Door components and engineering machinery

Abstract

This application provides a door assembly and engineering machinery. The door assembly includes a door body, a door frame, and at least one locking device. Each locking device includes a locking rod, an inner handle, and an outer handle. The locking rod is rotatably inserted through the door body, having an outer end on the outside of the door body and an inner end on the inside of the door body. The inner handle is fixed to the inner end of the locking rod and has an operating part and a latch. The operating part, under the action of external force, causes the latch to switch between an unlocked state and a locked state. The outer handle is fixed to the outer end of the locking rod and is used to drive the locking rod to rotate under the action of external force, thereby causing the latch to switch between an unlocked state and a locked state. The door assembly of this application allows operators to unlock and lock the door from both inside and outside the door, improving the convenience and safety of maintenance personnel.

Description

Technical Field

[0001] This application relates to door lock technology, and more particularly to a door assembly and engineering machinery. Background Technology

[0002] The trend towards larger excavators is currently prevalent in the excavator market, with excavators exceeding 200 tons gaining increasing attention and popularity among customers. However, as excavator tonnage increases, it becomes more difficult for operators and maintenance personnel to access the engine compartment for inspections. In related technologies, the engine compartment side door can only be opened from the outside, not from the inside, hindering maintenance work. Utility Model Content

[0003] This application provides a door assembly and engineering machinery, which can unlock and lock the door from the inside and outside.

[0004] To achieve the above objectives, this application adopts the following technical solution:

[0005] In a first aspect, this application provides a door assembly, including a door body and a door frame, wherein the door body is rotatably connected to the door frame for opening and closing at least a partial opening of the door frame; the door assembly further includes at least one locking device, each locking device comprising: a locking rod, which is rotatably disposed in the door body and has an inner end inside the door body and an outer end outside the door body; an inner handle, fixed to the inner end of the locking rod, the inner handle having an operating part and a latching part, the operating part causing the latching part to switch between an unlocked state and a locked state under the action of an external force; and an outer handle, fixed to the outer end of the locking rod, the outer handle being used to drive the locking rod to rotate under the action of an external force, thereby causing the latching part to switch between an unlocked state and a locked state.

[0006] As an optional implementation, each locking device also includes a latch, which is disposed on the door frame and has a lock groove; and when the latch is inserted into the lock groove, the latch is in a locked state; when the latch is disengaged from the lock groove, the latch is in an unlocked state.

[0007] As an alternative implementation, the lock groove has a downward opening, through which the latch extends into or out of the lock groove; the inner handle has a first fixing hole for fixed connection with the inner end of the lock bar, and the operating part and the latch are respectively located on both sides of the first fixing hole; and the weight of the operating part is greater than the weight of the latch.

[0008] As an alternative implementation, when the latch is in the locked state, the center of gravity of the outer handle is on one side of the operating part.

[0009] As an optional implementation, each locking device further includes: a support member fixed to the inner side of the door body, the support member having a support portion and two abutment portions, the two abutment portions being arranged opposite to each other, and the first ends of the two abutment portions abutting against the inner wall of the door body, the support portion being connected to the second ends of the two abutment portions; and a locking rod rotatably passing through the support portion.

[0010] As an optional implementation, each locking device includes: a connecting rod having a rod body and a rod cap disposed at a first end of the rod body, the rod body passing axially through the interior of the locking rod and the rod cap abutting against the outer end of the locking rod, and a second end of the rod body passing through the inner end of the locking rod; and a positioning member disposed at the second end of the rod body to restrict the axial degree of freedom of the locking rod together with the rod cap.

[0011] As an optional implementation, each locking device includes: an inner pressure plate, which is fixed to the side of the support portion away from the door body, and has a first limiting channel for the locking rod to pass through, thereby limiting the rotation position of the locking rod; and an outer pressure plate, which is fixed to the outside of the door body, and has a second limiting channel for the locking rod to pass through, thereby limiting the rotation position of the locking rod.

