Door body assembly and working machine

Abstract

The utility model relates to the field of operation machinery, and discloses a door body assembly and operation machinery. The door body assembly comprises a door body used for being rotationally connected with a vehicle frame; the first connecting piece and the second connecting piece are connected in a sliding or rotating mode, one of the first connecting piece and the second connecting piece is connected with the door body, and the other one of the first connecting piece and the second connecting piece is used for being connected with a frame; and the magnetism generating device is connected with the first connecting piece, and the magnetism generating device is used for enabling the first connecting piece to generate a magnetic field to attract the second connecting piece in an electrified state. According to the door body assembly provided by the utility model, the door body can be adjusted to any opening position, then the first connecting piece generates the magnetic field to attract the second connecting piece through the magnetism generating device, and sliding or rotation between the first connecting piece and the second connecting piece is limited, so that the door body can be limited, and stepless adjustment of the opening position of the door body is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of operating machinery, in particular to a door body assembly and an operating machinery. Background Art

[0002] A side door is usually provided on the side of the machine body, so that an operator or maintenance personnel can open the side door to access the parts that need maintenance or overhaul without moving the whole machine.

[0003] In order to prevent the side door from closing automatically during maintenance or overhaul, the side door is usually limited by a wind hook. However, the wind hook cannot adjust the opening position of the side door. For example, if there is an obstacle on the opening path of the side door, making it impossible for the side door to open to the opening position of the wind hook, the side door cannot be connected to the wind hook, resulting in the side door being unable to be limited. Utility Model Content

[0004] In view of this, the utility model provides a door assembly and an operating machine to solve or improve the problem in the related art that the wind hook can only limit the side door to a fixed position and cannot adjust the opening position of the side door.

[0005] In a first aspect, the utility model provides a door assembly for installation on a vehicle frame, comprising:

[0006] A door body, used for rotationally connecting with the frame;

[0007] A first connecting member and a second connecting member, which are slidably connected or rotatably connected, one of the first connecting member and the second connecting member is connected to the door body, and the other is used to be connected to the vehicle frame;

[0008] The magnetizing device is connected to the first connecting member, and is used for causing the first connecting member to generate a magnetic field to attract the second connecting member when powered on.

[0009] In an optional embodiment, the door assembly further includes a switch, which connects the magnetizing device and a power source and is used to control the on / off connection between the magnetizing device and the power source.

[0010] In an optional embodiment, a door lock is provided on the door body, and the door lock is used to lock the door body to the vehicle frame. The switch is linked to the door lock, and when the door lock is locked, the switch is closed, and when the door lock is unlocked, the switch is disconnected.

[0011] In an alternative embodiment, the switch is a normally closed switch. The moving contact of the switch is in electrical contact with the stationary contact under the action of an elastic member. The moving contact is linked with the door lock. In the state where the door lock is locked, the moving contact contacts the stationary contact, and in the state where the door lock is unlocked, the moving contact disengages from the stationary contact.

[0012] In an alternative embodiment, the magnet generating device includes an electromagnetic coil and an iron core. The electromagnetic coil is wound around the outside of the iron core, and the iron core is connected to the first connecting member.

[0013] Alternatively, the magnet generating device includes an electromagnetic coil, and the electromagnetic coil is wound around the outside of the first connecting member.

[0014] In an alternative embodiment, one of the first connecting member and the second connecting member includes a connecting rod, and the other includes a connecting seat.

[0015] Wherein, the connecting rod is rotatably connected to one of the door body and the vehicle frame, the connecting seat is connected to the other of the door body and the vehicle frame, a through hole for the connecting rod to pass through and slide is provided on the connecting seat, and the magnet generating device is connected to the connecting rod or the connecting seat.

[0016] In an alternative embodiment, the connecting rod includes a first rod section, a second rod section and a third rod section connected in sequence. Both the first rod section and the third rod section are arranged at an angle to the second rod section.

[0017] Wherein, the second rod section is slidably connected to the through hole.

[0018] The third rod section is rotatably connected to the door body or the vehicle frame.

[0019] The first rod section is used to limit the connecting seat.

[0020] In an alternative embodiment, an installation hole for rotatably connecting with the connecting rod is provided on the door body or the vehicle frame. The through hole is a waist-shaped hole, and the length direction of the waist-shaped hole is arranged along the axial direction of the installation hole, and the length of the third rod section extending into the installation hole is less than or equal to the length of the waist-shaped hole.

