Segmented cross-zone magnetic coupling mechanism

Abstract

The present application provides a segmented cross-zone magnetic coupling mechanism. The segmented cross-zone magnetic coupling mechanism is provided with a compensation coil between the first transmitting coil and the second transmitting coil arranged at intervals, that is, the segmented cross-zone power supply area. The compensation coil fills the magnetic field trough between the first transmitting coil and the second transmitting coil, thereby minimizing the impact of power shock. The segmented cross-zone magnetic coupling mechanism provided by the present application can be used for wireless power transmission of rail transit vehicles during dynamic driving, and can effectively alleviate the problems of power pulses, reduced efficiency, coupling detuning, etc. that occur in the segmented cross-zone power supply area, improve the stability and efficiency of the rail transit dynamic wireless power transmission system, and can meet the power supply requirements of the kilowatt-level high-power rail transit dynamic wireless power transmission system.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless power transmission, and in particular to a segmented cross-zone magnetic coupling mechanism. Background Art

[0002] Wireless power transmission technology refers to the contactless transmission of electrical energy in space through soft media such as magnetic and electric fields. It represents a completely new power supply model, distinct from traditional contact-based power supply. Wireless power transmission technologies are primarily categorized into six types: magnetic resonance, magnetic induction coupling, ultrasonic wireless power transmission, photoelectric wireless power transmission, microwave, and electric field coupling. Magnetic induction coupling, among others, uses near-field electromagnetic coupling to achieve short-range power transmission. Magnetic induction coupling is currently the most widely used and mature technology in the power supply sector.

[0003] In magnetic induction coupling technology, the magnetic coupling mechanism is the core component that enables wireless power transmission through resonant electromagnetic induction. Magnetic coupling mechanisms can be designed with a variety of coil types. Traditionally, rail transit dynamic wireless power transmission systems widely use long rail coils as transmitting coils. In rail transit dynamic wireless power transmission systems, when the receiving coil switches across a segmented transmitting coil, this is called a segmented crossover. When the receiving coil reaches the transmitting coil switching position, the magnetic field between the two transmitting coils is weaker than that in the area around the center of the transmitting coil. Therefore, the load power of the rail wireless power transmission decreases during the transmitting coil switching process. This can lead to problems such as low efficiency, power pulsation, and coupling detuning in rail transit dynamic wireless power transmission systems. Summary of the Invention

[0004] In order to solve the problem that the magnetic field drop between the transmitting coils causes the receiving coil power to drop, the present application provides a segmented cross-zone magnetic coupling mechanism.

[0005] A segmented cross-zone magnetic coupling mechanism comprises a first transmitting coil and a second transmitting coil which are arranged at intervals; and a compensation coil which is arranged between the first transmitting coil and the second transmitting coil.

[0006] In one embodiment, the first transmitting coil and the second transmitting coil are located close to each other at their ends within an area surrounded by the compensation coil.

[0007] In one embodiment, the segmented cross-zone magnetic coupling mechanism further includes a receiving coil and a magnetic core, wherein the receiving coil is wound around the magnetic core; and the first transmitting coil and the second transmitting coil are partially embedded in the magnetic core.

[0008] In one embodiment, the magnetic core includes a base and a first boss, the first boss is disposed on a surface of the base, and the receiving coil is wound around the first boss.

[0009] In one embodiment, along a direction perpendicular to the base body to the first boss, the compensation coil is higher than the first boss.

[0010] In one embodiment, the first transmitting coil includes a first guide rail and a second guide rail respectively arranged on both sides of the first boss, and both ends of the first guide rail are electrically connected to both ends of the second guide rail to form a closed coil; the first guide rail and the second guide rail are arranged in parallel.

[0011] In one embodiment, the first guide rail includes an opposite first end and a third end, the second guide rail includes an opposite second end and a fourth end, the first end is close to the second end, and the third end is close to the fourth end, and the first transmitting coil further includes:

[0012] A first connecting rail and a second connecting rail are arranged opposite to each other at an interval, the first connecting rail is connected between the first end and the second end, and the second connecting rail is connected between the third end and the fourth end.