[0012] As an optional implementation, the inner handle has a first fixing hole, the inner end of the locking bar has a first mounting part, the first mounting part is connected to the hub of the first fixing hole, and the thickness of the first mounting part is greater than the thickness of the inner handle; and / or, the outer handle has a second fixing hole, the outer end of the locking bar has a second mounting part, the second mounting part is connected to the hub of the second fixing hole, and the thickness of the second mounting part is greater than the thickness of the outer handle.

[0013] As an optional implementation, there may be one or more locking devices; when there are multiple locking devices, the multiple locking devices are arranged at intervals along the height direction of the door.

[0014] Secondly, this application provides an engineering machinery, including the door assembly of any of the above.

[0015] The door assembly of this application features a locking rod that rotates circumferentially through the door body. The locking rod has an outer end on the outside of the door body and an inner end on the inside of the door body. An inner handle is fixed to the inner end of the locking rod and includes an operating part and a latch. The operating part, under external force, causes the latch to switch between an unlocked and locked state. An outer handle, fixed to the outer end of the locking rod, is used to rotate the locking rod under external force, thereby causing the latch to switch between an unlocked and locked state. Operators can apply external force to the inner handle from inside the door body to unlock and lock it, or apply external force to the outer handle from outside the door body to unlock and lock it. This solves the problem in existing technologies where excavators can only open the power compartment side door from the outside, improving the convenience and safety for maintenance personnel. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of a door assembly provided in an embodiment of this application;

[0018] Figure 2 An exploded view of the door assembly provided in an embodiment of this application;

[0019] Figure 3 A cross-sectional view of the door assembly provided in an embodiment of this application;

[0020] Figure 4 A schematic diagram of the locking rod, inner handle, and outer handle in the door assembly provided in the embodiments of this application;

[0021] Figure 5 A schematic diagram of the inner pressure plate and outer pressure plate in the door assembly provided in the embodiments of this application;

[0022] Figure 6 A cross-sectional view showing the installation relationship of the locking rod, connecting rod, and positioning element in the door assembly provided in this application embodiment.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100. Door body; 110. First rotating hole; 200. Door frame; 300. Locking device; 310. Locking rod; 312. First mounting part; 314. Second mounting part; 316. Inner end; 318. Outer end; 320. Inner handle; 322. Operating part; 324. Lock tongue; 326. First fixing hole; 330. Outer handle; 332. Second fixing hole; 340. Locking latch; 342. Lock groove; 344. Connecting block; 350. Support component; 352, Support part; 352a, Second rotating hole; 354, Abutting part; 360, Connecting rod; 362, Rod body; 364, Rod cap; 366, Outer washer; 370, Inner pressure plate; 372, Inner flat plate; 374, First extension tube; 374a, First limiting channel; 380, Outer pressure plate; 382, ​​Outer flat plate; 384, Second extension tube; 384a, Second limiting channel; 390, Positioning component; 392, Inner washer. Detailed Implementation

[0025] In the existing technology, the engine compartment side door can only be opened from the outside and cannot be opened from the inside, which is inconvenient for maintenance personnel to work, and in the event of an accident, the maintenance personnel in the engine compartment may be at risk of safety.

[0026] To overcome the shortcomings of existing technologies, this application provides a door assembly in which a locking rod is rotatably inserted through the door body. The locking rod has an outer end located on the outside of the door body and an inner end located on the inside of the door body. An inner handle is fixed to the inner end of the locking rod and has an operating part and a locking tongue part. Under the action of external force, the operating part causes the locking tongue part to switch between an unlocked state and a locked state. An outer handle is fixed to the outer end of the locking rod and is used to drive the locking rod to rotate under the action of external force, thereby causing the locking tongue part to switch between an unlocked state and a locked state. The operator can apply external force to the inner handle from inside the door body to unlock and lock the door, or apply external force to the outer handle from outside the door body to unlock and lock the door. This solves the problem in existing technologies where excavators can only open the power compartment side door from the outside, improving the convenience and safety of maintenance personnel.

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0028] See Figures 1 to 3 This application provides a door assembly that can be installed on construction machinery, including a door body 100 and a door frame 200. The door frame 200 has an opening, and the door body 100 is rotatably mounted on the door frame 200 to open and close at least part of the opening.

