A magnetic drive linear-rotary transmission mechanism

Abstract

The present invention discloses a magnetic drive linear-rotary transmission mechanism, which includes a base, a linear moving member and a rotary member. The linear moving member includes a linear guide rod and a first permanent magnet mounting member arranged on the outer periphery of the linear guide rod, and a first permanent magnet arranged in a spiral pattern is provided on the first permanent magnet mounting member; the rotary member includes a second permanent magnet mounting member sleeved on the outer periphery of the linear guide rod, and a second permanent magnet arranged in a spiral pattern is provided on the second permanent magnet mounting member; at least one of the first permanent magnet mounting member and the second permanent magnet mounting member is set as a variable lift unit, and the lift of the spiral permanent magnet can be changed by adjusting the position of the permanent magnet mounting member, thereby changing the rotation speed of the rotary member, so that the magnetic drive linear-rotary transmission mechanism can adapt to the linear-rotary transmission under different external loads by adjusting the structural parameters (i.e., the spiral lift of the spiral-arranged permanent magnets), and solves the problem that the structural parameters of the existing linear-rotary conversion mechanism cannot be adjusted.

Description

Technical Field

[0001] The present invention belongs to the field of engineering applications, and relates to a conversion mechanism, in particular to a magnetic drive linear-rotary drive mechanism. Background Art

[0002] The main purpose of the linear-rotary conversion mechanism is to achieve the transformation between low-speed linear motion and high-speed rotation to meet the requirements of engineering applications. Common engineering application scenarios include that the subway door drives the linear motion of the lead screw nut through the rotation of the motor to achieve the opening and closing actions; in wave power generation, the mechanical energy of seawater can be converted into electrical energy by converting the up-and-down linear motion of seawater into high-speed rotation. At present, the linear-rotary conversion mechanism mainly includes two types: mechanical and magnetic drive:

[0003] (1) Mechanical linear-rotary conversion mechanism, which includes two forms: lead screw nut and rack and pinion. The lead screw nut is composed of a rotating nut and a lead screw (T-shaped lead screw or rolling resistance lead screw). When the nut rotates, it drives the lead screw to move linearly, or converts the torsional moment into axial force, with the characteristics of high precision, high efficiency and reversibility. The rack and pinion is the conversion between the linear motion of the rack and the rotation of the gear. By adjusting the number of teeth of the gear, different linear-rotation change ratios can be obtained. Essentially, both of them complete the conversion between low-speed linear reciprocating motion and high-speed torsional motion, and are currently widely used linear-rotary conversion mechanisms. The mechanical transmission system transmits motion through extrusion force, with high precision and more randomness, but the current solutions still have the following disadvantages:

[0004] (1) It cannot adapt to impact loads. Since the mechanical type transmits motion through contact force, when an impact load is applied, the contact force easily causes crushing damage at the contact point, resulting in the damage of the entire mechanism;

[0005] (2) The friction force between the linear moving part and the rotating part will affect the transmission efficiency. At the same time, due to the existence of contact, lubrication is required, which is not convenient for later use and maintenance;

[0006] (3) It cannot adapt to the marine environment. Seawater has high corrosiveness, and mechanical components are prone to corrosion. The contact points of the linear moving part and the rotating part are prone to corrosion due to the alternating contact stress, making the traditional anti-corrosion coating unable to effectively prevent corrosion;

[0007] (4) The transmission ratio is fixed and cannot be adjusted. When the mechanical linear-rotary conversion mechanism is processed, the transmission parameters cannot be adjusted.

