Folding door device for construction machinery and construction machinery

Abstract

The utility model relates to the technical field of construction machinery, and discloses a folding door device for construction machinery, comprising: a door frame for connecting with a rotary table of the construction machinery; the door body assembly comprises a first door body and a second door body, the second door body is connected with the door frame in a relatively rotating mode, the upper end of the first door body is connected with the second door body in a relatively rotating mode, and the lower end of the first door body is movably assembled on the door frame; when the second door body rotates in the preset door opening direction relative to the door frame, the lower end of the first door body is driven by the second door body to move towards the door frame, and therefore the folding door device is opened. The folding door device is convenient to operate, space is saved, and safety and construction efficiency are improved. The utility model further discloses a construction machine.

Description

Technical Field

[0001] The present application relates to the field of construction machinery, and in particular to a folding door device for a construction machinery and a construction machinery. Background Art

[0002] Construction machinery and equipment are generally used in construction scenarios such as bridge and road construction, building construction, and mineral mining. Common construction machinery and equipment include drilling rigs, excavators, and shield machines. The turntables of large-scale construction machinery and equipment are generally equipped with left and right doors for personnel to enter and maintain, and the left and right doors are hinged to one side of the turntable. However, when large-scale construction machinery and equipment need to open the left and right doors for maintenance and inspection, it is usually necessary to stand on the crawler tracks to operate, and the movement space on the crawler tracks is limited. When one side door is opened, the operator must go around to the side of the open door to enter the interior of the construction machinery and equipment for inspection and maintenance. This design brings many inconveniences to operation, especially when working in a small space, further increasing the difficulty and safety factors of operation. In addition, the left and right doors are located on the sides of the cab. The cab door is generally hinged on one side and opens to the rear of the vehicle body. When the cab door and the left and right doors are opened simultaneously, they easily interfere with each other. When the driver wants to exit the cab and enter the construction machinery for maintenance, he must first close the cab door, then open one of the left and right doors, and then go around to the open side to enter the interior, affecting work efficiency and the convenience of personnel entry and exit. At the same time, the left and right doors are prone to collisions when opened to the left and right, increasing safety risks. These problems not only affect the operating efficiency of construction machinery, but also pose hidden dangers to the safety of the work site, and urgently need to be improved through optimized design. Utility Model Content

[0003] In order to solve the above-mentioned problems, the present application provides a folding door device for a construction machine and a construction machine.

[0004] The present application provides a folding door device for a construction machine, comprising:

[0005] a door frame, the door frame being used to connect to a turntable of a construction machine;

[0006] At least one door assembly, the door assembly comprising a first door body and a second door body, the second door body being rotatably connected to the door frame, the upper end of the first door body being rotatably connected to the second door body, and the lower end of the first door body being movably assembled to the door frame;

[0007] When the second door body rotates relative to the door frame toward a preset door opening direction, the lower end of the first door body moves toward the door frame driven by the second door body, thereby opening the folding door device.

[0008] In one embodiment, the door frame includes a first door frame and a second door frame, the second door body is rotatably connected to the first door frame, and the lower end of the first door body is movably assembled on the second door frame.

[0009] In one embodiment, the folding door device further includes a guide assembly, which is assembled between the first door body and the second door frame, and is used to guide the first door body to move up and down along the second door frame, and to be in the same plane or folded with the second door body. After the first door body and the second door body are folded, they form a horizontal passage with the door frame for people to enter and exit.

[0010] In one embodiment, the folding door device further comprises a hinge assembly, wherein the hinge assembly comprises:

[0011] a first hinge element, disposed between the second door body and the first door frame, for hinge-connecting the second door body to the first door frame;

[0012] The second hinge element is arranged between the first door body and the second door body, and is used to hinge the first door body and the second door body.

[0013] In one embodiment, the first hinge element includes a first page plate, a second page plate and a pivot shaft connecting the first page plate and the second page plate; the first page plate is threaded or welded to the second door body, and the second page plate is threaded or welded to the first door frame.

[0014] In one embodiment, the second hinge element includes a first page plate, a second page plate and a pivot shaft connecting the first page plate and the second page plate; the first page plate is threaded or welded to the first door body, and the second page plate is threaded or welded to the second door body.

[0015] In one embodiment, the second hinge element further includes a buffer device sleeved outside the pivot shaft, for forming a buffer when the first page and the second page approach each other.

