Engine cooling fan

Abstract

The utility model provides an engine cooling fan, and belongs to the technical field of engines. Comprising an engine shell, a fan, a generator belt wheel and a crankshaft driving wheel, the generator belt wheel and the crankshaft driving wheel are rotationally arranged on the engine shell, a clutch idle wheel set comprises a first multi-wedge belt wheel and a first tooth-shaped belt wheel, and a clutch water pump wheel set comprises a second multi-wedge belt wheel and a second tooth-shaped belt wheel. The outer sides of the generator belt wheel, the first multi-wedge belt wheel and the crankshaft driving wheel are wound and are in meshed transmission with a multi-wedge belt, the second multi-wedge belt wheel is meshed with the multi-wedge belt, and the outer sides of the first tooth-shaped belt wheel and the second tooth-shaped belt wheel are wound and are in meshed transmission with a tooth-shaped belt; the first multi-wedge belt wheel, the first tooth-shaped belt wheel, the second multi-wedge belt wheel and the second tooth-shaped belt wheel are controlled by the clutch control part to flexibly rotate or synchronously rotate in a meshed mode, so that the fan can be flexibly controlled to rotate forwards and backwards while the engine drives the water pump and the generator to act, and the engine is cooled or dedusted according to working requirements. The functional effect of the fan on the engine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to an engine cooling fan. Background Art

[0002] During the use of rice-based non-road engines, the rice and its stems and leaves are blown toward the engine body, especially toward the high-temperature area on the exhaust side, by the cooling fan. During the rice harvest season, the rice and its stems and leaves are relatively dry and easily ignited. When they accumulate in the engine body, especially on the exhaust side (exhaust peak temperature 750°C), the rice and its stems and leaves are easily ignited, causing local fires in the engine. Therefore, a reversing fan is urgently needed to blow the rice and its stems and leaves out of the engine compartment in the opposite direction. Utility Model Content

[0003] In view of the above problems, the utility model provides an engine cooling fan.

[0004] In order to achieve the above-mentioned invention object, the technical solution adopted by the utility model is as follows:

[0005] Provided is an engine cooling fan, comprising an engine housing and a fan, and a generator pulley, a clutch idler pulley set, a clutch water pump pulley set and a crankshaft drive pulley rotatably arranged on the engine housing, wherein the clutch idler pulley set comprises a first poly-V belt pulley and a first toothed belt pulley, and the clutch water pump pulley set comprises a second poly-V belt pulley and a second toothed belt pulley;

[0006] The first multi-V belt pulley and the first toothed belt pulley as well as the second multi-V belt pulley and the second toothed belt pulley are all controlled by the clutch control member to engage / disengage coaxially; the outer sides of the generator pulley, the first multi-V belt pulley and the crankshaft drive wheel are wound with a multi-V belt and meshed with each other for transmission; the second multi-V belt pulley is meshed with the multi-V belt; the outer sides of the first toothed belt pulley and the second toothed belt pulley are wound with a toothed belt and meshed with each other for transmission; the input shaft of the fan is connected to the second toothed belt pulley for transmission.

[0007] Furthermore, the clutch control component includes an electromagnetic clutch, and the electromagnetic clutch is respectively located between the first multi-V belt pulley and the first toothed belt pulley and between the second multi-V belt pulley and the second toothed belt pulley.

[0008] Furthermore, the engine housing includes an engine casing, to which a tensioning wheel is rotatably connected. The tensioning wheel is located on one side of the clutch water pump wheel assembly, and a toothed belt is wound around the outer side of the tensioning wheel and meshes with the tensioning wheel. A driving member for driving the tensioning wheel to move is provided on the engine casing.

[0009] Furthermore, the driving member includes an adjusting screw, a slider is linearly slidably arranged on the engine housing, the tensioning wheel is rotatably arranged on the slider, the adjusting screw is parallel to the sliding direction of the slider, one end of the adjusting screw is rotatably connected to the engine housing, and the other end is fixedly connected to an adjusting knob, the adjusting screw is passed through the slider and is threadedly connected to the slider.

[0010] Furthermore, the generator pulley is connected to the output end of the engine, and the second multi-V pulley is drivingly connected to the fan blade input shaft of the water pump.