[0013] In one embodiment, the second transmitting coil includes a third guide rail and a fourth guide rail respectively arranged on both sides of the first boss, and two ends of the third guide rail are electrically connected to two ends of the fourth guide rail to form a closed coil; the third guide rail and the fourth guide rail are arranged in parallel.

[0014] In one embodiment, the third guide rail includes opposite sixth and seventh ends, the fourth guide rail includes opposite fifth and eighth ends, the fifth end is close to the sixth end, and the seventh end is close to the eighth end, and the second transmitting coil further includes:

[0015] A third connecting rail and a fourth connecting rail are arranged opposite to each other at an interval, the third connecting rail is connected between the fifth end and the sixth end, and the fourth connecting rail is connected between the seventh end and the eighth end.

[0016] In one embodiment, the second connecting track and the fourth connecting track are located in an area surrounded by the compensation coil.

[0017] The segmented cross-zone magnetic coupling mechanism provided in this application has a compensation coil disposed between the first and second transmitting coils spaced apart, i.e., in the segmented cross-zone power supply area. The compensation coil fills the magnetic field trough between the first and second transmitting coils, thereby minimizing the impact of power surges. The segmented cross-zone magnetic coupling mechanism provided in this application can be used for wireless power transmission during dynamic driving of rail transit vehicles. It can effectively alleviate problems such as power pulses, reduced efficiency, and coupling detuning that occur in the segmented cross-zone power supply area, improve the stability and efficiency of the rail transit dynamic wireless power transmission system, and meet the power supply requirements of kilowatt-level high-power rail transit dynamic wireless power transmission systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of a segmented cross-zone magnetic coupling mechanism in one embodiment of the present application.

[0019] Figure 2 It is a structural diagram of a segmented cross-zone magnetic coupling mechanism in another embodiment of the present application.

[0020] Figure 3 It is a cross-sectional schematic diagram of a segmented cross-zone magnetic coupling mechanism in one embodiment of the present application.

[0021] Figure 4 This is a diagram showing the operation effect of the wireless power transmission system in one embodiment of the present application.

[0022] Figure 5 This is a top view of the operating effect of the wireless power transmission system in one embodiment of the present application.

[0023] Description of Figure Numbers:

[0024] Segmented cross-zone magnetic coupling mechanism 10, receiving coil 100, magnetic core 110, base 111, first boss 112, second boss 113, third boss 114, first transmitting coil 120, first guide rail 121, second guide rail 122, first end 123, second end 124, first connecting rail 125, third end 126, fourth end 127, second connecting rail 128, second transmitting coil 130, third guide rail 131, fourth guide rail 132, fifth end 133, sixth end 134, third connecting rail 135, seventh end 136, eighth end 137, fourth connecting rail 138, gap 140, and compensation coil 150. DETAILED DESCRIPTION

[0025] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar modifications without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0027] The serial numbers of the components herein, such as "first", "second", etc., are only used to separate the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application include direct and indirect connections (couplings) unless otherwise specified. In the description of this application, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0028] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0029] See Figure 1An embodiment of the present application provides a segmented cross-zone magnetic coupling mechanism 10. The segmented cross-zone magnetic coupling mechanism 10 includes a first transmitting coil 120, a second transmitting coil 130, and a compensation coil 150. The first transmitting coil 120 and the second transmitting coil 130 are spaced apart. The compensation coil 150 is disposed between the first transmitting coil 120 and the second transmitting coil 130. The first transmitting coil 120 and the second transmitting coil 130 can be long-conductor coils. The first transmitting coil 120 and the second transmitting coil 130 can be mounted on the ground or suspended in the air. The compensation coil 150 can be wound using a D-shaped coil. A gap 140 can be formed between the first transmitting coil 120 and the second transmitting coil 130. High-frequency alternating current can flow through the compensation coil 150 to compensate for the spatial magnetic field lost in the gap 140.

