Pneumatic turnover fan arrangement structure and tractor

Abstract

The utility model relates to a pneumatic turnover fan arrangement structure and a tractor, the pneumatic turnover fan arrangement structure comprises a blowback fan, an air pump and an electromagnetic valve, an air outlet of the air pump is communicated with an air inlet of the electromagnetic valve through a pipeline, the air pump is an air pump carried by an engine, and the electromagnetic valve is communicated with the blowback fan through a pipeline. And an air outlet of the electromagnetic valve is connected with a hydraulic plunger mechanism of the blowback fan through a pipeline. By the adoption of the technical scheme, the technical problems that according to an existing hydraulic turnover fan, a reverse blowing scheme system is relatively complex, the design cost and the maintenance cost are relatively high, and the oil leakage risk exists can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of tractor heat dissipation, in particular to a pneumatic flip fan arrangement structure and a tractor. Background Art

[0002] At present, tractor products are equipped with many types of implements, with complex working conditions and a lot of dust and weeds. After the whole machine has been working for a period of time, there will be a lot of dust or weeds in front of the hood and the heat sink, which will reduce the cooling air intake and reduce the heat dissipation effect, affecting the heat dissipation performance of the engine. When the outlet temperature of the engine coolant reaches the torque limit temperature value set by the engine, the engine will reduce performance, affecting the normal operation of the whole machine, and it is necessary to stop the machine to maintain and clean the hood and heat sink, affecting the working efficiency.

[0003] At present, some tractors use a hydraulic flip fan solution, which uses hydraulic pressure to drive the rotation of the blades to achieve backblowing, blowing away debris outside the hood and the heat sink. However, the hydraulic flip fan requires the addition of hydraulic pipelines, control valves, filters and other components, which greatly increases the design cost and maintenance cost. Utility Model Content

[0004] The utility model aims at solving the technical problems that the existing hydraulic flip fan back-blowing scheme system is relatively complex, the design and maintenance costs are relatively high, and there is a risk of oil leakage, and provides a pneumatic flip fan arrangement structure and a tractor.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] On the one hand, the utility model provides a pneumatic flip fan arrangement structure, including a back-blowing fan, an air pump and a solenoid valve, the air outlet of the air pump is connected to the air inlet of the solenoid valve through a pipeline, and the air pump is an air pump provided by the engine, and the air outlet of the solenoid valve is connected to the hydraulic plunger mechanism of the back-blowing fan through a pipeline.

[0007] The beneficial effects of the utility model are as follows: when the solenoid valve is started, the air pump pumps air into the back-blowing fan, and the air pressure acts on the hydraulic plunger mechanism, which drives the back-blowing fan to change the angle of the fan blades. Since the rotation direction of the back-blowing fan remains unchanged, the fan blades are flipped to realize the back-blowing fan changing from suction to blowing, thereby blowing away the debris or dust adsorbed on the outside of the engine cover and the heat dissipation package; wherein, the air pump is provided by the engine, and only needs to be equipped with a solenoid valve and corresponding pipelines, which solves the technical problems that the existing hydraulic flip fan solution for back-blowing is relatively complex, the design and maintenance costs are relatively high, and there is a risk of oil leakage.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Further, the solenoid valve is communicatively connected to a control switch.

[0010] The beneficial effect of adopting the above further solution is that the opening and closing of the solenoid valve can be controlled by the control switch.

[0011] Further, the control switch is connected to a wire harness, and the control switch is connected to the solenoid valve through the wire harness.

[0012] The beneficial effect of adopting the above further solution is that stable control signal transmission can be achieved through the wire harness.

[0013] Further, the air inlet of the air pump is connected and communicated with an air filter through a pipeline.

[0014] The beneficial effect of adopting the above further solution is that the air inlet of the air pump is connected and communicated with an air filter through a pipeline.

[0015] Further, the air outlet of the air filter is connected and communicated with an air filter outlet pipe, and the air inlet of the air pump is communicated with an air pump intake pipe. The outlet end of the air filter outlet pipe is communicated with the intake end of the air pump intake pipe.

[0016] The beneficial effect of adopting the above further solution is that when the solenoid valve is activated, the air pump pumps air. After the air filter filters the air, the air sequentially passes through the air filter outlet pipe and is guided, and then enters the air pump.

[0017] Further, the outlet end of the air filter outlet pipe and the intake end of the air pump intake pipe are simultaneously connected to an air intake joint, and both ends of the air intake joint are respectively communicated with the outlet end of the air filter outlet pipe and the intake end of the air pump intake pipe.