[0011] Furthermore, the fan includes fixed blades and movable blades, the movable blades are slidably arranged on one side of the fixed blades, and the movable blades have two limit end points on the fixed blades. When the fan rotates to blow air toward the engine casing, the movable blades slide to one limit end point and overlap with the fixed blades. When the fan rotates to blow air toward the outside of the engine casing, the movable blades slide to the other limit end point and slide out from one side edge of the fixed blades.

[0012] Furthermore, a plurality of mutually parallel limiting strips are fixedly arranged on the fixed blades, and the movable blades are slidably embedded in the limiting strips. A spring is arranged in the limiting strips, and the spring is used to drive the movable blades to slide and overlap with the fixed blades.

[0013] The beneficial effects of the utility model are as follows: by controlling the first multi-V belt pulley and the first toothed belt pulley in the idler pulley group and the second multi-V belt pulley and the second toothed belt pulley in the clutch water pump pulley group to flexibly rotate or mesh and rotate synchronously, the engine can flexibly control the forward and reverse rotation of the fan while driving the water pump and the generator, and perform cooling or dust removal operations on the engine according to work needs, thereby improving the functionality and operational convenience of the fan on the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the engine cooling fan gear train structure of Example 1 of the present application.

[0015] Figure 2 This is a schematic diagram of the overall structure of the engine cooling fan of Example 1 of the present application.

[0016] Figure 3 This is a side structural schematic diagram of the engine cooling fan of Example 1 of the present application.

[0017] Figure 4 This is a schematic diagram of the fan stopping and forward rotation heat dissipation states of Example 2 of the present application.

[0018] Figure 5 This is a schematic diagram of the fan reverse dust removal state of Example 2 of the present application.

[0019] Among them, 1. engine housing; 11. generator pulley; 12. water pump; 2. fan; 21. fixed blades; 22. movable blades; 23. limit strips; 3. clutch idler pulley set; 31. first multi-V belt pulley; 32. first toothed belt pulley; 4. clutch water pump pulley set; 41. second multi-V belt pulley; 42. second toothed belt pulley; 5. crankshaft drive wheel; 6. multi-V belt; 7. toothed belt; 8. tensioner; 81. adjusting screw. DETAILED DESCRIPTION

[0020] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] Example 1

[0022] The present application embodiment discloses an engine cooling fan 2, referring to Figure 1 , Figure 2 and Figure 3 , including an engine housing 1 and a fan 2, the engine housing 1 is provided with a generator pulley 11, a clutch idler pulley set 3, a clutch water pump 12 pulley set and a crankshaft drive wheel 5. Among them, the clutch idler pulley set 3 includes a first multi-V belt pulley 31 and a first toothed belt pulley 32, and the clutch water pump 12 pulley set includes a second multi-V belt pulley 41 and a second toothed belt pulley 42.

[0023] The clutch idler wheel group 3 and the clutch water pump 12 wheel group are both provided with clutch control parts, which are used to control the multi-V belt 6 wheels and the toothed belt 7 wheels in the two wheel groups to mesh and transmit synchronously or disengage and rotate independently. The generator pulley 11, the first multi-V belt pulley 31, and the crankshaft drive wheel 5 are wound around and meshed with the multi-V belt 6. The second multi-V belt pulley 41 is located on the outside of the multi-V belt 6 and meshes with the multi-V belt 6 wheels, so that the second multi-V belt 6 rotates in the opposite direction with the generator pulley 11, the first multi-V belt pulley 31, and the crankshaft drive wheel 5 when the multi-V belt 6 rotates. The first toothed belt pulley 32 and the second toothed belt pulley 42 are wound around and meshed with the toothed belt 7. The generator pulley 11 is connected to the output end of the engine, the second multi-V belt pulley 41 is connected to the fan blade input shaft of the water pump 12, and the input shaft of the fan 2 is connected to the second toothed belt pulley 42.

[0024] When the engine is operating normally, the clutch control part controls the coaxial meshing transmission of the second multi-V belt pulley 41 and the second toothed belt pulley 42 in the clutch water pump 12 wheel set, and the first multi-V belt pulley 31 and the first toothed belt pulley 32 in the clutch idler wheel set 3 are separated and rotated, and the engine drives the crankshaft to rotate, and the second multi-V belt pulley 41 in the clutch water pump 12 wheel set rotates to drive the fan blades in the water pump 12 to operate normally. At the same time, the first toothed belt pulley 32 drives the fan 2 to rotate to blow air to the engine housing 1 to dissipate heat from the engine. The multi-V belt 6 passes through the generator pulley 11 and the second multi-V belt pulley 41 in the clutch idler wheel set 3, and then wraps around the crankshaft drive wheel 5, driving the generator pulley 11 to rotate normally. The first toothed belt pulley 32 drives the second toothed belt pulley 42 to rotate through the toothed belt 7. At this time, the second toothed belt pulley 42 and the second multi-V belt pulley 41 are separated from each other, and the rotation does not interfere with each other.

