A recirculating magnetron

Abstract

The utility model provides a can circulate back and forth magnetic adjuster belongs to fitness equipment technical field, the utility model discloses: reduction gear set, driving mechanism is used for driving reduction gear set rotation, at least one eccentric cam pair is engaged with reduction gear set, swing arm one end is connected with eccentric cam pair, and the other end is rotatably connected with the reluctance device, and driving mechanism drives reduction gear set to drive eccentric cam pair rotation, and swing arm makes the reluctance device swing up and down, the utility model discloses through eccentric cam pair drive swing arm and realizes 360 DEG rotation, is not restricted by rotation angle, is convenient for control, even if control is out of control, resets and can restore normal, and movement is stable, and only one direction rotation can complete the relative distance adjustment of reluctance and flywheel.

Description

Technical Field

[0001] This utility model relates to the field of fitness equipment technology, and in particular to a reciprocating magnetic regulator. Background Technology

[0002] A magnetic adjuster, also known as a "reciprocating magnetic adjuster," is a core device in fitness equipment used to adjust the resistance of resistance wheels. It is primarily used in fitness equipment with flywheels (such as rowing machines and exercise bikes). Its core function is to dynamically adjust the resistance of the exercise equipment by controlling the relative distance between the magnetic assembly and the flywheel, thereby changing the strength of the magnetic force between them (the resistance generated by cutting magnetic lines of force). This allows users to meet different exercise intensity needs.

[0003] Traditional magnetic reluctance adjusters use a combination of components, including a motor, gearbox, and steel wire, to adjust the distance between the magnetic assembly and the flywheel. This method is complex, requiring multiple devices to work together to adjust the magnetic reluctance, resulting in structural redundancy.

[0004] Utility model patent CN 213049143 U discloses a wheel resistance adjustment device based on electromagnetic control, including a motor, a magnetic tile, a potentiometer, a circuit board, a connector, a connecting rod, and an output gear. The connector is electrically connected to the circuit board, and an external controller can provide power to the circuit board through the connector. The motor is electrically connected to the circuit board, and the external controller can provide power to the motor and control its operation through the connector and the circuit board. The potentiometer is electrically connected to the circuit board, and the external controller can provide power to the potentiometer and receive the output voltage sent by the potentiometer through the connector and the circuit board. The motor drives the magnetic tile to move through the output gear and the connecting rod. The output voltage of the potentiometer changes with the rotation angle of the output gear. The external controller can drive the magnetic tile to move through the motor and determine the movement angle of the magnetic tile through the output voltage of the potentiometer.

[0005] The aforementioned utility model patent integrates the motor reducer and the magnetic assembly, using an incomplete gear to drive a connecting rod to adjust the distance between the magnetic assembly and the flywheel. While the structure is compact, it suffers from the following drawbacks:

[0006] The rotation angle is limited, making it impossible to achieve 360° rotation. The stroke can easily lead to irreversible damage and structural failure of the device, increasing maintenance costs.

[0007] It requires switching between forward and reverse rotation, and is prone to vibration when adjusting quickly with a large stroke. Utility Model Content

[0008] In view of this, in order to solve the technical problem that the above-mentioned utility model patent has limited rotation angle, which is easy to cause irreversible damage and structural failure of the device, this utility model provides a reciprocating magnetic adjuster, which drives the swing arm to achieve 360° rotation through an eccentric cam pair, which is not limited by the rotation angle, is easy to control, and can be restored to normal by resetting even if the control is out of control. The movement is smooth, and the relative distance between the magnetic resistance and the flywheel can be adjusted by rotating in only one direction.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A reciprocating magnetizer, comprising:

[0011] Reduction gear set;

[0012] A drive mechanism is used to drive the reduction gear set to rotate;

[0013] At least one eccentric cam pair meshes with the reduction gear set;

[0014] The swing arm is connected at one end to the eccentric cam pair and at the other end to the magnetic reluctance device.

[0015] The drive mechanism drives the reduction gear set to rotate the eccentric cam pair, and the swing arm causes the magnetic reluctance device to swing up and down.

[0016] Preferably, the number of the eccentric cam pair is one; one end of the magnetoresistive device is connected to the swing arm, and the other end is rotatably connected to the housing of the magnetoresistive device.

[0017] Preferably, there are two eccentric cam pairs and two swing arms. Both eccentric cam pairs mesh with the reduction gear set, and the other end of both swing arms is rotatably connected to the magnetic reluctance device.

[0018] Preferably, the lower surface of the iron plate of the magnetic reluctance device is provided with a first magnetic reluctance gear and a second magnetic reluctance gear, and the other ends of the two swing arms are respectively connected to the first magnetic reluctance gear and the second magnetic reluctance gear, and the first magnetic reluctance gear and the second magnetic reluctance gear mesh.

[0019] Preferably, the drive mechanism is a motor, and its output end is connected to the reduction gear set via a worm gear.

[0020] Preferably, the motor is a DC motor.

[0021] Preferably, it further includes a position sensor disposed on the eccentric cam pair for monitoring the rotation angle of the eccentric cam pair.

