A vehicle door jacking device and system

Abstract

The application discloses a vehicle door jacking device and system, and relates to the technical field of vehicle doors, which comprises an electromagnetic base and a jacking device. The electromagnetic base is arranged on a vehicle door lock catch reinforcing plate, and the jacking device is arranged on the electromagnetic base. When the vehicle door is closed, the electromagnetic base generates a magnetic force by being electrified, so that the jacking device is in a compressed state. When the vehicle door is opened, the electromagnetic base is de-energized, so that the jacking device is in a released state to open the vehicle door. When the jacking device is in the released state, a pushing force can be generated to open the vehicle door to a half-locked state. When the vehicle door sealing strip is difficult to open the vehicle door to the half-locked state due to a decrease in the compression reaction force caused by a long time, the vehicle door can still be normally opened.

Description

Technical Field

[0001] This invention relates to the field of automotive door technology, and in particular to a door lifting device and system. Background Technology

[0002] Electric doors are opened or closed by an electric door system located inside the cavity between the inner and outer panels of the door. When the door is closed, an opening command is sent to the electric door controller, which then unlocks the door. At this time, the electric door system uses the sealing reaction force of the door seal to apply an outward force to the door, causing it to spring open slightly, thus disengaging the door from the half-locked state. The electric door system then restarts to push the door open.

[0003] However, the door seals will weaken after being compressed for a long time. This can result in the door not being able to be pushed open to a half-locked state due to insufficient reaction force from the seals, thus preventing the door from being opened normally. Summary of the Invention

[0004] This invention provides a door lifting device and system to solve the technical problem in the related art where the reaction force of the existing door sealing strip decreases after long-term compression, making it difficult to push the door open to a half-locked state and preventing the door from being opened normally.

[0005] In a first aspect, a door lifting device is provided, comprising:

[0006] An electromagnetic base is mounted on the door lock reinforcement plate;

[0007] A lifting device, wherein the lifting device is disposed on the electromagnetic base;

[0008] When the car door is closed, the electromagnetic base is energized to generate magnetic force, which compresses the lifter; when the car door is opened, the electromagnetic base is de-energized, which releases the lifter to open the car door.

[0009] In some embodiments, the lifting device includes:

[0010] A lifting housing, which is disposed on the electromagnetic base and can be raised and lowered on the electromagnetic base;

[0011] A spring, wherein the spring is disposed within the lifting housing;

[0012] A metal block is disposed between the spring and the lifting housing. When the electromagnetic base is energized and generates magnetic force, the metal block compresses the spring and causes the lifting housing to descend. When the electromagnetic base is de-energized, the spring resets and causes the lifting housing to rise.

[0013] In some embodiments, the metal block is a magnet or a non-magnetic iron block.

[0014] In some embodiments, the lifting device further includes:

[0015] A rubber gasket is provided on the top of the lifting housing.

[0016] In some embodiments, the electromagnetic base includes:

[0017] The fixing seat is disposed on the door lock buckle reinforcing plate;

[0018] The outer shell is mounted on the fixed base, and the lifting housing is located in the middle of the outer shell. When the lifting housing is lowered, it is located inside the outer shell.

[0019] In some embodiments, the mounting base has a panel inside, and an electromagnet is provided on the panel. The electromagnet is electrically connected to the controller and is used to generate magnetic attraction when energized.

[0020] In some embodiments, the mounting base has multiple bolt holes along the circumferential direction for connecting with the door latch reinforcement plate.

[0021] In some embodiments, the door lifting device further includes:

[0022] A connecting wire, one end of which is connected to the electromagnet, and the other end of which extends to the outside of the electromagnetic base;

[0023] A connector is located at the other end of the connecting line and is connected to the controller.

[0024] In some embodiments, the fixed base, the outer shell, and the lifting shell are all made of aluminum alloy.

[0025] Secondly, a door lifting system is provided, including the aforementioned door lifting device.