[0029] The gate assembly of this application can be installed on construction machinery; for example, the gate 100 can serve as a hood cover for an excavator. Of course, this gate assembly can also be applied to other fields and equipment, and this application does not impose any particular limitations on it.

[0030] In some embodiments, the door assembly may further include at least one locking device 300, which can be used to lock the door 100 to the door frame 200 or to engage a lock between the door 100 and the door frame 200.

[0031] See Figure 2 and Figure 3Furthermore, each locking device 300 may also include a locking rod 310, an inner handle 320, and an outer handle 330. The locking rod 310 is rotatably mounted on the door body 100, having an inner end 316 located inside the door body 100 and an outer end 318 located outside the door body 100. The inner handle 320 is fixed to the inner end 316 of the locking rod 310, and has an operating part 322 and a latch 324. The operating part 322, under the action of external force, causes the latch 324 to switch between an unlocked state and a locked state. The outer handle 330 is fixed to the outer end of the locking rod 310 and is used to drive the locking rod 310 to rotate under the action of external force, thereby causing the latch 324 to switch between an unlocked state and a locked state.

[0032] In some exemplary embodiments, a first rotating hole 110 is provided on the door body 100, and the locking rod 310 passes through the first rotating hole 110, such that its outer end 318 is outside the door body 100 and its inner end 316 is outside the door body 100.

[0033] Furthermore, a latch 340 can be installed on the door frame 200. An operator can apply external force to the operating part 322 of the inner handle 320, causing the inner handle 320 to rotate as a whole, so that the latch 324 of the inner handle 320 engages with the latch 340 on the door frame 200, thus locking the latch 324. An operator can also apply external force to the operating part 322 of the inner handle 320, causing the inner handle 320 to rotate as a whole, so that the latch 324 of the inner handle 320 disengages from the latch 340 on the door frame 200, thus unlocking the latch 324. Since the inner handle 320 is fixed to the locking rod 310, and the locking rod 310 passes through the first rotating hole 110, when the inner handle 320 rotates, the locking rod 310 can restrain the rotational position of the inner handle 320.

[0034] The outer handle 330 is fixed to the outer end 318 of the locking rod 310. The operator can also apply external force to the outer handle 330, causing the outer handle 330 to drive the locking rod 310 to rotate, which in turn causes the locking rod 310 to drive the inner handle 320 to rotate. When the inner handle 320 rotates, it can switch between the unlocked and locked states.

[0035] Therefore, in the locking device 300 of this embodiment, the operator can apply external force to the inner handle 320 from inside the door 100 to unlock and lock the door 100, and can also apply external force to the outer handle 330 from outside the door 100 to unlock and lock the door 100. This solves the problem in the prior art that the excavator can only open the power compartment side door from the outside, and improves the convenience and safety of maintenance personnel.

[0036] See Figure 2 and Figure 3In some embodiments, each locking device 300 may further include a latch 340 disposed on the door frame 200, the latch 340 having a lock groove 342. When the latch 324 extends into the lock groove 342, the latch 324 is in a locked state. When the latch 324 disengages from the lock groove 342, the latch 324 is in an unlocked state.

[0037] In some exemplary embodiments, the latch 340 may be installed on the side of the door frame 200 away from the rotating end of the door body 100, and the inner handle 320 may also be installed on the side of the door body 100 away from its rotating end, so as to lock the door body 100 onto the door frame 200.

[0038] Furthermore, when the latch 340 is installed on the door frame 200, the lock groove 342 is located on the rotation path of the latch 324 so that the latch 324 can enter the lock groove 342.

[0039] Furthermore, a connecting block 344 can be provided between the latch 340 and the door body 100. The connecting block 344 is fixed on the door frame 200, and the latch 340 is installed on the side of the connecting block 344 away from the door frame 200, so that a gap is formed between the latch 340 and the door frame 200 to accommodate the part of the latch tongue 324 that extends out of the latch 340, thus avoiding interference between the latch tongue 324 and the door frame 200 and the situation where it cannot enter the lock groove 342.

