Crawler tractor cab with transition air duct

Abstract

The application provides a bulldozer cab with a transition air duct, comprising: a cab body; an air outlet body, comprising: an air bellow mounted on the cab body through a damping member; an air inlet channel provided on the air bellow, with an output end communicated with a top wall of the air bellow and an input end used for connecting an air pre-filter; an air outlet channel penetrating through a bottom wall of the air bellow, with an output end used for connecting an air filter of an engine and an input end spaced from the top wall of the air bellow; a flow guide assembly provided inside the air bellow, used for guiding air flow from the air inlet channel to the air outlet channel and making the air flow form at least one direction change in a flow path, so that particulate matters in the air flow are separated multiple times under the action of inertial force; and a dust discharge channel with an input end communicated with the bottom wall of the air bellow and an output end extended to outside of the air bellow, used for collecting and discharging the separated particulate matters.

Description

Technical Field

[0001] This utility model relates to the technical field, and in particular to a bulldozer hood with a transition air duct. Background Technology

[0002] The desert environment contains a large amount of dust and sand, and there are occasional particulate matter weather conditions, which places extremely high demands on the dustproof and ventilation performance of bulldozer covers.

[0003] Currently, conventional bulldozer covers are mostly designed for ordinary working conditions. In desert environments, the air box structure is unreasonable. The air box is a welded box structure without a dust exhaust port, and dust and sand particles accumulate inside and cannot be discharged. There is a lack of effective air intake system airflow design, or the use of a multi-stage series intake system, which seriously affects the overall vehicle power and reduces working efficiency. If a single-stage intake system is used, the air filter is prone to clogging in a short time, which greatly shortens the life of the air filter element. If particulate matter directly enters the engine, it can easily cause serious failures such as premature wear and cylinder scoring of the engine. Utility Model Content

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a bulldozer hood with a transition air duct, comprising:

[0005] hood body;

[0006] The air outlet includes:

[0007] The bellows is mounted on the main body of the machine casing via shock-absorbing components.

[0008] The air inlet duct is located on the air box, with its output end connected to the top wall of the air box and its input end used to connect to the air pre-filter.

[0009] The air outlet duct runs through the bottom wall of the air box; its output end is used to connect to the engine air filter, and its input end is spaced apart from the top wall of the air box.

[0010] The airflow guiding component, located inside the air box, is used to guide the airflow from the air inlet channel to the air outlet channel and cause the airflow to change direction at least once in the flow path, so that the particulate matter in the airflow is separated multiple times under the action of inertial force.

[0011] The dust discharge channel has its inlet end connected to the bottom wall of the air box and its outlet end extended to the outside of the air box, used to collect and discharge separated particulate matter.

[0012] In some embodiments of this application, the flow guiding component includes a flow guiding plate, the upper and lower ends of which are respectively connected to the top and bottom walls of the inner cavity of the wind box, and the left and right ends are respectively connected to the left wall of the inner cavity of the wind box and the outer peripheral wall of the air outlet channel.

[0013] The air intake plate, the front wall of the air box, and the right wall together form an air duct, with the output end of the air inlet facing the air duct. The tail side of the air intake plate connects to the air outlet duct.

[0014] In some embodiments of this application, a portion of the air duct inlet has a tapering trend.

[0015] In some embodiments of this application, the flow guiding assembly further includes a guide plate, which is obliquely disposed at the rear side of the dust exhaust channel inlet. The front end and rear end of the guide plate are respectively connected to the bottom wall and rear wall of the air box, and the left end and right end are respectively connected to the outer peripheral wall of the air outlet channel inlet and the right wall of the air box.

[0016] In some embodiments of this application, the rear part of the upper end face of the air outlet duct is a forward-sloping slope, and the front part is a flat surface, with the flat surface positioned higher than the bottom surface of the air box cavity. A portion of the left side of the guide plate connects with the edge of the slope.

[0017] In some embodiments of this application, the air inlet channel is provided with multiple guide vanes, which are arranged in a spiral shape.