[0026] The beneficial effects of the technical solution provided by this invention include:

[0027] This invention provides a car door lifting device and system. The car door lifting device includes an electromagnetic base and a lifting device. The electromagnetic base is disposed on the door latch reinforcement plate, and the lifting device is disposed on the electromagnetic base. When the car door is closed, the electromagnetic base is energized to generate magnetic force, causing the lifting device to be in a compressed state. When the car door is opened, the electromagnetic base is de-energized, causing the lifting device to be in a released state to open the car door. When the lifting device is in the released state, it can generate a thrust to open the car door to a half-locked state. Even when the car door sealing strip is difficult to open to a half-locked state due to the reduced reaction force of compression over a long period of time, the car door can still be opened normally. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the overall structure of a car door lifting device provided in an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of a specific structure of a car door lifting device provided in an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of the electromagnetic base provided in an embodiment of the present invention;

[0032] 1. Electromagnetic base; 11. Mounting base; 111. Panel; 112. Electromagnet; 113. Bolt holes; 12. Outer casing;

[0033] 2. Lifting device; 21. Lifting housing; 22. Spring; 23. Metal block; 24. Rubber pad;

[0034] 3. Connecting cable;

[0035] 4. Connector. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0037] This invention provides a door lifting device and system that can solve the technical problem that the reaction force of the existing door sealing strip decreases after long-term compression, making it difficult to push the door open to a half-locked state and preventing the door from being opened normally.

[0038] Figure 1 The vehicle door lifting device provided in this embodiment of the invention includes: an electromagnetic base 1 and a lifting device 2. The electromagnetic base 1 is disposed on the door latch reinforcement plate, and the lifting device 2 is disposed on the electromagnetic base 1. When the vehicle door is closed, the electromagnetic base 1 is energized to generate magnetic force, causing the lifting device 2 to be in a compressed state. When the vehicle door is opened, the electromagnetic base 1 is de-energized, causing the lifting device 2 to be in a released state to lift the vehicle door.

[0039] The door lifting device provided in this embodiment of the invention includes an electromagnetic base and a lifting device. The electromagnetic base is disposed on the door latch reinforcement plate, and the lifting device is disposed on the electromagnetic base. When the door is closed, the electromagnetic base is energized to generate magnetic force, causing the lifting device to be in a compressed state. When the door is opened, the electromagnetic base is de-energized, causing the lifting device to be in a released state to open the door. When the lifting device is in the compressed state, it fits against the door. When the lifting device is in the released state, it generates a counter-push force to open the door, making the door in a half-locked state. Even when the door sealing strip is difficult to push the door to the half-locked state due to the reduced counter-force caused by long-term compression, the door can still be opened normally.

[0040] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 2 As shown, the lifting device 2 includes: a lifting housing 21, a spring 22, and a metal block 23. The lifting housing 21 is mounted on the electromagnetic base 1 and can move up and down on the electromagnetic base 1. The spring 22 is located inside the lifting housing 21, and the metal block 23 is located between the spring 22 and the lifting housing 21. When the electromagnetic base 1 is energized and generates magnetic force, the metal block 23 compresses the spring 22 and causes the lifting housing 21 to descend. When the electromagnetic base 1 is de-energized, the spring 22 returns to its original position and causes the lifting housing 21 to rise. When the car door is closed... When the electromagnetic base 1 is energized, it generates a magnetic force that attracts the metal block 23 to descend. The metal block 23, attracted by the magnetic force, descends and compresses the spring 22, which in turn causes the lifting housing 21 to descend. When the car door is opened, the electromagnetic force of the electromagnetic base 1 disappears, and the metal block 23 is no longer attracted by external force. The spring 22 resets and causes the metal block 23 and the lifting housing 21 to rise. When the lifting housing 21 rises, it generates a thrust to push the car door to a half-locked state. Even when the door seal strip is difficult to push the car door to a half-locked state due to the reduced reaction force after a long period of compression, the car door can still be opened normally.

[0041] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 2 As shown, the metal block 23 is a magnet or a non-magnetic iron block. When the electromagnetic base 1 is energized and generates magnetic force, it can attract the magnet or the non-magnetic iron block. If the metal block 23 is a magnet, the magnetic poles of the magnet and the magnetic poles of the electromagnetic base 1 must be different to generate an attraction. Using a magnet can increase the magnetic attraction between the electromagnetic base 1 and the metal block 23.

[0042] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 2As shown, the lifting device 2 also includes a rubber pad 24, which is located on the top of the lifting housing 21. The rubber pad 24 is made of a flexible material and has a certain elasticity. It plays a buffering role on the top of the lifting device 2, can absorb some energy, and reduce the vibration and impact of the equipment. When the electromagnetic base 1 is de-energized and the electromagnetic force disappears, the lifting housing 21 can protect the car door when it rises to open the car door, preventing damage to the car door when the lifting housing 21 opens the car door.