[0016] In one embodiment, the second hinge element further includes a locking structure, which includes a first clamping portion provided on the board surface of the first page panel and a second clamping portion provided on the board surface of the second page panel. When the first page panel and the second page panel are in a folded state, the first clamping portion and the second clamping portion are clamped with each other to lock the first page panel and the second page panel.

[0017] In one embodiment, the folding door device further includes an elastic component, one end of which is connected to the first door frame, and the other end of which is connected to the second door body, for providing buffering and support for the opening and closing of the folding door device.

[0018] In one embodiment, the elastic component is a gas spring, which includes a cylinder body, a piston rod, a first fixing member and a second fixing member, the first fixing member is connected to the cylinder body, the second fixing member is connected to the end of the piston rod, the first fixing member is fixedly connected to the first door frame, and the second fixing member is fixedly connected to the second door body.

[0019] In one embodiment, the gas spring further comprises a rigid protective sleeve, a first end of which is sealingly sleeved onto the end of the piston rod and / or the second fixing member, and a second end of which is sealingly and slidably sleeved onto the cylinder body.

[0020] In one embodiment, the guide assembly comprises:

[0021] A guide rail, wherein the guide rail is provided on the second door frame;

[0022] A moving element is connected to the first door body and is arranged in the guide rail so as to be movable up and down, and is used to guide the first door body and the second door body to rotate relative to each other by moving up and down along the guide rail, thereby realizing the opening and closing of the folding door device.

[0023] In one embodiment, the guide assembly further includes a connecting rod, one end of which is connected to the moving element, and the other end of which is fixed to the first door body.

[0024] In one embodiment, the guide rail includes an anti-slip edge, which is provided at the top of the guide rail and makes the width of the top of the guide rail smaller than the width of the moving element, so as to limit the moving element from slipping out.

[0025] In one embodiment, the guide rail includes a through hole for disengaging the moving element, and the through hole is arranged above the guide rail.

[0026] In one embodiment, the moving element is at least one of a slider, a pulley, and a rolling bearing.

[0027] In one embodiment, the guide assembly further includes a limiting member provided on the guide rail for limiting the position of the moving element.

[0028] In one embodiment, the folding door device further includes a locking assembly, which is disposed between the first door body and the first door frame and is used to lock the first door body.

[0029] In one embodiment, the locking assembly includes a door lock and a lock plate. The door lock is provided on the first door body. The lock plate is fixedly connected to the first door frame to cooperate with the door lock to lock the first door body.

[0030] In one embodiment, the folding door device further includes a handle, and the handle is fixed on the first door body.

[0031] Another embodiment of the present application provides a construction machine, including a turntable, a cab arranged on the turntable, and a folding door device for the construction machine, wherein the folding door device is arranged on the side of the cab and is threadedly connected to the turntable.

[0032] The beneficial effects of the present invention are that the folding door device can be opened and closed in the up and down directions through the relative rotation of the first door body and the second door body, and the operator can open and close the folding door device without taking a detour, which greatly improves the convenience of operation. At the same time, when the folding door device is in the open state, the first door body and the second door body fold together above the entrance passage without occupying additional horizontal space, making the activity space inside the construction machinery more spacious, and also forming a specially protected passage area that can withstand all weather conditions, avoiding bumps to a certain extent, and improving safety and construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 It is a front view schematic diagram of a folding door device for construction machinery according to one embodiment of the present invention.

[0035] Figure 2 The figure is a rear view schematic diagram of a folding door device for construction machinery according to an embodiment of the present invention.

[0036] Figure 3 The figure is a top view of a folding door device for construction machinery according to an embodiment of the present invention.

[0037] Figure 4 This is a schematic diagram of a folding door device for a construction machine in a folded state according to an embodiment of the present invention. DETAILED DESCRIPTION

[0038] Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the description of the present invention, all other embodiments derived by persons of ordinary skill in the art without inventive effort are also within the scope of protection of the present invention.

[0039] In the description of this utility model, unless otherwise specified or limited, the terms "disposed," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms based on the specific circumstances.

[0040] The directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience and simplification of description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the utility model.

[0041] The terms "first," "second," "third," etc. are merely used to distinguish elements of similar nature and do not indicate or imply relative importance or a particular order.

[0042] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than the listed elements and may also include additional elements not specifically listed.