[0018] The beneficial effect of adopting the above further solution is that the outlet end of the air filter outlet pipe and the intake end of the air pump intake pipe are simultaneously connected to an air intake joint, and both ends of the air intake joint are respectively communicated with the outlet end of the air filter outlet pipe and the intake end of the air pump intake pipe.

[0019] Further, the pipeline connecting the air outlet of the solenoid valve to the backflush fan is a fan pneumatic pipeline.

[0020] The beneficial effect of adopting the above further solution is that the air discharged from the solenoid valve can be smoothly guided to the backflush fan through the fan pneumatic pipeline, and under the action of the hydraulic plunger mechanism, the fan blades of the backflush fan can rotate smoothly.

[0021] Further, the backflush fan includes a rotating shaft and a plurality of fan blades. The plurality of fan blades are hinged to the rotating shaft, and the hydraulic plunger mechanism of the backflush fan is connected to the plurality of fan blades.

[0022] The beneficial effects of adopting the above further solution are as follows: It is convenient to change the torsion angle of the fan blades through the hydraulic plunger mechanism, enabling the fan to switch between the air suction and air blowing states, cleaning the dust adsorbed on the radiator surface due to the fan's air suction, preventing the engine water temperature and hydraulic oil temperature from being too high due to this, which affects the performance of the whole machine, and realizing continuous operation.

[0023] Further, a return spring is connected to the fan blade. One end of the return spring is connected to the fan blade, and the other end of the return spring is connected to the rotating shaft.

[0024] The beneficial effects of adopting the above further solution are as follows: The reverse blowing fan itself has a self-return function of the return spring. After the commutation function fails, it will continue to operate at the maximum air volume angle in the air suction state.

[0025] On the other hand, the present invention provides a tractor, including the pneumatic reversing fan arrangement structure described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of the pneumatic reversing fan arrangement structure of the present invention;

[0027] Figure 2 It is a partial cross-sectional view of the reverse blowing fan of the present invention;

[0028] Figure 3 For Figure 2 Partial enlarged view.

[0029] In the drawings, the list of components represented by each reference numeral is as follows:

[0030] 1. Reverse blowing fan; 11. Fan seat body; 12. Bearing; 13. Fan blade shaft seat; 131. Pin shaft; 14. Fan blade; 15. Oil cylinder; 16. Return spring; 17. Piston; 171. Sealing ring; 18. Air inlet device;

[0031] 2. Air pump; 21. Air pump intake pipe;

[0032] 3. Solenoid valve;

[0033] 4. Control switch; 41. Wiring harness;

[0034] 5. Air filter; 51. Air filter outlet pipe; 52. Air intake joint;

[0035] 6. Fan pneumatic pipeline. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0037] On the one hand, the utility model provides a pneumatic flip fan arrangement structure, which is described in detail below.

[0038] Example 1

[0039] like Figure 1 A pneumatic flip fan arrangement structure includes a back-blowing fan 1, an air pump 2 and a solenoid valve 3. The air outlet of the air pump 2 is connected to the air inlet of the solenoid valve 3 through a pipeline, and the air pump 2 is an air pump provided by the engine. The air outlet of the solenoid valve 3 is connected to the hydraulic plunger mechanism of the back-blowing fan 1 through a pipeline.

[0040] The beneficial effects of this embodiment are as follows: the solenoid valve 3 is started, the air pump 2 pumps air into the back-blowing fan 1, and the air pressure acts on the hydraulic plunger mechanism, which drives the back-blowing fan 1 to change the angle of the fan blades. Since the rotation direction of the back-blowing fan 1 remains unchanged, the fan blades are flipped to realize the back-blowing fan 1 changing from suction to blowing, thereby blowing away the debris or dust adsorbed on the outside of the hood and the heat dissipation package; wherein, the air pump 2 is provided by the engine, and only the solenoid valve 3 and the corresponding pipelines need to be equipped, which solves the technical problems that the existing hydraulic flip fan solution for back-blowing is relatively complex, the design and maintenance costs are relatively high, and there is a risk of oil leakage.

[0041] As a specific solution of the above embodiment, the back-blowing fan 1 can be called a back-blowing fan or a reversing fan or a heat dissipation fan. The back-blowing fan 1 is arranged opposite to the radiator.