[0043] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, the electromagnetic base 1 includes a fixed base 11 and an outer shell 12. The fixed base 11 is disposed on the door latch reinforcement plate, and the outer shell 12 is disposed on the fixed base 11. The lifting housing 21 is provided in the middle of the outer shell 12. When the lifting housing 21 descends, it is located inside the outer shell 12. The fixed base 11 is used to connect with the door latch reinforcement plate. When the door is closed, the electromagnetic base 1 is energized and generates a magnetic force to attract the lifting housing 21 to descend, so that the lifting housing 21 is located inside the outer shell 12 and... The top of the lifting housing 21 is on the same plane as the top of the outer shell 12 and fits against the car door. When the car door is opened, the electromagnetic base 1 loses its electromagnetic force, so the metal block 23 is not attracted by external force. The spring 22 resets and drives the metal block 23 and the lifting housing 21 to rise. The lifting housing 21 then extends to the outside of the outer shell 12 and generates a thrust to push the car door to a half-locked state. Even when the door sealing strip is difficult to push the car door to a half-locked state due to the reduced reaction force after long-term compression, the car door can still be opened normally.

[0044] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 2 and Figure 3 As shown, the mounting base 11 has a panel 111 inside, and an electromagnet 112 is provided on the panel 111. The electromagnet 112 is electrically connected to the controller and is used to generate magnetic attraction when energized. The panel 111 is used to fix the electromagnet 112. The electromagnet 112 uses the magnetic field generated when current passes through the wire to generate magnetic force. When the controller receives a door closing command, the controller controls the electromagnet 112 to be energized to generate magnetic force, so that the lifting device 2, i.e., the lifting housing 21, is always kept in a compressed state. When the controller receives a door opening command, the controller controls the electromagnet 112 to be de-energized and not generate magnetic force, so that the lifting device 2, i.e., the lifting housing 21, is in a released state and generates a counter-push force to push the car door to a half-locked state. Even when the door sealing strip is difficult to push the car door to a half-locked state due to the reduced counter-force caused by long-term compression, the car door can still be opened normally.

[0045] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 2 As shown, the fixing seat 11 has multiple bolt holes 113 along the circumferential direction for connecting with the door latch reinforcement plate. The fixing seat 11 and the door latch reinforcement plate are detachably connected through the multiple bolt holes 113. The fixing seat 11 is fixed to the door latch reinforcement plate by bolts passing through the bolt holes 113 without welding. When the lifter 2 needs maintenance or replacement, it is easy to disassemble and reinstall, thereby reducing maintenance costs. At the same time, since the bolts and nuts are generally made of relatively strong materials and have a simple structure, they can be disassembled and tightened multiple times without being damaged or losing their original tightening ability.

[0046] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, the door lifting device further includes a connecting wire 3 and a connector 4. One end of the connecting wire 3 is connected to the electromagnet 112, and the other end of the connecting wire 3 extends to the outside of the electromagnetic base 1. The connector 4 is located at the other end of the connecting wire 3 and is connected to the controller. The electromagnet 112 is electrically connected to the controller through the connecting wire 3 and the connector 4. The connecting wire 3 has high reliability. The connector 4 achieves electrical connection through the cooperation of a plug and a socket, which is convenient to plug and unplug, easy to connect and disconnect, and can be easily moved and changed in connection position.

[0047] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 1 As shown, the fixed base 11, the outer shell 12, and the lifting shell 21 are all made of aluminum alloy. Aluminum alloy has the advantages of low density and light weight, which can reduce the weight of the car body or door. Aluminum alloy also has high strength, which can withstand greater external forces, improve the stability and safety of the structure, and aluminum alloy is easy to process and form, and can be made into products of various shapes and specifications.

[0048] This invention also provides a car door lifting system, including the aforementioned car door lifting device. The car door lifting device includes an electromagnetic base 1 and a lifter 2. The electromagnetic base 1 is disposed on the car door latch reinforcement plate, and the lifter 2 is disposed on the electromagnetic base 1. When the car door is closed, the electromagnetic base 1 is energized to generate magnetic force, causing the lifter 2 to be in a compressed state. When the car door is opened, the electromagnetic base 1 is de-energized, causing the lifter 2 to be in a released state to open the car door.