[0021] In an alternative embodiment, one of the first connecting member and the second connecting member includes a rotating shaft, and the other includes a shaft sleeve.

[0022] Wherein, the rotating shaft is connected to one of the door body and the vehicle frame, the shaft sleeve is connected to the other of the door body and the vehicle frame, the rotating shaft is rotatably connected to the shaft sleeve, and both the rotating shaft and the shaft sleeve are coaxial with the rotation axis of the door body. The magnetic generating device is connected to the rotating shaft or the shaft sleeve.

[0023] In a second aspect, the present utility model further provides a working machine, including a vehicle frame and the door body assembly as described above, and the door body is rotatably connected to the vehicle frame.

[0024] The door body assembly provided by the present utility model can adjust the door body to any open position, and then the magnetic generating device makes the first connecting member generate a magnetic field to attract the second connecting member, restricting the sliding or rotation between the first connecting member and the second connecting member, so as to limit the door body, thereby realizing the adjustment of the open position of the door body.

[0025] Since the working machine provided by the present utility model includes the door body assembly provided by the present utility model, it simultaneously includes all the above advantages of the door body assembly. Description of the Drawings

[0026] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a schematic structural diagram of a door body assembly according to an embodiment of the present utility model;

[0028] Figure 2 For Figure 1 The partial enlarged view at position I in the view shown;

[0029] Figure 3 It is a schematic principle diagram of the magnetic generating device according to an embodiment of the present utility model being connected to a power source through a switch.

[0030] Explanation of the Reference Numerals in the Drawings:

[0031] 1. Door body; 101. Door lock; 1011. Lock tongue; 2. Vehicle frame; 3. First connecting member; 4. Second connecting member; 5. Magnetic generating device; 6. Switch; 7. Power source; 8. Connecting rod; 801. First rod segment; 802. Second rod segment; 803. Third rod segment; 9. Connecting seat; 901. Through hole; 10. Rotating shaft; 11. Shaft sleeve. Detailed Embodiments

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0033] In the related art, the wind hook can only limit the side door to a fixed position and cannot adjust the opening position of the side door. For example, when there are obstacles in the opening path of the side door, such as obstacles including but not limited to maintenance equipment, inspection equipment, and other operating machinery, making the side door unable to open to the opening position of the wind hook, the side door cannot be connected to the wind hook, resulting in the side door unable to be limited.

[0034] To solve or improve the problem that in the related art, the wind hook can only limit the side door to a fixed position and cannot adjust the opening position of the side door, an embodiment of the present utility model provides a door body assembly and an operating machinery.

[0035] The following will describe in conjunction with Figures 1 to 3 the door body assembly provided in the embodiments of the present utility model.

[0036] Specifically, the door body assembly includes a door body 1, a first connecting member 3, a second connecting member 4, and a magnetic generating device 5.

[0037] Among them, the door body 1 is used to be rotatably connected to the vehicle frame 2. Specifically, a door frame is provided on the vehicle frame 2, and the door body 1 is rotatably connected to the door frame on the vehicle frame 2.

[0038] The first connecting member 3 and the second connecting member 4 are rotatably connected or slidably connected. One of the first connecting member 3 and the second connecting member 4 is connected to the door body 1, and the other is used to be connected to the vehicle frame 2. During the rotation of the door body 1 relative to the vehicle frame 2, the first connecting member 3 and the second connecting member 4 rotate or slide relative to each other.

[0039] The magnetic generating device 5 is connected to the first connecting member 3. The magnetic generating device 5 is used to generate a magnetic field to attract the second connecting member 4 when energized. Correspondingly, when the magnetic generating device 5 is de-energized, the first connecting member 3 demagnetizes. It can be understood that both the first connecting member 3 and the second connecting member 4 are made of magnetic materials. For example, the magnetic materials include but are not limited to iron and steel.

[0040] In this embodiment, during use, when adjusting the opening position of the door body 1, the first connecting member 3 and the second connecting member 4 slide or rotate relative to each other. When the door body 1 is adjusted to a suitable opening position, the magnetic generating device 5 is powered on. The magnetic generating device 5 causes the first connecting member 3 to generate a magnetic field to attract the second connecting member 4, thereby restricting the rotation or sliding between the first connecting member 3 and the second connecting member 4, and further keeping the door body 1 in the current position.