[0030] The segmented cross-zone magnetic coupling mechanism 10 provided in the embodiment of the present application is provided with a compensation coil 150 between the first transmitting coil 120 and the second transmitting coil 130, which are spaced apart, i.e., in the segmented cross-zone power supply area. The compensation coil 150 fills the magnetic field trough between the first transmitting coil 120 and the second transmitting coil 130, thereby minimizing the impact of power surges. The segmented cross-zone magnetic coupling mechanism 10 provided in the embodiment of the present application can be used for wireless power transmission during dynamic driving of rail transit vehicles. It can effectively alleviate problems such as power pulses, reduced efficiency, and coupling detuning that occur during segmented cross-zone power supply areas, improve the stability and efficiency of the rail transit dynamic wireless power transmission system, and meet the power supply requirements of kilowatt-level high-power rail transit dynamic wireless power transmission systems.

[0031] In one embodiment, the first transmitting coil 120 and the second transmitting coil 130 are located near each other's ends within the area enclosed by the compensation coil 150. The magnetic field at the gap 140 is weaker than the magnetic fields of the first transmitting coil 120 and the second transmitting coil 130. The compensation coil 150 is wound around the first transmitting coil 120 and the second transmitting coil 130 in the gap 140 to form a D-shaped coil. The compensation coil 150 fills the magnetic field valley in the gap 140, compensating for coupling coefficient loss, minimizing the impact of power surges, and improving the stability and efficiency of the rail transit dynamic wireless power transmission system.

[0032] See also Figure 2In one embodiment, the segmented cross-zone magnetic coupling mechanism 10 further includes a receiving coil 100 and a magnetic core 110. The receiving coil 100 is wound around the magnetic core 110. The first transmitting coil 120 and the second transmitting coil 130 are partially embedded in the magnetic core 110. The magnetic core 110 can be an E-shaped magnetic core. The magnetic core 110 can be installed on the bottom, top, or side of the tram. The magnetic core 110 and the receiving coil 100 can be located in the middle of the tram's track. The tram travels along the first transmitting coil 120 and the second transmitting coil 130.

[0033] The receiving coil 100 can be formed by winding multiple turns of coil around the magnetic core 110. Appropriate magnetic blocks can be installed in the magnetic core 110 to enhance magnetic field coupling. A drop in the magnetic field between the first transmitting coil 120 and the second transmitting coil 130 will cause a power drop in the receiving coil 100. The compensation coil 150 can fill the magnetic field dip between the first transmitting coil 120 and the second transmitting coil 130, thereby compensating for the power drop in the receiving coil 100.

[0034] In one embodiment, the compensation coil 150 is fed with an alternating current I of the same frequency as the first transmitting coil 120 and the second transmitting coil 130. The amplitude of the alternating current I is determined by calculating the amplitude ΔB of the magnetic field fluctuation between the first transmitting coil 120 and the second transmitting coil 130 based on electromagnetic field calculations. To fill the trough ΔB of the magnetic field fluctuation, the relationship between the amplitude of the alternating current I and the magnetic field fluctuation ΔB is obtained based on Biot-Safar's theorem:

[0035]

[0036] Wherein μ0 is the vacuum magnetic permeability; |rr′| represents the distance between the field point and the origin; l′ represents the closed loop of the first transmitting coil 120 and the second transmitting coil 130; e R Represents the unit vector from the source point to the field point.

[0037] The efficiency calculation of the rail transit dynamic wireless power transmission system includes the influence of the compensation coil 150 on the power of the first transmitting coil 120 and / or the second transmitting coil 130 and the power of the receiving coil 100. The efficiency calculation formula of the rail transit dynamic wireless power transmission system is as follows:

[0038]

[0039] Wherein, P1 is the transmission power of the first transmitting coil 120 and / or the second transmitting coil 130, P1′ is the transmission power of the compensation coil 150, P2 is the power transmitted from the first transmitting coil 120 and / or the second transmitting coil 130 to the receiving coil 100, and P2′ is the power transmitted from the compensation coil 150 to the receiving coil 100.