[0008] (2) Magnetic drive linear-rotation conversion mechanism, which uses magnetic drive to replace the original lead screw nut mechanism / gear rack mechanism. Both the linear moving part and the rotating part of the magnetic drive linear-rotation conversion mechanism are composed of spiral permanent magnets with the same lift. When the linear moving part generates a linear displacement, the rotating part will be subjected to a torsional moment and follow to generate a torsional motion, and the transmission ratio is inversely proportional to the spiral lift of the spiral permanent magnet; conversely, when the rotating part generates a torsional motion, the linear moving part is subjected to a thrust and follows to generate a linear motion. The magnetic drive linear-rotation conversion mechanism transmits motion through non-contact magnetic force and has advantages such as overload protection and no friction. However, the current solution still has the following disadvantages:

[0009] (1) There is currently no mature commercial product for spiral permanent magnets. Generally, permanent magnets are discretized and then embedded or bonded on a cylinder to simulate spiral permanent magnets, resulting in high processing costs;

[0010] (2) When the linear moving part and the rotating part are determined, the lift of the spiral permanent magnet is determined and cannot be changed, and the structural parameters are fixed and non-adjustable. When facing a variable load external environment, this mechanism will not be able to ensure operation in the optimal working range.

[0011] In summary, both the existing mechanical and magnetic drive linear-rotation conversion mechanisms have the problem of non-adjustable structural parameters, thus being unable to adapt to different external loads. Therefore, it is necessary to improve this. Summary of the Invention

[0012] The purpose of the present invention is to provide a new type of magnetic drive linear-rotation transmission mechanism, which can change the lift of the spiral permanent magnet by adjusting the position of the permanent magnet mounting part, and further change the rotation speed of the rotating part, so that this mechanism can be adapted to different external loads by adjusting parameters to solve the problem of non-adjustable structural parameters existing in the above-mentioned existing linear-rotation conversion mechanism.

[0013] To achieve the above purpose, the present invention provides the following solution:

[0014] The present invention provides a magnetic drive linear-rotation transmission mechanism, including:

[0015] Base;

[0016] Linear moving part, the linear moving part includes a linear guide rod and a first permanent magnet mounting part arranged on the outer periphery of the linear guide rod; the linear guide rod is arranged on the upper surface of the base, and the linear guide rod can move along its own axial direction, and a first permanent magnet arranged in a spiral arrangement is provided on the first permanent magnet mounting part;

[0017] A rotating member, the rotating member includes a second permanent magnet mounting member sleeved on the outer periphery of the direct-acting guide rod, a second permanent magnet arranged in a spiral arrangement is provided on the second permanent magnet mounting member, and the second permanent magnet mounting member can rotate around the axial direction of the direct-acting guide rod;

[0018] At least one of the first permanent magnet mounting member and the second permanent magnet mounting member is set as a variable lift unit, the variable lift unit includes a spiral mounting belt with elasticity and a mounting belt telescoping mechanism, the first permanent magnet or the second permanent magnet arranged in a spiral arrangement is provided on the spiral mounting belt, at least one end of the spiral mounting belt is connected to the mounting belt telescoping mechanism, and the mounting belt telescoping mechanism is used to squeeze or stretch the spiral mounting belt to adjust the lift of the spiral mounting belt.

[0019] Optionally, the second permanent magnet mounting member is set as the variable lift unit; the first permanent magnet mounting member is fixed on the outer periphery of the direct-acting guide rod.

[0020] Optionally, the first permanent magnet mounting member is integrally formed with the direct-acting guide rod, and the first permanent magnet is embedded on the first permanent magnet mounting member.

[0021] Optionally, the mounting belt telescoping mechanism includes:

[0022] A flange plate, the flange plate is slidably mounted on the upper surface of the base through a flange seat; there are two flange plates, and the two flange plates are arranged oppositely, both ends of the direct-acting guide rod respectively penetrate through the two flange plates, and both ends of the spiral mounting belt are respectively rotatably connected to one of the flange plates through a rotating bearing;

[0023] A telescoping drive, the telescoping drive is connected to the flange seat to drive the two flange seats to approach or move away from each other.

[0024] Optionally, each flange seat is connected with one telescoping drive.

[0025] Optionally, the telescoping drive is a telescoping cylinder, a telescoping hydraulic cylinder, an electric telescoping rod or a lead screw configured with a motor, and the lead screw is threadedly connected to the flange seat.

[0026] Optionally, a chute parallel to the direct-acting guide rod is opened on the base, and a slider slidably matched with the chute is provided on the flange seat.