[0041] With such a setting, the door body assembly in the embodiment of the present utility model can adjust the door body 1 to any opening position, and then the magnetic generating device 5 causes the first connecting member 3 to generate a magnetic field to attract the second connecting member 4, restricting the sliding or rotation between the first connecting member 3 and the second connecting member 4, so as to limit the door body 1, thereby realizing stepless adjustment of the opening position of the door body 1.

[0042] In some embodiments provided by the present utility model, the magnetic generating device 5 includes an electromagnetic coil and an iron core. The electromagnetic coil is wound around the outside of the iron core, and the iron core is connected to the first connecting member 3. For example, the iron core can be connected to the first connecting member 3 by means of bonding, welding or connecting with a connecting member. In the state where the electromagnetic coil is powered on, the electromagnetic coil generates a magnetic field to magnetize the iron core, and the iron core is used to enhance the magnetic field generated by the electromagnetic coil. Since the iron core is connected to the first connecting member 3, the iron core can magnetize the first connecting member 3, and the magnetic field generated by the first connecting member 3 can attract the second connecting member 4, thereby restricting the rotation or sliding between the first connecting member 3 and the second connecting member 4. After the electromagnetic coil is powered off, the iron core demagnetizes, so that the first connecting member 3 demagnetizes, and further the first connecting member 3 and the second connecting member 4 can slide or rotate relative to each other.

[0043] Certainly, the magnetic generating device 5 is not limited to the above form of the electromagnetic coil and the iron core. For example, in other embodiments provided by the present utility model, the magnetic generating device 5 includes an electromagnetic coil, and the electromagnetic coil is wound around the outside of the first connecting member 3. In the state where the electromagnetic coil is powered on, the electromagnetic coil generates a magnetic field to magnetize the first connecting member 3, and the first connecting member 3 can be used to enhance the magnetic field generated by the electromagnetic coil. After the first connecting member 3 is magnetized, its magnetic field can attract the second connecting member 4, thereby restricting the rotation or sliding between the first connecting member 3 and the second connecting member 4. After the electromagnetic coil is powered off, the first connecting member 3 demagnetizes, and further the first connecting member 3 and the second connecting member 4 can slide or rotate relative to each other.

[0044] Reference Figure 1 and Figure 3 As shown in, in some embodiments provided by the present utility model, the door body assembly further includes a switch 6. The switch 6 is connected to the magnetic generating device 5 and the power supply 7, and is used to control the on-off between the magnetic generating device 5 and the power supply 7.

[0045] In this embodiment, by providing a switch 6 between the magnet generating device 5 and the power source 7, the magnet generating device 5 can be more flexibly and conveniently controlled to switch between the energized state and the de-energized state through the switch 6. For example, after the opening position of the door body 1 is adjusted in place, the switch 6 can be closed to energize the magnet generating device 5, so that the first connecting member 3 generates a magnetic field to attract the second connecting member 4. When it is necessary to close the door body 1 or readjust the opening position of the door body 1, the switch 6 can be disconnected to de-energize the magnet generating device 5, so that the first connecting member 3 is demagnetized, and then it can slide or rotate relative to the second connecting member 4.

[0046] Optionally, the power source 7 can be the power source 7 of the working machine, or the power source 7 can also be a power source 7 dedicated to supplying power to the magnet generating device 5.

[0047] Refer to Figure 1 and Figure 3 As shown, in some embodiments provided by the present utility model, a door lock 101 is provided on the door body 1, and the door lock 101 is used to lock the door body 1 to the vehicle frame 2. The switch 6 is linked with the door lock 101, and when the door lock 101 is in the locked state, the switch 6 is closed, and when the door lock 101 is in the unlocked state, the switch 6 is disconnected.

[0048] In the related art, the wind hook is located inside the door body 1. After the door body 1 is opened and limited by the wind hook, when the operator is located outside the door body 1, the wind hook cannot be operated to release the limit, and it is necessary to detour to the inside of the door body 1 to remove the wind hook. In this embodiment, by linking the switch 6 with the door lock 101, when the operator is outside the door body 1, the switch 6 can be controlled to close by operating the door lock 101, so as to control the magnet generating device 5 to switch between energized and de-energized states, and then limit or release the limit of the door body 1. In this way, when the operator is outside the door body 1, there is no need to detour to the inside of the door body 1 to operate the magnet generating device 5, so that the limit of the door body 1 can be released more conveniently.