[0040] See also Figure 3 In one embodiment, the magnetic core 110 includes a base 111 and a first boss 112. The first boss 112 is disposed on a surface of the base 111. The receiving coil 100 is wound around the first boss 112. The receiving coil 100 has multiple turns. The multiple turns of the receiving coil 100 increase the magnetic flux around the first boss 112.

[0041] In one embodiment, the compensation coil 150 is higher than the first boss 112 along a direction perpendicular to the base 111 and the first boss 112. The compensation coil 150 may be located at the lowest level of the gap 140 away from the base 111.

[0042] In one embodiment, the first transmitting coil 120 includes a first guide rail 121 and a second guide rail 122, respectively disposed on either side of the first boss 112. The ends of the first guide rail 121 and the ends of the second guide rail 122 are electrically connected to form a closed coil. The first transmitting coil 120 is a long-conductor coil. The first and second guide rails 121, 122 are arranged in parallel to facilitate the transmission of more magnetic flux.

[0043] In one embodiment, the magnetic core 110 further includes a second boss 113 and a third boss 114 that are spaced apart from each other. The second boss 113 and the third boss 114 are disposed on the surface of the base 111, and the first boss 112 is spaced apart between the second boss 113 and the third boss 114. A first slide is formed between the first boss 112 and the second boss 113. A second slide is formed between the first boss 112 and the third boss 114. The first guide rail 121 is disposed on the first slide. The second guide rail 122 is disposed on the second slide. When the tram is moving, the first guide rail 121 moves along the extension direction of the first slide, and the second guide rail 122 moves along the extension direction of the second slide.

[0044] In one embodiment, the first guide rail 121 includes an opposing first end 123 and a third end 126. The second guide rail 122 includes an opposing second end 124 and a fourth end 127. The first end 123 is proximate to the second end 124. The third end 126 is proximate to the fourth end 127. The first transmitting coil 120 also includes a first connecting rail 125 and a second connecting rail 128 spaced apart and arranged opposite each other. The first connecting rail 125 is connected between the first end 123 and the second end 124. The second connecting rail 128 is connected between the third end 126 and the fourth end 127.

[0045] In a direction perpendicular to the first and second slides, the first connecting rail 125 and the second connecting rail 128 are both higher than the first boss 112. The first connecting rail 125 and the second connecting rail 128 are both higher than the first boss 112, preventing the first boss 112 from blocking the movement of the first guide rail 121 and the second guide rail 122 along the first and second slides, respectively. In a direction perpendicular to the first and second slides, the compensation coil 150 is at the same height as the first connecting rail 125 and the second connecting rail 128. The first connecting rail 125 and the second connecting rail 128 are not at the same height as the first guide rail 121 and the second guide rail 122. The first connecting rail 125 and the second connecting rail 128 protrude away from the first guide rail 121 and the second guide rail 122, so that when the tram is running, the first guide rail 121 and the second guide rail 122 move along the first and second slides, respectively, and the magnetic core 110 follows the movement of the tram.

[0046] In one embodiment, the second transmitting coil 130 includes a third rail 131 and a fourth rail 132, respectively, disposed on either side of the first boss 112. The ends of the third rail 131 and the ends of the fourth rail 132 are electrically connected to form a closed coil. The second transmitting coil 130 is a long-conductor coil. The third rail 131 and the fourth rail 132 are arranged in parallel to facilitate the emission of more magnetic flux. The third rail 131 is disposed on the first slideway, and the fourth rail 132 is disposed on the second slideway. During travel, the third rail 131 extends along the first slideway, and the fourth rail 132 extends along the second slideway.