[0040] See Figure 2 and Figure 3 In some embodiments, the lock groove 342 has a downward opening through which the latch 324 extends into or out of the lock groove 342. The inner handle 320 has a first fixing hole 326 for fixed connection with the inner end 316 of the lock bar 310. The operating part 322 and the latch 324 are respectively located on both sides of the first fixing hole 326, and the weight of the operating part 322 is greater than the weight of the latch 324.

[0041] In this embodiment, the inner handle 320 forms a lever structure with the locking rod 310 as the fulcrum through the fixing hole 326, and the weight of the operating part 322 is greater than that of the locking tongue 324. According to the lever principle, when no external force is applied, the operating part 322 will sink downward due to its own weight, causing the locking tongue 324 to tilt upward. Thus, without the application of external force, the locking tongue 324 has an upward tendency. When the locking tongue 324 enters the locking groove 342, the locking tongue 324 can abut against the upper wall of the locking groove 342, so that the locking tongue 324 can maintain a stable locking state without being subjected to external force, preventing the door 100 from being mistakenly locked.

[0042] See Figures 2 to 4In some exemplary embodiments, the inner handle 320 can be an integrally molded long strip, and the sealing of each part is the same. The first fixing hole 326 on the inner handle 320 can be opened at a position off-center, so that the longer operating part 322 and the locking tongue part 324 with a shorter length than the operating part 322 can be divided, thereby making the weight of the operating part 322 greater than the weight of the locking tongue part 324.

[0043] Furthermore, when the latch 324 is in the locked state, the center of gravity of the outer handle 330 is on one side of the operating part 322.

[0044] As can be seen from the above, the inner handle 320 is fixedly connected to the inner end of the locking rod 310, and the outer handle 330 is fixedly connected to the outer end of the locking rod 310. Therefore, the inner handle 320 and the outer handle 330 are connected through the locking rod 310.

[0045] When the latch 324 is in the locked state, the center of gravity of the outer handle 330 is on one side of the operating part 322. This allows the outer handle 330 to increase the weight on one side of the operating part 322, so that when the latch 324 is in the lock groove 342, there is an upward force that causes it to abut against the upper wall of the lock groove 342, thereby making the latch 324 more stably locked.

[0046] In other words, in this embodiment, by setting the center of gravity of the outer handle 330 to one side of the operating part 322 of the inner handle 310, it can be made to abut against the upper wall of the lock groove 342, so that the latch 324 can be more stably locked. In this case, it is not necessary to set the weight of the operating part 322 of the inner handle 310 to be greater than the weight of the latch 324, and the latch can be stably locked without the application of external force.

[0047] See Figures 2 to 4 In some exemplary embodiments, the outer handle 330 is generally elongated, and a second fixing hole 332 is provided at one end of the outer handle 330. The second fixing hole 332 is fixedly connected to the locking rod 310. After the outer handle 330 is fixed to the locking rod 310, the orientation of the outer handle 330 is on the same straight line as the operating part 322 of the inner handle 320. This enables the center of gravity of the outer handle 330 to be on one side of the operating part 322.

[0048] Of course, in other embodiments, the outer handle 330 may also be at a certain angle to the operating part 322 of the inner handle 320. As long as the installation angle of the outer handle 330 can ensure that its center of gravity is on one side of the operating part 322 of the inner handle 320, the locking tongue 324 can be locked more stably.

[0049] See Figure 2 and Figure 3In some embodiments, each locking device 300 may further include a support member 350, which is fixed to the inner side of the door body 100. The support member 350 has a support portion 352 and two abutment portions 354, which are arranged opposite to each other. The first ends of the two abutment portions 354 abut against the inner wall of the door body 100, and the support portion 352 is connected to the second ends of the two abutment portions 354. The locking rod 310 is rotatably inserted through the support portion 352.

[0050] In this embodiment, the first ends of the two abutting parts 354 in the support member 350 abut against the inner wall of the door body 100, and the support part 352 is connected to the second ends of the two abutting parts 354. The support part 352 is provided with a second rotating hole 352a, which is directly opposite to the first rotating hole 110 on the door body 100. The locking rod 310 can be sequentially inserted into the first rotating hole 110 and the second rotating hole 352a.

