CN115355287B

CN115355287B - Forward and reverse rotation transmission device of cooling fan

Info

Publication number: CN115355287B
Application number: CN202210759757.3A
Authority: CN
Inventors: 任建华; 赵军; 闫传金; 吴立军; 马瑞新; 袁明勇; 王丰阳; 刘正芳; 唐文韬; 张希升; 李丽
Original assignee: Jotec International Heavy Industry Qingdao Co Ltd
Current assignee: Jotec International Heavy Industry Qingdao Co Ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2023-10-27
Anticipated expiration: 2042-06-30
Also published as: CN115355287A

Abstract

The application relates to the technical field of engines and discloses a positive and negative rotation transmission device of a cooling fan, which comprises a power output end, a middle shaft belt pulley, a transition belt pulley, a movable disc belt pulley, a tensioning pull rod, a motor, a speed reducer and a control device, wherein a transmission ratio sensor is arranged on the speed reducer and used for collecting the transmission ratio of the speed reducer, a temperature sensor is arranged on the power output end and used for collecting the temperature of a sealed cabin of the engine, an image sensor is also arranged on the power output end and used for collecting the volume of a blockage at the cooling fan, and a time sensor is arranged on the movable disc belt pulley and used for detecting the rotation time of the movable disc belt pulley. The power output end and the tensioning pull rod are controlled by the control device, so that the forward and reverse rotation switching time interval, the forward and reverse rotation time and the rotating speed of the movable pulley can be well set according to the actual working state of the transmission device, the stability of the device is effectively improved, and the waste of resources is avoided.

Description

Forward and reverse rotation transmission device of cooling fan

Technical Field

The application relates to the technical field of engines, in particular to a forward and reverse rotation transmission device of a cooling fan.

Background

Along with the continuous improvement of the agricultural level in China, harvesting of crops is basically carried out by a harvester, the harvester is an integrated machine for harvesting the crops, harvesting and threshing are completed at one time, grains are concentrated in a storage bin, then the grains are conveyed to a transport vehicle through a conveyor belt, or the grains can be harvested manually, straw of the crops such as rice, wheat and the like is laid in the field, and then the grain harvesting machine is used for picking up and threshing. Crop harvesting machinery for harvesting grain crop seeds and straw of rice, wheat and the like.

At present, the heat radiation system of grain harvesting machinery in domestic market mainly uses belt transmission, and belt transmission has the characteristics of low maintenance cost and high reliability, and in the operation process of grain harvesting machinery, the phenomenon that dust and broken leaves block the air inlet hole of a radiator often occurs, so that the problem of high temperature of grain harvesting machinery is easily caused.

In the prior art, in order to avoid the fault phenomenon, manufacturers mostly adopt methods of enlarging the area of an air inlet hole, changing the air inlet position, adding a impurity removing device, reversing a fan for dust removal and the like. The method of reversing the fan has good dust removing effect on dust adsorbed on the surface of the air inlet hole. The reversing fan is driven by a belt, is driven by an electric motor, is driven by a hydraulic motor, is controlled by a hydraulic motor or is controlled by an electric motor, and is provided with fins.

Therefore, how to provide a transmission device capable of improving the reliability of the cooling fan is a technical problem to be solved at present.

Disclosure of Invention

The embodiment of the application provides a forward and reverse rotation transmission device of a cooling fan, which is automatically controlled in a motor control mode so as to judge the working state, and sets the forward and reverse rotation switching time interval and the forward and reverse rotation time according to the actual situation, thereby effectively solving the problem that the rotation speed and the rotation time of the cooling fan cannot be adjusted according to the actual working condition in the prior art and effectively improving the reliability of the transmission device.