[0047] In one embodiment, the third guide rail 131 includes opposing sixth and seventh ends 134 and 136. The fourth guide rail 132 includes opposing fifth and eighth ends 133 and 137. The fifth end 133 is proximate to the sixth end 134. The seventh end 136 is proximate to the eighth end 137. The second transmitting coil 130 also includes a third connecting rail 135 and a fourth connecting rail 138 spaced apart and opposed to each other. The third connecting rail 135 is connected between the fifth and sixth ends 133 and 134. The fourth connecting rail 138 is connected between the seventh and eighth ends 136 and 137.

[0048] In a direction perpendicular to the first and second slideways, the third connecting rail 135 and the fourth connecting rail 138 are both higher than the first boss 112. This prevents the first boss 112 from blocking the movement of the third guide rail 131 and the fourth guide rail 132 along the first and second slideways, respectively. In a direction perpendicular to the first and second slideways, the compensation coil 150 is at the same height as the third connecting rail 135 and the fourth connecting rail 138. The third connecting rail 135 and the fourth connecting rail 138 are not at the same height as the third guide rail 131 and the fourth guide rail 132. The third connecting rail 135 and the fourth connecting rail 138 protrude away from the third guide rail 131 and the fourth guide rail 132, respectively, so that when the trolley is in operation, the third guide rail 131 and the fourth guide rail 132 move along the first and second slideways, respectively, and the magnetic core 110 follows the movement of the trolley.

[0049] Along a direction perpendicular to the first slideway and the second slideway, the first connecting rail 125 , the second connecting rail 128 , the third connecting rail 135 , the fourth connecting rail 138 and the compensation coil 150 are at the same height.

[0050] In one embodiment, the second connecting rail 128 and the fourth connecting rail 138 are located within an area enclosed by the compensation coil 150. A D-shaped coil wound around the second connecting rail 128 and the fourth connecting rail 138 constitutes the compensation coil 150. High-frequency alternating current flows through the compensation coil 150 to compensate for the spatial magnetic field lost when the trolley passes through the gap 140.

[0051] See also Figure 4 and Figure 5In one embodiment, multiple magnetic cores 110 can be installed on the bottom of a tram. When the rail transit dynamic wireless power transmission system is in operation, the first guide rail 121 / third guide rail 131 and the second guide rail 122 / fourth guide rail 132 move along the first and second slides, respectively, to propel the tram forward. As the tram moves forward, when the magnetic core 110 passes between the first transmitting coil 120 and the second transmitting coil 130, the magnetic field in the gap 140 becomes weak, causing the power of the receiving coil 100 to drop. At this point, the compensation coil 150 can fill the magnetic field dip in the gap 140, thereby compensating for the dip caused by the power drop of the receiving coil 100. The compensation coil 150 compensates for the loss of coupling coefficient when multiple receiving coils 100 pass through the gap 140 (i.e., the segmented cross-zone power supply area), minimizing the impact of power surges and improving the stability and efficiency of the rail transit dynamic wireless power transmission system.

[0052] The segmented cross-zone magnetic coupling mechanism 10 provided in this embodiment can be applied to rail transit dynamic wireless power transmission systems that meet kilowatt-level high-power power supply requirements. The compensation coil 150 can compensate for power losses caused by the coupling coefficient. The segmented cross-zone magnetic coupling mechanism 10 can compensate for coupling coefficient losses when the receiving coil 100 passes through the gap 140 (i.e., the segmented cross-zone power supply area), reduce power pulses, and improve the efficiency and stability of the rail transit dynamic wireless power transmission system.