[0018] This invention offers the following advantages: Through the design of the airflow guide component, the airflow forms a rotating airflow within the flow path and undergoes at least one directional change. This causes particles in the rotating airflow to repeatedly impact the inner wall of the airbox or the guide surface under centrifugal and inertial forces, achieving efficient separation. This reduces the amount of dust entering the engine, preventing premature engine wear or air filter clogging, and extending engine lifespan. It is particularly suitable for bulldozer operations in dusty environments. The dust discharge channel is directly connected to the bottom wall of the airbox, continuously collecting and discharging separated particles, preventing particle accumulation and blockage of the air duct, ensuring unobstructed airflow, reducing manual cleaning frequency, and improving system reliability. The airbox is mounted on the engine hood body 1 via shock absorbers, effectively isolating the engine and vibrations generated during operation, preventing vibration transmission to the engine hood and air duct system, reducing component fatigue damage, and improving the overall structural stability and durability. The air intake duct connects to the air pre-filter, and the air outlet duct connects to the engine's air filter, forming a complete transition air duct system. The layout is reasonable and easy to integrate into the existing bulldozer design without major changes to the hood structure, which reduces manufacturing costs and installation complexity, thereby achieving efficient and passive dust removal of the intake air. Attached Figure Description

[0019] Figure 1 This is a partial structural diagram of the connection between the bulldozer hood and the bellows provided in an embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the structure of the bellows provided in an embodiment of this application;

[0021] Figure 3 for Figure 2 Exploded view;

[0022] Figure 4 This is an exploded view of the shock absorber provided in the embodiments of this application.

[0023] Figure label:

[0024] 100. Air pre-filter; 200. Engine;

[0025] 1. Hood body;

[0026] 2. Air outlet; 21. Air inlet channel; 211. Flow deflector; 22. Air outlet channel; 23. Flow deflector assembly; 231. Flow guide plate; 232. Guide plate; 24. Dust exhaust channel; 241. Automatic valve; 25. Air box

[0027] 3. Shock-absorbing components; 31. Shock-absorbing plugs; 32. Fastening seats;

[0028] s1, air duct; s2, negative pressure space. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

[0030] In the description of this utility model, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of this utility model. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the protection scope of this utility model.

[0031] This application provides a bulldozer hood with a transition air duct. Please refer to [link / reference]. Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a partial structural diagram showing the connection between the hood body 1 and the air box 25 provided in an embodiment of this application. Figure 2 This is a schematic diagram of the structure of the bellows 25 provided in the embodiments of this application. Figure 3 for Figure 2 The exploded view shows the bulldozer hood, which includes the hood body 1 and the air outlet 2. The air outlet 2 includes: a bellows 25, an air inlet channel 21, an air outlet channel 22, a flow guide assembly 23, and a dust exhaust channel 24.

[0032] The bellows 25 is mounted on the shroud body 1 via the shock absorber 3. For details, please refer to [link / reference needed]. Figure 4Combined Figure 3 , Figure 4 The exploded view shows the shock absorber 3 provided in this embodiment. The shock absorber 3 may include a shock absorber plug 31 and a fastening seat 32. The air box 25 is connected to the hood body 1 through the shock absorber plug 31. Specifically, multiple lugs (e.g., L-shaped lugs) may be installed on the outer wall of the air box 25. Multiple mounting holes are provided on the upper wall of the hood body 1. The holes on the lugs correspond one-to-one with the mounting holes. The shock absorber 3 passes through the holes on the lugs and the mounting holes, and is connected to the bottom of the shock absorber plug 31 through the fastening seat 32.

[0033] In some examples, the shock absorber 3 can be made of rubber. Rubber is a viscoelastic material. When subjected to external vibrations (such as severe, high-frequency vibrations generated by the engine 200 and track movement), its internal molecular chains undergo reversible stretching and bending, converting mechanical kinetic energy into a small amount of heat energy and dissipating it. The rubber material can effectively isolate the vibration transmitted from the engine cover 1 to the air box 25. This not only protects the structure of the air box 25 itself, but more importantly, ensures the stability of the precision airflow channels such as the internal guide plate 231 and guide plate 211 of the air box 25. It avoids cracking of weld points, loosening of connectors, or deformation of the air box 25 structure caused by long-term severe vibration, maintaining long-term and stable dust removal efficiency.

[0034] Furthermore, rubber possesses high elasticity, enabling it to withstand significant deformation and recover after the removal of external force. When the bulldozer experiences impact loads, such as the violent shaking during rough terrain or bucket operation, the rubber shock absorber 3 can absorb this impact energy through its own compression and deformation. This provides a flexible support for the entire bellows 25 system, greatly buffering the direct damage of impact forces to the bellows 25 and its internal structure, improving the reliability and durability of the connection between the bellows 25 and the hood body 1, and reducing the risk of sudden failures due to impacts.