[0042] In order to keep the radiator from being blocked and ensure the heat dissipation power, the technology of the back-blowing fan 1 is applied to agricultural machinery products, which can reduce the user's downtime for cleaning and improve work efficiency.

[0043] As a parallel solution of the above embodiment, the air pump 2 can be replaced by a separate air compressor. The air pump 2 can be an air pump with a filtering function to directly take air from the outside.

[0044] like Figure 2 and Figure 3 The back-blowing fan 1 comprises a fan seat 11, a bearing 12 whose outer ring is fixedly connected to the inner side of the fan seat 11, a blade shaft seat 13 whose outer side is fixedly connected to the inner ring of the bearing 12, and a plurality of blades 14 which are evenly arranged in the circumference and whose ends are fixedly connected to the blade shaft seat 13. An eccentric circular hole is provided on the blade shaft seat 13, and a pin 131 is fixed to the eccentric circular hole.

[0045] An oil cylinder 15 is provided in the fan seat 11 and is slidably connected to the inner side of the blade shaft seat 13. The oil cylinder 15 abuts against the pin shaft 131, and a return spring 16 is provided between the oil cylinder 15 and the fan seat 11. The two ends of the return spring 16 abut against the fan seat 11 and the oil cylinder 15 respectively.

[0046] Inside the fan base 11, a piston 17 communicating with the oil cylinder 15 is also fixed. A sealing ring 171 abutting against the fan base 11 is fixed on the outer side of the piston 17. An air inlet 18 is connected to and communicates with the outer end of the piston 17. The air inlet 18 is used to communicate with the air outlet of the solenoid valve 3. The piston 17, the sealing ring 171 and the oil cylinder 15 form a sealed cavity.

[0047] In this embodiment, the hydraulic plunger mechanism includes an air inlet 18, a piston 17, an oil cylinder 15, a pin shaft 131 and a return spring 16.

[0048] Air enters the piston 17 from the air inlet 18. The piston 17, the sealing ring 171 and the oil cylinder 15 form a sealed cavity. When the pressure in the cavity exceeds the elastic force of the return spring 16, the air pushes the oil cylinder 15 to move to the right against the elastic force of the return spring 16. The oil cylinder 15 pushes the pin shaft 131 to perform an eccentric motion around the center of the fan blade seat 13. The fan blade seat 13 drives the fan blade 14 to rotate, and finally realizes the function of blowing air forward and backward through the rotation of the fan blade 14.

[0049] When the pressure in the cavity is lower than the elastic force of the return spring 16, the return spring 16 rebounds and drives the fan blade 14 to rotate back.

[0050] Among them, the fan base 11 includes a connecting ring and two connecting plates respectively connected to both ends of the connecting ring. The connecting ring and the connecting plates are hermetically connected by bolts and rubber rings. The piston 17 is installed on one of the connecting plates and opens towards the oil cylinder 15. The oil cylinder 15 is slidably connected to the inner side of the one connecting plate. One end of the return spring 16 abuts against the inner side of the other connecting plate.

[0051] Embodiment 2

[0052] As Figure 1 , on the basis of Embodiment 1, the solenoid valve 3 is communicatively connected to a control switch 4.

[0053] The beneficial effect of adopting the preferred solution in the above embodiment is that the opening and closing of the solenoid valve 3 can be controlled by the control switch 4.

[0054] During the operation of the whole machine, the control switch 4 is not operated. The reverse blowing fan 1 is in a normal operating state.

[0055] During the operation of the whole machine, the control switch 4 is pressed or released.

[0056] Embodiment 3

[0057] As Figure 1 , on the basis of Embodiments 1 and 2, the control switch 4 is connected to a wire harness 41, and the control switch 4 is connected to the solenoid valve 3 through the wire harness 41.

[0058] The beneficial effect of adopting the preferred solution in the above embodiment is that stable control signal transmission can be achieved through the wire harness 41.

[0059] Embodiment 4

[0060] As Figure 1 , on the basis of Embodiments 1-3, the air inlet of the air pump 2 is connected and communicated with an air filter 5 through a pipeline.

[0061] The beneficial effect of adopting the preferred solution in the above embodiment is that the air entering the air pump 2 can be filtered by the air filter 5 to protect the engine, the solenoid valve 3 and the entire backflush pipeline.

[0062] As an alternative solution to the above embodiment, the air filter 5 can be externally connected to a pre-filter and related pipelines.