[0043] Please refer to Figure 1-4 , which shows a folding door device for construction machinery provided in one embodiment of the utility model, comprising:

[0044] Door frame, which is used to connect with the turntable of the construction machinery;

[0045] At least one door assembly 3a, 3b, 3c, the door assembly 3a, 3b, 3c includes a first door body 31 and a second door body 32, the second door body 32 is rotatably connected to the door frame, the upper end of the first door body 31 is rotatably connected to the second door body 32, and the lower end of the first door body 31 is movably assembled to the door frame;

[0046] When the second door body 32 rotates relative to the door frame in a preset door opening direction, the lower end of the first door body 31 moves toward the door frame driven by the second door body 32, thereby opening the folding door device.

[0047] Specifically, the door frame, as a support frame of the entire folding door device, is installed on the slewing ring of the construction machinery by screwing or welding. There is at least one door body assembly, and multiple door body assemblies can also be provided according to needs, such as Figure 1 As shown in the figure, there are three door body assemblies in this embodiment, which are door body assembly 3a, door body assembly 3b, and door body assembly 3c. Each door body assembly includes a first door body 31 and a second door body 32. Each second door body 32 is rotatably connected to the door frame, and the upper end of each first door body 31 is rotatably connected to the corresponding second door body 32. The lower end of each first door body 31 is movably assembled on the door frame.

[0048] When the folding door device is opened, under the action of an external force, the second door body 32 rotates relative to the door frame towards the preset door opening direction, and the lower end of the first door body 31 moves upwards in the vertical direction of the door frame under the driving of the second door body 32, so that the first door body 31 gradually rotates relative to the second door body 32 and folds inwardly of the second door body 32, until it is completely folded and protrudes above the door frame. At this time, the folding door device is in a completely open state, and the door body assembly and the door frame form a horizontal passage for personnel to enter and exit; in another case, under the action of an external force, the lower end of the first door body 31 moves upwards in the vertical direction of the door frame, thereby driving the second door body 32 to rotate relative to the door frame towards the preset door opening direction, so that the first door body 31 gradually rotates relative to the second door body 32 and folds inwardly of the second door body 32, until it is completely folded and protrudes above the door frame. At this time, the folding door device is in a completely open state, and the door body assembly and the door frame form a horizontal passage for personnel to enter and exit.

[0049] In this way, the operator can easily enter the inspection and maintenance without detouring, greatly improving the convenience of operation, and without occupying additional horizontal space, making the internal activity space of the construction machinery more spacious. The folding of the first door body 31 and the second door body 32 forms a protective roof above the passage, which is particularly advantageous in bad weather. Since the first door body 31 folds inwardly of the second door body 32, it avoids bumping to some extent, and also improves safety and construction efficiency.

[0050] When the folding door device is closed, under the action of external force, the second door body 32 rotates relative to the door frame in the preset closing direction, and the lower end of the first door body 31 moves downward in the vertical direction of the door frame driven by the second door body 32, and the first door body 31 gradually rotates relative to the second door body 32 toward the inner side of the second door body 32 away from the second door body 32 until it is completely in the same horizontal plane with the second door body 32, at this time the folding door device is in a fully closed state; in another case, under the action of external force, the lower end of the first door body 31 moves downward in the vertical direction of the door frame, thereby driving the second door body 32 to rotate relative to the door frame in the preset closing direction, so that the first door body 31 gradually rotates relative to the second door body 32 toward the inner side of the second door body 32 away from the second door body 32 until it is completely in the same horizontal plane with the second door body 32, at this time the folding door device is in a fully closed state.

[0051] In one embodiment, the door frame includes a first door frame 1 and a second door frame 2 , the second door body 32 is rotatably connected to the first door frame 1 , and the lower end of the first door body 31 is movably assembled on the second door frame 2 .

[0052] In this embodiment, when the second door body 32 rotates relative to the first door frame 1 toward a preset opening or closing direction, the lower end of the first door body 31 moves up and down toward the second door frame 2 driven by the second door body 32, thereby opening or closing the folding door device.

[0053] In one embodiment, the folding door device further includes a guide assembly 4, which is assembled between the first door body 31 and the second door frame 2, and is used to guide the first door body 31 to move up and down along the second door frame 2, and to be in the same plane or folded with the second door body 32. After the first door body 31 and the second door body 32 are folded, they form a horizontal passage with the door frame for people to enter and exit.