[0027] Optionally, the direct-acting guide rod includes a first section guide rod, a second section guide rod and a third section guide rod which are sequentially connected, the first permanent magnet mounting member is fixed on the second section guide rod; the first section guide rod and the third section guide rod are respectively slidably matched with the two flange plates.

[0028] Optionally, both the first guide rod and the third guide rod are slidably engaged with the corresponding flange through linear bearings; the linear bearings are installed on the flange.

[0029] Optionally, after the spiral mounting belt is unfolded, it forms a rectangular belt structure, and two rows of the second permanent magnets are arranged on the outer surface of the rectangular belt structure along its length direction.

[0030] Optionally, the second permanent magnet is a cylindrical permanent magnet.

[0031] Optionally, the spiral mounting belt is made of an elastic material. For example, it is made of spring steel.

[0032] Optionally, both the first permanent magnet mounting member and the second permanent magnet mounting member are set as the variable lift unit.

[0033] The present invention has achieved the following technical effects compared with the prior art:

[0034] The magnetic drive linear-rotary transmission mechanism proposed by the present invention, based on the magnetic drive principle, realizes the conversion between the linear motion of the linear moving member and the rotary motion of the rotary member. By setting at least one of the spiral permanent magnets in the linear moving member or the rotary member to a structure with adjustable lift, the lift of the spiral permanent magnet can be changed by adjusting the position of the permanent magnet mounting member, and thus the rotational speed of the rotary member can be changed. Specifically, when the linear motion speed of the linear moving member changes, the spiral mounting belt and the permanent magnets thereon can be adjusted in lift by squeezing or stretching the spiral mounting belt through the mounting belt telescopic mechanism, so as to ensure that the output rotational speed of the rotary member remains within the target range, enabling the magnetic drive linear-rotary transmission mechanism to adapt to linear-rotary transmission under different external loads by adjusting the structural parameters (i.e., the spiral lift of the spirally arranged permanent magnets), and solving the problem of non-adjustable structural parameters existing in the existing linear-rotary conversion mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0036] Figure 1 It is a schematic diagram of the overall structure of the magnetic drive linear-rotary transmission mechanism disclosed in the embodiments of the present invention;

[0037] Figure 2 It is a schematic cross-sectional structure diagram of the magnetic drive linear-rotary transmission mechanism disclosed in the embodiments of the present invention.

[0038] Among them, the attached drawing reference numerals are as follows:

[0039] 100, magnetic drive linear-rotary drive mechanism;

[0040] 1, base; 2, linear guide rod; 21, first section guide rod; 22, second section guide rod; 23, third section guide rod; 3, first permanent magnet; 4, spiral mounting belt; 5, flange; 6, flange seat; 7, chute; 8, rotating bearing; 9, linear bearing. Specific embodiments

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] One of the purposes of the present invention is to provide a novel magnetic drive linear-rotary drive mechanism, which can change the lift of the spiral permanent magnet by adjusting the position of the permanent magnet mounting member, and then change the rotation speed of the rotating member, so that the mechanism can be adjusted according to parameters to be applicable to different external loads, so as to solve the problem that the structural parameters of the existing linear-rotary conversion mechanism cannot be adjusted.

