Cab structure with ventilation system

Abstract

The invention discloses a cab structure with a ventilation system, and relates to the field of cabs. The ceiling is fixed at the top of the inner cavity of the cab main body; the main pipeline is arranged at the top of the ceiling, and one end extends into the ceiling; the main air opening is formed in the edge of the bottom of the ceiling and communicates with the main pipeline; the auxiliary pipeline is arranged at the top of the ceiling, and one end penetrates through the ceiling and is communicated with the interior of the cab; the main fan is mounted in the main pipeline; the main pipeline, the auxiliary pipeline and the main air opening communicated with the main pipeline are arranged, the main draught fan and the auxiliary draught fan are installed in the main pipeline and the auxiliary pipeline, when the draught fans work, active ventilation of the interior of the cab can be achieved, the main draught fan and the auxiliary draught fan can both rotate forwards and backwards, and different ventilation modes can be achieved.

Description

Technical Field

[0001] The invention relates to the field of driver cabs, in particular to a driver cab structure with a ventilation system. Background Art

[0002] The driver's cab is an important component in lifting machinery or transport machinery to ensure the driver's safe operation. It is widely used in various lifting and transport machinery such as container cranes, ship unloaders, tire port gantry cranes, floating cranes, shore-based container gantry cranes, ship loaders, metallurgical bridge cranes, general bridge cranes and tower cranes.

[0003] The driver's cab should be ventilated, warm and rainproof, and must have a good field of vision. In the absence of external obstacles, the driver should always be able to observe the movement of the lifting hook, lifting object and boom, and can easily observe the surrounding situation.

[0004] The existing driver's room ventilation mainly relies on windows, and ventilation can only be achieved when the windows are opened, and the ventilation effect is not good. Some driver's rooms are also equipped with skylights, which rely on skylights to achieve ventilation inside the driver's room. At that time, the above two ventilation structures rely on natural wind flow to achieve ventilation effects, and their ventilation effects are poor. Summary of the invention

[0005] The object of the present invention is to provide a driver's cab structure with a ventilation system to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a driver's cab structure with a ventilation system, comprising:

[0007] The main body of the driver's cab;

[0008] A ceiling, fixed to the top of the inner cavity of the main body of the cab;

[0009] The main pipe is arranged at the top of the ceiling, and one end of the main pipe extends to the inside of the ceiling;

[0010] The main air outlet is opened at the bottom edge of the ceiling and is connected to the main pipeline;

[0011] A secondary pipe is arranged on the top of the ceiling, one end of which passes through the ceiling and communicates with the interior of the driver's cab;

[0012] A main fan, installed inside the main duct;

[0013] The auxiliary fan is installed inside the auxiliary pipeline.

[0014] Preferably, the main pipeline and the auxiliary pipeline are both fixedly connected to the ceiling, and the other ends of the main pipeline and the auxiliary pipeline are connected to the external space of the driver's cab.

[0015] Preferably, a filter is placed inside one end of the main pipe and the auxiliary pipe that is connected to the external space of the driver's cab.

[0016] Preferably, the side wall of the driver's cab body extends upward along the ceiling to form a sliding cavity, and a plurality of evenly distributed support blocks are fixedly mounted on the top of the side wall;

[0017] A cover plate is installed in the sliding cavity, and the cover plate can slide up and down in the sliding cavity;

[0018] The upper sides of the main pipeline and the auxiliary pipeline are fixedly connected to the cover plate, and when the cover plate moves up and down, the main pipeline and the auxiliary pipeline can move up and down with it;

[0019] A corrugated pipe is connected between the main pipe and the auxiliary pipe and the ceiling;

[0020] A lifting device is arranged at the upper end of the ceiling to move the cover plate up and down.

[0021] Preferably, the lifting device comprises:

[0022] A motor, fixed on the upper end surface of the ceiling;

[0023] A lead screw, fixedly connected to an output end of the motor;

[0024] The threaded sleeve is fixed on the cover plate and penetrates the cover plate to be connected with the screw rod.

[0025] Preferably, when the cover plate is at the bottom, the edges of the cover plate are in contact with the inner wall of the sliding cavity, and the main pipeline and the auxiliary pipeline are located in the sliding cavity;

[0026] When the cover plate is located at the uppermost part, the cover plate contacts the support block, and the main pipeline and the auxiliary pipeline are located at the upper part of the sliding cavity.