In order to achieve the above object, the present application provides a forward and reverse rotation transmission device of a cooling fan, the device comprising:

a power output end;

the intermediate shaft belt pulley is connected with the power output end;

the transition belt pulley is connected with the intermediate shaft belt pulley;

the movable disc belt pulley is connected with the transition belt pulley;

the tensioning pull rod is connected with the movable disc belt pulley and used for driving the movable disc belt pulley to change the steering direction of the cooling fan;

the motor is connected with the tensioning pull rod and used for controlling the rotating speed of the tensioning pull rod;

the speed reducer is connected with the motor and used for reducing the speed of the motor;

the speed reducer is provided with a transmission ratio sensor, and the transmission ratio of the speed reducer is acquired through the transmission ratio sensor;

the movable disc belt pulley, the power output end and the transition belt pulley are connected through a first belt closed loop; the intermediate shaft belt pulley, the transition belt pulley and the movable disc belt pulley are mutually connected to form a closed loop;

the power output end is provided with a temperature sensor, the temperature of the engine sealed cabin is acquired through the temperature sensor, the power output end is also provided with an image sensor, and the volume of the blockage at the cooling fan is acquired through the image sensor;

the movable disc belt pulley is provided with a time sensor for detecting the rotation time of the movable disc belt pulley;

and the control device is respectively and electrically connected with the power output end and the tensioning pull rod so as to control the power output end and the tensioning pull rod.

Preferably, the movable disc belt pulley comprises a movable disc, a first belt pulley, a second belt pulley and a third belt pulley, and the first belt pulley, the second belt pulley and the third belt pulley are arranged on the movable disc in a triangle shape;

the first belt pulley, the second belt pulley and the third belt pulley are respectively provided with a plurality of transmission surfaces, and are connected in a closed loop through a second belt;

the first belt pulley or the third belt pulley is connected to the second belt pulley through the first belt, and the second belt pulley is used for driving the cooling fan.

Preferably, a first tensioning wheel and a second tensioning wheel are further arranged between the intermediate shaft belt pulley and the power output end.

Preferably, the apparatus further comprises:

the bracket is hinged to the tail end of the tensioning pull rod;

the gear is connected to the motor, and the gear shaft is provided with the gear, the gear shaft is connected to the tensioning pull rod, and the gear is used for driving the tensioning pull rod to rotate around the bracket.

Preferably, the tension rod includes:

a screw;

the compression spring is sleeved on the outer side of the screw rod;

and the sliding sleeve is arranged between the screw rod and the compression spring.

Preferably, the control device includes:

the acquisition module is used for acquiring the temperature of the engine sealed cabin, the volume of the blockage, the transmission ratio of the speed reducer and the time when the movable disc belt pulley rotates positively;

the processing module is used for adjusting the rotating speed of the forward rotation of the movable disc belt pulley according to the temperature of the engine sealed cabin, adjusting the reverse rotation time of the movable disc belt pulley according to the forward rotation time of the movable disc belt pulley, and adjusting the forward and reverse rotation switching time of the movable disc belt pulley according to the transmission ratio of the speed reducer;

and the control module is used for controlling the power output end and the tensioning pull rod.

Preferably, in the processing module, when the rotational speed of the pulley of the movable disk is adjusted according to the temperature of the engine compartment,

determining the temperature A of the engine sealed cabin, presetting a temperature matrix A0 of the engine sealed cabin, and setting A0 (A1, A2, A3 and A4), wherein A1 is the temperature of a first preset engine sealed cabin, A2 is the temperature of a second preset engine sealed cabin, A3 is the temperature of a third preset engine sealed cabin, A4 is the temperature of a fourth preset engine sealed cabin, and A1 is more than A2 and less than A3 and less than A4;

presetting a forward rotation speed matrix B0 of the movable disk pulley, and setting B0 (B1, B2, B3 and B4), wherein B1 is a first preset forward rotation speed, B2 is a second preset forward rotation speed, B3 is a third preset forward rotation speed, B4 is a fourth preset forward rotation speed, and B1 is more than B2 and less than B3 and less than B4;