[0049] In addition, since the door lock 101 is usually provided at the side edge of the door body 1, when the operator is inside the door body 1, the hand can also be conveniently bypassed around the side edge of the door body 1 and extended to the outside of the door body 1 to operate the door lock 101 to limit or release the limit of the door body 1.

[0050] Refer to Figure 3 As shown, optionally, the switch 6 is set to a normally closed type, and the moving contact of the switch 6 is kept in electrical contact with the static contact under the action of an elastic member such as a spring. The elastic member can be set as a spring or a spring piece. The moving contact of the switch 6 is linked with the door lock 101. When the door lock 101 is in the locked state, the moving contact of the switch 6 contacts the static contact. When the door lock 101 is in the unlocked state, the moving contact of the switch 6 is disengaged from the static contact.

[0051] In some embodiments provided by the present utility model, the moving contact of the switch 6 can be arranged in linkage with the lock tongue 1011 of the door lock 101, that is, the moving contact of the switch 6 is connected to the lock tongue 1011 of the door lock 101, and the state in which the lock tongue 1011 is extended is the locked state of the door lock 101, and the state in which the lock tongue 1011 is retracted is the unlocked state of the door lock 101. For example, the moving contact of the switch 6 is directly connected to the lock tongue 1011, or the moving contact of the switch 6 is connected to the lock tongue 1011 through a connecting rod mechanism or a flexible rope. Accordingly, during the operation of the lock tongue 1011, the moving contact is directly driven to operate, or the moving contact is driven to operate through a connecting rod mechanism or a flexible rope.

[0052] Of course, the moving contact of the switch 6 is not limited to being arranged in linkage with the lock tongue 1011. For example, in other embodiments provided by the present utility model, the moving contact of the switch 6 is arranged in linkage with the lock handle of the door lock 101, that is, the moving contact of the switch 6 is connected to the lock handle of the door lock 101. The state in which the lock handle is reset corresponds to the locked state of the door lock 101, and the state in which the lock handle is pulled out or rotated corresponds to the unlocked state of the door lock 101. For example, the moving contact of the switch 6 is directly connected to the lock handle, or the moving contact of the switch 6 is connected to the lock handle through a connecting rod mechanism or a flexible rope. During the operation of the lock handle, the moving contact is directly driven to operate, or the moving contact is driven to operate through a connecting rod mechanism or a flexible rope.

[0053] In order to facilitate the operator to control the state of the magnetizing device 5 on the outside of the door body 1, it is not limited to setting the switch 6 in conjunction with the door lock 101. For example, in other embodiments provided by the utility model, the switch 6 is set on the outside of the door body 1. By setting the switch 6 on the outside of the door body 1, the operator can also conveniently control the state of the magnetizing device 5 on the outside of the door body 1. Further, in order to be able to control the state of the magnetizing device 5 on both the inside and outside of the door body 1, the switch 6 is set on the outside of the door body 1 and arranged close to the side edge of the door body 1, so that when the operator is on the inside of the door body 1, he can extend his hand around the side edge of the door body 1 to the outside of the door body 1 to operate the switch 6.

[0054] In some embodiments provided by the present invention, one of the first connecting member 3 and the second connecting member 4 includes a connecting rod 8 , and the other includes a connecting seat 9 .

[0055] The connecting rod 8 is rotatably connected to one of the door body 1 and the vehicle frame 2, and the connecting seat 9 is connected to the other of the door body 1 and the vehicle frame 2. As shown in the figure, the connecting rod 8 is rotatably connected to the vehicle frame 2, and the connecting seat 9 is connected to the door body 1. Of course, the opposite is also possible. The connecting seat 9 is provided with a through hole 901 for the connecting rod 8 to pass through and slide, and the magnetizing device 5 is connected to the connecting rod 8 or the connecting seat 9.

[0056] In this embodiment, in the state where the magnetizing device 5 is not powered on, during the rotation of the door body 1 relative to the vehicle frame 2, the connecting rod 8 slides along the through hole 901 of the connecting seat 9. In the state where the magnetizing device 5 is powered on, the connecting rod 8 and the connecting seat 9 are magnetically attracted to each other, and the connecting rod 8 and the connecting seat 9 are mutually limited in position, so that the door body 1 cannot rotate, and the door body 1 can be fixed at the current position.