[0027] Preferably, the main pipe and the auxiliary pipe are provided with a wind shield rotatably installed on the inner wall of one end of the filter, and the wind shield is inclined along the direction of the incoming air. The wind shield is located on the front side of the filter. When the air enters, the wind shield can rotate with the airflow to form an air inlet duct.

[0028] Preferably, an air outlet is provided on one side wall of one end of the main duct and the auxiliary duct where the filter is arranged, and an auxiliary air plate is rotatably installed at the air outlet, and the auxiliary air plate can be rotated outward to open the air outlet.

[0029] Preferably, the auxiliary wind plate is rotatably connected to the edge of the air outlet near the filter, and the side of the auxiliary wind plate near the wind shield is a movable end. When exhausting air, the side wall of the wind shield contacts the air inlet, blocking the air inlet, the auxiliary wind plate rotates outward, and the air outlet opens to exhaust air outward.

[0030] Preferably, a rotating shaft is fixedly mounted on one side of the wind shield and the auxiliary wind shield, and a torsion spring is mounted on the outer side of the rotating shaft to provide a torsional force to the wind shield and the auxiliary wind shield.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The present invention provides a main duct, a secondary duct, a main air outlet connected to the main duct, and installs a main fan and a secondary fan in the main duct and the secondary duct. When the fan is working, active ventilation of the interior of the driver's cab can be achieved, and both the main fan and the secondary fan can rotate forward and reverse, so different ventilation modes can be achieved.

[0033] When the main fan rotates forward or reverses, the main duct takes in air and the auxiliary duct exhausts air, and the wind inside the driver's cab flows from the edge to the center; when the main fan reverses or the auxiliary fan rotates forward, the auxiliary duct takes in air and the main duct exhausts air, and the wind inside the driver's cab flows from the center to the edge.

[0034] The main fan and the auxiliary fan of the main fan can also rotate forward and reverse at the same time. When rotating forward or reverse at the same time, the main duct and the auxiliary duct take in or exhaust air at the same time, and the exhaust volume is larger, which can adjust the ventilation effect inside the driver's cab according to different situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural diagram of the present invention as a whole;

[0036] Figure 2 It is a structural diagram of the ceiling, main pipeline and auxiliary pipeline of the present invention;

[0037] Figure 3 This is a structural diagram of the present invention in which air flows from the edge to the center;

[0038] Figure 4 This is a structural diagram of the present invention in which air flows from the center to the edge;

[0039] Figure 5 It is a cross-sectional view of the filter screen, wind shield and auxiliary wind plate of the present invention in a top view;

[0040] Figure 6 It is a structural diagram of the filter screen, wind shield and auxiliary wind plate of the present invention;

[0041] Figure 7 This is the air intake state diagram of the present invention;

[0042] Figure 8 It is the exhaust state diagram of the present invention;

[0043] Fig. 9 It is a structural diagram of the cover plate, ceiling, main pipeline and auxiliary pipeline of the present invention;

[0044] Fig.10 It is a cross-sectional view of the main pipeline and the auxiliary pipeline of the present invention located in the sliding cavity;

[0045] Fig.11This is a cross-sectional view of the main pipe and the auxiliary pipe of the present invention moving to the outside of the sliding cavity.

[0046] In the figure: 1. Driver's cab main body; 2. Support block; 3. Ceiling; 4. Main duct; 5. Main fan; 6. Auxiliary duct; 7. Auxiliary fan; 8. Filter; 9. Main air outlet; 10. Cover plate; 11. Bellows; 12. Lifting device; 13. Auxiliary wind plate; 14. Wind shield; 15. Air outlet. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] Please refer to the figure, this embodiment provides a driver's cab structure with a ventilation system, such as Figure 1-11 As shown, including:

[0049] The driver's cab main body 1 is made of metal steel plates, and is provided with windows on the front and left and right sides thereof, and the windows are sealed with glass. In order to expand the user's field of vision, a downwardly inclined window is provided on the front side of the driver's cab main body 1, and glass is installed at the window, so that the driver and the user can look down at the cargo situation or the hoisting situation to expand the field of vision. The glass can also be rotated outward so that the window can be opened to allow air to enter the driver's cab. A support block 2 is fixedly installed on the top of the driver's cab main body 1, and the support block 2 can realize the hoisting and installation of the driver's cab, which is the prior art; a steel plate is welded to the bottom of the driver's cab main body 1 to form the bottom plate of the driver's cab main body 1, and the bottom plate is used to install seats and operating handles, etc., which is the prior art.

