Vehicle door jacking device and system

Abstract

The invention discloses a car door jacking device and system, and relates to the technical field of car doors, the car door jacking device comprises an electromagnetic base and a jacking device, the electromagnetic base is arranged on a car door lock catch reinforcing plate, the jacking device is arranged on the electromagnetic base, and when a car door is closed, the jacking device is arranged on the electromagnetic base. When the automobile door is opened, the electromagnetic base is powered on to generate magnetic force so that the jacking device can be in a compressed state, when the automobile door is opened, the electromagnetic base is powered off so that the jacking device can be in a released state to jack the automobile door, and when the jacking device is in the released state, thrust can be generated to jack the automobile door to be in a semi-locked state. And when the vehicle door sealing strip is difficult to push the vehicle door open to a semi-locked state due to long-time compression counterforce reduction, the vehicle door can still be normally opened.

Description

Technical Field

[0001] The invention relates to the technical field of automobile doors, and in particular to a door lifting device and system. Background Art

[0002] The electric door is opened or closed by pushing the door through the electric door system installed in the cavity between the inner and outer panels of the door. When the door is in the closed state, the opening command is input to the electric door controller, and the electric door controller controls the door lock to unlock. At this time, the electric door system uses the sealing reaction force of the door sealing strip to apply an outward force to the door to bounce the door open at a small angle, so that the door is out of the semi-locked state, and the electric door system starts again to push the door open.

[0003] However, the door sealing strip will decay after being compressed for a long time. There may be a situation where the reaction force of the sealing strip is too small to push the door open to a semi-locked state, causing the door to be unable to open normally. Summary of the invention

[0004] The embodiment of the present invention provides a vehicle door lifting device and system to solve the technical problem in the related art that the reaction force of the existing vehicle door sealing strip will decrease after long-term compression, making it difficult to push the vehicle door to a semi-locked state, making it impossible to open the vehicle door normally.

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

[0006] An electromagnetic base, wherein the electromagnetic base is arranged on the door lock reinforcement plate;

[0007] A jacking device, wherein the jacking device is arranged on the electromagnetic base;

[0008] When the door is closed, the electromagnetic base is powered on to generate magnetic force to put the lifter in a compressed state; when the door is opened, the electromagnetic base is powered off to put the lifter in a released state to push open the door.

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

[0010] A lifting shell, the lifting shell is arranged on the electromagnetic base and can be lifted and lowered on the electromagnetic base;

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

[0012] A metal block is arranged between the spring and the lifting shell. When the electromagnetic base is powered on to generate magnetic force, the metal block compresses the spring and drives the lifting shell to descend. When the electromagnetic base is powered off, the spring is reset to drive the lifting shell to ascend.

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

[0014] In some embodiments, the jacking device further comprises:

[0015] A rubber gasket is arranged on the top of the lifting shell.

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

[0017] A fixing seat, the fixing seat being arranged on the door lock reinforcement plate;

[0018] The outer shell is arranged on the fixing seat, and the lifting shell is arranged in the middle of the outer shell. When the lifting shell descends, it is located inside the outer shell.

[0019] In some embodiments, a panel is provided in the fixing seat, an electromagnet is provided on the panel, and the electromagnet is electrically connected to a controller for generating magnetic attraction when energized.

[0020] In some embodiments, the fixing seat is provided with a plurality of bolt holes along a circumferential direction for connecting with the door lock 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 plug connector is arranged at the other end of the connecting line and connected to the controller.

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

[0025] In a second aspect, a vehicle door lifting system is provided, comprising the aforementioned vehicle door lifting device.