[0035] Furthermore, the area where the shock absorber 31 connects with the air box 25 and the main body 1 gradually decreases from top to bottom.

[0036] In this way, when the bellows 25 is assembled onto the shroud, the holes on the lugs may not be perfectly aligned with the mounting holes on the shroud. A tapered design allows the smaller diameter of the lower end of the shock absorber 31 to be inserted into both the lug and the mounting hole on the shroud. As the shock absorber 31 is pressed down, the larger diameter of the shock absorber 31 gradually connects the lug and the mounting hole on the shroud. During this process, the holes on the lug and the mounting hole on the shroud gradually align as the diameter of the shock absorber 31 increases. This tapered design effectively adjusts assembly errors, achieving fault-tolerant assembly and improving assembly efficiency. Because rubber is elastic, this tapered slope corrects minute positional deviations from different directions through flexible deformation, forcing the bellows 25 to move to the correct position, making the assembly process smooth and adaptive. When the bellows 25 is fully installed, the outer peripheral wall of the larger diameter of the upper part of the shock absorber 31 fits tightly against the cover and the ear seat. Under this connection method, the support force and friction provided by the shock absorber 31 are also maximized, ensuring the tightness of the connection.

[0037] Meanwhile, the tapered design of the shock absorber plug 21 ensures that vibration stress is evenly distributed along the plug body, avoiding stress concentration that could lead to early cracking or deformation, and enhancing the fatigue strength and service life of the shock absorber 3. Enhanced damping performance: The tapered structure allows the shock absorber plug 31 to undergo greater elastic deformation during compression and rebound, improving vibration absorption efficiency and further reducing the vibration amplitude transmitted to the housing body 1. Installation sealing and adaptability: The tapered shape easily mates with the connecting holes, forming a tight fit, preventing dust and moisture intrusion, improving environmental sealing, and adapting to different hole diameter requirements.

[0038] Please return to the reference. Figure 2 and Figure 3 The air inlet duct 21 is arranged along the height direction of the air box 25, and has an input end and an output end. The upper end of the air inlet duct 21 is the input end, and the lower end of the air inlet duct 21 is the output end. The air inlet duct 21 is located on the air box 25, and its output end is connected to the top wall of the air box 25, while the input end is connected to the air pre-filter 100.

[0039] The air outlet duct 22 is arranged along the height of the air box 25, and has an input end and an output end. The upper end of the air outlet duct 22 is the input end, and the lower end of the air outlet duct 22 is the output end. The air outlet duct 22 penetrates the bottom wall of the air box 25. The output end of the air outlet duct 22 is connected to the air filter of the engine 200. The air filter of the engine 200 is a mature existing technology and will not be described in detail here. The input end is spaced apart from the top wall of the air box 25.

[0040] The airflow guide assembly 23, located inside the air box 25, is used to guide the airflow from the air inlet channel 21 to the air outlet channel 22, and to cause the airflow to change direction at least once in the flow path, so that the particulate matter in the airflow is separated multiple times under the action of inertia.

[0041] The dust discharge channel 24 is located outside the air box 25. Its input end is connected to the bottom wall of the air box 25, and its output end extends to the outside of the air box 25. The input end of the dust discharge channel 24 is located between the air outlet channel 22 and the right wall of the air box 25, and is used to collect and discharge the separated particulate matter.

[0042] In some embodiments, an automatic valve 241 is provided at the bottom of the dust discharge channel 24. For example, the automatic valve 241 can be a gravity flap valve, which, when closed, isolates the interior of the air box 25 from the external environment. When the accumulated particles reach a certain weight, they will open the valve and automatically discharge. The gravity flap valve closes by its own weight after the particles are discharged, effectively preventing dust-laden air from flowing back into the air box 25 through the dust discharge channel 24 during non-dust discharge times, thus maintaining the airtightness and effectiveness of the dust removal system. Simultaneously, it also automates and intelligently manages maintenance, eliminating the need for manual dust removal, reducing the maintenance burden, and ensuring the long-term reliability of the air duct operation.

[0043] Of course, in other embodiments, the automatic valve 241 can also be an electrically controlled valve, which can be opened at a time.