[0043] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0044] Embodiment 1

[0045] As Figure 1 - Figure 2As shown in the figure, this embodiment provides a magnetic drive linear-rotary drive mechanism 100, which mainly includes a base 1, a linear moving member and a rotary member. The linear moving member includes a linear guide rod 2 and a first permanent magnet mounting member disposed on the outer periphery of the linear guide rod 2. The linear guide rod 2 is disposed on the upper surface of the base 1, and the linear guide rod 2 can reciprocate along its own axis. The first permanent magnet mounting member is provided with first permanent magnets 3 arranged in a spiral pattern. The rotary member includes a second permanent magnet mounting member sleeved on the outer periphery of the linear guide rod 2. The second permanent magnet mounting member is provided with second permanent magnets arranged in a spiral pattern, and the second permanent magnet mounting member can rotate around the axis of the linear guide rod 2. In this embodiment, the second permanent magnet mounting member is set as a variable lift unit, while the first permanent magnet mounting member is fixedly installed on the outer periphery of the linear guide rod 2. The variable lift unit includes a spiral mounting belt 4 with elasticity and a mounting belt telescoping mechanism. The spiral mounting belt 4 is provided with second permanent magnets arranged in a spiral pattern. At least one end of the spiral mounting belt 4 is connected to the mounting belt telescoping mechanism, and the mounting belt telescoping mechanism is used to squeeze or stretch the spiral mounting belt 4 to adjust the lift (or called "spiral lift") of the spiral mounting belt 4. The first permanent magnet mounting member and the first permanent magnets 3 thereon can only move linearly back and forth along the axis of the linear guide rod 2. In actual operation, the first permanent magnet mounting member and the linear guide rod 2 can be a split structure. The first permanent magnet mounting member is wrapped around the outer layer of the linear guide rod 2 and can be fixed to the linear guide rod 2 by means of bolt connection, key connection and interference fit, etc. At the same time, the first permanent magnet mounting member and the linear guide rod 2 can also be an integrally formed structure, that is, the first permanent magnet mounting member is formed on the outer surface of the linear guide rod 2, and the first permanent magnets 3 are embedded in the first permanent magnet mounting member.

[0046] Furthermore, the installation belt telescopic mechanism in this embodiment mainly includes a flange 5 and a telescopic drive. The flange 5 is slidably mounted on the upper surface of the base 1 through a flange seat 6; there are two flanges 5, and the two flanges 5 are arranged oppositely. Both ends of the linear guide rod 2 penetrate through the two flanges 5 and are slidably engaged with the flanges 5. The spiral installation belt 4 is sleeved on the outer periphery of the distribution area of the first permanent magnet 3 on the linear guide rod 2, and both ends of the spiral installation belt 4 are rotatably connected to a flange 5 through a rotating bearing 8 respectively. The spiral installation belt 4 can rotate relative to the flange 5 under the action of the rotating bearing 8. The spiral installation belt 4 is arranged in a non-contact manner with the linear guide rod 2, the first permanent magnet mounting member, and the first permanent magnet 3, that is, there is no direct connection relationship between the spiral installation belt 4 and the linear guide rod 2, the first permanent magnet mounting member, and the first permanent magnet 3. When the linear guide rod 2 is the driving part, when the linear guide rod 2 makes a linear reciprocating movement, the spiral installation belt 4, as the outer rotating part, can make a torsional movement under the action of the torsional moment generated by the first permanent magnet 3 on the linear guide rod 2; when the spiral installation belt 4 is the driving part, the spiral installation belt 4, as the outer rotating part, makes a torsional movement, and the internal linear guide rod 2 can make an axial linear movement under the thrust force generated by the spiral installation belt 4. The above-mentioned telescopic drive is connected to the flange seat 6 and is used to drive the two flange seats 6 to approach or move away from each other. The transmission ratio between the linear moving part and the rotating part is inversely proportional to the helix pitch of the helically arranged permanent magnets. When the telescopic drive squeezes the two flange seats 6 and makes them approach each other (or is called "moving towards each other"), the spiral installation belt 4 is squeezed, its helix pitch decreases, and the corresponding rotational speed will increase. On the contrary, when the two flange seats 6 move away from each other (or is called "moving away from each other"), the spiral installation belt 4 is stretched, the helix pitch increases, and the corresponding rotational speed will decrease. The output rotational speed can be controlled by adjusting the distance between the two flange seats 6 through the telescopic drive.

[0047] In this embodiment, a chute 7 parallel to the linear guide rod 2 is opened on the base 1, and a slider slidably engaged with the chute 7 is arranged on the flange seat 6. In actual operation, one flange seat 6 can be fixedly arranged, and the other flange seat 6 is slidably engaged with the chute 7 through the slider; similarly, both flange seats 6 can also be slidably engaged with the chute 7 through the slider. Correspondingly, one flange seat 6 can be fixedly arranged, and the other flange seat 6 is connected to the telescopic drive to realize the relative adjustment between the two flange seats 6; or both flange seats 6 can be connected to a telescopic drive, which can also realize the relative adjustment between the two flange seats 6. Among them, there are many forms of setting the telescopic drive, such as a telescopic cylinder, a telescopic hydraulic cylinder, an electric telescopic rod, or a lead screw configured with a motor. When a lead screw configured with a motor is adopted, the lead screw, the flange seat 6, the slider on the flange seat 6, and the chute 7 together form a lead screw-slider mechanism to achieve the effect of driving the flange seat 6 to reciprocate along the chute 7.