[0025] When it is necessary to clean the residue on the surface of the engine housing 1, the clutch control part controls the first multi-V belt pulley 31 and the first toothed belt pulley 32 in the clutch idler wheel group 3 to separate and rotate independently, and controls the second multi-V belt pulley 41 and the second toothed belt pulley 42 in the clutch water pump 12 wheel group to mesh and rotate synchronously. When the multi-V belt 6 drives the first multi-V belt pulley 31 and the generator pulley 11 to rotate normally and the water pump 12 and the engine operate normally, the second multi-V belt pulley 41 rotates in the opposite direction, the second multi-V belt pulley 41 and the second toothed wheel rotate synchronously, and the second toothed wheel drives the first toothed wheel to rotate, and the first toothed wheel rotates in the opposite direction relative to the first multi-V belt pulley 31, so that the fan 2 is reversed, and the rice, stems and leaves and other flammable residues on the surface of the engine housing 1 are blown out away from the engine. The rotation direction of the fan 2 can be quickly switched without stopping the machine, and the back-blowing interval time can be controlled according to the actual use environment, object, weather and other conditions, or the manual control switch can be used to realize immediate back-blowing for a certain time.

[0026] Furthermore, in the embodiment of the present application, a tensioning wheel 8 is also provided, the engine housing 1 includes an engine casing that protects the engine, the tensioning wheel 8 is rotatably connected to the outside of the engine casing, and the tensioning wheel 8 is located in the toothed belt 7 and meshes with the toothed belt 7, the tensioning wheel 8 and the clutch water pump 12 wheel group and the clutch idler wheel group 3 are arranged in a triangle, and a driving member for driving the tensioning wheel 8 to move is provided on the engine casing. Specifically, a slider is linearly slidably installed on the engine casing, the tensioning wheel 8 is rotatably installed on the slider, the driving member may be an unadjustable screw 81, the adjusting screw 81 is rotatably connected to the engine casing parallel to the sliding direction of the slider, one end of the adjusting screw 81 is coaxially fixed with an adjusting knob, a screw hole is penetrated through the slider, and the adjusting screw 81 passes through the screw hole and is threadedly connected to the screw hole. By rotating the adjusting screw 81, the slider can be driven to move on the engine housing 1, and the tensioning wheel 8 can pull the toothed belt 7 to tighten. When the fan 2 rotates forward and reverse multiple times, the toothed belt 7 is prone to fatigue and stretching. Setting the tensioning wheel 8 can extend the service life of the toothed belt.

[0027] Example 2

[0028] Reference Figure 4 and Figure 5 The difference between Example 2 and Example 1 is that the structure of the fan 2 is different. In the embodiment of the present application, the fan 2 includes a plurality of fixed blades 21, and a plurality of movable blades 22, which are the same in number as the fixed blades 21 and are installed one by one in contact with the fixed blades 21. The fixed blades 21 are rectangular strip blades. The movable blades 22 are slidably connected to the fixed blades 21 along the width direction of the fixed blades 21. The movable blades 22 have two limit end points during the sliding process on the fixed blades 21. When the movable blades 22 move to one limit end point, the movable blades 22 coincide with the fixed blades 21. When the movable blades 22 are located at the other limit end point, the movable blades 22 slide out from one side edge of the fixed blades 21.

[0029] In the embodiment of the present application, when the fan 2 is turning to blow air to the engine housing 1 for heat dissipation, the movable blade 22 moves on the fixed blade 21 to overlap with the fixed blade 21, reducing wind resistance while meeting the basic ventilation and heat dissipation requirements of the engine housing 1 and reducing the amount of slag blown toward the engine. When it is necessary to blow the slag on the engine housing 1 outward, the fan 2 is reversed. During the reversal of the fan 2, the movable blade 22 slides to another limit point on the fixed blade 21, so that the movable blade 22 slides out from one side of the fixed blade 21, increasing the area of ​​the fan 2 blades, increasing the air supply, and enhancing the suction effect of the slag on the surface of the engine housing 1.