[0044] The embodiments of this utility model, through the design of the airflow guide component 23, ensure that the airflow undergoes at least one directional change in its flow path. This causes particles in the airflow to repeatedly impact the inner wall of the air box or the guide surface under inertia, thereby achieving efficient separation. This reduces the dust content entering the air filter of the engine 200, preventing premature engine wear or air filter clogging, and extending engine life. It is particularly suitable for bulldozer operating environments with high dust levels. The dust discharge channel 24 is directly connected to the bottom wall of the air box 25, enabling continuous collection and discharge of separated particles. This prevents particles from accumulating inside the air box 25 and clogging the air duct, ensuring unobstructed airflow, reducing the frequency of manual cleaning, and improving system reliability. The air box 25 is mounted on the engine hood body 1 via shock absorbers 3, effectively isolating the engine and vibrations generated during operation. This prevents vibration from being transmitted to the engine hood and air duct system, reducing component fatigue damage and improving the overall structural stability and durability. The air intake duct 21 connects to the air pre-filter 100, and the air outlet duct 22 connects to the air filter of the engine 200, forming a complete transition air duct system. The layout is reasonable and easy to integrate into the existing bulldozer design without major changes to the hood structure, which reduces manufacturing costs and installation complexity, thereby achieving efficient and passive dust removal of the intake air.

[0045] The working process and effects are as follows: When the engine is running, it generates suction. After initial filtration by the air pre-filter 100, the airflow enters the air duct s1 through the air intake channel 21. Guided by the engine's suction, the airflow mainly flows horizontally to the right along the air duct s1 towards the right wall of the air box 25. During this process, fine particles mixed in with the airflow that are not completely filtered by the pre-filter, due to their large inertia, cannot immediately change direction with the airflow and will directly collide with the right wall. After losing kinetic energy, they settle downwards under the action of gravity. The pre-purified airflow then changes direction along the guide plate 323 and is finally drawn into the air outlet channel 22 to supply the air filter of the engine 200. This forms an effective "inertial dust removal" barrier, significantly reducing the particulate matter content entering the engine 200, thereby effectively reducing the wear of the engine's core components, extending the engine's service life and maintenance cycle, and improving the bulldozer's working reliability in harsh dusty environments.

[0046] In some embodiments, the flow guiding component 23 may include a flow guiding plate 231, the upper and lower ends of which are connected to the top and bottom walls of the inner cavity of the air box 25, respectively, and the left and right ends of which are connected to the left wall of the inner cavity of the air box 25 and the outer peripheral wall of the air outlet channel 22, respectively. The flow guiding plate 231, the front wall and the right wall of the air box 25 form an air duct s1, and the output end of the air inlet channel 21 faces the air duct s1. The tail side of the flow guiding plate 231 is connected to the air outlet channel 22. The first flow guiding component is used to make the airflow flow out from the output end of the air inlet channel 21 and flow along a first direction and impact the side wall of the air box 25 for the first particulate matter separation. The second flow guiding component is used to make the airflow impact the side wall and then turn in a second direction and impact the second flow guiding component for the second particulate matter separation. Finally, the airflow enters the air outlet channel 22.

[0047] The guide plate 231 divides the interior of the air box 25 into clearly defined air ducts s1, guiding the airflow from the inlet channel 21 along a predetermined path. This ensures a forced change in airflow direction between the guide plate and the air box wall, enhancing the inertial separation effect. This makes it easier for particulate matter to deposit on the inner wall of the air duct, improving separation uniformity and efficiency. The guide plate 231, by connecting multiple side walls of the air box 25, forms a sealed guiding structure, preventing airflow diffusion or the generation of disordered vortices, reducing flow resistance, maintaining airflow stability and velocity, thereby improving particulate matter separation performance and reducing system pressure drop.

[0048] The air intake plate 231 serves as an internal support element, enhancing the overall rigidity of the air box 25 and preventing deformation under vibration or high-pressure airflow. At the same time, its direct connection with the air outlet duct 22 ensures a smooth airflow transition and reduces local pressure loss.

[0049] In some examples, a portion of the inlet area of ​​the air duct s1 can taper. This taper design at the inlet of air duct s1 creates a Venturi effect, increasing the velocity of the airflow as it enters air duct s1. This strengthens the inertial force of the particles, making them more likely to detach from the airflow trajectory when their direction changes, thus improving initial separation efficiency. The taper structure guides the airflow into the air duct in a concentrated manner, avoiding the generation of eddies or stagnant zones at the inlet, ensuring uniform airflow distribution, further optimizing the separation effect of the subsequent guide assembly 23, and reducing energy loss.