[0022] Compared to existing technologies, it has the following beneficial effects:

[0023] The reciprocating magnetic adjuster provided by this utility model achieves 360° rotation by driving the swing arm through an eccentric cam pair. It is not limited by the rotation angle, making it easy to control. Even if control fails, it can be restored to normal operation by resetting. The movement is smooth, and the relative distance between the magnetic reluctance and the flywheel can be adjusted by rotating in only one direction. Compared with the prior art, it has the following advantages:

[0024] (1) Core Advantage 1: Highly efficient and reliable motion control, breaking through angle limitations

[0025] The eccentric cam pair simplifies the drive logic. Only unidirectional uniform or variable speed rotation of the drive motor needs to be controlled, eliminating the need for complex forward / reverse control or position feedback closed loops. It is unaffected by the precision errors of the limit angles of traditional stepper motors or servo motors, and continuous rotation makes it easier to maintain long-cycle precision.

[0026] Fast dynamic response: The eccentric cam transmits motion directly and quickly, without the time delay of switching drive direction.

[0027] Core advantage (2): It can be safely reset after runaway, and its robustness is significantly enhanced.

[0028] The high-pair motion characteristics of the contact surface between the eccentric cam and the rocker arm allow external force disturbances (such as reset operations) to directly move the cam or rocker arm to achieve position reset when the drive is paused or out of control.

[0029] The mechanism itself has no dead zone hard limit (such as card slot or block), and physically has the ability to restart at any angle.

[0030] It has the following advantages:

[0031] Strong fault resistance: When the control system crashes, the position of the reluctance or flywheel can be realigned manually or automatically without the need for forced stop or disassembly of the mechanism.

[0032] Avoid mechanical damage: Traditional angle-limited designs may cause rack breakage or limit block failure if the travel is exceeded, while this mechanism can avoid permanent damage through free reset.

[0033] Core Advantage (3): Smooth movement and low vibration, extending equipment lifespan

[0034] The cam lift curve can be designed with a smooth, continuous transition (such as an improved sine curve) to ensure gradual changes in the rocker arm acceleration. Single-direction rotation drive can avoid the impact and noise introduced by backlash (backlash) between forward and reverse rotation.

[0035] It has the following advantages:

[0036] Low vibration and noise: Smooth motion characteristics reduce equipment noise and mechanical friction, and reduce interference to precision sensors.

[0037] Extending component life: The high contact strength of the combination of eccentric cam and needle roller bearing, along with constant directional rotation, reduces impact load, lowers wear, and extends the durability of the magnetizer.

[0038] In summary, the core technological advantage of this utility model's reciprocating magnetic regulator lies in "achieving 360° unrestricted, unidirectional continuous rotation through a precisely designed eccentric cam pair":

[0039] Easy to control: driven by a single-acting motor, no reversing required;

[0040] Reliable reset: Fault-tolerant design without hard limit constraints;

[0041] Smooth operation: The smooth curve of the eccentric cam results in quiet operation;

[0042] Long lifespan guarantee: Simple and reliable structure, significantly reduced wear rate. Attached Figure Description

[0043] Figure 1 A schematic diagram of a single-cam reciprocating magnetic adjuster;

[0044] Figure 2 A schematic diagram of a dual-cam reciprocating magnetic regulator;

[0045] In the figure, 1 is the reduction gear set; 2 is the drive mechanism; 3 is the eccentric cam pair; 4 is the swing arm; 5 is the magnetic reluctance device; 51 is the magnet base; 52 is the housing; 6 is the first magnetic reluctance gear; and 7 is the second magnetic reluctance gear. Detailed Implementation

[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0047] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0049] like Figure 1-2 As shown, this utility model provides a reciprocating magnetic regulator, comprising:

[0050] The reduction gear set 1 is composed of multiple meshing reduction gears. The number of these reduction gears can be selected according to actual needs.

[0051] The drive mechanism 2 is used to drive the reduction gear set 1 to rotate. In this invention, the drive mechanism 2 is preferably a motor, more preferably a DC motor. The output end of the DC motor meshes with the reduction gear set 1 through a worm gear, and the rotation of the DC motor drives the reduction gear set 1 to rotate.

[0052] At least one eccentric cam pair 3 meshes with the reduction gear set 1. The eccentric cam pair 3, as a special form of cam mechanism, mainly consists of an eccentric gear and a crank mounted on the eccentric gear. The eccentric cam pair 3 is a conventional mechanical structure in this field and will not be described in detail here. It can be selected according to actual needs.

[0053] The swing arm 4 is connected at one end to the eccentric cam pair 3 and at the other end to the housing 52 of the magnetic reluctance device 5.

[0054] The drive mechanism 2 drives the reduction gear set 1 to rotate the eccentric cam pair 3, and the swing arm 4 causes the magnetic reluctance device 5 to swing up and down.

[0055] In this utility model, the rotation of the drive mechanism 2 drives the reduction gear set 1 to rotate, which in turn drives the swing arm 4 to move up and down, which in turn drives the magnet seat 51 and magnet and other components in the magnetic resistance device 5 to swing up and down.