[0048] In this embodiment, the direct-acting guide rod 2 includes a first-section guide rod 21, a second-section guide rod 22, and a third-section guide rod 23 that are sequentially connected and arranged. The first permanent magnet 3 mounting member is fixed to the second-section guide rod 22. The first-section guide rod 21 and the third-section guide rod 23 are respectively in sliding fit with two flange plates 5. As a preferred method, both the first-section guide rod 21 and the third-section guide rod 23 are in sliding fit with the corresponding flange plates 5 through linear bearings 9; the linear bearings 9 are mounted on the flange plates 5.

[0049] In this embodiment, after the spiral mounting belt 4 is unfolded, it has a rectangular strip structure. Two rows of second permanent magnets are arranged on the outer surface of the rectangular strip structure along its length direction, and the second permanent magnets on any one row are evenly spaced. The second permanent magnets are preferably cylindrical permanent magnets.

[0050] In this embodiment, the spiral mounting belt 4 is made of an elastic material, such as spring steel.

[0051] In this embodiment, the first permanent magnet is preferably a cylindrical permanent magnet. The cylindrical permanent magnets are installed in the spiral mounting belt 4 in a discretized form. Compared with the traditional columnar structure, the spiral mounting belt 4 greatly saves the processing cost of the rotating member.

[0052] In this embodiment, the above-mentioned "rotating member" can all be called "rotating part".

[0053] The working principle of the variable-lift magnetic drive linear-rotary drive mechanism in the above embodiment will be specifically described below.

[0054] In the traditional magnetic drive linear-rotary drive mechanism, since the lift τ of its spiral permanent magnet remains unchanged, the output rotational speed ω is only related to the linear motion speed ν, that is, ω = 2πν / τ. Therefore, when the linear motion caused by the external excitation is uncontrollable, the output rotational speed ω also shows uncontrollable characteristics. When the output rotational speed exceeds the load capacity of the system, the connection between the drive system and the external load must be disconnected, which will greatly reduce the working time of the drive system. However, for the variable-lift spiral permanent magnet in the variable-lift magnetic drive linear-rotary drive system in the above embodiment, the spiral lift of the outer spiral mounting belt 4 is adjusted by telescopic drive to achieve variable-speed drive. When the direct-acting guide rod 2 located on the inner circle moves linearly, the rotational speed of the outer spiral mounting belt 4 is related to the linear motion speed of the direct-acting guide rod 2 and its own spiral lift. While the linear motion changes due to the external excitation, the spiral lift of the spiral mounting belt 4 is adjusted to offset the change in the rotational speed ω and maintain the rotational speed ω within a stable range. Therefore, the working time of the system can be increased and the efficiency can be improved. In addition, the adjustment method of the spiral lift of the spiral mounting belt 4 is flexible and diverse. By changing the distance between the two flange plates, the lift can be changed, which can adapt to the linear-rotary drive under different external load conditions.

[0055] The variable lift magnetic drive linear-rotary drive mechanism disclosed in this embodiment can adjust the distance between two flange plates when the linear motion speed changes, so as to ensure that the output rotational speed remains within the target range. Taking seawater power generation as an example, the speed of ocean waves will constantly change. When the seawater speed is too high, the rotational speed will exceed the usable range, and thus this part of the energy has to be abandoned. By increasing the outer ring, that is, the spiral lift of the spiral mounting belt 4, the rotational speed of the outer ring (i.e., the spiral mounting belt 4) can be reduced, ensuring that the rotational output is maintained within the corresponding range and increasing the energy collection efficiency.