[0050] It should be noted that the negative pressure space s2 is formed by the deflector plate 231, the rear wall of the air box 25, and the outer peripheral wall of the air outlet duct 22. The first or first few times the airflow is drawn into the air outlet duct 22, part of which will be drawn into the engine 200, and the other part will flow into the negative pressure space s2. After the negative pressure space s2 is filled with airflow, subsequent air will not enter the negative pressure space.

[0051] Furthermore, the flow guiding assembly 23 may also include a guide plate 232, which is inclinedly disposed on the rear side of the dust exhaust channel 24 input end. The front end and rear end of the guide plate 232 are respectively connected to the bottom wall and rear wall of the air box 25, and the left end and right end are respectively connected to the outer peripheral wall of the air outlet channel 22 input end and the right wall of the air box 25.

[0052] In this way, the inclined arrangement of the guide plate 232 guides the separated particles to slide along the plate surface towards the input end of the dust exhaust channel 24, preventing particles from accumulating at the bottom of the air box 25 or re-entering the air outlet channel 22 with the airflow, ensuring that the dust exhaust channel 24 efficiently collects and discharges particles. The guide plate 232 and the wall of the air box 25 form an additional guiding surface, causing the airflow to change direction again before the air outlet channel 22, performing secondary separation of residual particles, further improving the air purification effect and protecting the engine 200. As a barrier, the guide plate prevents airflow from flowing back into the dust exhaust channel 24, maintaining unidirectional airflow inside the air box 25, and enhancing the system's sealing and reliability.

[0053] The airflow guide plate 231 is used to make the airflow flow out from the output end of the air inlet channel 21 and flow along the length of the air box 25 and hit the right wall of the air box 25 for the first particulate matter separation. The guide plate 232 is used to make the airflow hit the side wall and then turn along the width of the air box 25 and hit the guide plate 232 for the second particulate matter separation. Finally, the airflow enters the air outlet channel 22.

[0054] In some embodiments, the rear part of the upper end face of the air outlet duct 22 is a forward-sloping slope, and the front part is a flat surface, with the flat surface positioned higher than the bottom surface of the inner cavity of the air box 25. A portion of the left side of the guide plate 232 is in contact with the edge of the slope.

[0055] In this way, the sloping design of the upper surface of the air outlet duct 22 allows for a smooth transition of airflow from the bottom of the air box 25 to the air outlet duct 22, reducing local turbulence and pressure loss, improving airflow efficiency, and reducing energy consumption. The high-level flat design at the front of the air outlet duct 22 forms a physical barrier, preventing particles from the bottom of the air box 25 from directly entering the air outlet duct 22. Combined with the connection between the guide plate 232 and the sloping surface, it ensures that residual particles are fully separated during the upward airflow, further reducing the risk of dust inhalation by the engine 200. The guide plate 232 connects with the edge of the sloping surface, forming a continuous guide surface, optimizing the airflow path, avoiding dead angles, and improving the coordination and efficiency of the overall separation system.

[0056] Please continue reading. Figure 2 and Figure 3 In some embodiments, a spiral-shaped guide plate 211 is provided within the air inlet channel 21. The spiral guide plate 211 causes the airflow entering the air inlet channel 21 to form a swirling flow, using centrifugal force to throw some particles towards the wall of the air inlet channel 21, achieving preliminary separation, reducing the burden on the guide assembly 23 in the subsequent air box 25, and improving the overall separation efficiency. The spiral layout promotes uniform mixing of airflow within the air inlet channel 21, avoiding local high-speed or low-speed zones, ensuring stable airflow entering the air box 25, and enhancing the reliability and consistency of inertial separation. The guide plate is integrated within the air inlet channel 21, eliminating the need for additional complex components, achieving efficient pre-separation while saving manufacturing costs.

[0057] Please combine Figures 1 to 3 The working process inside the bellows 25 is illustrated below.

[0058] The air pre-filter 100 delivers airflow into the air intake duct 21. The airflow, which originally flows vertically along the axial direction of the air intake duct 21, can no longer move in a straight line when it encounters the spiral guide plate 211. The spiral surface of the guide plate 211 forces the airflow to flow along each plate surface. This action transfers part of the kinetic energy of the airflow from axial motion to tangential rotational motion. Therefore, the airflow forms a spiral wind in the air intake duct 21 after passing through the guide plate 211. Under the suction of the engine, the spiral wind enters the air duct s1 and moves along the air duct s1 towards the right wall of the air box 25 until the airflow hits the right wall. The particulate matter mixed in the airflow falls to the bottom wall of the air box 25 after hitting the right wall. With the continuous flow of air, the particulate matter will fall into the dust exhaust duct 24 one after another.