setting the positive rotation speed of the movable disc belt pulley according to the relation between the temperature A of the engine sealed cabin and the temperature matrix of each preset engine sealed cabin:

when A < A1, selecting the first preset forward rotation speed B1 as the forward rotation speed of the movable disc belt pulley;

when A1 is less than or equal to A2, selecting the second preset forward rotation speed B2 as the forward rotation speed of the movable disc belt pulley;

when A2 is less than or equal to A3, selecting the third preset forward rotation speed B3 as the forward rotation speed of the movable disc belt pulley;

when A3 is less than or equal to A < A4, the fourth preset forward rotation speed B4 is selected as the forward rotation speed of the movable disc belt pulley.

Preferably, in the process module, when the reverse rotation time of the movable-disc pulley is adjusted according to the forward rotation time of the movable-disc pulley,

determining the forward rotation time C of the movable disc belt pulley, presetting a forward rotation time matrix C0 of the movable disc belt pulley, and setting C0 (C1, C2, C3 and C4), wherein C1 is first preset forward rotation time, C2 is second preset forward rotation time, C3 is third preset forward rotation time, C4 is fourth preset forward rotation time, and C1 is more than C2 and less than C3 and less than C4;

presetting a reversing time matrix D0 of the movable disc belt pulley, and setting D0 (D1, D2, D3 and D4), wherein D1 is a first preset reversing time, D2 is a second preset reversing time, D3 is a third preset reversing time, D4 is a fourth preset reversing time, and D1 is more than D2 and less than D3 and less than D4;

setting the reverse rotation time of the movable disc belt pulley according to the relation between the forward rotation time C of the movable disc belt pulley and the forward rotation time matrix of each preset movable disc belt pulley:

when C is smaller than C1, selecting the first preset reversal time D1 as the reversal time of the movable disc belt pulley;

when C1 is less than or equal to C2, selecting the second preset reversal time D2 as the reversal time of the movable disc belt pulley;

when C2 is less than or equal to C3, selecting the third preset reversal time D3 as the reversal time of the movable disc belt pulley;

when C3 is less than or equal to C4, the fourth preset reversal time D4 is selected as the reversal time of the movable disc belt pulley.

Preferably, in the processing module, the reverse rotation time of the movable disk pulley is also corrected according to the volume of the blockage,

determining the volume E of the plugs, presetting a volume matrix E0 of the plugs, and setting E0 (E1, E2, E3 and E4), wherein E1 is the volume of the first preset plug, E2 is the volume of the second preset plug, E3 is the volume of the third preset plug, E4 is the volume of the fourth preset plug, and E1 is less than E2 and less than E3 and less than E4;

presetting a reversal time correction coefficient matrix h of the movable disc belt pulley, and setting h (h 1, h2, h3 and h 4), wherein h1 is a first preset reversal time correction coefficient, h2 is a second preset reversal time correction coefficient, h3 is a third preset reversal time correction coefficient, h4 is a fourth preset reversal time correction coefficient, and h1 is more than 0.8 and less than h2, h3 is more than 0.4 and less than 1.4;

correcting the reversing time of the movable disc belt pulley according to the relation between the volume E of the blocking object and the volume matrix of each preset blocking object:

when E is smaller than E1, the first preset reversal time correction coefficient h1 is selected to correct the reversal time D1 of the first preset movable disc belt pulley, and the reversal time of the corrected movable disc belt pulley is D1 h1;

when E1 is less than or equal to E2, selecting the second preset reversal time correction coefficient h2 to correct the reversal time D2 of the second preset movable disc belt pulley, wherein the reversal time of the corrected movable disc belt pulley is D2 x h2;

when E2 is less than or equal to E3, selecting the third preset reversal time correction coefficient h3 to correct the reversal time D3 of the third preset movable disc belt pulley, wherein the reversal time of the corrected movable disc belt pulley is D3 h3;

when E3 is less than or equal to E4, the fourth preset reversal time correction coefficient h4 is selected to correct the reversal time D4 of the fourth preset movable disc belt pulley, and the reversal time of the corrected movable disc belt pulley is D4 h4.