[0051] When the door body 100 is thin, the locking rod 310 may not be effectively constrained in its rotational position by the door body 100. In this embodiment, the first ends of the two abutting parts 354 abut against the inner wall of the door body 100, and the support part 352 is connected between the second ends of the two abutting parts 354. When the locking rod 310 passes through the door body 100 and the support part 352, the door body 100 and the support part 352 can be constrained at two points along the length of the locking rod 310, so that the locking rod 310 can be perpendicular to the door body 100.

[0052] In some exemplary embodiments, the first ends of the two abutting portions 354 can be fixed to the inner wall of the door body 100 by welding.

[0053] See Figure 2 , Figure 3 and Figure 5 Furthermore, each locking device 300 may also include an inner pressure plate 370 and an outer pressure plate 380. The inner pressure plate 370 is fixed to the side of the support portion 352 opposite to the door body 100, and has a first limiting channel 374a through which the locking rod 310 passes, thereby limiting the rotational position of the locking rod 310. The outer pressure plate 380 is fixed to the outside of the door body 100, and has a second limiting channel 384a through which the locking rod 310 passes, thereby limiting the rotational position of the locking rod 310.

[0054] See Figure 5 In some exemplary embodiments, the inner pressure plate 370 has an inner flat plate 372 and a first extension tube 374. The inner flat plate 372 is provided with a first through hole, one end of the first extension tube 374 is connected to the first through hole, and a first limiting channel 374a is formed in the first extension tube 374.

[0055] The outer pressure plate 380 has an outer flat plate 382 and a second extension tube 384. The outer flat plate 382 is provided with a second through hole. One end of the second extension tube 384 is connected to the second through hole. The second limiting channel 384a is formed in the second extension tube 384.

[0056] When installing the inner pressure plate 370, the inner plate 372 is attached to the side of the support part 352 away from the door body 100, so that the first limiting channel 374a and the second rotating hole 352a are directly opposite each other, and the inner plate 372 and the support part 352 are fixedly connected by fasteners.

[0057] When installing the outer pressure plate 380, the outer plate 382 is attached to the outer surface of the door body 100 so that the second limiting channel 384a is aligned with the first rotating hole 110, and the outer plate 382 is fixedly connected to the support part 352 using fasteners.

[0058] The locking rod 310 can pass through the second limiting channel 384a of the outer pressure plate 380, the first rotating hole 110 on the door body 100, and the second rotating hole 352a on the support part 352 in sequence from the outside to the inside, and finally pass out from the first limiting channel 374a of the inner pressure plate 370. In this way, the second limiting channel 384a, the first rotating hole 110, the second rotating hole 352a and the first limiting channel 374a can all constrain the locking rod 310.

[0059] See Figure 2 , Figure 3 and Figure 6 In some embodiments, each locking device 300 may further include a connecting rod 360 and a positioning member 390. The connecting rod 360 has a rod body 362 and a rod cap 364 disposed at a first end of the rod body 362. The rod body 362 passes axially through the interior of the locking rod 310, and the rod cap 364 abuts against the outer end 318 of the locking rod 310. The second end of the rod body 362 extends out of the inner end 316 of the locking rod 310. The positioning member 390 is disposed at the second end of the rod body 362 to restrict the axial degree of freedom of the locking rod 310 together with the rod cap 364.

[0060] In some exemplary embodiments, the locking rod 310 may also be configured as a hollow structure open to both ends in the axial direction. The rod body 362 of the connecting rod 360 may be inserted into the interior of the locking rod 310 from the outside to the inside, and the second end of the rod body 362 extends out of the inner end 316 of the locking rod 310. The rod cap 364 of the connecting rod 360 is located at the outer end of the locking rod 310 and abuts against the outer end 318 of the locking rod 310. Typically, the contour of the rod cap 364 protrudes from the contour of the outer end of the locking rod 310, so the rod cap 364 can act as a stopper at the outer end. When the locking rod 310 is subjected to an axial inward force, the rod cap 364 can constrain the axial inward degree of freedom of the locking rod 310.