[0050] The ceiling 3 is welded and fixed to the top of the inner cavity of the driver's cab main body 1 to form an upper cover of the driver's cab main body 1.

[0051] The main duct 4 is fixed to the upper end surface of the ceiling 3, and one end of the main duct 4 extends to the interior of the ceiling 3. Figure 1-Figure 4As shown, a plurality of main air vents 9 are provided at the bottom edge of the ceiling 3, and the main air vents 9 are evenly arranged on the bottom surface of the ceiling 3. A ventilation pipe is installed inside the ceiling 3, and the ventilation pipe connects the main air duct 4 with the main air vents 9. Alternatively, the ceiling 3 is provided with a cavity structure, one end of the main air duct 4 extends into the cavity, the main air vents 9 connect the cavity, and the cavity connects the main air duct 4 with the main air vents 9. In this embodiment, the main duct 4 is located in the middle of the ceiling 3 as much as possible, and the distance from the main duct 4 to the main air vents 9 is kept the same as much as possible to ensure the uniformity of ventilation. For example: when a pipeline is used to connect the main air duct 4 and the main air vents 9, the length of the pipeline is at least the maximum distance between the main air duct 4 and the main air vents 9, the pipeline can be laid in a curved manner, and the pipeline length is the same, which can ensure that the wind resistance of the pipeline is similar, and when the main air vent 9 is ventilated, it will be more uniform.

[0052] The main fan 5 is installed inside the main pipeline 4. The motor of the main fan 5 is fixedly connected to the main pipeline 4, and the fan blades of the main fan are fixedly connected to the output shaft of the motor for rotating with the blades.

[0053] The auxiliary pipe 6 is fixed on the top of the ceiling 3. One end of the auxiliary pipe 6 passes through the ceiling 3 and communicates with the interior of the driver's cab. The through-portion is located at the center of the ceiling 3. Figure 1-Figure 4 As shown, an auxiliary fan 7 is installed inside the auxiliary pipe 6, the motor of the auxiliary fan 7 is fixedly connected to the auxiliary pipe 6, and the blades of the auxiliary fan are fixedly connected to the output shaft of the motor for driving the blades to rotate.

[0054] In the middle of this embodiment, the main fan 5 and the auxiliary fan 7 are both forward and reverse axial flow fans, and the axial flow fans can rotate forward and reverse.

[0055] In addition, the other ends of the main pipe 4 and the auxiliary pipe 6 are connected to the external space of the driver's cab. A filter 8 is placed inside the end of the main pipe 4 and the auxiliary pipe 6 that are connected to the outside of the driver's cab. When the external air enters the driver's cab from the main pipe 4 and the auxiliary pipe 6, the filter 8 can block the dust in the air. It is specially designed for the high dust environment of the crane. The environment in which the crane is used is mostly dusty, such as ports, construction sites, and large workpiece processing plants, and cranes are required to lift objects of relatively large weight. After the filter has been used for a period of time, too much dust will adhere to it, causing blockage of the filter 8, and the filter 8 will lose its filtering function, and the filter 8 needs to be disassembled and replaced.

[0056] In a further embodiment, Figure 5-Figure 8As shown, a windshield 14 is rotatably mounted on the inner wall of one end of the main duct 4 and the auxiliary duct 6 where the filter screen 8 is provided, and the windshield 14 is inclined along the direction of the incoming air. And along the direction of the incoming air, the windshield 14 is located in front of the filter screen 8. A rotating shaft is fixedly mounted on the side wall of the windshield 14 away from the filter screen 8, and the rotating shaft is rotatably connected to the main duct 4 and / or the auxiliary duct 6. A torsion spring is installed on the outer side of the rotating shaft, and the torsion spring provides a torsional force to the windshield 14 so that the windshield 14 can fit together with the main duct 4 and / or the auxiliary duct 6. When the air is introduced, the windshield 14 can rotate with the airflow to form an air inlet, and the end of the main duct 4 and / or the auxiliary duct 6 where the filter screen 8 is provided is opened for air intake, as shown in FIG. Figure 6 shown.