Preferably, in the processing module, when the normal-reverse rotation switching time interval of the movable-disc pulley is adjusted according to the gear ratio of the speed reducer,

determining a transmission ratio K of the speed reducer, presetting a transmission ratio matrix K0 of the speed reducer, and setting K0 (K1, K2, K3 and K4), wherein K1 is the transmission ratio of a first preset speed reducer, K2 is the transmission ratio of a second preset speed reducer, K3 is the transmission ratio of a third preset speed reducer, K4 is the transmission ratio of a fourth preset speed reducer, and K1 is more than K2 and less than K3 and less than K4;

presetting a positive and negative rotation switching time interval matrix T0 of the movable pulley, and setting T0 (T1, T2, T3 and T4), wherein T1 is a first preset positive and negative rotation switching time interval, T2 is a second preset positive and negative rotation switching time interval, T3 is a third preset positive and negative rotation switching time interval, T4 is a fourth preset positive and negative rotation switching time interval, and T1 is more than T2 and less than T3 and less than T4;

setting the forward and reverse rotation switching time interval of the movable disc belt pulley according to the relation between the transmission ratio K of the speed reducer and the transmission ratio matrix of each preset speed reducer:

when K is smaller than K1, selecting the first preset forward and reverse rotation switching time interval T1 as the forward and reverse rotation switching time interval of the movable disc belt pulley;

when K1 is less than or equal to K2, selecting the second preset forward and reverse rotation switching time interval T2 as the forward and reverse rotation switching time interval of the movable disc belt pulley;

when K2 is less than or equal to K3, selecting the third preset forward and reverse rotation switching time interval T3 as the forward and reverse rotation switching time interval of the movable disc belt pulley;

when K3 is less than or equal to K4, the fourth preset forward and reverse rotation switching time interval T4 is selected as the forward and reverse rotation switching time interval of the movable disc belt pulley.

The application provides a forward and backward rotation transmission device of a cooling fan, which has the following beneficial effects compared with the prior art:

the transmission device comprises a power output end, a middle shaft belt pulley, a transition belt pulley, a movable disc belt pulley, a tensioning pull rod, a motor, a speed reducer and a control device, wherein a transmission ratio sensor is arranged on the speed reducer and used for collecting the transmission ratio of the speed reducer, a temperature sensor is arranged on the power output end and used for collecting the temperature of an engine sealed cabin, an image sensor is also arranged on the power output end and used for collecting the volume of a blockage at a cooling fan, and a time sensor is arranged on the movable disc belt pulley and used for detecting the rotation time of the movable disc belt pulley. The power output end and the tensioning pull rod are controlled by the control device, so that the forward and reverse rotation switching time interval, the forward and reverse rotation time and the rotating speed of the movable pulley can be well set according to the actual working state of the transmission device, the stability of the device is effectively improved, and the waste of resources is avoided.

Drawings

FIG. 1 shows a schematic diagram of a gear train transition in an embodiment of the application;

FIG. 2 shows a schematic diagram of a first state train in an embodiment of the application;

FIG. 3 shows a schematic diagram of a second state train in an embodiment of the application;

FIG. 4 is a schematic view of a movable disk in a first working state according to an embodiment of the present application;

FIG. 5 is a schematic view of a movable disk in a second working state according to an embodiment of the present application;

FIG. 6 shows a front view of a movable plate in an embodiment of the application;

FIG. 7 shows a schematic side cross-sectional view of a movable platen in an embodiment of the present application;

FIG. 8 shows a schematic top view of a movable plate in an embodiment of the application;

fig. 9 shows a schematic diagram of connection between a radiator fan and a steering device in an embodiment of the application;

FIG. 10 shows a schematic side view of an engine in an embodiment of the application;

FIG. 11 shows a schematic top view of an engine in an embodiment of the application;

FIG. 12 is a schematic view showing the construction of a tension rod in an embodiment of the present application;

fig. 13 shows a functional block diagram of a control device in an embodiment of the application.