[0054] In this embodiment, the guide assemblies 4 are respectively assembled between the two sides of the lower end of the first door body 31 and the second door frame 2. When the folding door device is opened or closed, the guide assemblies 4 guide the first door body 31 to move up and down along the second door frame 2, and to be in the same plane or folded with the second door body 32, making the folding door device easier to open and close while also reducing noise.

[0055] In one embodiment, the folding door device further comprises a hinge assembly, the hinge assembly comprising:

[0056] The first hinge element 8 is provided between the second door body 32 and the first door frame 1 and is used to hinge the second door body 32 to the first door frame 1;

[0057] The second hinge element 9 is disposed between the first door body 31 and the second door body 32 and is used to hinge the first door body 31 and the second door body 32 .

[0058] The first hinge element 8 hinges the second door body 32 to the first door frame 1, and the second door body 32 can rotate relative to the first door frame 1 within a certain angle range; the second hinge element 9 hinges the first door body 31 to the second door body 32, and the first door body 31 can rotate relative to the second door body 32 within a certain angle range. Through the cooperation of the first hinge element 8 and the second hinge element 9, the first door body 31 and the second door body 32 can be smoothly folded up and down.

[0059] In one embodiment, the first hinge element 8 includes a first page plate 81, a second page plate 83 and a pivot shaft 82 connecting the first page plate and the second page plate; the first page plate 81 is threaded or welded to the second door body 32, and the second page plate 83 is threaded or welded to the first door frame 1.

[0060] In this embodiment, the first leaf plate 81 is threadedly connected to the upper end of the second door body 32, and the second leaf plate 83 is threadedly connected to the first door frame 1. The second door body 32 can rotate about the pivot axis 82. The first hinge element 8 can be arranged at intervals on both sides and in the middle of the second door body 32 and the first door frame 1. For example, a first hinge element 8 is respectively arranged on both sides and in the middle of the second door body 32, so that the hinge connection between the second door body 32 and the first door frame 1 is more secure, with better reliability and stability. As needed, additional first hinge elements 8 can be arranged at intervals on both sides or in the middle of the upper end of the second door body 32 to be hinged to the first door frame 1, making the hinge connection more stable and secure.

[0061] In one embodiment, the second hinge element 9 includes a first page plate, a second page plate and a pivot shaft connecting the first and second pages; the first page plate is threaded or welded to the first door body 31 , and the second page plate is threaded or welded to the second door body 32 .

[0062] In this embodiment, the first leaf plate is threadedly connected or welded to the upper end of the first door body 31, and the second leaf plate is threadedly connected or welded to the lower end of the second door body 32. The first door body 31 or the second door body 32 can rotate about the pivot axis. The second hinge elements 9 can be arranged at intervals on both sides and in the middle of the first door body 31 and the second door body 32. For example, a second hinge element 9 is respectively arranged on both sides and in the middle of the upper end of the first door body 31, so that the hinge connection between the first door body 31 and the second door body 32 is more secure, with better reliability and stability. As needed, additional second hinge elements 9 can be arranged at intervals on both sides or in the middle of the upper end of the first door body 31 to hinge with the second door body 32, making the hinge connection more stable and secure.

[0063] Furthermore, in order to ensure that the first door body 31 and the second door body 32 are folded up and down more smoothly, the first hinge element 8 and the second hinge element 9 are symmetrically arranged on both sides and the middle of the upper and lower ends of the second door body 32.

[0064] In one embodiment, the second hinge element 9 further includes a buffer device sleeved outside the pivot axis, which is used to provide a buffer when the first leaf plate and the second leaf plate approach each other.

[0065] A buffer device is a device capable of absorbing the kinetic energy of an object, such as a torsion spring, damper, or rubber member. In this embodiment, the buffer device is disposed outside the pivot shaft. As the first and second door bodies 31, 32 gradually fold, absorbing the kinetic energy of the first or second leaf plate, the device acts as a buffer, thereby reducing the impact force of the first door body 31 on the second door body 32 and effectively protecting the door assembly from damage.

[0066] In one embodiment, the second hinge element 9 also includes a locking structure, which includes a first clamping portion arranged on the board surface of the first page panel and a second clamping portion arranged on the board surface of the second page panel. When the first page panel and the second page panel are in a folded state, the first clamping portion and the second clamping portion are clamped with each other to lock the first page panel and the second page panel.