[0026] The beneficial effects brought about by the technical solution provided by the present invention include:

[0027] An embodiment of the present invention provides a door lifting device and system, wherein the door lifting device comprises an electromagnetic base and a lifter, wherein the electromagnetic base is arranged on a door lock reinforcement plate, and the lifter is arranged on the electromagnetic base. When the door is closed, the electromagnetic base is powered on to generate magnetic force to put the lifter in a compressed state, and when the door is opened, the electromagnetic base is powered off to put the lifter in a released state to lift the door. When the lifter is in the released state, it can generate thrust to push the door open to a semi-locked state, and when the door sealing strip is difficult to push the door to a semi-locked state due to reduced reaction force due to long-term compression, the door can still be opened normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A schematic diagram of the overall structure of a door lifting device provided by an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of the specific structure of a door lifting device provided by an embodiment of the present invention;

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

[0032] 1. Electromagnetic base; 11. Fixing base; 111. Panel; 112. Electromagnet; 113. Bolt hole; 12. Outer shell;

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

[0034] 3. Connecting wire;

[0035] 4. Plug connector. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The embodiment of the present invention provides a vehicle door lifting device and system, which can solve the technical problem that the reaction force of the existing vehicle door sealing strip will decrease after long-term compression, making it difficult to push the vehicle door to a semi-locked state, making the vehicle door unable to be opened normally.

[0038] Figure 1 The invention discloses a door lifting device, comprising an electromagnetic base 1 and a lifter 2. The electromagnetic base 1 is arranged on a door latch reinforcement plate, and the lifter 2 is arranged on the electromagnetic base 1. When the door is closed, the electromagnetic base 1 is powered on to generate magnetic force to put the lifter 2 in a compressed state. When the door is opened, the electromagnetic base 1 is powered off to put the lifter 2 in a released state to open the door.

[0039] The door lifting device provided in the embodiment of the present invention is provided with an electromagnetic base and a lifter, wherein the electromagnetic base is arranged on a door lock reinforcement plate, and the lifter is arranged on the electromagnetic base. When the door is closed, the electromagnetic base is powered on to generate magnetic force to put the lifter in a compressed state. When the door is opened, the electromagnetic base is powered off to put the lifter in a released state to lift the door. When the lifter is in a compressed state, it fits the door. When the lifter is in a released state, it generates a reverse thrust to push the door open, so that the door is in a semi-locked state. When the door sealing strip is compressed for a long time and the reverse force is reduced and it is difficult to push the door to the semi-locked state, the door can still be opened normally.

[0040] As an optional implementation, in an embodiment of the invention, see Figure 2 As shown, the lifter 2 includes: a lifting shell 21, a spring 22 and a metal block 23. The lifting shell 21 is arranged on the electromagnetic base 1 and can be lifted and lowered on the electromagnetic base 1. The spring 22 is arranged in the lifting shell 21. The metal block 23 is arranged between the spring 22 and the lifting shell 21. When the electromagnetic base 1 is powered on to generate magnetic force, the metal block 23 compresses the spring 22 and drives the lifting shell 21 to descend. When the electromagnetic base 1 is powered off, the spring 22 is reset to drive the lifting shell 21 to rise. When the car door is closed, , the electromagnetic base 1 is energized and generates magnetic force to attract the metal block 23 to descend. The metal block 23 is attracted by the magnetic force and descends to compress the spring 22 and drive the lifting shell 21 to descend; when the car door is opened, the electromagnetic base 1 is turned off and the electromagnetic force disappears, then the metal block 23 has no external force to attract, the spring 22 is reset to drive the metal block 23 and the lifting shell 21 to rise, and the lifting shell 21 generates thrust to push the door open to a semi-locked state when it rises. When the door sealing strip is compressed for a long time and the reaction force is reduced and it is difficult to push the door to a semi-locked state, the door can still be opened normally.

[0041] As an optional implementation, in an embodiment of the invention, see Figure 2 As shown, the metal block 23 is a magnet or a non-magnetic iron block. When the electromagnetic base 1 is energized to generate 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 must be different from the magnetic poles of the electromagnetic base 1 to generate an attractive force. The use of a magnet can increase the magnetic attraction between the electromagnetic base 1 and the metal block 23.

[0042] As an optional implementation, in an embodiment of the invention, see Figure 2As shown, the lifter 2 also includes: a rubber gasket 24, which is arranged on the top of the lifting shell 21. The rubber gasket 24 is made of a flexible material and has a certain elasticity. It plays a buffering role on the top of the lifter 2, can absorb part of the energy, and reduce the vibration and impact of the equipment. When the electromagnetic base 1 is turned off and the electromagnetic force disappears, the lifting shell 21 rises to lift the door to protect the door, preventing the lifting shell 21 from damaging the door when it lifts the door.