In the figure, 1, an engine; 2. a second tensioning wheel; 3. a transition pulley; 4. a heat radiation fan; 5. a first pulley; 6. a speed reducer; 7. a motor; 8. a position sensor; 9. a gear; 10. a connecting pipeline; 11. a heat radiation fan; 12. a power output end; 13. a first tensioning wheel; 14. a countershaft pulley; 15. a heat sink; 16. tensioning the pull rod; 17. a bracket; 18. a frame; 19. a movable plate; 20. a plurality of wedges; 21. an SC type belt; 22. a second pulley; 23. a first pulley; 24. a cross slide block; 25. a movable plate; 26. a third pulley; 27. a time sensor; 28. a gear ratio sensor; 29. an image sensor; 30. a temperature sensor; 40. a control device; 100. an acquisition module; 110. a processing module; 120. and a control module.

Detailed Description

The following describes in further detail the embodiments of the present application with reference to the drawings and examples. The following examples are illustrative of the application and are not intended to limit the scope of the application.

In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

The following is a description of preferred embodiments of the application, taken in conjunction with the accompanying drawings.

As shown in fig. 1 to 12, an embodiment of the present application discloses a forward and reverse rotation transmission device of a cooling fan, the device includes:

a power take-off 12;

a countershaft pulley 14 connected to the power take-off 12;

a transition pulley 3 connected to the intermediate shaft pulley 14;

a movable disk pulley connected to the transition pulley 3;

a tension lever 16 connected to the movable-disc pulley for driving the movable-disc pulley to change the direction of the cooling fan 11;

a motor 7 connected to the tension rod 16 for controlling the rotation speed of the tension rod 16;

a speed reducer 6 connected to the motor 7 for reducing the speed of the motor 7;

a transmission ratio sensor 28 is arranged on the speed reducer 6, and the transmission ratio of the speed reducer 6 is acquired through the transmission ratio sensor 28;

the movable disc belt pulley, the power output end 12 and the transition belt pulley 3 are connected through a first belt closed loop; the intermediate shaft belt pulley 14, the transition belt pulley 3 and the movable disc belt pulley are mutually connected to form a closed loop;

the power output end 12 is provided with a temperature sensor 3, the temperature of an engine sealed cabin is collected through the temperature sensor 30, the power output end 12 is also provided with an image sensor 30, and the volume of the plug at the cooling fan 11 is collected through the image sensor 30;

the movable disc belt pulley is provided with a time sensor 27 for detecting the rotation time of the movable disc belt pulley;

and a control device 40 electrically connected with the power output end 12 and the tension rod 16 respectively to control the power output end 12 and the tension rod 16.

It should be noted that the transmission device in the present application includes a power output end 12, a middle shaft pulley 14, a transition pulley 3, a movable disk pulley, a tension rod 16, a motor 7, a speed reducer 6 and a control device 40, the speed reducer 6 is provided with a transmission ratio sensor 28 for acquiring the transmission ratio of the speed reducer 6, the power output end 12 is provided with a temperature sensor 30 for acquiring the temperature of an engine sealed cabin, the power output end 12 is also provided with an image sensor 29 for acquiring the volume of a blockage at the radiator fan 11, and the movable disk pulley is provided with a time sensor 27 for detecting the time of the rotation of the movable disk pulley. The power output end 12 and the tensioning pull rod 16 are controlled by the control device 40, so that the forward and reverse rotation switching time interval, the forward and reverse rotation time and the rotating speed of the movable pulley can be well set according to the actual working state of the transmission device, the stability of the device is effectively improved, and the waste of resources is avoided.