[0059] Since the output end of the air outlet duct 22 is connected to the air filter of the engine 200, and the air outlet duct 22 is located in the second channel s2, under the continuous suction of the engine, the airflow is turned towards the second channel s2 after hitting the right wall. After the airflow is turned, it will hit the inclined guide plate 232. The particles mixed in the airflow will hit the particle plate under the action of gravity and roll down the slope of the guide plate 232 to the bottom wall of the air box 25. With the help of the continuously sucked-in airflow, it will eventually fall into the dust discharge duct 24. At this time, the airflow moves along the guide plate 232 until it smoothly transitions into the air outlet duct 22. Finally, the clean airflow is sucked into the air filter of the engine 200.

[0060] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A bulldozer hood with a transition air duct, characterized in that, include: Hood body (1); Air outlet (2), including: The bellows (25) is mounted on the hood body (1) by means of a shock absorber (3); An air inlet channel (21) is provided on the air box (25), with its output end connected to the top wall of the air box (25) and its input end used to connect to the air pre-filter (100); An air outlet duct (22) extends through the bottom wall of the air box (25); its output end is used to connect to the air filter of the engine (200), and its input end is spaced apart from the top wall of the air box (25). A flow guiding component (23) is provided inside the air box (25) to guide the airflow from the air inlet channel (21) to the air outlet channel (22) and cause the airflow to change direction at least once in the flow path so that the particulate matter in the airflow is separated multiple times under the action of inertial force. The dust discharge channel (24) has its input end connected to the bottom wall of the air box (25) and its output end extended to the outside of the air box (25) for collecting and discharging separated particulate matter.

2. The bulldozer hood with a transition air duct according to claim 1, characterized in that, The flow guiding component (23) includes a flow guiding plate (231), the upper end of which is connected to the top wall and the bottom wall of the inner cavity of the wind box (25) respectively, and the left end and the right end are connected to the left wall of the inner cavity of the wind box (25) and the outer peripheral wall of the air outlet channel (22) respectively. The front and right walls of the air intake plate (231), the air box (25) form an air duct (s1), and the output end of the air inlet channel (21) faces the air duct (s1); the tail side of the air intake plate (231) is connected to the air outlet channel (22).

3. The bulldozer hood with a transition air duct according to claim 2, characterized in that, The portion of the input area of ​​the air duct (s1) shows a gradually narrowing trend.

4. The bulldozer hood with a transition air duct according to claim 2, characterized in that, The flow guiding component (23) also includes a guide plate (232), which is inclinedly arranged on the rear side of the input end of the dust discharge channel (24); the front end and the rear end of the guide plate (232) are respectively connected to the bottom wall and the rear wall of the air box (25), and the left end and the right end are respectively connected to the outer peripheral wall of the input end of the air outlet channel (22) and the right wall of the air box (25).

5. The bulldozer hood with a transition air duct according to claim 4, characterized in that, The rear part of the upper end face of the air outlet channel (22) is a forward-sloping surface, and the front part is a flat surface, and the position of the flat surface is higher than the bottom surface of the inner cavity of the air box (25); A portion of the left side of the guide plate (232) is connected to the edge of the inclined surface.

6. The bulldozer hood with a transition air duct according to claim 1, characterized in that, The air inlet channel (21) is provided with multiple guide plates (211), and the multiple guide plates (211) are arranged in a spiral shape.

7. The bulldozer hood with a transition air duct according to claim 1, characterized in that, An automatic valve (241) is provided at the output end of the dust discharge channel (24).

8. The bulldozer hood with a transition air duct according to claim 7, characterized in that, The automatic valve (241) is a gravity flap valve or an electrically controlled valve.

9. The bulldozer hood with a transition air duct according to claim 1, characterized in that, The shock absorber (3) includes a shock absorber plug (31) and a fastening seat (32). The air box (25) is connected to the machine cover body (1) through the shock absorber plug (31) and the bottom of the shock absorber plug (31) is locked through the fastening seat (32).

10. The bulldozer hood with a transition air duct according to claim 9, characterized in that, The area where the shock absorber (31) connects with the air box (25) and the machine cover body (1) gradually narrows from the top to the bottom.

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