[0057] An air outlet 15 is provided on one side wall of one end of the main duct 4 and / or the auxiliary duct 6 where the filter screen 8 is provided. A secondary air plate 13 is rotatably installed at the air outlet 15. The secondary air plate 13 is located on the outside of the main duct 4 and / or the auxiliary duct 6. Figure 5-Figure 8 The auxiliary air plate 13 can be rotated outwards so that the air outlet 15 is opened to exhaust air outwards. Figure 6 As shown, the auxiliary wind plate 13 is rotatably connected to the edge of the air outlet 15 near the filter screen 8, and the side of the auxiliary wind plate 13 near the wind shield 14 is a movable end. When exhausting air, the side wall of the wind shield 14 contacts the air inlet duct to block the air inlet duct. The auxiliary wind plate 13 rotates outward under the pressure of the wind, and the air outlet 15 opens to exhaust air outward. Figure 8 As shown, one side edge of the air outlet 15 is preferably close enough to the rotating part of the wind shield 14. When the auxiliary air plate 13 is opened to the outside and the air outlet 15 is exhausted, the flowing air flow can flow along the wind shield 14 and be exhausted from the air outlet 15, which can ensure that the exhausted wind is relatively smooth, avoid or reduce the vortex effect caused by the main duct 4 and / or the auxiliary duct 6 hindering the air flow. In particular, when exhausting air to the outside, the wind passes through the filter 8 to blow back the filter 8, and the exhausted wind will take away the dust particles on the filter 8, avoiding the accumulation of dust particles on the main duct 4 and / or the auxiliary duct 6 caused by the vortex effect. In this embodiment, a rotating shaft is fixedly installed on one side of the auxiliary air plate 13 and the air outlet 15, and a torsion spring is installed on the outside of the rotating shaft. The torsion spring provides a torsional force to the auxiliary air plate 13 so that the auxiliary air plate 13 and the air outlet 15 remain in contact. When the air is entering, the air outlet 15 will not enter. A rubber ring is provided between the auxiliary air plate 13 and the air outlet 15 to fill the gap therebetween to ensure that no air leakage occurs.

[0058] In this embodiment, the main duct 4 and the auxiliary duct 6 have different functions for different usage conditions. When used in an environment with relatively small dust at a temperature of 15-25 degrees Celsius (such as spring or autumn), the main duct 4 and the auxiliary duct 6 can be used to intake or exhaust air at the same time, and the windows of the driver's cab are in an open state. When the air is intaken, the main fan 5 and the auxiliary fan 7 rotate forward. When the main duct 4 and the auxiliary duct 6 are intaked at the same time, they are both air intake pipes. The air enters the driver's cab through the filter 8, and the open windows exhaust air to the outside. When the main duct 4 and the auxiliary duct 6 are intaked at the same time, the windows may not be opened. Since the driver's cab is not a sealed structure, there are gaps at the positions of the windows and doors, and air can circulate through the gaps. After the air enters the interior of the driver's cab, it will also maintain air pressure balance with the outside.

[0059] When exhausting, the windows of the driver's room are also in an open state, the main fan 5 and the auxiliary fan 7 are reversed, the main duct 4 and the auxiliary duct 6 exhaust air to the outside at the same time, and the windows let air in. The above contents are all for the case where there is relatively little dust in the air. There is basically no dust in the air, and the dust on the filter 8 is also relatively small and can be ignored.

[0060] For environments with a temperature of 15-25 degrees Celsius (such as spring or autumn) and high dust content, the following usage conditions apply:

[0061] 1. The main fan 5 and the auxiliary fan 7 rotate forward at the same time, the main duct 4 and the auxiliary duct 6 take in air at the same time, and the windows of the main body of the driver's cab are in a closed state. Since the driver's cab is not a sealed structure, there are gaps at the positions of the windows and doors, and air can circulate through the gaps. After the air enters the interior of the driver's cab, it will also maintain air pressure balance with the outside world, and can continuously take in air to achieve ventilation inside the driver's cab.