In some embodiments of the present application, the movable disc pulley comprises a movable disc 19, a first pulley 23, a second pulley 22 and a third pulley 26, and the first pulley 23, the second pulley 22 and the third pulley 26 are arranged on the movable disc 19 in a triangle shape;

the first pulley 23, the second pulley 22 and the third pulley 26 are provided with a plurality of transmission surfaces, and the first pulley 23, the second pulley 22 and the third pulley 26 are connected by a second belt closed loop;

the first pulley 23 or the third pulley 26 is connected to the second pulley 22 through the first belt, and the second pulley 22 is used for driving the radiator fan 11.

It should be noted that, the tension rod 16 in the present application can maintain the pulley of the movable disc in a tensioned state through the conversion between the kinetic energy and the elastic potential energy, so as to effectively improve the stability of the device.

In some embodiments of the application, a first tensioning pulley 13 and a second tensioning pulley 2 are also arranged between the intermediate shaft pulley 14 and the power take-off 12.

In the application, when the movable disc belt pulley is switched in the forward and reverse directions, the tension wheel is arranged to effectively tighten the transmission belt, so that the belt is prevented from jumping.

In some embodiments of the application, further comprising:

a bracket 17 hinged to the end of the tension rod 16;

the gear 9 is connected to the motor 7, and the gear 9 is provided with a gear shaft, the gear shaft is connected to the tensioning pull rod 16, and the gear 9 is used for driving the tensioning pull rod 16 to rotate around the bracket 17.

In some embodiments of the present application, the tension rod 16 includes:

a screw;

the compression spring is sleeved on the outer side of the screw rod;

In the application, the tensioning pull rod adopts a plurality of springs to tighten, so that the tensioning force is conveniently controlled, meanwhile, the movement displacement of the sliding block is conveniently controlled, clean and beneficial falling of forward and backward actions is realized, meanwhile, the friction between the springs and the screw is prevented by arranging the sliding sleeve between the compression springs and the screw, and the reliability and the service life of the tensioning pull rod 16 are improved.

In some embodiments of the present application, the control device 40 includes:

the acquisition module is used for acquiring the temperature of the engine sealed cabin, the volume of the blockage, the transmission ratio of the speed reducer 6 and the time when the movable disc belt pulley rotates positively;

a control module for controlling the power take-off 12 and the tension rod 16.

It should be noted that, the present application controls the power output end 12 and the tension rod 16 through the control device 40, so that the working state of the transmission device can be well adjusted according to the actual situation of the transmission device, and the working efficiency is improved.

In some embodiments of the application, in the processing module, when the rotational speed of the movable sheave pulley is adjusted in forward rotation according to the temperature of the engine compartment,

The application can effectively avoid the waste of resources and avoid the problem of damaging the transmission device due to overhigh temperature by collecting the temperature of the engine working cabin in real time and adjusting the forward rotation speed of the movable disc belt pulley according to the actual temperature.

In some embodiments of the application, in the processing module, when the reverse rotation time of the movable sheave pulley is adjusted according to the forward rotation time of the movable sheave pulley,

The application can further improve the reliability of the device by detecting the forward rotation time of the movable disc belt pulley in real time and controlling the reverse rotation time of the movable disc belt pulley according to the forward rotation time.

In some embodiments of the application, in the processing module, the reversal time of the movable disk pulley is also corrected according to the volume of the blockage,

It should be noted that, according to the application, by detecting the volume of the blocking object in real time, the blocking object can be dust or broken leaves, and the method is not particularly limited herein, and the reversing time is corrected by the volume of the blocking object, so that the dust removal efficiency of the transmission device can be improved, and the occurrence of high temperature phenomenon can be avoided.

In some embodiments of the application, in the processing module, when the normal-reverse switching time interval of the movable-disc pulley is adjusted according to the gear ratio of the speed reducer,

The application controls the positive and negative rotation switching time interval of the brake disc belt pulley through the transmission ratio of the speed reducer, can well prevent the belt jump of the transmission device, and ensures the normal operation of the positive and negative loading function of the movable disc belt pulley.