[0067] In this embodiment, the first leaf plate is threadedly connected to the upper end of the first door body 31, and the second leaf plate is threadedly connected to the lower end of the second door body 32. When the folding door device is in the fully open state, the first door body 31 and the second door body 32 are completely folded, allowing the first leaf plate to fold onto the second leaf plate, achieving mutual locking of the first and second leaf plates, thereby fixing the first and second door bodies 31 and 32. This prevents the first door body 31 from moving downward due to gravity, wind, or accidental contact, causing the folding door device to close, thereby preventing the operator from being injured during passage, thereby improving stability and safety.

[0068] In one embodiment, in order to improve the stability and durability of the first clamping portion and the second clamping portion, the first clamping portion and the second clamping portion are welded to the first page plate and the second page plate respectively by welding.

[0069] In one embodiment, the folding door device further includes an elastic component 5, one end of the elastic component 5 is connected to the first door frame 1, and the other end is connected to the second door body 32, for providing buffering and support for the opening and closing of the folding door device.

[0070] The elastic component 5 is a device that provides cushioning and support, such as a gas spring, hydraulic rod, mechanical spring, hydraulic damper, or a device similar to a telescopic rod structure. The elastic component 5 can be arranged in two ways: the first is a pair of elastic components 5 located on either side of the door assembly, with one end of the paired elastic components 5 connected to the first door frame 1 and the other end to the second door body 32. The second is a single elastic component 5 located on either side and in the middle of the door assembly, with one end connected to the first door frame 1 and the other end to the second door body 32. The number of elastic components 5 can also be increased as needed to ensure that the first and second door bodies 31, 32 fold up and down quickly and smoothly, further improving stability and reliability. The elastic components 5 make the folding door system smoother when opening and closing, avoiding noise and damage to the door assembly caused by violent impacts.

[0071] When the folding door device is opened, only a very small force needs to be applied. Driven by the guide assembly 4 and the elastic component 5, the first door body 31 automatically and smoothly moves upward. Under the action of the second hinge element 9, the first door body 31 and the second door body 32 are folded. At the same time, the elastic component 5 supports the second door body 32, so that the door body assembly is in an open state.

[0072] In one embodiment, the elastic component 5 is a gas spring, which includes a cylinder body, a piston rod, a first fixing member and a second fixing member. The first fixing member is connected to the cylinder body, the second fixing member is connected to the end of the piston rod, the first fixing member is fixedly connected to the first door frame 1, and the second fixing member is fixedly connected to the second door body 32.

[0073] In this embodiment, the elastic component 5 is a gas spring, and the elastic force and stroke of the gas spring can be adjusted as needed to ensure that the door assembly is both fast and stable during the opening and closing process.

[0074] In one embodiment, the gas spring further comprises a rigid protective sleeve, a first end of which is sealingly sleeved on the end of the piston rod and / or the second fixing member, and a second end of which is sealingly and slidably sleeved on the cylinder body.

[0075] When gas springs are used in non-enclosed spaces or outdoor environments, external sand, dust or rainwater will adhere to the surface of the piston rod. As the piston rod moves, it will damage the surface of the piston rod or the seal used to seal the cylinder and piston rod and cause seal failure, resulting in damage to the gas spring or loss of function.

[0076] A rigid protective sleeve protects the piston rod, preventing damage or loss of function to the gas spring. Compared to plastic and rubber materials, the rigid sleeve offers superior corrosion and weather resistance, making it resistant to external factors such as dust, rain, and sunlight. Furthermore, the rigid sleeve can be equipped with a reinforcement layer or corrosion-resistant coating to further protect against external factors.

[0077] In one embodiment, the guide assembly 4 includes:

[0078] The guide rail 41 is provided on the second door frame 2;

[0079] The moving element 42 is connected to the first door body 31 and is arranged in the guide rail 41 so as to be movable up and down. It is used to guide the first door body 31 and the second door body 32 to rotate relative to each other by moving up and down along the guide rail 41 to realize the opening and closing of the folding door device.