[0056] like Figure 1 As shown, in this invention, there is one eccentric cam pair 3; one end of the magnetic reluctance device 5 is connected to the swing arm 4, and the other end is rotatably connected to the housing of the magnetic reluctance device 5. This is referred to as a single-cam reciprocating magnetic adjuster.

[0057] like Figure 2As shown, in this invention, there are two eccentric cam pairs 3 and two swing arms 4. Both eccentric cam pairs 3 mesh with the reduction gear set 1, and the other ends of both swing arms 4 are rotatably connected to the magnetic reluctance device 5. This is called a double-cam reciprocating magnetic adjuster.

[0058] In this invention, a first reluctance gear 6 and a second reluctance gear 7 are provided on the lower surface of the iron plate of the reluctance device 5. The other ends of the two swing arms 4 are respectively connected to the first reluctance gear 6 and the second reluctance gear 7, and the first reluctance gear 6 and the second reluctance gear 7 mesh. Its advantages are as follows:

[0059] Synchronous motion and precise control: The meshing design of the first reluctance gear 6 and the second reluctance gear 7 ensures that the movement of the two gears is highly synchronized, achieving synchronized swing angles of the two swing arms and preventing left and right swaying when the magnetic adjustment group moves. When one gear rotates due to external force or magnetic force, the other gear will immediately respond in the opposite direction or at a fixed speed ratio, thereby driving the two swing arms 4 to move in a coordinated manner.

[0060] Advantages: Reduces motion hysteresis and position error, improving the control accuracy and repeatability of the system.

[0061] Enhanced reliability and extended lifespan: The gear meshing structure is more wear-resistant, distributes load stress, and prevents point overload. The steel plate provides rigid support, protecting the gears from impacts or vibrations.

[0062] Advantages: Reduced mechanical wear and failure rate, extending device lifespan. The system is more durable and requires less maintenance in high-load or frequent-movement environments.

[0063] In summary, the core advantage of this design lies in achieving synchronization of mechanical motion and optimization of the magnetic circuit through meshing gears, thereby improving the overall system performance, efficiency, and reliability. It is particularly suitable for reluctance-related applications (such as position sensing, torque measurement, or stepper motors), but has widespread application value in any device requiring precise motion control. Based on the analysis of similar patent cases, these advantages have been experimentally verified, significantly reducing energy consumption and improving output accuracy.

[0064] In this invention, the drive mechanism 2 is a motor, and its output end is connected to the reduction gear set 1 via a worm gear. The motor is preferably a DC motor.

[0065] This invention also includes a position sensor (such as an encoder) mounted on the eccentric cam pair 3 to monitor the rotation angle of the eccentric cam pair 3. This enables closed-loop control of the eccentric cam pair 3, adjusting the speed or torque of the drive motor based on the actual angle feedback to ensure that the rotation stops at a preset target position (such as the start or end point of the cam push stroke or a specific working point), significantly improving the system's positioning accuracy and repeatability.

[0066] In summary, the biggest advantage of this utility model with the addition of an eccentric cam pair 3 position sensor is that it provides the most direct and critical mechanical motion information—angle / position—thereby achieving precise closed-loop control, positioning, synchronization and safety assurance, and greatly improving the performance, reliability and intelligence level of the entire cam drive mechanism 2.

[0067] The above are merely preferred embodiments of this utility model; however, the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and its improved concept, should be included within the scope of protection of this utility model.

Claims

1. A reciprocating magnetic modulator, characterized in that, include: Reduction gear set; A drive mechanism is used to drive the reduction gear set to rotate; At least one eccentric cam pair meshes with the reduction gear set; The swing arm is connected at one end to the eccentric cam pair and at the other end to the magnetic reluctance device. The drive mechanism drives the reduction gear set to rotate the eccentric cam pair, and the swing arm causes the magnetic reluctance device to swing up and down.

2. The reciprocating magnetic modulator according to claim 1, characterized in that, The number of eccentric cam pairs is one; one end of the magnetoresistive device is connected to the swing arm, and the other end is rotatably connected to the housing of the magnetoresistive device.

3. A reciprocating magnetic modulator according to claim 1, characterized in that, The number of eccentric cam pairs and rocker arms are both two. Both eccentric cam pairs mesh with the reduction gear set, and the other end of both rocker arms is rotatably connected to the magnetic reluctance device.

4. A reciprocating magnetic modulator according to claim 3, characterized in that, The lower surface of the iron plate of the magnetic reluctance device is provided with a first magnetic reluctance gear and a second magnetic reluctance gear. The other ends of the two swing arms are respectively connected to the first magnetic reluctance gear and the second magnetic reluctance gear, and the first magnetic reluctance gear and the second magnetic reluctance gear mesh.

5. A reciprocating magnetic modulator according to claim 1, characterized in that, The drive mechanism is a motor, and its output end is connected to the reduction gear set through a worm gear.

6. A reciprocating magnetic modulator according to claim 5, characterized in that, The motor is a DC motor.

7. A reciprocating magnetic modulator according to any one of claims 1-6, characterized in that, It also includes a position sensor disposed on the eccentric cam pair for monitoring the rotation angle of the eccentric cam pair.

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