begins to move along the guide rail inside the main body 1 of the drying line. The upper lifting device 16 drives the rotating lifting device 7 and the module 5 to move together.

[0052] 3. Contact with the friction track: When the rotating lifting device 7 moves to the position of the friction track 6, the outer edge of the rotating disk 10 begins to contact the friction track 6. Due to the action of friction, the rotating disk 10 is subjected to a force perpendicular to the direction of movement.

[0053] 4. Start rotation: The torque generated by friction causes the rotating disk 10 to begin rotating around the fixed axis 9. The rotation of the rotating disk 10 is transmitted to the lower lifting device 8 through the connecting body 15, and the lower lifting device 8 begins to drive the module 5 to rotate.

[0054] 5. Stable Rotation: As the rotating hoist 7 continues to move along the friction track 6, the rotating disk 10 remains in contact with the friction track 6, and the module 5 rotates at a stable speed. The roller bearing 13 and the thrust ball bearing 14 significantly reduce the friction between the rotating disk 10 and the fixed shaft 9, ensuring smooth rotation.

[0055] 6. Disengagement from the friction track: When the rotating lifting device 7 moves to the end of the friction track 6, the rotating disk 10 disengages from the friction track 6, and the module 5 stops rotating. At this point, the module 5 has completed one rotation cycle.

[0056] 7. Continue moving: The upper hoist 16 continues to move the module 5 along the main body 1 of the drying line until it encounters the next automatic rotating mechanism 4. During this process, the module 5 remains stationary.

[0057] 8. Repeated Rotation: When module 5 encounters the next automatic rotation mechanism 4, the above rotation process is repeated. The automatic rotation mechanism 4 is evenly distributed along the main body 1 of the drying line, so that module 5 can rotate multiple times during the drying process.

[0058] 9. Drying Completed: The drying process is complete when module 5 moves to the end of the main body 1 of the drying line. Module 5 is then removed for subsequent processes.

[0059] Throughout the process, the stabilizing guidance system remains in place. Guide rail pulley 17 rolls along the inner top and bottom surfaces of the drying line body 1, while guide rail pulley 21 rolls along both sides of the inner surface of the drying line body 1, ensuring the stability of module 5 during movement and preventing swaying and deviation.

[0060] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A hanging and rotating device for a shell-making drying line, comprising a drying line body, wherein a guide rail is provided inside the drying line body and an upper hanging device is slidably connected thereto, the upper hanging device being used to suspend modules; characterized in that, The bottom surface of the main body of the drying line is provided with a lower lifting device, which is fixedly connected to the module through a detachable connector; The main body of the drying line is also equipped with an automatic rotation mechanism, which includes a rotating hanger and a friction track. The rotating hanger is rotatably connected to the upper hanger, and the friction track is fixed to the inner side of the main body of the drying line and extends along the direction of movement. When the upper hanger drives the rotating hanger to move along the guide track, the rotating hanger comes into frictional contact with the friction track, generating a rotational torque based on a passive friction drive mechanism, so that the module rotates automatically relative to the upper hanger, realizing three-dimensional uniform heating and efficient heat exchange during the drying process.

2. The hanging fixture rotating device for a shell drying line according to claim 1, characterized in that, The rotating lifting device includes a fixed shaft, a rotating disk, a roller bearing, and a thrust ball bearing. The upper end of the fixed shaft is hinged to the upper lifting device. The roller bearing is sleeved on the outer circular wall of the fixed shaft. The rotating disk is fixed to the outer ring of the roller bearing. The thrust ball bearing is sleeved on the outer circular wall of the fixed shaft and located below the roller bearing, which is used to bear the axial load of the module and ensure rotational stability.

3. The hanging fixture rotating device for a shell drying line according to claim 2, characterized in that, The rotating lifting device also includes a connecting body, which is fixed to the bottom surface of the rotating disk and hinged to the upper end of the lower lifting device via a pin, forming a modular connection structure that can be quickly assembled and disassembled.

4. A hanging fixture rotating device for a shell-making and drying line according to claim 2 or 3, characterized in that, The rotating lifting device further includes a cover and locking bolts. The cover is fixed to the top surface of the rotating disk by the locking bolts, forming a fully sealed protection system.

5. The hanging fixture rotating device for a shell drying line according to claim 1, characterized in that, The friction track is fixed to the inner side of the drying line body by an angle steel bracket. The angle steel bracket is provided with an array of adjustment holes for dynamically adjusting the height, angle and contact pressure of the friction track.

6. The hanging fixture rotating device for a shell drying line according to claim 1, characterized in that, The device also includes a stabilizing guide system, which includes a guide rail pulley one and a guide rail pulley two. The guide rail pulley one rolls along the vertical direction of the drying line body and contacts the top and bottom surfaces of the guide rail. The guide rail pulley two rolls along the horizontal direction of the drying line body and contacts both sides of the guide rail, working together to suppress the offset and vibration during the movement of the module.

7. The hanging fixture rotating device for a shell drying line according to claim 6, characterized in that, The first guide rail pulley is linked to the upper lifting device through an adjustable connecting plate, and the second guide rail pulley is fixedly connected to the main body of the drying line through a stabilizing bracket. The stabilizing bracket and the adjustable connecting plate form an adaptive linkage structure through a hinge mechanism to compensate for the deviation of the module's motion trajectory in real time.

8. The hanging fixture rotating device for a shell drying line according to claim 1, characterized in that, The lower lifting device is provided in three parts, arranged in an equilateral triangle on the bottom surface of the drying line body.

9. The hanging fixture rotating device for a shell drying line according to claim 5, characterized in that, Multiple automatic rotating mechanisms are evenly distributed along the main body of the drying line, and the spacing between adjacent mechanisms is adjustable, so that the module undergoes periodic rotation during the drying process.

10. The hanging fixture rotating device for a shell drying line according to claim 2, characterized in that, The outer edge of the rotating disk forms an asymmetrical contact interface with the friction track, and the friction torque is efficiently transmitted through a composite support system of roller bearings and thrust ball bearings.

Images