[0043] As an optional implementation, in an embodiment of the invention, see 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 arranged on the vehicle door lock reinforcement plate, the outer shell 12 is arranged on the fixed base 11, and the lifting shell 21 is arranged in the middle of the outer shell 12. When the lifting shell 21 descends, it is located inside the outer shell 12. The fixed base 11 is used to connect with the vehicle door lock reinforcement plate. When the vehicle door is closed, the electromagnetic base 1 is energized and generates magnetic force to attract the lifting shell 21 to descend, then the lifting shell 21 is located inside the outer shell 12 and The lifting shell 21 has the same height as the outer shell 12, and the top of the lifting shell 21 is in a plane with the top of the outer shell 12 and fits the door; when the door is opened, the electromagnetic force of the electromagnetic base 1 disappears, and the metal block 23 has no external force to attract. The spring 22 resets to drive the metal block 23 and the lifting shell 21 to rise, and the lifting shell 21 extends to the outside of the outer shell 12 and generates thrust to push the door to a semi-locked state. When the door sealing strip is difficult to push the door to a semi-locked state due to the reduced reaction force of the long-term compression, the door can still be opened normally.

[0044] As an optional implementation, in an embodiment of the invention, see Figure 2 and Figure 3 As shown, a panel 111 is provided in the fixing seat 11, 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 powered on. The panel 111 is used to fix the electromagnet 112. The electromagnet 112 generates magnetic force by using the magnetic field generated when current passes through the wire. When the controller receives a door closing command, the controller controls the electromagnet 112 to be powered on to generate magnetic force, so that the lifter 2, i.e., the lifting shell 21, is always kept in a compressed state; when the controller receives a door opening command, the controller controls the electromagnet 112 to be powered off and not to generate magnetic force, so that the lifter 2, i.e., the lifting shell 21, is in a released state to generate a reverse thrust to push the door to a semi-locked state. When the door sealing strip is difficult to push the door to a semi-locked state due to the reduced reverse force due to long-term compression, the door can still be opened normally.

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

[0046] As an optional implementation, in an embodiment of the invention, see Figure 1 and Figure 2 As shown, the door lifting device also includes: a connecting wire 3 and a plug 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 plug connector 4 is arranged 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 plug connector 4, the connecting wire 3 has high reliability, the plug connector 4 realizes electrical connection through the cooperation of a plug and a socket, is easy to plug and unplug, easy to connect and disconnect, and can be easily moved and the connection position can be changed.

[0047] As an optional implementation, in an embodiment of the invention, see Figure 1 As shown, the fixing seat 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 vehicle body or the door. Aluminum alloy also has high strength and can withstand large external forces, thereby improving the stability and safety of the structure. Aluminum alloy is easy to process and shape, and can be made into products of various shapes and specifications.

[0048] An embodiment of the present invention further provides a door lifting system, including the aforementioned door lifting device, wherein the door lifting device includes an electromagnetic base 1 and a lifter 2, wherein the electromagnetic base 1 is arranged on a door lock reinforcement plate, and the lifter 2 is arranged on the electromagnetic base 1. When the door is closed, the electromagnetic base 1 is powered on to generate magnetic force to put the lifter 2 in a compressed state. When the door is opened, the electromagnetic base 1 is powered off to put the lifter 2 in a released state to open the door.

[0049] The door lifting system provided by the embodiment of the present invention has a door lifting device provided with an electromagnetic base and a lifter, wherein the electromagnetic base is arranged on a door lock reinforcement plate, and the lifter is arranged on the electromagnetic base. When the door is closed, the electromagnetic base is powered on to generate magnetic force to put the lifter in a compressed state. When the door is opened, the electromagnetic base is powered off to put the lifter in a released state to lift the door. When the lifter is in a compressed state, it fits the door. When the lifter is in a released state, it generates a reverse thrust to push the door open, so that the door is in a semi-locked state. When the door sealing strip is compressed for a long time and the reverse force is reduced, the door can still be opened normally.