[0063] Embodiment 5

[0064] As Figure 1 , on the basis of Embodiments 1-4, the air outlet of the air filter 5 is connected and communicated with an air filter outlet pipe 51, and the air inlet of the air pump 2 is communicated with an air pump intake pipe 21. The outlet end of the air filter outlet pipe 51 is communicated with the intake end of the air pump intake pipe 21.

[0065] The beneficial effect of adopting the preferred solution in the above embodiment is that when the solenoid valve 3 is started, the air pump 2 pumps air. After the air filter 5 filters the air, the air sequentially passes through the air filter outlet pipe 51 and is guided by the air filter outlet pipe 51 and then enters the air pump 2.

[0066] Embodiment 6

[0067] As Figure 1 , on the basis of Embodiments 1-5, the outlet end of the air filter outlet pipe 51 and the intake end of the air pump intake pipe 21 are simultaneously connected with an air intake joint 52. Both ends of the air intake joint 52 are respectively communicated with the outlet end of the air filter outlet pipe 51 and the intake end of the air pump intake pipe 21.

[0068] The beneficial effect of adopting the preferred solution in the above embodiment is that the smooth connection between the air filter outlet pipe 51 and the air pump intake pipe 21 can be achieved through the air intake joint 52, and the pipeline can be turned to facilitate the relevant components of the equipment.

[0069] Among them, both the air filter outlet pipe 51 and the air pump intake pipe 21 are rubber hoses.

[0070] Embodiment 7

[0071] As Figure 1 , on the basis of Embodiments 1-6, the pipeline connecting the outlet of the solenoid valve 3 to the backflush fan 1 is a fan pneumatic pipeline 6. The fan pneumatic pipeline 6 is communicated with an air inlet 18.

[0072] The beneficial effect of adopting the preferred solution in the above embodiment is that the air discharged from the solenoid valve 3 is smoothly guided to the back-blowing fan 1 through the fan pneumatic pipeline 6, and the fan blades of the back-blowing fan 1 are smoothly rotated under the action of the hydraulic plunger mechanism.

[0073] Example 8

[0074] like Figure 1 On the basis of embodiments 1-7, the back-blowing fan 1 includes a rotating shaft and a plurality of fan blades, the plurality of fan blades are hinged to the rotating shaft, and the hydraulic plunger mechanism of the back-blowing fan 1 is connected to the plurality of fan blades.

[0075] The beneficial effect of adopting the preferred scheme in the above embodiment is that it is easy to change the torsion angle of the fan blades through the hydraulic plunger mechanism, so that the fan can switch between the suction and blowing states, and the dust adsorbed on the surface of the radiator due to the suction of the fan can be cleaned up, avoiding the engine water temperature and hydraulic oil temperature being too high and affecting the performance of the whole machine, thereby achieving continuous operation.

[0076] It should be noted that the internal structure, rotating shaft, fan blades, return spring and hydraulic plunger mechanism of the back-blowing fan 1 are prior art and will not be described in detail here.

[0077] Example 9

[0078] like Figure 1 On the basis of Embodiment 1-8, the fan blade is connected to a return spring, one end of the return spring is connected to the fan blade, and the other end of the return spring is connected to the rotating shaft.

[0079] The beneficial effect of adopting the preferred solution in the above embodiment is that the back-blowing fan 1 itself has a self-resetting function with a reset spring, and after the reversing function fails, it will continue to operate at the maximum air volume angle in the suction state.

[0080] 1) When the whole machine is working normally, the control switch 4 is in the closed state, and all the hydraulic oil is supplied to the tractor, the cutting table cylinder, the reel cylinder and other working devices for the normal operation of the whole machine. There is no pressure oil in the actuator inside the back-blowing fan 1, the fan blades are at the initial angle, and the back-blowing fan 1 is in the suction working mode.

[0081] 2) After the whole machine has been in operation for a period of time and the radiator surface has absorbed a lot of foreign objects such as dust, straw, weeds, etc. floating in the air, the user controls the control switch 4 to be pressed or released during the operation of the whole machine.