[0062] Second: The main fan 5 rotates forward, the main duct 4 takes in air, the auxiliary fan 7 rotates backward, and the auxiliary duct 6 exhausts air. Figure 3 As shown, the wind from the main duct 4 enters the driver's cab from the main air outlet 9 and is discharged from the auxiliary duct 6. The gas inside the driver's cab flows from the edge of the driver's cab to the center, as shown in FIG. Figure 3 As shown by the middle arrow, the air can be better circulated, so that the gas is concentrated in the center, the ventilation effect is better, and there is no dead angle. In particular, the main pipeline 4 supplies air at positive pressure and the auxiliary pipeline 6 exhausts air at negative pressure. The combination of positive and negative pressure can improve the ventilation effect inside the driver's room.

[0063] 3: The main fan 5 rotates in reverse, the main duct 4 exhausts air, the auxiliary fan 7 rotates in forward direction, and the auxiliary duct 6 takes in air. Figure 4As shown, the external wind enters the driver's room from the auxiliary air duct 6, and the air in the driver's room enters the main duct 4 from the main air port 9 and is discharged to the outside. The gas inside the driver's room flows from the center to the edge of the driver's room, and the gas flows from the center to the surroundings, which can make the air circulate better and the ventilation effect better without dead corners. In particular, the exhaust of the main duct 4 is a secondary pressure, and the air intake of the auxiliary duct 6 is a positive pressure. The combination of positive and negative pressure can improve the ventilation effect inside the driver's room.

[0064] In this embodiment, since the internal space of the driver's cab is relatively small and has a closed structure, the air inside is relatively clean and dusty, and when the main duct 4 or the auxiliary duct 6 is exhausting air, basically no dust will stick to the filter 8.

[0065] When the main duct 4 or the auxiliary duct 6 takes in air, the dust on the air will be blocked by the filter 8 after the air passes through the filter 8, and the air enters the driver's cab, ensuring that the air entering the driver's cab is relatively clean. When the air is taken in, the dust will gather on the side of the filter 8 close to the outside. When the filter 8 needs to be cleaned, or in order to extend the service life of the filter 8, the replacement frequency of the filter 8 can be reduced. The air intake and exhaust of the main duct 4 and the auxiliary duct 6 can be used alternately, that is: when the main duct 4 takes in air, the auxiliary duct 6 exhausts air, and when the auxiliary duct 6 takes in air, the main duct 4 exhausts air. Figure 8 As shown, when the main duct 4 or the auxiliary duct 6 is exhausting air, the wind shield 14 blocks the air inlet of the main duct 4 or the auxiliary duct 6, and the auxiliary wind plate 13 rotates outward under the action of the airflow, and the air outlet 15 is in an open state. After the airflow flows through the filter 8, the filter 8 is backblown, and the dust on the outside of the filter 8 is carried away by the airflow and discharged from the air outlet 15. The air with dust will flow through the back side of the wind shield 14 and the auxiliary wind plate 13 to prevent the air from carrying dust into the air inlet, which can reduce the accumulation and adhesion of dust in the air inlet. While ensuring that the filter 8 is backblown and cleaned, the dust backblown from the air inlet can also be prevented from entering the air inlet. When the air inlet is opened, the external air directly flows through the filter 8 to prevent the dust carried away by the backblowing from entering the filter 8 again. When the wind shield 14 rotates and the air inlet is opened, there is a windless area between the wind shield 14 and the auxiliary wind plate 13. The windless area is similar to a triangular structure, such as Figure 7 As shown in a, the airflow in the air inlet duct will not pass through the triangular space formed between the wind shield 14 and the auxiliary wind plate 13. Even if a small amount of dust adheres to the back side of the wind shield 14 and the auxiliary wind plate 13, the dust will not follow the airflow and enter the filter 8 again when the air enters.

[0066] In a further embodiment, the difference from the above embodiment is that:

[0067] like Fig. 9As shown, the side walls of the driver's cab body 1 extend upward along the ceiling 3 to form a sliding cavity, and a plurality of evenly distributed support blocks 2 are fixedly installed on the top of the side wall, and a cover plate 10 is installed in the sliding cavity. The edge of the cover plate 10 is in contact with the inner side wall of the sliding cavity, and the cover plate 10 can slide up and down in the sliding cavity.