[0050] As an optional implementation, in an embodiment of the invention, see Figure 2 As shown, the lifter 2 includes: a lifting shell 21, a spring 22 and a metal block 23. The lifting shell 21 is arranged on the electromagnetic base 1 and can be lifted and lowered on the electromagnetic base 1. The spring 22 is arranged in the lifting shell 21. The metal block 23 is arranged between the spring 22 and the lifting shell 21. When the electromagnetic base 1 is powered on to generate magnetic force, the metal block 23 compresses the spring 22 and drives the lifting shell 21 to descend. When the electromagnetic base 1 is powered off, the spring 22 is reset to drive the lifting shell 21 to rise. When the car door is closed, , the electromagnetic base 1 is energized and generates magnetic force to attract the metal block 23 to descend. The metal block 23 is attracted by the magnetic force and descends to compress the spring 22 and drive the lifting shell 21 to descend; when the car door is opened, the electromagnetic base 1 is turned off and the electromagnetic force disappears, then the metal block 23 has no external force to attract, the spring 22 is reset to drive the metal block 23 and the lifting shell 21 to rise, and the lifting shell 21 generates thrust to push the door open to a semi-locked state when it rises. When the door sealing strip is compressed for a long time and the reaction force is reduced and it is difficult to push the door to a semi-locked state, the door can still be opened normally.

[0051] As an optional implementation, in an embodiment of the invention, see Figure 2 As shown, the metal block 23 is a magnet or a non-magnetic iron block. When the electromagnetic base 1 is energized to generate 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 must be different from the magnetic poles of the electromagnetic base 1 to generate an attractive force. The use of a magnet can increase the magnetic attraction between the electromagnetic base 1 and the metal block 23.

[0052] As an optional implementation, in an embodiment of the invention, see Figure 2As shown, the lifter 2 also includes: a rubber gasket 24, which is arranged on the top of the lifting shell 21. The rubber gasket 24 is made of a flexible material and has a certain elasticity. It plays a buffering role on the top of the lifter 2, can absorb part of the energy, and reduce the vibration and impact of the equipment. When the electromagnetic base 1 is turned off and the electromagnetic force disappears, the lifting shell 21 rises to lift the door to protect the door, preventing the lifting shell 21 from damaging the door when it lifts the door.

[0053] As an optional implementation, in an embodiment of the invention, see 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 arranged on the vehicle door lock reinforcement plate, the outer shell 12 is arranged on the fixed base 11, and the lifting shell 21 is arranged in the middle of the outer shell 12. When the lifting shell 21 descends, it is located inside the outer shell 12. The fixed base 11 is used to connect with the vehicle door lock reinforcement plate. When the vehicle door is closed, the electromagnetic base 1 is energized and generates magnetic force to attract the lifting shell 21 to descend, then the lifting shell 21 is located inside the outer shell 12 and The lifting shell 21 has the same height as the outer shell 12, and the top of the lifting shell 21 is in a plane with the top of the outer shell 12 and fits the door; when the door is opened, the electromagnetic force of the electromagnetic base 1 disappears, and the metal block 23 has no external force to attract. The spring 22 resets to drive the metal block 23 and the lifting shell 21 to rise, and the lifting shell 21 extends to the outside of the outer shell 12 and generates thrust to push the door to a semi-locked state. When the door sealing strip is difficult to push the door to a semi-locked state due to the reduced reaction force of the long-term compression, the door can still be opened normally.

[0054] As an optional implementation, in an embodiment of the invention, see Figure 2 and Figure 3 As shown, a panel 111 is provided in the fixing seat 11, 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 powered on. The panel 111 is used to fix the electromagnet 112. The electromagnet 112 generates magnetic force by using the magnetic field generated when current passes through the wire. When the controller receives a door closing command, the controller controls the electromagnet 112 to be powered on to generate magnetic force, so that the lifter 2, i.e., the lifting shell 21, is always kept in a compressed state; when the controller receives a door opening command, the controller controls the electromagnet 112 to be powered off and not to generate magnetic force, so that the lifter 2, i.e., the lifting shell 21, is in a released state to generate a reverse thrust to push the door to a semi-locked state. When the door sealing strip is difficult to push the door to a semi-locked state due to the reduced reverse force due to long-term compression, the door can still be opened normally.