[0082] When the whole machine is running normally, air passes through the air filter 5, the air outlet pipe 51 of the air filter, the air intake joint 52, and the air intake pipe 21 of the air pump, and then enters the air pump 2 after being filtered. When the control switch 4 is pressed, the solenoid valve 3 is powered on through the wire harness 41. The air pump 2 pumps the air into the fan pneumatic pipeline 6 and the hydraulic plunger structure of the back-blowing fan 1 in sequence. At this time, the hydraulic plunger structure will overcome the return spring force inside the back-blowing fan 1 to make the fan blades flip. Since the rotation direction of the fan remains unchanged, the flipping of the fan blades realizes the change of the fan from sucking air to blowing air, thereby blowing off the sundries or dust adsorbed on the outside of the engine hood and the radiator pack. When the control switch 4 is released, the solenoid valve 3 is powered off and stops working, and the air in the fan pneumatic pipeline 6 and the back-blowing fan 1 is depressurized through the solenoid valve 3. At the same time, the return spring force of the back-blowing fan 1 makes the fan blades flip back to their original positions, and the fan returns to its initial state. In this way, a process of back-blowing maintenance is completed. This process does not require the machine to stop, and the control switch 4 can be operated at any time during the operation of the whole machine. The operation is simple, saving the time for shutdown maintenance, and effectively improving the operation efficiency and operation income of users.

[0083] On the other hand, the present invention provides a tractor, which will be specifically described below.

[0084] Embodiment 10

[0085] A tractor includes a pneumatic flipping fan arrangement structure as described in Embodiments 1-9.

[0086] The beneficial effects of adopting the technical solution of the present invention are as follows: 1) It is not necessary to stop the machine for cleaning sundries, improving the utilization rate of the machine and increasing the income of users; 2) Without manual participation, the back-blowing operation of the back-blowing fan 1 can be carried out at any time through the control switch 4, which can ensure that the machine performance is always in the best state;

[0087] 3) The system structure is simple, reducing the risk of pipeline leakage;

[0088] 4) The design cost and maintenance cost are effectively reduced.

[0089] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0090] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0091] In the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0092] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher level than the second feature in terms of horizontal height. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower level than the second feature in terms of horizontal height.

[0093] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0094] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A pneumatic flip fan arrangement structure, characterized in that: The invention comprises a back-blowing fan (1), an air pump (2) and a solenoid valve (3), wherein the air outlet of the air pump (2) is connected to the air inlet of the solenoid valve (3) through a pipeline, and the air pump (2) is an air pump provided by the engine, and the air outlet of the solenoid valve (3) is connected to the hydraulic plunger mechanism of the back-blowing fan (1) through a pipeline.

2. The pneumatic flip fan arrangement structure according to claim 1, characterized in that: The solenoid valve (3) is communicatively connected to a control switch (4).

3. The pneumatic flip fan arrangement structure according to claim 2, characterized in that: The control switch (4) is connected to a wiring harness (41), and the control switch (4) is connected to the solenoid valve (3) via the wiring harness (41).

4. The pneumatic flip fan arrangement structure according to claim 1, characterized in that: The air inlet of the air pump (2) is connected to an air filter (5) via a pipeline.

5. The pneumatic flip fan arrangement structure according to claim 4, characterized in that: The air outlet of the air filter (5) is connected to and communicated with an air filter outlet pipe (51), and the air inlet of the air pump (2) is communicated with an air pump air intake pipe (21), and the air outlet end of the air filter outlet pipe (51) is communicated with the air intake end of the air pump air intake pipe (21).

6. The pneumatic flip fan arrangement structure according to claim 5, characterized in that: The air outlet end of the air filter outlet pipe (51) and the air inlet end of the air pump air inlet pipe (21) are both connected to an air inlet connector (52), and the two ends of the air inlet connector (52) are respectively connected to the air outlet end of the air filter outlet pipe (51) and the air inlet end of the air pump air inlet pipe (21).

7. The pneumatic flip fan arrangement structure according to any one of claims 1 to 6, characterized in that: The pipeline through which the air outlet of the solenoid valve (3) is connected to the back-blowing fan (1) is the fan pneumatic pipeline (6).

8. The pneumatic flip fan arrangement structure according to any one of claims 1 to 6, characterized in that: The back-blowing fan (1) comprises a rotating shaft and a plurality of fan blades, wherein the plurality of fan blades are hinged to the rotating shaft, and a hydraulic plunger mechanism of the back-blowing fan (1) is connected to the plurality of fan blades.

9. The pneumatic flip fan arrangement structure according to claim 8, characterized in that: The fan blade is connected with a return spring, one end of the return spring is connected to the fan blade, and the other end of the return spring is connected to the rotating shaft.

10. A tractor, characterized in that: It comprises an aerodynamic flip fan arrangement structure as described in any one of claims 1-9.

Images