[0049] The door lifting system provided in this embodiment of the invention includes an electromagnetic base and a lifter. The electromagnetic base is mounted on the door latch reinforcement plate, and the lifter is mounted on the electromagnetic base. When the door is closed, the electromagnetic base is energized to generate magnetic force, causing the lifter to be in a compressed state. When the door is opened, the electromagnetic base is de-energized, causing the lifter to be in a released state to open the door. When the lifter is in the compressed state, it fits against the door. When the lifter is in the released state, it generates a counter-push force to open the door, making the door half-locked. Even when the door sealing strip becomes difficult to push the door to the half-locked state due to the reduced counter-push force after a long period of compression, the door can still be opened normally.

[0050] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 2 As shown, the lifting device 2 includes: a lifting housing 21, a spring 22, and a metal block 23. The lifting housing 21 is mounted on the electromagnetic base 1 and can move up and down on the electromagnetic base 1. The spring 22 is located inside the lifting housing 21, and the metal block 23 is located between the spring 22 and the lifting housing 21. When the electromagnetic base 1 is energized and generates magnetic force, the metal block 23 compresses the spring 22 and causes the lifting housing 21 to descend. When the electromagnetic base 1 is de-energized, the spring 22 returns to its original position and causes the lifting housing 21 to rise. When the car door is closed... When the electromagnetic base 1 is energized, it generates a magnetic force that attracts the metal block 23 to descend. The metal block 23, attracted by the magnetic force, descends and compresses the spring 22, which in turn causes the lifting housing 21 to descend. When the car door is opened, the electromagnetic force of the electromagnetic base 1 disappears, and the metal block 23 is no longer attracted by external force. The spring 22 resets and causes the metal block 23 and the lifting housing 21 to rise. When the lifting housing 21 rises, it generates a thrust to push the car door to a half-locked state. Even when the door seal strip is difficult to push the car door to a half-locked state due to the reduced reaction force after a long period of compression, the car door can still be opened normally.

[0051] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 2 As shown, the metal block 23 is a magnet or a non-magnetic iron block. When the electromagnetic base 1 is energized and generates magnetic force, it can attract the magnet or the non-magnetic iron block. If the metal block 23 is a magnet, the magnetic poles of the magnet and the magnetic poles of the electromagnetic base 1 must be different to generate an attraction. Using a magnet can increase the magnetic attraction between the electromagnetic base 1 and the metal block 23.

[0052] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 2As shown, the lifting device 2 also includes a rubber pad 24, which is located on the top of the lifting housing 21. The rubber pad 24 is made of a flexible material and has a certain elasticity. It plays a buffering role on the top of the lifting device 2, can absorb some energy, and reduce the vibration and impact of the equipment. When the electromagnetic base 1 is de-energized and the electromagnetic force disappears, the lifting housing 21 can protect the car door when it rises to open the car door, preventing damage to the car door when the lifting housing 21 opens the car door.

[0053] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, the electromagnetic base 1 includes a fixed base 11 and an outer shell 12. The fixed base 11 is disposed on the door latch reinforcement plate, and the outer shell 12 is disposed on the fixed base 11. The lifting housing 21 is provided in the middle of the outer shell 12. When the lifting housing 21 descends, it is located inside the outer shell 12. The fixed base 11 is used to connect with the door latch reinforcement plate. When the door is closed, the electromagnetic base 1 is energized and generates a magnetic force to attract the lifting housing 21 to descend, so that the lifting housing 21 is located inside the outer shell 12 and... The top of the lifting housing 21 is on the same plane as the top of the outer shell 12 and fits against the car door. When the car door is opened, the electromagnetic base 1 loses its electromagnetic force, so the metal block 23 is not attracted by external force. The spring 22 resets and drives the metal block 23 and the lifting housing 21 to rise. The lifting housing 21 then extends to the outside of the outer shell 12 and generates a thrust to push the car door to a half-locked state. Even when the door sealing strip is difficult to push the car door to a half-locked state due to the reduced reaction force after long-term compression, the car door can still be opened normally.

[0054] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 2 and Figure 3 As shown, the mounting base 11 has a panel 111 inside, and an electromagnet 112 is provided on the panel 111. The electromagnet 112 is electrically connected to the controller and is used to generate magnetic attraction when energized. The panel 111 is used to fix the electromagnet 112. The electromagnet 112 uses the magnetic field generated when current passes through the wire to generate magnetic force. When the controller receives a door closing command, the controller controls the electromagnet 112 to be energized to generate magnetic force, so that the lifting device 2, i.e., the lifting housing 21, is always kept in a compressed state. When the controller receives a door opening command, the controller controls the electromagnet 112 to be de-energized and not generate magnetic force, so that the lifting device 2, i.e., the lifting housing 21, is in a released state and generates a counter-push force to push the car door to a half-locked state. Even when the door sealing strip is difficult to push the car door to a half-locked state due to the reduced counter-force caused by long-term compression, the car door can still be opened normally.