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

[0056] As an optional implementation, in an embodiment of the invention, see Figure 1 and Figure 2 As shown, the door lifting device also includes: a connecting wire 3 and a plug 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 plug connector 4 is arranged 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 plug connector 4, the connecting wire 3 has high reliability, the plug connector 4 realizes electrical connection through the cooperation of a plug and a socket, is easy to plug and unplug, easy to connect and disconnect, and can be easily moved and the connection position can be changed.

[0057] As an optional implementation, in an embodiment of the invention, see Figure 1 As shown, the fixing seat 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 vehicle body or the door. Aluminum alloy also has high strength and can withstand large external forces, thereby improving the stability and safety of the structure. Aluminum alloy is easy to process and shape, and can be made into products of various shapes and specifications.

[0058] In the description of the present invention, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0059] It should be noted that, in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0060] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be 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 present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features of the present invention.

Claims

1. A door lifting device, characterized in that: include: An electromagnetic base (1), wherein the electromagnetic base (1) is arranged on a vehicle door latch reinforcement plate; A lifter (2), wherein the lifter (2) is arranged on the electromagnetic base (1); When the vehicle door is closed, the electromagnetic base (1) is energized to generate magnetic force to put the lifter (2) in a compressed state; When the vehicle door is opened, the electromagnetic base (1) is powered off so that the lifter (2) is in a released state to lift the door open.

2. The door lifting device according to claim 1, characterized in that: The jacking device (2) comprises: A lifting shell (21), the lifting shell (21) is arranged on the electromagnetic base (1) and can be lifted and lowered on the electromagnetic base (1); A spring (22), wherein the spring (22) is arranged in the lifting housing (21); A metal block (23), wherein the metal block (23) is arranged between the spring (22) and the lifting shell (21); when the electromagnetic base (1) is powered on to generate magnetic force, the metal block (23) compresses the spring (22) and drives the lifting shell (21) to descend; when the electromagnetic base (1) is powered off, the spring (22) is reset to drive the lifting shell (21) to ascend.

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

4. The door lifting device according to claim 2, characterized in that: The jacking device (2) further comprises: A rubber gasket (24), wherein the rubber gasket (24) is arranged on the top of the lifting shell (21).

5. The door lifting device according to claim 2, characterized in that: The electromagnetic base (1) comprises: A fixing seat (11), the fixing seat (11) being arranged on the vehicle door latch reinforcement plate; An outer shell (12), the outer shell (12) being arranged on the fixing seat (11), the lifting shell (21) being arranged in the middle of the outer shell (12), and being located inside the outer shell (12) when the lifting shell (21) descends.

6. The door lifting device according to claim 5, characterized in that: A panel (111) is provided inside the fixing seat (11), and an electromagnet (112) is provided on the panel (111). The electromagnet (112) is electrically connected to a controller and is used to generate magnetic attraction when energized.

7. The door lifting device according to claim 6, characterized in that: The fixing seat (11) is provided with a plurality of bolt holes (113) along the circumferential direction, which are used to be connected with the vehicle door lock reinforcement plate.

8. The door lifting device according to claim 6, characterized in that: Also includes: A connecting wire (3), one end of the connecting wire (3) being connected to the electromagnet (112), and the other end of the connecting wire (3) extending to the outside of the electromagnetic base (1); A plug connector (4), the plug connector (4) being arranged at the other end of the connecting line (3) and connected to the controller.

9. The door lifting device according to claim 5, characterized in that: The fixing seat (11), the outer shell (12), and the lifting shell (21) are all made of aluminum alloy.

10. A door lifting system, characterized in that: The invention comprises the vehicle door lifting device according to any one of claims 1 to 9.

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