[0053] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above-described embodiments merely represent several implementation methods of the present application and should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A segmented cross-zone magnetic coupling mechanism, characterized in that: include: A first transmitting coil (120) and a second transmitting coil (130) arranged at an interval; a compensation coil (150) disposed between the first transmitting coil (120) and the second transmitting coil (130); a gap (140) is formed between the first transmitting coil (120) and the second transmitting coil (130); It also includes a receiving coil (100) and a magnetic core (110), wherein the receiving coil (100) is wound around the magnetic core (110); The first transmitting coil (120) and the second transmitting coil (130) are partially embedded in the magnetic core (110); The magnetic core (110) comprises a base (111) and a first boss (112), the first boss (112) being arranged on a surface of the base (111), and the receiving coil (100) being wound around the first boss (112); Along a direction perpendicular to the base (111) to the first boss (112), the compensation coil (150) is higher than the first boss (112), and the compensation coil (150) is located at the lowest horizontal plane of the gap (140) in a direction away from the base (111); The first transmitting coil (120) comprises a first guide rail (121) and a second guide rail (122) respectively arranged on both sides of the first boss (112); two ends of the first guide rail (121) and two ends of the second guide rail (122) are respectively electrically connected to form a closed coil; the first transmitting coil (120) is a long-conducting coil; the first guide rail (121) and the second guide rail (122) are arranged in parallel; The first guide rail (121) comprises an opposite first end (123) and a third end (126), the second guide rail (122) comprises an opposite second end (124) and a fourth end (127), the first end (123) is close to the second end (124), and the third end (126) is close to the fourth end (127); The first transmitting coil (120) further comprises: a first connecting rail (125) and a second connecting rail (128) which are arranged opposite to each other at an interval, the first connecting rail (125) being connected between the first end (123) and the second end (124), and the second connecting rail (128) being connected between the third end (126) and the fourth end (127); the first connecting rail (125) and the second connecting rail (128) are not at the same height as the first guide rail (121) and the second guide rail (122).

2. The segmented cross-zone magnetic coupling mechanism according to claim 1, characterized in that: The proximal ends of the first transmitting coil (120) and the second transmitting coil (130) that are close to each other are located within the area surrounded by the compensation coil (150).

3. The segmented cross-zone magnetic coupling mechanism according to claim 1, characterized in that: The magnetic core (110) is an E-type magnetic core.

4. The segmented cross-zone magnetic coupling mechanism according to claim 1, characterized in that: The compensation coil (150) is at the same height as the first connecting rail (125) and the second connecting rail (128).

5. The segmented cross-zone magnetic coupling mechanism according to claim 1 or 4, characterized in that: The first connecting rail (125) and the second connecting rail (128) protrude away from the first guide rail (121) and the second guide rail (122).

6. The segmented cross-zone magnetic coupling mechanism according to claim 1, characterized in that: The second transmitting coil (130) comprises a third guide rail (131) and a fourth guide rail (132) respectively arranged on both sides of the first boss (112), and two ends of the third guide rail (131) and two ends of the fourth guide rail (132) are respectively electrically connected to form a closed coil; The third guide rail (131) and the fourth guide rail (132) are arranged in parallel.

7. The segmented cross-zone magnetic coupling mechanism according to claim 6, characterized in that: The third guide rail (131) comprises a sixth end (134) and a seventh end (136) which are opposite to each other, the fourth guide rail (132) comprises a fifth end (133) and an eighth end (137) which are opposite to each other, the fifth end (133) being close to the sixth end (134), the seventh end (136) being close to the eighth end (137), and the second transmitting coil (130) further comprising: A third connecting rail (135) and a fourth connecting rail (138) are arranged opposite to each other at an interval, wherein the third connecting rail (135) is connected between the fifth end (133) and the sixth end (134), and the fourth connecting rail (138) is connected between the seventh end (136) and the eighth end (137).

8. The segmented cross-zone magnetic coupling mechanism according to claim 7, characterized in that: The second connecting track (128) and the fourth connecting track (138) are located in an area surrounded by the compensation coil (150).

9. The segmented cross-zone magnetic coupling mechanism according to claim 7, characterized in that: The third connecting rail (135) and the fourth connecting rail (138) are both higher than the first boss (112).

10. The segmented cross-zone magnetic coupling mechanism according to claim 8, characterized in that: The third connecting rail (135) and the fourth connecting rail (138) protrude away from the third guide rail (131) and the fourth guide rail (132).

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