[0030] In the embodiment of the present application, two mutually parallel limiting strips 23 are fixedly provided on the fixed blade 21, and a bar-shaped limiting hole is opened on the limiting strip 23. The movable blade 22 is inserted into the limiting strip 23. The movable blade 22 is limited by the limiting strip 23, which makes it more stable during the sliding process, thereby improving the stability of the fan 2. Furthermore, a spring can be provided in the limiting hole of the limiting strip 23, one end of the spring abuts against the inner wall of the limiting strip 23, and the other end abuts against the movable blade 22. The spring is used to drive the movable blade 22 to slide and overlap with the fixed blade 21. When the fan 2 stops rotating, the movable blade 22 can be retracted into the fixed blade 21 to reduce the dust falling in the sliding area of ​​the fixed blade 21 for the movable blade 22, and keep the movable blade 22 sliding smoothly.

[0031] It should be understood by those skilled in the art that, although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An engine cooling fan (2), characterized in that: The invention comprises an engine housing (1) and a fan (2), and a generator pulley (11), a clutch idler pulley set (3), a clutch water pump (12) pulley set and a crankshaft drive wheel (5) rotatably arranged on the engine housing (1), wherein the clutch idler pulley set (3) comprises a first multi-V belt pulley (31) and a first toothed belt pulley (32), and the clutch water pump (12) pulley set comprises a second multi-V belt pulley (41) and a second toothed belt pulley (42); The first multi-V belt pulley (31) and the first toothed belt pulley (32) as well as the second multi-V belt pulley (41) and the second toothed belt pulley (42) are all controlled to engage / disengage coaxially through a clutch control component; a multi-V belt (6) is wound around and meshed with the outer sides of the generator pulley (11), the first multi-V belt pulley (31) and the crankshaft drive wheel (5); the second multi-V belt pulley (41) meshes with the multi-V belt (6); a toothed belt (7) is wound around and meshed with the outer sides of the first toothed belt pulley (32) and the second toothed belt pulley (42); and the input shaft of the fan (2) is connected to the second toothed belt pulley (42) in driving connection.

2. An engine cooling fan (2) according to claim 1, characterized in that: The clutch control component comprises an electromagnetic clutch, which is respectively located between the first multi-V belt pulley (31) and the first toothed belt pulley (32) and between the second multi-V belt pulley (41) and the second toothed belt pulley (42).

3. An engine cooling fan (2) according to claim 2, characterized in that: The engine housing (1) comprises an engine casing, and a tension wheel (8) is rotatably connected to the engine housing (1), the tension wheel (8) is located on one side of a clutch water pump (12) wheel assembly, the toothed belt (7) is wound around the outside of the tension wheel (8) and meshes with the tension wheel (8), and a driving member for driving the tension wheel (8) to move is provided on the engine casing.

4. An engine cooling fan (2) according to claim 3, characterized in that: The driving member comprises an adjusting screw (81), a slider is linearly slidably arranged on the engine housing (1), the tension wheel (8) is rotatably arranged on the slider, the adjusting screw (81) is parallel to the sliding direction of the slider, one end of the adjusting screw (81) is rotatably connected to the engine housing (1), and the other end is fixedly connected to an adjusting knob, the adjusting screw (81) is passed through the slider and is threadably connected to the slider.

5. The engine cooling fan (2) according to claim 1, characterized in that: The generator pulley (11) is connected to the output end of the engine, and the second multi-V belt pulley (41) is drivingly connected to the fan blade input shaft of the water pump (12).

6. An engine cooling fan (2) according to any one of claims 1 to 5, characterized in that: The fan (2) comprises a fixed blade (21) and a movable blade (22); the movable blade (22) is slidably arranged on one side of the fixed blade (21); the movable blade (22) has two limit end points on the fixed blade (21); when the fan (2) rotates to blow air toward the engine casing, the movable blade (22) slides to one limit end point and overlaps with the fixed blade (21); when the fan (2) rotates to blow air toward the outside of the engine casing, the movable blade (22) slides to the other limit end point and slides out from a side edge of the fixed blade (21).

7. An engine cooling fan (2) according to claim 6, characterized in that: A plurality of mutually parallel limiting strips (23) are fixedly arranged on the fixed blade (21), and the movable blade (22) is slidably embedded in the limiting strip (23). A spring is arranged in the limiting strip (23), and the spring is used to drive the movable blade (22) to slide and overlap with the fixed blade (21).

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