In summary, the transmission device in the application comprises a power output end 12, a middle shaft belt pulley 14, a transition belt pulley 3, a movable disc belt pulley, a tensioning pull rod 16, a motor 7, a speed reducer 6 and a control device 40, wherein a transmission ratio sensor 28 is arranged on the speed reducer 6 and used for acquiring the transmission ratio of the speed reducer 6, a temperature sensor 30 is arranged on the power output end 12 and used for acquiring the temperature of an engine sealed cabin, an image sensor 29 is also arranged on the power output end 12 and used for acquiring the volume of a blockage at the cooling fan 11, and a time sensor 27 is arranged on the movable disc belt pulley and used for detecting the rotation time of the movable disc belt pulley. The power output end 12 and the tensioning pull rod 16 are controlled by the control device 40, so that the forward and reverse rotation switching time interval, the forward and reverse rotation time and the rotating speed of the movable pulley can be well set according to the actual working state of the transmission device, the stability of the device is effectively improved, and the waste of resources is avoided.

In the description of the above embodiments, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

Although the application has been described hereinabove with reference to embodiments, various modifications thereof may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the features of the disclosed embodiments may be combined with each other in any manner as long as there is no structural conflict, and the entire description of these combinations is not made in the present specification merely for the sake of omitting the descriptions and saving resources. Therefore, it is intended that the application not be limited to the particular embodiment disclosed, but that the application will include all embodiments falling within the scope of the appended claims.

Those of ordinary skill in the art will appreciate that: the above is only a preferred embodiment of the present application, and the present application is not limited thereto, but it is to be understood that the present application is described in detail with reference to the foregoing embodiments, and modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A forward and reverse rotation transmission device of a cooling fan, the device comprising:

a power output end;

the intermediate shaft belt pulley is connected with the power output end;

the movable disc belt pulley is connected with the transition belt pulley;

the control device is respectively and electrically connected with the power output end and the tensioning pull rod so as to control the power output end and the tensioning pull rod;

the control device includes:

the control module is used for controlling the power output end and the tensioning pull rod;

in the processing module, when the rotational speed of the movable disk pulley is adjusted according to the temperature of the engine seal compartment,

when A3 is less than or equal to A4, selecting the fourth preset forward rotation speed B4 as the forward rotation speed of the movable disc belt pulley;

in the processing module, when the reverse rotation time of the movable-disc pulley is adjusted according to the forward rotation time of the movable-disc pulley,

when C3 is less than or equal to C4, selecting the fourth preset reversal time D4 as the reversal time of the movable disc belt pulley;

in the processing module, the reverse rotation time of the movable disk pulley is also corrected according to the volume of the blockage,

2. The positive and negative rotation transmission device of a cooling fan according to claim 1, wherein,

the movable disc belt pulley comprises a movable disc, a first belt pulley, a second belt pulley and a third belt pulley, and the first belt pulley, the second belt pulley and the third belt pulley are arranged on the movable disc in a triangular shape;

3. The positive and negative rotation transmission device of a cooling fan according to claim 1, wherein,

and a first tensioning wheel and a second tensioning wheel are further arranged between the intermediate shaft belt pulley and the power output end.

4. The cooling fan forward and reverse rotation transmission device according to claim 1, further comprising:

the bracket is hinged to the tail end of the tensioning pull rod;

5. The cooling fan forward and reverse rotation transmission device according to claim 1, wherein the tension lever includes:

a screw;

the compression spring is sleeved on the outer side of the screw rod;

6. The forward and reverse rotation transmission device of a radiator fan according to claim 1, wherein in the process module, when a forward and reverse rotation switching time interval of the movable sheave pulley is adjusted according to a transmission ratio of the speed reducer,