[0056] Embodiment 2

[0057] Compared with Embodiment 1, the difference in this embodiment is that both the first permanent magnet mounting member and the second permanent magnet mounting member are set as variable lift units, and other structures are the same as those in Embodiment 1, which will not be elaborated here. Regarding the spiral lift adjustment principle and its spiral lift, the difference from Embodiment 1 is only that relative adjustment should be maintained between the first permanent magnet mounting member and the second permanent magnet mounting member, and the technical effects formed are the same as those in Embodiment 1, which will not be elaborated here.

[0058] It should be noted that for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention, and any reference signs in the claims should not be regarded as limiting the claims involved.

[0059] Specific examples are used in the present invention to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, there will be changes in the specific implementation manner and application scope according to the idea of the present invention. In summary, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A magnetic drive linear-rotary transmission mechanism, characterized in that, it includes: a base; a linear moving member, the linear moving member includes a linear guide rod and a first permanent magnet mounting member disposed on the outer periphery of the linear guide rod; the linear guide rod is disposed on the upper surface of the base, and the linear guide rod can move along its own axial direction, and the first permanent magnet mounting member is provided with first permanent magnets arranged in a spiral pattern; a rotating member, the rotating member includes a second permanent magnet mounting member sleeved on the outer periphery of the linear guide rod, the second permanent magnet mounting member is provided with second permanent magnets arranged in a spiral pattern, and the second permanent magnet mounting member can rotate around the axial direction of the linear guide rod; at least one of the first permanent magnet mounting member and the second permanent magnet mounting member is provided as a variable lift unit, the variable lift unit includes an elastic spiral mounting belt and a mounting belt telescoping mechanism, the spiral mounting belt is provided with the first permanent magnet or the second permanent magnet arranged in a spiral pattern, at least one end of the spiral mounting belt is connected to the mounting belt telescoping mechanism, and the mounting belt telescoping mechanism is used to squeeze or stretch the spiral mounting belt to adjust the lift of the spiral mounting belt; the mounting belt telescoping mechanism includes a flange and a telescoping drive, the flange is slidably mounted on the upper surface of the base through a flange seat; there are two flanges, and the two flanges are arranged opposite to each other, both ends of the linear guide rod respectively penetrate through the two flanges, and both ends of the spiral mounting belt are respectively rotatably connected to one of the flanges through a rotating bearing, and the telescoping drive is connected to the flange seat to drive the two flange seats to approach or move away from each other.

2. The magnetic drive linear-rotary transmission mechanism according to claim 1, characterized in that, the second permanent magnet mounting member is provided as the variable lift unit; the first permanent magnet mounting member is fixed on the outer periphery of the linear guide rod.

3. The magnetic drive linear-rotary transmission mechanism according to claim 2, characterized in that, the first permanent magnet mounting member is integrally formed with the linear guide rod, and the first permanent magnet is embedded in the first permanent magnet mounting member.

4. The magnetic drive linear-rotary transmission mechanism according to claim 1, characterized in that, each of the flange seats is connected with a telescoping drive.

5. The magnetic drive linear-rotary transmission mechanism according to claim 1, characterized in that, a sliding groove parallel to the linear guide rod is opened on the base, and a sliding block slidably matched with the sliding groove is provided on the flange seat.

6. The magnetic drive linear-rotary transmission mechanism according to claim 1, characterized in that, the linear guide rod includes a first section guide rod, a second section guide rod and a third section guide rod which are sequentially connected and arranged, the first permanent magnet mounting member is fixed on the second section guide rod; the first section guide rod and the third section guide rod are respectively slidably matched with the two flange seats.

7. The magnetic drive linear-rotary transmission mechanism according to claim 6, characterized in that, Both the first guide rod and the third guide rod are slidably mated with the corresponding flange through linear bearings; the linear bearings are installed on the flange.

8. The magnetic drive linear-rotary drive mechanism according to claim 2 or 3, characterized in that After the spiral mounting belt is unfolded, it has a rectangular belt-like structure, and two rows of the second permanent magnets are arranged on the outer surface of the rectangular belt-like structure along its length direction.

9. The magnetic drive linear-rotary drive mechanism according to claim 1, characterized in that Both the first permanent magnet mounting member and the second permanent magnet mounting member are provided as the variable lift unit.

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