[0057] In some embodiments provided by the present utility model, the connecting rod 8 includes a first rod segment 801, a second rod segment 802, and a third rod segment 803 that are connected in sequence. Both the first rod segment 801 and the third rod segment 803 are arranged at an angle with the second rod segment 802. For example, both the first rod segment 801 and the third rod segment 803 are perpendicular to the second rod segment 802.

[0058] Among them, the second rod segment 802 is slidably connected to the through hole 901, that is, the second rod segment 802 can slidably penetrate into the through hole 901.

[0059] The third rod segment 803 is rotatably connected to the door body 1 or the vehicle frame 2.

[0060] In the axial direction of the second rod segment 802, the first rod segment 801 is used to limit the position of the connecting seat 9.

[0061] In this embodiment, both the first rod segment 801 and the third rod segment 803 are arranged at an angle with the second rod segment 802, so that the structure of the connecting rod 8 is the same as or similar to that of the wind hook in the related art. Therefore, the wind hook in the related art can be used as the connecting rod 8, or the structural modification of the connecting rod 8 can be reduced, thereby reducing the improvement cost of the door body assembly. By providing the first rod segment 801, the connecting seat 9 can be limited in position in the axial direction of the second rod segment 802, preventing the connecting seat 9 from disengaging from the second rod segment 802 during the opening process of the door body 1 to ensure the stability of the door body assembly. In addition, the first rod segment 801 can also limit the maximum opening angle of the door body 1 to prevent the opening angle of the door body 1 from being too large, causing the problem of collision between the door body 1 and the vehicle frame 2.

[0062] In some embodiments provided by the present utility model, an installation hole for rotatably connecting with the connecting rod 8 is provided on the door body 1 or the vehicle frame 2, and specifically, the installation hole is rotatably connected to the third rod segment 803.

[0063] The through hole 901 on the connecting seat 9 is provided as an oval hole, and the length direction of the oval hole is arranged along the axial direction of the installation hole. In other words, the length direction of the oval hole is parallel to the axial direction of the installation hole. The length of the third rod segment 803 extending into the installation hole is less than or equal to the length of the oval hole.

[0064] When it is necessary to disassemble the connecting rod 8, the third rod section 803 needs to be withdrawn from the mounting hole. In this embodiment, since the length of the third rod section 803 extending into the mounting hole is less than or equal to the length of the waist-shaped hole, during the process of withdrawing the third rod section 803 from the mounting hole, the second rod section 802 can move along the length direction of the waist-shaped hole so that the third rod section 803 can be completely withdrawn from the mounting hole. Finally, the connecting rod 8 can be pulled out from the through hole 901. The installation process of the connecting rod 8 is the reverse process of the above process, so it will not be elaborated here.

[0065] It can be understood that the first connecting member 3 and the second connecting member 4 are not limited to the forms of the connecting rod 8 and the connecting seat 9 described above. For example, in other embodiments provided by the present invention, one of the first connecting member 3 and the second connecting member 4 includes a rotating shaft 10, and the other includes a shaft sleeve 11.

[0066] Among them, the rotating shaft 10 is connected to one of the door body 1 and the vehicle frame 2, the shaft sleeve 11 is connected to the other of the door body 1 and the vehicle frame 2, the rotating shaft 10 is rotatably connected to the shaft sleeve 11, and both the rotating shaft 10 and the shaft sleeve 11 are coaxial with the rotation axis of the door body 1. The magnetic generating device 5 is connected to the rotating shaft 10 or the shaft sleeve 11.

[0067] In this embodiment, in the state where the magnetic generating device 5 is not energized, during the rotation of the door body 1 relative to the vehicle frame 2, the rotating shaft 10 and the shaft sleeve 11 rotate relative to each other. In the state where the magnetic generating device 5 is energized, the rotating shaft 10 and the shaft sleeve 11 are magnetically attracted and limited to each other, so that the door body 1 cannot rotate, and the door body 1 can be fixed at the current position.

[0068] Optionally, the door body 1 and the vehicle frame 2 are rotatably connected through a hinge structure. Among them, the rotating shaft 10 and the shaft sleeve 11 can be used as the hinge structure to make the overall structure of the door body 1 more compact. Or, the rotating shaft 10 and the shaft sleeve 11 can also be independent of the hinge structure to improve the connection strength between the door body 1 and the vehicle frame 2.

[0069] An embodiment of the present invention also provides a working machine.

[0070] Specifically, the working machine includes a vehicle frame 2 and the door body assembly as described above. The door body 1 is rotatably connected to the vehicle frame 2.