[0055] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 2 As shown, the fixing seat 11 has multiple bolt holes 113 along the circumferential direction for connecting with the door latch reinforcement plate. The fixing seat 11 and the door latch reinforcement plate are detachably connected through the multiple bolt holes 113. The fixing seat 11 is fixed to the door latch reinforcement plate by bolts passing through the bolt holes 113 without welding. When the lifter 2 needs maintenance or replacement, it is easy to disassemble and reinstall, thereby reducing maintenance costs. At the same time, since the bolts and nuts are generally made of relatively strong materials and have a simple structure, they can be disassembled and tightened multiple times without being damaged or losing their original tightening ability.

[0056] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, the door lifting device further includes a connecting wire 3 and a connector 4. One end of the connecting wire 3 is connected to the electromagnet 112, and the other end of the connecting wire 3 extends to the outside of the electromagnetic base 1. The connector 4 is located at the other end of the connecting wire 3 and is connected to the controller. The electromagnet 112 is electrically connected to the controller through the connecting wire 3 and the connector 4. The connecting wire 3 has high reliability. The connector 4 achieves electrical connection through the cooperation of a plug and a socket, which is convenient to plug and unplug, easy to connect and disconnect, and can be easily moved and changed in connection position.

[0057] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 1 As shown, the fixed base 11, the outer shell 12, and the lifting shell 21 are all made of aluminum alloy. Aluminum alloy has the advantages of low density and light weight, which can reduce the weight of the car body or door. Aluminum alloy also has high strength, which can withstand greater external forces, improve the stability and safety of the structure, and aluminum alloy is easy to process and form, and can be made into products of various shapes and specifications.

[0058] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0059] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0060] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention herein.

Claims

1. A door lifting device, characterized in that, include: Electromagnetic base (1), wherein the electromagnetic base (1) is disposed on the door lock buckle reinforcement plate; Lifter (2), the lifter (2) is mounted on the electromagnetic base (1); When the car door is closed, the electromagnetic base (1) is energized to generate magnetic force, causing the lifter (2) to be in a compressed state; when the car door is opened, the electromagnetic base (1) is de-energized, causing the lifter (2) to be in a released state to open the car door. The lifting device (2) includes: A lifting housing (21) is provided on the electromagnetic base (1) and can be lifted and lowered on the electromagnetic base (1); Spring (22), the spring (22) is disposed inside the lifting housing (21); Metal block (23) is located between spring (22) and lifting housing (21). When the electromagnetic base (1) is energized and generates magnetic force, the metal block (23) compresses the spring (22) and drives the lifting housing (21) to descend. When the electromagnetic base (1) is de-energized, the spring (22) resets and drives the lifting housing (21) to rise. The lifting device (2) also includes: A rubber pad (24) is provided on the top of the lifting housing (21); The electromagnetic base (1) includes: Fixing seat (11), the fixing seat (11) is provided on the door lock buckle reinforcement plate; The outer shell (12) is located on the fixed base (11). The middle part of the outer shell (12) is provided with the lifting housing (21), which is located inside the outer shell (12) when the lifting housing (21) is lowered.

2. The door lifting device according to claim 1, characterized in that: The metal block (23) is a magnet or a non-magnetic iron block.

3. The door lifting device according to claim 1, characterized in that, The fixed base (11) is provided with a panel (111), and an electromagnet (112) is provided on the panel (111). The electromagnet (112) is electrically connected to the controller and is used to generate magnetic attraction when energized.

4. The door lifting device according to claim 3, characterized in that: The mounting base (11) has multiple bolt holes (113) along the circumferential direction for connecting with the door lock buckle reinforcement plate.

5. The door lifting device according to claim 3, characterized in that, Also includes: A connecting line (3) is provided, one end of which is connected to the electromagnet (112), and the other end of which extends to the outside of the electromagnetic base (1). A connector (4) is located at the other end of the connecting line (3) and connected to the controller.

6. The door lifting device according to claim 1, characterized in that: The fixed base (11), the outer shell (12), and the lifting shell (21) are all made of aluminum alloy.

7. A door lifting system, characterized in that, Includes the door lifting device as described in any one of claims 1-6.

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