[0061] It should be noted that the contact between the rod cap 364 and the outer end 318 of the locking rod 310 can refer to either direct contact or indirect contact, for example... Figure 6 As shown, an outer washer 366 can also be clamped between the rod cap 364 and the outer end 318 of the locking rod 310 to increase the contact area and friction.

[0062] The second end of the rod 362 is provided with a recessed platform stage, the outer periphery of which is provided with external threads. The positioning element 364 can be a nut, which is fastened to the recessed platform stage. In this way, the nut can act as a stop at the outer end. When the locking rod 310 is subjected to an axial outward force, the nut can restrict the axial outward degree of freedom of the locking rod 310. In addition, an inner washer 392 can be provided at the nut to enhance the contact area and friction, thereby improving the stability of the nut.

[0063] See Figure 4 In some embodiments, the inner handle 320 has a first fixing hole 326, the inner end 316 of the locking rod 310 has a first mounting portion 312, the first mounting portion 312 is connected to the first fixing hole 326, and the thickness of the first mounting portion 312 is greater than the thickness of the inner handle 320.

[0064] In some exemplary embodiments, the first mounting part 312 may be the circumferential surface of the locking bar 310 that is recessed and surrounds the locking bar 310, and the outline of the circumferential surface may be set to be non-circular (e.g., polygonal, D-shaped, etc.). Correspondingly, the first fixing hole 326 on the inner handle 320 may also be set to be non-circular. In this way, after the first mounting part 312 extends into the first fixing hole 326 of the inner handle 320, the inner handle 320 can drive the locking bar 310 to rotate when it rotates.

[0065] In some exemplary embodiments, the first mounting part 312 and the first fixing hole 326 can also be connected to the hub by force closure (i.e., interference fit).

[0066] In this embodiment, the thickness of the first mounting portion 312 (specifically, the length of the circumferential surface along the axial direction of the locking rod 310) is greater than the thickness of the inner handle 320. This allows the inner handle 320 to move slightly within the first mounting portion 312, preventing the inner handle 320 from being jammed by external components and avoiding the inner handle 320 from being unable to rotate.

[0067] In some embodiments, the outer handle 330 has a second fixing hole 332, the outer end 318 of the locking rod 310 has a second mounting portion 314, the second mounting portion 314 is connected to the hub of the second fixing hole 332, and the thickness of the second mounting portion 314 is greater than the thickness of the outer handle 330.

[0068] In some exemplary embodiments, the second mounting part 314 may be the circumferential surface of the locking bar 310 that is recessed and surrounds the locking bar 310, and the outline of the circumferential surface may be set to be non-circular (e.g., polygonal, D-shaped, etc.). Correspondingly, the second fixing hole 332 of the outer handle 330 may also be set to be non-circular. In this way, after the second mounting part 314 extends into the second fixing hole 332 of the outer handle 330, the outer handle 330 can drive the locking bar 310 to rotate when it rotates.

[0069] In some exemplary embodiments, the second mounting portion 314 and the second fixing hole 332 can also achieve a hub connection by force closure (i.e., interference fit).

[0070] In this embodiment, the thickness of the second mounting portion 314 (specifically, the length of the circumferential surface along the axial direction of the locking rod 310) is greater than the thickness of the outer handle 330, so that the outer handle 330 can move slightly within the second mounting portion 314, preventing the outer handle 330 from being jammed by external components and avoiding the outer handle 330 from being unable to rotate.

[0071] See Figure 1 In some embodiments, there is one or more locking devices 300. When there are multiple locking devices 300, the multiple locking devices 300 are arranged at intervals along the height direction of the door body 100.

[0072] This application also provides a construction machinery, which may be an excavator or the like, and may include the gate assembly in any of the above embodiments.

[0073] Because the locking rod 310 is circumferentially rotatable through the door body 100, the locking rod 310 has an outer end on the outside of the door body 100 and an inner end on the inside of the door body 100. The inner handle 320 is fixed to the inner end of the locking rod 310. The inner handle 320 has an operating part 322 and a locking tongue part 324. Under the action of external force, the operating part 322 causes the locking tongue part 324 to switch between the unlocked and locked states. The outer handle 330 is fixed to the outer end of the locking rod 310 and is used to drive the locking rod 310 to rotate under the action of external force, thereby causing the locking tongue part 324 to switch between the unlocked and locked states. The operator can apply external force to the inner handle 320 from inside the door body 100 to unlock and lock the door body 100, or apply external force to the outer handle 330 from the outside of the door body 100 to unlock and lock the door body 100. This solves the problem in the prior art that the excavator can only open the power compartment side door from the outside, improving the convenience and safety of maintenance personnel.