[0068] The upper side surfaces of the main pipe 4 and the auxiliary pipe 6 are fixedly welded to the cover plate 10. One end of the main pipe 4 and the auxiliary pipe 6 where the filter screen 8 is set does not contact the inner wall of the sliding cavity, leaving space for ventilation.

[0069] A bellows 11 is connected between the main pipe 4 and the auxiliary pipe 6 and the ceiling 3. When the main pipe 4 and the auxiliary pipe 6 move upward with the cover plate 10, the bellows 11 extends;

[0070] The upper end of the ceiling 3 is provided with a lifting device 12 to move the cover plate 10 up and down. The lifting device 12 is preferably a screw lifting device, which includes a motor fixed to the upper end surface of the ceiling 3; a screw fixedly connected to the output end of the motor; and a threaded sleeve fixed to the cover plate 10 and passing through the cover plate 10 to be connected to the screw. When the motor rotates, it rotates with the screw, and the screw rotates, and the cover plate 10 moves up and down in the sliding cavity. When the cover plate 10 moves up and down, it can move the main pipe 4 and the auxiliary pipe 6 up and down.

[0071] like Fig.10 and Fig.11 As shown, when the cover plate 10 is at the bottom, the edges of the cover plate 10 are in contact with the inner wall of the sliding cavity, and the main pipe 4 and the auxiliary pipe 6 are located in the sliding cavity; when the cover plate 10 is at the top, the cover plate 10 is in contact with the support block 2, and the main pipe 4 and the auxiliary pipe 6 are located at the upper part of the sliding cavity.

[0072] In this embodiment, the cover plate 10 is provided mainly to consider the sound insulation problem of the driver's cab. Since the main pipe 4 and the auxiliary pipe 6 are installed on the ceiling 3, the interior of the driver's cab is directly connected to the outside through the main pipe 4 and the auxiliary pipe 6, and the noise will pass through the main pipe 4 and the auxiliary pipe 6, and its sound insulation effect is greatly reduced. The cover plate 10 is located in the sliding cavity, and the edges of the cover plate 10 are in contact with the inner wall of the sliding cavity. The main pipe 4 and the auxiliary pipe 6 are located in the sliding cavity and the top opening of the sliding cavity is blocked. When facing a noisy environment, the cover plate 10 closes the top of the sliding cavity, which can isolate external noise and provide sound insulation. At the same time, the windows of the driver's cab are also closed. When in use, the main pipe 4 and the auxiliary pipe 6 are not connected to the outside of the driver's cab, and the sliding cavity serves as a space for air circulation and exchange. One of the main pipe 4 and the auxiliary pipe 6 supplies air, and the other exhausts air. Take the main duct 4 for air supply and the auxiliary duct 6 for air exhaust as an example: the main fan 5 of the main duct 4 rotates forward, and the air in the sliding cavity enters the driver's cab from the main air port 9. The auxiliary fan 7 in the auxiliary duct 6 rotates reversely, and the air enters the auxiliary duct 6 and is discharged into the sliding cavity. The air in the driver's cab is discharged into the sliding cavity and circulates in the sliding cavity to enter the driver's cab. The airflow in the driver's cab circulates along a fixed path in the sliding cavity and the driver's cab, and the circulation effect is better. In this embodiment, when the auxiliary duct 6 is exhausting air, even if dust is blown off the filter screen 8 of the auxiliary duct 6, it will fall into the inside of the sliding cavity and will not fall directly into the driver's cab, which can ensure the cleanliness of the air circulation in the driver's cab and remove dust from the air in the driver's cab. When the air is entering, the filter screen 8 of the main duct 4 will intercept the dust, so it can be seen that the dust in the sliding cavity will not enter the driver's cab.

[0073] For occasions with relatively low noise, the cover plate 10 moves upward to the extreme position and extends out from the sliding cavity. The corners of the cover plate 10 contact the support block 2. The support block 2 limits the cover plate 10 to prevent it from falling off. The main pipe 4 and the auxiliary pipe 6 also move upward from the sliding cavity and are located at the upper part of the sliding cavity to communicate with the external air.