[0071] It should be noted that since the working machine includes the door body assembly, it also includes all the above advantages of the door body assembly, so it will not be elaborated here.

[0072] The working machine includes but is not limited to a rotary drilling rig, an excavator, a crane, a pile driver, etc.

[0073] Although embodiments of the present utility model have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A door assembly, characterized in that: For mounting on a vehicle frame (2), comprising: A door body (1) is used for being rotatably connected to the vehicle frame (2); A first connecting member (3) and a second connecting member (4), which are slidably connected or rotatably connected, one of the first connecting member (3) and the second connecting member (4) is connected to the door body (1), and the other is used to be connected to the vehicle frame (2); The magnetizing device (5) is connected to the first connecting member (3), and is used to make the first connecting member (3) generate a magnetic field to attract the second connecting member (4) when powered on.

2. The door assembly according to claim 1, characterized in that: The door body assembly also includes a switch (6), which connects the magnetizing device (5) and the power supply (7) and is used to control the on / off between the magnetizing device (5) and the power supply (7).

3. The door assembly according to claim 2, characterized in that: The door body (1) is provided with a door lock (101), and the door lock (101) is used to lock the door body (1) to the vehicle frame (2). The switch (6) is arranged in linkage with the door lock (101), and when the door lock (101) is locked, the switch (6) is closed, and when the door lock (101) is unlocked, the switch (6) is opened.

4. The door assembly according to claim 3, characterized in that: The switch (6) is configured as a normally closed switch, wherein the moving contact of the switch is in electrical contact with the static contact under the action of an elastic member, and the moving contact is arranged in linkage with the door lock (101). When the door lock (101) is locked, the moving contact is in contact with the static contact, and when the door lock (101) is unlocked, the moving contact is disengaged from the static contact.

5. The door assembly according to any one of claims 1 to 4, characterized in that: The magnetization device (5) comprises an electromagnetic coil and an iron core, wherein the electromagnetic coil is wound around the outside of the iron core, and the iron core is connected to the first connecting member (3); Alternatively, the magnetizing device (5) comprises an electromagnetic coil, and the electromagnetic coil is wound around the outside of the first connecting member (3).

6. The door assembly according to any one of claims 1 to 4, characterized in that: One of the first connecting member (3) and the second connecting member (4) comprises a connecting rod (8), and the other comprises a connecting seat (9); The connecting rod (8) is rotatably connected to one of the door body (1) and the vehicle frame (2), the connecting seat (9) is connected to the other of the door body (1) and the vehicle frame (2), the connecting seat (9) is provided with a through hole (901) for the connecting rod (8) to pass through and slide, and the magnetizing device (5) is connected to the connecting rod (8) or the connecting seat (9).

7. The door assembly according to claim 6, characterized in that: The connecting rod (8) comprises a first rod segment (801), a second rod segment (802) and a third rod segment (803) which are connected in sequence, and the first rod segment (801) and the third rod segment (803) are both arranged at an angle to the second rod segment (802); Wherein, the second rod segment (802) is slidably connected to the through hole (901); The third rod section (803) is rotatably connected to the door body (1) or the vehicle frame (2); The first rod section (801) is used to limit the position of the connecting seat (9).

8. The door assembly according to claim 7, characterized in that: The door body (1) or the vehicle frame (2) is provided with a mounting hole rotatably connected to the connecting rod (8), the through hole (901) is set as a waist-shaped hole, the length direction of the waist-shaped hole is set along the axial direction of the mounting hole, and the length of the third rod segment (803) extending into the mounting hole is less than or equal to the length of the waist-shaped hole.

9. The door assembly according to any one of claims 1 to 4, characterized in that: One of the first connecting member (3) and the second connecting member (4) comprises a rotating shaft (10), and the other comprises a shaft sleeve (11); The rotating shaft (10) is connected to one of the door body (1) and the vehicle frame (2), the bushing (11) is connected to the other of the door body (1) and the vehicle frame (2), the rotating shaft (10) is rotatably connected to the bushing (11), and the rotating shaft (10) and the bushing (11) are both coaxial with the rotation axis of the door body (1), and the magnetizing device (5) is connected to the rotating shaft (10) or the bushing (11).

10. A working machine, characterized in that: It comprises a vehicle frame (2) and a door body assembly as claimed in any one of claims 1 to 9, wherein the door body (1) is rotatably connected to the vehicle frame (2).

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