[0074] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0075] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0076] It should be readily understood that the terms “on,” “above,” and “on top of” in this application should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0077] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90° or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A door assembly comprising: The door assembly includes a door body and a door frame, the door body being rotatably connected to the door frame for opening and closing at least a partial opening in the door frame; the door body assembly also includes at least one locking device, each of the locking devices comprising: A locking rod, which is rotatable around its own circumference and passes through the door body, the locking rod having an inner end inside the door body and an outer end outside the door body; An inner handle is fixed to the inner end of the locking rod. The inner handle has an operating part and a locking tongue. Under the action of external force, the operating part causes the locking tongue to switch between an unlocked state and a locked state. An external handle is fixed to the outer end of the locking rod. The external handle is used to drive the locking rod to rotate under the action of external force, thereby causing the locking tongue to switch between the unlocked state and the locked state.

2. The door assembly according to claim 1, characterized in that, Each of the locking devices further includes a latch, the latch being disposed on the door frame, the latch having a locking groove; and... When the latch extends into the lock groove, the latch is in the locked state; When the latch disengages from the lock groove, the latch is in the unlocked state.

3. The door assembly according to claim 2, characterized in that, The lock groove has a downward opening, through which the lock tongue extends into or disengages from the lock groove; The inner handle has a first fixing hole for fixed connection with the inner end of the locking bar, and the operating part and the locking tongue are respectively located on both sides of the first fixing hole; and, The weight of the operating part is greater than the weight of the locking tongue.

4. The door assembly according to any one of claims 1 to 3, characterized in that, When the latch is in the locked state, the center of gravity of the outer handle is on one side of the operating part.

5. The door assembly according to any one of claims 1 to 3, characterized in that, Each of the locking devices further includes: A support member is fixed to the inner side of the door body. The support member has a support part and two abutting parts. The two abutting parts are arranged opposite to each other, and the first ends of the two abutting parts abut against the inner wall of the door body. The support part is connected to the second ends of the two abutting parts. The locking rod is rotatably inserted through the support portion.

6. The door assembly according to claim 5, characterized in that, Each of the locking devices includes: A connecting rod having a rod body and a rod cap disposed at a first end of the rod body, the rod body being axially inserted into the interior of the locking rod and the rod cap abutting against the outer end of the locking rod, and a second end of the rod body extending out of the inner end of the locking rod; A positioning element is disposed at the second end of the rod body to restrict the axial degree of freedom of the locking rod in conjunction with the rod cap.

7. The door assembly according to claim 5, characterized in that, Each of the locking devices includes: An inner pressure plate is fixed to the side of the support part away from the door body. The inner pressure plate has a first limiting channel for the locking rod to pass through, so as to limit the rotation position of the locking rod. An outer pressure plate is fixed to the outside of the door body. The outer pressure plate has a second limiting channel for the locking rod to pass through, so as to limit the rotation position of the locking rod.

8. The door assembly according to any one of claims 1 to 3, characterized in that, The inner handle has a first fixing hole, and the inner end of the locking rod has a first mounting portion. The first mounting portion is connected to the hub of the first fixing hole, and the thickness of the first mounting portion is greater than the thickness of the inner handle; and / or, The outer handle has a second fixing hole, and the outer end of the locking rod has a second mounting part. The second mounting part is connected to the hub of the second fixing hole, and the thickness of the second mounting part is greater than the thickness of the outer handle.

9. The door assembly according to any one of claims 1 to 3, characterized in that, The locking device may be one or more; When there are multiple locking devices, the multiple locking devices are arranged at intervals along the height direction of the door body.

10. A working machine, characterized in that Includes the door assembly according to any one of claims 1 to 9.

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