[0080] In this embodiment, guide rails 41 are provided on the edges of the second door frame 2 on both sides of the door body assembly, and moving elements 42 are provided on both sides of the lower end of the first door body 31. The moving elements 42 are placed in the guide rails 41. When the folding door device is opened, the moving elements 42 move upward along the guide rails 41, and the first door body 31 drives the second door body 32 to rotate around the first door frame 1. The first door body 31 gradually rotates relative to the second door body 32 and folds toward the inside of the second door body 32 until it is completely folded and protrudes above the first door frame 1. At this time, the folding door device is in a fully open state; when the folding door device is closed, the moving elements 42 move downward along the guide rails 41, and the first door body 31 drives the second door body 32 to rotate around the first door frame 1. The first door body 31 gradually rotates relative to the second door body 32 toward the inside of the second door body 32 until it is completely on the same horizontal plane with the second door body 32. At this time, the door is in a fully closed state.

[0081] In one embodiment, the guide assembly 4 further includes a connecting rod 43 , one end of the connecting rod 43 is connected to the moving element 42 , and the other end is fixed to the first door body 31 .

[0082] In this embodiment, one end of the connecting rod 43 is connected to the moving element 42 and the other end is fixed to the lower end of the first door body 31 . The connecting rod 43 makes the connection between the moving element 42 and the first door body 31 more stable.

[0083] In one embodiment, the guide rail 41 includes an anti-slip edge 411 , which is disposed at the top of the guide rail 41 and makes the width of the top of the guide rail 41 smaller than the width of the moving element 42 , thereby preventing the moving element 42 from slipping out.

[0084] By setting the anti-slip edge 411, the width of the top of the guide rail 41 is made smaller than the width of the moving element 42, thereby limiting the moving element 42 to move up and down along the guide rail 41, preventing the moving element 42 from escaping from the guide rail 41, and improving stability and safety.

[0085] In one embodiment, the guide rail 41 includes a through hole for the moving element 42 to be disengaged, and the through hole is disposed above the guide rail 41 .

[0086] In this embodiment, a through hole is provided above the interior of the guide rail 41. The through hole may be a square hole, a circular hole, or the like. The specific shape and size of the through hole are not limited, as long as the movable element 42 can be easily disengaged. When the folding door device is opened, the movable element 42 moves upward along the guide rail 41, and when it reaches the uppermost portion of the guide rail 41, it can disengage from the through hole, allowing the second door body 32 to open at a greater angle relative to the first door frame 1, or even fully open, facilitating access to the horizontal passage for maintenance.

[0087] In one embodiment, the moving element 42 is at least one of a slider, a pulley, and a rolling bearing.

[0088] In this embodiment, the moving element 42 is a slider, which can effectively reduce the friction with the slide rail and the noise when the folding door device is opened and closed. In other embodiments, the moving element 42 is a pulley or a rolling bearing, thereby further reducing the friction.

[0089] In one embodiment, the guide assembly 4 further includes a limiting member disposed on the guide rail 41 for limiting the position of the moving element 42 .

[0090] To prevent the first door body 31 from sliding downward after the first door body 31 and the second door body 32 are folded, a stopper is provided on the guide rail 41 to limit the position of the movable element 42. When the first door body 31 rotates a certain angle about the second hinge element 9, the stopper restricts the movement of the movable element 42, allowing the first door body 31 to remain at this angular position, thereby adjusting the rotation angle of the first door body 31 relative to the second door body 32. The stopper can be an elastic gasket, a limiting block, or other stop structure.

[0091] In one embodiment, the folding door device further includes a locking assembly 7 , which is disposed between the first door body 31 and the first door frame 1 and is used to lock the first door body 31 .

[0092] When the door assembly is closed, the first door 31 is locked by the locking assembly 7 to ensure the safety of the construction machine in the closed state and avoid accidents.

[0093] In an embodiment, the locking assembly 7 comprises a door lock 71 and a locking plate 72, the door lock 71 is arranged on the first door body 31, and the locking plate 72 is fixedly connected to the first door framework 1 and cooperates with the door lock 71 to lock the first door body 31.

[0094] In the embodiment, the door lock 71 comprises a retractable lock tongue, and the door lock 71 can be a common mechanical lock or an intelligent lock, the lock tongue of which can be elastically retracted, and the technical principle of the elastic retraction of the lock tongue and the specific structure for realizing the retraction are the common knowledge in the lock industry, which will not be described herein. The locking plate 72 is assembled on the first door framework 1 by bolts, and the locking plate 72 comprises a clamping groove which is inserted and cooperated with the lock tongue, the shape of the clamping groove is matched with the shape of the lock tongue. When the first door plate 31 is closed, the lock tongue is inserted into the clamping groove, and during the opening of the first door plate 31, the lock tongue is moved out of the clamping groove.