[0074] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A driver's cab structure with a ventilation system, characterized in that: include: Driver's cab main body (1); A ceiling (3) is fixed to the top of the inner cavity of the driver's cab body (1); A main pipe (4) is arranged on the top of the ceiling (3), with one end extending into the interior of the ceiling (3); A main air outlet (9) is provided at the bottom edge of the ceiling (3) and is connected to the main duct (4); A secondary pipe (6) is arranged on the top of the ceiling (3), one end of which passes through the ceiling (3) and is connected to the interior of the driver's cab; A main fan (5) installed inside the main pipeline (4); The auxiliary fan (7) is installed inside the auxiliary pipeline (6).

2. The driver's cab structure with a ventilation system according to claim 1, characterized in that: The main pipeline (4) and the auxiliary pipeline (6) are both fixedly connected to the ceiling (3), and the other ends of the main pipeline (4) and the auxiliary pipeline (6) are in communication with the external space of the driver's cab.

3. The driver's cab structure with a ventilation system according to claim 2, characterized in that: A filter screen (8) is placed inside one end of the main pipe (4) and the auxiliary pipe (6) that are in communication with the external space of the driver's cab.

4. The driver's cab structure with a ventilation system according to claim 2, characterized in that: The side wall of the driver's cab main body (1) extends upward along the ceiling (3) to form a sliding cavity, and a plurality of evenly distributed support blocks (2) are fixedly mounted on the top of the side wall; A cover plate (10) is installed in the sliding cavity, and the cover plate (10) can slide up and down in the sliding cavity; The upper side surfaces of the main pipeline (4) and the auxiliary pipeline (6) are fixedly connected to the cover plate (10), and when the cover plate (10) moves up and down, it can move the main pipeline (4) and the auxiliary pipeline (6) up and down; A corrugated pipe (11) is connected between the main pipe (4) and the auxiliary pipe (6) and the ceiling (3); A lifting device (12) is provided at the upper end of the ceiling (3) to move the cover plate (10) up and down.

5. The driver's cab structure with a ventilation system according to claim 4, characterized in that: The lifting device (12) comprises: A motor, fixed on the upper end surface of the ceiling (3); A lead screw, fixedly connected to an output end of the motor; The threaded sleeve is fixed on the cover plate (10) and penetrates the cover plate (10) to be connected with the screw rod.

6. The driver's cab structure with a ventilation system according to claim 5, characterized in that: When the cover plate (10) is located at the bottom, the edges of the cover plate (10) are in contact with the inner wall of the sliding cavity, and the main pipe (4) and the auxiliary pipe (6) are located in the sliding cavity; When the cover plate (10) is located at the uppermost part, the cover plate (10) contacts the support block (2), and the main pipeline (4) and the auxiliary pipeline (6) are located at the upper part of the sliding cavity.

7. The driver's cab structure with a ventilation system according to claim 2, characterized in that: A windshield (14) is rotatably mounted on the inner side wall of one end of the main duct (4) and the auxiliary duct (6) where the filter screen (8) is arranged. The windshield (14) is inclined along the direction of air intake. The windshield (14) is located in front of the filter screen (8). When air is intaken, the windshield (14) can rotate along with the airflow to form an air intake duct.

8. A driver's cab structure with a ventilation system according to claim 7, characterized in that: An air outlet (15) is provided on one side wall of one end of the main pipe (4) and the auxiliary pipe (6) where the filter screen (8) is arranged. A secondary air plate (13) is rotatably mounted at the air outlet (15). The secondary air plate (13) can be rotated outward to open the air outlet (15).

9. A driver's cab structure with a ventilation system according to claim 8, characterized in that: The auxiliary wind plate (13) is rotatably connected to the edge of the air outlet (15) near the filter screen (8), and the side of the auxiliary wind plate (13) near the wind shield plate (14) is a movable end. When exhausting air, the side wall of the wind shield plate (14) contacts the air inlet duct to block the air inlet duct, and the auxiliary wind plate (13) rotates outward, and the air outlet (15) opens to exhaust air outward.

10. A driver's cab structure with a ventilation system according to claim 8 or 9, characterized in that: A rotating shaft is fixedly mounted on one side of the wind shield (14) and the auxiliary wind shield (13), and a torsion spring is mounted on the outer side of the rotating shaft to provide a torsional force to the wind shield (14) and the auxiliary wind shield (13).

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