[0095] In an embodiment, the folding door device further comprises a handle 6 which is fixed to the first door body 31.

[0096] The handle 6 is arranged on the first door body 31 and can be operated by the worker, which improves the convenience of opening or closing the folding door device. The handle 6 can be arranged in a horizontal or vertical direction, or can be arranged obliquely, and the specific arrangement position and shape of the handle 6 are not limited, as long as the worker can pull the door body assembly conveniently. When the worker needs to enter the inside of the construction machinery, the worker can pull the first door body 31 through the handle 6, so that the door body assembly is automatically lifted and folded under the action of the elastic component 5, thereby opening a horizontal passage for the worker to enter or exit.

[0097] The utility model also provides another embodiment of a construction machinery, which comprises a rotating platform, a cab arranged on the rotating platform, and a folding door device for the construction machinery, the folding door device is arranged on the side of the cab and is threadedly connected to the rotating platform. Such a construction machinery greatly improves the convenience of operation, safety and construction efficiency.

[0098] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the appended claims.

Claims

1. A folding door device for construction machinery, characterized in that: include: a door frame, the door frame being used to connect to a turntable of a construction machine; At least one door body assembly (3a, 3b, 3c), the door body assembly (3a, 3b, 3c) comprising a first door body (31) and a second door body (32), the second door body (32) being connected to the door frame in a relatively rotatable manner, the upper end of the first door body (31) being connected to the second door body (32) in a relatively rotatable manner, and the lower end of the first door body (31) being movably assembled on the door frame; When the second door body (32) rotates relative to the door frame in a preset door opening direction, the lower end of the first door body (31) moves toward the door frame driven by the second door body (32), thereby opening the folding door device.

2. The folding door device for construction machinery according to claim 1, characterized in that: The door frame comprises a first door frame (1) and a second door frame (2); the second door body (32) is rotatably connected to the first door frame (1); and the lower end of the first door body (31) is movably assembled on the second door frame (2).

3. The folding door device for construction machinery according to claim 2, characterized in that: The folding door device further includes a guide assembly (4), which is assembled between the first door body (31) and the second door frame (2) and is used to guide the first door body (31) to move up and down along the second door frame (2) and to be in the same plane or folded with the second door body (32). After the first door body (31) and the second door body (32) are folded, they form a horizontal passage with the door frame for people to enter and exit.

4. The folding door device for construction machinery according to claim 2, characterized in that: The folding door device further includes a hinge assembly, and the hinge assembly includes: a first hinge element (8), disposed between the second door body (32) and the first door frame (1), and used for hinge-connecting the second door body (32) to the first door frame (1); The second hinge element (9) is arranged between the first door body (31) and the second door body (32) and is used to hinge the first door body (31) and the second door body (32).

5. The folding door device for construction machinery according to claim 2, characterized in that: The folding door device further comprises an elastic component (5), one end of the elastic component (5) being connected to the first door frame (1) and the other end being connected to the second door body (32), for providing buffering and support for the opening and closing of the folding door device.

6. The folding door device for construction machinery according to claim 3, characterized in that: The guide assembly (4) comprises: A guide rail (41), wherein the guide rail (41) is arranged on the second door frame (2); A moving element (42) is connected to the first door body (31) and is arranged in the guide rail (41) so as to be movable up and down, and is used to guide the first door body (31) and the second door body (32) to rotate relative to each other by moving up and down along the guide rail (41), thereby realizing opening and closing of the folding door device.

7. The folding door device for construction machinery according to claim 6, characterized in that: The guide rail (41) comprises an anti-slip edge (411), which is arranged at the top of the guide rail (41) and makes the width of the top of the guide rail (41) smaller than the width of the moving element (42), and is used to limit the moving element (42) from slipping out.

8. The folding door device for construction machinery according to claim 2, characterized in that: The folding door device further comprises a locking assembly (7), wherein the locking assembly (7) is arranged between the first door body (31) and the first door frame (1) and is used to lock the first door body (31).

9. The folding door device for construction machinery according to claim 1, characterized in that: The folding door device further comprises a handle (6), and the handle (6) is fixed on the first door body (31).

10. A construction machine, characterized in that: The invention comprises a turntable, a cab arranged on the turntable and a folding door device for a construction machine as claimed in any one of claims 1 to 9, wherein the folding door device is arranged on the side of the cab and is threadedly connected to the turntable.

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